Materials Literature
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Resumo Encontram-se muitos exemplos na literatura onde se faz suposições relativas às tensões residuais que raramente são confirmadas na prática. Para validar esse enunciado, neste trabalho é apresentada uma visão crítica sobre o assunto através de uma revisão bibliográfica. Verificou-se uma série de resultados antagô…
A broadband two-layer transparent metamaterial unit is proposed as a absorber at X-band, Ku-band and K-band. The transparent soda-lime glass and indium tin oxide (ITO) film were used to design the transparent metamaterial absorber unit. In the case of both TE-polarization and TM-polarization, a high absorption, more t…
CdSe and CdTe-based semiconductor fluorescent nanocrystals, also called quantum dots (QDs), attract the attention of biologists due to their wide range of emission in a visible light interval, high fluorescence quantum yield and photostability. However, their application is limited because of possible toxicity of cadm…
The Flame pyrolysis method used to synthesize carbon nanotubes was studied in this work. In order to improve the quality of synthesized carbon nanotubes, it is important to change the corresponding natures of the catalyst. Two catalyst preparation methods, namely, the sol-gel method and the impregnation method, were c…
In this study, ammonium aluminum carbonate hydroxide (AACH) rods were controllably prepared using the hydrothermal method by manipulating the amount of urea in the reaction system. The experimental results showed that AACH in rod shape was able to be gradually transformed from γ-AlOOH in cluster shape during the molar…
Synthetic polymers are widely researched for their use in tissue engineering. Control in size, surface area, pore size, and elasticity are the biggest advantages of using a man-made polymer. However, often the polymers are hydrophobic (do not encourage cell attachment); hence, it is hugely challenging to integrate the…
Tunable complementary split ring resonators (CSRRs) based on monolayer graphene are presented in terahertz regime. By applying different gate voltage, the Fermi level and optical conductivity of monolayer graphene pattern can be changed. Here, we employ a numerical simulation to study the interaction of light with gra…
The magnetic material of Manganese Ferrite (MnFe 2 O 4 ) based on natural Iron sand have been successfully prepared by using co-precipitation method. The natural Iron sand, MnCl 2 .4H 2 O, HCl and NH 4 OH were used as raw materials to synthesize the MnFe 2 O 4 . The synthesis was carried out at various temperatures of…
Biosynthesis of nanoparticles has acquired particular attention due to its economic feasibility, low toxicity and simplicity of the process. Extracellular synthesis of nanoparticles by bacteria and fungi has been stated to be brought about by enzymes and other reducing agents that may be secreted in the culture medium…
Experiments have confirmed that the efficiency of wastewater disinfection using the ultrasonic cavitation is ensured by taking into account the size and structure of microorganisms. The intensity of ultrasonic vibrations is shown to influence the specified process. The recommendations for constructing ultrasonic cavit…
In the present work, we investigate the structural and elastic properties of a new intermetallic hydride compound Mg 3 CuH 0.6 . The theoretical study has been carried out based on density functional theory (DFT), within local density approximation (LDA) and generalized gradient approximation (GGA). The calculated str…
MEMS capacitance diaphragm gauge with a full range of (1∼1000) Pa is considered for its wide application prospect. The design of pressure-sensing diaphragm is the key to achieve balanced performance for this kind of gauges. The optimization process of the pressure-sensing diaphragm with island design of a capacitance…
Multi-liposomal containers were prepared via electrostatic adsorption of 50 nm anionic liposomes on the surface of cationic chitosan nanoparticles (nanogels) 270 nm in diameter. The containers are stable in aqueous-salt solutions but degrade in the presence of proteolytic enzymes down to 10–15 nm particles and release…
Wearable supercapacitors (SCs) printed on T-shirts are demonstrated as a new class of aesthetically unitized power source with exceptional design versatility and flexibility. The SC-printed T-shirts presented by Sang-Young Lee and co-workers in article number 1705571, show great potential as an effective, scalable ele…
A method was developed to prepare sulfur nanoparticles (nanosulfur) via reaction between sodium thiosulfate and sulfuric acid in the presence of water-soluble poly-N-vinylpyrrolidone (PVP) with different molecular weights. Polymeric hydrogel ointments were prepared from agar-agar, PVP, poly(ethylene glycol) solutions…
Encenicline hydrochloride (Enc-HCl) crystallizes in four different monohydrate phases, but at the same time crystallization in a nonsolvated phase is not observed, indicating that water plays a crucial role in guiding the crystallization process and ensuring structure stability. All monohydrate phases show exceptional…
ABSTRACT Organo-kenyaites were prepared from a cetyltrimethylammonium hydroxide (C16TMAOH) solution and solid sodium kenyaite (Na 2 Si 22 O 45 .10H 2 O) mixture. The effect of the initial cetyltrimethylammonium solution on the structure of the intercalated materials was investigated by CHN analyses, X-ray diffraction…
It is hoped that this special
polymorphism plays an important role
An elephant digests only around 30~45% of what it consumes; therefore the undigested material mainly passes as intact fibres. Elephant food is usually composed of grass, leaves, twigs, bark, fruit and seed pods. This research aimed to utilize the elephant dung fibers as material for composite board and citric acid as…