Materials Literature
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。
Physics-based equivalent circuit models are presented for armchair and zigzag graphene nanoribbons (GNRs), and their conductances have been benchmarked against those of carbon nanotubes and copper wires. Atomically thick GNRs with smooth edges can potentially have smaller resistances compared with copper wires with un…
We investigate the effects of transition metals (TM) on the electronic doping and scattering in graphene using molecular-beam epitaxy combined with in situ transport measurements. The room-temperature deposition of TM onto graphene produces clusters that dope $n$ type for all TM investigated (Ti, Fe, and Pt). We also…
A novel multiferroic heterostructure consisting of a FeGaB thin film and a PZN-PT single crystal slab shows giant tunability of the ferromagnetic resonance (FMR) frequency of the heterostructure by electric field (see figure). The overall electric-field-induced FMR frequency change of 5.82 GHz is the largest reported…
We have measured the dispersibility of single-walled carbon nanotubes in a range of solvents, observing values as high as 3.5 mg/mL. By plotting the nanotube dispersibility as a function of the Hansen solubility parameters of the solvents, we have confirmed that successful solvents occupy a well-defined range of Hanse…
In modern technology, there is a constant need to solve very complex problems and to fine-tune existing solutions. This is definitely the case in modern medicine with emerging fields such as regenerative medicine and tissue engineering. The problems, which are studied in these fields, set very high demands on the appl…
In this work we demonstrate a facile means to generate fluorescent carbon nanoribbons, nanoparticles, and graphene from graphite electrode using ionic liquid-assisted electrochemical exfoliation. A time-dependence study of products exfoliated from the graphite anode allows the reconstruction of the exfoliation mechani…
The apparent field-effect-transistor (FET)-like operations of a device based on a network of single-walled carbon nanotubes (SWCNTs) are elucidated with the help of local probe electrical characterization methods using an atomic force microscope. The apparent switching behavior of the device with an on-off ratio>10(4)…
Copper matrix composite thin films reinforced with multiwall carbon nanotubes (CNT-Cu-MC) have been processed by electroplating on conducting or insulating underlayers on oxidized (100)Si substrates using iron catalyst particles. The nanotubes were grown by thermal or plasma enhanced catalytic CVD process. Enhanced in…
Highly ordered La2/3Ca1/3MnO3 nanotube arrays were successfully synthesized by a simple and rapid process, combining nanoporous alumina template-assisted synthesis with microwave irradiation. The method offers a quick hands-on route to produce manganite bulk sample and nanotube arrays at relative low-temperatures. We…
Abstract Super‐hydrophobic surface‐modification of silicone rubber (SIR) as an outdoor insulator by CF 4 radio frequency (RF) inductively coupled plasma (ICP) and capacitively coupled plasma (CCP) has been studied. X‐Ray photoelectron spectroscopy, atomic force microscopy, and static contact angle measurements were em…
Recent research on second-harmonic generation in left-handed materials has shown a light localization mechanism that originates from an all-angle phase-matching condition between counterpropagating electromagnetic modes at fundamental and double frequencies. By combining these properties with negative refraction, we p…
Advanced oxidation technologies (AOT) were applied for the production of accurately controlled oxidized multi-walled carbon nanotubes. Fenton process is effective to get carboxylic (-COO- or -COOH) and OH groups on the surface of carbon nanotubes while Photofenton and UV/H2O2 processes mostly produce OH groups on surf…
A sonochemical method was used to synthesize carbon nanotube (CNT) in the presence of dichlorobenzene and ZnCl2 under ambient conditions. Structural characterizations were carried out using Raman spectroscopy, X-ray diffraction (XRD) and X-Ray photoelectron spectroscopy (XPS) which confirmed successful formation of CN…
Nylon-6/single-walled carbon nanotube (SWNT) nanocomposites with different SWNTs loadings were prepared by melt-blending. An efficient dispersion of SWNTs into the nylon-6 matrix was confirmed by scanning electron microscopy. DSC and time-resolved synchrotron X-ray diffraction were used to provide detailed information…
Fe3O4/poly(St-co-MPS) particles were prepared by encapsulation of Fe3O4 nanoparticles into copolymers of styrene (St) and 3-trimethoxysilylpropylmethacrylate (MPS) (poly(St-co-MPS)) prepared by miniemulsion copolymerization. It is found that the structure of the Fe3O4/poly(St-co-MPS)/SiO2 composite particles prepared…
We use resonance Raman scattering (incident photon energies between 1.8 and 4.13 eV), $\text{LDA}+\text{U}$ calculations, spectroscopic ellipsometry, and oblique IR reflectivity to characterize the strong electron-phonon interactions in the disordered perovskite ${\text{LaFe}}_{0.5}{\text{Cr}}_{0.5}{\text{O}}_{3}$. Wh…
We investigate the ballistic thermal conductance of electrons in gated graphene ribbons with width above 20 nm and clarify both the temperature and the Fermi-level dependences. In the intrinsic graphene ribbons, the normalized thermal conductance by the quantum conductance, ${\ensuremath{\kappa}}_{0}$, increases monot…
The 0 K onsets (E(0)) of a series of trichlorosilane derivatives SiCl(3)R --> SiCl(3)(+)+ R(*) (R = Cl, H, CH(3), C(2)H(5), C(2)H(3), CH(2)Cl, SiCl(3)) are measured by threshold photoelectron-photoion coincidence spectroscopy. The well-known heat of formation of SiCl(4) is used as an anchor to determine the heat of fo…
Microstructural evolution of ZK60 magnesium alloys, during twin roll cast (TRC) and hot compression (HC) with a strain rate of 0.1 s−1 at 350 °C and subsequent annealing at temperatures of 250–400 °C for 102−5 × 105 s, has been observed by optical microscopy (OM), transmission electron microscopy (TEM) and electron ba…
We report the realization of superconductivity by $5d$ element Ir doping in LaFeAsO, a prototype parent compound of high-temperature iron-based superconductors. X-ray diffraction patterns indicate that the material has formed the ZrCuSiAs-type structure with a space group $P4/\text{nmm}$. The systematic evolution of t…