ZIF-Mediated Gold Nanorod Assembly for Surface-Enhanced Raman Scattering Detection of 4-Nitrobenzenethiol
- Park, Suhyeon; Bae, Cheongwon; Lee, Jaedeok; Kim, Jeongeon; Lin, Ming; Kim, Juyeong
- Issue Date
- AMER CHEMICAL SOC
- finite nanoparticle assembly; gold nanorod; zeolitic imidazolate framework; electron tomography; surface-enhanced Raman scattering
- ACS APPLIED NANO MATERIALS, v.4, no.12, pp.14004 - 14013
- Journal Title
- ACS APPLIED NANO MATERIALS
- Start Page
- End Page
- 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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- 자연과학대학 > 화학과 > Journal Articles
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