Nanoscale Cinematography of Soft Matter System under Liquid-Phase TEM  

作　　者：Zihao Ou Chang Liu Lehan Yao Qian Chen 

机构地区：[1]Department of Materials Science and Engineering,University of Illinois at Urbana−Champaign,Urbana,Illinois 61801,United States [2]Department of Materials Science and Engineering,Materials Research Laboratory,Beckman Institute for Advanced Science and Technology,and Department of Chemistry,University of Illinois at Urbana−Champaign,Urbana,Illinois 61801,United States

出　　处：《Accounts of Materials Research》2020年第1期41-52,共12页材料研究述评（英文）

基　　金：This work was supported by the National Science Foundation under Grant No.1752517.

摘　　要：CONSPECTUS:One emergent theme in“soft matter”is to understand and manipulate the self-organization of synthetic materials and biological entities in space and time at the underexplored nanoscale.Encoded at this length scale can be a diversity of spatiotemporally fluctuating dynamics that are critical to function,from phase transition of nanoparticle self-assemblies as reconfigurable devices and morphology development of polymer membranes as separation layers for wastewater reclamation to the transformation of membrane proteins as the gatekeeper for mass and information flow in living cells.Extensive research efforts have thus been focused on resolving and understanding such dynamics that typically occur in a liquid medium.The proliferation of methods such as liquid-phase atomic force microscopy,cryogenic electron microscopy,and super-resolution optical microscopy has greatly expanded our knowledge in the structure or dynamics of soft matter at the nanoscale.However,these techniques do not offer direct real-space,real-time imaging of the structural and functional dynamics in a native liquid environment with nanometer resolution.This lack of experimental dataset also renders predictive modeling or computation difficult.As a result,how nanoscale morphology and interaction of the constituents affect the self-organization pathways or broadly collective structural evolution,such as interconversion among metastable states,as well as the involved energy measures remains poorly understood.In this Account,we present our recent efforts in adapting and using a nanoscopic cinematography method relatively new to the soft matter community,liquid-phase transmission electron microscopy(TEM),to study the self-organization pathways of nanoscale colloidal matter.Liquid-phase TEM has opened a new avenue to investigate materials chemistry questions,such as electrochemistry and catalysis,nanomaterial diffusion and growth,and nucleation of minerals and atomic crystals.Applying it to soft matter systems involves tackling complication

关 键 词：COLLECTIVE interaction ANALOGY 

分 类 号：TB3[一般工业技术—材料科学与工程]