Materials Literature
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Abstract In this paper, the effect of low concentrated alkaline solutions etching on texturized silicon structures at low temperatures has been studied. The silicon samples have been previously etched either from regular arrays by HF anodization on prepatterned substrates or by Deep Reactive Ion Etching (DRIE). After…
Abstract Investigations of the morphology of the surface of PbSe/CaF2/Si(111) epitaxial structures after anodic electrochemical etching in a Norr electrolyte with anodizing current density of 2‐8 mA/cm2 and duration of 10‐20 min were performed. Two possible morphology types of PbSe nanostructured surficial porous laye…
The fabrication and nonlinear optical imaging of ~ 5-nm-sized lead sulfide (PbS) nanoscale particles prepared in a water-soluble polymer matrix is reported. The two photon excitation fluorescence (TPEF) studies (using Ti:Sapphire laser, λex~ 706 nm, P = 400 mW, pulse ~ 80 fs) clearly show the foremost band-edge and as…
We have assessed the potential of self-assembling hydrogels for use in conformal displays. The self-assembling process can be used to alter the transparency of the material to all visible light due to scattering by fibres. The reversible transition is shown to be of low energy by differential scanning calorimetry. For…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionHigh Glass-Transition Temperature and Organosoluble Novel Arylene Ether PolymersW. Y. Huang*, B. R. Liaw, M. Y. Chang, Y. K. Han, and P. T. HuangCite this: Macromolecules 2010, 43, 24, 10747Publication Date (Web):November 23…
Crystal structure of Li 2 BaSiO 4 was reinvestigated by laboratory X-ray powder diffraction. The title compound was hexagonal with space group P 6 3 c m , Z =6, unit-cell dimensions a =0.810 408(2) nm, c =1.060 829(4) nm, and V =0.603 370(3) nm 3 . The initial structural model was successfully derived by the direct me…
The SWIFTS integrated waveguide device (Stationary Wave Integrated Transform Spectrometer) has been designed on top of a 1D parallel array of 50-nm-width single stripe Superconducting Nanowire Single Photon Detectors (SNSPD). Colored light, around 1.55-μm wavelengths, is introduced inside PE-CVD deposited and patterne…
Abstract In this paper, space charge distributions as well as dielectric properties, such as volume resistivity and AC breakdown strength, were studied in low‐density polyethylene (LDPE) and its composite obtained by adding nano‐ZnO nanofiller, before and after photo‐oxidation or corona aging for several days. It was…
Abstract In this work we study the role of fluorine for the selective suppression of porous silicon in localized SOI applications. The formation of porous silicon can be done selectively by controlling the Fermi level in areas to be etched or not etched, which is typically done by adjusting the level of doping. Implan…
A useful procedure is described to rapidly obtain Bragg-reflection intensities from the FULLPROF suite, and the Bragg intensities can then be input into the GEST and the PECKCRYST programs for crystal-structure determination of small molecules. An example on using the new procedure for the structure determination from…
We performed an extensive characterization of Co-doped polycrystalline 122 iron pnictide samples, Ba(Fe1-xCox)2As2withx=0.07, 0.09, 0.1, 0.12, by means of high-fielddcmagnetization andac1st and 3rd harmonic susceptibility response measurements. FromM(H) loops through the Bean model formula both the magnetic field andT…
The title compound, [Mn(C(16)H(14)N(2)O(2))(NCO)], is a monoclinic polymorph of the previously published ortho-rhom-bic form [Lu et al. (2006 ▶). Inorg. Chem.45, 3538-3548]. The Mn(III) ion is chelated by a tetra-dentate Schiff base ligand and coordinated by the N atom of a cyanate ligand in a distorted square-pyramid…
In this study, Pt-Sn incorporated mesoporous silicate materials were synthesized and characterized, and their activities in ethanol electro-oxidation reaction were tested by cyclic voltammetry. Two groups of catalysts were prepared. In the first group, Pt@MCM-41 and Pt-Sn@MCM-41 were prepared by impregnation of Pt and…
An analytical study has been performed on Cu surfaces rubbed with Rulon, which is a polytetrafluoroethylene (PTFE)-based composite, in order to explain the dramatic reduction in wear of rails and armatures conditioned with Rulon. Electron and optical spectroscopies and microscopies demonstrated that conditioned surfac…
Abstract Abstract – The AC electrical characterization of Au/porous silicon/p‐Si structure is presented. The low porosity porous silicon layers were prepared by electrochemical etching in p‐type silicon 〈100〉 with two resistivities. The AC electrical measurements capacitance–conductance–frequency were performed from 5…
The structure of the title compound, (C(12)H(24)N)(2)[Sn(2)(C(6)H(5))(4)(C(2)O(4))(3)(H(2)O)(2)], consists of a bischelating oxalate ion, located on an inversion center, which is linked to two SnPh(2) groups. The coordination sphere of the Sn(IV) ion is completed by a monochelating oxalate anion and a water mol-ecule.…
Abstract Mesoporous silicon, achieved by etching of a highly n‐doped wafer is used as template for electrochemical metal deposition. The fabrication of porous silicon samples with a porous layer on each side is performed in a double tank electrolytic cell in applying a pulsed current with a frequency of typically 0.1…
SmBa2Cu3O7(SmBCO) coated conductors were grown on IBAD-MgO templates the evaporation using a drum-in-dual-chambers (EDDC) deposition system. The material showed a critical temperature of 93 ~ 94 K and a critical current of 200 ~ 250 A/cm-width at 77 K in a self-field. The current-limiting properties and local structur…
Abstract Metal‐particle‐assisted hydrofluoric acid etching of silicon (Si) is a unique method of preparing Si nanopores with metal nanoparticles at the bottom of each nanopore. Autocatalytic electroless deposition, which is the conventional method to metalize nonmetallic substrates, requires catalyzation of the substr…
Abstract Nature has evolved mechanisms to create a diversity of specialized materials through nanoscale organization. Inspired by nature, hybrid materials are designed with highly tailorable properties, which are achieved through careful control of their nanoscale interactions. These novel materials, based on a silica…