Rigid POSS Nanofiller Regulated the Interfacial Self-assembly of Particles into 2D Monolayer Superlattice with Fixed Interparticle Spacing  

作　　者：Yu Zhao Xiaoyuan Wang Xiaoning Luo Liping Song Fengmei Su Youju Huang 

机构地区：[1]College of Material,Chemistry and Chemical Engineering,Key Laboratory of Organosilicon Chemistry and Material Technology,Ministry of Education,Hangzhou Normal University,Hangzhou,Zhejiang,311121 China [2]National Synchrotron Radiation Laboratory,CAS Key Laboratory of Soft Matter Chemistry,Anhui Provincial Engineering,Laboratory of Advanced Functional Polymer Film,University of Science and Technology of China,Hefei,Anhui,230026 China [3]National Engineering Research Centre for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou,Henan,450002 China

出　　处：《Chinese Journal of Chemistry》2023年第3期287-293,共7页中国化学（英文版）

基　　金：support from the National Natural Science Foundation of China (52222316,52103325,52111530128);the Ten Thousand People Plan of Zhejiang Province (2019R51012);the Zhejiang Provincial Natural Science Foundation of China (Z22B050001);the China Postdoctoral Science Foundation (2022M713020).

摘　　要：Plasmonic superlattices of nanoparticles(NPs)possess unique“surface lattice resonances”properties that facilitates their wide applications in plasmonic sensing,photocatalysis,and nanoscale light manipulation.However,it is still challenging to manufacture superlattices with precisely controllable NPs distance and break the size limitation of NPs.Herein,we provided an effective strategy to construct NPs superlattices via shape-persistent polyhedral oligosilsesquioxane(POSS)molecular nanoparticles govern interfacial assembly.As a nanoscale molecule with diameter of 1.5 nm,the POSS-SH molecule provides sufficient rigid steric hindrance and hydrophobic effect for tailoring the uniformity and controllable distance between NPs in superlattices.Interestingly,synergistically with hydrophilic ligands of polyethylene glycol(PEG-SH)with optimized ratio,the rigid POSS ligands can effectively regulate the distance between NPs in a fixed range of 2.3—2.8 nm,which is independent of ligands molecular weight and particle size.Furthermore,the effective approach can be universal to anisotropic NPs for manufacturing monolayer films with high NPs density.We believe this nanoscale molecule tailored interfacial self-assembly strategy can effectively break the size of NPs and assembly obstacles for superlattice monolayer film.Additionally,the definite distance between NPs in superlattices can minimize optical energy attenuation and facilitates the applications such as surface-enhanced Raman spectroscopy and photocatalysis.

关 键 词：Polyhedral oligosilsesquioxane Plasmonic superlattices Definite distances Monolayers Nanostructures 2D materials 

分 类 号：TB383[一般工业技术—材料科学与工程]