Submicrometer Intermediates in the Citrate Synthesis of Gold Nanoparticles: New Insights into the Nucleation and Crystal Growth Mechanisms Научная публикация
Журнал |
Journal of Colloid and Interface Science
ISSN: 0021-9797 , E-ISSN: 1095-7103 |
||||||||
---|---|---|---|---|---|---|---|---|---|
Вых. Данные | Год: 2011, Том: 362, Страницы: 330-336 Страниц : 7 DOI: 10.1016/j.jcis.2011.06.077 | ||||||||
Ключевые слова | Citrate reduction, Dynamic light scattering, Gold nanoparticles, In situ AFM, Liquid intermediates, Mechanism, Small-angle X-ray scattering | ||||||||
Авторы |
|
||||||||
Организации |
|
Информация о финансировании (1)
1 | Министерство образования и науки Российской Федерации | 02.740.11.0269 |
Реферат:
The reduction of tetrachloroaurate by citrate ions in aqueous solutions yielding gold nanoparticles (GNPs) has been studied using in situ tapping mode atomic force microscopy (AFM), UV-vis absorption and dynamic light scattering (DLS) spectroscopies, small-angle X-ray scattering (SAXS) along with ex situ TEM, EDX and XPS. Special attention is given to mesoscale intermediates responsible for the intense coloring of the transient solutions and their role in nucleation and crystal growth. AFM detects liquid droplet-like domains, globules 30-50 nm in diameter arranged in submicrometer aggregates in the gray and blue solutions, and well separated individual particles in the final red sols. DLS shows abrupt appearance of species about 30 nm and larger but not growing Au nanoparticles, while SAXS reveals gradually increasing nanoparticles and no aggregates. The mesoscale structures observed in TEM become looser as the reaction proceeds; they contain signatures of oxidized Au and other solutes. The results are interpreted in terms of decomposition of supersaturated solutions to afford domains ("dense droplets") enriched by gold, and then, after nucleation and coalescence of Au nuclei inside them, rather slow growth of gold nanoparticles within the associated globules; the color changes of the transient solutions are due to increasing interparticle distances.
Библиографическая ссылка:
Mikhlin Y.
, Karacharov A.
, Likhatski M.
, Podlipskaya T.
, Zubavichus Y.
, Veligzhanin A.
, Zaikovskii V.
Submicrometer Intermediates in the Citrate Synthesis of Gold Nanoparticles: New Insights into the Nucleation and Crystal Growth Mechanisms
Journal of Colloid and Interface Science. 2011. V.362. P.330-336. DOI: 10.1016/j.jcis.2011.06.077 WOS Scopus РИНЦ
Submicrometer Intermediates in the Citrate Synthesis of Gold Nanoparticles: New Insights into the Nucleation and Crystal Growth Mechanisms
Journal of Colloid and Interface Science. 2011. V.362. P.330-336. DOI: 10.1016/j.jcis.2011.06.077 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 17 апр. 2011 г. |
Принята к публикации: | 25 июн. 2011 г. |
Опубликована online: | 7 июл. 2011 г. |
Опубликована в печати: | 1 окт. 2011 г. |
Идентификаторы БД:
Web of science | WOS:000294142500012 |
Scopus | 2-s2.0-80051471458 |
РИНЦ | 16994650 |
Chemical Abstracts | 2011:1009993 |
Chemical Abstracts (print) | 155:417892 |
OpenAlex | W1972470892 |