Lev B. Matyushkin

Saint Petersburg Electrotechnical University (ETU) · micro- and nanoelectronics

Clinical experience indicates that enhanced level of heat shock protein 70 (Hsp70) and p53 correlates with poor prognosis due to malignant cell overexpression of these proteins in tumor progression. Cadmium selenide quantum dots (QDs) were synthesized in aqueous solution using mercaptopropionic acid and L-cysteine (L-Cys) as ligands. They were conj...

Purpose. In this work, we investigated the possibility of modifying porous silicon with silver particles. Methods and methodology. For the synthesis of substrates was used the method of electrochemical etching in hydrofl uoric acid solutions. Аt given technological parameters was formed a porous matrix. The resulting samples were subjected to furth...

The published works representing the current state of research in the field of the synthesis and application of zinc stannate are reviewed. The data on crystalline modifications of ZnSnO3 are provided and the primary areas of the application of zinc stannate are investigated. Options of various synthesis methods, such as chemical vapor deposition,...

В работе приведен обзор публикаций, отражающих современное состояние исследований в области синтеза и применения станната цинка. Приведены данные о кристаллических модификациях ZnSnO3 и рассмотрены основные области применения станната цинка. Показаны возможности различных методов синтеза, таких как химическое осаждение из паровой фазы, реакции под...

Представлены результаты исследования наноструктурных оксидных материалов, перспективных для использования в микро-, нано- и оптоэлектронике. Также рассматриваются вопросы создания новых газочувствительных структур на основе наноструктурированных материалов.

Методом терагерцовой спектроскопии во временной области исследованы пленки металлоорганического галогенидного перовскита CH3NH3PbI3 , который в настоящее время рассматривается как перспективный базовый материал для солнечных элементов нового поколения, а также пленки, содержащие нанокристаллы неорганического галогенидного – свинцово-йодного – перов...

Получены светоизлучающие органические полевые транзисторы (СИ−ОПТ) на основе композитных пленок, состоящих из нанокристаллов перовскита (CsPbBr3) пленок, состоящих из нанокристаллов перовскита (CsPbBr3), внедренных в матрицу сопряженного полимера−полифлуорена (PFO), и исследованы их электрические и оптические свойства. Выходные и передаточные вольт...

Films of CH3NH3PbI3 organometallic perovskite, which is currently considered as a promising basic material for new-generation solar cells, as well as films containing CsPbI3 inorganic lead–halid perovskite nanocrystals, have been studied in the spectral range of 0.2–2.9 THz at room temperature by terahertz time-domain spectroscopy. Several low-freq...

The electric, piezoelectric, and optical properties of colloidally synthesized CsPbBr3 nanocrystals (NCs) are studied by combined scanning probe microscopy and optical spectrometry. It is found that the CsPbBr3 NCs have a cubic shape with an edge length of 10 nm. When deposited on a substrate, these NCs gather into faceted agglomerates up to severa...

The influence of electromagnetic radiation with maxima wavelengths of 455, 520 and 630 nm on silver nanoparticles growth was investigated. The corresponding possibility of the plasmon resonance spectrum reconstruction in the visible range is shown. Investigations of the radiation frequency influence on the shape and size of the particles both at th...

В работе представлены результаты ИК-термографических исследований нанопористых пленок оксида алюминия с различными геометрическими параметрами пористого слоя (толщиной, средним диаметром пор), подвергавшихся воздействию теплового излучения. Показано, что такие пленки экранируют тепловое излучение. Полученные результаты свидетельствуют о том, что ме...

This paper presents results of thermographic studies of nanoporous alumina films having different geometric parameters of their porous layer (thickness and average pore diameter), which were exposed to thermal radiation. The films have been shown to shield thermal radiation. The present results suggest that nanoporous alumina membranes can be used...

We have studied the influence of monodisperse Ag/SiO2 core-shell-type nanoparticles with a core diameter of 17 nm and a dielectric-shell thickness within 0-40 nm on the photoluminescence of CdSe/ZnS quantum dots (QDs) excited by laser at a wavelength corresponding to the plasmon resonance in Ag/SiO2 nanoparticles. It is established that the intensi...

