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A novel long persistent luminescent material CaGeO_(3):Tb^(3+)with photo-stimulation properties
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作者 Wei Meng Xiaoyan Fu +7 位作者 Tongyan Lin Zewen Liu Naihui Chen Jiaxu Zhang Runyao Liu Rujun Yang Long Chen Hongwu Zhang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2024年第7期1233-1239,I0002,共8页
A novel green long afterglow material CaGeO_(3):Tb^(3+)was synthesized by high temperature solid phase method.According to the experimental results,CaGeO_(3):Tb^(3+)is a green long persistent luminescent(LPL)material ... A novel green long afterglow material CaGeO_(3):Tb^(3+)was synthesized by high temperature solid phase method.According to the experimental results,CaGeO_(3):Tb^(3+)is a green long persistent luminescent(LPL)material with excellent performance.CaGeO_(3):Tb^(3+)shows LPL emission peak at 442,490.9,548.7,588.5 and 623.8 nm,corresponding to ^(5)D_(3) to^(7)F_(4)and^(5)D_(4)to^(7)F_(J)(J=6,5,4,3)transitions of Tb^(3+).Its CIE coordinates are(0.27,0.50),indicating that the afterglow emission is close to the light of green region.In addition,after the excitation source is turned off,the afterglow time is longer than 90 min.After an interval of 7 h,the photo-stimulation luminescence(PSL)can be observed by using 980 nm laser cyclic excitation.The thermoluminescence(ThL)results show that there are three types of traps in the material and their depths are 0.666,0.774 and 0.892 eV respectively,which are caused by the doping of Tb^(3+).All the results show that CaGeO_(3):Tb^(3+)is an excellent long afterglow luminescent material. 展开更多
关键词 Long persistent luminescence Photo-stimulation TRAP CaGeO_(3):Tb^(3+) Rare earths
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Red/NIR/SWIR multi-band persistent luminescent nanoparticles as ultrasensitive multi-channel tracers in water and crude oil/water emulsions
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作者 Yafei Chen Zhengwei Pan 《Nano Research》 SCIE EI CSCD 2023年第11期12706-12712,共7页
We report the use of CaTiO_(3):Pr^(3+)multiband persistent luminescent nanoparticles,which can simultaneously emit red(610 nm),near-infrared(893 nm),and short-wave infrared(1040 nm)photoluminescence and persistent lum... We report the use of CaTiO_(3):Pr^(3+)multiband persistent luminescent nanoparticles,which can simultaneously emit red(610 nm),near-infrared(893 nm),and short-wave infrared(1040 nm)photoluminescence and persistent luminescence,as the tracer nanoagents for water tracer sensing.By using a spectrofluorometer,an Si charge-coupled device(CCD)camera and an InGaAs array camera as the detection tools,we evaluated the sensing capabilities of the three emission bands of CaTiO_(3):Pr^(3+)nanoparticles in brine water solutions and crude oil/brine water emulsions in both photoluminescence mode and persistent luminescence mode.Among these different detection combinations,the persistent luminescence-based Si CCD camera imaging exhibits the best sensing performance with the detection limits being at a single-digit ppb level for the 610 and 893 nm bands and about 100–200 ppb for the 1040 nm band in both water solutions and crude oil/water emulsions,while the photoluminescencebased Si CCD camera imaging has a much higher detection limit of~10 ppm in water solutions and of~200 ppm in oil/water emulsions.The persistent luminescence-based InGaAs array camera imaging to the 1040 nm band has the worst performance with the detection limits higher than 200 ppm for both solutions.The sensing performances of the spectrofluorometer to photoluminescence signals and persistent luminescence signals in the two solutions are about the same,with the detection limits being around 100–200 ppm. 展开更多
关键词 water tracer CaTiO_(3):Pr^(3+)nanoparticles photoluminescence persistent luminescence crude oil/water emulsion detection limit
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Electronic structure of the SrAl_2O_4:Eu^(2+) persistent luminescence material 被引量:10
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作者 Jorma Hls Taneli Laamanen +2 位作者 Mika Lastusaari Janne Niittykoski Pavel Novák 《Journal of Rare Earths》 SCIE EI CAS CSCD 2009年第4期550-554,共5页
