Research Update: Nanoscale surface potential analysis of MoS2 field-effect transistors for biomolecular detection using Kelvin probe force microscopy

Title
Research Update: Nanoscale surface potential analysis of MoS2 field-effect transistors for biomolecular detection using Kelvin probe force microscopy
Authors
남기환김민형박희경이형빈정석환Inturu Omkaram윤대성이세영김선국이상우
Issue Date
2016-10
Publisher
APL materials
Citation
VOL 4, NO 10, 100701
Abstract
We used high-resolution Kelvin probe force microscopy (KPFM) to investigate the immobilization of a prostate specific antigen (PSA) antibody by measuring the surface potential (SP) on a MoS2 surface over an extensive concentration range (1 pg/ml– 100 μg/ml). After PSA antibody immobilization, we demonstrated that the SP on the MoS2 surface characterized by KPFM strongly correlated to the electrical signal of a MoS2 bioFET. This demonstration can not only be used to optimize the immobilization conditions for captured molecules, but can also be applied as a diagnostic tool to complement the electrical detection of a MoS2 FET biosensor.
URI
http://pubs.kist.re.kr/handle/201004/64864
ISSN
2166-532X
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KIST Publication > Article
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