On February 28th, 2005, AQSIQ (the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China), and SAC (the Standardization Administration of P. R. China)jointly ho...On February 28th, 2005, AQSIQ (the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China), and SAC (the Standardization Administration of P. R. China)jointly hosted the press conference on seven items of national standards on nano-materials in Beijing. The seven items of national standards were approved on Sept. 29th and Dec. 27th, 2004 respectively by SAC, and publicized in Jan. 2005. They will be formally put into practice from April 1st, 2005.展开更多
A dynamic quasi-continuum model is presented to analyze free vibration of plate-type cubic crystal nano-materials.According to the Hamilton principle,fundamental governing equations in terms of displacement components...A dynamic quasi-continuum model is presented to analyze free vibration of plate-type cubic crystal nano-materials.According to the Hamilton principle,fundamental governing equations in terms of displacement components and angles of rotations are given.As an application of the model,the cylindrical bending deformation of the structure fixed at two ends is analyzed,and a theoretical formula evaluating the fundamental frequency is obtained by using Galerkin's method.Meanwhile,the solution for the classical continuous plate model is also derived,and the size-dependent elastic modulus and Poisson's ratio are taken in computation.The frequencies corresponding to different atomic layers are numerically presented for the plate-type NaC l nano-materials.Furthermore,a molecular dynamics(MD)simulation is conducted with the code LAMMPS.The comparison shows that the present quasi-continuum model is valid,and it may be used as an alternative model,which reflects scale effects in analyzing dynamic behaviors of such plate-type nano-materials.展开更多
The design of efficient and low-cost multifunctional electrocatalysts for hydrogen evolution reaction(HER), oxygen evolution reaction(OER) and oxygen reduction reaction(ORR) is critical for the development of clean en...The design of efficient and low-cost multifunctional electrocatalysts for hydrogen evolution reaction(HER), oxygen evolution reaction(OER) and oxygen reduction reaction(ORR) is critical for the development of clean energy. Two-dimensional(2D) carbon-based nano-materials are becoming more and more popular in heterogeneous catalysis due to their cost-effective and multi-scale tunability as single-atom catalysis(SACs) substrates. In this paper, by using first-principles calculation, we designed and demonstrated a novel macropore T-carbon [110](TC) monolayer as 2D electrocatalyst substrate for HER/OER/ORR, and the synergistic modification of the transition metal and nonmetal atoms(TM-X) were investigated to enhance the multifunctional electrocatalytic performance. We screened out the Co embedded in N-doped TC(Co3@N-TC) from 30 TM@X-TC monolayers as a trifunctional electrocatalysts, which exhibits superior performance for HER/ORR/OER on both thermodynamic and kinetic scales, and with excellent thermal and electrochemical stability. Then, the TC monolayer is naturally macropore with a diameter of 5.36 A and exhibits excellent adsorption capacity for the intermediates and products of the redox reactions. Moreover, we revealed the origin of the electrocatalytic activity using the crystal orbital Hamilton population(COHP) and the molecular orbitals(MOs). The d orbital of Co3@N-TC is significantly hybridized with the p orbital of the intermediates, so that the lone electrons initially occupied in the antibonding state pair up and occupy the downward bonding state, allowing *OH to be appropriately adsorbed onto the TC monolayer. This work not only demonstrates that the TM@X-TC monolayer is a superior synergistic trifunctional electrocatalyst, but also reveals a macropore monolayer material with potential applications in electrocatalysis.展开更多
Gas hydrates have recently emerged as a better alternative for the production,storage,and transportation of natural gases.However,factors like slow formation rate and limited storage capacity obstruct the possible ind...Gas hydrates have recently emerged as a better alternative for the production,storage,and transportation of natural gases.However,factors like slow formation rate and limited storage capacity obstruct the possible industrial application of this technique.Different types of promoters and synergists have been developed that can improve the kinetics and storage capacity of gas hydrates.This review focuses on different kinetic promoters and synergists that can be utilized to enhance the storage capacity of hydrates.The main characteristics,structure and the possible limitations of the use of these promoters are likewise portrayed in detail.The relationship between structure and storage capacity of hydrates have also been discussed in the review.Current status of production of gas from hydrates,their restrictions,and future difficulties have additionally been addressed in the ensuing areas of the review.展开更多
