Materials Literature
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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…
A large reversible negative magnetic-entropy change ΔSM has been observed in TbCoC2, accompanied by a second-order phase transition at 28K. The maximum value of −ΔSM is 15.3Jkg−1K−1 at 30K for a magnetic-field change from 0to5T, with the refrigerant capacity of 354Jkg−1. In particular, also the large −ΔSMmax of 7.…
Radiative lifetimes of high quality Mn:ZnSe nanocrystals synthesized by nucleation-doping method are experimentally measured at wavelength near 580nm. The slow decay rate in millisecond time scale is identified as the radiative decay from the T14 metastable excited state of Mn2+ ions embedded in the ZnSe nanocrystals.…
On the basis of the Kubo formula we evaluated the optical conductivity of a graphene sheet. The full behavior of frequency as well as temperature dependence of the optical conductivity is presented. We show that the anisotropy of conductivity can be significantly enhanced at high frequencies. The photon absorption dep…
The ability to create bio-functional nanoprobes for the detection of biological reactivity is important for developing bioassay and diagnostic methods. This paper describes the findings of an investigation of the surface functionalization of gold (Au) and magnetic nanoparticles coated with gold shells (M/Au) by protei…
A large reversible magnetocaloric effect has been observed in Tb3Co compound. Under a magnetic field change of 5T, the maximum value of magnetic entropy change ΔSM is −18Jkg−1K−1 at 84K and the relative cooling power is 738Jkg−1 with no hysteresis loss. In particular, the large reversible ΔSMmax, −8.5Jkg−1K−1, is achi…
Individual multiwall boron nitride nanotubes with diameters from 30 nm to 110 nm are shown to be efficient UV emitters by cathodoluminescence. Their luminescence does not evolve much in this diameter range, with dominant UV recombinations at about 230 nm. As a result, single nanotube properties can be obtained from ex…
Liquid state theory is employed to study phase transitions and structure of dense mixtures of hard nanoparticles and flexible chains (polymer nanocomposites). Calculations are performed for the first time over the entire compositional range from the polymer melt to the hard sphere fluid. The focus is on polymers that…
Electric double-layer transistors have recently attracted a growing interest because of their low operating voltage and capacity for accumulation of high carrier density. Here, we demonstrate an electric double-layer transistor with a NiO single-crystal Mott insulator that displays a p-type behavior with a field-effec…
The results of a resonant Raman scattering (RRS) study of polymer-stabilized colloidal CdSe nanoparticles (NPs) are reported. The size-selective nature of the RRS is demonstrated by analysing the NP ensembles with different average size [Formula: see text] and size distribution Δd using a set of excitation wavelengths…
Our first-principles calculations reveal surprisingly high sensitivity of the field-induced energy gap of bilayer graphene to changes in its interlayer spacing. Small adjustments in the interlayer spacing near its equilibrium value produce large modulations in the gap over a wide range of field strength. We elucidate…
The Ni44.1Mn44.2Sn11.7 ribbons were prepared by melt spinning. A single-phase austenite with L21 structure was confirmed in the melt-spun ribbons at room temperature. After the heat treatment, the martensitic transformation temperature increases obviously in the annealed ribbons. This method may be an effective way to…
Diamondoids and their derivatives have found major applications as templates and as molecular building blocks in nanotechnology. Applying ab initio method, we calculated the quantum conductance and the essential electronic properties of two lower diamondoids (adamantane and diamantane) and three of their important der…
Random silver nanohole films were created through colloidal lithography techniques and metal vapor deposition. The transparent electrodes were characterized by uv-visible spectroscopy and incorporated into an organic solar cell. The test cells were evaluated for solar power-conversion efficiency and incident photon-to…