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Search by tag «Nanoparticles» 22 results
Pharmacological Constructor: Scientists Propose Method for Synthesising Calcium Carbonate Particles with Different Geometry for Targeted Drug Delivery
A group of scientists from ITMO’s Faculty of Physics and Engineering in collaboration with their colleagues from the First Pavlov State Medical University of St. Petersburg and Tel Aviv University conducted a complex analysis of the growth conditions of porous particles of calcium carbonate of various morphology that can be used for delivering bioactive substances to cells and tissue. The samples were tested on a model of glioma cells. The results were published in ACS Sustainable Chemistry and Engineering. ITMO.NEWS contacted Landysh Fatkhutdinova, a Master’s student at ITMO’s Faculty of Physics and Engineering, and her research advisor Mikhail Zyuzin, and learned about the prospects of the research’s application in biology and medicine.
An international research group including ITMO University specialists has experimentally demonstrated a method of generating complex nanoparticles that can be applied in nanophotonics for light adjustment purposes. It has the potential to change the way such materials are produced today and reduce the price of nanoparticle production, which would foster the development of microelectronics. The paper was published in Advanced Functional Materials.
Fluorescent carbon nanoparticles, also known as carbon dots, were first described in the early ‘00s. But even today, scientists around the globe still have not reached a consensus on their inner structure and emission process. Carbon dots have a great deal of potential applications due to their biocompatibility with the human body and the ease and low cost of their production as compared to semiconductor quantum dots. Researchers from ITMO University have published two research papers in which they put forth their answers to the burning questions about carbon dots.
ITMO University scientists in collaboration with their colleagues from the Swedish University of Agricultural Sciences (SLU University), Uppsala, Sweden, have developed biocomposites made of proteins based on natural spider silk and optically active nanoparticles. What is remarkable about the new material is that it combines the properties of natural silk fiber and synthetic particles. The biocomposite has unique mechanical characteristics and can give a detectable optical response when exposed to infrared radiation, which makes it a potential candidate for biomedical applications. This article was published in ACS Applied Materials & Interfaces.
An international team of physicists has produced first evidence of particles capable of scattering light in lateral direction by suppressing forward and backward scattering. The researchers studied the physics behind this phenomenon and confirmed their theoretical results with an experiment in the microwave spectral range, proving that lattices or metasurfaces made of these materials can be completely invisible. These results can be used in a variety of applications including light routing, binary-coded holograms, and sensors. The study was published in Physical Review Letters.
Ksenia Mosina, a Master’s student at ITMO University’s SCAMT Laboratory, went to Canada as part of her student exchange program to participate in research on the synthesis of gold core-shell nanoparticles for biosensing and photocatalysis. The results of the research were published in Nanoscale. In this interview with ITMO.NEWS, Ksenia shares about her experiences and the skills she acquired in the Canadian laboratory.
A team of ITMO University scientists and their international colleagues has developed a method of reversible adjustment of the nanosized light sources radiation color. While earlier studies suggested that the radiation color could only be specified during the nanoparticle synthesis stage, the new research reveals that it also can be changed in fully-formed particles. Stability and electromagnetic resonances of the particles are retained during this adjustment, which opens new possibilities for production of optical chips, LEDs, and optoelectronic devices. The findings are published in Nano Letters.
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.
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.
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.