scholarly journals Adsorption of Molecular Gases on Silver/Carbon Nanotube Composites at Low Temperatures and Low Pressures

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
M. Barberio ◽  
P. Barone ◽  
F. Stranges ◽  
R. A. Romano ◽  
F. Xu ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Temperature Programmed Desorption ◽  
Desorption Kinetics ◽  
Multiwalled Carbon ◽  
Molecular Gases ◽  
First Order ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
Temperature Programmed ◽  
Low Pressures

We present an experimental study adsorption of molecular gases (N2, H2, O2, CH4, C2H4, and C2H6) on multiwalled carbon nanotubes (MWCNTs) and MWCNT doped with Ag at low temperatures (35 K) and pressures (10−6 Torr) using the temperature programmed desorption technique. Our results show that the desorption kinetics is of the first order; furthermore comparative measurements indicate that Ag/MWCNTs have an adsorption capacity higher than that of a pure sample suggesting that these composites are good candidates as gas cryosorbers for applications in cryopumps or sensor of latest generation.

Competitive Pairing and the Chemistry of Coadsorbed Hydrogen and Halogens on Ge(100)

1992 ◽  
Vol 282 ◽  
Author(s):  
Yuemei L. Yang ◽  
Stephen M. Cohen ◽  
Mark P. D'Evelyn
Keyword(s):  
Epitaxial Growth ◽  
Atomic Layer ◽  
Temperature Programmed Desorption ◽  
Model System ◽  
Atomic Layer Epitaxy ◽  
Desorption Kinetics ◽  
First Order ◽  
First Order Kinetics ◽  
Temperature Programmed ◽  
Kinetics Of

ABSTRACTThe chemistry of coadsorbed H and X (X=C1, Br) on semiconductor surfaces is important in epitaxial growth of silicon from chlorosilanes and of SixGe1−x alloys, in hydrogenating/ halogenating cycles in atomic layer epitaxy, and also provides an interesting model system, yet has received little attention to date. We have investigated the interaction of HC1 and HBr with Ge(100) by temperature-programmed desorption, and find that H2, HCl and HBr each desorb with near-first-order kinetics near 570–590 K and that GeCl2 and GeBr2 desorb with near-second-order kinetics near 675 K and 710 K, respectively. Analysis of the desorption kinetics of H2 and HX provides evidence that adsorbed H and X atoms pair preferentially in a qualitatively similar way as H atoms adsorbed alone on Ge(100)2×1 or Si(100)2×1 and that pairing of H+X occurs in competition with pairing of H+H.

Fast Preparation of Hydroxyapatite/Superhydrophilic Vertically Aligned Multiwalled Carbon Nanotube Composites for Bioactive Application

Langmuir ◽  
2010 ◽  
Vol 26 (23) ◽  
pp. 18308-18314 ◽  
Author(s):  
Anderson O. Lobo ◽  
Marcus A. F. Corat ◽  
Sandra C. Ramos ◽  
Jorge T. Matsushima ◽  
Alessandro E. C. Granato ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Nanotube Composites ◽  
Vertically Aligned ◽  
Carbon Nanotube Composites

Neuron-like polyelectrolyte–carbon nanotube composites for ultra-high loading of metal nanoparticles

2014 ◽  
Vol 38 (10) ◽  
pp. 4799-4806 ◽  
Author(s):  
Md. Shahinul Islam ◽  
Won San Choi ◽  
Tae Sung Bae ◽  
Young Boo Lee ◽  
Ha-Jin Lee
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Metal Nanoparticles ◽  
Multiwalled Carbon Nanotubes ◽  
High Loading ◽  
Multiwalled Carbon ◽  
Simple Protocol ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

We report a simple protocol for the fabrication of multiwalled carbon nanotubes (MWCNTs) with a neuron-like structure for loading ultra-high densities of metal nanoparticles (NPs).

Photoisomerization of electroactive polyimide/multiwalled carbon nanotube composites on the effect of electrochemical sensing for ascorbic acid

2014 ◽  
Vol 64 (3) ◽  
pp. 373-382 ◽  
Author(s):  
Kung-Chin Chang ◽  
Chien-Ming Chu ◽  
Chi-Hao Chang ◽  
Hsiao-Tung Cheng ◽  
Sheng-Chieh Hsu ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotube ◽  
Electrochemical Sensing ◽  
Multiwalled Carbon ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

Adsorption Behavior of Co(II) and Eu(III) on Polyacrylamide/Multiwalled Carbon Nanotube Composites

2019 ◽  
Vol 61 (3) ◽  
pp. 323-330 ◽  
Author(s):  
F. H. El-Sweify ◽  
I. M. Abdelmonem ◽  
A. M. El-Masry ◽  
T. E. Siyam ◽  
S. F. Abo-Zahra
Keyword(s):  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotube ◽  
Adsorption Behavior ◽  
Multiwalled Carbon ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites
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