Document Detail


Surface area measurement of functionalized single-walled carbon nanotubes.
MedLine Citation:
PMID:  17149898     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Single-walled carbon nanotubes have been functionalized and the specific surface areas of the functionalized nanotubes measured. Contrary to expectations, functionalization leads to a decrease in specific surface area compared to that of the unfunctionalized nanotubes. Treatment with a concentrated 1:1 nitric/sulfuric acid mixture followed by high-temperature baking at 1000 degrees C was found to increase the specific surface area of the nanotubes. For the unfunctionalized SWNTs, this treatment increases the specific surface area (SSA) by 20%. In the case of SWNTs functionalized by n-butyl groups the increase in the SSA was nearly 2-fold with the value increasing from 410 (drying at 110 degrees C) to 770 m2/gm (acid and bake treatment followed by drying at 110 degrees C). For the ozonized SWNTs, the SSA increases more than 3-fold from 381 (drying at 110 degrees C) to 1068 m2/gm (acid and bake treatment followed by drying at 110 degrees C). SEM images indicate that the nanotubes rebundle in the solid state with an average bundle size of 10-30 nm. AFM studies show that the ozonized tubes have been cut to short bundles after ozonolysis. Hydrogen uptake studies carried out on the baked ozonized tubes led to a 3 wt % hydrogen uptake at 77 K and 30 bar.
Authors:
Soma Chakraborty; Jayanta Chattopadhyay; Haiqing Peng; Zheyi Chen; Arnab Mukherjee; Rolf S Arvidson; Robert H Hauge; W E Billups
Related Documents :
2682138 - Physiologic hyperinsulinemia stimulates lactate extraction by heart muscle in the consc...
17136508 - Bio-available amino acids and mineral nitrogen forms in soil of moderately mown and aba...
16662228 - A malic acid permease in isolated vacuoles of a crassulacean acid metabolism plant.
87158 - On the mechanism of p-piperidyl and p-benzyl sulfamyl benzoic acids transport by renal ...
7316978 - The role of the hydroxy amino acid in the triplet sequence asn-xaa-thr(ser) for the n-g...
8471718 - Glycosphingolipid acyl chain orientational order in unsaturated phosphatidylcholine bil...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  110     ISSN:  1520-6106     ISO Abbreviation:  J Phys Chem B     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-12-07     Completed Date:  2007-03-13     Revised Date:  2007-03-23    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  United States    
Other Details:
Languages:  eng     Pagination:  24812-5     Citation Subset:  -    
Affiliation:
Department of Chemistry and The Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, Houston, Texas 77251, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Hydrogen molecule in the small dodecahedral cage of a clathrate hydrate: quantum five-dimensional ca...
Next Document:  Enhanced photoluminescence from very thin double-wall carbon nanotubes synthesized by the zeolite-CC...