Search by tag «Nanocrystals» 9 results

• New Technology for Drug- and Enzyme-Delivery Fluorescent Microparticles Suggested at ITMO

  Researchers from ITMO, St. Petersburg Academic University and the Institute for Analytical Instrumentation of the RAS have developed a technology for producing fluorescent microparticles with nanocrystals based on silver, indium, and sulfur. Compared to traditional organic pigments, such particles are less toxic and more resistant to laser radiation. These can be used in biomedicine to visualize blood vessels from the inside, determine the blood flow, and as carriers of treatments and enzymes. The results of the study are published in ACS Omega.

  01.11.2024

• ITMO Researchers Use Hybrid Crystal to Enable Simultaneous Grayscale and Color Direct Laser Writing

  With the new material suggested by ITMO physicists, it will be possible to embed grayscale images into color ones during direct laser writing. The researchers were the first to use metal-organic frameworks for the purpose; these are optically transparent materials that can transform laser radiation. When subjected to it, the material’s structure changes, with color defects formed inside. Each such defect has a unique scattering spectrum, making metal-organic frameworks useful in producing uncloneable anti-counterfeit trademarks. The material is described in a paper published in Advanced Functional Materials.

  24.05.2024

• Scientists Develop Light-emitting Composite Material Based on Perovskite Nanocrystals with Air- and Water Resistant Optical Characteristics

  An international team of scientists including researchers from ITMO University has developed a new composite material based on perovskite nanocrystals to fabricate miniature light sources with improved performance. Protection of perovskite nanocrystals within porous glass microspheres made it possible to increase their stability by almost 3 times. Moreover, the subsequent coating of these particles with polymers resulted in the fabrication of water-dispersible luminescent microspheres based on CsPbBr3 nanocrystals. This method of fabrication is especially important for the implementation of perovskite nanocrystals in diverse biological applications. The results have been published in ChemNanoMat.

  29.04.2020

• Russian Scientists Conduct Research on European XFEL

  The European XFEL is a research facility with the most powerful X-ray laser in the world, which provides scientists with ultrashort X-ray flashes, allowing them to observe chemical reactions, decipher the structure of complex biological objects and solve other topical tasks. Russian researchers had already participated in the European XFEL’s projects, but only as part of an international research group. In October 2018, a group of scientists from ITMO University gained independent access to the facility’s equipment and conducted research on a new class of materials.

  04.02.2019

• NSP2018: Scientists Discuss Nanostructures in Photonics

  Earlier this May, 60 participants from 14 countries attended the international workshop and school Nanostructures for Photonics 2018. Among the participants were heads of major research laboratories and international projects, including the megascience project European XFEL (X-Ray free-electron laser). The guests spoke with ITMO.NEWS about current research trends, practical applications of nanostructures in nanophotonics, and future collaboration in this area.

  24.05.2018

• ITMO Physicists Use Radiofrequency Trap to “Freeze” Nanocrystals

  A group of physicists from ITMO University has developed a system that provides optical cooling to nanocrystals. The system, made up of a radiofrequency trap and a laser light source, decreases the kinetic energy of a nanocrystal and lowers it to its quantum limit, at which new properties emerge. This method may prove useful in fundamental research and studies of biological objects within the framework of quantum mechanics. A research paper was published in the Journal of the Optical Society of America B as an editors’ pick.

  28.12.2017

• New Nanoobject Construction Method Opens Road to Complex Optics

  ITMO University scientists have developed a new approach to nanoobject construction, one that provides the opportunity to study and predict how deformations and defects in the crystal lattice affect the optical properties of semiconductor nanocrystals. This model allows them to calculate both the linear and non-linear optical properties of various nanoobjects such as: nanorolls, nanorods, nanoplates and others. The method can be used to create optical materials and devices with new functionalities with uses in drug delivery, chiral exciton-based devices and chiral catalysis devices, and areas such as biosensing and spintronics. Results of this research were published in Nano Letters and used in the writing of other articles in ACS Nano.

  02.10.2017

• A Guide for Energy Saving: How to Make It Safer and Cheaper

  Modern science is still puzzled with the problem of a lack of fuel materials and aims to develop new effective and safe methods of storage and saving energy. These days bio and nanotechnologies as well as nonstandard chemical elements are used for these purposes. We’ve prepared a review of achievements in this field made by international researchers and ITMO University.

  13.01.2017

• Chirality: The Property That Changes It All

  This year, specialists from ITMO's Modeling and Design of Nanostructures Laboratory published several articles on nanocrystal chirality in such renowned science journals as Optics Letters, Journal of Applied Physics and Scientific Reports. The article on the optical activity of chiral nanocrystals was highly praised by the Optical Society (OSA). So, why is chirality of nanocrystals and biomolecules so important? What methods do experts develop to separate hazardous substances from safe ones? Ivan Rukhlenko, head of Modeling and Design of Nanostructures Laboratory, and Nikita Teplyakov, his colleague, shared on the topic.

  02.11.2016