Raman Spectroscopic Investigation of Gas Interactions with an Aligned Multiwalled Carbon Nanotube Membrane

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• 作者：Christopher Matranga ; Bradley Bockrath ; Nitin Chopra ; Bruce J. Hinds ; and Rodney Andrews
• 刊名：Langmuir
• 出版年：2006
• 出版时间：January 31, 2006
• 年：2006
• 卷：22
• 期：3
• 页码：1235 - 1240
• 全文大小：306K
• 年卷期：v.22,no.3(January 31, 2006)
• ISSN：1520-5827

文摘

Raman spectroscopy has been used to investigate ethane, propane, and SF₆ interactions with an aligned multiwalledcarbon nanotube (MWNT) membrane. Pressures of 7.5-9.3 atm and temperatures of 293-333 K were examined forpropane and SF₆, whereas slightly lower temperatures (263-293 K) and pressures (6.7-7.5 atm) were used for ethane.Red-shifting and broadening is seen for the C-C stretching vibrations of the two hydrocarbons, as well as for theA_1g symmetric vibration (₁) of SF₆. These spectral features indicate that the interaction between the gas and thenanotube membrane is capable of perturbing molecular vibrations and creating red-shifted features. Control experimentsdone on polycrystalline graphite and a polystyrene blank indicate that this spectral behavior is unique to gases interactingwith the nanotubes in the membrane.