The electronic structure of the strontium aluminate (SrAl2O4:Eu^2+) materials was studied with a combined experimental and theo- retical approach. The UV-VUV synchrotron radiation was applied in the experimental s... The electronic structure of the strontium aluminate (SrAl2O4:Eu^2+) materials was studied with a combined experimental and theo- retical approach. The UV-VUV synchrotron radiation was applied in the experimental study while the electronic structure of the non-optimized and optimized crystal structure were investigated theoretically by using the density functional theory. The structure of the valence and conduction bands as well as the band gap energy of the material together with the position of the Eu2+ 4f7 85712 ground state were calculated. The calculated band gap energy (6.4 eV) agreed well with the experimental value of 6.6 eV. The valence band consisted mainly of oxygen states whereas the bottom of the conduction band of strontium states. In agreement with the experimental results, the calculated 4f7 8S7r2 ground state of Eu2+ lies in the energy gap of the host. The position of the 4f7 ground state depended on the Coulomb repulsion strength. The position of the 4f7 ground state with respect to the valence and conduction bands was discussed using theoretical and experimental evidence available. 展开更多
关键词 strontium aluminate persistent luminescence electronic structure DFT calculation rare earths
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Synchrotron radiation investigations of the Sr_2MgSi_2O_7:Eu^(2+),R^(3+) persistent luminescence materials 被引量:5
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作者 Tuomas Aitasalo Jukka Hassinen +5 位作者 Jorma Hls Taneli Laamanen Mika Lastusaari Marja Malkamki Janne Niittykoski Pavel Novák 《Journal of Rare Earths》 SCIE EI CAS CSCD 2009年第4期529-538,共10页
The electronic and defect energy level structure of polyerystalline Sr2MgSi2OT:Eu^2+,R^3+ persistent luminescence materials were studied with thermoluminescence and different synchrotron radiation spectroscopies (... The electronic and defect energy level structure of polyerystalline Sr2MgSi2OT:Eu^2+,R^3+ persistent luminescence materials were studied with thermoluminescence and different synchrotron radiation spectroscopies (UV-VUV emission and excitation, X-ray absorption near-edge spectroscopy (XANES) and extended X-ray absorption f'me structure (EXAFS)). Special attention was paid on the effect of the R3+ co-dopants on the persistent luminescence properties of the materials. Theoretical calculations using the density functional theory (DFT) were carried out simultaneously with the experimental work. The experimental band gap energy (Eg) value of ca. 7.1 eV agreed very well with the DFT value of 6.7 eV. The variation of the Eg value was attempted to relate with the trap structure as well as with the different properties of the R3+ co-dopants. The trap level energy distribution depended strongly on the R3+ co-dopant except for the shallowest trap energy above the room temperature remaining practically the same, however. The different processes in the mechanism of persistent luminescence from Sr2MgSi2OT:Eu^2+,R^3+ were assembled and their contributions discussed. 展开更多
关键词 strontium magnesium disilicate EUROPIUM persistent luminescence synchrotron radiation THERMOLUMINESCENCE mechanism rare earths
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Studies on Self-Luminous Material and Coating with Long Persistent Yellow-Green Afterglow 被引量:4
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作者 邱关明 孙彦彬 +1 位作者 陈永杰 张明 《Journal of Rare Earths》 SCIE EI CAS CSCD 2003年第5期533-537,共5页
The preparation, properties, expression and luminescent mechanism of self luminous material (SrAl 2O 4∶Eu 2+ , Dy 3+ ) were discussed. The long afterglow luminescent coating was prepared by adding proper l... The preparation, properties, expression and luminescent mechanism of self luminous material (SrAl 2O 4∶Eu 2+ , Dy 3+ ) were discussed. The long afterglow luminescent coating was prepared by adding proper luminescent powders SrAl 2O 4∶Eu 2+ , Dy 3+ and other aids into styrene/acrylic emulsion. The best prescription of the coating was defined. The properties of luminescent coating were determined. The primary factors which affect the coating properties were discussed. 展开更多
关键词 optics solid luminescence pigment and coating long persistent self luminescence luminescent coating rare earths
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Roles of crystal defects in the persistent luminescence of Eu^(2+), Dy^(3+) co-doped strontium aluminate based phosphors 被引量:3
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作者 LU Xingdong SHU Wangen 《Rare Metals》 SCIE EI CAS CSCD 2007年第4期305-310,共6页
