Synthesis and Concentration of Organosols of Silver Nanoparticles Stabilized by AOT: Emulsion Versus Microemulsion Full article
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Langmuir
ISSN: 0743-7463 , E-ISSN: 1520-5827 |
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| Output data | Year: 2018, Volume: 34, Number: 8, Pages: 2815-2822 Pages count : 8 DOI: 10.1021/acs.langmuir.7b04071 | ||||
| Tags | reverse microemulsions; micelles; size; polymers; charge; laser; gold; inks | ||||
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 15-13-00080 |
Abstract:
In this work, we tried to combine the advantages of microemulsion and emulsion synthesis to obtain stable concentrated organosols of Ag nanoparticles, promising liquid-phase materials. Starting reagents were successively introduced into a micellar solution of sodium bis-(2-ethylhexyl)sulfosuccinate (AOT) in n-decane in the dynamic reverse emulsion mode. During the contact of the phases, Ag+ passes into micelles and Na+ passes into emulsion microdroplets through the cation exchange AOTNaOrg + AgNO3Aq = AOTAgOrg + NaNO3Aq. High concentrations of NaNO3 and hydrazine in the microdroplets favor an osmotic outflow of water from the micelles, which reduces their polar cavities to ∼2 nm. As a result, silver ions are contained in the micelles, and the reducing agent is present mostly in emulsion microdroplets. The reagents interact in the polar cavities of micelles to form ∼7 nm Ag nanoparticles. The produced nanoparticles are positively charged, which permitted their electrophoretic concentration to obtain liquid concentrates (up to 30% Ag) and a solid Ag–AOT composite (up to 75% Ag). Their treatment at 250 °C leads to the formation of conductive films (180 mOhm per square). The developed technique makes it possible to increase the productivity of the process by ∼30 times and opens up new avenues of practical application for the well-studied microemulsion synthesis.
Cite:
Bulavchenko A.I.
, Arymbaeva A.T.
, Demidova M.G.
, Popovetskiy P.S.
, Plyusnin P.E.
, Bulavchenko O.A.
Synthesis and Concentration of Organosols of Silver Nanoparticles Stabilized by AOT: Emulsion Versus Microemulsion
Langmuir. 2018. V.34. N8. P.2815-2822. DOI: 10.1021/acs.langmuir.7b04071 WOS Scopus РИНЦ AN PMID OpenAlex
Synthesis and Concentration of Organosols of Silver Nanoparticles Stabilized by AOT: Emulsion Versus Microemulsion
Langmuir. 2018. V.34. N8. P.2815-2822. DOI: 10.1021/acs.langmuir.7b04071 WOS Scopus РИНЦ AN PMID OpenAlex
Dates:
| Submitted: | Nov 28, 2017 |
| Accepted: | Jan 22, 2018 |
| Published online: | Feb 12, 2018 |
| Published print: | Feb 27, 2018 |
Identifiers:
| Web of science: | WOS:000426614100028 |
| Scopus: | 2-s2.0-85042640382 |
| Elibrary: | 35518958 |
| Chemical Abstracts: | 2018:178876 |
| PMID: | 29376385 |
| OpenAlex: | W2784866585 |