Materials Literature
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Research on graphene and other two-dimensional atomic crystals is intense and likely to remain one of the hottest topics in condensed matter physics and materials science for many years. Looking beyond this field, isolated atomic planes can also be reassembled into designer heterostructures made layer by layer in a pr…
A simple model to describe Mixed Ionic Electronic Conductors (MIEC) in terms of standard semiconductor physics is described. This model allows to understand defect equilibrium and charge transport at ideal heterojunctions between materials simultaneously conducting electronic and ionic point defects and to explore how…
We propose a mechanism to explain the phenomenon of positive exchange bias on magnetic bilayered systems. The mechanism is based on the formation of a domain wall at a disordered interface during field cooling (FC) which induces a symmetry breaking of the antiferromagnet, without relying on any ad hoc assumption about…
Self-assembled monolayers of 1,3,5-tris(4'-biphenyl-4"-carbonitrile)benzene, a large functional trinitrile molecule, on the (111) surfaces of copper and silver under ultrahigh vacuum conditions were studied by scanning tunneling microscopy and low-energy electron diffraction. A densely packed hydrogen-bonded polymorph…
We indicate the fundamental rationale underlying the control of temperature and the manipulation of thermal flux, with reference to a multilayered composite material. We show that when the orientation of the layers in the composite is physically rotated with respect to a constant temperature gradient, there would then…
We report a systematic investigation of the temperature dependence of electrical resistance behaviours in tri- and four-layer graphene interconnects. Nonlinear current-voltage characteristics were observed at different temperatures, which are attributed to the heating effect. With the resistance curve derivative analy…
Magnetic cooling prototypes based on the magnetocaloric effect require the magnetic refrigerant to be shaped into geometries that enable quick and efficient heat-transfer to the transfer fluid. Simple solutions include a stack of parallel-plates or a bed of packed-spheres. Here, we demonstrate how more sophisticated g…
Using fluorescence-based measurements, the effect of confinement on the glass transition temperature ( T g ) was investigated in seven polymer systems of single-layer films supported on silicon substrates, all chosen such that they do not have substantial substrate interactions. Poly(vinyl chloride) exhibited the stee…
BACKGROUND: The interior quality, shell impact strength and functional characteristics of eggs coated with chitosan and lysozyme-chitosan combinations were evaluated for enhancing egg freshness during storage. A 10% (w/w) lysozyme solution was incorporated into 1% (w/w) chitosan film-forming solution at ratios of 0, 1…
Single‐phase multiferroic materials are of considerable interest for future memory and sensing applications. Thin films of Aurivillius phase Bi 7 Ti 3 Fe 3 O 21 and Bi 6 Ti 2.8 Fe 1.52 Mn 0.68 O 18 (possessing six and five perovskite units per half‐cell, respectively) have been prepared by chemical solution deposition…
A solid-state flexible supercapacitor (SC) based on organic-inorganic composite structure was fabricated through an "in situ growth for conductive wrapping" and an electrode material of polypyrrole (PPy)-MnO2 nanoflakes-carbon fiber (CF) hybrid structure was obtained. The conductive organic material of PPy greatly imp…
The present Perspective critically re-examines the photophysics of para -distyrylbenzene (DSB) as a prototype of herringbone-arranged H-aggregates to resolve the apparent contradiction of the frequently reported “aggregation-induced emission quenching” in H-aggregates on one side and highly emissive DSB crystals on th…
La(Fe, Si)13-based compounds are well-known magnetocaloric materials, which show a pronounced negative thermal expansion (NTE) around the Curie temperature but have not been considered as NTE materials for industrial applications. The NaZn13-type LaFe13-xSix and LaFe11.5-xCoxSi1.5 compounds were synthesized, and their…
By means of first-principles computation, metal (Cu, Ag, Au, Pt, Rh, Pd, Fe, Co, and Ir) doped hexagonal boron nitride nanosheets (h-BNNSs) have been systematically investigated. The strong interaction between the metal atoms and defect sites in h-BNNS, such as the boron vacancy and nitrogen edge, suggests that metal…
We present a microscopic theory of neutral excitons and charged excitons (trions) in monolayers of transition metal dichalcogenides, including molybdenum disulfide. Our theory is based on an effective mass model of excitons and trions, parameterized by ab initio calculations and incorporating a proper treatment of scr…
The temperature dependence of the magnetic polarization near the Curie temperature TCin Ni2MnGa stoichiometric alloys, directly processed from the melt in a twin-roller melt-spinning device, is investigated. The effect of the solidification rate on the Hopkinson peak detected is evaluated in samples quenched at three…
Zn1−xCo x S (0.00001 ≤ x ≤ 0.1) nanocrystals have been synthesized using facile bottom-up synthesis technique chemical co-precipitation method. Crystallographic and morphological characterizations of synthesized nanomaterials have been done using X-ray diffraction (XRD) and transmission electron microscope (TEM), resp…
In this contribution, the influence of Si content on the formation of the of LaFe(13-x)Si(x)(1:13 phase) synthesized by the reduction-diffusion (R/D) process is addressed. The raw materials used were Fe and Si, in powder form, La oxide (La2O3), and Ca granules as reduction agent. The amount of Si per unit formula, rep…
We propose and extensively analyze a novel graphene-FET (GFET) with two capacitively coupled field-controlling electrodes (FCE) at the access region. The dc and RF characteristics of the proposed device are studied using analytical and numerical techniques and compared with the baseline designs. The independently bias…
We report detailed investigation on synthesis and characterizations of water dispersible upconverting Y8V2O17:Er:Yb spherical nanophosphor. Nanophosphors were synthesized using the co-precipitation approach and were well stabilized in water after surface modification with glycerol. UV excitation yielded green dominant…