Materials Literature
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The influence of an electrically controlled biaxial in-plane strain on the magnetization of superlattices of ferromagnetic La${}_{0.7}$Sr${}_{0.3}$MnO${}_{3}$ and SrTiO${}_{3}$ was studied for single-layer thicknesses of $d$ = 1.5--13 nm. Superlattices were grown by pulsed laser deposition on both SrTiO${}_{3}$(001) a…
Nearly monodisperse LaAlO(3) hollow spheres are synthesized by a novel precursor thermal decomposition method. Spherical colloids of capsulelike precursors with uniform diameters of 273 ± 35 nm have been synthesized by a solvothermal method. These spherical colloids could convert to LaAlO(3) hollow spheres with diamet…
Concerted and oxidative mechanisms for the initiation of the ROP of ε-caprolactone by divalent Sm(BH 4 ) 2 (THF) 2 have been computed at the DFT level and compared with experimental data. The concerted polymerization pathway is proposed to occur via divalent [Sm]–(BH 4 ) active species through classical O-acyl cleavag…
Abstract Multiwalled carbon nanotubes (MWCNTs) were synthesized using chemical vapor deposition and poly(trimethylene terephthalate) (PTT)/MWCNT composites with varying amounts of MWCNTs were prepared by melt compounding using DSM micro‐compounder. Morphological characterization by SEM and TEM showed uniform dispersio…
Novel field effect transistors with suspended graphene gates are demonstrated. By incorporating mechanical motion of the gate electrode, it is possible to improve the switching characteristics compared to a static gate, as shown by a combination of experimental measurements and numerical simulations. The mechanical mo…
Dielectric relaxation and complex heat capacity were carried out on high molecular weight poly(methyl acrylate) (PMA). The temperature was found to exert a stronger effect than density on the segmental dynamics, as reflected in the magnitudes of the scaling exponent, 2.55, and the ratio of isochoric and isobaric activ…
Bombyx mori silk fibroin is a protein-based macromolecular biopolymer with remarkable biocompatibility. Silk fiber was degummed and subjected to a series of treatments, including dissolution and dialysis, to yield an aqueous solution of silk fibroin, which was introduced rapidly into excess acetone to produce crystall…
A cantilevered carbon nanotube/amorphous Si coaxial nanostructure is studied with in situ transmission electron microscopy. The α-Si shell breaks at the anchoring point to the supporting Si substrate. The broken α-Si shell is pulled out while the CNT core remains intact, illustrating the striking interfacial mechanica…
A new method for studying the dynamics of a sessile drop by atomic force microscopy (AFM) is demonstrated. A hydrophobic microsphere (radius, r ∼ 20-30 μm) is brought into contact with a small sessile water drop resting on a polytetrafluoroethylene (PTFE) surface. When the microsphere touches the liquid surface, the m…
Abstract The Raman scattering process in graphene is always resonant, i.e. involves real electronic states, and this affects the Raman intensity. Thus, a detailed analysis of the Raman intensity of graphene can provide useful information on the Raman scattering process itself, in particular on the interaction between…
Abstract Shape memory polymers (SMPs) are a novel class of shape memory materials which can store a deformed (temporary) shape and recover an original (permanent) shape under a shape memory thermomechanical loading–unloading cycle. The deformation mechanisms of SMPs are very complicated, but the SMPs also have a lot o…
Abstract MoS 2 nanoparticles were formed on the graphitic surface by annealing of a mixture of amorphous MoS 3 and reduced graphite oxide at 1000 °C in high‐vacuum conditions. High‐resolution transmission electron microscopy (HRTEM) revealed that the nanoparticles are ranged from 5 to 12 nm. The large variation in nan…
Carbon nanotubes are of great interest as a filler for polymer composites due to their unique properties such as high electrical and thermal conductivity, ultrahigh mechanical strength, high ratio length/diameter (1000) at nanosized value of diameter. Several recent reviews summarizing different aspects of the compos…
The ternary compounds GeSb 2 Te 4 and Ge 2 Sb 2 Te 4 are promising phase change materials for application in the fields of data storage and recording. In the present study, thin films of the materials were deposited on inert substrates using the magnetron sputter technique. The microstructures of the amorphous, metast…
An amorphous co-polymer formed from norbornene and a photochromic ruthenium sulfoxide complex shows reversible macroscopic deformations when irradiated. Charge-transfer excitation of the sulfur-bonded isomer leads to isomerization and a macroscopic bending of the film. Charge-transfer excitation of the oxygen-bonded i…
(K x Na 1− x )NbO 3 ceramics modified with Li + and Ta 5+ have been produced using the mixed-oxide synthesis method. Synchrotron X-ray diffraction measurements were made on the samples from 12 K to temperatures above their ferroelectric–paraelectric transition points with 10 K measurement steps. Rietveld refinement wa…
A highly performing natural rubber/silica (NR/SiO 2 ) nanocomposite with a SiO 2 loading of 2 wt% was prepared by combining similar dissolve mutually theory with latex compounding techniques. Before polymerization, double bonds were introduced onto the surface of the SiO 2 particles with the silane‐coupling agent. The…
A study of the effect of Cr 3+ doping in zinc tris(thiourea)sulfate (ZTS, a well known nonlinear optical material) single crystals on crystalline perfection and optical properties was carried out. Pure and chromium-doped (1 and 2 mol%) ZTS single crystals were grown by the slow evaporation solution technique. The actu…
Two new acentric borogermanates, Ca 10 Ge 16 B 6 O 51 ( Pba 2) and Cd 12 Ge 17 B 8 O 58 ( P 4̅), have been successfully synthesized by high-temperature solid-state reactions of CaCO 3 (or CdCO 3 ), GeO 2, and H 3 BO 3 . Both structures display the same one-dimensional (1D) [Ge 4 O 12 ] n chains composed of GeO 4 tetra…
The width, w, and height, h, of dendronized polymers (DPs) adsorbed onto mica and highly oriented pyrolitic graphite (HOPG) were characterized by atomic force microscopy (AFM) and electron microscopy (EM). The study utilized a homologous series of generations g = 1–5, hence enabling coadsorption and characterization u…