Carbon nanotubes are a good realization of one-dimensional crystals where basic science and potential nanodevice applications merge. Defects are known to modify the electrical resistance of carbon nanotubes; they can be present in as-grown carbon nanotubes, but controlling their density externally opens a path towards the tuning of the electronic characteristics of the nanotube. In this work, c...

The edge versions of reverse Wiener indices were introduced by Mahmiani et al. very recently. In this paper, we find their relation with ordinary (vertex) Wiener index in some graphs. Also, we compute them for trees and TUC4C8(s) naotubes.

Photonic signal processing requires efficient on-chip light sources with higher modulation bandwidths. Today’s conventional fastest semiconductor diode lasers exhibit modulation speeds only on the order of a few tens of GHz due to gain compression effects and parasitic electrical capacitances. Here we theoretically show an electrically-driven carbon nanotube (CNT)-based laser utilizing strong l...

Dynamics of magnetization domain walls (DWs) in thin ferromagnetic nanotubes subject to weak longitudinal external fields is addressed analytically in the regimes of strong and weak penalization. Exact solutions for the DW profiles and formulas for the DW propagation velocity are derived in both regimes. In particular, the DW speed is shown to depend nonlinearly on the nanotube radius. The prob...

• Carbon nanotube (CNT) membranes for next generation water desalination • Tip-functionalized nonpolar CNT-interior facilitates water influx and rejects salts. • These robust, antibacterial and antifouling CNT-membranes removemost pollutants. ⁎ Corresponding author. Tel.: +60 3 7967 6959; fax: + E-mail address: [email protected] (M.E. Ali). 0011-9164/$ – see front matter © 2013 Elsevier B.V. A...

the edge versions of reverse wiener indices were introduced by mahmiani et al. veryrecently. in this paper, we find their relation with ordinary (vertex) wiener index in somegraphs. also, we compute them for trees and tuc4c8(s) naotubes.

Organometallic compounds such as phthalocyanine are useful precursors for carbon nanotube formation by pyrolysis because they can supply both carbon and metal catalysts needed for synthesis. Prior milling of iron-phthalocyanine (FePc, FeC32H16N8) is investigated and shown to affect the sublimation temperature of the precursor and the nanotube diameter. Without prior milling, a sublimation tempe...

A series of observations of polymer sheathing in multiwalled carbon nanotube (MWCNT)−polycarbonate composites are presented. This sheathing was observed in images of the composite fracture surface and is consistent with diameter distributions of the as-received and embedded MWCNTs. A novel nanomanipulation experiment, where the sheathing balls up when contacted by an AFM tip, confirms this phen...

We have simulated the heat conduction characteristics of finite length single walled carbon nanotubes (SWNTs) with the molecular dynamics method [1-3] with Tersoff-Brenner bond order potential. Temperature at each end of a SWNT was controlled by the phantom technique, and the thermal conductivity was calculated with Fourier’s law from the measured temperature gradient and the energy budgets in ...