Fabrication of calcium ion sensitive diamond field effect transistors (FETs) based on immobilized calmodulin

Jung Hoon Yang, Munenori Degawa, Kwang Soup Song, Chunlei Wang, Hiroshi Kawarada

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We have developed calcium (Ca2+) ion sensitive solution-gate field effect transistors (SGFETs) on polycrystalline diamond by using partial amination and immobilization of calmodulin (CaM), a specific protein to calcium ions. The CaM is covalently immobilized on functionalized diamond surface, and the functionalized surface was analyzed by X-ray photoelectron spectroscopy, respectively. Also, the high performance of the CaM-immobilized diamond SGFET for detecting Ca2+ were studied with respect to high selectivity and sensitivity in various concentrations and pH.

Original languageEnglish
Pages (from-to)2321-2324
Number of pages4
JournalMaterials Letters
Volume64
Issue number21
DOIs
Publication statusPublished - 2010 Nov 15

Keywords

  • Calcium ion sensor
  • Calmodulin
  • Diamond FET
  • Functionalization

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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