Adsorption Reaction of L-Cysteine on Au Nanoparticle Prepared by Solution Plasma

C. Tsukada; T. Mizutani; S. Ogawa; T. Nomoto; Y. Abe; H. Nameki; K. Matsuo; G. Kutluk; S. Yagi

doi:10.1380/ejssnt.2013.18

Conference -ICSFS-16-

Adsorption Reaction of L-Cysteine on Au Nanoparticle Prepared by Solution Plasma

C. Tsukada, T. Mizutani, S. Ogawa, T. Nomoto, Y. Abe, H. Nameki, K. Matsuo, G. Kutluk, S. Yagi

Author information

C. Tsukada
Department of Quantum Engineering, Graduate School of Engineering, Nagoya University, Japan
T. Mizutani
Department of Quantum Engineering, Graduate School of Engineering, Nagoya University, Japan
S. Ogawa
Department of Quantum Engineering, Graduate School of Engineering, Nagoya University, Japan
T. Nomoto
Aichi Center for Industry and Science Technology, Japan
Y. Abe
Aichi Center for Industry and Science Technology, Japan
H. Nameki
Aichi Center for Industry and Science Technology, Japan
K. Matsuo
Synchrotron Radiation Center, Hiroshima University, Japan
G. Kutluk
Synchrotron Radiation Center, Hiroshima University, Japan
S. Yagi
Department of Quantum Engineering, Graduate School of Engineering, Nagoya University, Japan
Synchrotron Radiation Center, Hiroshima University, Japan
EcoTopia Science Institute, Nagoya University, Japan

Keywords: Near edge extended X-ray absorption fine structure (NEXAFS), Chemisorption, Surface chemical reaction, Nano-particles, quantum dots, and supra-molecules, Nanostructure chemistry, processing and fabrication

JOURNAL FREE ACCESS

2013 Volume 11 Pages 18-24

DOI https://doi.org/10.1380/ejssnt.2013.18

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Abstract

We have investigated the L-cysteine adsorption reaction on the Au nanoparticles (NPs) prepared by means of the solution plasma method. The particle size of the Au NPs is estimated to be 2.4±1.0 nm as prepared. When the L-cysteine adds into the Au NPs colloidal solution, the solution color is quickly changed from red to dark blue. It is found that the adsorbates of L-cysteine thiolate, cystine and atomic sulfur exist on the Au NPs surface by sulfur K-edge NEXAFS. In addition, the Au NPs aggregate each other by the hydrogen bonding at carboxyl groups and produce the black colored precipitate. In this paper, we have revealed the adsorption behavior of the L-cysteine on the Au NPs by AFM, UV-vis, ζ-potential measurement and NEXAFS techniques. [DOI: 10.1380/ejssnt.2013.18]

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