Materials Literature
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The electromechanical coupling in ferroelectric materials is controlled by several coexisting structural phenomena which can include piezoelectric lattice strain, 180° and non‐180° domain wall motion, and interphase boundary motion. The structural mechanisms that contribute to electromechanical coupling have not been…
ZnO/reduced graphite oxide composites were synthesized using a two-step method in which KOH reacts with Zn(NO 3 ) 2 in the aqueous dispersions of graphite oxide (GO) to form a Zn(OH) 2 /graphite oxide precursor, followed by thermal treatment in air. It was found that the dispersion of reduced graphene oxide (rGO) shee…
Invisibility cloaks, a subject that usually occurs in science fiction and myths, have attracted wide interest recently because of their possible realization. The biggest challenge to true invisibility is known to be the cloaking of a macroscopic object in the broad range of wavelengths visible to the human eye. Here w…
The synthesis using the thermal decomposition of metal trifluoroacetates is being widely used to prepare oleate-capped lanthanide-doped upconverting NaYF(4):Er(3+)/Yb(3+) nanoparticles (Ln-UCNPs). These nanoparticles have no inherent aqueous dispersibility and inconvenient postsynthesis treatments are required to rend…
Current Food and Drug Administration-approved cancer nanotherapeutics, which passively accumulate around leaky regions of the tumor vasculature because of an enhanced permeation and retention (EPR) effect, have provided only modest survival benefits. This suboptimal outcome is likely due to physiological barriers that…
The crystal structure of the title compound, [Zn{CO(NH(2))(2)}(6)](NO(3))(2), has been determined at 110 and 250 K. The structure is stabilized by 12 individual hydrogen bonds, both intra- and intermolecular. Analysis of the thermal expansion tensor, based on unit cells determined over a temperature range of 180 K, sh…
We proposed a magnetoelectric (ME) composite transformer by bonding a Rosen-type transformer and a Terfenol-D plate, whose voltage step-up ratio could be controlled by an applied magnetic field. When applying a sine signal on the input port of the transformer, an amplifying signal was produced at the output port becau…
Abstract Microcrystalline undoped as well as cerium‐doped lead tungstate (PbWO 4 ) powder with different phase and shape, were successfully synthesized via a low‐temperature hydrothermal method using different lead sources (lead acetate and lead nitrate) and Na 2 WO 4 as metallic cations and distilled water as solvent…
A novel multi-walled carbon nanotube (MWNT) growth process is reported based on carbon incorporation in a nickel catalyst layer deposited via plasma-enhanced atomic layer deposition (PEALD) on silicon nanowires and silicon wafer substrates. As-deposited PEALD Ni films containing relatively high amounts of carbon (>18…
OBJECTIVES: To determine the capacity of human serum proteins to bind to titanium dioxide (TiO(2)) particles of different polymorphs and sizes. METHODS: TiO(2) particles were mixed with diluted human serum, purified human serum albumin (HSA) or purified human serum gamma-globulin (HGG) solutions. After incubation at 3…
Constructing dye supramolecular aggregates and regulating their structures have been very important tasks in recent years due to their excellent properties and promising applications in many fields. In this paper, four kinds of aggregates have been constructed by using a cyanine dye under controllable conditions, and…
Using molecular dynamics simulations we present the ⟨1 1 0⟩ → ⟨0 0 1⟩ reorientation and pseudoelasticity induced by axial strain in iron nanowires. The reorientation mechanism shows an intricate dependence on the deformation temperature. Specifically, the original ⟨1 1 0⟩ nanowires and the reorientated ⟨0 0 1⟩ counter…
Abstract The microstructure of a diblock copolymer dispersed in nanorod arrays grafted on a plate are investigated via annealing MC simulation. The confinement in nanorod arrays provides a complex confined space which leads to complicated microphase separation structures. Different morphologies of top and bottom of th…
A metallic (semiconducting) single-wall nanotube contains an irrational (integral) number of carbon hexagons in the pitch. The room-temperature conductivity is higher by two to three orders of magnitude in metallic nanotubes than in semiconducting nanotubes. Tans et al. [Nature386 (1997) 474] measured the electrical c…
采用熔融共混法制备了碳纳米管(CNT)填充改性的聚对苯二甲酸丙二酯(PTT)/乙烯-醋酸乙烯酯共聚物(EVA)三元复合材料.通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、接触角测量仪、旋转流变仪等研究了该复合材料中碳纳米管的分布、不相容的相形态以及流变和力学性能.研究结果表明,与EVA相比,PTT组分具有较低的黏度以及与CNT较好的亲和性;因此三元体系中,CNT主要分布于PTT连续相和两相界面中.CNT的这种选择性分布显著减小了EVA分散相液滴的尺寸,增加了两相界面粘结,提高了三元复合材料的模量和塑性形变的能力,起到了增容、增塑的效果.
Structures and magnetic properties of Y2O3:Co nanocrystals were investigated using high resolution transmission electron microscopy, x-ray diffraction, x-ray absorption fine structures, and superconducting quantum interference device. Cobalt atoms were found to be driven by thermal annealing from interstitial location…
We present a method for visualizing the geometrical distribution of a liquid crystal (LC) arrangement using the replication of the molecular orientation by a mixture of alignment layers. We found that the anisotropic diffusion of the reactive mesogen (RM) monomers, mixed with an alignment layer, in contact with the LC…
A simple model is developed to investigate the potential profile changes due to mechanical stress at the ferromagnetic/ferroelectric interfaces of ferromagnetic-ferroelectric-ferromagnetic tunnel junctions with an ultrathin ferroelectric barrier. The potential changes associated with the polarization variation have si…
Targeted PEGylated liposomes could increase the amount of drugs or radionuclides delivered to tumor cells. They show favorable stability and pharmacokinetics, but steric hindrance of the PEG chains can block the binding of the targeting moiety. Here, specific interactions between an antihapten antibody (clone 734, spe…
We report an atomistic molecular statics study of strains in single wall carbon nanotubes (SWCNTs) interfaced with a planar nickel surface. We calculate axial and radial strain distributions along the SWCNT axis. We demonstrate axial strains of up to 2% extending over a distance of ∼ 10 nm away from the interface alon…