Kinetics and Mechanism of the Growth of Gold Nanoparticles by Reduction of Tetrachloroauric Acid by Hydrazine in Triton N-42 Reverse Micelles Full article
| Journal |
Journal of Nanoparticle Research
ISSN: 1388-0764 , E-ISSN: 1572-896X |
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| Output data | Year: 2011, Volume: 13, Pages: 4997-5007 Pages count : 11 DOI: 10.1007/s11051-011-0481-1 | ||||
| Tags | Gold nanoparticles, Growth kinetics, Reverse micelles, Triton N-42 surfactant | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 05-03-32308 |
| 2 | Russian Foundation for Basic Research | 09-03-00511 |
Abstract:
The kinetics of the growth of gold nanoparticles during the reduction of tetrachloroauric acid by hydrazine in dispersed aqueous solution encapsulated by reverse micelles of Triton N-42 surfactant (with decane as dispersion medium) was studied by means of spectrophotometry. According to DLS data, at a set value of solubilization capacity V s/V o = 0.005 initial micelles have an aqueous core hydrodynamic diameter d c = 3.6±0.2 nm. The final particles obtained after full reduction of AuIII have a metallic core of defect-free single-crystalline gold with a narrow size distribution and average core diameter d Au = 7.7 ± 1.4 nm as shown by TEM. The rate of the particle growth is limited by the rate of gold reduction. The process kinetics corresponds to the model consisting of two stages of reduction AuIII → AuI → Au0. The stages involve the formation and redox decay of the intermediate complexes Au(N2H4)Cl3 and Au(N2H4)Cl, and each stage proceeds via two routes: (1) homogeneous in the dispersed aqueous phase, and (2) heterogeneous on the particle surfaces. Reactions taking route (2) are autocatalytic because they proceed with participation of the surface atoms of particles as the final products of AuIII reduction. The dependencies of observed rate constants on reagent concentrations, temperature, and solubilization capacity of the micellar solution are studied.
Cite:
Tatarchuk V.V.
, Sergievskaya A.P.
, Druzhinina I.A.
, Zaikovskii V.I.
Kinetics and Mechanism of the Growth of Gold Nanoparticles by Reduction of Tetrachloroauric Acid by Hydrazine in Triton N-42 Reverse Micelles
Journal of Nanoparticle Research. 2011. V.13. P.4997-5007. DOI: 10.1007/s11051-011-0481-1 WOS Scopus РИНЦ ANCAN OpenAlex
Kinetics and Mechanism of the Growth of Gold Nanoparticles by Reduction of Tetrachloroauric Acid by Hydrazine in Triton N-42 Reverse Micelles
Journal of Nanoparticle Research. 2011. V.13. P.4997-5007. DOI: 10.1007/s11051-011-0481-1 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Sep 9, 2010 |
| Accepted: | Jun 25, 2011 |
| Published online: | Jul 12, 2011 |
| Published print: | Oct 1, 2011 |
Identifiers:
| Web of science: | WOS:000295609700057 |
| Scopus: | 2-s2.0-80955158813 |
| Elibrary: | 18013259 |
| Chemical Abstracts: | 2011:1271541 |
| Chemical Abstracts (print): | 156:347673 |
| OpenAlex: | W2162881754 |