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Title: Comparison of Decanethiolate Gold Nanoparticles Synthesized by One-Phase and Two-Phase Methods

Abstract

We investigated the differences between the decanethiolate gold nanoparticles synthesized by two different routes: one-phase and two-phase methods. Their properties were compared in bulk and at the air-water interface by transmission electron microscopy (TEM), X-ray reflectivity (XR), extended X-ray absorption fine structure (EXAFS) spectroscopy, X-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), time-of-flight secondary-ion mass spectrometry (TOF-SIMS), electron paramagnetic resonance (EPR), and Langmuir-Blodgett technique. The mean nanoparticles sizes obtained by EXAFS and XRD were found to be smaller than those by the TEM measurements. We explained these differences by the structural disorder and multiple twinning in the nanoparticles. The one-phase particles were found by EXAFS to be smaller and had a higher grafting density of thiol chains than the two-phase particles. We attributed these differences to the enhanced disorder of the one-phase particles. At the air-water interface, the one-phase particles did not spread, while the two-phase particles spread and formed Langmuir films. TEM and XR results revealed that the close-packed monolayer of the two-phase particles collapsed and folded into multilayer films upon further compression.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
930163
Report Number(s):
BNL-80821-2008-JA
TRN: US200822%%1213
DOE Contract Number:
DE-AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Physical Chemistry B; Journal Volume: 110
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; GOLD COMPOUNDS; ORGANIC SULFUR COMPOUNDS; NANOSTRUCTURES; SYNTHESIS; COMPARATIVE EVALUATIONS; TWINNING; national synchrotron light source

Citation Formats

Sun,Y., Frenkel, A., White, H., Zhang, L., Zhu, Y., Xu, H., Yang, J., Koga, T., Zaitsev, V., and et al. Comparison of Decanethiolate Gold Nanoparticles Synthesized by One-Phase and Two-Phase Methods. United States: N. p., 2006. Web. doi:10.1021/jp060432h.
Sun,Y., Frenkel, A., White, H., Zhang, L., Zhu, Y., Xu, H., Yang, J., Koga, T., Zaitsev, V., & et al. Comparison of Decanethiolate Gold Nanoparticles Synthesized by One-Phase and Two-Phase Methods. United States. doi:10.1021/jp060432h.
Sun,Y., Frenkel, A., White, H., Zhang, L., Zhu, Y., Xu, H., Yang, J., Koga, T., Zaitsev, V., and et al. Sun . "Comparison of Decanethiolate Gold Nanoparticles Synthesized by One-Phase and Two-Phase Methods". United States. doi:10.1021/jp060432h.
@article{osti_930163,
title = {Comparison of Decanethiolate Gold Nanoparticles Synthesized by One-Phase and Two-Phase Methods},
author = {Sun,Y. and Frenkel, A. and White, H. and Zhang, L. and Zhu, Y. and Xu, H. and Yang, J. and Koga, T. and Zaitsev, V. and et al.},
abstractNote = {We investigated the differences between the decanethiolate gold nanoparticles synthesized by two different routes: one-phase and two-phase methods. Their properties were compared in bulk and at the air-water interface by transmission electron microscopy (TEM), X-ray reflectivity (XR), extended X-ray absorption fine structure (EXAFS) spectroscopy, X-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), time-of-flight secondary-ion mass spectrometry (TOF-SIMS), electron paramagnetic resonance (EPR), and Langmuir-Blodgett technique. The mean nanoparticles sizes obtained by EXAFS and XRD were found to be smaller than those by the TEM measurements. We explained these differences by the structural disorder and multiple twinning in the nanoparticles. The one-phase particles were found by EXAFS to be smaller and had a higher grafting density of thiol chains than the two-phase particles. We attributed these differences to the enhanced disorder of the one-phase particles. At the air-water interface, the one-phase particles did not spread, while the two-phase particles spread and formed Langmuir films. TEM and XR results revealed that the close-packed monolayer of the two-phase particles collapsed and folded into multilayer films upon further compression.},
doi = {10.1021/jp060432h},
journal = {Journal of Physical Chemistry B},
number = ,
volume = 110,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}
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