Materials Literature
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Despite its importance, little is known about how complex deformation modes alter the intrinsic electronic states of carbon nanotubes. Here we consider the rippling deformation mode characterized by helicoidal furrows and ridges and elucidate that a new intralayer strain effect rather than the known bilayer coupling a…
The stationary phase-dependent regulatory protein (SdrP) from the extremely thermophilic bacterium, Thermus thermophilus HB8, a CRP/FNR family protein, is a transcription activator, whose expression increases in the stationary phase of growth. SdrP positively regulates the expression of several genes involved in nutri…
Advanced first-principles calculations uncover the emergence of multiferroicity in antiferromagnetic ${\text{Pr}}_{0.5}{\text{Ca}}_{0.5}{\text{MnO}}_{3}$ upon structural transition to a low-symmetry electrically polarized structure, found to be the ground state according to total energy. The electric polarization is n…
Hyperbranched polymers with ( N, N -diethylamino)dithiocarbamoyl (DC) units as peripheral groups (HBP-DC) spontaneously form nanospheres in aqueous silver nitrate. Although HBP-DC itself is insoluble in water, coordination of Ag(I) ions to surface DC units imparts cationic charges which make Ag(I)/HBP-DC complexes dis…
The mineral phase of shell repair in the Manila clam Venerupis philippinarum affected by brown ring disease (BRD) was characterised at various scales and at various stages of shell repair by confocal Raman microspectrometry and scanning electron microscopy. Spherulitic and quadrangular aragonite microstructures associ…
Abstract Porous Nylon 6 nanofibers were prepared using silica nanoparticles as the template. Firstly, Nylon 6/silica composite nanofibers were prepared as precursors by electrospinning Nylon 6 solutions containing different contents of silica nanoparticles. Scanning electron microscopy (SEM) and transmission electron…
Abstract This work presents the application of the free solution electrophoresis method (FSE) in the metallic / semiconductive (M/S) separation process of the surfactant functionalized single-walled carbon nanotubes (SWCNTs). The SWCNTs synthesized via laser ablation were purified through high vacuum annealing and sub…
Blue phase (BP) stability is dependent upon chemical structure as well as the physical properties of the chiral nematic liquid-crystal (LC) mixture. In this study, the dependence of blue phase temperature range on alkyl chain length was investigated in order to evaluate the relationship between blue phase stability an…
We report photodetection in a very large spectral bandwidth, which encompasses ultraviolet, visible and near infrared, using graphene inks or graphene inks functionalized with either gold or silver nanoparticles, or gold nanoparticles further encapsulated with bovine serum albumin deposited on interdigitated electrode…
The synthetic compounds of Sb 3+ ion‐substituted lanthanide aluminum garnet doped with cerium powders have been prepared by solvothermal method at 230°C and then calcined at 1500°C. These particles have spherical morphology with an average size of about 2 μm, which indicates the good luminescent characteristics. Tb 3…
采用静电纺丝法制备了孔径为40~150 nm的PLLA纳米孔结构超细纤维，纳米孔不仅分布在纤维表面，而且存在于纤维内部.通过扫面电镜观察了纤维表面形貌.探讨了混合溶剂二氯甲烷/N,N二甲基甲酰胺的比例、PLLA浓度、电场强度对PLLA纤维纳米孔大小、分布密度、深度的影响.结果表明通过调节PLLA溶液性质和纺丝参数，PLLA纤维的表面形貌可以在3种状态即光滑无孔、疏浅凹坑、密集深孔之间可控.二氯甲烷/N,N二甲基甲酰胺比例为1∶4，PLLA浓度9%，电场强度1 kV/cm，环境温湿度分别为30℃和52%，静电纺丝所得PLLA超细纤维表面孔洞直径为150 nm，孔洞分布密集.纳米孔PLLA纤维形成的主要机理是由于静电纺丝过程中溶剂…
A radiological survey has been carried out in the island of Ikaria based on the natural radionuclide inventory in abiotic environment and the consequent dose rate assessment for the critical groups of population. The island of Ikaria-Aegean Sea, Greece is characterised by the presence of mineral and thermo-mineral spr…
Abstract High‐performance hyperbranched poly(phenylene oxide)‐modified bismaleimide resin with high thermal stability, low dielectric constant, and loss was developed, which is made up of hyperbranched poly(phenylene oxide) (HBPPO), 4,4′‐bismaleimidodiphenylmethane (BDM), and o, o′‐diallylbisphenol A (DBA). The curing…
Research on four types of self-assemblies (micelles, coacervates, gels, and vesicles) is discussed via a particular investigative methodology (in order of appearance): kinetics, dynamic NMR, PGSE-NMR, double-(13)C labeling, molecular dynamics computations, phase diagrams, cryo-HRSEM, rheology, light/electron microscop…
Size dependence effects in semiconductor clusters have been a subject of extensive studies for the last two decades. However, it is still difficult to employ the existing theoretical models to give reliable results of energies for clusters in the whole nanometer region. Here we offer a new theoretical method for the q…
We have carried out a systematic investigation of encapsulation of Al n clusters for n = 1−13 inside armchair single walled carbon nanotubes (SWCNTs)(m,m) of varying diameter using density functional theory calculations. The effect of confinement was studied on the Al n geometries which shows linear structures for n ≤…
Lead‐free piezoelectric ceramics of 0.94(K 0.5 Na 0.5 )NbO 3 –0.06LiNbO 3 (0.94KNN–0.06LN) were prepared by an ultrasonic irradiation method. X‐ray diffraction, thermal analyses, and X‐ray photoelectron spectroscopy were used to evaluate the effects of different ultrasonic powers on the structural and electrical prope…
Lead sulfide (PbS) nanoparticles have been synthesized in aqueous solutions by a reaction between inorganic lead salts and sodium sulfide and stabilized using the cationic polyelectrolytes branched poly(ethylenimine) (PEI), poly(allylamine hydrochloride) (PAH), and poly(diallyldimethylammonium chloride) (PDDA). The st…
This study evaluates an alternative to electron-beam lithography for fabricating nanoscale graphene devices. Dip-pen nanolithography is used for defining monolayer graphene flakes and for patterning of gold electrodes through writing of an alkylthiol on thin films of gold evaporated onto graphene flakes. A wet gold et…
Self-assembled, chair-shaped dirhenium(I) macrocyclic compounds featuring the two different bis-chelating quinone dianions (1, L = dhnq(2-); 2, L = dhaq(2-); H(2)dhnq = 6,11-dihydroxy-5,12-naphthacenedione; H(2)dhaq = 1,4-dihydroxy-9,10-anthraquinone) that interface with two fac-Re(CO)(3) cores and a ditopic semirigid…