Spectroscopic identification of SAu interaction in cysteine capped gold nanoparticles

Santosh Aryal; B. K.C. Remant; N. Dharmaraj; Narayan Bhattarai; Chi Hun Kim; Hak Yong Kim

doi:10.1016/j.saa.2005.04.048

Spectroscopic identification of SAu interaction in cysteine capped gold nanoparticles

Santosh Aryal, B. K.C. Remant, N. Dharmaraj, Narayan Bhattarai, Chi Hun Kim, Hak Yong Kim

Houston Methodist

Research output: Contribution to journal › Article › peer-review

274 Scopus citations

Abstract

This study deals with the synthesis of cysteine capped gold nanoparticles with an average size of 12 nm by borohydride reduction and spectroscopic identification of SAu interaction. We have studied the interaction of thiol with gold nanoparticles in aqueous medium by employing UV-vis, Raman, NMR, and FT-IR spectroscopy. The shifting of gold plasmon resonance in the UV-vis spectra shows the stabilization of gold nanoparticles by cysteine. The disappearance of SH stretching in both the IR and Raman spectra and the shifting of the NMR signals of the protons in close proximity to the metal center supported the existence of the SAu interaction in cysteine capped gold nanoparticles. The TEM images shows cysteine capped gold nanoparticles as distinct and spherical entities as compared to free colloidal gold nanoparticles.

Original language	English (US)
Pages (from-to)	160-163
Number of pages	4
Journal	Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume	63
Issue number	1
DOIs	https://doi.org/10.1016/j.saa.2005.04.048
State	Published - Jan 2006

Keywords

Cysteine
Gold nanoparticles
Stabilization
Thiols

ASJC Scopus subject areas

Spectroscopy

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10.1016/j.saa.2005.04.048

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title = "Spectroscopic identification of SAu interaction in cysteine capped gold nanoparticles",

abstract = "This study deals with the synthesis of cysteine capped gold nanoparticles with an average size of 12 nm by borohydride reduction and spectroscopic identification of SAu interaction. We have studied the interaction of thiol with gold nanoparticles in aqueous medium by employing UV-vis, Raman, NMR, and FT-IR spectroscopy. The shifting of gold plasmon resonance in the UV-vis spectra shows the stabilization of gold nanoparticles by cysteine. The disappearance of SH stretching in both the IR and Raman spectra and the shifting of the NMR signals of the protons in close proximity to the metal center supported the existence of the SAu interaction in cysteine capped gold nanoparticles. The TEM images shows cysteine capped gold nanoparticles as distinct and spherical entities as compared to free colloidal gold nanoparticles.",

keywords = "Cysteine, Gold nanoparticles, Stabilization, Thiols",

author = "Santosh Aryal and Remant, {B. K.C.} and N. Dharmaraj and Narayan Bhattarai and Kim, {Chi Hun} and Kim, {Hak Yong}",

note = "Funding Information: This research was supported by the Korean Ministry of Science and Technology through the Center for Healthcare Technology Development. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.saa.2005.04.048",

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AU - Remant, B. K.C.

AU - Dharmaraj, N.

AU - Bhattarai, Narayan

AU - Kim, Chi Hun

AU - Kim, Hak Yong

N1 - Funding Information: This research was supported by the Korean Ministry of Science and Technology through the Center for Healthcare Technology Development. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2006/1

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N2 - This study deals with the synthesis of cysteine capped gold nanoparticles with an average size of 12 nm by borohydride reduction and spectroscopic identification of SAu interaction. We have studied the interaction of thiol with gold nanoparticles in aqueous medium by employing UV-vis, Raman, NMR, and FT-IR spectroscopy. The shifting of gold plasmon resonance in the UV-vis spectra shows the stabilization of gold nanoparticles by cysteine. The disappearance of SH stretching in both the IR and Raman spectra and the shifting of the NMR signals of the protons in close proximity to the metal center supported the existence of the SAu interaction in cysteine capped gold nanoparticles. The TEM images shows cysteine capped gold nanoparticles as distinct and spherical entities as compared to free colloidal gold nanoparticles.

AB - This study deals with the synthesis of cysteine capped gold nanoparticles with an average size of 12 nm by borohydride reduction and spectroscopic identification of SAu interaction. We have studied the interaction of thiol with gold nanoparticles in aqueous medium by employing UV-vis, Raman, NMR, and FT-IR spectroscopy. The shifting of gold plasmon resonance in the UV-vis spectra shows the stabilization of gold nanoparticles by cysteine. The disappearance of SH stretching in both the IR and Raman spectra and the shifting of the NMR signals of the protons in close proximity to the metal center supported the existence of the SAu interaction in cysteine capped gold nanoparticles. The TEM images shows cysteine capped gold nanoparticles as distinct and spherical entities as compared to free colloidal gold nanoparticles.

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KW - Gold nanoparticles

KW - Stabilization

KW - Thiols

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Spectroscopic identification of SAu interaction in cysteine capped gold nanoparticles

Abstract

Keywords

ASJC Scopus subject areas

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