Synthesis of oxidation-resistant core-shell copper nanoparticles

Inhyuk Kim, Youngwoo Kim, Kyoohee Woo, Eui Hyun Ryu, Kyung Yol Yon, Guozhong Cao, Joo Ho Moon

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

We present a simple method to synthesize non-oxidizable copper nanoparticles surrounded by copper formate. The formation of the core-shell nanoparticles was achieved via surface reaction induced by the injection of formic acid on the preformed core particles. High resolution transmission electron microscopy revealed that copper particles with a diameter of 77 nm are conformally surrounded by a 5 nm thick layer of copper formate, which prevents oxidation of the copper. This non-metallic shell was readily reduced to Cu during low temperature annealing without leaving behind organic residues, resulting in highly conductive films with a resistivity of 13.5 μΩ cm after annealing at 250°C for 1 h in nitrogen. Time- and temperature- dependent sheet resistance measurements demonstrated that the resistivity of the core-shell nanoparticle films will double after exposure to an ambient atmosphere at room temperature for 27 years. Our core-shell Cu nanoparticles are a promising and cost-effective alternative to silver nanoparticles for the efficient production of printed conductors with enhanced chemical stability.

Original languageEnglish
Pages (from-to)15169-15177
Number of pages9
JournalRSC Advances
Volume3
Issue number35
DOIs
Publication statusPublished - 2013 Sep 21

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formic acid
Copper
Nanoparticles
Oxidation
Annealing
Conductive films
Formic acid
Sheet resistance
Chemical stability
Surface reactions
High resolution transmission electron microscopy
Silver
Temperature
Nitrogen
Costs

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Kim, I., Kim, Y., Woo, K., Ryu, E. H., Yon, K. Y., Cao, G., & Moon, J. H. (2013). Synthesis of oxidation-resistant core-shell copper nanoparticles. RSC Advances, 3(35), 15169-15177. https://doi.org/10.1039/c3ra41480a
Kim, Inhyuk ; Kim, Youngwoo ; Woo, Kyoohee ; Ryu, Eui Hyun ; Yon, Kyung Yol ; Cao, Guozhong ; Moon, Joo Ho. / Synthesis of oxidation-resistant core-shell copper nanoparticles. In: RSC Advances. 2013 ; Vol. 3, No. 35. pp. 15169-15177.
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Kim, I, Kim, Y, Woo, K, Ryu, EH, Yon, KY, Cao, G & Moon, JH 2013, 'Synthesis of oxidation-resistant core-shell copper nanoparticles', RSC Advances, vol. 3, no. 35, pp. 15169-15177. https://doi.org/10.1039/c3ra41480a

Synthesis of oxidation-resistant core-shell copper nanoparticles. / Kim, Inhyuk; Kim, Youngwoo; Woo, Kyoohee; Ryu, Eui Hyun; Yon, Kyung Yol; Cao, Guozhong; Moon, Joo Ho.

In: RSC Advances, Vol. 3, No. 35, 21.09.2013, p. 15169-15177.

Research output: Contribution to journalArticle

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Kim I, Kim Y, Woo K, Ryu EH, Yon KY, Cao G et al. Synthesis of oxidation-resistant core-shell copper nanoparticles. RSC Advances. 2013 Sep 21;3(35):15169-15177. https://doi.org/10.1039/c3ra41480a