Materials Literature
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In this study, novel water‐soluble corrole amino acid conjugates were synthesized and characterized. The coupling reaction of A 2 B‐ and A 3 ‐corroles with glycine ethyl ester and taurine under strong basic conditions proved to be successful and yielded di‐ and trifunctionalized corrole amino acid conjugates in good y…
Abstract We report on single walled carbon nanotubes (SWCNTs) used as a filler material for polycarbonate (PC) composites in this paper. Thin flexible composite films were prepared by solvent casting with a viscous dispersion of SWCNTs in a polymer matrix. The interaction of SWCNTs with PC was studied by Raman spectro…
In nanoscale structure sizes, the surface-to-bulk energy ratio is high and the surface effects must be taken into account. Surface effect plays a key role in accurately predicting the vibration behavior of nanostructures. In this paper, the wave behaviors of a single-walled carbon nanotube (CNT) conveying fluid are st…
Plasma electrolytic oxidation (PEO) is also known as micro-arc oxidation and spark anodizing is often regarded as a version of anodizing of valve metals (Mg, Al, Ti, and several others) and their alloys. Indeed, the essence of both anodizing and PEO is the production of oxide layers on a metal surface by the action of…
We present an experimental model system to study two-dimensional phase transitions. This system is composed of a monolayer of millimetric beads interacting through shor range magnetic dipole-dipole interactions. As the system is athermal, a mechanical agitation is used to produce an erratic motion of the beads. The tw…
Abstract Furthermore, deposition at such low temperatures is promising for processing of thin film assemblies. The preparation of bi‐layer electrolytes of yttria stabilized zirconia and gadolinia doped ceria thin films by aerosol assisted chemical vapor deposition is demonstrated. Gadolinia doped ceria films as thin a…
We report on a vertical geometry Mott-type visible (VIS)-blind Ultraviolet (UV) photodetector which was fabricated based on wurzite MgZnO (W-MgZnO) with a cubic MgZnO (C-MgZnO) anti-reflection layer. The C-MgZnO layer plays two roles in the detector, not only the conventional optical part but also electrical part. Pho…
Electrospun, emission color-tunable nanofibrous sheets were fabricated by multinozzle electrospinning equipped with a secondary electrode for the preparation of white-emissive sheets under a single excitation source, manipulating energy transfer between dyes. By control of the concentration of commercially available r…
The oxidation of bimetallic alloy nanoparticles comprising a noble and a nonnoble metal is expected to cause the formation of a single-component surface oxide of the nonnoble metal, surrounding a core enriched with the noble metal. Studying the room temperature oxidation of Au-In nanoparticles, we show that this simpl…
Actinometry is a non-invasive optical technique that can be used to quantitatively monitor atomic oxygen number densities [O] in gas discharges under certain operating conditions. However, careless application of the technique can lead to erroneous conclusions regarding the behaviour of atomic oxygen in plasma. One li…
Through isotopic self-diffusion measurements, the present work resolves a discrepancy in the literature about the primary oxygen-related point defect in rutile TiO2 by showing that suitably prepared surfaces can controllably inject large numbers of an exceptionally mobile defect. Results strongly suggest that this def…
By means of molecular dynamics simulations, we investigate the structural relaxation in disordered random copolymers and lamellar phases of gradient copolymers, containing chemical species of very different mobilities. Two models have been investigated: a generic bead–spring system and a MARTINI coarse-grained model o…
유재인 ・윤주식1 ・윤재곤1 ・김진희1 ・최순돈2,* ・장호경3 ・유재용4 ・배인호5,* (주)위스코하이텍 기업부설연구소 영남대학교 신소재공학부 대구한의대학교 의공학과 영남대학교 응용전자공학 영남대학교 물리학과 Characteristics of the Anodic Films on an AZ91D Mg Alloy Prepared by Plasma Electrolytic Oxidation and Burning Surface Treatment Jae-In Yu, Joo-Sik Yoon, Jae-Gon Yoon, Jin-Hi Kim, Soon-Don Choi*, Ho-Ky…
Second harmonic generation (SHG) and linear absorbance spectra of MnTiO${}_{3}$ were measured and the 1.88, 2.41, 2.63, and 3.06 eV SHG features were identified as $d\ensuremath{-}d$ optical transitions from ${}^{6}{A}_{1g}$ to ${}^{4}{T}_{1g}{(}^{4}G)$, ${}^{4}{T}_{2g}{(}^{4}G)$, ${{}^{4}{E}_{g}$,${}^{4}{A}_{1g}{(}^{…
Abstract Despite the “darker than black” association attributed to carbon nanotube forests, here is shown that it is also possible to grow these structures, over heat‐sensitive substrates, featuring highly transmissive characteristics from the UV to infrared wavelengths, for forest heights as high as 20 μm. The optica…
A quantum metamaterial can be implemented as a quantum coherent one-dimensional array of qubits placed in a transmission line. The properties of quantum metamaterials are determined by the local quantum state of the system. Here we show that a spatially periodic quantum state of such a system can be realized without d…
Bismuth oxysulfide Bi4O4S3, which has recently been claimed to be an exotic superconductor (\(T_{\text{c}} = 4.5\) K), was investigated by magnetic susceptibility and electrical resistivity measurements as well as by electron probe microanalysis. Single-phase Bi4O4S3 was successfully prepared by a high-pressure method…
BaTi2Sb2O is a T-c = 1.2 K superconductor with a d(1) square lattice, and isovalent Bi substitution for Sb can increase its T-c to 4.6 K (BaTi2Bi2O), accompanied by the complete suppression of charge density wave (CDW) or spin density wave (SDW) transition. In the present study, we demonstrate that aliovalent Sn subst…
We have demonstrated the synthesis of indium (In) nanoparticle (NP) arrays on TiO2 thin film (TF) using glancing angle deposition technique. The deposited In NPs are of the order of 4–10 nm in size. Optical absorption measurements depict 2.5 times enhanced absorption for In-NPs/TiO2-TF compared to TiO2 TF. The plasmon…
Motivating by recent experiments on surface enhanced Raman scattering (SERS) from colloidal solutions, we present here a simple model to elucidate the effects of extraneous surface charges on the enhanced Raman signal. The model is based on the well-established Gersten-Nitzan model coupled to the modified Mie scatteri…