Materials Literature
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We report nanotags encapsulated in Au-Ag nanostructure that are active in surface-enhanced Raman scattering. The Au-Ag nanoshells are filled with Ag via citrate reduction, entrapping label molecules in the process. The nanotags can be used for quantitative SERS measurements with the label molecules as internal referen…
A new class of fluorescent organogelators, pyrene-containing poly(arylene ether sulfone)s, showed two fluorescence switching modes in different gelation solvents. The THF gel exhibited excimer emission due to dimerization of the pyrene groups. In contrast, excimer emission was quenched after gelation in MC because of…
We report photoluminescence (PL) modulation of quantum dots (QDs) by photoinduced electron transfers from acridine-1,8-dione derivative surface ligands. Reversible PL switching upon many repeated cycles was demonstrated, as alternating on and off of the UV excitation for the surface ligand has successfully resulted in…
A comprehensive investigation on the formation mechanism of gold nanoparticles (AuNPs) in colloidal mixture obtained from the reduction of chloroauric acid (HAuCl4) solution using a single reducing agent (sodium citrate; process-I), (tannic acid; process-II), and a combination of two reducing agents (sodium citrate pl…
The reaction of Mn(HCOO)(2)·2H(2)O, (t)BuSaoH(2) (3,5-di-tert-butyl-salicylaldoxime) and sodium azide in isopropanol leads to [NaMn(3)((t)BuSao)(6)] (1). Its structure can be described as a linear trinuclear cluster bridged by oximato ligands. Magnetic investigation revealed that the ferromagnetic coupling interaction…
Anode supported solid oxide fuel cells (SOFCs) with varying Ni content in the anode function layer (AFL) were fabricated and investigated. The observed open circuit potential (OCP) was higher with lower Ni content. However, the highest maximum power densities (MPDs) in the low temperature range, from 450 to 650°C, wer…
The employment of pyridine-2-carbaldehyde oxime (paoH) in zinc(II) benzoate chemistry, in the absence or presence of azide ions, is described. The syntheses, crystal structures and spectroscopic characterization are reported for the complexes [Zn(O(2)CPh)(2)(paoH)(2)] (1), [Zn(12)(OH)(4)(O(2)CPh)(16)(pao)(4)] (2) and…
We show that low energy tunneling electrons can excite propagating surface plasmons in gold nanowires. The separation of excitation and outcoupling proves that the tunneling electrons excite gap plasmons that subsequently couple to propagating plasmons.
Immobilization of functional proteins such as enzymes on solid surfaces produces a variety of effects ranging from the reversal and strong inhibition to the enhancement of protein stability and function. Such effects are protein-dependent and are affected by the physical and chemical properties of the surfaces. Functi…
Polyaniline (PANI) is doped with poly(acrylic acid-co-maleic acid) (PAMA) containing HCl to obtain PANI-PAMA film. Ultraviolet-visible spectroscopy results confirm the doping of PANI with PAMA and HCl. A scanning electron microscopy image reveals that the film is composed of highly porous nanowires. Platinum (Pt) part…
Improvement on the quality of kaolin has been conducted by treatment with different concentrations of hydrochloric acid. The raw and treated clays were analysed for SiO2, Al2O3, TiO2, K2O, Fe2O3, and MgO using energy dispersive x-ray fluorescence. The physical change in colour from pink to white as the concentration i…
The thermal degradation behaviour of uncrosslinked and crosslinked chitosan membranes were studied by means of dynamic thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) over the temperature range 25-500oC in nitrogen atmosphere. Modified chitosan membranes were prepared using a crosslinking…
Diverse types of steels have found application in industry owing to their ability to form passive films resistant to the electrochemical corrosion. However, the presence of microorganisms in the production environment can cause undesired corrosion of metals. Therefore, any information on the chemical structure of corr…
Ti-29Nb-13Ta-4.6Zr (TNTZ) is a very attractive material for biomedical applications because of its low Young's modulus. However, this alloy contains a certain amount of rare-metals elements. In this study, Ti-Fe-Nb-Zr system alloys were developed by substituting Fe for Ta as the low cost β stabilizer, and the mechanic…
ORGANIC COATINGS ARE PRIMARILY APPLIED TO aircraft for environmental protection and appearance. Reference [1] concludes, “The rate controlling parameter for the corrosion of aircraft alloys, excluding the mechanical damage factor, is the degradation time of the protective coating system.” This clearly indicates the im…
The impacting compression test of coal rock was made by 75 mm Split Hopkinson Pressure Bar(SHPB) under different strain rates.The results show that the characters of coal rock are complicated and dispersed.Under lower strain rate,the specimens presents an axial cleaving failure mode,while under higher strain rate,the…
This chapter summarizes the “state of the art” in the exploitation of various environmentally-friendly synthesis strategies, reaction precursors and conditions to manufacture metal and metal oxide nanoparticles in the most widely followed ‘bottoms-up’ approach. The use of various organisms, such as plants, bacteria, f…
目合と網糸直径の異なる高強力ポリエチレン（ダイニーマ）を材料とする綟網の流体力特性を回流水槽実験によって調べた。流れに直角に置かれたダイニーマ綟網の抗力係数 CD90 は，ナイロンおよびクレモナ綟網に比べてそれぞれ 8 % と 25% 小さく，流れに平行な場合の綟網の抗力係数 CD0 は材質による差がほとんどない結果を得た。また綟網の CD90 と CD0 はレイノルズ数と網目係数を変数とした実験式で，流れに任意な角度に置かれた綟網の抗力係数と揚力係数は，CD90，CD0 と迎角 θ を変数とした実験式で表すことができた。
The reduction kinetics of FeTiO3 powder by hydrogen has been studied. According to the isothermal reduction experiments at the temperatures of 1023 K, 1073 K, 1123 K and 1173 K, it was found that the reduction products were mainly Fe and TiO2. During the reduction process, chemical reaction was found to be the rate co…
Caesalpinia pulcherrima (Linn) popularly known as Peacock flower in India belongs to family Caesalpiniace. In this work, we describe environment friendly technique for green synthesis of gold nanoparticles from AuCl4 solution using the Caesalpinia pulcherrima (Peacock flower) flower extract as reducing agent. The gold…