The roles of different point defects in persistent luminescence of SrAl2O4:Eu,Dy phosphors were investigated. The research results showed that Dyer plays an important role in the persistent luminescence of SrA1EO4:E... The roles of different point defects in persistent luminescence of SrAl2O4:Eu,Dy phosphors were investigated. The research results showed that Dyer plays an important role in the persistent luminescence of SrA1EO4:Eu, Dy phosphors. It can serve as the electron trap of suitable depth for persistent luminescence. V~ does not serve as the electron trap of suitable depth, but its existence can increase the depth of electron traps. There is interaction between the Dy^3+( DySr ) and the Eu^2+(Eu^x Sr ), and only if the distance between the Dy^3+(DySr) and the Eu^2+ (Eu^x Sr) is close enough, the Dyer can work as an effective electron trap. The point defect of V" Sr can be hole trap, but the change of its density in crystal matrix does not arouse the obvious change of persistent luminescence. 展开更多
关键词 inorganic non-metal material strontium aluminate persistent luminescence rare earth ions point defect
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Crystal structure and optical performance analysis of a new type of persistent luminescence material with multi-functional application prospects 被引量:2
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作者 Songsong Ding Pohua Chen +4 位作者 Haijie Guo Peng Feng Yunpeng Zhou Yuhua Wang Junliang Sun 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第6期150-160,I0005,共12页
Persistent luminescence (PersL) materials,as environmentally friendly and energy-saving materials,have broad application prospects in many fields such as lighting,chemistry and even biomedicine.However,studies on the ... Persistent luminescence (PersL) materials,as environmentally friendly and energy-saving materials,have broad application prospects in many fields such as lighting,chemistry and even biomedicine.However,studies on the types,performances and mechanism of PersL materials are still insufficient,which significantly restricts their development and application.Under this consideration,we successfully synthesized a yellow PersL material CaSrGa_(4)O_(8)(CSG).The crystal structure was studied in detail through Rotation Electron Diffraction (RED) and Powder X-ray Diffraction (PXRD).What’s more,by co-doping Mn^(2+) and Yb^(3+),the afterglow brightness of CSG could be increased by nearly 20 times,and the afterglow duration could reach more than 6 h.It is worth mentioning that the samples also have excellent performances in mechanical luminescence (ML),photostimulated luminescence (PSL) and cathodoluminescence (CL),which was also investigated systematically.Finally,an anti-counterfeiting label was designed by the samples to reveal the potential of their application in anti-counterfeiting.The results showed that our research not only provided a new candidate PersL material for multifunctional applications,but also gave good help for studying the physical and chemical properties of CSG. 展开更多
关键词 persistent luminescence Multifunctional materials MECHANOLUMINESCENCE ANTI-COUNTERFEITING CATHODOLUMINESCENCE
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Roles of Eu^(2+), Dy^(3+) Ions in Persistent Luminescence of Strontium Aluminates Phosphors
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作者 吕兴栋 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2008年第5期652-657,共6页
The polycrystalline Eu^2+ and Dy ^3+ co-doped strontium aluminates SrAl2O4: Eu^2+, Dy^3+ with different compositions were prepared by solid state reactions. The UV-excited photoluminescence, persistent luminescen... The polycrystalline Eu^2+ and Dy ^3+ co-doped strontium aluminates SrAl2O4: Eu^2+, Dy^3+ with different compositions were prepared by solid state reactions. The UV-excited photoluminescence, persistent luminescence and thermo-luminescence were studied and compared. Results show that the doped Eu^2+ ion in SrAl2O4: Eu^2+, Dy^3+ phosphors works as not only the UV-excited luminescent center but also the persistent luminescent center. The doped Dy^3+ ion can hardly yield any luminescence under UV-excitation, but effectively enhance the persistent luminescence and thermo-luminescence of SrAl2O4: Eu^2+. Dy^3+ co-doping can help form electron traps with appropriate depth due to its suitable electro-negativity, and increase the density and depth of electron traps. Based on above observations, a persistent luminescence mechanism, electron transfer model, is proposed and illustrated. 展开更多