Исследовано влияние монодисперсных наночастиц структуры ядро/оболочка Ag/SiO2 с диаметром ядра 17 nm и толщиной диэлектрической оболочки в диапазоне 0−40 nm на фотолюминесценцию квантовых точек CdSe/ZnS при возбуждении лазером с длиной волны, соответствующей плазмонному резонансу частиц Ag/SiO2. Продемонстрировано увеличение интенсивности люминесце...

The effect of ascorbic acid additions on the growth mechanism of thin PbSe films produced by hydrochemical deposition has been studied by atomic force microscopy (AFM). A fractal analysis of AFM images of the lead selenide films has shown that their formation follows the “cluster–particle” aggregation mechanism. The fractal dimension assessed by th...

We demonstrate the optical orientation and alignment of excitons in a two-dimensional layer of CsPbI$_3$ perovskite nanocrystals prepared by colloidal synthesis and measure the anisotropic exchange splitting of exciton levels in the nanocrystals. From the experimental data at low temperature (2K), we obtain the average value of anisotropic splittin...

The influence of gamma radiation of a 137 Cs source on the photoluminescence of perovskite CsPbBr3 nanocrystals is reported in this study. Stability of photoluminescence in perovskite CsPbBr3 nanocrystals is compared with commercial samples of CdSe/ZnS nanocrystals. The results suggest the possibility of using CsPbBr3 nanocrystals as biomarkers in...

The approach to synthesize one-dimensional photonic SiO2–TiO2 crystals by sol–gel methods is developed. Using the method of transfer matrices, structures consisting of 13 layers of alternating materials having the properties of one-dimensional photonic crystals with the minimal transmission coefficient of 7% in the photonic band gap range and that...

An automatic apparatus for the preparation of thin-film coatings by successive ionic layer deposi-tion is presented. The basic design, engineering, and operating parameters of the apparatus are the specimen-positioning accuracy with respect to the phase boundaries of 10 μm, a substrate speed in the solution of 0.5-3 mm/s, and a temperature range of...

One-dimensional multilayer structures of the periodically alternating low refractive index (silica) and high refractive index (titania) materials have been deposited by sol–gel spincoating. The possibility of creating an optical filter by introducing a structural defect in the form of a layer of double thickness is shown theoretically and experimen...

Layer-by-layer deposition of nanostructured perovskites cesium lead halide thin films is described. The method of deposition is based on alternate immersion of the substrate in the precursor solutions or colloidal solution of nanocrystals and methyl acetate/lead nitrate solution using the device for deposition of films by SILAR and dip-coating tech...

CsPbX3 (X = Cl, Br, I) quantum dots were synthesized using hot-injection method at various temperatures (50–200°C), resulting in quantum dots size change and corresponding photoluminescence shift. During anion exchange, continuous formation of intermediate solid solutions was observed resulting in fine adjustment of photoluminescence peak position....

Plasmonic core/shell nanoparticles Ag/SiO2 with different shell thicknesses were synthesized. Localized plasmon resonance was investigated by UV-vis spectroscopy. Arranged layers of plasmonic nanoparticles and quantum dots were obtained on a quartz substrate using a spin-coating technique. Plasmon-enhanced photoluminescence excited by 405 nm laser...

We have designed and investigated electrical and optical properties of solution-processed organic field-effect transistors (OFETs) based on conjugated polymer PFO and perovskite –cesium lead halide nanocrystals (CsPbI3) composite films. It was shown that OFETs based on PFO:CsPbI3 films exhibit current-voltage (I-V) characteristics of OFETs with dom...

The paper is devoted to infrared thermography studies of nanoporous alumina membranes with various geometric parameters of the porous layer: its thickness and average pore diameter. Thermal radiation shielding by anodic alumina membranes is presented. The result obtained showed that nanoporous alumina membranes can be used as heat shields to smooth...

Дано описание лабораторно-практических работ по образованию фракталов, золь-гель-технологии, атомно-силовой микроскопии, измерению газочувствительных структур с иерархией пор, анализу удельной поверхности порошковых и пористых материалов методом тепловой десорбции, исследованию перколяционных переходов и нанокомпозитов с магнитными капсулированными...

A technique for synthesizing gas-sensing copper-oxide layers by layer-by-layer deposition onto glass and plastic substrates is considered. Deposition is based on the oxidation of a copper–ammonia complex by hydrogen peroxide. Layers synthesized at various numbers of deposition cycles are studied by atomic-force microscopy and transmission spectrosc...

