Single-walled carbon nanotubes vibrational properties

G. Chiarello et al., Vibrational and electronic properties of hydrogen adsorbed on single-wall carbon nanotubes. Phys. Rev. B 69, 153409 (2004)... 

Figure 5.4 Raman spectra (Xf c= 1064 nm) of PPY/SWNT composites obtained by electropolymerization ofpyrrole on a SWNT film in HCI 0.5 M. Curve 1 corresponds to the SWNT film Raman spectrum. Curves 2-6 show the evolution of the Raman spectrum after 6, 2, 25, 50, and 100 cycles, respectively, carried out in the potential range (- -100 - -800) m V vs. SCE with a sweep rate of 100 mV s Curve 7 corresponds to the composites described by curve 6 after interaction with NH4OH 1 M solution. (Reprinted with permission from Diamond and Related Materials, Electrochemical and vibrational properties of single-walled carbon nanotubes in hydrochloric acid solutions by 5. Lefrant, M. Baibarac, I. Baltog et al., 14, 3-7, 873-880. Copyright (2005) Elsevier Ltd)...

Water in well-characterized pores is a system of general interest because it serves as model system for the non-bulk or inhomogeneous water that is ubiquitous in biological and geological systems, as well as in nano-sfructured materials. Often confined or interfacial water is highly relevant to the properties and functions of entire systems, e.g., those in ion channels and clay minerals. X-ray diffraction studies show that water can fill the inner space of open-ended single-walled carbon nanotubes (SWCNTs) under ambient conditions and freezes into crystalline solids. These are often referred to as ice nanotubes . Ice stmctures in confined systems are characterized as stacked n-membered rings or equivalently as a rolled square-net sheet. The formation of the ice nanotubes in CNTs has also been observed by NMR, neutron diffraction, and vibrational spectroscopy studies. 

Zaidi B, Bouzayen N, Wery J, Alimi K. Annealing treatment and carbon nanotubes concentration effects on the optical and vibrational properties of single walled carbon nanotubes functionalized with short oligo-n-vinyl carbazole. Mater Chem Phys 2011 126(l-2) 417-23. 

Gao, G. Cagin, T. Goddard, W.A., III. Energetics, structure, mechanical and vibrational properties of single-walled carbon nanotubes. Nanotechnology 1998, 9, 184-191. 

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