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.
Original language | English |
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Article number | 100701 |
Journal | APL Materials |
Volume | 4 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2016 Oct 1 |
Bibliographical note
Publisher Copyright:© 2016 Author(s).
ASJC Scopus subject areas
- General Materials Science
- General Engineering