Effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridization

Effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridization

A single-walled carbon nanotube (SWCNT) in a field-effect transistor (FET) configuration provides an ideal electronic path for label-free detection of nucleic acid hybridization. The simultaneous influence of more than one response mechanism in hybridization detection causes a variation in electrica...

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Main Authors: Hari Krishna Salila Vijayalal Mohan, Jianing An, Yani Zhang, Chee How Wong, Lianxi Zheng
Format: Article
Language:English
Published: Beilstein-Institut 2014-11-01
Series:Beilstein Journal of Nanotechnology
Subjects:
biosensor
carbon nanotubes
channel length
field-effect transistor
hybridization
mobility
nucleic acid
Online Access:https://doi.org/10.3762/bjnano.5.217
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spelling doaj-c6180078bb0e4fd6b4d1fbe37a56116c2020-11-25T00:45:15ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862014-11-01512081209110.3762/bjnano.5.2172190-4286-5-217Effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridizationHari Krishna Salila Vijayalal Mohan0Jianing An1Yani Zhang2Chee How Wong3Lianxi Zheng4School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, SingaporeSchool of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, SingaporeTemasek Laboratories, Nanyang Technological University, 50 Nanyang Avenue, 639798, SingaporeSchool of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, SingaporeSchool of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, SingaporeA single-walled carbon nanotube (SWCNT) in a field-effect transistor (FET) configuration provides an ideal electronic path for label-free detection of nucleic acid hybridization. The simultaneous influence of more than one response mechanism in hybridization detection causes a variation in electrical parameters such as conductance, transconductance, threshold voltage and hysteresis gap. The channel length (L) dependence of each of these parameters necessitates the need to include them when interpreting the effect of L on the response to hybridization. Using the definitions of intrinsic effective mobility (µe) and device field-effect mobility (µf), two new parameters were defined to interpret the effect of L on the FET response to hybridization. Our results indicate that FETs with ≈300 µm long SWCNT exhibited the most appreciable response to hybridization, which complied with the variation trend in response to the newly defined parameters.https://doi.org/10.3762/bjnano.5.217biosensorcarbon nanotubeschannel lengthfield-effect transistorhybridizationmobilitynucleic acid
collection DOAJ
language English
format Article
sources DOAJ
author Hari Krishna Salila Vijayalal Mohan
Jianing An
Yani Zhang
Chee How Wong
Lianxi Zheng
spellingShingle Hari Krishna Salila Vijayalal Mohan
Jianing An
Yani Zhang
Chee How Wong
Lianxi Zheng
Effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridization
Beilstein Journal of Nanotechnology
biosensor
carbon nanotubes
channel length
field-effect transistor
hybridization
mobility
nucleic acid
author_facet Hari Krishna Salila Vijayalal Mohan
Jianing An
Yani Zhang
Chee How Wong
Lianxi Zheng
author_sort Hari Krishna Salila Vijayalal Mohan
title Effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridization
title_short Effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridization
title_full Effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridization
title_fullStr Effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridization
title_full_unstemmed Effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridization
title_sort effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridization
publisher Beilstein-Institut
series Beilstein Journal of Nanotechnology
issn 2190-4286
publishDate 2014-11-01
description A single-walled carbon nanotube (SWCNT) in a field-effect transistor (FET) configuration provides an ideal electronic path for label-free detection of nucleic acid hybridization. The simultaneous influence of more than one response mechanism in hybridization detection causes a variation in electrical parameters such as conductance, transconductance, threshold voltage and hysteresis gap. The channel length (L) dependence of each of these parameters necessitates the need to include them when interpreting the effect of L on the response to hybridization. Using the definitions of intrinsic effective mobility (µe) and device field-effect mobility (µf), two new parameters were defined to interpret the effect of L on the FET response to hybridization. Our results indicate that FETs with ≈300 µm long SWCNT exhibited the most appreciable response to hybridization, which complied with the variation trend in response to the newly defined parameters.
topic biosensor
carbon nanotubes
channel length
field-effect transistor
hybridization
mobility
nucleic acid
url https://doi.org/10.3762/bjnano.5.217
work_keys_str_mv AT harikrishnasalilavijayalalmohan effectofchannellengthontheelectricalresponseofcarbonnanotubefieldeffecttransistorstodeoxyribonucleicacidhybridization
AT jianingan effectofchannellengthontheelectricalresponseofcarbonnanotubefieldeffecttransistorstodeoxyribonucleicacidhybridization
AT yanizhang effectofchannellengthontheelectricalresponseofcarbonnanotubefieldeffecttransistorstodeoxyribonucleicacidhybridization
AT cheehowwong effectofchannellengthontheelectricalresponseofcarbonnanotubefieldeffecttransistorstodeoxyribonucleicacidhybridization
AT lianxizheng effectofchannellengthontheelectricalresponseofcarbonnanotubefieldeffecttransistorstodeoxyribonucleicacidhybridization
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