Materials Literature
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On the basis of density functional theory (DFT) calculations thermoelectric properties are derived for Sb-doped skutterudites MPt$_4$Ge$_{12-x}$Sb$_x$ with M=Ba,La,Th. It is predicted that the originally very small absolute values of Seebeck coefficients $|S|$ of the undoped compounds is increased by factors of 10 or…
The thickness dependence of the magnetic properties of amorphous Fe90Zr10 layers has been explored using Fe90Zr10/Al75Zr25 multilayers. The Al75Zr25 layer thickness is kept at 40 Å, while the thickness of the Fe90Zr10 layers is varied between 5 and 20 Å. The thickness of the Al75Zr25 layers is sufficiently large to su…
Inkjet printing has been used to fabricate glucose sensors using glucose oxidase and screen printed carbon electrodes. By appropriate selection of printing and drying conditions we are able to fabricate sensor structures that show a good linear response to glucose concentration. In order to achieve these structures we…
Staying at a B ′N′ B: A highly symmetric cyclic structure in which N donor and B acceptor sites are alternating (see picture) is found for the first ambipolar π-conjugated B–N macrocycle. The donor–π–acceptor arrangement results in mutual interactions between B and N and a pronounced solvatochromic effect on the emiss…
A marine alga Caulerpa racemosa was tested for its anticorrosion potential against mild steel in 1 M HCl solution by weight loss and electrochemical methods such as potentiodynamic polarization and electrochemical impedance spectroscopic studies at various temperatures viz., 303, 313, and 323 K. The results showed tha…
Multiferroic materials: A novel class of multiferroics based on organic–inorganic hybrid materials is synthesized. The ferromagnetic properties originate from the coordination network, whereas the ferroelectricity results from the polar organic ions (see picture, M=magnetization and P=polarization).
Antimicrobial properties of chitosan (CH) coatings and CH enriched with bioactive compounds (BC) and essential oils (EO) were determined by in vitro and in vivo assays on minimally processed broccoli. The efficiency of CH plus BC/EO in improving the safety of broccoli was tested against the native microflora. Also, it…
The negatively charged nitrogen-vacancy (${\mathrm{NV}}^{\ensuremath{-}}$) center in diamond is an attractive candidate for applications that range from magnetometry to quantum information processing. Here we show that only a fraction of the nitrogen (typically $<0.5$%) incorporated during homoepitaxial diamond gro…
Using deftly designed and fabricated devices combining nitrogen-vacancy centers with on-chip heating and thermometry components, a group at University of California, Santa Barbara, expand the measurement, understanding, and control of single spins in the NV centers into a broad thermal range spanning from room tempera…
Atomically thin molybdenum disulfide is emerging as a new nanomaterial with potential applications in the fields of electronic and photonics. Charge carrier dynamics plays an essential role in determining its electronic and optical properties. We report spatially and temporally resolved pump-probe studies of charge ca…
We explore numerically the shear rheology of soft repulsive particles at large volume fraction. The interplay between viscous dissipation and thermal motion results in multiple rheological regimes encompassing Newtonian, shear-thinning, and yield stress regimes near the "colloidal" glass transition when thermal fluctu…
We demonstrate the use of a catecholic anchor (Dopa) for selective modification of the inner surface of an halloysite clay nanotube. Aqueous Dopa binds to alumina at the tube lumen and does not bind the silica surface under the same conditions. Selectivity of surface modification was evidenced using X-ray photoelectro…
Abstract A chemical approach to controlling the work function of few‐layer graphene is investigated. Graphene films are synthesized on Cu foil by chemical vapor deposition. Six metal chlorides, AuCl 3 , IrCl 3 , MoCl 3 , OsCl 3 , PdCl 2 , and RhCl 3 , are used as dopants. The sheet resistance of the doped graphene dec…
The structural and elastic properties of orthorhombic black phosphorus have been investigated using first-principles calculations based on density functional theory. The structural parameters have been calculated using the local density approximation (LDA), the generalized gradient approximation (GGA), and with severa…
Abstract Polydopamine is the first adhesive polymer that can functionalize surfaces made of virtually all material chemistries. The material‐independent surface modification properties of polydopamine allow the functionalization of various types of medical and energy devices. However, the mechanism of dopamine polymer…
For nearly a decade, researchers have debated the mechanisms by which AgNPs exert toxicity to bacteria and other organisms. The most elusive question has been whether the AgNPs exert direct "particle-specific" effects beyond the known antimicrobial activity of released silver ions (Ag(+)). Here, we infer that Ag(+) is…
Abstract Mn-doped In 2 O 3 films were deposited on Si (1 0 0) substrates by the RF-magnetron sputtering technique. The influence of Mn-doping concentration on the local structure and degree of p–d hybridization was investigated by x-ray absorption spectroscopy at the Mn K-edge and L 2,3 -edge. The results show that Mn…
A large number of MnO2 nanowires were fabricated by a facile hydrothermal method. The nanowires have a tetragonal pyrolusite structure and a smooth surface. The common bulk defects such as dislocations, twinnings and stacking faults are not detected by HRTEM measurement. The magnetisation dependence of temperature ind…
Co(II) ion-doped poly vinyl alcohol (PVA)-capped zinc selenide (ZnSe) nanoparticles are prepared at room temperature by a conventional chemical method. The prepared sample is characterised by X-ray diffraction; optical, FT-IR studies and different physical parameters are evaluated using the measured values of refracti…
Specific heat measurements have been performed on polycrystalline HoCo2, ErCo2 and their solid solutions Ho1−x Er x Co2 (0.1≤x≤0.5). These compounds were synthesized using high-purity rare-earth metals and cobalt. X-ray diffraction patterns taken at room temperature reveal that all compounds have the C15 cubic Laves p…