An installation diagram for the study of nanomaterials using scattering indicatrices has been presented. It has been shown that the suggested procedure allows the online investigation and control of the synthesis of nanomaterials, as exemplified by the preparation of SiO2 by the Stöber method and chemical bath deposition of the lead sulfide PbS lay...

Synthesis and also the structural and photoluminescence properties of nanocrystals with natural faceting of the " cesium–lead–halogen " system with crystalline structure of the perovskite type are examined. The possibility of continuously changing the position of the maximum in the photoluminescence spectrum in the wavelength range of 400–700 nm is...

Рассмотрены синтез, структурные и фотолюминесцентные свойства нанокристаллов с естественной огранкой системы” цезий−свинец−галоген“ кристаллической структуры типа перовскит. Показана возможность непрерывной перестройки максимума спектра фотолюминесценции нанокристаллов в диапазоне длин волн 400−700нм. Исследованы особенности образования непрерывных...

The peculiarities of the formation of porous membranes based on aluminum oxide obtained by the electrochemical anodization of aluminum foil with the preset topological parameters of pores-capillares (20– 220 nm) have been studied. The methods to study the membranes based on nanoporous aluminum oxide are proposed. The developed nanoporous material p...

The transmission spectra for the porous alumina membranes prepared by electrochemical etching were investigated in a broad wavelength range from 0.2 to 12 μm. It is shown that the spectrum of the membrane maybe divided into regions enabling characterisation of average pore size and size distribution, the membrane thickness, and the presence of resi...

The purpose of this research is to develop an automated method of synthesizing quantum dot nanocrystals and plasmonic nanoparticles using segmented flow rector synthesis as a new alternative to the batch method of synthesizing nanoparticles. A reactor was successfully applied to the synthesis of colloidal solutions of semiconductor (CdSe) and metal...

Colloidal nanocrystals of CuInS2 and CuInSe2 were synthesized in an apolar noncoordinating medium using 1-dodecanethiol as a ligand. A semiconductor shell of ZnS was formed for CuInS2 nanocrystals obtained by the injection method. The obtained samples were characterized by absorption spectroscopy and photoluminescence.

Изучены особенности формирования пористых мембран на основе оксида алюминия электрохимическим анодированием алюминиевой фольги с заданными топологическими параметрами пор-капилляров (20—220 нм). Предложены методы исследования мембран на основе нанопористого оксида алюминия. Созданный нанопористый материал обладает свойствами экранирования ИК излуче...

Рассмотрена методика синтеза газочувствительных слоев оксидов меди, полученных путем послойного осаждения на стеклянные и полимерные подложки по реакции окисления молекул аммиачного комплекса меди перекисью водорода. Слои, синтезированные при различном количестве циклов наслаивания, исследованы методами атомно-силовой микроскопии и спектроскопии пр...

The layer-by-layer deposition technique for metal oxide thin films from solutions of complex compounds is proposed and considered by examples of copper and titanium oxides from ammonia copper and titanium citrate-peroxide complexes as sources respectively. The films were deposited on glass substrates and flexible substrates made of polyester. The r...

Zinc oxide films and aluminum doped zinc oxide films were prepared by specially designed apparatus for ultrasonic spray pyrolysis. Atomization of precursor solution was produced using an ultrasonic transducer at resonant frequency 1.7 ± 0.085 MHz. The resulting films thickness is less than 400 nm, average roughness is about 40 nm, and transmittance...

One-dimensional multilayer structures of periodically alternating low refractive index (silica) and high refractive index (titania) materials have been deposited by a solgel spin coating technique. These structures have been characterized by visible-near-IR spectroscopy with different angles of incident light falling. As an example, theoretical and...

Представлена автоматизированная установка, позволяющая методом ионного наслаивания получать тонкопленочные покрытия. Основные конструктивные и технико-эксплуатационные параметры: точность позиционирования образца по отношению к границе фаз 10 мкм, скорость под-ложки в растворе 0.5–3 мм/с, температурный диапазон 25–90°C. Установка апробирована при п...

Experimental variation of the droplets form in the flow of immiscible fluids in a capillary with the inner diameter of 0,9 mm is presented. The possibility of the transition from continuous to segmented flow by varying the velocity of precursors and carrier liquids is demonstrated. It is shown that the rate of variation of one precursor in respect...

