Kwon, Dae Hoon An, Hyeun Hwan Kim, Hee-Soo Lee, Jong Ho Suh, Sang Hee Kim, Young Ho Yoon, Chong Seung 2024-01-20T17:31:24Z 2024-01-20T17:31:24Z 2021-09-02 2011-03-01 0169-4332 https://pubs.kist.re.kr/handle/201004/130541 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. English ELSEVIER GLUCOSE-OXIDASE IMMOBILIZATION FERRICYANIDE NANOTUBES Electrochemical albumin sensing based on silicon nanowires modified by gold nanoparticles Article 10.1016/j.apsusc.2010.12.109 1 APPLIED SURFACE SCIENCE, v.257, no.10, pp.4650 - 4654 APPLIED SURFACE SCIENCE 257 10 4650 4654 scie scopus 000286808300021 2-s2.0-79551545867 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article GLUCOSE-OXIDASE IMMOBILIZATION FERRICYANIDE NANOTUBES Amperometric Silicon nanowire Gold nanoparticle Albumin APTES