Materials Literature
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Spin dynamics evolution of BaFe2(As(1-x)Px){2} was probed as a function of P concentration via 31P NMR. Our NMR study reveals that two-dimensional antiferromagnetic (AF) fluctuations are notably enhanced with little change in static susceptibility on approaching the AF phase from the superconducting dome. Moreover, th…
A simple one-step process has been developed to render aluminum alloy surfaces superhydrophobic by immersing the aluminum alloy substrates in a solution containing NaOH and fluoroalkyl-silane (FAS-17) molecules. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and water contact angle measurem…
“Square-within-a-square”: The first Cr–Dy single-molecule magnet (SMM) with an energy barrier to spin reorientation of 15 K is presented. The anisotropy in this octanuclear compound arises from the orientations of the four DyIII centers (dark blue), which, in conjunction with the contributions from the CrIII centers (…
This paper reviews the growth of diamond by chemical vapour deposition (CVD). It includes the following seven parts: (1) Properties of diamond: this part briefly introduces the unique properties of diamond and their origin and lists some of the most common diamond applications. (2) Growth of diamond by CVD: this part…
The fabrication of nanoscale membranes exhibiting high selectivity is an emerging field of research. The possibility to use bottom-up approaches to fabricate a filter with porous graphene and analyze its functionality with first principle calculations is investigated. Here, the porous network is produced by self-assem…
We presented a detailed study of the oxidation functional groups (epoxide and hydroxyl) on graphene based on density-functional calculations. Effects of single functional groups and their various combinations on the electronic and structural properties are investigated. It is found that single functional groups can in…
The dynamic nature of the first water adlayers on solid surfaces at room temperature has made the direct detection of their microscopic structure challenging. We used graphene as an atomically flat coating for atomic force microscopy to determine the structure of the water adlayers on mica at room temperature as a fun…
Abstract Freeze drying is a process whereby solutions are frozen in a cold bath and then the frozen solvents are removed via sublimation under vacuum, leading to formation of porous structures. Pore size, pore volume and pore morphology are dependent on variables such as freeze temperature, solution concentration, nat…
Graphene, a monoatomic layer of graphite, hosts a two-dimensional electron gas system with large electron mobilities which makes it a prospective candidate for future carbon nanodevices. Grown epitaxially on silicon carbide (SiC) wafers, large area graphene samples appear feasible and integration in existing device te…
Single-walled carbon nanotubes (SWNTs) have been previously observed to be strong antimicrobial agents, and SWNT coatings can significantly reduce biofilm formation. However, the SWNT antimicrobial mechanism is not fully understood. Previous studies on SWNT cytotoxicity have concluded that membrane stress (i.e., direc…
Characterizing nanoparticle dispersions and understanding the effect of parameters that alter dispersion properties are important for both environmental applications and toxicity investigations. The role of particle surface area, primary particle size, and crystal phase on TiO2 nanoparticle dispersion properties is re…
In this article, the role of kinetics, in particular, the pressure of the reaction chamber in the chemical vapor deposition (CVD) synthesis of graphene using low carbon solid solubility catalysts (Cu), on both the large area thickness uniformity and the defect density are presented. Although the thermodynamics of the…
In this contribution we demonstrate a method of synthesizing a hexagonal boron nitride (h-BN) thin film by ambient pressure chemical vapor deposition on polycrystalline Ni films. Depending on the growth conditions, the thickness of the obtained h-BN film is between ∼5 and 50 nm. The h-BN grows continuously on the enti…
The surface plasmon-polaritons and waveguide modes in prismatic structures are researched. The metallic layer is deposited on glass prism in the first structure and dielectric layer was deposited on metallic film in the second structure. The reflectance from the metallic layer equal zero at assiduously defined paramet…
Materials with systematic absence of X-ray diffraction (XRD) peaks are desirable for conducting some special researches using X-ray diffraction or time-resolved X-ray scattering. This paper proposes a method for designing this kind of materials. It utilizes solid solution to reduce the structure factor of a selected r…
采用等压法研究了308.15 K 下NaCl-H2O、CaCl2-H2O 和NaCl-CaCl2-H2O 体系离子强度分别为0.5666~5.9265 mol kg−1、0.3943~5.5573 mol kg−1 和0.6524~16.6631 mol kg−1 的等压平衡浓度和水活度, 计算了渗透系数及饱和蒸汽压, 获得了该体系渗透系数和饱和蒸汽压随离子强度的变化规律. 应用Pitzer 离子相互作用模型, 用实验数据用多元线性回归拟合了308.15 K 下该体系的NaCl 和CaCl2 的纯盐参数β(0)、β(1)、Cφ 分别为0.3181、1.5346、−0.0014 和0.07972、 0.3067、0.00075, 拟…
Abstract : Numerical simulations of compression Hopkinson bar tests on soft, nearly incompressible materials were performed in an effort to understand inertial effects in these tests. The specimen was modeled as either a linear elastic or a nonlinear elastic solid; the nonlinear model was calibrated to ballistic gelat…
First-principle calculations have become a valuable tool in the study and exploration of new energy hydrogen storage materials. In this paper, novel results and important progresses on the first-principle calculations of hydrogen storage materials are introduced. The application of first-principle calculations in hydr…
Problem statement: In the last decade, the studies and investigation on polymer-based composites have drawn significant attention owing to improvement in their mechanical, thermal, electrical, optical and pharmaceutical properties as compared with pure polymer. Approach: Different compositions of Ni 0.2 Zn 0.8 Fe 2 O…
Abstract Porphyrin‐ or zinc‐porphyrin‐cyanuric acid conjugants (TPP‐CA or ZnTPP‐CA) and anthraquinone connected with the known "Hamilton receptor" (AQ‐H) were synthesized. The supramolecular dyads constructed via the AQ‐H and TPP‐CA/ZnTPP‐CA exhibit six hydrogen bonds, which provide the association constant K APP appr…