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

Title
High-Tc superconducting thin film from bismuth cuprate nano-colloids
Authors
Chang J.-J.Jang E.-S.Sohn B.-H.Hwang S.-J.Choy J.-H.
Ewha Authors
최진호황성주
SCOPUS Author ID
최진호scopus; 황성주scopus
Issue Date
2006
Journal Title
Thin Solid Films
ISSN
0040-6090JCR Link
Citation
Thin Solid Films vol. 495, no. 1-2, pp. 78 - 81
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Conference Paper
Abstract
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. © 2005 Elsevier B.V. All rights reserved.
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DOI
10.1016/j.tsf.2005.08.304
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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