关键词 strontium aluminate persistent luminescence THERMO-LUMINESCENCE rare earthion
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Photoluminescence and persistent luminescence properties of non-doped and Ti^(4+)-doped Mg_2SnO_4 phosphors
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作者 张加驰 秦青松 +2 位作者 于明汇 周宏亮 周美娇 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第9期253-257,共5页
Mg2Sn04 exhibits green photoluminescence and persistent luminescence, which originate from oxygen vacancies. When Ti4+ ions were doped, an interesting Mg2SnO4:Ti4+ phosphor with bluish white photoluminescence under... Mg2Sn04 exhibits green photoluminescence and persistent luminescence, which originate from oxygen vacancies. When Ti4+ ions were doped, an interesting Mg2SnO4:Ti4+ phosphor with bluish white photoluminescence under ultraviolet irradiation and with green persistent luminescence was first obtained. Our investigation reveals that two emission centres exist in Mg2SnO4:Ti4+. The centres responsible for the green emission are considered to be the F centres (oxygen vacancies) and the blue centres are the TiO6 complex. Trap clusters in the band gap with different [Snmg-oi],[snmg-VO], [SnMg-VO ] and mgsn,correspond to the components at 85 °C, 146 213 °C of the thermoluminescence curve. 展开更多
关键词 PHOSPHOR Mg2Sn04 persistent luminescence photoluminescenee
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X-ray excited Mn^(2+)-doped persistent luminescence materials with biological window emission for in vivo bioimaging 被引量:1
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作者 Hanrun Zheng Lin Liu +6 位作者 Yi’ang Li Rui Rong Liang Song Junpeng Shi Jing Teng Xia Sun Yun Zhang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2024年第1期28-35,I0001,共9页
In recent years,persistent luminescence materials(PLMs)excited by X-rays and emitting in biological windows have received extensive attention in the field of high-sensitivity bioimaging.Transition metal Mn^(2+)is an i... In recent years,persistent luminescence materials(PLMs)excited by X-rays and emitting in biological windows have received extensive attention in the field of high-sensitivity bioimaging.Transition metal Mn^(2+)is an ideal emission center,but few studies focus on Mn^(2+)-doped PLMs with X-ray excitation and biological window emission.Here,we report a Mn^(2+)-doped PLM,LiYGeO_(4):Mn^(2+)(LYGM),with excellent biological window persistent luminescence emission.After excitation by UV,LYGM produces a durable biological window of persistent luminescence emission at 660 nm for up to 20 h.More importantly.LYGM can be repeatedly excited by X-rays,resulting in long-term biological window persistent luminescence emission.In addition,we obtain LYGM around 200 nm in diameter by ball milling and centrifugation and improve its biocompatibility by surface modification to apply it to in vivo imaging in mice.After LYGM are injected into mice through the tail vein,in situ excitation of X-rays can be achieved.After the persistent luminescence decays,LYGM can be re-excited for repeated imaging.Therefore,LYGM shows potential prospects for in vivo deep tissue and long-term bioimaging. 展开更多
关键词 persistent luminescence X-RAY Biological window In vivo imaging Rare earths
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Effect of Na^(+)and Sr^(2+)Substitution on the Formation of the Oxygen Vacancies in Y_(3)Al_(2)Ga_(3)O_(12):Ce^(3+)Phosphor
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作者 YANG Ting JIANG Hongyi +2 位作者 DONG Ye GAO Shuai LIU Shuning 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2023年第5期1221-1230,共10页
The low-valence cations Na^(+)and Sr^(2+)were selected as the co-dopants to increase the vacancies concentration in the Y_(2.982)Ce_(0.018)Al_(2)Ga_(3)O_(12)phosphor.The successful incorporation of Na^(+)and Sr^(2+)wa... The low-valence cations Na^(+)and Sr^(2+)were selected as the co-dopants to increase the vacancies concentration in the Y_(2.982)Ce_(0.018)Al_(2)Ga_(3)O_(12)phosphor.The successful incorporation of Na^(+)and Sr^(2+)was confirmed by the X-Ray Difiraction(XRD)results.All the samples show 5d-4f green persistent luminescence of Ce^(3+)after 450 nm excitation.The decay curves demonstrate that the persistent luminescence is efiectively enhanced with Na+and Sr2+doping.The thermoluminescence glow curves also show not only does the trap concentration increase,but also the distribution of trap depths is broadened.In addition,the air-and H_(2)/Ar-annealing treatments were conducted on every as-made sample.The experimental results prove that the increased traps after the Na^(+)/Sr^(2+)doping are mainly attributed to the oxygen vacancies,and the traps have a continuous and broad distribution of trap depths.We hope this work could give new inspiration for designing a high-performance persistent phosphor. 展开更多
