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Self‐Assembly of Colloidal Nanoparticles into Well‐Ordered Centimeter‐Long Rods via Crack Engineering
Author(s) -
Xie Jingli,
Guo Junchang,
Wang Dehui,
Cang Yu,
Zhang Wenluan,
Zhou Jiajia,
Peng Bo,
Li Yanbo,
Cui Jiaxi,
Chen Longquan,
Fytas George,
Deng Xu
Publication year - 2021
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202000222
Subject(s) - materials science , rod , nanoparticle , nanotechnology , nanoscopic scale , colloidal crystal , colloid , raman scattering , volume fraction , self assembly , raman spectroscopy , composite material , optics , chemical engineering , medicine , alternative medicine , physics , pathology , engineering
Self‐assembly of colloidal nanoparticles (NPs) is widely employed in nanofabrication to have regulated shape with fascinating functions. However, to have a specific desired shape at centimeter‐scale without template is challenging. Herein, by harnessing the colloidal nanoparticle thin film crack engineering, robust and highly transparent centimeter‐scale rods with uniform width and thickness are obtained. The dimension of these rods can be tailored via controlling the solvent composition, NPs volume fraction, and suspension descending rate. Their mechanical stiffness and elastic properties can be further improved by thermal annealing. It is demonstrated that these rods can be used as probes for surface enhanced Raman scattering detection making use of their rich nanostructured surface. This crack engineering strategy can be used as a universal method to assemble the nanoscale colloids into centimeter‐scale rods for analytical and photoelectrical applications.