典型文献
Surface-rare-earth-rich upconversion nanoparticles induced by heterovalent cation exchange with superior loading capacity
文献摘要：
Surface modification of different functional molecules onto NaREF4(RE=rare earth)upconversion nanoparticles(UCNPs)impart their multiple functionalities.Functional molecules can be loaded onto NaREF4 UCNPs through the formation of coordination bonds between the surface-exposed RE3+ions and the appropriate chemical groups of functional molecules.The density of surface RE3+ions directly de-termines the loading efficiency of NaREF4 UCNPs.However,NaREF4 is a binary cation system,rendering the surface-distributed Na+and RE3+ions remains a mystery.Here,we develop an effective strategy to significantly enhance the density of surface RE3+ions,thus maximizing the loading capacity of NaREF4 UCNPs.This strategy is based on a heterovalent cation exchange(HCE)reaction in the surface region in which Na+ions are replaced by RE3+ions.The density of surface ligands enhances from 3.6 to 8.8 molecules/nm2 after reaction,suggesting that the loading efficiency increases by approximately 150％.Benefiting from the improved loading capacity,we demonstrate such surface-RE-rich nanoparticles have the ability to offer higher colloidal stability and more desirable photodynamic therapy(PDT)efficacy.This work not only advances our understanding of cation exchange reactions in RE-based nanoparticles,but also provides significant value for considerable applications such as sensing,bioimaging,and therapy.
文献关键词：
中图分类号：
作者姓名：
Meifeng Wang;Yiru Qin;Wei Shao;ZhiWang Cai;Xiaoyu Zhao;Yongjun Hu;Tao Zhang;Sheng Li;Mark T.Swihart;Yang Liu;Wei Wei
作者机构：
MOE&Guangdong Provincial Key Laboratory of Laser Life Science,Guangzhou Key Laboratory of Spectral Analysis and Functional Probes,College of Biophotonics,South China Normal University,Guangzhou 510631,China;Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology,Institute of Insect Science and Technology&School of Life Sciences,South China Normal University,Guangzhou 510631,China;State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Department of Chemical and Biological Engineering,University at Buffalo,the State University of New York,Buffalo,NY 14260,United States
文献出处：
引用格式：
[1]Meifeng Wang;Yiru Qin;Wei Shao;ZhiWang Cai;Xiaoyu Zhao;Yongjun Hu;Tao Zhang;Sheng Li;Mark T.Swihart;Yang Liu;Wei Wei-.Surface-rare-earth-rich upconversion nanoparticles induced by heterovalent cation exchange with superior loading capacity)[J].材料科学技术（英文版）,2022(02):223-228
A类：
heterovalent,NaREF4,RE3+ions,termines
B类：
Surface,rare,earth,rich,upconversion,nanoparticles,induced,by,exchange,superior,loading,capacity,modification,different,molecules,onto,UCNPs,impart,their,multiple,functionalities,Functional,loaded,through,formation,coordination,bonds,between,surface,exposed,appropriate,chemical,groups,density,directly,efficiency,However,binary,system,rendering,distributed,Na+and,remains,mystery,Here,develop,effective,strategy,significantly,thus,maximizing,This,HCE,region,which,Na+ions,replaced,ligands,enhances,from,nm2,after,suggesting,that,increases,approximately,Benefiting,improved,demonstrate,such,have,offer,higher,colloidal,stability,more,desirable,photodynamic,therapy,PDT,efficacy,work,not,only,advances,our,understanding,reactions,also,provides,value,considerable,applications,sensing,bioimaging
AB值：
0.485731
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