Structure and Dimensions of Gold Clusters in Cucurbit[n]uril (CB[n], n = 6, 7) Cavities Full article
Journal |
Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques
ISSN: 1027-4510 , E-ISSN: 1819-7094 |
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Output data | Year: 2015, Volume: 9, Number: 5, Pages: 1031-1038 Pages count : 8 DOI: 10.1134/S1027451015050262 | ||||||||||
Tags | cucurbituril, gold nanoparticles, high-resolution transmission electron microscopy, XAFS spectroscopy | ||||||||||
Authors |
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Affiliations |
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Funding (1)
1 | Russian Foundation for Basic Research | 12-02-00262 (01201258413) |
Abstract:
The AuL 3 XAFS spectra of gold nanoparticles in cavities of cucurbit[6,7]uril are measured. Gold clusters are found to be characterized by smaller (by 0.03 Å) interatomic distances and a considerable reduction in the Au–Au coordination numbers (N Au–Au ≤ 6) as compared with bulk gold. For all samples, the size distribution of Au nanoparticles is established to have two maxima corresponding to Au in the cavities of cucurbituril molecules with sizes of D(Au) ≤ 1 nm and to macroaggregates of gold. A threefold increase in the Debye–Waller factor at 12 K for nanoparticles in comparison with the bulk metal and a corresponding increase in structural disorder are found. Special physical and chemical properties of small gold particles are dictated by structural disorder, deformations, and stresses increasing with a decrease in size. No visible differences in the Au electronic states upon the transition from bulk to nanoparticles are detected.
Cite:
Erenburg S.B.
, Trubina S.V.
, Kovalenko E.A.
, Gerasko O.A.
, Zaikovskii V.I.
, Toporkov D.K.
, Kvashnina K.O.
, Nikitenko S.G.
Structure and Dimensions of Gold Clusters in Cucurbit[n]uril (CB[n], n = 6, 7) Cavities
Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques. 2015. V.9. N5. P.1031-1038. DOI: 10.1134/S1027451015050262 WOS Scopus РИНЦ
Structure and Dimensions of Gold Clusters in Cucurbit[n]uril (CB[n], n = 6, 7) Cavities
Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques. 2015. V.9. N5. P.1031-1038. DOI: 10.1134/S1027451015050262 WOS Scopus РИНЦ
ArticleLinkType.TRANSLATED_TO_ORIGINAL:
Эренбург С.Б.
, Трубина С.В.
, Коваленко Е.А.
, Герасько О.А.
, Зайковский В.И.
, Топорков Д.К.
, Квашнина K.О.
, Никитенко С.Г.
Размеры и структура малых кластеров золота в полостях молекул кукурбит[n]урила (CB[n], n = 6, 7)
Поверхность. Рентгеновские, синхротронные и нейтронные исследования. 2015. №10. С.45-52. DOI: 10.7868/S0207352815100054 РИНЦ
Размеры и структура малых кластеров золота в полостях молекул кукурбит[n]урила (CB[n], n = 6, 7)
Поверхность. Рентгеновские, синхротронные и нейтронные исследования. 2015. №10. С.45-52. DOI: 10.7868/S0207352815100054 РИНЦ
Dates:
Submitted: | Jan 20, 2015 |
Published print: | Sep 1, 2015 |
Published online: | Oct 16, 2015 |
Identifiers:
Web of science | WOS:000213960400030 |
Scopus | 2-s2.0-84944201190 |
Elibrary | 24961321 |
Chemical Abstracts | 2015:1669327 |
OpenAlex | W2346853812 |