关键词 persistent luminescence YAGG Na^(+) Sr^(2+) oxygen vacancy charge compensation solidstate reaction
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X-ray-activated Bi^(3+)/Pr^(3+)co-doped LiYGeO_4 phosphor with UV and NIR dual-emissive persistent luminescence
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作者 Xianggui Yin Hongyun Zhong +3 位作者 Lin Liu Junpeng Shi Xia Sun Yun Zhang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2024年第5期955-961,I0005,共8页
X-ray-activated luminescence materials have broad application prospects in photodynamic therapy of deep tissue.Among them,X-ray-activated persistent luminescence materials(PLMs)exhibiting multiple emission peaks have ... X-ray-activated luminescence materials have broad application prospects in photodynamic therapy of deep tissue.Among them,X-ray-activated persistent luminescence materials(PLMs)exhibiting multiple emission peaks have drawn extensive attention for the ir capacity to achieve a combination of bioimaging and therapeutic functions.Here,we developed a novel PLM,LiYGeO_4:Bi^(3+),Pr^(3+),that simultaneously exhibits UV and NIR dual persistent luminescence(PersL)emissions after irradiation by X-ray.The material can be re peatedly excited by X-ray and emits similar lumine scence intensity every time,which shows good PersL stability.In addition,LiYGeO_4:Bi^(3+),Pr^(3+)exhibits photostimulated PersL properties by stimulation with a red light-emitting diode(LED)or NIR laser after long-term decay.This work provides a new choice of X-ray-excited PLMs with UV and NIR dual emission and the novel phosphor shows promise as a potential candidate for the integration of treatment and diagnosis of deep tumors. 展开更多
关键词 CO-DOPING X-ray-activated Dual emissions persistent luminescence Rare earths
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Achieving Seconds-to-Hours Duration-Tunable Organic Long Persistent Luminescence from Carbon Dots-Based Exciplex Systems by Energy Gaps Regulation
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作者 Yixuan Xu Kai Jiang +6 位作者 Linger Feng Xinyuan Tong Zuxu Zhou Fengshi Li Yi Zhang Jiaren Du Hengwei Lin 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2024年第12期1407-1417,共11页
Comprehensive Summary Duration-tunable afterglow materials have garnered considerable attention in various applications.Herein,carbon dots(CDs)-based long persistent luminescence(LPL)composites with a tunable duration... Comprehensive Summary Duration-tunable afterglow materials have garnered considerable attention in various applications.Herein,carbon dots(CDs)-based long persistent luminescence(LPL)composites with a tunable duration in an ultrawide range of seconds-to-hours levels were designed and prepared for the first time.In contrast to the established CD-based afterglow materials,we reported that CD-based composites exhibit LPL in the form of exciplexes and long-lived charge-separated states,enabling the LPL to be prolonged from several seconds to over one hour,exceeding the typical regulation range(limited to 1 min).Further studies revealed that the relationship between the excited and charge-transfer states of CDs plays a pivotal role in activating the LPL and regulating its duration.Furthermore,these composites exhibited high photoluminescence(PL)quantum yields of up to 60.63%,and their LPL was robust under ambient conditions,even in aqueous media.Their robust and superior LPL performance endows these composites with a strong competitive advantage in dynamic display systems,such as tags for time-resolved data encryption and displays of the remaining time of takeaways.This study offers an approach to preparing CDs-based LPL composites with tunable durations and may provide new insights for the development of rare-earth-free LPL materials. 展开更多
关键词 Carbon dots Composites Charge separation EXCIPLEX persistent luminescence
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Achieving tunable long persistent luminescence in metal organic halides based on pyridine solvent
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作者 Jun-Ting Mo Zheng Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第9期227-231,共5页
