Materials Literature
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We describe the topological surface states of Bi${}_{4}$Se${}_{3}$, a compound in the infinitely adaptive Bi${}_{2}$-Bi${}_{2}$Se${}_{3}$ natural superlattice phase series, determined by a combination of experimental and theoretical methods. Two observable cleavage surfaces, terminating at Bi or Se, are characterized…
In several parent iron-pnictide compounds the resistivity has an extended range of linear magnetic field dependence. We argue that there is a simple and natural explanation of this behavior. Spin density wave transition leads to Fermi-surface reconstruction corresponding to strong modification of the electronic spectr…
New structure data for the high-temperature diluted magnetic semiconductor Si:Mn, synthesized by laser method are presented. The higher resolution transmission electron microscopy and diffraction was applied in two crystal directions of epitaxial layers of DMS Si:Mn with elimination of the contribution from GaAs subst…
We investigate the magnetic structure of Mn${}_{3\ensuremath{-}x}$Fe${}_{x}$Sn${}_{2}$ using neutron powder diffraction experiments and electronic structure calculations. These alloys crystallize in the orthorhombic Ni${}_{3}$Sn${}_{2}$ type of structure ($Pnma$) and comprise two inequivalent sites for the transition…
Crystal and domain structures, and ferroelectric properties of tensile-strained BiFeO${}_{3}$ epitaxial films grown on orthorhombic (110)${}_{o}$ PrScO${}_{3}$ substrates were investigated. All films possess a ${M}_{B}$-type monoclinic structure with 109\ifmmode^\circ\else\textdegree\fi{} stripe domains oriented along…
It has recently been shown that submonolayer Pd on W(110) forms highly-ordered linear mesoscopic stripes at high temperatures. The stripes display an internal Pd superstructure with a nano-scale periodicity along the direction perpendicular to the periodicity of the stripes. The same type of superstructure is also obs…
A technology for recording electrical activity of large neuron populations at arbitrary depth in brain tissues with less than cell spatial and millisecond temporal resolutions was the most craving dream of neuroscientists and a long pursued goal of engineers for decades. Even though many imaging techniques have been d…
Assuming that core loss data of Soft Magnetic Materials obey scaling relations, models describing the power losses in materials exposed to non-sinusoidal flux waveforms and DC Bias conditions have been derived. In order to test these models, the measurement data for two materials have been collected and the core losse…
The rapid developments of the deep-ultraviolet (deep-UV) laser science and technology urgently demand the nonlinear optical crystals which have large band gap enough to transmit the deep-UV light. Herein, we synthesized a series of new rare earth beryllium borates: ReBe2B5O11 (Re = Y, Gd). The structures of all these…
Drug delivery systems are designed to achieve drug therapeutic index and enhance the efficacy of controlled drug release targeting with specificity and selectivity by successful delivery of therapeutic agents at the desired sites without affecting the non-diseased neighbouring cells or tissues. In this research, we de…
There has been an increasing interest to develop new types of stimuli-responsive drug delivery vehicles with high drug loading and controlled release properties for chemotherapeutics. An acid-labile poly(ethylene oxide)-block-polyphosphoester-graft-PTX drug conjugate (PEO-b-PPE-g-PTX G2) degradable, polymeric paclitax…
A series of Eu(2+) and Eu(2+)/Tb(3+) activated novel Ba3LaNa(PO4)3F phosphors have been synthesized by traditional solid state reaction. Rietveld structure refinement of the obtained phosphor indicates that the Ba3LaNa(PO4)3F host contains three kinds of Ba sites. The photoluminescence properties exhibit that the obta…
We propose an effective lattice Hamiltonian for monolayer MoS${}_{2}$ in order to describe the low-energy band structure and investigate the effect of perpendicular electric and magnetic fields on its electronic structure. We derive a tight-binding model based on the hybridization of the $d$ orbitals of molybdenum and…
Collection of selected, peer reviewed papers from the 2013 International Conference on Bio-Medical Materials and Engineering (ICBME 2013), March 26-27, 2013, Hong Kong. The 121 papers are grouped as follows: Chapter 1: Advanced Materials and Environmental Engineering; Chapter 2: Biological and Medical Materials, Techn…
A new magnesium oxysulfate hydrate phase, 5 Mg ( OH ) 2 · MgSO 4 ·7 H 2 O was synthesized and structurally characterized. The new phase crystallizes in the form of microsized needles and its crystal structure was solved using X ‐ray powder diffraction. The crystal packing is made of infinite triple MgO 6 chains, inter…
Block copolymers have garnered significant attention in the past few decades due to their ability to self-assemble into nanoscale structures (∼10–100 nm), making them ideal for emerging nanotechnologies, such as nanolithography, nanotemplating, nanoporous membranes, and ultrahigh-density storage media. Many of these a…
Nanotechnology is a multidisciplinary science that includes scientific and technological activities at molecular and atomic scales (1–100 nm). Scientific principles and new properties can be understood and controlled when working at this scale. Nanotechnology is advancing rapidly due to the great progress achieved in…
This paper presents the first successful application of vinyl polymer/graphene-based nanocomposites in corrosion protection. Well-dispersed polystyrene (PS)/modified-GO nanocomposites were successfully prepared using in situ miniemulsion polymerisation. The as-prepared nanocomposites exhibit superior anti-corrosion pr…
Asymmetric supercapacitors with high energy density are fabricated using a self‐assembled reduced graphene oxide (RGO)/MnO2 (GrMnO2) composite as a positive electrode and a RGO/MoO3 (GrMoO3) composite as a negative electrode in safe aqueous Na2SO4 electrolyte. The operation voltage is maximized by choosing two metal o…
以 N，N-二甲基甲酰胺（DMF）为溶剂，优化了4，5-二（1H-四唑-5-基）-1H-咪唑（H3BTI）的合成工艺：4，5-二氰基咪唑、叠氮化钠和氯化铵的摩尔比为12．22．2，反应温度90℃，反应时间8 h，收率为94．6％。通过红外光谱、1H NMR、13C NMR和元素分析对 H3 BTI的结构进行了表征，采用 DSC和 TG/DTG 技术研究了 H3 BTI的热分解性能，用非等温 DSC 技术研究了热分解反应动力学。研究结果表明，H3BTI的活化能为197．62 kJ·mol -1，指前因子为16．16；H3BTI的临界爆炸温度为556．38 K，大于 RDX的487．90 K，表明其热稳定性优于 RDX；热分解反应…