Fabriaction, characterization and utilization of nano-supercrital layer

Research Project

Project/Area Number	25600026
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Nanomaterials chemistry
Research Institution	The University of Tokushima
Principal Investigator	HASHIMOTO Shuichi 徳島大学, ソシオテクノサイエンス研究部, 教授 (70208445)
Project Period (FY)	2013-04-01 – 2015-03-31
Project Status	Completed (Fiscal Year 2014)
Budget Amount *help	¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000) Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000) Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords	金ナノ粒子 / レーザー励起 / ナノ超臨界層 / コロイド / 光熱変換 / 貴金属ナノ粒子 / レーザ- / 超臨界 / 光熱効果 / 高圧 / 貴金属等ナノ粒子 / レーザー
Outline of Final Research Achievements	We carried out spectroscopic characterization and temperature simulation of　a nano-supercritical layer formed around the gold nanoparticles when the particles are subjected to pulsed-laser irradaition in aqueous solution. We observed the formation of such layers with smaller refractive indecies than water using a picosecond transient extinction spectral measurement. We prepared gold-silica and gold-silver core-shell nanoparticles by laser irradiation under the pressure of 60-100 MPa. The result demonstrated that the nano-supercritical layer is useful for the fabrication of advanced nanomaterials.