High-Tc superconducting thin film from bismuth cuprate nano-colloids

Jae Joon Chang, Eue Soon Jang, Byeong Hyeok Sohn, Seong Ju Hwang, Jin Ho Choy

Research output: Contribution to journalConference article

7 Citations (Scopus)


With the colloidal suspension of superconducting nanoparticles as a precursor, we have successfully fabricated well-oriented high-Tc superconducting Bi2Sr2CaCu2Oy films by an electrophoretic deposition method. The colloidal suspension of superconducting nanoparticles can be prepared by the exfoliation of Bi-based cuprates through the intercalation of long chain organic molecules. According to zeta potential measurement, the surface of the resulting nanosheets in an acetone solvent is positively charged with a potential of + 25 mV. Such a presence of surface charge allows us to apply the electrophoretic deposition process with a silver metal substrate. A post-annealing process for the as-deposited film improves significantly the electrical connectivity and the c-axis alignment of the superconductor grains. The thickness of the resulting films can be easily tuned by the control of deposition conditions such as an applied electrical potential and a deposition time.

Original languageEnglish
Pages (from-to)78-81
Number of pages4
JournalThin Solid Films
Issue number1-2
Publication statusPublished - 2006 Jan 20

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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