Chemical functionalization of carbon nanotubes by carboxyl groups on Stone-Wales defects: A density functional theory study

Article Abstract:

An investigation is conducted of chemical functionalization of carbon nanotubes with Stone-Wales (SW) defects by carboxyl (COOH) groups by density functional calculations. The functionalization by introducing functional groups on the topological defects provides a pathway for applications of carbon nanotubes in chemical sensors and nanobioelectronics.

Chemical properties, Carboxyl compounds

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Longitudinal polarizability of carbon nanotubes

Article Abstract:

First principles density functional theory (DFT) is used to investigate the longitudinal polarizabilities of carbon nanotubes. The results have shown that the longitudinal polarizabilities follow a simple trend and are determined entirely by band gap when the polarizability is normalized for the number of atoms in the unit cell.

Polarization (Light)

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Ti[O.sub.2] surface modification and characterization with nanosized PbS in dye-sensitized solar cells

Article Abstract:

Nanosized PbS is fabricated on the Ti[O.sub.2] films and the components of the modified Ti[O.sub.2] films are studied by X-ray diffraction (XRD) and electron probe microanalysis (EPMA). The results have shown that the surface modification with optimum nanosized PbS on Ti[O.sub.2] leads to a performance improvement effectively.

Electric properties, X-rays, X-ray diffraction, Titanium compounds, Lead compounds

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