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ITMO Laboratory of Anisotropic and Optically Active Nanostructures

Development of new chiral quantum dot systems and their applications.

Organization type: Laboratory

Field of science: Nanotechnology

General information
Contacts

General information

Chirality is a global property of all biological objects. However, due to their crystal lattice structure and growth characteristics, nanocrystals also possess chirality. The laboratory staff's work is focused on studying this phenomenon. The research results will enable unprecedented biocompatibility of nanocrystals. This outcome will find wide biological and medical applications.

Project title: Development of new chiral quantum dot systems and their application

Goals and Objectives

Research area: Nanotechnology
Project Goal: Development of new types of scientifically and technologically significant chiral inorganic materials based on nanocrystals, investigation of their properties, and analysis of their potential practical applications
Practical significance of the research
Scientific results:
  • A methodology for creating new chiral luminescent nanomaterials based on titanium dioxide via one-step anhydrous synthesis has been proposed.
  • A new optical sensing method has been proposed, based on the chiral recognition of optically active CoFe2O4 magnetic nanoparticles using CdSe/CdS core-shell quantum dots stabilized with cysteine of varying chirality.
  • Regularities of the influence of induced chirality of Mn-doped ZnS quantum dots on the viability of A549 cells have been established.
  • A physical model of the Ce6 dimeric form has been developed with corresponding calculated absorption and circular dichroism spectra, which are in qualitative agreement with experimental data.
  • A methodology for replacing the organic shell of colloidal cadmium selenide quantum dots of various sizes has been proposed.
  • A physical model for the formation of hybrid structures based on colloidal CdSe/ZnS quantum dots and tetra(p-trimethylamino)phenylporphine molecules formed in polyethylene terephthalate track membranes has been proposed.
  • Patterns of photoinduced changes in the luminescent properties of hybrid structures based on titanium dioxide nanoparticles and CdSe/ZnS quantum dots have been determined.
  • Patterns of luminescent and photoelectric properties of hybrid structures based on CdSe/ZnS quantum dots and multilayer graphene have been established.
  • Patterns of the influence of semiconductor quantum dot shell thickness on optical characteristics, including optical activity, have been found.
  • Patterns of optical properties of lead sulfide quantum dots embedded in a nanoporous silicate glass matrix, obtained by steady-state and time-resolved photoluminescence spectroscopy, have been determined.
  • Patterns of enantioselective cellular uptake of chiral semiconductor nanocrystals have been established.
  • A model of circular dichroism of CdSe/CdS quantum dots in quantum rods oriented in an external electric field has been developed.
  • A technique for the separation of a racemic mixture of chiral molecules has been developed.
  • A procedure for the synthesis of chiral optically active semiconductor nanocrystals and their quality control using optical spectroscopy and electron microscopy has been developed.
  • A method for creating two-dimensional self-organized superlattices from semiconductor nanocrystals has been developed.
  • A quantum mechanical theory of chiral semiconductor nanoscrolls has been developed.
  • A theoretical model of collective excitations of supercrystals based on gyrotropic quantum dots with complex lattices consisting of two or more sublattices has been proposed.
  • A model of optically active molecules based on quantum dots has been developed, each possessing a dipole moment associated with the fundamental interband transition between size-quantization states of charge carriers.
  • An approach has been proposed to enhance the enantioselectivity of the optical properties of nanoparticles, based on the ordering of achiral nanoparticles into a chiral supercrystal with dimensions comparable to the wavelength of light.
  • A theoretical model for enhancing the optical activity of semiconductor nanocrystals through ion doping has been proposed.
  • A model for the broadening of optical absorption spectra by ensembles of randomly oriented nanorods and nanoplatelets under the influence of a static electric field has been proposed.
  • A theory of the optical activity of topologically distorted semiconductor nanocrystals has been developed.
  • A theoretical model of the interaction between singular light and chiral nanocrystals has been developed.
  • A method for separating enantiomers of chiral inorganic nanoparticles using enantioselective optical forces has been proposed.
  • A model of nanocrystal optical activity caused by the mixing of quantum states has been developed.

Education and personnel retraining

  • 16 internships for students, postgraduates, and young scientists in foreign universities have been organized.
  • The international conference PCNSPA Conference 2016 (Russia) was held.
  • Defense: 2 doctoral dissertations, 10 candidate dissertations.
  • Five educational programs and lecture courses have been developed and implemented in the educational process. Lecture courses: "Optical Processes in Nanostructures" (Master's), "Optics of Nanoscale Supramolecular Systems" (Master's), "Nanostructures in Electronics, Optoinformation Systems, Biology, and Medicine" (Master's). Educational programs: "Physics and Technology of Nanostructures" (Master's), "Physics of Nanostructures" (Bachelor's).

Cooperation

  • Trinity College (Ireland): joint research in the field of solid-state chiral nanostructures, visualization and sensing of biological objects using nanoparticles, joint publications, exchange of students, postgraduates, and young scientists.
  • University of Exeter (UK): joint research in developing approaches for integrating 2D materials on CMOS photonic chips using synthetic chemistry and microfluidics technology, joint project "Graphene photonic metamaterials for fast information and communication," joint publications, exchange of young scientists.
  • Federal Institute for Materials Research and Testing (Germany): joint research in the field of creating a sensory nanoplatform for multiplex cell analysis, joint project "Modeling and design of a sensory platform based on ternary quantum dots for multiplex cell analysis", joint publications, exchange of young scientists
  • ETH Zurich (Switzerland): joint project "Modeling and design of a sensory platform based on ternary quantum dots for multiplex cell analysis"
  • Ben-Gurion University (Israel): joint research on defects in carbon nanostructures, joint publications
  • Shanghai Jiao Tong University (China): joint research on metamaterials in the form of ultrathin silicon nanostructures, joint publications
  • Hosei University (Japan): joint research on optical and structural properties of one- and two-dimensional nanocarbon materials, joint publications, exchange of young scientists
  • State University of Campinas (Brazil): joint research on hybrid materials based on graphene and semiconductor quantum dots, joint publications, exchange of graduate students and young scientists
  • National Research Nuclear University MEPhI (Russia): joint project "Theoretical modeling of the energy spectrum of the electronic subsystem of the hybrid 2D structure 'graphene-QD'", joint publications

Contacts

Website: http://irc.ifmo.ru/ru/88717/
Contact person: Andrey Vitalievich Ivanov — PhD in Physics and Mathematics, Associate Professor
Address: Birzhevaya Liniya, 14
Phone: +7(812)457-17-80
Email: avivanov@itmo.ru
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