АОР 2019 in Lisbon: LNBE & LPNM Mega-Laboratory cluster gives 6 oral presentations, gets first prize for best young researcher's presentation

Researchers from the cluster of the international laboratories of Nano-Bioengineering (LNBE) and Hybrid Photonic Nanomaterials (LPNM) presented six statements, including two invited lectures, at the IV International Conference on Applications in Optics and Photonics (AOP 2019) held in Lisbon from May 31 to June 4.
Galina Nifontova, Ph.D., senior researcher, won the first prize for the best young researcher's presentation.

In the study that won the prize, Engineering of Fluorescent Biomaging Tools Based on Quantum Dot-Encoded Polyelectrolyte Microcapsules and Their Cancer Cell Targeting Applications, Galina Nifontova together with M. Baryshnikova, F. Ramos-Gomes, F. Alves, I. Nabiev, and A. Sukhanova developed and fabricated a novel tool for cancer diagnosis and treatment. This is a microcapsule whose shell is embedded with quantum dots (serving as fluorescent labels) and the surface functionalized with capture antibodies. These microcapsules are biocompatible, which allows them to be used in vivo both for detection of target cells (e.g., cancer ones) and for targeted drug delivery.

 

The two invited lectures were given by Professor Igor Nabiev, Ph.D., D.Sci., the head of LNBE and Professor Yury Rakovich, Ph.D., the head of LPNM.

Professor Igor Nabiev gave a lecture on Nanophotonic Tools Based on the Conjugates of Nanoparticles with the Single-Domain Antibodies for Multi-Photon Micrometastases Detection and Ultrasensitive Biochemical Assays. The lecture summarized the advantages of innovative fluorescent nanoprobes as tools for early cancer diagnosis (a good diffusability through tissues, bright fluorescence, and high photostability), which can take malignant tumor treatment to a whole new level.

Professor Yury Rakovich in his lecture on Light-Matter Interaction: Plasmon–Exciton Hybridization in Strong Coupling Regime reviewed studies on plasmon–exciton interaction in hybrid nanostructures and ways of its detection by spectroscopic methods. Among others, recent data were presented demonstrating that nonmagnetic organic molecules can exhibit magneto-optical response upon binding plasmonic nanoparticles.

Dmitry Dovzhenko, Ph.D., researcher, presented a study on Polariton-Assisted Emission of Strongly Coupled Organic Dye Excitons in a Tunable Optical Microcavity (co-authored by K. Mochalov, I. Vaskan, I. Kryukova, Y. Rakovich, and I. Nabiev). The tunable microcavity designed by the authors allowed them to achieve controlled variation of the photoluminescent properties of an organic fluorophore due to the interaction between electron transitions in its molecule and the electromagnetic modes of the microcavity in the strong coupling regime. This has implications for designing novel sources of coherent spontaneous emission at a tunable wavelength.

Viktor Krivenkov, Ph.D., researcher, reported on Modification of Multiphoton Emission Properties of Single Quantum Dot Due to the Long-Range Coupling with Plasmon Nanoparticles in Thin-Film Hybrid Material (the study co-authored by S. Goncharov, P. Samokhvalov, A. Sanchez-Iglesias, M. Grzelczak, I. Nabiev, and Y. Rakovich). The authors succeeded in considerably increasing the quantum yield of multiphoton luminescence upon simultaneous generation of two excitons in a single quantum dot due to interaction with plasmons of gold nanoparticles. The approach to controlling the efficiency of multiphoton emission developed in this study makes it possible to engineer efficient entangled-photon sources for quantum cryptography and to enhance the performance of photovoltaic cells.

 

Maria Zvaigzne, research engineer and postgraduate student, told about the results of the study on The Crucial Role of Surface Ligands in Photostability of Colloidal Quantum Dots (co-authored by V. Krivenkov, P. Samokhvalov, and I. Nabiev). Analysis of photobrightening and photodarkening of the luminescence of quantum dots in a colloidal solution and in a polymer matrix showed that the characteristics of the outer organic shell of quantum dots played a crucial role in both phenomena. This is likely to be related to photoinduced charge transfer from the quantum dot core to the surface ligand molecules. The results of the study will help to increase the efficiency of quantum dot–based devices operating under constant illumination.

The studies presented at AOP 2019 and, in particular, the first prize awarded for one of them have confirmed that the LNBE–LPNM cluster is one of world-recognized leaders in nanotechnology, nanophotonics, and related fields.

And we congratulate Galina Nifontova and her co-authors on their success once again!

The conference program and abstracts are available at http://www.optica.pt/aop2019/docs/AOP2019_ABSTRACTS.pdf

Contacts:

Galina O. Nifontova, Ph.D., senior researcher (galya.nif@yandex.ru)

Professor Igor R. Nabiev, Ph.D., D.Sci., head of LNBE (igor.nabiev@gmail.com)

Professor Yury P. Rakovich, Ph.D., head of LPNM (yury.rakovich@gmail.com)

Dmitry S. Dovzhenko, Ph.D., researcher (dovzhenkods@gmail.com)

Viktor A. Krivenkov, Ph.D., researcher (vkrivenkov@list.ru)

Maria A. Zvaigzne, research engineer, postgraduate student (mariazvaigzne@gmail.com)

Maria G. Korenkova, director of public relations, LNBE (MGKorenkova@mephi.ru)

Alexandra V. Razgulina, engineer, LPNM (alexandrav.korenkova@gmail.com)

Laboratory of Nano-Bioengineering (LNBE), http://lnbe.mephi.ru/en/about and
Laboratory of Hybrid Photonic Nanomaterials (LPNM), http://lpnm.mephi.ru/index.php/en/
National Research Nuclear University MEPhI,
31 Kashirskoe shosse, 115409 Moscow, Russian Federation

 
 
 
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