Abstract—A synthesis of 1-dodecanetiol stabilized colloidal quantum dots of CuInSe2 exhibiting photoluminescence in the range of 700–900 nm has been described. The effect of the shell on the energy levels of electrons in CuInSe2–ZnS and CuInSe2–ZnSe core–shell quantum dots has been investigated by quantum mechanical calculations.

One-dimensional multilayer structures of periodically alternating low refractive index (silica) and high refractive index (titania) materials have been deposited by sol-gel spincoating. Experimental spectra of the structures are in agreement with spectra calculated by transfer matrix technique. As an example, theoretical and experimental spectra wi...

This research presents an automated method of synthesizing semiconductor and metal nanoparticles using flow rector synthesis as a new alternative to the batch method of synthesizing nanoparticles. Experiments were carried out to determining the optimal flow rates of reagents droplets. The reactor was successfully applied to the synthesis of colloid...

Рассмотрена роль углеродных и родственных слоистых материалов в современной наноэлектронике. Дана классификация современных углеродных материалов. Показаны потенциальные возможности их использования в приборных и технологических реализациях с учетом возникающих физических эффектов и явлений. Проведен анализ физико-химических аспектов получения совр...

Nanoparticles of silver and cadmium selenide are obtained by the method of synthesis in a flow of immiscible liquids (water/toluene, water/dodecane); these nanoparticles manifest, respectively, the effects of plasmon resonance and the spatial confinement of charge carriers. The reactor used is a polytetrafluoroethylene capillary with temperature-co...

This research presents an automated method of synthesizing semiconductor and metal nanoparticles using flow rector synthesis as a new alternative to the batch method of synthesizing nanoparticles. Experiments were carried out to determining the optimal flow rates of reagents droplets. The reactor was successfully applied to the synthesis of colloid...

One-dimensional multilayer structures of periodically alternating low refractive index (silicon oxide) and high refractive index (titanium oxide) materials have been deposited by sol–gel spin-coating. These structures have been characterized by atomic force microscopy,ellipsometry and visible–near IR spectroscopy with different angles of incident l...

Processes of lead sulfide film forming from aqueous solutions are considered. Two main stages of such film growth are highlighted. It is shown that the first stage can be used to produce arrays of lead sulfide quantum dots. Keywords—chemical bath deposition; processes of film growth; lead sulfide; nanostructure films of lead sulfide; polycrystal...

Cadmium sulfide thin films have been deposited by successive ionic layer adsorption and reaction method from ethanol-aqueous solutions. The films were deposited on glass substrates. The cadmium sulfide films have been characterized by transmission spectra. Thicknesses of layers were found by AFM microscopy of partially etched film. Keywords—ionic...

Методом синтеза в потоке несмешивающихся жидкостей(вода/толуол, вода/додекан)получены наночастицы серебра и селенида кадмия, проявляющие соответственно эффекты плазмонного резонанса и пространственного ограничения носителей заряда. В качестве реактора используется капилляр из политетрафторэтилена с контролируемой температурой отсеков нуклеации и ро...

Membrane-bound 70-kDa heat shock protein (mHsp70) is over-expressed in malignant brain tumors and therefore can be used for development of the novel molecular targeting approaches for earlier detection of the tumors. For targeting mHsp70 on the tumor cells anti-Hsp70 monoclonal antibodies were conjugated with superparamagnetic iron oxide nanopartic...

Due to such features as tunability of photoluminescence (PL) spectrum, high quantum yield, extensive absorption band and superior photostability colloidal quantum dots (QDs) are considered to be an alternative to conventional organic fluorophores in bioimaging. While common binary semiconductor nanocrystals for the visible range, such as cadmium [1...

Colloidal quantum dots (QDs) of cadmium selenide are synthesized in non-polar media and in aqueous media. Setup for colloidal QDs synthesis is described. Absorption and photoluminescence (PL) spectra of CdSe QDs are presented. The size of nanoparticles can be estimated as being less than 3 nm. The self-organization processes in ordering of PbS QDs...

Nearly monodisperse cadmium selenide quantum dots (QDs) were synthesized in non-coordinating solvent octadecene through phosphine-free method using oleic acid as surfactant. Selenium powder suspension in octadecene obtained by ultrasound processing was used as one of precursor solutions. Influence of multiple selenium precursor injections on nanocr...

