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Colloidal quantum dots
Roman B. Vasiliev
e-mail: romvas@inorg.chem.msu.ru
phone: +7(495)939-54-71
Research
Group research focuses on chemistry, physics and materials science of colloidal semiconductor nanocrystals (colloidal quantum dots). Colloidal quantum dots from the chemical viewpoint are semiconductor nanocrystals stabilized by amphiphilic molecules. From the physical viewpoint each quantum dot is zero-dimensional electronic system with size-dependent discrete spectrum. Quantum dots show the strong luminescence properties, giant extinction coefficients, high stability. For colloidal nanocrystals chemical control of size, shape and composition allow to precise tune of electronic and optical properties. Quantum dots are very attractive for applications in fields of LEDs (organic as well as all-inorganic QD-based LEDs), lasers, solar cells, biolabels.
Scope
- colloidal synthesis of A2B6 nanocrystals, nucleation and growth in colloidal non-polar systems.
- colloidal nanocrystals with complicated shape, branched nanocrystals
- colloidal nanoheterostructures, core-shell nanocrystals with spatially separated charges (type II nanocrystals)
- colloidal quantum dots as photosensitizers in solar cells
- doping colloidal nanocrystals
- luminescent biolabels
Diploma work performed in group
- Synthesis of the colloidal CdTe nanotetrapods
2009 Babynina A.
- Synthesis of the photosensitive composites based on nanocrystalline tin dioxide sensitized by CdSe quantum dots
2009 Maslova O.
- CdTe and CdTe/CdSe colloidal quantum dots synthesis
2008 Dirin D.
- Synthesis and optical properties of the CdSe colloidal quantum dots capped with oleic acid
2006 Tananaev P.
PhD thesis defences performed in group
- Copper doped cadmium selenide quantum dots
2010 Tananaev P.
Projects
- RFBR 07-03-00843 "Semiconductor core/shell nanocrystals with charge carriers spatial separation: synthesis and optical properties (2007-2009)
- FTP 02.513.11.3065 "Organic composites with quantum dots for photon energy conversion" (2007) (subcontract)
- Grant of President RF МК-5074.2007.3 "Nanostructured materials for optoelectronic convertors based on quantum dots with spatially devided exciton" (2007-2008)
- Grant of President RF МК-2000.2005.3 "Design and optical properties of the core/shell quantum dots" (2005-2006)
- RFBR 03-03-32586 "Electron and ion transport in nanocrystallite oxides" (2003-2005)
- U.M.N.I.K. "Development of prototype of the solar cell photosensitive element based on CdTe/CdSe colloidal quantum dots" (2008-2010)
Image gallery
Colloidal quantum dots luminescence
Shape control of colloidal nanocrystals
Recent publications
2009
- Effect of branching of tetrapod-shaped CdTe/CdSe nanocrystal heterostructures on their luminescence.
A.G. Vitukhnovsky, A.S. Shul'ga, S.A. Ambrozevich, E.M. Khokhlov, R.B. Vasiliev, D.N. Dirin, V.I. Yudson.
Physics Letters A, 2009, 373, p.2287-2290.
- Growth of sphere- and tetrapod-shaped Cd(Cu)Se nanocrystals from Cu(C17H35COO)2 and Cu4(PPh3)4(μ3-I)4.
P.N. Tananaev, S.G. Dorofeev, R.B. Vasiliev, K.O. Znamenkov, T.A. Kuznetsova.
Mendeleev Comm., 2009, 19(3), p.131-132.
- Growth of near-IR luminescent colloidal CdTe/CdS nanoheterostructures based on CdTe tetrapods.
R.B. Vasiliev, D.N. Dirin, M.S. Sokolikova, S.G. Dorofeev, A.G. Vitukhnovsky, A.M. Gaskov.
Mendeleev Comm., 2009, 19(3), p.128-130.
- Temperature effect on the growth of colloidal CdTe nanotetrapods.
R.B.Vasiliev, D.N.Dirin, A.M.Gaskov.
Mendeleev Comm., 2009, 19(3), p.126-127.
- Fluorescent immunolabeling of cancer cells by quantum dots and antibody scFv fragment.
T.A. Zdobnova, S.G. Dorofeev, P.N. Tananaev, R.B. Vasiliev, T.G. Balandin, E.F. Edelweiss, O.A. Stremovskiy, I.V. Balalaeva, I.V. Turchin, E.N. Lebedenko, V.P. Zlomanov, S.M. Deyev.
J. Biomed. Opt. Vol., 2009, 14, 021004.
- Preparation of copper-doped CdSe nanocrystals.
P.N. Tananaev, S.G. Dorofeev, R. B. Vasil'ev, T.A. Kuznetsova.
Inorg. Mat., 2009, 45(4), p.347-351.
2008
- Hole mobility and trapping in PVK films doped with CdSe/CdS and CdSe quantum dots.
S.Ambrozevich, M. van der Auweraer, D. Dirin, M.Parshin, R.Vasil'ev, A.Vitukhnovsky.
Journal of Russian Laser Research, 2008, 29(6), p.526-537.
- Effect of H-bonded liquid crystal polymers on CdSe quantum dot alignment within nanocomposite.
R.Talroze, G.Shandryuk, A.Merekalov, G.Bondarenko, A.Rebrov, A.Gaskov, R.Vasiliev, E.Matukhina.
Macromolecules, 2008, 41, p. 2178-2185.
2007
- IR-active vibrational modes of CdTe, CdSe, and CdTe/CdSe colloidal quantum dot ensembles.
R.B.Vasiliev, V.S.Vinogradov, S.G.Dorofeev, S.P.Kozyrev, I.V.Kucherenko, N.N.Novikova.
Journal of Physics: Conference series, 2007, 92, 012054.
- Photoresponse of colloidal quantum dots - conducting SnO2 matrix composite.
R.B.Vasiliev, D.N.Dirin, A.V.Babynina, S.G.Dorofeev, M.N.Rumyantseva, A.M.Gaskov.
Proceedings of the International Conference MEC-2007 (Molecular and Nanoscale Systems for Energy Conversion), Moscow, Russia, 2007, October 01-03, p.91-94.
- Blinking as a tool of quantum dot OLEDs studies.
P. Argyrakis, V. Lidsky, R. Vasiliev, D. Dirin, V. Zalunin, A. Vitukhnovsky.
Proceedings of the International Conference EURODISPLAY'07 (European series of International Display Research Conferences and Exhibitions), Moscow, Russia, 17-20.09.2007, p.151-154.
2006
- Imaging of QDs-labeled tumors in small animals by fluorescence diffuse tomography.
I.V.Turchin, I.V.Balalaeva, R.B.Vasil'ev, V.P.Zlomanov, V.I.Plehanov, A.G.Orlova, E.V.Zagaynova, V.A.Kamensky, M.S.Kleshnin, M.V.Shirmanova, S.G.Dorofeev, and D.N.Dirin.
Laser Physics Letters, 2006, 3(4), p.208-212.
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