Pseudo single crystallization of Prussian-blue and its analog nanoparticles via their regular arrangement and low-temperature connection

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03783
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Inorganic chemistry
• Research Institution: Yamagata University
• Principal Investigator: KURIHARA MASATO 山形大学, 理学部, 教授 (50292826)
• Co-Investigator(Kenkyū-buntansha): 金井塚 勝彦 山形大学, 理学部, 准教授 (50457438) ; 石崎 学 山形大学, 理学部, 助教 (60610334) ; 冨樫 貴成 山形大学, 理学部, 助教 (80510122)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ナノ結晶 / 配位高分子 / プルシアンブルー / プロトン伝導 / 溶液プロセス / 規則配列

Outline of Final Research Achievements

We have successfully fabricated a water-dispersion solution of Prussian-blue (PB) nanoparticles(NPs) and their mono-particle film on a self-assembly monolayer film via chemical adsorption between interdigitated Au electrodes. The mono-particle film was heated at 120°C to chemically connect the PB NPs into each other. Based on the Bode-plot analyses, the non-heated film showed low proton conductivities in a low-frequency region, while high proton conductivities appeared in a high-frequency region from the low-temperature heated film. The high proton conduction (10-1 Scm-1) of the heated film is superior performance along with a water-retention ability (humidity dependence) in comparison with Nafion films. The proton conduction is derived from the vehicle mechanism in the non-heated films. The proton conduction is transferred into Grotthuss mechanism in the heated films. These results are the first report on a new function as a pseudo single crystalline films composed of NPs.

Free Research Field

ナノ材料化学