Hydrothermal synthesis of copper nanoparticles using supercritical water reduction method for preparing of conductive copper nanoink

2016 Fiscal Year Final Research Report

• Project/Area Number: 26390033
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nanomaterials engineering
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Hayashi Hiromichi 国立研究開発法人産業技術総合研究所, 材料・化学領域研究戦略部, 連携主幹 (20344228)
• Research Collaborator: MORIOKA Takuya ; NUMAGA Nanami
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 銅ナノ粒子 / 水熱合成法 / 配線用導電性インク / 表面修飾 / 分散・耐酸化安定性

Outline of Final Research Achievements

Printed electronics are being explored world-wide due to their potential use in functional low-cost devices that are flexible, stretchable, and lightweight. Surface-modified zero-valent copper nanoparticles (CuNPs) are of interest as conductive inks for applications in printed electronics. In this work, polyacrylic acid (PAA) has been applied as surface modifier to study its synthesis conditions for making CuNPs and anti-oxidation stability in dispersions. The precursor, copper(2-ethylhexanate), was fed as an aqueous solution with PAA and mixed with an aqueous formic acid stream to have reaction conditions of 400℃, 30 MPa and 1.1s. The surface-modified CuNPs were redispersed in ethanol and methanol and found to exhibit long-term stability as evaluated by shifts in the surface plasmon resonance band. Conductive films prepared with the CuNPs exhibited a resistivity of 1.4x10-5Ωcm.

Free Research Field

材料化学