Materials Literature
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Observing the individual building blocks of matter is one of the primary goals of microscopy. The invention of the scanning tunneling microscope [1] revolutionized experimental surface science in that atomic-scale features on a solid-state surface could finally be readily imaged. However, scanning tunneling microscopy…
We examine the photoconductivity of an intrinsic graphene associated with far- and mid-infrared irradiation at low temperatures. The model under consideration accounts for the excitation of the electron-hole pairs by incident radiation, the interband generation-recombination transitions due to thermal radiation, and t…
Galvanic replacement of Ag nanocubes with AuCl2− and AuCl4− results in morphological, compositional, and spectral differences that provide insight into the reaction mechanism by which hollow/porous gold nanostructures can be prepared for biomedical applications.
We report the first observation of photon antibunching in the photoluminescence from single carbon nanotubes. The emergence of a fast luminescence decay component under strong optical excitation indicates that Auger processes are partially responsible for inhibiting two-photon generation. Additionally, the presence of…
Ceramic composites (2Ni 0.41 Zn 0.41 Cu 0.18 Fe 2 O 4 –BaTiO 3 ) were successfully prepared by a direct solid-state reaction of raw materials (BaCO 3 , CuO, α-Fe 2 O 3 , NiO, TiO 2 , and ZnO). X-ray diffraction (XRD) and electron probe micro analysis (EPMA) measurements were performed for these samples and it is confi…
Abstract We investigated the properties of ZnO layers grown by metalorganic chemical vapor deposition on GaN(0001) templates and ZnO(0001) bulk substrates. Steps and hexagonal pits were observed on the surfaces of the ZnO/GaN films as revealed by atomic force microscopy. The root‐mean‐square roughness was 2.6 nm over…
The properties of nanosize heterojunctions are of increasing interest as the trend of scaling down the size of electronic devices continues. We present here the direct growth of carbon nanotubes on a silicon substrate to form a heterodimensional heterojunction. Current-voltage measurements reveal the characteristics o…
The gas atmosphere in continuous annealing and galvanizing lines alters both composition and microstructure of the surface and sub-surface of sheet steels. The alloying element enrichments and the oxide morphology on transformation-induced plasticity steel surfaces are strongly influenced by the dew point of the furna…
We performed structural analysis of PbHfO 3 between 10 and 500 K in the room-temperature antiferroelectric phase and the cubic phase using powder neutron diffraction. Disordered arrangements of Pb atoms were not detected in the cubic phase in contrast to the results of X-ray diffraction. This indicates that Pb atoms h…
Multiple-labelling immuno-EM is a powerful tool for localizing and co-localizing different antigens simultaneously in cells and tissues at high spatial resolution. Commonly used labels for this purpose are differently sized gold spheres. A comparison of results obtained with differently sized markers is often difficul…
Nanocomposite films of chitosan/methoxy poly(ethylene glycol)-b-poly(ε-caprolactone) diblock copolymer were prepared by film casting of a diblock copolymer nanoparticle suspension-chitosan solution. The results obtained from thermogravimetric analysis confirmed that intermolecular bonds existed between the chitosan an…
The κ-type organic superconductors have unique physical properties, many of which are yet to be understood. Most of their physical properties are closely related to carrier dynamics, which can be directly observed by ultrafast optical measurements in their nonequilibrium states. Time-resolved temperature-dependent ref…
The dielectric material with an isolated hydrogen-bond, 5-bromo-9-hydroxyphenalenon, was studied by means of neutron and X-ray diffractions in the temperature range between 300 and 10 K. Analyses on nuclear and electron density distributions revealed a discrepancy between the two distributions of the hydrogen atom in…
Abstract. The presented "open" composite left-handed/right-handed (CRHLH) substrate integrated waveguide performs well as a low-profile leaky wave antenna. This design is distinguished due to the fact that it is derived from the approved equivalent circuit model of the H10 rectangular hollow waveguide mode. The wave p…
Reliable EBSD mapping of 90 degree domains in a tetragonal ferroelectric perovskite has been achieved for the first time, together with reliable automated orientation determination from TEM-Kikuchi patterns. This has been used to determine misorientation angles at 90 degree domain boundaries and thus local c/a ratios.…
Over the last two decades, several methods, of increasing sophistication, have evolved to measure boundary plane orientation by electron backscatter diffraction. Originally, metallographic sectioning was used to obtain the location of the boundary plane. The most recently designed approach allows the relative frequenc…
[001]-poled relaxor based ferroelectric Pb(Zn1∕3Nb2∕3)O3–(6–7)%PbTiO3 single crystals of [110]-length cut exhibit k31≈0.85 and very high d31∕s11E value. They are promising materials for sensors and actuators comprising an elastic substrate such as a metal shim or support, especially under dynamic loading conditions. I…
Abstract The reaction of iron(II) acetate with the tetradentate Schiff base like ligands H 2 L1 ((E,E)‐[{diethyl 2,2′‐[1,2‐phenylenebis‐(iminomethylidyne)]bis[3‐oxobutanato]}]) and H 2 L2 ([([3,3′]‐[1,2‐phenylenebis(iminomethylidyne)]bis(2,4‐pentane‐dionato)(2‐)‐N,N′,O2,O2′]) in the presence of 1‐meim (1‐methylimidazo…
We report on the contribution of optical phonon decay into acoustic phonon to the thermal conductivity [k(T)] of semiconductors. We have considered this mechanism as an acoustic phonon generation rate within the full modified Callaway theory to accurately describe experimental data of k(T) for Ge as a function of isot…
A focused ion beam (FIB) is used to sequentially reduce the contact length of an evaporated metal film to a multiwalled carbon nanotube (MWCNT). By using this FIB contact cutback technique, the contact resistance between an individual MWCNT and evaporated thin films of Au, Au∕Ti, and Ag are accurately determined. The…