Synthesis, Mass Spectrometry, and Atomic Structural Analysis of Auâ2000(SR)â290 Nanoparticles

Sandra Vergara; Ulises Santiago; Chanaka Kumara; Diego Alducin; Robert L. Whetten; Miguel Jose Yacaman; Amala Dass; Arturo Ponce

doi:10.1021/acs.jpcc.8b08531

Synthesis, Mass Spectrometry, and Atomic Structural Analysis of Au_â2000(SR)_â290 Nanoparticles

Sandra Vergara, Ulises Santiago, Chanaka Kumara, Diego Alducin, Robert L. Whetten, Miguel Jose Yacaman, Amala Dass, Arturo Ponce

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

18 Scopus citations

Abstract

Metallic nanoparticles display unique optical, electronic, and chemical properties compared to their bulk counterparts. These properties are influenced by the internal structure of nanoparticles. Therefore, atomic structural characterization of nanoparticles is of paramount importance in nanotechnology. In this work, we present the synthesis, mass spectrometry, and structural characterization of highly monodisperse thiolate-protected gold nanoparticles (∼3.8 nm) using aberration-corrected scanning transmission electron microscopy (STEM). Mass spectrometry reveals the composition to be Au_∼2000(SC₆H₁₃)_∼290. The images registered in the high-angle annular dark field detector (HAADF-STEM) showed the presence of decahedral and single-crystal face-centered cubic (fcc) nanoparticles as well as fcc structures with multiple planar defects. We also observed nanoparticles with an inner grain boundary corresponding to a high-angle grain boundary classified as Î£9 under the coincidence site lattice notation. Experimental structural analysis and characterization of grain boundaries were correlated with simulated HAADF-STEM images of structural models for Î£9. The present report demonstrates the coexistence of two crystallites within thiolate-protected nanoparticles separated by high-angle grain boundaries.

Original language	English
Pages (from-to)	26733-26738
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	122
Issue number	46
DOIs	https://doi.org/10.1021/acs.jpcc.8b08531
State	Published - Nov 21 2018
Externally published	Yes

Funding

Authors acknowledge technical assistance of the Kleberg Advanced Microscopy Center and the Nanotechnology and Human Health Core at UTSA. We thank the National Center for Research Resources (5 G12RR013646-12), Welch Foundation grant award # AX-1615, and Department of Defense #72489-RT-REP. C.K. and A.D. gratefully acknowledge the support from NSF grant CHE-1255519.

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title = "Synthesis, Mass Spectrometry, and Atomic Structural Analysis of Au{\^a}2000(SR){\^a}290 Nanoparticles",

abstract = "Metallic nanoparticles display unique optical, electronic, and chemical properties compared to their bulk counterparts. These properties are influenced by the internal structure of nanoparticles. Therefore, atomic structural characterization of nanoparticles is of paramount importance in nanotechnology. In this work, we present the synthesis, mass spectrometry, and structural characterization of highly monodisperse thiolate-protected gold nanoparticles (∼3.8 nm) using aberration-corrected scanning transmission electron microscopy (STEM). Mass spectrometry reveals the composition to be Au∼2000(SC6H13)∼290. The images registered in the high-angle annular dark field detector (HAADF-STEM) showed the presence of decahedral and single-crystal face-centered cubic (fcc) nanoparticles as well as fcc structures with multiple planar defects. We also observed nanoparticles with an inner grain boundary corresponding to a high-angle grain boundary classified as {\^I}£9 under the coincidence site lattice notation. Experimental structural analysis and characterization of grain boundaries were correlated with simulated HAADF-STEM images of structural models for {\^I}£9. The present report demonstrates the coexistence of two crystallites within thiolate-protected nanoparticles separated by high-angle grain boundaries.",

author = "Sandra Vergara and Ulises Santiago and Chanaka Kumara and Diego Alducin and Whetten, {Robert L.} and {Jose Yacaman}, Miguel and Amala Dass and Arturo Ponce",

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AU - Vergara, Sandra

AU - Santiago, Ulises

AU - Kumara, Chanaka

AU - Alducin, Diego

AU - Whetten, Robert L.

AU - Jose Yacaman, Miguel

AU - Dass, Amala

AU - Ponce, Arturo

PY - 2018/11/21

Y1 - 2018/11/21

N2 - Metallic nanoparticles display unique optical, electronic, and chemical properties compared to their bulk counterparts. These properties are influenced by the internal structure of nanoparticles. Therefore, atomic structural characterization of nanoparticles is of paramount importance in nanotechnology. In this work, we present the synthesis, mass spectrometry, and structural characterization of highly monodisperse thiolate-protected gold nanoparticles (∼3.8 nm) using aberration-corrected scanning transmission electron microscopy (STEM). Mass spectrometry reveals the composition to be Au∼2000(SC6H13)∼290. The images registered in the high-angle annular dark field detector (HAADF-STEM) showed the presence of decahedral and single-crystal face-centered cubic (fcc) nanoparticles as well as fcc structures with multiple planar defects. We also observed nanoparticles with an inner grain boundary corresponding to a high-angle grain boundary classified as Î£9 under the coincidence site lattice notation. Experimental structural analysis and characterization of grain boundaries were correlated with simulated HAADF-STEM images of structural models for Î£9. The present report demonstrates the coexistence of two crystallites within thiolate-protected nanoparticles separated by high-angle grain boundaries.

AB - Metallic nanoparticles display unique optical, electronic, and chemical properties compared to their bulk counterparts. These properties are influenced by the internal structure of nanoparticles. Therefore, atomic structural characterization of nanoparticles is of paramount importance in nanotechnology. In this work, we present the synthesis, mass spectrometry, and structural characterization of highly monodisperse thiolate-protected gold nanoparticles (∼3.8 nm) using aberration-corrected scanning transmission electron microscopy (STEM). Mass spectrometry reveals the composition to be Au∼2000(SC6H13)∼290. The images registered in the high-angle annular dark field detector (HAADF-STEM) showed the presence of decahedral and single-crystal face-centered cubic (fcc) nanoparticles as well as fcc structures with multiple planar defects. We also observed nanoparticles with an inner grain boundary corresponding to a high-angle grain boundary classified as Î£9 under the coincidence site lattice notation. Experimental structural analysis and characterization of grain boundaries were correlated with simulated HAADF-STEM images of structural models for Î£9. The present report demonstrates the coexistence of two crystallites within thiolate-protected nanoparticles separated by high-angle grain boundaries.

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JO - Journal of Physical Chemistry C

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ER -

Synthesis, Mass Spectrometry, and Atomic Structural Analysis of Au_â2000(SR)_â290 Nanoparticles

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