Materials Literature
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This letter reports the electrical and field-emission properties of Au-decorated boron nitride nanotubes (Au-BNNTs). The insulating BNNTs become metallic after Au coating as the Au coverage exceeds a critical value. The Au decoration modifies the work function of the BNNTs and, as a consequence, the field-emission cur…
We present a new field-extrema hysteresis loss model (FHM) for high-frequency ferrimagnetic materials, along with a parameter identification procedure. The model does not involve solving an ordinary differential equation (ODE) and is asymmetric in that it works well under dc bias conditions. In the proposed model, the…
The naturally occurring fabrics belonging to the species Ceiba pentandra and Agave Vera Cruz were used as reinforcements in the present study. The unsaturated polyester (UP) resin based kapok/sisal hybrid composites were developed by the hand lay-up technique at room temperature. The variations in mechanical propertie…
Temperature and frequency dependence of dielectric permittivity in nanotextured ceramics of PbMg1∕3Nb2∕3O3 has been performed in a wide range of grain sizes and shown to display strong variation. In particular, frequency relaxation follows the Vögel Fulcher law for the high grain sizes, whereas for intermediate sizes,…
We have investigated the effect of the electric contact resistance in nano devices by manufacturing dedicated chips with four-point contacted platinum nanowires and individual, suspended, and four-point contacted carbon nanotubes. For both cases, we measured the intrinsic electrical resistance and the electrical conta…
The thermomechanical Lehmann coefficient ν is directly measured as a function of temperature in a compensated cholesteric liquid crystal. The method consists of observing the continuous rotation of the director in samples treated for planar sliding anchoring when a temperature gradient is applied perpendicularly to th…
We performed first-principles calculations to study the energetics, geometric and electronic properties of zinc sulfide (ZnS) nanostructures. ZnS nanowires (ZnSNWs), nanotubes (ZnSNTs) and nanosheets (ZnSNSs) were considered. Both ZnSNWs and ZnSNTs modeled using hexagonal prisms with the atomic arrangement displaying…
The elastic scattering mean free path (mfp) in a graphene nanoribbon (GNR) is characterized to be short. In the absence of other scattering mechanisms, elastic scattering has a large effect on the source-drain current of a GNR field-effect transistor due to its quasi-one-dimensional channel. In the presence of optical…
We report a facile method for synthesizing single-crystal rutile TiO2 nanowires using atmospheric-pressure, chemical vapor deposition with Ti and TiO as precursors. The synthesis is found to depend critically on the predeposition of a layer of metallic Ti on the Ni catalysts layer. The omission of this step seems prev…
We investigate the changes in the infrared response due to charge carriers introduced by electrostatic doping of the correlated insulator vanadium dioxide (VO2) integrated in the architecture of the field effect transistor. Accumulation of holes at the VO2 interface with the gate dielectric leads to an increase in inf…
Abstract Silk‐fibroin (SF)‐fiber‐reinforced poly(ε‐caprolactone) (PCL) biocomposites with different fiber contents were fabricated by a melt‐blending method. The mechanical and viscoelastic properties of these SF/PCL composites were investigated by mechanical property testing, dynamic mechanical thermal analysis, and…
We demonstrate that the multibands of negative refraction indexes in the left-handed metamaterials may be appeared based on multiple dendritic structures cells. Employing microwave transmission experiment, the medium exhibits simultaneous negative refraction at the frequencies of 9.50, 10.24, and 10.78GHz for the elec…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Ashkan Behnam, Jason L. Johnson, Yongho Choi, M. Günhan Ertosun, Ali K. Okyay, Pawan Kapur, Krish…
Nanofabrication gives us the ability to mimic biological structures with molecular level precision. Offering a natural progression of topics, Nanotechnology and Tissue Engineering: The Scaffold provides a state-of-the-art account of groundbreaking research in this rapidly emerging area of biomedical engineering. Empha…
This work presents the design of a planoconcave parabolic negative index metamaterial lens operating at millimeter wavelengths fabricated by using stacked subwavelength hole arrays. A staircase approximation to the ideal parabola profile has been done by removing step by step one lattice in each dimension of the trans…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Yoshitaka Kawasugi, Hiroshi M. Yamamoto, Mutsumi Hosoda, Naoya Tajima, Takeo Fukunaga, Kazuhito T…
In this paper, a compact model of phase-change memory based on the rate equations of crystallization and amorphization will be presented and confirmed by measurement. The model reproduces the nonlinear current-voltage behavior of both the "set" and "reset" states. Temperatures in the phase-change layer are calculated…
The crystallization kinetics of as-deposited and ion implanted amorphous Ge2Sb2Te5 thin films has been measured by time resolved reflectivity. An enhancement of the crystallization process occurred in the implanted samples. Raman scattering analysis was used to correlate the stability of the amorphous phase to its str…
We report a study of partial demagnetization of axially pressed sintered Nd-Fe-B magnets by inclined pulse demagnetization measurements, including a recoil behavior of the Nd-Fe-B material. From these measurements, we develop a simple empirical model for demagnetization of Nd-Fe-B magnets caused by an inclined field.…
The natural fiber composites based on kapok/sisal and its hybrid composites with polyester as resin matrix have been prepared and tested for mechanical properties. In this paper hardness and flexural properties of kapok/sisal composites were determined with reference to the fabrics content and varying the volume ratio…