SEARCH · Engineering Papers
Results for “DIAMONDS”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Tunable and Transferable Diamond Membranes for Integrated Quantum Technologies
Not Available
Photonic-Cavity-Enhanced Laser Writing of Color Centers in Diamond
Not Available
Ag–Diamond Core–Shell Nanostructures Incorporated with Silicon-Vacancy Centers
Not Available
Gradient Transformation of the Double Gyroid to the Double Diamond in Soft Matter
Not Available
Comment on 'A planar refractive x-ray lens made of nanocrystalline diamond'[J. Appl. Phys. 108, 123107 (2010)]
The material LuAG (lutetium aluminium garnet) has been confused with LAG (lanthanum aluminium garnet). In general, aluminium garnet phases only occur for the smaller trivalent metal cations and LAG is not known to have been synthesized.
Publisher's Note: “A diamond based neutron spectrometer for diagnostics of deuterium-tritium fusion plasmas” [Rev. Sci. Instrum. 85, 11E101 (2014)]
No abstract prepared.
Publisher's Note: “Electronic properties of graphene-single crystal diamond heterostructures” [J. Appl. Phys. 114, 053709 (2013)]
No abstract prepared.
Diamond Schottky diodes with ideality factors close to 1
The stabilization by vacuum annealing of tungsten carbide/p-diamond Schottky barrier diodes (SBDs) has been investigated. The Schottky barrier height (ϕ{sub B}) and ideality factor (n), at high temperature, were consistently estimated by employing a vertical SBD structure. An exponential drop of ϕ{sub B} in time at 600 K and its stabilization at 1.46 eV after 90 min were reported. The lowest n among SBDs examined was close to 1.0 at 600 K. A linear relation between ϕ{sub B} and n in a statistical electrical characterization suggests a ϕ{sub B} inhomogeneity.
Thermoelectric transport properties of diamond-like Cu{sub 1−x}Fe{sub 1+x}S{sub 2} tetrahedral compounds
Polycrystalline samples with the composition of Cu{sub 1−x}Fe{sub 1+x}S{sub 2} (x = 0, 0.01, 0.03, 0.05, 0.1) were synthesized by a melting-annealing-sintering process. X-ray powder diffraction reveals all the samples are phase pure. The backscattered electron image and X-ray map indicate that all elements are distributed homogeneously in the matrix. The measurements of Hall coefficient, electrical conductivity, and Seebeck coefficient show that Fe is an effective n-type dopant in CuFeS{sub 2}. The electron carrier concentration of Cu{sub 1−x}Fe{sub 1+x}S{sub 2} is tuned within a wide range leading to optimized power factors. The lattice phonons are also strongly scattered by the substitution of Fe for Cu, leading to reduced thermal conductivity. We use Debye approximation to model the low temperature lattice thermal conductivity. It is found that the large strain field fluctuation introduced by the disordered Fe ions generates extra strong phonon scatterings for lowered lattice thermal conductivity.
Erratum: “Molecular dynamics simulation of radiation damage cascades in diamond” [J. Appl. Phys. 117, 245901 (2015)]
No abstract prepared.
Zanamivir immobilized magnetic beads for voltammetric measurement of neuraminidase at gold-modified boron doped diamond electrode
Biomolecule modified magnetic beads has been widely used in separation and sensing process. This study used streptavidin modified magnetic beads to immobilize biotin modified zanamivir. Biotin-streptavidin affinity facilitates immobilization of zanamivir on magnetic beads. Then interaction of zanamivir and neuraminidase was adopted as basic for enzyme detection. Detection of neuraminidase was performed at gold modified BDD using cyclic voltammetry technique. The measurement was carried out based on alteration of electrochemical signals of working electrode as neuraminidase response. The result showed that zanamivir was successfully immobilized on magnetic beads. The optimum amount of magnetic beads for zanamivir immobilization was 120 ug. Linear responses of neuraminidase were detected in concentration range of 0-15 mU. Detection limit (LOD) of measurement was 2.32 mU (R2 = 0.959) with precision as % RSD of 1.41%. Measurement of neuraminidase on magnetic beads could be also performed in the presence of mucin matrix. The linearity range was 0-8 mU with LOD of 0.64 mU (R2 = 0.950) and % RSD of 7.25%.
Publisher's Note: “Investigation of transferred-electron oscillations in diamond” [Appl. Phys. Lett. 108, 212104 (2016)]
No abstract prepared.
Experimental measurement of the diamond nucleation landscape reveals classical and nonclassical features
Not Available
DUST ATTENUATION IN HIGH REDSHIFT GALAXIES: 'DIAMONDS IN THE SKY'
We use observed optical to near-infrared spectral energy distributions (SEDs) of 266 galaxies in the COSMOS survey to derive the wavelength dependence of the dust attenuation at high redshift. All of the galaxies have spectroscopic redshifts in the range z = 2-6.5. The presence of the C IV absorption feature, indicating that the rest-frame UV-optical SED is dominated by OB stars, is used to select objects for which the intrinsic, unattenuated spectrum has a well-established shape. Comparison of this intrinsic spectrum with the observed broadband photometric SED then permits derivation of the wavelength dependence of the dust attenuation. The derived dust attenuation curve is similar in overall shape to the Calzetti curve for local starburst galaxies. We also see the 2175 Å bump feature which is present in the Milky Way and Large Magellanic Cloud extinction curves but not seen in the Calzetti curve. The bump feature is commonly attributed to graphite or polycyclic aromatic hydrocarbons. No significant dependence is seen with redshift between sub-samples at z = 2-4 and z = 4-6.5. The 'extinction' curve obtained here provides a firm basis for color and extinction corrections of high redshift galaxy photometry.