The research of long persistent luminescence(LPL)materials has yield brilliant results in many fields.However,the efforts are still needed for the regulation of the LPL performance.In this work,a series of LPL metal o... The research of long persistent luminescence(LPL)materials has yield brilliant results in many fields.However,the efforts are still needed for the regulation of the LPL performance.In this work,a series of LPL metal organic halides with rich halogen-bond interactions,Py-CdX_(2)(X=Cl,Br,I)were synthesized through self-assembly by Cd X_(2)and pyridine solvent.The steady-state emission redshifted and phosphorescence lifetime declined as the halogen atoms are aggravated.Three halides exhibit adjustable emission from blue to green and multiple phosphorescence from green to yellow at room temperature by changing the excitation wavelengths.Surprisingly,Py-CdX_(2)can emit the visible color-tunable LPL from green to yellow after removing different excitation sources at ambient conditions.Combing the results of theoretical calculation and experimental analysis,it is found that heavy atom effect and the rich intermolecular halogen bond help realize LPL and multiple triplet states originated from the pyridine ring and the halogens. 展开更多
关键词 Metal organic halide Heavy atom effect Halogen bond Tunable long persistent luminescence ANTI-COUNTERFEITING
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Low-Dose X-Ray Activated Self-luminous Bone Cement with NIR-to-NIR Pseudo-upconverted Persistent Luminescence Sensitized by Nd 被引量:1
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作者 Shaochen Lin Gulizhabaier Abulipizi +5 位作者 Li Li Nan Zhang Jiajia Wang Fang Xu Xin Wang Zhanjun Li 《Journal of Analysis and Testing》 EI CSCD 2023年第4期384-391,共8页
X-ray activated near-infrared(NIR)persistent luminescence has promising application in biomedical luminous imaging.However,there are strict medical restrictions on X-ray dosage to avoid radiation disease.There is a ne... X-ray activated near-infrared(NIR)persistent luminescence has promising application in biomedical luminous imaging.However,there are strict medical restrictions on X-ray dosage to avoid radiation disease.There is a need to develop a simple strategy to improve persistent luminescence imaging quality using low-dose X-ray.NIR photo-stimulation can enhance the persistent luminescence intensity by transporting the stored energy from deep traps to shallow ones,so that enhanced upconversion-like NIR-to-NIR persistent luminescence imaging can be conducted after low-dose X-ray excitation.However,existing NIR persistent luminescence phosphors have limited absorption in the NIR.To realize optimized NIR photostimulation,Nd^(3+)is proposed as a potential sensitizer to enhance the absorption of persistent luminescence phosphor to 808 nm light.In this study,ZnGa_(2)O_(4):Sn_(0.1),Cr_(0.003),Nd_(0.01)(ZGSC-Nd)was synthesized with a persistent luminescence peak at~700 nm.After activation with 1 Gy of X-ray,its persistent luminescence attenuated to less than 5%of its original intensity after 2800 s.Interestingly,the nearly vanished persistent luminescence was enhanced 5 times after 808 nm photo-stimulation,which was assigned to Nd absorption.Thus,a pseudo-upconverted persistent luminescence from 808 to 700 nm was realized more efficiently.A Nd-sensitized NIR photo-stimulated persistent luminescence mechanism was proposed.This phenomenon was applied for improved luminous imaging of ZGSC-Nd labeled bone cement after a single low-dose X-ray imaging.This work provides an applicable strategy to realize better persistent luminescence imaging after low-dose X-ray activation and will be significant on designing X-ray activated persistent phosphors for biomedical application. 展开更多
关键词 persistent luminescence Photo-stimulated upconversion Optical imaging Bone cement Nd^(3+)
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Room-Temperature Persistent Luminescence in Metal Halide Perovskite Nanocrystals for Solar-Driven CO_(2)Bioreduction
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作者 Jie Wang Na Chen +4 位作者 Wenjie Wang Zhiheng Li Bolong Huang Yanbing Yang Quan Yuan 《CCS Chemistry》 CAS CSCD 2023年第1期164-175,共12页