Plasma technology has some shortcomings, such as higher energy consumption and byproducts produced in the reaction process. However non-thermal plasma associated with catalyst can resolve these problems. So this kind ...Plasma technology has some shortcomings, such as higher energy consumption and byproducts produced in the reaction process. However non-thermal plasma associated with catalyst can resolve these problems. So this kind of technology was paid more and more attention to treat waste gas. In this paper, we make use of this technology to decompose toluene under different electric field and packed materials. At the same time, the mechanism of toluene decomposition using plasma and catalyst is discussed. The experimental results show toluene decomposition increases with electric field strength increasing and flow velocity and initial concentration decreasing. There are four conditions in plasma: without packed materials (1);with packed materials (2);with BaTiO3 in the surfaces of packed materials (3);and with nanometer Ba0.8Sr0.2Zr0.1Ti0.9O3 (4). Toluene decomposition represents a obvious trend, that is, η(4) > η(3) > η(2) > η(1). The best decomposition efficiency of toluene arrives at 95%.展开更多
Commonly transition metal nano particle are synthesized by physical, chemical or electrochemical methods. In the present work colloidal iridium nanoparticles were synthesized by chemical oxidation method with differen...Commonly transition metal nano particle are synthesized by physical, chemical or electrochemical methods. In the present work colloidal iridium nanoparticles were synthesized by chemical oxidation method with different surfactants like poly vinyl pyrrolidone (PVP), poly vinyl alcohol (PVA) and poly oxyethylene lauryl ether (POLE). It was found that shape and size of Ir-nano particles resulted were related to kind of capping agent (surfactant) used. The characterization of the synthesized nano particle has been carried out by UV-vis, X-ray diffraction (XRD), FT-IR, scanning electron microscopy (SEM) and transmission electron microscopic (TEM) techniques. UV-vis and FT-IR confirm the oxidation of IrCl3 into IrO2 while XRD confirms the amorphous nature of the iridium nanoparticles synthesized. The morphology and size of the particle were confirmed by TEM. The average particle size determined by Scherrer equation was about 4.12 nm to 4.23 nm with PVP, 2.74 to 3.36 nm with PVA and 20.41 to 42.25 nm with POLE. Poly oxyethylene lauryl ether particles were not further analyzed because of their large size and less stability. Further particle size was confirmed with TEM, which was 4.5 nm with PVP and 7.0 nm with PVA. The particles are spherical with no agglomeration tendency.展开更多
Mixed Copper substituted Nickel nano-ferrites having the chemical formula Ni1-xCuxFe2O4 (where x = 0, 0.2, 0.4, 0.6, 0.8, 0.9 and 1.0) were synthesized by citrate gel technique. The crystal structure characterization ...Mixed Copper substituted Nickel nano-ferrites having the chemical formula Ni1-xCuxFe2O4 (where x = 0, 0.2, 0.4, 0.6, 0.8, 0.9 and 1.0) were synthesized by citrate gel technique. The crystal structure characterization and morphology were investigated by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). An elemental composition of the samples were studied by energy dispersive X-ray Spectroscopy (EDS). Lattice parameter, X-ray density, Volume of the Unit Cell and The values of the hopping length for octahedral (dB) and tetrahedral (dA) sites were calculated. The observed results can be explained on the basis of composition.展开更多
A novel optical fiber doped with nano material InP is manufactured by the modified chemical vapor deposition (MCVD). The slow light based on stimulated Brillouin scattering (SBS) in the optical fiber is studied. The r...A novel optical fiber doped with nano material InP is manufactured by the modified chemical vapor deposition (MCVD). The slow light based on stimulated Brillouin scattering (SBS) in the optical fiber is studied. The results show that a time delay of ~738 ps is obtained when the input Stokes pulse is 900 ps(FWHM) and the SBS gain is ~15. It shows that a considerable time delay and an amplification of the input light can be achieved by this novel optical fiber.展开更多
