Submicrometer Intermediates in the Citrate Synthesis of Gold Nanoparticles: New Insights into the Nucleation and Crystal Growth Mechanisms | Sciact - CRIS-system of Boreskov Institute of Catalysis

Submicrometer Intermediates in the Citrate Synthesis of Gold Nanoparticles: New Insights into the Nucleation and Crystal Growth Mechanisms Full article

Journal

Journal of Colloid and Interface Science
ISSN: 0021-9797 , E-ISSN: 1095-7103

Output data

Year: 2011, Volume: 362, Pages: 330-336 Pages count : 7 DOI: 10.1016/j.jcis.2011.06.077

Tags

Citrate reduction, Dynamic light scattering, Gold nanoparticles, In situ AFM, Liquid intermediates, Mechanism, Small-angle X-ray scattering

Authors

Mikhlin Yuri ¹ , Karacharov Anton ¹ , Likhatski Maxim ¹ , Podlipskaya Tatyana ² , Zubavichus Yan ³ , Veligzhanin Alexey ³ , Zaikovskii Vladimir ⁴

Affiliations

1	Institute of Chemistry and Chemical Technology of Siberian Branch of Russian Academy of Sciences, K. Marx Street, 42, Krasnoyarsk 660049, Russia
2	Nikolaev Institute of Inorganic Chemistry of Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
3	National Research Center ‘‘Kurchatov Institute’’, Moscow, Russia
4	Boreskov Institute of Catalysis of Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia

Funding (1)

The Ministry of Education and Science of the Russian Federation

02.740.11.0269

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.

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 ANCAN OpenAlex

Submitted:	Apr 17, 2011
Accepted:	Jun 25, 2011
Published online:	Jul 7, 2011
Published print:	Oct 1, 2011

Web of science:	WOS:000294142500012
Scopus:	2-s2.0-80051471458
Elibrary:	16994650
Chemical Abstracts:	2011:1009993
Chemical Abstracts (print):	155:417892
OpenAlex:	W1972470892

DB	Citing
Web of science	63
Scopus	63
Elibrary	59
OpenAlex	75