Multiwalled carbon nanotubes are ballistic conductors at room temperature

2002 ◽  
Vol 74 (3) ◽  
pp. 363-365 ◽  
Author(s):  
C. Berger ◽  
Y. Yi ◽  
Z.L. Wang ◽  
W.A. de Heer
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Room Temperature ◽  
Multiwalled Carbon

Room-temperature, selective detection of benzene at trace levels using plasma-treated metal-decorated multiwalled carbon nanotubes

Carbon ◽  
2010 ◽  
Vol 48 (12) ◽  
pp. 3477-3484 ◽  
Author(s):  
Radouane Leghrib ◽  
Alexandre Felten ◽  
Fréderic Demoisson ◽  
François Reniers ◽  
Jean-Jacques Pireaux ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Room Temperature ◽  
Selective Detection ◽  
Multiwalled Carbon

scholarly journals Pt- and Pd-decorated MWCNTs for vapour and gas detection at room temperature

2015 ◽  
Vol 6 ◽  
pp. 919-927 ◽  
Author(s):  
Hamdi Baccar ◽  
Atef Thamri ◽  
Pierrick Clément ◽  
Eduard Llobet ◽  
Adnane Abdelghani
Keyword(s):  
Carbon Nanotubes ◽  
Volatile Organic Compounds ◽  
Multiwalled Carbon Nanotubes ◽  
Organic Compounds ◽  
Room Temperature ◽  
Surface Defects ◽  
Pd Nanoparticles ◽  
Oxygen Plasma Treatment ◽  
Multiwalled Carbon ◽  
Volatile Organic

Here we report on the gas sensing properties of multiwalled carbon nanotubes decorated with sputtered Pt or Pd nanoparticles. Sputtering allows for an oxygen plasma treatment that removes amorphous carbon from the surface of the carbon nanotubes and creates oxygenated surface defects in which metal nanoparticles nucleate within a few minutes. The decoration with the 2 nm Pt or the 3 nm Pd nanoparticles is very homogeneous. This procedure is performed at the device level (i.e., for carbon nanotubes deposited onto sensor substrates) for many devices in one batch, which illustrates the scalability for the mass production of affordable nanosensors. The response to selected aromatic and non-aromatic volatile organic compounds, as well as pollutant gases has been studied. Pt- and Pd-decorated multiwalled carbon nanotubes show a fully reversible response to the non-aromatic volatile organic compounds tested when operated at room temperature. In contrast, these nanomaterials were not responsive to the aromatic compounds studied (measured at concentrations up to 50 ppm). Therefore, these sensors could be useful in a small, battery-operated alarm detector, for example, which is able to discriminate aromatic from non-aromatic volatile organic compounds in ambient.

Excellent ambipolar gas sensing response of Eu[Pc(OC4H9)8]2/acidified multiwalled carbon nanotubes hybrid at room temperature

2019 ◽  
Vol 23 (11n12) ◽  
pp. 1455-1462 ◽  
Author(s):  
Kiran Abdullah ◽  
Xia Kong ◽  
Muhammad Imran ◽  
Ghulam Mustafa ◽  
Yanli Chen
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Hybrid Material ◽  
Room Temperature ◽  
Gas Sensing ◽  
Multiwalled Carbon ◽  
Text Type ◽  
Double Decker ◽  
Sandwich Type ◽  
The Eu

A new hybrid material has been developed by mixing a sandwich-type double-decker, Eu[Pc(OC4H9)8]2 = 2,3,9,10,16,17,23,24-octabutoxyphthalocyaninate] with acidified multiwalled carbon nanotubes (aMWCNTs) through non-covalent interactions. The UV-vis spectrum, X-ray diffraction and scanning electron microscope have been employed to reveal the [Formula: see text]-aggregate mode and optimized morphology of Eu[Pc(OC4H9)8]2 molecules in the Eu[Pc(OC4H9)8]2/aMWCNTs hybrid material. The gas-sensing devices based on this hybrid material are fabricated by a simple solvent-processing quasi-Langmuir–Shäfer (QLS) progress. The [Formula: see text]-type and [Formula: see text]-type response is shown by the Eu[Pc(OC4H9)8]2/aMWCNTs hybrid film at room temperature. The detection limit of the hybrid for ammonia and nitrogen dioxide gas is 0.5 ppm and 0.3 ppm, respectively.

Sign in / Sign up

Export Citation Format

Share Document