Search by tag «Nanoparticles» 55 results

• Researchers Use Silicon Nanoparticles For Bioimaging and Drug Delivery

  An international research team has studied a new cell visualisation and drug delivery system based on nanoparticles coated with luminescent dye molecules. Scientists have found out that the particle material and the distance between the dye and the particle’s surface affect the intensity of the luminescent signal. It turned out that silicon nanoparticles coated with dye molecules are more efficient than similar particles made of gold. Thanks to their biocompatibility, silicon particles can be used for cell visualisation and drug delivery. The research was published in Scientific Reports.

  28.05.2018

• Scientists Develop Nanodiamond-based Controllable Light Source

  Physicists from ITMO University and Australian National University have developed the first-ever controlled nanodiamond-based light source. Experiments have shown that diamond shells can double the emission speed of light sources and help control them without any additional nano- and microstructures. This result was achieved due to artificially created defects in the diamonds’ crystal lattice. Results of this research are important for the development of quantum computers and optical networks. The study is published in Nanoscale. 

  27.04.2018

• Researchers Use Nanoparticles to Study Proteins at High Temperatures

  Russian scientists have developed a multifunctional nanodevice based on dielectric nanoparticles coupled with a metal film. The device can be used to measure the temperature of surrounding molecules. Experiments have also shown that heat resistance in proteins can be increased by changing the nanoparticles’ chemical properties. The resulting nanostructures are very biocompatible, which makes them potentially useful in biomedicine. The results were published in Laser & Photonics Reviewers and the Journal of Biophotonics.

  10.04.2018

• Mining Hardware Helps Scientists Gain Insight into Silicon Nanoparticles

  Researchers from ITMO University and their international colleagues have developed the first three-dimensional dynamic model of an interaction between light and silicon nanoparticles. They used a supercomputer with graphic accelerators for the calculations. Results showed that when exposed to short, intense laser pulses, silicon particles temporarily lose their symmetry and their optical properties become strongly heterogeneous. Such a change in properties depends on particle size; therefore it can be used to control light at nanoscale and in ultrafast information processing devices. The study was published in Advanced Optical Materials.

  02.03.2018

• ITMO Researchers Participating in Targeted Drug Delivery Research

  Targeted delivery of medicine and genetic material to cells and tissue can be solved using micro- and nanoparticles of various types. Research in this field tends to be interdisciplinary and calls for collaboration between biologists, chemists and physicists. Mikhail Zyuzin, a postdoctoral researcher at ITMO University’s Faculty of Physics and Engineering, is working with colleagues from Russia and abroad to develop new methods of targeted drug delivery. He spoke with ITMO.NEWS about his research and working with other scientists.

  28.02.2018

• ITMO-Developed Nanoparticle Technology Helps Stop Internal Bleeding

  Scientists from ITMO University have developed magnetically-driven nanoparticles containing thrombin. A drug based on these nanoparticles can be injected intravenously and delivered straight to the site of a vascular injury to stop internal bleeding. It can accelerate local clot formation and reduce overall blood loss by up to 15 times. The nanoparticles are not toxic to humans and can potentially be used for safe treatment. The results were published in Scientific Reports.

  27.02.2018

• Researchers From ITMO Create First-Ever Light-Emitting Nanoantennas

  Young scientists from ITMO University have developed a new type of nanoscale light sources based on halide perovskites. The nanosources are subwavelength nanoparticles which serve both as emitters and nanoantennas capable of amplifying light emission inherently without need for additional devices. Moreover, perovskites enable tuning of emission spectrum throughout a visible range by varying the composition of the material. This makes the new nanoparticles a promising platform for creating compact optoelectronic devices such as optical chips, light-emitting diodes, or sensors. The results were published in Nano Letters, one of the leading journals on nanophotonics.

  12.02.2018

• ITMO Researchers Team Up With French Scientists on New Type of Hybrid Nanoparticles

  Scientists from ITMO’s Department of Nanophotonics and Metamaterials have won a grant as part of a federal targeted program. The three-year project will be carried out in collaboration with the Institute Jean Lamour (France), which has a great deal of experience in production and characterization of new hybrid nanostructures which have no counterparts among the existing materials and structures. This collaborative research will include the development of methods for the creation of new hybrid crystalline nanoparticles based on two metals, metal-insulators and metal-organics, as well as proving their unique optical properties. In future, they may serve as a foundation for cheap and effective hybrid photonic nanodevices.

  01.02.2018

• ITMO Scientists Develop New “White” Near-Field Optical Microscope

  Scientists from ITMO University have proven that a silicon-gold nanoparticle can act as an effective source of white light when agitated by a pulse laser in IR band. One such “nanobulb” was integrated into a standard probe microscope, which allowed the researchers to overcome the diffraction limit and examine subwavelength-size objects. What is more, it made it possible to study the optical response of nanoobjects on the entire visual band, and not just in particular wavelengths. Not only will the new technology make modern near-field microscopy cheaper and simpler, but it also can find use in medicine. The scientists are currently patenting their invention, while its description has recently been published in the prestigious Nano Letters journal.

  29.12.2017

• COMSOL DAY: Tractor Beams, Optical Traps and Nanoparticle Manipulation

  At the COMSOL Day in Moscow, head of ITMO’s International Research Laboratory of Nano-Opto-Mechanics Alexander Shalin gave a talk on the new algorithms for multiphysics modeling and optical power calculations using COMSOL Multiphysics software. He demonstrated how the program can be used to model the excitement of unidirectional surface plasmon-polaritons and their optomechanical effect on nano-objects on metal surfaces. Shalin’s team uses these methods to acquire fundamental results in optomechanics and improve the qualities of such technologies as tractor beams, optical trapping, positioning of nanoparticles and other.

  03.11.2017