Hidenori Okuzaki
Interdisciplinary Graduate Schools of Medicine and Engineering,
4-4-37 Takeda, Kofu 400-8511
Japan
Research Article
Single-Walled-Carbon-Nanotube-Based Field-Effect Transistors with Biosensing Functions for Prostate-Specific-Antigen
Author(s): Hu Yan, Yuta Mochizuki, Toshihiko Jo and Hidenori OkuzakiHu Yan, Yuta Mochizuki, Toshihiko Jo and Hidenori Okuzaki
Single-walled carbon nanotube (SWCNT) field-effect transistors (FETs) were fabricated on strontium titanate (SrTiO3) substrate through a wet-process by using amide-functionalized SWCNT. The SWCNT-FET exhibited good gate-modulation for drain current at low operating voltages (-3 V). The hole mobility was 0.19 cm2/Vs with an on/ off current ratio of 1.3. After immobilization of prostate-specific-antigen (PSA) antibody the SWCNT-FET clearly responded against the PSA. The drain current at -3 V of both drain and gate voltage almost linearly increased with increasing the concentration of the PSA.
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DOI:
10.4172/jbb.1000061