Intelligent nanomedicine is currently one of the most active frontiers in cancer therapy development.Empowered by the recent progresses of nanobiotechnology,a new generation of multifunctional nanotherapeutics and ima...Intelligent nanomedicine is currently one of the most active frontiers in cancer therapy development.Empowered by the recent progresses of nanobiotechnology,a new generation of multifunctional nanotherapeutics and imaging platforms has remarkably improved our capability to cope with the highly heterogeneous and complicated na-ture of cancer.With rationally designed multifunctionality and programmable assembly of functional subunits,the in vivo behaviors of intelligent nanosystems have become increasingly tunable,making them more efficient in performing sophisticated actions in physiological and path-ological microenvironments.In recent years,intelligent nanomaterial-based theranostic platforms have showed great potential in tumor-targeted delivery,biological barrier circumvention,multi-responsive tumor sensing and drug release,as well as convergence with precise medication approaches such as personalized tumor vaccines.On the other hand,the increasing system complexity of anti-cancer nanomedicines also pose significant challenges in charac-terization,monitoring and clinical use,requesting a more comprehensive and dynamic understanding of nano-bio interactions.This review aims to briefly summarize the recent progresses achieved by intelligent nanomaterials in tumor-targeted drug delivery,tumor immunotherapy and temporospatially specific tumor imaging,as well as impor-tant advances of our knowledge on their interaction with biological systems.In the perspective of clinical translation,we have further discussed the major possibilities provided by disease-oriented development of anti-cancer nano-materials,highlighting the critical importance clinically-oriented system design.展开更多
Recent developments of the synthesis and applications of functionalized ionic liquids (including dual-functionalized ionic liquids) have been highlighted in this review. Ionic liquids are at-tracting attention as alte...Recent developments of the synthesis and applications of functionalized ionic liquids (including dual-functionalized ionic liquids) have been highlighted in this review. Ionic liquids are at-tracting attention as alternative solvents in green chemistry, but as more functionalized ILs are pre-pared, a greater number of applications in increasingly diverse fields are found.展开更多
According to the conventional theory of solid solutions (the nearest neighbor atomic interaction model),ordering and spinodal decomposition/clustering are mutually exclusive processes.However,it has been found that th...According to the conventional theory of solid solutions (the nearest neighbor atomic interaction model),ordering and spinodal decomposition/clustering are mutually exclusive processes.However,it has been found that the coexistence of ordering and spinodal decomposition (COSD) occurs in a large number of alloys.This fact gave a strong challenge to the conventional theory.A statistical investigation revealed that the COSD was closely related to large atomic-siae factors.It was thus proposed that the COSD stemmed from the long-range elastic interactions due to atomic-si?E disparity.In order to verify this idea,the formulism of concentration waves was applied to calculating the elastic interactions.The results proved that long-range atomic elastic interactions promoted both ordering and spinodal decomposition.A possible application of the COSD reaction was proposed,i.e.using this reaction to fabricate high-performance "natural nano-alloys".展开更多
1 Results Dendrimers are highly branched organic macromolecules with successive layers or "generations" of branch units surrounding a central core.Organic inorganic hybrid versions have also been produced,by...1 Results Dendrimers are highly branched organic macromolecules with successive layers or "generations" of branch units surrounding a central core.Organic inorganic hybrid versions have also been produced,by trapping metal ions or metal clusters within the voids of the dendrimers.Their unusual,tree-like topology endows these nanometre-sized macromolecules with a gradient in branch density from the interior to the exterior,which can be exploited to direct the transfer of charge and energy from the dendri...展开更多
1 Results Nano-ordered composite materials consisting of organic polymers and inorganic materials have been attracting attention for the purpose of the creation of high-performance or high-functional polymeric materia...1 Results Nano-ordered composite materials consisting of organic polymers and inorganic materials have been attracting attention for the purpose of the creation of high-performance or high-functional polymeric materials. Especially,the word of "polymer hybrid" claims the blends of organic and inorganic components at nano-level dispersion. By using this idea,an enhancement of mechanical strength of organic polymers with silica particles is possible.High transparency of this material is another important ...展开更多
