Analysis of physical mechanisms for the detection of DNA in carbon nanotube field effect transistors for bio-sensing applications

Carbon nanotubes;Deoxyribonucleic acid (DNA);bio-sensing;mobility

Zhao, Yang ; Liu ; Gang Logan

关键词: Carbon nanotubes;    Deoxyribonucleic acid (DNA);    bio-sensing;    mobility;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/29457/zhao_yang.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

This thesis discusses the use of carbon nanotube field effect transistors as sensors for DNA. It proposes a band-gap modulation as the underlying physical mechanism by which detection occurs. Previous works have established that either Schottky--barrier modulation or electro--static gating are the most significant mechanisms, depending on the particular device. By analyzing field effect mobilities it can be seen that the band-gap modulation effect shows up in every device and can be a reliable means by which detection of hybridized DNA molecules can occur.