A charge pumping technique to identify biomolecular charge polarity using a nanogap embedded biotransistor

作者：Kim Sungho; Kim Jee Yeon; Ahn Jae Hyuk; Park Tae Jung; Lee Sang Yup; Choi Yang Kyu^*

来源：Applied Physics Letters, 2010, 97(7): 073702.

DOI：10.1063/1.3473819

• biological techniques
• biomolecular electronics
• biosensors
• charge pump circuits
• electrical conductivity
• field effect transistors
• molecular biophysics

Charge pumping technique is investigated to identify biomolecular charge polarity using a nanogap-embedded biotransistor. Biomolecules immobilized in a nanogap provide additional charges in the gate dielectric. They give rise to a change in the charge pumping current, as detected by applying a designed pulse waveform. The measured results are analyzed with the aid of numerical simulations. The proposed charge pumping technique represents an insightful method of investigating the electrical properties of biomolecules beyond biosensing.

• 出版日期2010-8-16