Materials Literature
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With the goal of achieving an understanding of the properties of bimetallic alloy clusters having atoms of two isoelectronic elements, we have studied the structural, electronic and magnetic properties of MnmTcn, MnmRen and TimZrn clusters with m + n = 13 (n = 0, 1, 4, 6, 9, 12, 13), using first-principles density fun…
ABSTRACT As a kind of reinforcing agent, the application of nanocrystalline cellulose (NCC) is widely limited in hydrophobic polymers owing to its rich hydroxyl surface. In this study, NCC was modified with lauric acid/ p ‐toluensulfonyl chloride mixture, then the modified nanocrystalline cellulose (mNCC) was incorpor…
A work function study based on the onset shift (i.e., following low energy cut-off) of secondary electron spectra has been used for the last four decades to monitor the deposition and adsorption in real time, measure the dipole momentum and polarizability of the surface layer, and determine the lateral distribution of…
ABSTRACT Two industrial wastes, fly ash (FA) and recycled polypropylene (RPP) were used to prepare a value‐added, sustainable, low cost composite material. Improving the interfacial interaction between the hydrophobic RPP matrix and the hydrophilic FA particles is important to get a good combination of properties. In…
Measurements of electrical resistivity ρ, magnetization M and specific heat C have revealed that SrPt2Sb2 is a type-II superconducting material with a superconducting critical temperature (Tc) of 2.1 K. The electronic specific heat coefficient γ and the ratio ΔC(Tc)/γTc are 9.2(1) mJ mol−1 K−2 and 1.29, respectively.…
Electric fields have been shown to stabilize the disordered phase of near-critical block copolymer solutions. Here, we use in situ synchrotron small-angle X-ray scattering to examine how the initial orientation of lamellar domains with respect to the external field (φ) affects the shift in the order–disorder transitio…
We study the initial nucleation dynamics of poly(3-hexylthiophene) (P3HT) in solution, focusing on the relationship between the ordering process of main chains and that of side chains. We carried out Langevin dynamics simulation and found that the initial nucleation processes consist of three steps: the ordering of ri…
The introduction of silver into the Eu3+-doped sodium–aluminosilicate glasses prepared by Ag+-Na+ ion exchange leads to the formation of different ionic silver species. Under 350nm excitation, effective enhancement of Eu3+ luminescence is ascribed to energy transfer (ET) from silver aggregates to Eu3+ and White light…
This article attempts to present straightforward and easy-to-understand guidelines for the determination of element distribution in compounds lacking X-ray scattering contrast because they have similar electron counts. Different sources of anomalous dispersion correction terms (especially Δ f ′ values) are compared wi…
Diatoms are monocellular algae responsible of 20-25% of the global oxygen produced by photosynthetic processes. The protoplasm of every single cell is enclosed in an external wall made of porous hydrogenated silica, the frustule. In recent times, many effects related to photonic properties of diatom frustules have bee…
Abstract A waterborne‐polyurethane‐based fluorescent dye 4‐amino‐ N ‐cyclohexyl‐1,8‐naphthalimide ( WPU‐ACN ) was synthesized by attaching 4‐amino‐ N ‐cyclohexyl‐1,8‐naphthalimide ( ACN ) into polyurethane chains according to a prepolymer−ionomer process. The structure of WPU‐ACN was confirmed by means of Fourier tran…
The big bang–big crunch method is a global optimization approach developed upon the analogy of one of the cosmological theories of the evolution of the universe. It has been suitably combined with a simulated annealing algorithm and used for solving crystal structure from powder diffraction data in direct space. When…
Ru particle sizes in supported ruthenium catalysts have been studied by small-angle X-ray scattering (SAXS). It has been proposed to use new masking liquids with a relatively low X-ray radiation absorption. Using these liquids it was possible to achieve practically quantitative agreement between SAXS and transmission…
Flexibility in zeolite RHO manifests itself in its ability to adopt one of two structures, depending on composition and applied external conditions. In this work, structural changes of dehydrated zeolite RHO of composition |Na 6 Cs 3 |[Al 9 Si 39 O 96 ] and pure silica were investigated by molecular dynamics (MD) and…
We have performed an experimental study of the crystal structure, lattice dynamics, and optical properties of silver chromate (Ag 2 CrO 4 ) at ambient temperature and high pressures. In particular, the crystal structure, Raman-active phonons, and electronic band gap have been accurately determined. When the initial or…
Molybdate uptake was studied using ZnAl layered double hydroxides (LDHs) having different interlayer anions namely chloride, carbonate, or nitrate with various Zn/Al atomic ratios. A maximum molybdate uptake of 114 mg Mo/g was observed for ZnAl3-Cl-LDH. The uptake is due to ion-exchange for chloride and nitrate contai…
We propose a minimal model describing magnetic behavior of Fe-based superconductors. The key ingredient of the model is a dynamical mixing of quasidegenerate spin states of Fe(2+) ion by intersite electron hoppings, resulting in an effective local spin S(eff). The moments S(eff) tend to form singlet pairs and may cond…
INTRODUCTION: Shape-memory polymers (SMPs) have gained interest for temporary drug-release systems that should be anchored in the body by self-sufficient active movements of the polymeric matrix. AREAS COVERED: Based on the so far published scientific literature, this review highlights three aspects that require parti…
We have prepared NiFe2O4, CoFe2O4, Ni0.6Zn0.4Fe2O4 and ZnFe2O4 spinel type ferrite nanoparticles by surfactant-assisted hydrothermal process using cetyltrimethylammonium bromide (CTAB). The spin-flop transition, magnetic, dielectric and permittivity characterizations have been investigated. The spin-flop transition oc…
We studied the binary carbide systems Li2C2 and CaC2 at high pressure using an evolutionary and ab initio random structure search methodology for crystal structure prediction. At ambient pressure Li2C2 and CaC2 represent salt-like acetylides consisting of C2(2-) dumbbell anions. The systems develop into semimetals (P3…