Flexible electrochromic energy storage devices(FECESDs)for powering flexible electronics have attracted considerable attention.Silver nanowires(AgNWs)are one kind of the most promising flexible transparent electrodes(...Flexible electrochromic energy storage devices(FECESDs)for powering flexible electronics have attracted considerable attention.Silver nanowires(AgNWs)are one kind of the most promising flexible transparent electrodes(FTEs)materials for the emerging flexible devices.Currently,fabricating FECESD based on AgNWs FTEs is still hindered by their intrinsic poor electrochemical stability.To address this issue,a hybrid AgNWs/Co(OH)_(2)/PEDOT:PSS electrode is proposed.The PEDOT:PSS could not only improve the resistance against electrochemical corrosion of AgNWs,but also work as functional layer to realize the color-changing and energy storage properties.Moreover,the Co(OH)_(2)interlayer further improved the color-changing and energy storage performance.Based on the improvement,we assembled the symmetrical FECESDs.Under the same condition,the areal capacitance(0.8 mF cm^(−2))and coloration efficiency(269.80 cm^(2)C−1)of AgNWs/Co(OH)_(2)/PEDOT:PSS FECESDs were obviously higher than AgNWs/PEDOT:PSS FECESDs.Furthermore,the obtained FECESDs exhibited excellent stability against the mechanical deformation.The areal capacitance remained stable during 1000 times cyclic bending with a 25 mm curvature radius.These results demonstrated the broad application potential of the AgNWs/Co(OH)_(2)/PEDOT:PSS FECESD for the emerging portable and multifunctional electronics.展开更多
Colorimetric and fluorescent probes have emerged as a potent tool for pH sensing due to easy operation and high sensitivity.However,most of the existing bimodal probes require complicated synthesis,which greatly limit...Colorimetric and fluorescent probes have emerged as a potent tool for pH sensing due to easy operation and high sensitivity.However,most of the existing bimodal probes require complicated synthesis,which greatly limits their wide applications.Herein,a simple fluorescent dye(called BFCUR)featuring a D-π-A-π-D conjugated system was developed from the natural polyphenol curcumin(CUR).BFCUR exhibited significant red-shift in UV absorption and fluorescence emission as pH increased because of the deprotonation of the phenolic hydroxyl groups,which resulted in the enhanced intramolecular charge transfer(ICT).The ratiometric pH detection of BFCUR was achieved with remarkable accuracy by monitoring both the absorbance ratio A;/A;and the fluorescence intensity ratio I;/I;under various pH values.In addition,the clear color changes of BFCUR under different pH conditions were visible,which enabled BFCUR to be used in test strips for rapid,visual pH detection.Moreover,BFCUR exhibited low cytotoxicity,and was successfully applied for intracellular pH detection,where the fluorescence intensity was linearly related to pH value.This study highlighted the great potential of CUR-derived BFCUR as colorimetric and fluorescent probes for ratiometric-pH sensing and cell imaging.展开更多
基金supports from the National Natural Science Foundation of China (Grant No. 52175300)Fundamental Research Funds for the Central Universities (2022FRFK060008)+2 种基金Heilongjiang Touyan Innovation Team Program (HITTY-20190013)Shenzhen Fundamental Research Programs (JCYJ20200925160843002)Start-up fund of SUSTech (Y01256114)
文摘Flexible electrochromic energy storage devices(FECESDs)for powering flexible electronics have attracted considerable attention.Silver nanowires(AgNWs)are one kind of the most promising flexible transparent electrodes(FTEs)materials for the emerging flexible devices.Currently,fabricating FECESD based on AgNWs FTEs is still hindered by their intrinsic poor electrochemical stability.To address this issue,a hybrid AgNWs/Co(OH)_(2)/PEDOT:PSS electrode is proposed.The PEDOT:PSS could not only improve the resistance against electrochemical corrosion of AgNWs,but also work as functional layer to realize the color-changing and energy storage properties.Moreover,the Co(OH)_(2)interlayer further improved the color-changing and energy storage performance.Based on the improvement,we assembled the symmetrical FECESDs.Under the same condition,the areal capacitance(0.8 mF cm^(−2))and coloration efficiency(269.80 cm^(2)C−1)of AgNWs/Co(OH)_(2)/PEDOT:PSS FECESDs were obviously higher than AgNWs/PEDOT:PSS FECESDs.Furthermore,the obtained FECESDs exhibited excellent stability against the mechanical deformation.The areal capacitance remained stable during 1000 times cyclic bending with a 25 mm curvature radius.These results demonstrated the broad application potential of the AgNWs/Co(OH)_(2)/PEDOT:PSS FECESD for the emerging portable and multifunctional electronics.
基金supported by the National Natural Science Foundation of China(Nos.51922111,21774054,21574061)the Science and Technology Development Fund,Macao SAR(No.083/2017/A2)+1 种基金Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials(No.2019B121205002)funded by Shenzhen Fundamental Research Programs(No.JCYJ20170412152922553)。
文摘Colorimetric and fluorescent probes have emerged as a potent tool for pH sensing due to easy operation and high sensitivity.However,most of the existing bimodal probes require complicated synthesis,which greatly limits their wide applications.Herein,a simple fluorescent dye(called BFCUR)featuring a D-π-A-π-D conjugated system was developed from the natural polyphenol curcumin(CUR).BFCUR exhibited significant red-shift in UV absorption and fluorescence emission as pH increased because of the deprotonation of the phenolic hydroxyl groups,which resulted in the enhanced intramolecular charge transfer(ICT).The ratiometric pH detection of BFCUR was achieved with remarkable accuracy by monitoring both the absorbance ratio A;/A;and the fluorescence intensity ratio I;/I;under various pH values.In addition,the clear color changes of BFCUR under different pH conditions were visible,which enabled BFCUR to be used in test strips for rapid,visual pH detection.Moreover,BFCUR exhibited low cytotoxicity,and was successfully applied for intracellular pH detection,where the fluorescence intensity was linearly related to pH value.This study highlighted the great potential of CUR-derived BFCUR as colorimetric and fluorescent probes for ratiometric-pH sensing and cell imaging.
