Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 4, Pages 1214-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja9091215
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- CLUSTER
- Ministry of Education, Culture, Sports, Science and Technology, Japan [19002007]
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Highly pure double-walled carbon nanotubes synthesized by a catalytic chemical vapor deposition method have a quasi one-dimensional nanopore system. We determined these nanotubes' nanopore structures by means of molecular probe adsorption using N-2 at 77 K, CO2 at 273 K, and water at 298, 308, and 318 K, as well as high-resolution transmission electron microscopy. The water vapor adsorption behavior of this system was quite unusual. At a lower relative pressure of P/P-0 = 0.3-0.65, water Filled the interstitial nanopores, and at relative pressures higher than this range, water also filled the interbundle nanopores. This Study is the first to our knowledge that has provided direct evidence of water adsorption in hydrophobic nanospaces of highly pure double-walled carbon nanotubes.
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