LIGHT-SENSITIVE SILICON NANOWIRE ARRAY FIELD EFFECT TRANSISTOR FOR GLUCOSE DETECTION

Abstract

We report on the sensitive detection of glucose using silicon nanowire array field-effect-transistor ( SiNW -FET) upon illumination. The uniformly distributed and size-controlled SiNWs were fabricated by "top-down" approach. The fabricated SiNW -FET device was evaluated for detection of glucose in the range of 100–900 mg/dL. The SiNW -FET shows enhanced sensitivity of 0.988 ± 0.030 nA (mg/dl)-1 upon illumination at 480 nm light as compared to without illumination as 0.486 ± 0.014 nA (mg/dL)-1. The presented SiNW -FET device is fast, stable and sensitive to light as well as to bio analyte, and hence can be utilized as sensitive biological sensing platform.