A two-step synthesis for multi-walled carbon nanotube (MWCNT) coating was reported that includes an electrochemical deposition followed by 10 eV hyperthermal proton bombardment at a dose as low as 1×1016 H+/cm2. Electrochemical deposition ensures an improved adhesion of MWCNT coating on metal substrates, while hyperthermal proton bombardment effectively induces inter-chain cross-linkages among ...

The half-widths of five A III and two A I V lines have been measured in a pulsed arc operated in an argon-nitrogen mixture. Electron densities of 3.8 to 8.0 x 1016 c m 3 were determined by laser interferometry at a single wavelength while electron temperatures from 20750° to 23100 ° K were measured from the relative intensities of A l l lines. The experimental A III and A I V Stark profile half...

A method is proposed for arbitrarily engineering the high-order harmonic generation phase achieved by shaping a laser pulse and employing xuv light or x rays for ionization. This renders the production of bandwidth-limited attosecond pulses possible while avoiding the use of filters for chirp compensation. By adding the first 8 Fourier components to a sinusoidal field of 1016 W/cm2, the bandwid...

We have theoretically estimated the change in refractive index A n produced by injection of free carriers in InP, GaAs, and InGaAsP. Bandfilling (Burstein-Moss effect), band-gap shrinkage, and free-carrier absorption (plasma effect) were included. Carrier concentrations of 1016/cm3 to 10i9/cm3 and photon energies of 0.8 to 2.0 eV were considered. Predictions of A n are in reasonably good agreem...

We present a speech coding algorithm called mixeddomain residual coding (MDRC) wherein a prototype pitch cycle in each frame of the speech residual is coded in the time-domain while interpolation of the residual signal is performed in the frequency-domain. A novel quantization scheme takes into account time scaling and di erentially codes successive prototypes with a closed-loop perceptually-we...

A review is presented of recent experiments and diagnostics based on Stark broadening of hydrogen Balmer lines in laser-induced optical breakdown plasmas. Experiments primarily utilize pulsed Nd:YAG laser radiation at 1064-nm and nominal 10 nanosecond pulse duration. Analysis of Stark broadening and shifts in the measured H-alpha spectra, combined with Boltzmann plots from H-alpha, H-beta and H...

2014 Dielectric measurements were performed in a large frequency range (10-4-10+5 Hz) on undoped cis-polyacetylene samples from several laboratories both with ohmic and blocking contacts. The carrier density is low (2 1016 cm-3) and constant but the mobility is thermally activated with a sample and contact dependent activation energy. A maximum activation energy of about 1.6 eV has been found w...