The CdSe and ZnSe:Mn colloidal quantum dots (QDs) have been synthesized in order to use them as a contrast agent for bioimaging. The synthesis of QDs was made in the aqueous solution. These compounds are fluorescent semiconductor nanoparticles and are held to be promising fluorophores which can be used as an important research tool in biology and m...

The study is dedicated to obtaining and investigation of lead sulphide – cadmium sulphide based layers. The paper data of thermodinamical analyses of Pb–S–O, Cd–S–O system are reported. It is shown that in case of lead sulphide oxidizing the appearance of Pb nanoparticles is possible; in case of cadmium sulphide oxidizing, the most probable oxygen...

A review of the up-to-date methods of semiconductor colloidal quantum dots synthesis for application in biology and medicine as well as summary of sensors based on colloidal quantum dots and metal nanoparticles are presented. The principles of sensors interaction with biological objects are examined.

Due to tunable luminescence and absorption spectra, high quantum yield, compatibility with various technologies and materials colloidal quantum dots (QDs) are attracting much interest in various fields of science and engineering, such as light emitting devices, photovoltaics and catalysis. Because of superior photostability compared to organic fluo...

CdSe is the most common material used for preparation of visible light emitting quantum dots (QDs) [1]. Due to toxicity of cadmium in biological applications of QDs alternative materials have to be considered. Zinc chalcogenides (ZnS, ZnSe) doped with 3d transition metal atoms can be used for creation of colloidal QDs emitting in the visible wavele...

Наноструктуры на основе оксида цинка являются перспективными для развития современных электронных устройств благодаря их уникальным электрическим и оптическим свойствам. Исследованные в данной работе проводящие пленки были синтезированы двумя методами – спрей-пиролизом и химическим осаждением из газовой фазы при низком давлении. Результаты, получен...

We propose a method of high-temperature synthesis of nanoparticles in a flow reactor as replacement for popular «hot injection» synthesis of semiconductor nanocrystals in a glass flask. The main advantages are possibility of continuous nanoparticles production, great technique flexibility for different materials and lower cost of the final products...

Zinc oxide nanostructures are promising candidates for the development of novel electronic devices due to their unique electrical and optical properties. Zinc oxide films were obtained by two methods (spray pyrolysis and low pressure chemical vapor deposition) and were investigated by scanning electron microscopy and atomic-force microscopy. Obtain...

A flow reactor nanoparticle synthesis technique is proposed as replacement for «hot injection» synthesis of semiconductor nanocrystals in a glass flask. The main advantages are possibility of continuous nanoparticles production, technology flexibility and lower cost of the final products in comparison with currently applied methods.

A flow reactor nanoparticle synthesis technique is proposed as replacement for «hot injection» synthesis of semiconductor nanocrystals in a glass flask. The main advantages are possibility of continuous nanoparticles production, technology flexibility and lower cost of the final products in comparison with currently applied methods.

Приведен обзор этапов развития оптической флуоресцентной микроскопии. Рассмотрены методы флуоресцентной микроскопии, обеспечивающие получение разрешения на наноуровне, включая методы 4Pi микроскопии, STORM, STED, PALM, а также основные принципы нелинейных оптических методов для микроскопической диагностики и применения в медико-биологических исслед...

Содержит систематизированные и оформленные в виде лабораторных работ оригинальные методики синтеза и диагностики наноструктурированных материалов, разработанные на кафедре микро- и наноэлектроники СПбГЭТУ «ЛЭТИ» и в лабораториях ФТИ им. А. Ф. Иоффе РАН. Предназначен магистрантам направления № 28.04.01 «Нанотехнологии и микросистемная техника», маг...

Наноструктуры на основе оксида цинка являются перспективными для развития современных электронных устройств благодаря их уникальным электрическим и оптическим свойствам. Исследованные в данной работе проводящие пленки были синтезированы двумя методами – спрей-пиролизом и химическим осаждением из газовой фазы при низком давлении. Результаты, получен...

Для решения практических задач представлен вариант модификации исследовательских установок с применением технологии экструзионной печати ABS пластиком. Получены спектры фотолюминесценции флуоресцентных пластиков, используемых в 3D-печати. An empowerment option for luminescence spectra apparatus using the 3D-printing of ABS-plastic extrusion techno...