Adsorption Dynamics of Alkanes on Single-Wall Carbon Nanotubes: A Molecular Beam Scattering Study

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• 作者：S. Funk ; U. Burghaus ; Brian White ; Stephen O'Brien ; Nicholas J. Turro
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：June 7, 2007
• 年：2007
• 卷：111
• 期：22
• 页码：8043 - 8049
• 全文大小：411K
• 年卷期：v.111,no.22(June 7, 2007)
• ISSN：1932-7455

文摘

The adsorption dynamics of n-/isobutane on "closed"-end (as-prepared, c-CNTs) and open-end (vacuum-annealed) carbon nanotubes (o-CNTs) have been studied by molecular beam scattering adsorption probabilitymeasurements. Thermal desorption spectroscopy (TDS) and scanning electron microscopy have been used tocharacterize the CNTs. Evident from TDS data, o-CNTs allow internal adsorption sites to be populated, whichis correlated with an increase in the initial adsorption probabilities as compared with c-CNTs, consistent withthe enhancement in the surface area by opening the tube ends. Furthermore, precursor-mediated adsorptiondynamics were observed.