An overview on converging technologies that are the primary drivers of the 4th Industrial Revolution is presented,followed by new developments in advanced manufacturing,nano-,information-technologies and smart civil i...An overview on converging technologies that are the primary drivers of the 4th Industrial Revolution is presented,followed by new developments in advanced manufacturing,nano-,information-technologies and smart civil infrastructure technologies.Convergence of these transformative technologies is discussed.Emphases are on advanced manufacturing,nano mechanics/materials,sensors,structural control,smart structures/materials,energy harvesting,multi-scale problems and simulation methods.展开更多
Biosensor development has recently advanced as a result of their strong and indisputable uses as analytical methods in a variety of sectors,including medicine,food industry,environmental monitoring,metabolism,agricult...Biosensor development has recently advanced as a result of their strong and indisputable uses as analytical methods in a variety of sectors,including medicine,food industry,environmental monitoring,metabolism,agriculture,military,and security.The popularity of biosensors as devices for a variety of applications may be ascribed to their distinct advantages of fast or rapid analysis,high sensitivity,minimal sample demand and preparation,and no need for the specific skill of operation that traditional analytical procedures require.We attempted to update earlier studies in this study by incorporating other materials that have been in use but have received less attention,such as carbon nano-onions(CNOs),metal-organic frameworks(MOFs),and biopolymers for biosensor manufacturing and design based on their unique properties.The assessment also took into account applicable applications in many sectors.Although considerable progress has been made in the application of biosensors,there is still a need for research development and enhancement,particularly in transforming most of the laboratory experiments that have already been published into portable on-site and implementable in the public domains.展开更多
A new kind of nano-rod shaped polycarboxylic acid slump-retaining agent was synthesized.Transmission electron microscope(TEM) experiment showed that the nano-rod was bound together as macromolecular aggregates in solu...A new kind of nano-rod shaped polycarboxylic acid slump-retaining agent was synthesized.Transmission electron microscope(TEM) experiment showed that the nano-rod was bound together as macromolecular aggregates in solution.Application performance studying suggested that this kind nano-sized polymer material had excellently plasticity-retaining performance in cement-based materials and could improve endurance performance of hardened cement-based materials distinctly.The concrete with an initial slump of 2-9 cm could achieve 3 h plasticity-retaining performance with the help of this kind nano-rod.The product had extremely wide application value in the market.展开更多
文摘On February 28th, 2005, AQSIQ (the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China), and SAC (the Standardization Administration of P. R. China)jointly hosted the press conference on seven items of national standards on nano-materials in Beijing. The seven items of national standards were approved on Sept. 29th and Dec. 27th, 2004 respectively by SAC, and publicized in Jan. 2005. They will be formally put into practice from April 1st, 2005.
文摘A dynamic quasi-continuum model is presented to analyze free vibration of plate-type cubic crystal nano-materials.According to the Hamilton principle,fundamental governing equations in terms of displacement components and angles of rotations are given.As an application of the model,the cylindrical bending deformation of the structure fixed at two ends is analyzed,and a theoretical formula evaluating the fundamental frequency is obtained by using Galerkin's method.Meanwhile,the solution for the classical continuous plate model is also derived,and the size-dependent elastic modulus and Poisson's ratio are taken in computation.The frequencies corresponding to different atomic layers are numerically presented for the plate-type NaC l nano-materials.Furthermore,a molecular dynamics(MD)simulation is conducted with the code LAMMPS.The comparison shows that the present quasi-continuum model is valid,and it may be used as an alternative model,which reflects scale effects in analyzing dynamic behaviors of such plate-type nano-materials.
