Materials Literature
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This review discusses advances that have been made in the study of defect-induced double-resonance processes in nanographite, graphene and carbon nanotubes, mostly coming from combining Raman spectroscopic experiments with microscopy studies and from the development of new theoretical models. The disorder-induced peak…
NBR과 강판의 접착특성을 향상시키기 위해 대기압 화염 플라즈마(APFP) 처리 장치가 사용되었다. 가장 우수한 접착특성을 나타내는 최적 조건을 찾기 위해 다양한 처리 조건(처리속도, 거리)에 따른 효과에 대한 실험적 연구를 하였다. 주어진 조건에서 버너 포트와 강판의 최적 거리는 40mm, 버너 포트의 최적 처리속도는 50m/min였다. APFP 처리 후 접착제를 두 번 도포한 강판의 접착강도는 접착제만 도포한 경우보다 20.5% 증가하였다. 본 연구를 통해서 대기압 화염 플라즈마 처리에 의한 강판의 표면개질이 고무와 강의 접착강도를 증가시키는 적절하면서도 응용이…
In the title complex, cis-[PtCl(2)(C(11)H(9)N)(2)], the Pt(II) ion is situated in a slightly distorted square-planar environment coordinated by two N atoms from two 2-phenyl-pyridine ligands and two Cl atoms. The two pyridyl planes are inclined with dihedral angles of 59.1 (2) and 61.84 (19)° with respect to the PtCl(…
Part 2 of the paper presents the neural network as a meta‐model for one‐dimensional fibrous materials which was elaborated on the basis of a discrete‐event simulation model that was presented in Part 1 of the paper. The architecture of the full‐size and part‐size network was developed and tested. The training set for…
Single crystals of α-Ba(2)P(2)O(7), dibarium diphosphate, were obtained by solid-state reaction. The ortho-rhom-bic structure is isotypic with α-Sr(2)P(2)O(7) and is the second polymorph obtained for this composition. The structure is built from two different BaO(9) polyhedra (both with m symmetry), with Ba-O distance…
Natural rubber/organoclay nanocomposites of varying filler loading [2 to 10 per hundred rubber (phr)] using derivative of tea (Camellia sinensis) seed oil were prepared by melt intercalation. Effects of filler dosage on the physicomechanical properties of the natural rubber (NR) vulcanizates were examined. Results of…
Human immunodeficiency virus (HIV) affects more than 40 million people worldwide and more than 5 million in South Africa alone. There is no cure for the disease yet, and novel effective drugs need to be discovered to make any progress in combating the disease. Twelve extracts from indigenous South African plants were…
황해 대륙붕에 분포하는 점토(2 ㎛ 이하 입자) 퇴적물의 기원지와 퇴적과정을 이해하기 위해 황해로 유입되는 주요 강(한국의 한강, 금강, 만경-동진강, 영산강, 그리고 중국의 황하와 양쯔강)의 하구 표층 퇴적물과 대륙붕 니질대 코어 퇴적물에 대한 점토광물 함량 특성을 분석하였다. 모든 시료들에서 일라이트 함량(47~64%)이 가장 높고, 다음으로 녹니석(21~35%), 고령석(8~16%), 스멕타이트(1~19%) 순으로 낮다. 한국의 강 하구 퇴적물은 높은 녹니석+고령석(kaolinite+chlorite) 함량, 양쯔강의 하구 퇴적물은 높은 일라이트(illite,…
The acoustic sound velocity of water in the supercooled regime shows peculiar behaviour. According to the available data, the sound velocity displays complex behaviour below −15°C, where anomalous frequency dispersion phenomena seem to appear and need to be understood. In particular, lower-frequency data at a few tens…
The scaling of slow structural relaxation with fast caged dynamics is seen in the molten salt Ca0.4K0.6(NO3)1.4 (CKN) over about 13 decades of the structural relaxation time. Glycerol scaling has been analysed in detail. In glycerol, the short-time mean-square displacement , a measure of the caged dynamics, is contrib…
In this work, single jersey fabrics were produced with different yarn numbers and loop lengths by means of conventional ring‐spun and compact ring yarns. Knitted fabrics were subjected to two different relaxation treatments, dry and washing. After relaxation, air permeability of cotton‐knitted fabrics with different y…
We demonstrate a wideband-tunable Q-switched fiber laser exploiting a graphene saturable absorber. We get ~2us pulses, tunable between 1522 and 1555nm with up to~40nJ energy. This is a simple and low-cost light source for metrology, environmental sensing and biomedical diagnostics.
We present investigations on single Ni/Si related color centers produced via ion implantation into single crystalline type IIa CVD diamond. Testing different ion dose combinations we show that there is an upper limit for both the Ni and the Si dose 10^12/cm^2 and 10^10/cm^2 resp.) due to creation of excess fluorescent…
We propose to realize the itinerant ferromagnetism of two-component cold fermionic atoms in the $p$-orbital bands in optical lattices. The band flatness in the two-dimensional honeycomb lattice dramatically amplifies the interaction effect driving the ferromagnetic transition even with a relatively weak repulsive inte…
Agrin mediates accumulation of acetylcholine receptors (AChRs) at the developing neuromuscular junction, but has also been implicated as a regulator of central nervous system (CNS) synapses. A C-terminal region of agrin (Ag-C20) binds to the α3 subunit of the sodium-potassium ATPase (NKA) in CNS neurons suggesting tha…
We study the dependence on the strength and orientation of applied uniaxial strain of the Drude weight in the conductivity of graphene. We find a non-monotonic dependence on strain, which may be related to the proximity to several strain-induced electronic topological transitions. Given the relation between the Drude…
In this paper, the cyclic stress amplitude controlled high-cycle fatigue properties and final fracture behavior of commercially pure titanium (Grade 2) are presented and discussed. The material characterization was developed and put forth for selection and use in a spectrum of applications spanning the industries of a…
Nanoporous Pt/TiO2 micro-particles were synthesized via an aerosol assisted co-assembly (AACA) route. Aerosol droplets were produced from a colloidal mixture of 5 nm Pt and 20 nm TiO2 nanoparticles, which formed spherical micro-aggregates of Pt and TiO2 with average diameter of around 1.2 μm. The resulting composite m…
Abstract Pd-catalyzed polycondensations of aniline derivatives and 4,4′-dibromoazobenzene afford polyaniline analogs containing an azobenzene unit in good yields. The obtained polymers are red in solution and in thin-film states, whereas they exhibit green metal-like luster in thick-film states.
Abstract Ab initio calculations were used to analyze the interactions between a molecule of B2H6 with HF and LiH at the MP2/aug-cc-pvdz computational level. B2H6 could interact with HF and LiH through both its terminal (Ht) and bridged (Hb) hydrogens. Interaction of Hb of B2H6 with HF and LiH result in formation of Hb…