Graphene: Exploring carbon flatland
Just one atom thick, this two-dimensional semiconductor does not resemble any known material.
Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Optics of Liquid Crystal Displays
This tutorial covers an introduction to liquid crystal technology and principles of operation of various modes of liquid crystal displays as well as the development of birefringent optical thin film technologies (e.g., polarizers, compensators) for improving the viewing quality of these displays.
X-ray solution scattering (SAXS) combined with crystallography and computation: defining accurate macromolecular structures, conformations and assemblies in solution
Crystallography supplies unparalleled detail on structural information critical for mechanistic analyses; however, it is restricted to describing low energy conformations of macromolecules within crystal lattices. Small angle X-ray scattering (SAXS) offers complementary information about macromolecular folding, unfold…
Supramolecular Chemistry on Water-Soluble Carbon Nanotubes for Drug Loading and Delivery
We show that large surface areas exist for supramolecular chemistry on single-walled carbon nanotubes (SWNTs) prefunctionalized noncovalently or covalently by common surfactant or acid-oxidation routes. Water-soluble SWNTs with poly(ethylene glycol) (PEG) functionalization via these routes allow for surprisingly high…
Influence of intermittent loading on SCC behavior for an X70 pipeline steel in a near neutral pH solution
Abstract The influence of intermittent loading on stress corrosion cracking (SCC) behavior for an X70 pipeline steel was studied using slow strain rate tests (SSRT) in a near neutral pH soil solution at various applied potentials. The d.c. potential drop method was used to measure the crack initiation and propagation.…
A new quaternary rare earth borate, CsLi2Gd4(BO3)5
Single crystals of caesium dilithium tetragadolinium pentaborate, CsLi2Gd4(BO3)5, were obtained by heating lithium and gadolinium in a caesium borate flux. The structure features chains of edge- and corner-sharing GdOn polyhedra. These chains are interlocked to form [Gd8O16(BO3)2]14− layers, which are connected by…
Shape-Controlled Synthesis of Gold Nanoparticles Under UV Irradiation in the Presence of Poly(Ethylene Glycol)
Dendritic gold nanoparticles and triangular gold plates were synthesized via a simple photochemical reduction protocol. The shape of nanoparticles depended on the concentration of poly(ethylene glycol), which was used on the preparation in an aqueous solution. On the other hand, the size of nanoparticles was controlle…
The effect of moisture imbibition on cellulosic bast fibres as industrial raw materials
The moisture imbibition on four Cellulosic bast fibres, Roselle (Hibiscus Sabdariffa), Okra (Hibiscus esculentus), Baobab (Adansonia digitata) and Kenaf (Hibiscus Cannabinus), were investigated. The fibres were chemically purified by retting, scouring, bleaching and mercerizing. Thereafter, moisture sorption method wa…
Transition Metal-Catalyzed Dissociation of Phosphine−Gallane Adducts: Isolation of Mechanistic Model Complexes and Heterogeneous Catalyst Poisoning Studies
Attempts to induce the catalytic dehydrocoupling of the phosphine-gallane adduct Cy2PH.GaH3 (Cy=cyclohexyl) (1) by treatment with ca. 5 mol% of either the Rh(I) complex [{Rh(mu-Cl)(1,5-cod)}2] (cod=cyclooctadiene) or the Rh(0) species Rh/Al2O3 and [Oct4N]Cl-stabilized colloidal Rh led to catalytic P-Ga bond cleavage t…
High‐pressure behavior of Ni‐filled and Fe‐filled multiwalled carbon nanotubes
Abstract The high‐pressure behavior of Ni‐filled and Fe‐filled multiwalled carbon nanotubes has been investigated up to 27 GPa and 19 GPa, respectively, with the help of synchrotron‐based angle‐dispersive X‐ray diffraction. These nanotubes do not show any structural transformation up to the highest pressures studied.…
Performance of a diatomite-based sorbent in removing mercury from aqueous and oil matrices
Performance of diatomite based mercury sorbent (Chromosorb® QSR) powder and pellets was studied. Test results indicated that this sorbent was highly effective in removing various mercury species from aqueous and oil matrices. More than 99% removal was achieved after 30 min treatment with the diatomite sorbent powder a…
Non-symmetrically substituted phthalocyanines: synthesis and structure modification
The presently known approaches to the synthesis of non-symmetrically substituted phthalocyanines of the A3B and A2B2 types are surveyed. The prospects for the use of these compounds for the synthesis of binuclear and heteronuclear complexes and phthalocyanine oligomers and polymers are demonstrated.
