김영호
2018-02-03T04:52:06Z
2018-02-03T04:52:06Z
2011-03
APPLIED SURFACE SCIENCE, v. 257, NO 10, Page. 4650-4654
0169-4332
http://www.sciencedirect.com/science/article/pii/S0169433210018532?via%3Dihub
Si nanowires (SiNWs) were modified by Au nanoparticles (AuNPs) using a self-assembled monolayer of aminopropyltriethoxysilane (APTES) and used for direct sensing of the bovine serum albumin (BSA). It was shown that repeated thermal treatment of the sensor greatly enhanced the reliability of the SiNW sensor by increasing the electrical conductivity largely from carbonization of the APTES molecules and from bringing the AuNPs in intimate contact with the SiNW surface. The AuNP-modified SiNW array sensor was able to detect 1-7 mu M of BSA. The sensor exhibited a good sensitivity over the tested concentration range and linear behavior. It is expected that the proposed label-free biosensor can be further developed to selectively detect and quantify biomolecules other than BSA. (C) 2010 Elsevier B.V. All rights reserved.
This work was supported by a grant (code #: 2010K000356) from the Center for Nanostructured Materials Technology under the "21st Century Frontier R&D Programs" of the Ministry of Science and Technology, Korea.
en
ELSEVIER SCIENCE BV
Amperometric
Silicon nanowire
Gold nanoparticle
Albumin
Electrochemical albumin sensing based on silicon nanowires modified by gold nanoparticles
Article
10
257
10.1016/j.apsusc.2010.12.109
4650-4654
APPLIED SURFACE SCIENCE
Kwon, D. H.
An, H. H.
Kim, H. S.
Lee, J. H.
Suh, S. H.
Kim, Y. H.
Yoon, C. S.
2011200877
S
COLLEGE OF ENGINEERING[S]
DIVISION OF MATERIALS SCIENCE AND ENGINEERING
kimyh