Research Article

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2016, 9(11): 3247–3256

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https://doi.org/10.1007/s12274-016-1203-x

Direct self-assembly of CTAB-capped Au nanotriangles

Qiang Fu1,2,3, Guangjun Ran1, and Weilin Xu1 (*)

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1 State Key Laboratory of Electroanalytical Chemistry, and Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, China
2 College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
3 Graduate University of Chinese Academy of Science, Beijing 100049, China

Keywords: suprastructure, Au, nanotriangles, self-assembly, cetyltrimethylammonium bromide (CTAB)
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ABSTRACT Densely packed and ordered “suprastructures” are new types of nanomaterials exhibiting broad applications. The direct self-assembly of cetyltrimethylammonium bromide (CTAB)-capped gold nanotriangles to form “suprastructures” was systematically investigated by varying the temperature and tilt angle of the silicon wafer used in the assembly process. Under optimal conditions, nanotriangles form into regular patterns, maintain their integrity, and form edge-to-edge, point-to-point, and face-to-face connections to form ordered “suprastructures” within an area of hundreds of square microns, achieving a high level of regularity. The formation of the “suprastructures” under optimal conditions could be mainly attributed to the complex balance between multiple temperature-dependent factors, including the atom diffusion rate, solvent evaporation rate, self-assembly rate, and the time for which the nanoparticle stays in the wet medium.
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Direct self-assembly of CTAB-capped Au nanotriangles. Nano Res. 2016, 9(11): 3247–3256 https://doi.org/10.1007/s12274-016-1203-x

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