pH-triggered release of materials from single-walled carbon nanotubes using dimethylamino-functionalized fullerenes as removable "corks"

Dimethylamino-functionalized fullerenes (pf-C60) have been used as removable "corks" at the openings of filled single-walled carbon nanotubes (SWCNTs). In a proof-of-principle study, SWCNTs have been filled with copper acetate or uranyl acetate, and these encapsulated materials then "corked" with pf-C60. The use of pf-C60 as "corks" allows the removal of the large amount of external acetate present after the filling step and a pH-triggered release of the encapsulated materials. A pH-sensitive discharge of the cargo would be of interest, for instance, in drug delivery systems. © 2010 Elsevier Ltd. All rights reserved

Electron promotion by surface functional groups of single wall carbon nanotubes to overlying metal particles in a fuel-cell catalyst.

A remarkable promotion: Functional groups added onto single-wall carbon nanotubes (SWNTs) can significantly influence the activity of a noble metal for formic acid oxidation. Phenolate groups on SWNTs under alkaline conditions can double the activity of 20 % w/w Pd compared to unmodified SWNTs. This catalyst has 14 times higher activity than the commercial benchmark catalyst (10 % w/w Pd on Vulcan)

Sidewall functionalisation of carbon nanotubes by addition of diarylcarbene derivatives

Functionalisation of carbon nanotubes by carbene derivatives is attracting attention as a way of increasing their dispersibility, processability and also to control the electronic properties of carbon nanotubes. We have explored the functionalisation of a sample containing single- and double-walled carbon nanotubes with different diaryldiazomethane derivatives by using the high reactivity of the intermediate carbenes formed under actinic irradiation to insert to the carbon nanotube structure. Besides characterisation by bulk techniques (Raman, FTIR and TGA), we provide direct evidence on the location of the functional groups on the sidewalls of the carbon nanotubes by an electron microscopy study of a heavy-element tagged sample. The functionalised carbon nanotubes present higher dispersibilities than the purified samples and are prone to further derivatisation, with potential application in the areas of composite materials or molecular electronics. © 2011 The Royal Society of Chemistry

Sidewall functionalisation of carbon nanotubes by addition of diarylcarbene derivatives

Functionalisation of carbon nanotubes by carbene derivatives is attracting attention as a way of increasing their dispersibility, processability and also to control the electronic properties of carbon nanotubes. We have explored the functionalisation of a sample containing single- and double-walled carbon nanotubes with different diaryldiazomethane derivatives by using the high reactivity of the intermediate carbenes formed under actinic irradiation to insert to the carbon nanotube structure. Besides characterisation by bulk techniques (Raman, FTIR and TGA), we provide direct evidence on the location of the functional groups on the sidewalls of the carbon nanotubes by an electron microscopy study of a heavy-element tagged sample. The functionalised carbon nanotubes present higher dispersibilities than the purified samples and are prone to further derivatisation, with potential application in the areas of composite materials or molecular electronics. © 2011 The Royal Society of Chemistry.This research was supported in part by a Marie Curie European Reintegration Grant within the 7th European Community Framework Programme (PERG04-GA-2008- 239303) (G.T.), a Spanish Ministry of Science and Innovation contract (PTA2008-1108-I) (B.B.) and a Royal Thai Government Fellowship (P.L.).Peer Reviewe

Molecular dynamics study of cisplatin release from carbon nanotubes capped by magnetic nanoparticles

10.1021/jp405593uJournal of Physical Chemistry C1173317327-1733