基金supported by the Natural Science Basic Research Program of Shaanxi (No. 2023-JC-YB-065)the Fund of State Key Laboratory of IPOC(BUPT)(No. IPOC2019A013)+2 种基金the Natural Science Foundation of Shaanxi Province (No. 2021JM-371)the Open-Foundation of Key Laboratory of Laser Device Technology,China North Industries Group Corporation Limited (No. KLLDT202103)the Project funded by China Postdoctoral Science Foundation(No. 2022M720516)。
文摘The design of efficient and low-cost multifunctional electrocatalysts for hydrogen evolution reaction(HER), oxygen evolution reaction(OER) and oxygen reduction reaction(ORR) is critical for the development of clean energy. Two-dimensional(2D) carbon-based nano-materials are becoming more and more popular in heterogeneous catalysis due to their cost-effective and multi-scale tunability as single-atom catalysis(SACs) substrates. In this paper, by using first-principles calculation, we designed and demonstrated a novel macropore T-carbon [110](TC) monolayer as 2D electrocatalyst substrate for HER/OER/ORR, and the synergistic modification of the transition metal and nonmetal atoms(TM-X) were investigated to enhance the multifunctional electrocatalytic performance. We screened out the Co embedded in N-doped TC(Co3@N-TC) from 30 TM@X-TC monolayers as a trifunctional electrocatalysts, which exhibits superior performance for HER/ORR/OER on both thermodynamic and kinetic scales, and with excellent thermal and electrochemical stability. Then, the TC monolayer is naturally macropore with a diameter of 5.36 A and exhibits excellent adsorption capacity for the intermediates and products of the redox reactions. Moreover, we revealed the origin of the electrocatalytic activity using the crystal orbital Hamilton population(COHP) and the molecular orbitals(MOs). The d orbital of Co3@N-TC is significantly hybridized with the p orbital of the intermediates, so that the lone electrons initially occupied in the antibonding state pair up and occupy the downward bonding state, allowing *OH to be appropriately adsorbed onto the TC monolayer. This work not only demonstrates that the TM@X-TC monolayer is a superior synergistic trifunctional electrocatalyst, but also reveals a macropore monolayer material with potential applications in electrocatalysis.
基金We gratefully acknowledge the financial assistance provided by Science and Engineering Research Board(SERB)under the Department of Science and Technology(DST)New Delhi,India,and Ministry of Earth Sciences(MoES)Government of India,New Delhi to the Department of Petroleum Engineering,Indian Institute of Techology(ISM),Dhanbad,India.
文摘Gas hydrates have recently emerged as a better alternative for the production,storage,and transportation of natural gases.However,factors like slow formation rate and limited storage capacity obstruct the possible industrial application of this technique.Different types of promoters and synergists have been developed that can improve the kinetics and storage capacity of gas hydrates.This review focuses on different kinetic promoters and synergists that can be utilized to enhance the storage capacity of hydrates.The main characteristics,structure and the possible limitations of the use of these promoters are likewise portrayed in detail.The relationship between structure and storage capacity of hydrates have also been discussed in the review.Current status of production of gas from hydrates,their restrictions,and future difficulties have additionally been addressed in the ensuing areas of the review.
文摘Plasma technology has some shortcomings, such as higher energy consumption and byproducts produced in the reaction process. However non-thermal plasma associated with catalyst can resolve these problems. So this kind of technology was paid more and more attention to treat waste gas. In this paper, we make use of this technology to decompose toluene under different electric field and packed materials. At the same time, the mechanism of toluene decomposition using plasma and catalyst is discussed. The experimental results show toluene decomposition increases with electric field strength increasing and flow velocity and initial concentration decreasing. There are four conditions in plasma: without packed materials (1);with packed materials (2);with BaTiO3 in the surfaces of packed materials (3);and with nanometer Ba0.8Sr0.2Zr0.1Ti0.9O3 (4). Toluene decomposition represents a obvious trend, that is, η(4) > η(3) > η(2) > η(1). The best decomposition efficiency of toluene arrives at 95%.
