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 language | English |
---|---|
Pages (from-to) | 2321-2324 |
Number of pages | 4 |
Journal | Materials Letters |
Volume | 64 |
Issue number | 21 |
DOIs | |
Publication status | Published - 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