Researchers of LNBE will make as many as five oral presentations at the NANOMEETING 2015 international conference

Researchers from LNBE will take part in the Nanomeeting 2015 conference to be held in Minsk, Republic of Belarus, on May 26–29 this year and will make five oral presentations there. This conference is held every two years beginning from 1995 and serves as a forum for communication and exchange of experience between specialists in nanostructures from all over the world. The reports presented to the conference will be published in the Proceedings of International Conference NANOMEETING 2015: Physics, Chemistry and Applications of Nanostructures – Reviews and Short Notes included in the Scopus and Web of Science databases.

Igor Nabiev, the leading scientist of LNBE, will present two reports. One of them, What happens when nanotechnology meets biology: breakthrough applications are accompanied with unexpected hazards, reviews the breakthrough results that the Laboratory of Nano-Bioengineering of National Research Nuclear University MEPhI has obtained since its foundation in November 2011 in the development of a new generation of nano–bio hybrid materials with energy-transfer properties, basic research in the physical processes in these materials, and demonstration of their implications for medicine, biophotonics, and bio-photovoltaics. Special emphasis is made on various aspects of nanotoxicity and other consequences of interaction between biological and inorganic nano-objects that are hazardous for living organisms.

The other presentation by Prof. Nabiev, Single-photon and two-photon tumor imaging and diagnosis using oriented conjugates of single-domain antibodies and quantum dots, deals with engineering of oriented conjugates of single-domain antibodies with semiconductor quantum dots whose two-photon absorption cross-section is close to the theoretical maximum for CdSe and orders of magnitude larger than those of organic dyes. Multi-photon diagnostic nanoprobes developed in LNBE have been shown to be highly specific for malignant tumors at the earliest stages of breast and prostate cancers. In addition, two-photon excitation of these nanoprobes has proved to provide a 40 times improved ratio of the signal intensity to the tissue autofluorescence intensity as compared with one-photon excitation.

Victor Krivenkov's report on Two-photon-induced Förster resonance energy transfer in a quantum dot–bacteriorhodopsin hybrid material presents basic research in fluorescence resonance energy transfer from semiconductor quantum dots to bacteriorhodopsin, a photosensitive protein that is considered a promising component of photovoltaic and optoelectronic devices. The study presented to the conference was the first to use two-photon excitation of quantum dots in this nano–bio hybrid system.

The optical characteristics of CdSe/CdS/ZnS quantum dots embedded into one-dimensional porous silicon photonic crystals are described in Dr. Igor Martynov's presentation entitled Spatial and spectral properties of CdSe/CdS/ZnS quantum dot luminescence in one-dimensional photonic structures based on porous silicon. The data to be presented demonstrate an enhanced luminescence of quantum dots at the boundary of the Bragg reflector bandgap and at the microcavity resonance mode.

Dr. Sergey Dayneko will report on Photovoltaic structures based on organic semiconductors and CdSe quantum dots. Research and developments performed in LNBE have shown that the efficiency of energy conversion in solar cells based low-band-gap organic semiconductors and CdSe quantum dots is determined by relative positions of electron levels in the components of the hybrid system, rather than the absorption coefficient of the nanocrystals. Tis discovery may change the current views on the principles of designing hybrid solar cells that contain quantum dots.

Contacts:

Prof. Igor Nabiev, PhD, DSc, leading scientist (igor.nabiev@gmail.com)

Viktor A. Krivenkov, junior research assistant (vkrivenkov@list.ru)

Igor L. Martynov, PhD, research assistant (i.l.martynov@gmail.com)

Sergey V. Dayneko, PhD, research assistant (s.daineko@gmail.com)

Laboratory of Nano-Bioengineering, Moscow Engineering Physics Institute
31 Kashirskoe shosse, 115409 Moscow, Russian Federation

http://www.lnbe.mephi.ru/en

 
 
 
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