光电子学
电极
晶体管
电容
量子点
电导
电场
库仑阻塞
作者
Sungho Kim,Jae-Hyuk Ahn,Tae Jung Park,Sang Yup Lee,Yang‐Kyu Choi
摘要
A unique direct electrical detection method of biomolecules, charge pumping, was demonstrated using a nanogap embedded field-effect-transistor (FET). With aid of a charge pumping method, sensitivity can fall below the 1 ng/ml concentration regime in antigen-antibody binding of an avian influenza case. Biomolecules immobilized in the nanogap are mainly responsible for the acute changes of the interface trap density due to modulation of the energy level of the trap. This finding is supported by a numerical simulation. The proposed detection method for biomolecules using a nanogap embedded FET represents a foundation for a chip-based biosensor capable of high sensitivity.
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