Materials Literature
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In this study, we prepared microscale periodic rough structures consisting of parallel strips on a silicon surface. The width of each strip was equal to the gap between the strips, and the silicon surface was silanized with perfluorooctyltrichlorosilane. We studied the wetting characteristics of water drops as they ad…
Using an electron microprobe, we measured and characterized the Nd 3+ ion diffusion across a boundary between Nd doped and undoped ceramic yttrium aluminium garnet (YAG) for different temperature ramps and hold times and temperatures. The results show significant Nd ion diffusion on the order of micrometres to tens of…
A series of coil−rod−coil triblock copolymers (i.e., F3T8EO8, F3T8EO17, F3T8EO45, and F3T8EO125 ) with a mesogenic monodisperse conjugated oligomer comprising 3 fluorene, 8 thiophene, and 2 phenyl units as the rod and poly(ethylene oxide) (PEO) as the coil were synthesized. A reference compound, that is F3T8ME2, with…
With the combination of the Fourier synthesis method and the time-dependent linear stability analysis, a simple model was developed to describe the dynamic evolution of the initial interface instability. By using this simple model, the early instability stage of a planar interface during directional solidification of…
Metal oxide sols (ZnO, SnO 2, TiO 2, ZrO 2, Fe 2 O 3, NiO, Ga 2 O 3, MnO 2, In 2 O 3, CeO 2 ) were prepared by hydrolysis of chloro-alkoxo or acetylacetonato complexes, preventing precipitation. The sols were injected in a solution of tetradecene and an aliphatic amine at 160 °C and heated at the resulting temperature…
Abstract Polypyrrole (pure) and polypyrrole doped with different protonic acids (HCl and H 3 PO 4 ) have been synthesized using NaOH as reducing agent in aqueous HCl medium and ammonium persulphate (APS) as an oxidant, respectively. These pure and doped samples were named as S1, S2, and S3 for further investigations.…
Ammonia has long been known to be useful in the treatment of flue/tail/stack gases from industrial furnaces, incinerators, and electric power generation industries. In this study, urea hydrolysis for production of ammonia, in different application areas that require safe use of ammonia at in situ condition, was invest…
Cu doped ZnO and MgZnO ceramics were created via a process of cold pressing and annealing, and their optical properties and phonon dynamics were studied. It was found that the ceramics exhibit infrared absorption peak energies at 5783 and 5822 cm−1, indicative of intraband transitions in a substitutional Cu ion of oxi…
Abstract Silver nanoparticles are obtained through immersion plating of porous Si in AgNO 3 solutions and thermal decomposition of Ag nitrate in oxidized pSi. The efficiency of nanostructures as Surface Enhanced Raman Scattering substrates is checked on a Cyanine dye evidencing detectable concentrations as low as 10 –…
We report bidirectional direct-current electroluminescence (EL) from i-MgxZn1−xO/n-ZnO/SiOx double-barrier heterostructures on Si. When the heterostructure-based device is forward biased with negative voltage applied on Si, ultraviolet (UV) emission is more intense than visible emissions. The visible emissions appear…
For materials containing fluorine, it has been generally accepted that fluorinated segments or end groups tend to aggregate in the outer surface because of the low surface energy, which endows the fluorinated materials with special surface properties such as self-cleaning, superhydrophobicity, and so forth. However, f…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Y.-H. A. Wang, A. Gupta, M. Chshiev, W. H. Butler; Induced half-metallicity in Cr-based ferromagn…
Recent experimental and computational advances have clearly established the importance of the linear alkylthiolate−Au−alkylthiolate (RS−Au−SR) complex at the interface between the thiolate groups and the gold surface. By using density functional theory-based first principles method, here we show that the elementary di…
We performed temperature-dependent neutron pair distribution function (PDF) analysis on relaxor ferroelectric ${[\text{Pb}({\text{Zn}}_{1/3}{\text{Nb}}_{2/3}){\text{O}}_{3}]}_{1\ensuremath{-}x}{[{\text{PbTiO}}_{3}]}_{x}$ $(\text{PZN-}x\text{PT})$ ($x=0.05$ and 0.12) from 550 to 150 K. The experimental PDF spectra clea…
Abstract Enders' N‐heterocyclisches Carben (NHC) dehydriert den Ammoniak‐Boran‐Komplex mit einer vergleichsweise niedrigen Aktivierungsbarriere zu NH 2 BH 2 und NHC‐(H) 2 . Ein Nickel‐NHC‐Katalysator im Reaktionsmedium zersetzt das gebildete NHC‐(H) 2 in H 2 und freies NHC, das wiederum Ammoniak‐Boran‐Komplex dehydrie…
A new pyran-based CTD monomer, allyl 2-(2,6-bis(( E )-4-(dimethylamino)styryl)-4 H -pyran-4-ylidene)-2-cyanoacetate ( 2 ), was successfully synthesized by Knoevenagel reaction. Copolymerization of 2 with styrene (St), methyl methacrylate (MMA), and acrylonitrile (AN) afforded copolymers with different polarity, P(St-…
Abstract In this study, the preparation of a new class of amphiphilic block copolymers consisting of a poly(phthalaldehyde) (PPA) block and hydrophilic poly(alkylene oxide) blocks is described. PPA was prepared by ionic cyclopolymerization. A telechelic polymer block was prepared by endcapping of the PPA by a bifuncti…
Superlinear-variation in short circuit photocurrent with increasing incident optical power has been observed in metal-insulator-semiconductor structures having a silicon rich oxinitride active layer containing silicon nanocrystals. A model has been elaborated where an internal gain mechanism explains the superlinear p…
The biomimetic formed solution of collagen reconstituted films into native fibers proved to be of high interest because of its regenerative medical applications. A variety of tests to characterize the mechanical properties of biomimetic engineered films are illustrated in this paper. Based on our previous results, the…
We investigate the behavior of liquid crystal dynamic flow in a cell with a bidirectional alignment (BDA) surface. Numerical simulations show that with a BDA surface having a pitch comparable to the cell gap d, the liquid crystal dynamic flow direction can be controlled by the driving voltage. Such an effect can be ap…