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Mordvinova N, Emelin P, Vinokurov A, et al. Surface processes during purification of InP quantum dots. Beilstein J Nanotechnol. 2014;5:1220-5doi: 10.3762/bjnano.5.135.
Mordvinova, N., Emelin, P., Vinokurov, A., Dorofeev, S., Abakumov, A., & Kuznetsova, T. (2014). Surface processes during purification of InP quantum dots. Beilstein journal of nanotechnology, 51220-5. https://doi.org/10.3762/bjnano.5.135
Mordvinova, Natalia, et al. "Surface processes during purification of InP quantum dots." Beilstein journal of nanotechnology vol. 5 (2014): 1220-5. doi: https://doi.org/10.3762/bjnano.5.135
Mordvinova N, Emelin P, Vinokurov A, Dorofeev S, Abakumov A, Kuznetsova T. Surface processes during purification of InP quantum dots. Beilstein J Nanotechnol. 2014 Aug 06;5:1220-5. doi: 10.3762/bjnano.5.135. eCollection 2014. PMID: 25161857; PMCID: PMC4143098.
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Beilstein J Nanotechnol. 2014 Aug 06;5:1220-5. doi: 10.3762/bjnano.5.135. eCollection 2014.

Surface processes during purification of InP quantum dots.

Beilstein journal of nanotechnology

Natalia Mordvinova, Pavel Emelin, Alexander Vinokurov, Sergey Dorofeev, Artem Abakumov, Tatiana Kuznetsova

Affiliations

  1. Department of Chemistry, M.V. Lomonosov Moscow State University, 119991, Moscow, Russian Federation.
  2. Department of Chemistry, M.V. Lomonosov Moscow State University, 119991, Moscow, Russian Federation ; Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium.

PMID: 25161857 PMCID: PMC4143098 DOI: 10.3762/bjnano.5.135

Abstract

Recently, a new simple and fast method for the synthesis of InP quantum dots by using phosphine as phosphorous precursor and myristic acid as surface stabilizer was reported. Purification after synthesis is necessary to obtain samples with good optical properties. Two methods of purification were compared and the surface processes which occur during purification were studied. Traditional precipitation with acetone is accompanied by a small increase in photoluminescence. It occurs that during the purification the hydrolysis of the indium precursor takes place, which leads to a better surface passivation. The electrophoretic purification technique does not increase luminescence efficiency but yields very pure quantum dots in only a few minutes. Additionally, the formation of In(OH)3 during the low temperature synthesis was explained. Purification of quantum dots is a very significant part of postsynthetical treatment that determines the properties of the material. But this subject is not sufficiently discussed in the literature. The paper is devoted to the processes that occur at the surface of quantum dots during purification. A new method of purification, electrophoresis, is investigated and described in particular.

Keywords: cadmium-free material; electrophoresis; luminescence; precipitation; purification; quantum dots; semiconductors

References

  1. J Am Chem Soc. 2004 Sep 8;126(35):10832-3 - PubMed
  2. J Chem Phys. 2005 Aug 22;123(8):084706 - PubMed
  3. ACS Nano. 2013 Oct 22;7(10):9019-26 - PubMed

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