Heat-induced morphological transformation of gold nanodumbbells in ionic surfactant solutions

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Title:	Heat-induced morphological transformation of gold nanodumbbells in ionic surfactant solutions
Authors:	Ting-Chun Wen;Chung-Wen Lu;Wei-Chi Hsieh;Sheng-Te Chang;Ya-Ting Yang;Jin-Pei Deng
Keywords:	Gold nanodumbbell;Gold nanorods;Blue-shift;Surfactant;Transformation
Date:	2018-01-16
Issue Date:	2017-12-19 02:11:24 (UTC+8)
Abstract:	The thermal stability of gold nanodumbbells (NDs) is studied in aqueous solution of ionic surfactants. It is found in aqueous solution of cetyltrimethylammonium bromide that the blue-shift of longitudinal surface plasmon resonance band of gold NDs occurs at 75 °C and the new gold nanorods (NRs) with shortened aspect ratio are formed at the same time. The aspect ratio of the generated gold NRs gradually decreases and finally approaches ∼1.7 after repeated processing. Similarly, the same results are also obtained in aqueous solution of sodium dodecyl sulfate at room temperature. Mechanism is proposed for the shape transformation of gold NDs.
Relation:	Chemical Physics Letters 692, p.38-43
DOI:	10.1016/j.cplett.2017.12.011
Appears in Collections:	[Graduate Institute & Department of Chemistry] Journal Article

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