Development of Three-Dimensional Fabrication Techniques for Metal Nanoparticles

2014 Fiscal Year Final Research Report

• Project/Area Number: 25600002
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural chemistry
• Research Institution: The University of Tokyo
• Principal Investigator: TATSUMA Tetsu 東京大学, 生産技術研究所, 教授 (90242247)
• Co-Investigator(Renkei-kenkyūsha): NISHI Hiroyasu 東京大学, 生産技術研究所, 助教 (70714137)
• Research Collaborator: KATAGI Yu ; SAITO Koichiro
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 金属ナノ粒子 / 局在表面プラズモン共鳴 / プラズモン誘起電荷分離 / ナノ加工 / ナノフォトニクス / プラズモニクス

Outline of Final Research Achievements

We developed a technique for fabrication of gold nanodumbbells. Gold nanorods are placed on a thin titania film, and gold is photoelectrochemically deposited on the tips of the nanorods to obtain nanodumbbells.
We also developed a technique for selective chamfering of silver nanocubes. The nanocubes are placed on a titania film, and selective excitation of plasmon resonance at the interfacial region (i.e. proximal mode) results in selective chamfering at the bottom of the nanocubes. On the other hand, selective chamfering at the top surface is possible by selective excitation of plasmon resonance at the top surface (i.e. distal mode). The optical properties of the nanocubes can be controlled on the basis of this technique. This technique can also be applied to other types of plasmonic metal nanoparticles.

Free Research Field

光電気化学