Preparation and characterization of polymeric micelles from poly(D, L-lactide) and methoxypolyethylene glycol block copolymers as potential drug carriers
Amphiphilic diblock copolymers composed of methoxy polyethylene glycol (MePEG) and poly(D, Llactide) (PDLLA) were prepared for the preparation of polymeric micelles. The use of MePEG-PDLLA as drug carriers has been reported in the open literature, but there are only few data on the application of a series of MePEG-PDL…
Space Charge Signature and Its Effects on Ionic Transport in Heterogeneous Solids
The Arrhenius plots of heterogeneous solids comprising of lithium aluminum titanium phosphate (LATP) glass–ceramic, Al 2 O 3 , and Ba 0.6 Sr 0.4 TiO 3 (0.6 BST) exhibit an inflection or peak around 27°C, which is interpreted as a signature of space charge. The space charge is formed by the adsorption of lithium ions o…
Photocurrent spectroscopy of deep levels in ZnO thin films
Epitaxial ZnO(0001) thin films have been grown by pulsed-laser deposition on $a\text{\ensuremath{-}}{\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ and investigated by deep level transient spectroscopy (DLTS) and by Fourier transform infrared photocurrent (FTIR-PC) spectroscopy in the midinfrared wavelength range. FTIR-PC spectra…
Chemical End-Grafting of Homogeneous Polystyrene Monolayers on Mica and Silica Surfaces
Homogeneous polystyrene monolayers covalently end-attached on mica and silica surfaces were obtained using a "graft to" methodology. The grafting was achieved via nucleophilic substitution between silanol groups (Si-OH) containing surface and monochlorosilyl terminated polystyrene (PS). Different parameters, such as s…
THREE-DIMENSIONAL NUMERICAL SIMULATIONS OF A PHASE-FIELD MODEL FOR ANISOTROPIC INTERFACIAL ENERGY
A computationally efficient numerical scheme is presented for the phase-field model of two-phase systems for anisotropic interfacial energy. The scheme is solved by using a nonlinear multigrid method. When the coefficient for the anisotropic interfacial energy is sufficiently high, the interface of the system shows co…
Specific Surface Effects on the Storage of Hydrogen on Carbon Nanostructures
We present a study of the adsorption of hydrogen on nanotube bundles and 4 different carbon fragment geometries as a function of their specific surface. The sorption process is investigated using grand canonical Monte Carlo methods in terms of the gravimetric and volumetric storage densities, as a function of radius,…
Nd/V Co‐Doped Bi 4 Ti 3 O 12 Powder Prepared By Molten Salt Synthesis
Powders of Nd/V‐doped Bi 4 Ti 3 O 12 with a composition Bi 3.74 Nd 0.26 Ti 2.98 V 0.02 O 12.01 (BNTV), prepared by the molten salt synthesis, using chlorides as the fluxes, were successfully obtained. The influences of the molar ratio of KCl to NaCl, temperature, and soak time on the formation and morphology of BNTV w…
Dendritic Functionalization of Metal Nanoparticles for Nanoparticle-Cored Dendrimers
This paper presents a concise review of synthetic strategies for nanoparticle-cored dendrimers from metal nanoparticles, with an emphasis on their current applications. The synthesis of nanoparticle-cored dendrimers represents an important advance to the control and preparation of new organized nanostructures. The mos…