Crystal-to-crystal conversion of Cu2O nanoparticles to Cu crystals and applications in printed electronics

Woo-ram Lee; Young S. Lim; Sowon Kim; Jaehoon Jung; Young-Kyu Han; Sungho Yoon; Longhai Piao; Sang-Ho Kim

doi:10.1039/C1JM10110B

Crystal-to-crystal conversion of Cu₂O nanoparticles to Cu crystals and applications in printed electronics†

Woo-ram Lee,^a Young S. Lim,^b Sowon Kim,^a Jaehoon Jung,‡^a Young-Kyu Han,^c Sungho Yoon,^d Longhai Piao^e and Sang-Ho Kim*^e

Author affiliations

* Corresponding authors

^a Corporate R&D, LG Chem Research Park, 104-1 Moonji-dong, Yuseong-gu, Daejeon, Republic of Korea
E-mail: wrlee@chem.ucsb.edu
Fax: +82 42 8612057
Tel: +82 42 8706433

^b Green Ceramics Division, KICET, 233-5 Gasan-dong, Geumcheon-gu, Seoul, Republic of Korea

^c Division of Materials Science, Korea Basic Science Institute, Daejeon, Republic of Korea

^d Department of Bio & Nano Chemistry, Kookmin University, 861-1, Jeongneung-dong, Seongbuk-gu, Seoul, Republic of Korea

^e Department of Chemistry, Kongju National University, 182 Shinkwan-dong, Kongju-Si, Republic of Korea
E-mail: sangho1130@kongju.ac.kr
Fax: +82 41 8568613
Tel: +82 41 8508492

Abstract

In order to realize copper-based electrode materials for printed electronics applications, it is necessary to control the oxidation reaction during the sintering process. Here we report a novel approach based on the conversion process of cuprous oxide (Cu₂O) nanoparticle aggregates (NPAs) to metallic copper crystals. The NPAs undergo crystal conversion to copper crystals in air with the help of surfactants and a reducing agent. This crystal conversion is a very unique phenomenon which has not been observed previously. The detailed mechanism for this conversion, including the role of the surfactant and crystal growth, was proposed. Furthermore, we tried to realize oxidation free copper electrode formation in air by using the crystal conversion of Cu₂O NPAs.

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Article information

DOI: https://doi.org/10.1039/C1JM10110B
Article type: Paper
Submitted: 08 Jan 2011
Accepted: 11 Mar 2011
First published: 04 Apr 2011

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J. Mater. Chem., 2011,21, 6928-6933

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Crystal-to-crystal conversion of Cu₂O nanoparticles to Cu crystals and applications in printed electronics

W. Lee, Y. S. Lim, S. Kim, J. Jung, Y. Han, S. Yoon, L. Piao and S. Kim, J. Mater. Chem., 2011, 21, 6928 DOI: 10.1039/C1JM10110B

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Journal of Materials Chemistry