Cross-scale modulation for aqueous fabrication of monodisperse Cu2−xE(E=S,Se,Te)nanocrystals and supraparticles  

作　　者：Hui Zhu Ge Guo Yunsheng Xia 

机构地区：[1]Key Laboratory of Functional Molecular Solids,Ministry of Education College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241000,China

出　　处：《Nano Research》2023年第1期1448-1458,共11页纳米研究（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.21775004)and Wanjiang Scholar program。

摘　　要：Exploring aqueous nano-fabrication with monodisperse and hierarchical characteristics is fundamentally and technically significant.Herein,we discover that inter-particle nano–nano scale interactions profoundly affect the products’morphology ranging from polydisperse→monodisperse to individual→hierarchical manipulation.Accordingly,we present a“nucleationgrowth-dispersion triple modulation”strategy for fabricating monodisperse Cu2−xE(E=S,Se,Te)nanocrystals(NCs)and supraparticles(SPs).Such full-process and cross-scale control is conducted by two rationally selected ligands(cysteine and citrate molecules),which are responsible for atom/molecule–nano and nano–nano interaction modulations,respectively.Cysteine reacts with the cations and forms low reactive(cysteine-Cu+)n coordination polymers,which overcomes the commonly concerned nucleation and particle growth induced polydispersity.Citrate,by virtue of its strong negative charge modulated NC–NC interactions,decides the products morphology from polydisperse products to monodisperse NCs to monodisperse hierarchical SPs.These findings not only present new insights into aqueous nano-synthesis chemistry but provide an eco-friendly system for versatile and high-quality nano-entity fabrication.

关 键 词：aqueous fabrication MONODISPERSE Cu2−xE nanocrystals Cu2−xE supraparticles photoacoustic imaging 

分 类 号：TB383[一般工业技术—材料科学与工程]