ChemInform Abstract: The Physical Properties of Supramolecular Peptide Assemblies: From Building Block Association to Technological Applications
Abstract Review: 50 refs.
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ChemInform Abstract: Nanogold Plasmonic Photocatalysis for Organic Synthesis and Clean Energy Conversion
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ChemInform Abstract: Hydrothermal—Thermal Conversion Synthesis of Hierarchical Porous MgO Microrods as Efficient Adsorbents for Lead(II) and Chromium(VI) Removal.
Abstract MgO microrods with hierarchical porous structure (ranging from micropores to meso‐ and macropores) and well‐defined rod‐like morphology are prepared via a flux (NaCl) and surfactant (nonylphenol polyoxyethylene ether, NP‐9) directed thermal decomposition (porcelain boat, 650, 2 h) of hydrothermally grown MgC2…
Implementação de protótipo de resfriador termoelétrico por efeito Peltier aplicado a dispositivos semicondutores de potência
In any electrical or electronic circuit, thermal energy is a quantity that is always present and generally must be considered in the specifications of any application. In many cases, the heat from the Joule effect, as well as from other internal and irreversible losses, represent the biggest share of maximum heat that…
Computer modelling of steel quenching for industrial purpose
Optimization of the process parameters of the steel quenching can be accomplished by considering achievement of desired mechanical properties distribution, achievement of required component shape, by prevention of cracking, minimizing of distortion and realization of desired residual stress distribution. Thermo-metall…
Propagation de fissures chargées en tension dans des matériaux fortement hétérogènes
The development of predictive tools that bridge microscopic to macroscopic scales in brittle fracture is the key challenge of this thesis.In the context of quasi-static planar crack propagation under mode I loading, it has been shown, using first-order weight-function perturbation approaches that, for weak heterogenei…
Big Data of Materials Science - Critical Role of the Descriptor
Statistical learning of materials properties or functions so far starts with a largely silent, non-challenged step: the choice of the set of descriptive parameters (termed descriptor). However, when the scientific connection between the descriptor and the actuating mechanisms is unclear, causality of the learned descr…
Compósitos ferro-grafita para componentes de motores com propriedades tribológicas melhoradas.
A constante busca por motores com maior eficincia energtica, requer a introduo de novos materiais ou inovaes nas rotas de fabricao dos materiais existentes.
Emergence of magnetic order in the Rare Earth Intermetallic PrPtAl
Magnetism of the rare earth intermetallics present some of the most important challenges for understanding correlated electron systems . In this thesis I distil this immense challenge, to understanding the unusual magnetic properties of the rare earth intermetallic PrPtAl. At first glance, PrPtAl appears to be a typic…
Molecular semiconductors based on transition metal complexes
The field of organic, or molecular, electronics is currently dominated by both polymeric \nand molecular organic materials, while considerably less research efforts are devoted to \ntransition metal based complexes. Despite this, such compounds can offer advantages \nincluding additional tuneability of the spatial dis…
Synthesis of supperparamagnetic CoFe2O4 with chitosan-g-PEG copolymer coating for the biomedical applications
Result: Monodisperse particles, high colloidal stability and superparamagneticproperties were observed, by using the simple method with the certain molar concentration of Co2+ in 3M NaOH at 100°C. The design of NP surface was done by grafting an appropriate amount of PEG onto the TMC backbone based on structure and ph…
Fe-based new superconductors
Abstract This chapter discusses superconducting iron-based pnictides such as LaFeAsO1 - xFx. It presents experimental results for the doping dependence of the structural, magnetic, and superconducting phase transitions. It also gives results for superconducting transition temperature Tc and critical magnetic fields on…
INFLUENCE OF THE ALLOYING OF FILM-FORMING MATERIAL MGF2 ON OPERATIONAL PROPERTIES OF COATINGS
The structure and properties of film-forming material MgF2 containing oxide impurity are studied. Material shows a low level of adaptability to manufacture in the course of the thermal evaporation in vacuum and operational parameters of received coatings. Heat treatment with application as the fluorinating agent (NH4)…
VẬT LIỆU KHUNG CƠ KIM (MOFs): CÁC ỨNG DỤNG TỪ HẤP PHỤ KHÍ ĐẾN XÚC TÁC
Vật liệu khung hữu cơ-kim loại (MOFs) được tạo thanh từ cac cầu nối hữu cơ va cac tâm kim loại (lam điểm kết nối). MOFs co những tinh chất độc đao như co cấu truc tinh thể, diện tich bề mặt rieng lớn, khung cấu truc linh động, co thể thay đổi kich thước, hinh dạng lỗ xốp va đa dạng nhom chức hoa học ben trong lỗ xốp.…
Undercutting the surface keeps liquids at bay
Repellent Surfaces![Figure][1] PHOTO: EGDIGITAL/THINKSTOCK The shape of an umbrella is designed both to protect the holder from falling droplets and to have the collected rainwater flow away from the person underneath. Liu and Kim exploited the idea of an umbrella to make materials with a
Storing Deformation Energy of ZnO fine wires in a Mechanical Battery
The characterizations for ZnO arrays on different substrates have been done with the aim of fabricating an experimental battery that uses the strain energy as energy source. The storage principle is based on a common spring which is loaded by the force associated to the energy to be harvested. By following the same pr…
ВЛИЯНИЕ РЕЖИМОВ ТЕРМИЧЕСКОГО ВОССТАНОВЛЕНИЯ НА ФОРМИРОВАНИЕ, УСТОЙЧИВОСТЬ И КАТАЛИТИЧЕСКИЕ СВОЙСТВА ПОЛИМЕРСТАБИЛИЗИРОВАННЫХ НАНОЧАСТИЦ ПАЛЛАДИЯ В РЕАКЦИИ СЕЛЕКТИВНОГО ГИДРИРОВАНИЯ АЦЕТИЛЕНОВЫХ СПИРТОВ
Thermal destruction of palladium acetate at temperatures ranging from 200 to 325 °C in an industrial hypercrosslinked polystyrene MN-270 was investigated by TGA and XPS and described in this article. The studies have shown that the palladium acetate distributed into hypercrosslinked polystyrene collapses with forming…
PtCoCr/C ЭЛЕКТРОКАТАЛИЗАТОРЫ ДЛЯ ТОПЛИВНЫХ ЭЛЕМЕНТОВ C ПРОТОНПРОВОДЯЩИМ ПОЛИМЕРНЫМ ЭЛЕКТРОЛИТОМ
There were works to develop the advanced catalyst systems (PtCoCr/C) with a core-shell structure, where the core – a metal alloy, and the shell is rich in platinum. The works were made in Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences. Reduction of surface coverage of Pt in the shell…
Estudio optofluídico del ensanchamiento de poros en membranas de alúmina nanoporosa
En este trabajo se utiliza una técnica optofluídica para estudiar el ensanchamiento químico de los poros de membranas de alúmina nanoporosa. La técnica optofluídica consiste en medir la evolución de la reflectancia de luz láser producida por la membrana durante la imbibición capilar de la misma con un líquido de propi…
КАТАЛИТИЧЕСКОЕ СНИЖЕНИЕ АВТОМОБИЛЬНЫХ ВЫБРОСОВ СО ПРИ ХОЛОДНОМ ЗАПУСКЕ ДВИГАТЕЛЯ
Vehicle emissions are the major contributor of one of the most poisonous gas, CO. It not only affects human beings and vegetation but also affect environment. It indirectly contributes to global warming. Cold-start phase aggravates its emission to about 60–80 % even if the vehicle is equipped with a TWC. Thus, the tar…