Dependence of the luminescence spectra of the non-stabilized ZnCdS nanoparticles placed in a biological environment on their temperature is investigated. It is shown that the intensity and the position of maximum luminescence of surface defects ZnCdS nanoparticles depends on the temperature and the properties of the biological environment until it is denatured.
In this paper the results of experimental studies are presented. The experiments were aimed to synthesis of materials with modified properties. A special technique of synthesis in low-temperature plasma flows allows controlling film material parameters. The possibility to control optical, morphological and electrophysical properties is shown by the examples of ZnO and Si films.
The formation of nanocomposites with embedded magnetite nanoparticles using layer-by-layer deposition is described in this review. It was shown, that physical properties of these composites are controllable by the variation of the magnetic nanoparticles layers number in their structure. The review of some practical application of magnetic nanocomposite materials based on their controllable properties was carried out as well.
This article presents the results of a study QD Langmuir monolayers on the water subphase and LB films transferred onto a solid surface. The monolayers of CdSe/CdS/ZnS QD stabilized by oleic acid without of supplements of amphiphilic matrix, was created. The monolayers was transfered on the solid substrate, what was proved by the AFM and the fluorescence spectroscopy methods. The fluorescence spectra of the LB films with variable numbers of layers was captured.
New method of remote group control over permeability and integrity of nanocomposite microstructures of different nature is submitted in this letter. Inorganic nanoparticles are used as a sensitizer to an electric field. The destruction possibility of polymeric microcapsules are shown. The destruction possibility of lipids vesicles on the example of the living cells covered with nanoparticles of gold is shown.
The work is a review of research in the area of nanostructured thin films formed by Layer-by-Layer self-assembly. This technology allows obtaining the composite coatings and nanomaterials with determined properties. Such structures act as important components of highly integrated devices in various fields of science and technology.
Composite nonwoven materials with different medical supplements are widely used for regenerative surgery. Majority of these medicines are cytotoxic, therefore precise drug delivery is necessary to decrease toxic effects. We propose novel polymer nanofibrous material impregnated by core–shell microstructures that can provide targeted and controllable release of encapsulated drugs. This biodegradable scaffold system was fabricated using mixing of calcium carbonate microparticles with chitosan solutions followed by electrospinning method.
The current state of producing of nanostructured composite materials based on polymers like molecular brushes was described. Experimental results established that using hydrophobic nanoparticles allows to effectively integrate the nanoparticles into the brush polymer monolayer with different length of the side chainsIn this case for composite monolayer formation we need to spread an aliquot of the polymer and nanoparticles simultaneously on the surface of the water subphase using Langmuir–Blodgett technique.
The review of scientific articles devoted to preparation of hybrid structures and widespread methods of impact on structure, composition and organic coating properties was carried out. It was demonstrated that difference between chemical and physical methods to modify and to impact is relative due to similar electrostatic interaction under applied external electric fields as well as between molecules and their fragments, i.e. there are internal electric fields in polyelectrolyte’s solution and at interfaces.
An influence of the electric field oriented vertically on the formation process of monolayers. Water and water solutions of inorganic salts are used as a subphase. It’s experimentally shown that the electric field may affect significantly on the monolayers formation of fatty acids: manolayr’s loosening occurs when a deionized water is used as a subphase; manolayr’s consolidation is observed when water solutions of inorganic salts are used as a subphase. An electric field can be significant technology factor of the Langmuir monolayer’s formation process.
