Materials Literature
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Rudimental research progress of oxyapatite-type rare-earth silicates is reviewed based on the published papers mainly from 1959 to 1993 that have not yet been discussed in detail. The knowledge of oxyapatite-type rare-earth silicates significantly increased during this period. Chemical compounds of rare-earth oxides a…
This study aimed to synthetize, characterize and evaluate the antimicrobial properties of silver nanoparticles to be used in the development of a root intracanal formulation. Silver nanoparticles (AgNPs) were obtained by reduction of silver nitrate with sodium borohydride and characterized by UV-Visible spectrophotome…
SWNTs grown by base growth mode and tip growth mode show a striking contrast in chirality distributions.
The high-temperature failure mechanism of K-based additives in a Mg(NH 2 ) 2 –2LiH system was clarified for the first time.
The thermal expansion behaviour of two polymorphs of 4,4′-methylenebis(2,6-dimethylaniline) (MBDA) has been studied. The monoclinic form exhibits a very large uniaxial negative thermal expansion (αl = −174(8) MK−1) and 1.6 times higher αv than the triclinic form, which exhibits a normal positive thermal expansion. Thi…
The stabilisation energies of the crystal structures of 1,3-dithiole-2-thione-4-carboxyclic acid···I2 and DABCO···I2 complexes determined by the CCSD(T)/CBS method are very large and exceed 8 and 15 kcal mol(-1), respectively. The DFT-D method (B97-D3/def2-QZVP) strongly overestimates these stabilisation energies, whi…
In this paper, we present a highly accurate closed-form compact model for Schottky-Barrier-type Graphene Nano-Ribbon Field-Effect Transistors (SB-GNRFETs). This is a physics-based analytical model for the current-voltage (I-V) characteristics of SB-GNRFETs. We carry out accurate approximations of Schottky barrier tunn…
N-bridged dimers of tetrapyrroles complexed by transition metals have been known for nearly four decades, and gained renewed attention when their powerful oxidation properties were recently evidenced. This article is a state of the art review of the reported complexes and of their synthetic methods. Beyond classical c…
Nanoparticles of biocompatible and biodegradable polymers such as poly(lactic-co-glycolic acid) (PLGA) are widely used as drug delivery systems for the administration of biomolecules like proteins. The purpose of this work is to validate a novel formulation method by a phase separation phenomenon using the non-toxic s…
The refinement of the structures of 17 weddellite crystals [Ca(C 2 O 4 )·(2+ x )H 2 O, I 4/ m , a = 12.329-12.378 Å, c = 7.345-7.366 Å, V = 1117.8-1128.6 Å 3 ], which were taken from the oxalic renal stones of the St. Petersburg (Russian Federation) citizens of both sexes aged from 24 to 65 years, has been carried out…
The medical and dental field has seen several technological revolutions that have changed clinical practice. One concept which has and holds further promise in bringing about a paradigm shift in the field of diagnostics and management is nanotechnology. Nanotechnology has several applications in dentistry, from diagno…
We investigate the electron transport in silicene with both staggered electric potential and magnetization; the latter comes from the magnetic proximity effect by depositing silicene on a magnetic insulator. It is shown that the silicene could be a spin and valley half metal under appropriate parameters when the spin—…
Graphene-based hydrogels/aerogels (GHA) have attracted widespread attention due to its excellent mechanical strength, electrical conductivity, thermal stability and adsorption capa- bility. In this article, some research achievements are reviewed on preparation strategies, forma- tion mechanisms and potential applicat…
Novel and highly tuneable pulsatile drug delivery systems have been prepared through the electrospinning of a blend of poly(ethylene oxide) (PEO), sodium alginate (SA), and sodium ibuprofen (SI). The resultant fibres contain crystallites of SI embedded in a PEO-SA matrix, and rather than being obtained as flat mats on…
We synthesized a Si-based clathrate, composed entirely of Earth abundant elements, and using ab initio calculations and spectroscopic and Hall mobility measurement showed that it is a promising material for solar energy conversion.
In this study, we have represented synthesis of nano spherical nickel using porous Hibiscus rosa-sinensis petals as bio template. Synthesized Nickel nanoparticle thus characterized by SEM, TEM, XRD and wet chemical methods. Spherical Nickel particles of sized between 10nm to 200nm was observed.
Core–shell structured mesoporous silica nanospheres with penetrating mesochannels in the core and radial mesochannels in the shell.
Phase behaviors of a 21-arm star-like diblock copolymer in bulk and under confinement were explored by using the pseudo-spectral method of a self-consistent mean field theory. An asymmetrical phase diagram in bulk was constructed by comparing the free energy of different structures. The gyroid phase was found to posse…
Two classes of heterobimetallic d-f nanoclusters [Ln6Cd24(L(1))11(OAc)43(OH)] and [Ln4Zn8(L(2))2(OAc)20(OH)4] (Ln = Nd and Yb) were prepared using flexible long-chain Schiff base ligands which have (CH2)6 backbones. Their NIR luminescence properties were determined.
A systematic study of the properties of high-density amorphous ice (HDA) in the presence of increasing amounts of salt is missing, especially because it is challenging to avoid ice crystallization upon cooling the pressurized liquid. In order to be able to study HDA also in the presence of small amounts of salt, we ha…