doping – Page 2 – TechConnect Briefs

Effect of doping on the radial breathing mode of carbon nanotubes

Gerber I.C., Puech P., Gannouni A., Bacsa W.S., CEMES-CNRS, FR

Doping CNTs is an attractive alternative to control the electronic conductivity of CNTs independent of their diameter. Highly conducting nanotubes are of interest for applications in transparent thin film electrodes. When doping CNTs through substitution [...]

Aluminium-Doped ZnO Films and Nanowires by a Modified Chemical Vapor Deposition Technique

Pung S.Y., Choy K.L., University of Nottingham, UK

ZnO has unique properties such as wide-bandgap (3.37eV) and large exciton binding energy (60meV) at room temperature. These properties made ZnO a promising material for short wavelength photonic devices for examples, light emitting diode (LED) [...]

Closed Form Current and Conductance Model for Symmetric Double-Gate MOSFETs using Field-dependent Mobility and Body Doping

Hariharan V., Thakker R., Patil M.B., Vasi J., Rao V.R., IIT Bombay, IN

In this paper we present a completely closed-form inversion charge-based model for the drain current and conductance of a symmetric double-gate MOSFET based on the drift-diffusion transport mechanism, that takes into account vertical field mobility [...]

Chemical doping by sulfuric acid in double wall carbon nanotubes

Puech P., Ghandour A., Sapelkin A., Flahaut E., Dunstan D., Bacsa W., CEMES CNRS Univ Toulouse, FR

Charge transfer due to chemical doping in carbon nanotubes [1] can be detected through changes in the band shape and spectral shifts of the Raman G-band. In double wall carbon nanotubes, the inner tube is [...]

Polypyrrole-Organoclay Nanocomposites for Gas Sensors

Magaraphan R., Thuimthad A., Chulalongkorn University, TH

Polypyrrole (PPy) was synthesized in the presence of octadecylammonium-montmorillonite (OC-MMT) 1-9 wt% using ferric chloride as an initiator to result the intercalated nanocomposites. The synthesized PPy and its nanocomposites were tested for volatile organic gases; [...]

Nanostructured photocatalytic TiO2-xNx thin films prepared by reactive magnetron sputtering

Teodorescu C.-M., Luca D., National Institute of Materials Physics, RO

Nitrogen-doped titania films were grown by magnetron sputtering. XPS analysis was used to identify the nitrogen content and the oxygen stoichiometry of the samples. XANES evidenced an increase of the Ti 3d charge density. XRD [...]