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ZIF-Mediated Gold Nanorod Assembly for Surface-Enhanced Raman Scattering Detection of 4-Nitrobenzenethiol

Authors
Park, SuhyeonBae, CheongwonLee, JaedeokKim, JeongeonLin, MingKim, Juyeong
Issue Date
24-Dec-2021
Publisher
AMER CHEMICAL SOC
Keywords
finite nanoparticle assembly; gold nanorod; zeolitic imidazolate framework; electron tomography; surface-enhanced Raman scattering
Citation
ACS APPLIED NANO MATERIALS, v.4, no.12, pp.14004 - 14013
Indexed
SCIE
SCOPUS
Journal Title
ACS APPLIED NANO MATERIALS
Volume
4
Number
12
Start Page
14004
End Page
14013
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/2842
DOI
10.1021/acsanm.1c03332
ISSN
2574-0970
Abstract
Nanoparticle assemblies exhibit unique properties compared to single entities due to interactions between their building blocks. Although the development of large-area assemblies has been extensively studied, finite nanoparticle assemblies with tens of building blocks have not been adequately explored. Here, we prepared a finite assembly of anisotropic gold nanorods through encapsulation by a zeolitic imidazolate framework-8 (ZIF). The three-dimensional reconstruction of the ZIF-encapsulated nanorod assembly indicated that the assembled nanorods are separate bundles aligned side-by-side, each of which serves as a nucleation center for a cube-shaped ZIF domain. Further experiments showed that the assembly pattern and the shell dimension can be controlled by the cysteamine and surfactant concentrations. Moreover, the ZIF-encapsulated nanorod assembly had twice the surface-enhanced Raman scattering signal of a single nanorod and showed higher selectivity for 4-nitrobenzenethiol versus rhodamine 6G. Our model system will significantly contribute to the development of finite anisotropic nanoparticle assemblies with microporous metal-organic framework shells and extend their applicability.
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