文摘Commonly transition metal nano particle are synthesized by physical, chemical or electrochemical methods. In the present work colloidal iridium nanoparticles were synthesized by chemical oxidation method with different surfactants like poly vinyl pyrrolidone (PVP), poly vinyl alcohol (PVA) and poly oxyethylene lauryl ether (POLE). It was found that shape and size of Ir-nano particles resulted were related to kind of capping agent (surfactant) used. The characterization of the synthesized nano particle has been carried out by UV-vis, X-ray diffraction (XRD), FT-IR, scanning electron microscopy (SEM) and transmission electron microscopic (TEM) techniques. UV-vis and FT-IR confirm the oxidation of IrCl3 into IrO2 while XRD confirms the amorphous nature of the iridium nanoparticles synthesized. The morphology and size of the particle were confirmed by TEM. The average particle size determined by Scherrer equation was about 4.12 nm to 4.23 nm with PVP, 2.74 to 3.36 nm with PVA and 20.41 to 42.25 nm with POLE. Poly oxyethylene lauryl ether particles were not further analyzed because of their large size and less stability. Further particle size was confirmed with TEM, which was 4.5 nm with PVP and 7.0 nm with PVA. The particles are spherical with no agglomeration tendency.
文摘Mixed Copper substituted Nickel nano-ferrites having the chemical formula Ni1-xCuxFe2O4 (where x = 0, 0.2, 0.4, 0.6, 0.8, 0.9 and 1.0) were synthesized by citrate gel technique. The crystal structure characterization and morphology were investigated by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). An elemental composition of the samples were studied by energy dispersive X-ray Spectroscopy (EDS). Lattice parameter, X-ray density, Volume of the Unit Cell and The values of the hopping length for octahedral (dB) and tetrahedral (dA) sites were calculated. The observed results can be explained on the basis of composition.
基金supported by the National Natural Science Foun-dation of China (No.60871082 and 60544002).
文摘A novel optical fiber doped with nano material InP is manufactured by the modified chemical vapor deposition (MCVD). The slow light based on stimulated Brillouin scattering (SBS) in the optical fiber is studied. The results show that a time delay of ~738 ps is obtained when the input Stokes pulse is 900 ps(FWHM) and the SBS gain is ~15. It shows that a considerable time delay and an amplification of the input light can be achieved by this novel optical fiber.
基金supported by the National Basic Research Plan of China(2018YFE0205300)the National Basic Science Center Project(T2288102)the Key Area Research and Development Program of Guangdong Province(2020B0101020004).
文摘Intelligent nanomedicine is currently one of the most active frontiers in cancer therapy development.Empowered by the recent progresses of nanobiotechnology,a new generation of multifunctional nanotherapeutics and imaging platforms has remarkably improved our capability to cope with the highly heterogeneous and complicated na-ture of cancer.With rationally designed multifunctionality and programmable assembly of functional subunits,the in vivo behaviors of intelligent nanosystems have become increasingly tunable,making them more efficient in performing sophisticated actions in physiological and path-ological microenvironments.In recent years,intelligent nanomaterial-based theranostic platforms have showed great potential in tumor-targeted delivery,biological barrier circumvention,multi-responsive tumor sensing and drug release,as well as convergence with precise medication approaches such as personalized tumor vaccines.On the other hand,the increasing system complexity of anti-cancer nanomedicines also pose significant challenges in charac-terization,monitoring and clinical use,requesting a more comprehensive and dynamic understanding of nano-bio interactions.This review aims to briefly summarize the recent progresses achieved by intelligent nanomaterials in tumor-targeted drug delivery,tumor immunotherapy and temporospatially specific tumor imaging,as well as impor-tant advances of our knowledge on their interaction with biological systems.In the perspective of clinical translation,we have further discussed the major possibilities provided by disease-oriented development of anti-cancer nano-materials,highlighting the critical importance clinically-oriented system design.
