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Electrical Detection of Femtomolar DNA via Gold‐Nanoparticle Enhancement in Carbon‐Nanotube‐Network Field‐Effect Transistors
Author(s) -
Dong Xiaochen,
Lau Ching Man,
Lohani Anup,
Mhaisalkar Subodh G.,
Kasim Johnson,
Shen Zexiang,
Ho Xinning,
Rogers John A.,
Li LainJong
Publication year - 2008
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200702798
Subject(s) - carbon nanotube , materials science , nanotechnology , field effect transistor , colloidal gold , nanoparticle , dna , transistor , carbon nanotube field effect transistor , dna–dna hybridization , optoelectronics , chemistry , electrical engineering , biochemistry , engineering , voltage
A dramatic sensitivity enhancement in electrical detection of DNA hybridization using single‐walled carbon nanotube networked field effect transistors (SNFETs) via introducing reporter DNA‐Au nanoparticle (AuNP) conjugates in the hybridization step is reported. The amplified change in drain current allows to reliably determine the DNA concentration down to ∼100 fM.