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journal article·2019-08Open access

Directing Gold Nanoparticles into Free‐Standing Honeycomb‐Like Ordered Mesoporous Superstructures

Xiaotong Wu, Jinping Chen, Lin Xie, Jing Li, Jing Shi, Shuiping Luo, Xixia Zhao, Kerong Deng, Dongsheng He, Jiaqing He, Jun Luo, Zhongwu Wang, Zewei Quan

Small· Volume 15· Issue 31
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Source abstract

Abstract

Abstract 2D mesoporous materials fabricated via the assembly of nanoparticles (NPs) not only possess the unique properties of nanoscale building blocks but also manifest additional collective properties due to the interactions between NPs. In this work, reported is a facile and designable way to prepare free‐standing 2D mesoporous gold (Au) superstructures with a honeycomb‐like configuration. During the fabrication process, Au NPs with an average diameter of 5.0 nm are assembled into a superlattice film on a diethylene glycol substrate. Then, a subsequent thermal treatment at 180 °C induces NP attachment, forming the honeycomb‐like ordered mesoporous Au superstructures. Each individual NP connects with three neighboring NPs in the adjacent layer to form a tetrahedron‐based framework. Mesopores confined in the superstructure have a uniform size of 3.5 nm and are arranged in an ordered hexagonal array. The metallic bonding between Au NPs increases the structural stability of architected superstructures, allowing them to be easily transferred to various substrates. In addition, electron energy‐loss spectroscopy experiments and 3D finite‐difference time‐domain simulations reveal that electric field enhancement occurs at the confined mesopores when the superstructures are excited by light, showing their potential in nano‐plasmonic applications.
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Research context

Nanomaterials

OpenAlex topics: Nanoporous metals and alloys · Electrocatalysts for Energy Conversion · Mesoporous Materials and Catalysis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry Southern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 China

School of Chemical Biology and Biotechnology (SCBB) Peking University Shenzhen Graduate School Shenzhen Guangdong 518055 China

Center for Electron Microscopy and Tianjin Key Lab of Advanced Functional Porous Materials Institute for New Energy Materials School of Materials Tianjin University of Technology Tianjin 300384 China

Department of Physics Southern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 China

Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China

Materials Characterization and Preparation Center Southern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 China

Cornell High Energy Synchrotron Source Cornell University Ithaca NY 14853 USA

Funding

National Natural Science Foundation of China · Guangdong Science and Technology Department · Development and Reform Commission of Shenzhen Municipality · National Science Foundation

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