The rapid crystal growth of metal halide perovskite(MHP)nanocrystals inevitably leads to the generation of abundant crystal defects in the lattice.Here,defects-mediated long-lived charges and accompanying room-tempera... The rapid crystal growth of metal halide perovskite(MHP)nanocrystals inevitably leads to the generation of abundant crystal defects in the lattice.Here,defects-mediated long-lived charges and accompanying room-temperature persistent luminescence are demonstrated to be a general phenomenon in MHP nanocrystals.Density functional theory calculations suggest that the collaboration of Schottky and point defects enables upward cascading depletion for electron transfer in MHP nanocrystals,leading to the generation of long-lived photoexcited charges with lifetimes over 30 min.The excellent optical properties including the presence of long-lived charges,high charge separation efficiency,and broad absorption in the visible region make MHPs ideal candidates for both photocatalysis and photobiocatalysis.The MHPs were further integrated with enzymes to construct a light-driven biosynthetic system for the selective production of fine chemicals from CO_(2)with solar energy.The biosynthetic system can produce formate with a quantum yield of 3.24%,much higher than that of plants(∼0.2-1.6%).These findings will benefit the understanding of the optoelectronic properties of MHPs and further provide opportunities for the development of biosynthetic systems for solar-to-chemical synthesis. 展开更多
关键词 persistent luminescence nanoparticles metal halide perovskites DEFECTS CO_(2)reduction
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New function of the Yb^(3+) ion as an efficient emitter of persistent luminescence in the short-wave infrared 被引量:13
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作者 Yan-Jie Liang Feng Liu +3 位作者 Ya-Fei Chen Xiao-Jun Wang Kang-Ning Sun Zhengwei Pan 《Light(Science & Applications)》 SCIE EI CAS CSCD 2016年第1期612-617,共6页
The trivalent ytterbium(Yb^(3+))ion has been extensively used as an emitter in short-wave infrared(SWIR)lasers,a sensitizer to activate other lanthanide ions for up-conversion luminescence,and a spectral converter in ... The trivalent ytterbium(Yb^(3+))ion has been extensively used as an emitter in short-wave infrared(SWIR)lasers,a sensitizer to activate other lanthanide ions for up-conversion luminescence,and a spectral converter in Ln^(3+)-Yb^(3+)doubly doped quantum cutting phosphors.Here we report a new function of the Yb^(3+)ion—as an efficient emitting center for SWIR persistent luminescence.We have developed the first real SWIR persistent phosphor,MgGeO3:Yb^(3+),which exhibits very-long persistent luminescence at around 1000 nm for longer than 100 h.The MgGeO3:Yb^(3+)phosphor is spectrally transparent to visible/near-infrared light(~400–900 nm)and is a promising ultraviolet-to-SWIR spectral convertor.The MgGeO3:Yb^(3+)phosphor also exhibits a photostimulated persistent luminescence capability,where the SWIR persistent emission in an ultraviolet-light pre-irradiated sample can be rejuvenated by low-energy light(white or red light)stimulation.The MgGeO3:Yb^(3+)phosphor is expected to have promising applications in biomedical imaging,night-vision surveillance and photovoltaics. 展开更多
关键词 persistent luminescence PHOTOSTIMULATION short-wave infrared(SWIR) ytterbium ions(Yb^(3+))
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Near-infrared light activated persistent luminescence nanoparticles via upconversion 被引量:8
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作者 Zhanjun Li Ling Huang +3 位作者 YuanweiZhang Yang Zhao Hong Yang Gang Han 《Nano Research》 SCIE EI CAS CSCD 2017年第5期1840-1846,共7页
Persistent luminescence nanoparticles (PLNPs) and upconversion nanoparticles (UCNPs) are two special optical imaging nanoprobes. In this study, efficient upconverted persistent luminescence (UCPL) is realized by... Persistent luminescence nanoparticles (PLNPs) and upconversion nanoparticles (UCNPs) are two special optical imaging nanoprobes. In this study, efficient upconverted persistent luminescence (UCPL) is realized by combining their unique features into polymethyl methacrylate, forming a film composed of both PLNPs and UCNPs. The red persistent luminescence (-640 nm) of the PLNPs (CaS:Eu,Tm, Ce) can be activated by upconverted green emission of UCNPs (-NaYF4:Yb, Er@NaYF4) excited by near-infrared light (NIR). Using this strategy, both the unique optical properties of PLNPs and UCNPs can be optimally synergized, thus generating efficient upconversion, photoluminescence, and UCPL simultaneously. The UCPL system has potential applications in in vivo bioimaging by simply monitoring the biocompatible low power density of NIR-light-excited persistent luminescence. Due to its simplicity, we anticipate that this method for the preparation of UCPL composite can be easily adjusted using other available upconversion and persistent phosphor pairs for a number of biophotonic and photonic applications. 展开更多
