relation: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/2920/
title: Quantitative analysis of COOH-terminated alkanethiol SAMs on gold nanoparticle surfaces
creator: Nguyễn, Cường / Kiên
subject: Engineering Physics
subject: ISI-indexed journals
description: Surface-functionalization of a self-assembled monolayer (SAM) can be achieved byintroducing functional molecules   at the terminal. To immobilize biomolecules on a gold  substrate, COOH-terminated alkanethiol SAMs are preferably employed. Thiol molecules adsorption on gold surface was performed using thioglycolic acid (TGA, HS-CH2-COOH) monomers and a self-assembled technique.  Characterization by Fourier transform infrared (FTIR) spectroscopy revealed gold–sulfur (Au–S) bonding through confirming the presence and disappearance of thiol molecules on the Au surface before and after the sample’s immersion in the TGA solution. Moreover, FTIR spectra also proved the presence of carboxyl molecules (C=O; OH) at the free end on the gold nanoparticle (AuNP) surface. Quantitative analysis of the carboxyl molecules interacted with methylene blue (MB) ones, and then identification by UV-Vis absorption spectroscopy showed  that the average density of the carboxyl molecules on the free end of the alkanethiol SAM was about 3.9 × 1014 molecules per cm2    Keywords: Au–S bond, self-assembled monolayer (SAM), thioglycolic acid (TGA), carboxyl molecular density
publisher: IOP Science
date: 2012
type: Article
type: PeerReviewed
format: application/pdf
language: en
identifier: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/2920/1/Quantitative%20analysis%20of%20COOH-terminated%20alkanethiol%20SAMs%20on%20gold%20nanoparticle%20surfaces.pdf
identifier:   Nguyễn, Cường / Kiên  (2012) Quantitative analysis of COOH-terminated alkanethiol SAMs on gold nanoparticle surfaces.  Advances in Natural Sciences: Nanoscience and Nanotechnology, 3  (4).   045008-5 pp.  ISSN 2043-6262     
relation: http://iopscience.iop.org/article/10.1088/2043-6262/3/4/045008