Materials Literature
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A re-investigation of the crystal structure of quadratite, ideally AgCdAsS 3 , was undertaken using a single crystal from the type locality, Lengenbach, Binntal, Switzerland. The average of five electron microprobe analyses led to the empirical formula (Ag 0.994 Cd 0.738 Pb 0.231 Cu 0.006 Tl 0.005 Mn 0.003 Fe 0.004 Zn…
We report measurements of X-ray powder diffraction, vibrational study, the differential scanning calorimetry (DSC), and the electric properties of a made-up [C6H9N2]2CuCl4 sample. The alternative current (ac) conductivity of the compound [C6H9N2]2CuCl4 has been measured in the temperature range 356–398 K and the frequ…
Abstract We investigated the spikes on the outer shell surface of the endolithic gastrochaenid bivalve genusSpengleriawith a view to understand the mechanism by which they form and evaluate their homology with spikes in other heterodont and palaeoheterodont bivalves. We discovered that spike formation varied in mechan…
The Phase-Field Crystal (PFC) model represents the atomic density as a continuous function, whose spatial distribution evolves at diffusional, rather than vibrational time scales. PFC provides a tool to study defect interactions at the atomistic level but over longer time scales than in molecular dynamics (MD). We exa…
Quantum dot solids, in which individual quantum dots (QDs) such as CdSe, PbSe, and InP QDs are assembled into 3 dimensions, have been paid much research interest due to their potential applicability to diverse optoelectronic fields.1,2 Silicon QDs whose electric transitions are direct-like due to the relaxation of k c…
以Bi(NO 3 ) 3 ·5H 2 O、NH 4 VO 3 、Cu(NO 3 ) 2 ·3H 2 O为原料, 采用水热法合成了Cu-BiVO4光催化剂, 并利用X射线衍射(XRD)、扫描电镜(SEM)、X射线光电子能谱(XPS)、紫外漫反射(UV-Vis)等测试手段对催化剂进行了表征. 结果表明, 提高前驱液pH值, 可得到单斜晶系白钨矿型Cu-BiVO 4 光催化剂, BiVO 4 的晶型结构并未随着Cu掺入量的增加而改变. 光催化剂中的Cu元素以CuO和Cu 2 O的形式存在. Cu的引入使可见光吸收带发生红移, 吸收强度明显提高. 可见光催化降解亚甲基蓝溶液的结果表明, Cu掺杂有利于提高BiVO 4 的活性. 其中pH值…
Shape Memory Alloys (SMAs) can recover up to 6% of induced strain, undergo an increase in elastic modulus of over 100%, and generate large levels of stress through a temperature and stress-dependent transformation between their martensite and austenite phases.In this research, SMAs are embedded within an aluminum matr…
This work compares the electrodeposition behavior of thin films of manganese dioxide produced from solutions of four commonly available Mn(II) salts; namely, sulfate, chloride, nitrate and acetate, as well as their corresponding acids. The deposition behavior is investigated in terms of the masses of the thin films pr…
Abstract In an effort to study the role of strain rate response on the tribological behavior of metals, room temperature experiments were conducted by sliding commercially pure titanium and a-iron pins against an H-11 die steel flats of various surface textures. The steel flat surface textures were specifically prepar…
Metal-directed macrocyclic assembly has been a remarkable research area in the realm of supramolecular chemistry. Over the past few decades, metal-directed self-assembly has proven to be a powerful tool in the synthesis of well-defined multimetallic architectures with increasing structural complexity based on metal−li…
Cellulose-graft-poly (L-lactide) (cellulose-g-PLLA) was successfully prepared via ring-opening polymerization (ROP) by using 4-dimethylaminopyridine (DMAP) as an organic catalyst in an ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl). The structure and morphology of the polymer was characterized by nuclear m…
Plasmonic nanopatterned structures that can work as highly efficient surface-enhanced Raman scattering (SERS) substrates are presented in this study. A “coupled” concentric ring structure has been designed, fabricated, tuned, and compared to an “etched” concentric ring structure and plain gold film via SERS experiment…
The effluents of textile dyes act as hazardous aqueous pollutants. Acid blue15 (AB), acid green 1 (AG), acid orange 52 (AO), acid red 88 (AR), acid red 28 or direct red (DR), basic blue 6 (BB), basic blue N (BBN), basic green 4 (BG), reactive brilliant red X-5B (RBR) are the dyes chosen and studied in the present work…
We focused on hydrolytic degradation kinetics at 310 and 343 K in phosphate buffer to compare PLA and PHB kinetic profiles. Besides, we revealed the kinetic behavior for copolymer PHBV (20 % of 3-hydroxyvalerate) and the blend PHB-PLA (1:1). The intensity of biopolymer hydrolysis is characterized by total weight lost…
Short range periodic ripples in graphene have been modeled. The electronic properties of the rippled graphene have been investigated using first-principles calculations. Compared with flat graphene, there is a band gap opening in rippled graphene. Generally, the value of energy gaps increases as the height of ripples…
Differences between chromate conversion coatings and sol–gel coatings formed on aluminium and aluminium–copper alloys are highlighted with respect to the formation of cracks, the effect of the substrate composition on coating thickness and the influence of curing in air on coating re‐growth. For sol–gel coatings, it i…
Three-dimensional porous nickel foam was used as a current collector to prepare a Co-Ni oxide/Ni foam electrode for a supercapacitor. The synthesized Co-Ni oxide was proven to consist of mixed oxide phases of $Co_3O_4$ and NiO. The Co-Ni oxide/Ni foam electrode prepared was characterized by morphological observation,…
Abstract Black, shiny crystals of the molecular cluster compounds (Te10)[M(TeX4)(TeX3)]2 (M/X = Rh/Cl (1), Ir/Br (2)), (Te10)[Ru(TeI4)(TeI2)]2 (3), (Te10)[M(TeI4)(TeI2)]2(TeI4)(Te2I2) (M = Rh (4), Ir (5)) as well as the one‐dimensional cluster polymer (Te10I2)[Ir(TeI4)]2(Te4)I2 (6) were synthesized by melting reaction…
A shape memory alloy (SMA) is expected to be applied as intelligent material since it shows the unique characteristics of the shape memory effect and superelasticity. Most SMA elements, with these characteristics, perform cyclic motions. In these cases, fatigue of SMA is one of the important properties in view of eval…
To circumvent the limitations of polyethylene glycol (PEG) modified carriers, a photo-triggerable liposome was prepared which was modified by cholesterol derivatives via a cleavable vinyl ether linkage so that the PEGylated coating can be efficiently removed by a photoactivated fullerene. After the photocleavage of th…