Preparation of copper nanoparticles for metal-metal bonding by aqueous reduction with D-glucose and PVP

Giuseppe Granata, Aina Onoguchi, Chiharu Tokoro

Research output: Contribution to journalArticle

Abstract

Copper nanoparticles (CuNPs) for metal-metal bonding were prepared by aqueous reduction with D-glucose and polyvinylpirrolidone (PVP). Increasing the cupric concentration in the range 0.1–1.0 M resulted in a progressive increase in CuNPs size from 30 nm to 200 nm. Fourier-transform infrared spectroscopy (FTIR) revealed as the PVP groups responsible for capping were C–N and C[dbnd]O at low cupric concentration and only C[dbnd]O at higher concentration. X-ray absorption fine structure (XAFS) revealed as the reduction occurred in two steps, with a fast reduction of CuO to Cu2O and a slower reduction of Cu2O. The reaction kinetics was modeled as a series of two irreversible first order reactions based on XAFS results. LC-MS highlighted as D-glucose oxidized to gluconate, glycerate, glycolate and oxalate. Increasing the D-glucose concentration did not affect the kinetics but resulted in smaller CuNPs. The electrical resistivity of the CuNPs material sintered at 300 °C was 36 µΩ cm.

Original languageEnglish
Article number115210
JournalChemical Engineering Science
Volume209
DOIs
Publication statusPublished - 2019 Dec 14

Keywords

  • Copper nanoparticles
  • D-glucose
  • Kinetics
  • PVP
  • Sintering
  • XAFS

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Preparation of copper nanoparticles for metal-metal bonding by aqueous reduction with D-glucose and PVP'. Together they form a unique fingerprint.

  • Cite this