Materials Literature
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Abstract Thin polycrystalline ZnO films are deposited onto Si (100) substrates by means of DC reactive sputter deposition from a Zn target in an argon–oxygen mixture. The influences of the oxygen content in the mixture and of the total gas pressure in the reactor during deposition as well as of applying postgrowth ann…
Abstract Response surface methodology was used to study the process optimization of cationic percentage through grafting diallyldimethylammonium chloride (DADMAC) into cassava starch. Based on Box–Behken design, quadratic models were developed to correlate the synthesis variables: concentration of DADMAC (A), concentr…
We report an innovative application of a true “bottom-up” approach for preparation of functional material. Three consecutive self-assembly steps were utilized for formation of a complex surface enhanced Raman spectroscopy (SERS) platform. First the Langmuir–Blodgett technique was used to deposit gold nanoparticles on…
The chiral bicyclic diguanidinium chloride 1 forms gels in aromatic apolar solvents. The gels were characterized at different levels of organization, from the macroscopic to the molecular level by using microscopy, spectroscopy, and powder X-ray diffraction. The dependency on chirality has been highlighted by circular…
Since gold clusters have mostly been studied theoretically by using DFT calculations, more accurate studies are of importance. Thus, small neutral and anionic gold clusters (Au(n) and Au(n)(-) , n = 4-7) were investigated by means of coupled cluster with singles, doubles, and perturbative triple excitations [CCSD(T)]…
We demonstrate here that thiol-ene chemistry can be used to provide side-chain functionalized monomers based on 3,4-propylenedioxythiophene (ProDOT) containing ionic, neutral, hydrophobic, and hydrophilic side chains. All reactions gave high yields and purification could generally be accomplished through precipitation…
A specific criterion is often used to judge the transition from Cassie-Baxter wetting state to that of Wenzel. In this work, we examine the applicability of this specific criterion to the case of micropillars with circular or polygonal cross-sections. For this purpose, we derive an angle inequality. When this angle in…
The fabrication of superhydrophobic surfaces depends on surface microstructures and surface chemistry. In this Letter, an electrochemical method was developed to fabricate superhydrophobic surfaces, micro/nanometre-scale rough structures were created via electrochemical etching and the surface energy was reduced by th…
Understanding the dynamic behavior of nanostructural systems is important during the development of controllable and tailor-made nanomaterials. This is particularly true for nanostructures that are intended for biological applications because biomolecules are usually highly dynamic and responsive to external stimuli.…
The present work describes the synthesis and properties of nanomagnetic polymer composites (MPCs) comprising iron oxide nanoparticles as a filler and polyvinyl pyrrolidone (PVP) as polymer shell. The iron oxide nanoparticles were synthesized under alkaline medium using iron (II) salt. The nanocomposites were synthesiz…
Uniform helical silica nanotubes and hollow silica nanostructures with adjustable diameters have been prepared through the self-assembly of sodium dodecyl sulfate (SDS) as the surfactant, N -trimethoxysilylpropyl- N,N,N -trimethylammoniumchloride (TMAPS) as a costructure directing agent (CSDA), a binapthyl-based chira…
The microcosmic mechanisms of protein (recombinant human growth hormone, rhGH) incomplete release and stability from amphiphilic poly(monomethoxypolyethylene glycol-co-D,L-lactide) (mPEG-PLA, PELA) microspheres were investigated. PELA with different hydrophilicities (PELA-1, PELA-2, and PELA-3) based on various ratios…
Ammonium dihydrogen phosphate (ADP) (NH<SUB>4</SUB>H<SUB>2</SUB>PO<SUB>4</SUB>) single crystals were grown by gel method using sodium metasilicate (SMS). The X-ray diffraction analysis of the asâgrown ADP crystals showed that it possess tetragonal structure having lattice parameters a = 7.502 °A and c = 7.554 °A.…
Surface‐enhanced Raman scattering (SERS) has become increasingly popular in the scientific and industrial communities because of its analytical capabilities and potential to study fundamentals in plasmonics. Although under certain conditions extremely high sensitivity is possible, the practical use of SERS is frequent…
Several constitutive models for magnetic shape memory alloys (MSMAs) have been proposed in the literature. The implementation of numerical integration schemes, which allow the prediction of constitutive response for general loading cases and ultimately the incorporation of MSMA response into numerical solution algorit…
Abstract In this paper the low temperature deposition of nanocrystalline and ultrananocrystalline diamond (UNCD) films is compared and discussed. NCD films were prepared by hot filament chemical vapor deposition from a 1% CH 4 /H 2 mixture, while microwave plasma chemical vapour deposition was used to deposit UNCD fil…
Quantum dots (QDs) are very attractive probes for multi-color fluorescence imaging in biological applications because of their immense brightness and reported extended photostability. We report here however that single QDs, suitable for biological applications, that are subject to continuous blue excitation from a con…
A molecular level understanding of the structure, dynamics and mechanics of cellulose fibers can aid in understanding the recalcitrance of biomass to hydrolysis in cellulosic biofuel production. Here, a residue-scale REACH (Realistic Extension Algorithm via Covariance Hessian) coarse-grained force field was derived fr…
Cadmium selenide (CdSe) nanostructures were synthesised by the reaction of Cd(CH3COO)2·2H2O, SeCl4 and hydrazine hydrate (N2H4·H2O) in water and in the presence of NaOH, by a sonochemical method. In this work, thioglycolic acid, sodium dodecyl sulphate, cetyltrimethyl ammonium bromide and sodium dodecyl-benzene-sulpho…
Two-faced character in a film: Soft "Janus" two-dimensional colloidal crystal films were made using polystyrene (PS) particles, on an air-water interface as a mold for a flexible polypyrrole layer. By removing the PS particles, an array of femtoliter-sized cups was produced. These two-dimensional colloidal crystal fil…