文摘Recent developments of the synthesis and applications of functionalized ionic liquids (including dual-functionalized ionic liquids) have been highlighted in this review. Ionic liquids are at-tracting attention as alternative solvents in green chemistry, but as more functionalized ILs are pre-pared, a greater number of applications in increasingly diverse fields are found.
基金Project supported by the National Natural Science Foundation of China.
文摘According to the conventional theory of solid solutions (the nearest neighbor atomic interaction model),ordering and spinodal decomposition/clustering are mutually exclusive processes.However,it has been found that the coexistence of ordering and spinodal decomposition (COSD) occurs in a large number of alloys.This fact gave a strong challenge to the conventional theory.A statistical investigation revealed that the COSD was closely related to large atomic-siae factors.It was thus proposed that the COSD stemmed from the long-range elastic interactions due to atomic-si?E disparity.In order to verify this idea,the formulism of concentration waves was applied to calculating the elastic interactions.The results proved that long-range atomic elastic interactions promoted both ordering and spinodal decomposition.A possible application of the COSD reaction was proposed,i.e.using this reaction to fabricate high-performance "natural nano-alloys".
文摘1 Results Dendrimers are highly branched organic macromolecules with successive layers or "generations" of branch units surrounding a central core.Organic inorganic hybrid versions have also been produced,by trapping metal ions or metal clusters within the voids of the dendrimers.Their unusual,tree-like topology endows these nanometre-sized macromolecules with a gradient in branch density from the interior to the exterior,which can be exploited to direct the transfer of charge and energy from the dendri...
文摘1 Results Nano-ordered composite materials consisting of organic polymers and inorganic materials have been attracting attention for the purpose of the creation of high-performance or high-functional polymeric materials. Especially,the word of "polymer hybrid" claims the blends of organic and inorganic components at nano-level dispersion. By using this idea,an enhancement of mechanical strength of organic polymers with silica particles is possible.High transparency of this material is another important ...
文摘An overview on converging technologies that are the primary drivers of the 4th Industrial Revolution is presented,followed by new developments in advanced manufacturing,nano-,information-technologies and smart civil infrastructure technologies.Convergence of these transformative technologies is discussed.Emphases are on advanced manufacturing,nano mechanics/materials,sensors,structural control,smart structures/materials,energy harvesting,multi-scale problems and simulation methods.
基金funded by the Mexican Government Foreign Affairs Ministry under the Scholarship Program for Foreigner Researchers(S.R.E.-AMEXID 2019-2020).
文摘Biosensor development has recently advanced as a result of their strong and indisputable uses as analytical methods in a variety of sectors,including medicine,food industry,environmental monitoring,metabolism,agriculture,military,and security.The popularity of biosensors as devices for a variety of applications may be ascribed to their distinct advantages of fast or rapid analysis,high sensitivity,minimal sample demand and preparation,and no need for the specific skill of operation that traditional analytical procedures require.We attempted to update earlier studies in this study by incorporating other materials that have been in use but have received less attention,such as carbon nano-onions(CNOs),metal-organic frameworks(MOFs),and biopolymers for biosensor manufacturing and design based on their unique properties.The assessment also took into account applicable applications in many sectors.Although considerable progress has been made in the application of biosensors,there is still a need for research development and enhancement,particularly in transforming most of the laboratory experiments that have already been published into portable on-site and implementable in the public domains.
基金the Jiangsu Province Natural Science Foundation(No.BK2008520)the Jiangsu Postdoctoral Research Funds(No.0901008C)the China Postdoctoral Science Foundation(No.20090461120)
文摘A new kind of nano-rod shaped polycarboxylic acid slump-retaining agent was synthesized.Transmission electron microscope(TEM) experiment showed that the nano-rod was bound together as macromolecular aggregates in solution.Application performance studying suggested that this kind nano-sized polymer material had excellently plasticity-retaining performance in cement-based materials and could improve endurance performance of hardened cement-based materials distinctly.The concrete with an initial slump of 2-9 cm could achieve 3 h plasticity-retaining performance with the help of this kind nano-rod.The product had extremely wide application value in the market.
