Conformational study of citrates adsorbed on gold nanoparticles using fourier transform infrared spectroscopy

Priastuti Wulandari; Xinheng Li; Kaoru Tamada; Masahiko Hara

doi:10.1142/S0218863508004032

Conformational study of citrates adsorbed on gold nanoparticles using fourier transform infrared spectroscopy

Priastuti Wulandari, Xinheng Li, Kaoru Tamada, Masahiko Hara

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26 Citations (Scopus)

Abstract

We investigated the structure of citrates adsorbed on Au nanoparticles (AuNPs) synthesized by the Frens method by Fourier transformed infrared spectroscopy (FTIR). We found that physisorbed citrates are stable enough to stay on the surface of AuNPs during purification. The FT-IR spectra of citrates on AuNPs are quite uniquely different from bulk citrates, suggesting the formation of coordination bond between carboxylate group and gold. The shifts of carboxylate vibration modes on AuNPs are larger than that on flat Au substrates, as expected from the stronger dipole field on AuNPs compared with that on flat substrates.

Original language	English
Pages (from-to)	185-192
Number of pages	8
Journal	Journal of Nonlinear Optical Physics and Materials
Volume	17
Issue number	2
DOIs	https://doi.org/10.1142/S0218863508004032
Publication status	Published - Jan 1 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Physics and Astronomy (miscellaneous)

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10.1142/S0218863508004032

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abstract = "We investigated the structure of citrates adsorbed on Au nanoparticles (AuNPs) synthesized by the Frens method by Fourier transformed infrared spectroscopy (FTIR). We found that physisorbed citrates are stable enough to stay on the surface of AuNPs during purification. The FT-IR spectra of citrates on AuNPs are quite uniquely different from bulk citrates, suggesting the formation of coordination bond between carboxylate group and gold. The shifts of carboxylate vibration modes on AuNPs are larger than that on flat Au substrates, as expected from the stronger dipole field on AuNPs compared with that on flat substrates.",

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AU - Wulandari, Priastuti

AU - Li, Xinheng

AU - Tamada, Kaoru

AU - Hara, Masahiko

PY - 2008/1/1

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AB - We investigated the structure of citrates adsorbed on Au nanoparticles (AuNPs) synthesized by the Frens method by Fourier transformed infrared spectroscopy (FTIR). We found that physisorbed citrates are stable enough to stay on the surface of AuNPs during purification. The FT-IR spectra of citrates on AuNPs are quite uniquely different from bulk citrates, suggesting the formation of coordination bond between carboxylate group and gold. The shifts of carboxylate vibration modes on AuNPs are larger than that on flat Au substrates, as expected from the stronger dipole field on AuNPs compared with that on flat substrates.

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Conformational study of citrates adsorbed on gold nanoparticles using fourier transform infrared spectroscopy

Abstract

All Science Journal Classification (ASJC) codes

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