Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Although spider silks have been studied for decades, the assembly properties of the underlying silk proteins have still not been unravelled. Previously, the detection of amyloid-like nanofibrils in the spider's silk gland suggested their involvement in the assembly process.Recombinantly produced spider silk also self-…
Epitaxial self-assembled quantum dots (SAQDs) represent an important step in the advancement of semiconductor fabrication at the nanoscale that will allow breakthroughs in electronics and optoelectronics. In these applications, order is a key factor. Here, the role of crystal anisotropy in promoting order during early…
We examine the T=0 phase diagram of a thin ferromagnetic film with a strong out-of-plane anisotropy in the vicinity of the reorientation phase transition (with Co on Pt as an example). The phase diagram in the anisotropy-applied field plane is universal in the limit where the film thickness is the shortest length scal…
We investigate electron-phonon couplings, scattering rates, and mean free paths in zigzag-edge graphene strips with widths of the order of $10\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$. Our calculations for these graphene nanostrips show both the expected similarity with single-wall carbon nanotubes (SWNTs) and the suppr…
Three different microbial wild-type strains are compared with respect to their potential as industrial scale polyhydroxyalkanoate (PHA) producers from the feed stock whey lactose. The halophilic archaeon Haloferax mediterranei as well as two eubacterial strains (Pseudomonas hydrogenovora and Hydrogenophaga pseudoflava…
Ultrafine-grained materials are attractive for achieving superplastic elongations provided the grains are reasonably stable at elevated temperatures. Since the strain rate in superplasticity varies inversely with the grain size raised to a power of two, a reduction in grain size to the submicrometer level leads to the…
This letter reports a simple and versatile approach for extracting bionanofibers from natural materials using the ultrasonic technique. Bionanofibers have been fabricated from various materials, e.g., spider and silkworm silks, chitin fibers, collagen, cotton, bamboo, and ramee and hemp fibers. The obtained nanofibers…
A ZnO nanowire behaves like a rectifier under bending strain, as demonstrated by its current–voltage characteristics (see graph). This is interpreted with the consideration of a piezoelectricity-induced potential energy barrier at the interface of the conductive tip and nanowire (see schematic). Under appropriate bend…
BACKGROUND: Neuroblastoma, a frequently occurring solid tumour in children, remains a therapeutic challenge as existing imaging tools are inadequate for proper and accurate diagnosis, resulting in treatment failures. Nanoparticles have recently been introduced to the field of cancer research and promise remarkable imp…
We investigate the influence of a well-defined reversible biaxial strain $\ensuremath{\leqslant}0.12%$ on the magnetization $(M)$ of epitaxial ferromagnetic manganite films. $M$ has been recorded depending on temperature, strain and magnetic field in $20--50\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ thick films. This is…
The authors report results of transport studies on high quality, fully epitaxial BiFeO3 thin films grown via pulsed laser deposition on SrRuO3∕DyScO3 (110) substrates. Ferroelectric tests were conducted using symmetric and asymmetric device structures with either SrRuO3 or Pt top electrodes and SrRuO3 bottom electrode…
Abstract For several decades, engineered coatings have been used to protect steel from corrosion. Many formulas were made and tested for their ability to prevent corrosion. Changes in the formulas would include different resins, pigments, solvents and additives. In this paper, we will talk about three specific pigment…
The dynamics of driven spin boson model is studied analytically by means of the perturbation approach based on a unitary transformation. We gave the analytical expression for the population difference and coherence of the two level system. The results show that in the weak driven case, the population difference presen…
The magnetic coupling between single Co atoms adsorbed on a copper surface is determined by probing the Kondo resonance using low-temperature scanning tunneling spectroscopy. The Kondo resonance, which is due to magnetic correlation effects between the spin of a magnetic adatom and the conduction electrons of the subs…
Abstract Magnetically separable ordered mesoporous carbon with Fe3O4 nanoparticles, which were grafted on the outer surface of the mesoporous carbon material CMK-3, was prepared through a facile route. The catalytic performance for hydrogenation of cyclohexene to cyclohexane validates the mesoporous nanocomposite mate…
The electronically unsaturated platinum−osmium complex Pt 2 Os 3 (CO) 10 (P t Bu 3 ) 2, 3, has been obtained from the reaction of Os 3 (CO) 10 (NCMe) 2 with Pt(P t Bu 3 ) 2 . Compound 3 adds hydrogen at 0 °C to yield the dihydrido complex Pt 2 Os 3 (CO) 10 (P t Bu 3 ) 2 (μ-H) 2, 4 (93% yield) within 10 min and subsequ…
Abstract A dielectric response by an intermolecular –N···H···O–proton transfer was observed around 120 K for (Chloranilic acid)(1,2-Diazine)2 [CA(1,2-DA)2]. This response, observed on the way of the migration from N–H···O at 300 K to O–H···N below 90 K, was demonstrated by infrared absorption spectra and the temperatu…
A molecular dynamics simulation (MD) of a generic model for polymers adsorbed on a discrete surface is presented. We investigate the effect of surface roughness on the film's diffusion constant, its influence on aging, and other properties. The model reproduces many experimentally observed features such as logarithmic…
The contrasting photophysical properties of two silicon (IV) tetraphenylporphyrins, Si(TPP)(py)2 and Si(TPP)Cl2, have been investigated using static absorption and fluorescence spectroscopy and ultrafast transient absorption measurements. The parent Si(TPP)Cl2, in which the porphyrin macrocycle has its normal 2- oxida…
Conditional photofragmentation is achieved with binary systems incorporating the isophthaloyl bis-aminopyridine barbiturate recognition motif and dithiane- or trithiane-based photolabile modules, which cleave only in the presence of an external sensitizer. The components of the host-guest molecular recognition pair we…