Materials Literature
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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…
Hydrogels containing divinyl sulfone (DVS)-crosslinked hyaluronan (HA) (hylans) are potentially useful implant biomaterials because of their non-cytotoxicity and -antigenicity. However, to successfully fulfill their intended role in vivo, their properties (e.g., mechanics, pore size, surface topography, hydrophilicity…
Abstract An efficient yellow-emitting phosphor, Eu2+-doped Ba2Mg(PO4)2, is reported. Its excitation band is extending from 250 to 450 nm, which is adaptable to the emission band of near-UV LED chips (350–420 nm). Upon 367-nm light excitation, the phosphor exhibits a strong yellow emission centered at 576 nm. A bright…
Electronic structure calculations were performed to examine the origin of a band gap present in most 18-electron half-Heusler compounds and its absence in NaTl. In these compounds of diamond-like structures, the presence or absence of a band gap is controlled by the sigma antibonding between the valence s orbitals, an…
Abstract A stable biomimetic superhydrophobic surface on magnesium alloy was fabricated by microarc oxidation pretreatment and followed by chemical modification based on lotus effect. The as-prepared surface showed an interesting micro- and nanoscale binary structure, exhibiting a good superhydrophobic property with a…
Changes in the crystal growth mechanism were observed in pseudo-dewetted, thin layers of low molecular weight (MW) poly(ethylene oxide) (PEO) on a hydrophilic mica surface. The studies were conducted using two PEO fractions (HPEO and MHPEO) with similar MW's (number-average MW of around 4500 g/mol) but different end-g…
The hemocompatibility of polymeric vascular implants is in part dependent on the propensity of fibrinogen to adsorb to the implant surface. Fibrinogen surface adsorption was measured in real time using a quartz crystal microbalance with dissipation monitoring (QCM-D). Six new, biodegradable tyrosine-derived polycarbon…
The effect of isovalent chemical substitution of Eu3+ into the Tb3+ sites on the magnetic and electrical properties of (Tb1-xEux)MnO3 (0 </= x </= 1.0) system has been investigated. The orthorhombic structure with space group Pbnm is observed in this series of materials. An increase in Mn-O bond distance with increasi…
We investigate the cooperative behavior of two carbene additions to a (5,5) armchair single-walled carbon nanotube (SWNT) and find that in certain configurations, double additions are more stable than uncorrelated distant double additions by 7 to 24 kcal/mol. We also find certain configurations to be very unstable. We…