关键词 NANOPARTICLES IMAGING persistent luminescence UPCONVERSION
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Silica shell-assisted synthetic route for mono-disperse persistent nanophosphors with enhanced in vivo recharged near-infrared persistent luminescence 被引量:7
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作者 Rui Zou Junjian Huang +7 位作者 Junpeng Shi Lin Huang Xuejie Zhang Ka-Leung Wong Hongwu Zhang Dayong Jin Jing Wang Qiang Su 《Nano Research》 SCIE EI CAS CSCD 2017年第6期2070-2082,共13页
Near-infrared (NIR) persistent-luminescence nanoparticles have emerged as a new class of background-free contrast agents that are promising for in vivo imaging. The next key roadblock is to establish a robust and co... Near-infrared (NIR) persistent-luminescence nanoparticles have emerged as a new class of background-free contrast agents that are promising for in vivo imaging. The next key roadblock is to establish a robust and controllable method for synthesizing monodisperse nanoparticles with high luminescence brightness and long persistent duration. Herein, we report a synthesis strategy involving the coating/etching of the SiO2 shell to obtain a new class of small NIR highly persistent luminescent ZnGa2O4:Cr^3+,Sn^4+(ZGOCS) nanoparticles. The optimized ZGOCS nanoparticles have an excellent size distribution of -15 nm without any agglomeration and an NIR persistent luminescence that is enhanced by a factor of 13.5, owing to the key role of the SiO2 shell in preventing nanoparticle agglomeration after annealing. The ZGOCS nanoparticles have a signal-to-noise ratio -3 times higher than that of previously reported ZnGa204:Cr^3+ (ZGC-1) nanoparticles as an NIR persistent-luminescence probe for in vivo bioimaging. Moreover, the persistent-luminescence signal from the ZGOCS nanoparticles can be repeatedly re-charged in situ with external excitation by a white light- emitting diode; thus, the nanopartides are suitable for long-term in vivo imaging applications. Our study suggests an improved strategy for fabricating novel high-performance optical nanoparticles with good biocompatibility. 展开更多
关键词 core-shell structure in vivo imaging narrow size distribution near-infrared (NIR)persistent luminescence BIOCOMPATIBILITY
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Recent progress in synthesis of lanthanide-based persistent luminescence nanoparticles 被引量:6
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作者 Yurong Wei Chengxu Gong +6 位作者 Min Zhao Lei Zhang Shaodan Yang Peixu Li Zhao Ding Quan Yuan Yanbing Yang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2022年第9期1333-1342,I0001,共11页
Persistent luminescence nanoparticles(PLNPs)are a kind of phosphors that can remain luminescent for seconds to several days after the stoppage of excitation.Lanthanides show the special capability to largely broaden t... Persistent luminescence nanoparticles(PLNPs)are a kind of phosphors that can remain luminescent for seconds to several days after the stoppage of excitation.Lanthanides show the special capability to largely broaden the emission range and enhance the luminescence intensity of PLNPs due to their dense energy structure and unique electronic configurations.In the past decades,various methods have been developed for the synthesis of lanthanide-based PLNPs with excellent pe rsistent luminescence propertie s,and the lanthanide-based PLNPs are widely studied in areas including biome dicine,energy,and information storage.In this review,we summarized the research progress in the synthe sis of lanthanidebased PLNPs and outline d several typical synthesis methods.We discussed the fundamental concepts of preparation methods as well as the advantages and drawbacks of the typical synthetic approache s.Moreove r,the current challenges and the potential solutions for the development of lanthanide-based PLNP s are also discussed in an attempt to provide strate gies to further improve the optical properties of lanthanide-based PLNPs.We hope this review can contribute to the design of lanthanide-based PLNPs with desired properties and further promote their applications in biomedicine,energy,and information science. 展开更多
关键词 LANTHANIDE persistent luminescence NANOPARTICLES DEFECTS BIOIMAGING Rare earths
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