Construction of anisotropic re-shaping mechanism of gold crystals with self-assembling surfactants
| Project/Area Number |
16K12634
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental conscious materials and recycle
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| Research Institution | Ochanomizu University |
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Principal Investigator |
Imura Clara お茶の水女子大学, 基幹研究院, 講師 (60707107)
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| Co-Investigator(Renkei-kenkyūsha) |
IMURA Yoshiro 東京理科大学, 工学部工業化学科, 助教 (70756288)
SHINDO Hitoshi 中央大学, 理工学部応用化学科, 教授 (90245986)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | ナノ結晶 / 金 / 界面活性剤 / 形態制御 / ナノ材料 / 複合材料・物性 / 界面化学 / ナノ触媒 / 環境対応 |
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| Outline of Final Research Achievements |
Shape-control of gold crystals is important because their properties strongly depend on the structures and the sizes. In this work, anisotropic-re-shaping of gold crystals are investigated for the sustainable use of the catalytic applications.
First, micro-sized tabular gold crystals were prepared by reduction of HAuCl4 in the presence of a long chain amidoamine derivative. Reshaping of the gold crystals was approached by adding CTAB/HAuCl4 mixture. At the initial stage, the tabular crystals were etched by Br- and were changed into granular crystals. In the later stage, however, the etched crystals were reshaped into rod crystals having {211} and {110} facets due to surface selective adsorption of CTAB micelles. The rod crystals grew along the <111> direction. AFM and SAED observation revealed that anisotropic growth was caused by the changes in stabilities of gold crystal facets using the surfactant.
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Report
(3 results)
Research Products
(22 results)
