Electrochemical and SEM characterization of gold-coated stents in vitro

Chun Che Shih, Chun Ming Shih, Kuang Yi Chou, Shing Jong Lin, Yea Yang Su

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The inert properties of gold make it a useful material for implants. Gold was applied as a coating on 316L stainless steel stents to improve the radiopacity and to provide better thrombogenic resistance and a lower degree of restenosis after deployment. Reports of clinical trials using gold-coated stents showed controversial results. A detailed examination of gold-coated stents was designed to understand the influence of surface conditions on the electrochemical properties in vitro. Corrosion resistance of gold-coated stents was investigated by cyclic polarization, and potentiostatic control. Surface morphologies of gold-coated stents in as-received condition, postinflated condition, and after cyclic polarization were characterized by scanning electron spectroscopy (SES). X-ray mapping identified elemental distribution. Results found severe defects in the gold-coating in the as-received condition, cracks and wrinkles on inflated gold-coated stents, and severe corrosion after cyclic polarization. Leaching of metallic ions in Ringer's solution was possible.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume154
Issue number6
DOIs
Publication statusPublished - 2007

Fingerprint

Stents
Gold
gold
Scanning electron microscopy
scanning electron microscopy
Polarization
polarization
Gold coatings
gold coatings
Electron spectroscopy
Stainless Steel
leaching
Electrochemical properties
corrosion resistance
Leaching
Surface morphology
electron spectroscopy
Corrosion resistance
stainless steels
corrosion

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Electrochemical and SEM characterization of gold-coated stents in vitro. / Shih, Chun Che; Shih, Chun Ming; Chou, Kuang Yi; Lin, Shing Jong; Su, Yea Yang.

In: Journal of the Electrochemical Society, Vol. 154, No. 6, 2007.

Research output: Contribution to journalArticle

Shih, Chun Che ; Shih, Chun Ming ; Chou, Kuang Yi ; Lin, Shing Jong ; Su, Yea Yang. / Electrochemical and SEM characterization of gold-coated stents in vitro. In: Journal of the Electrochemical Society. 2007 ; Vol. 154, No. 6.
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