Reference : Effect of phenyl rings in liquid crystal molecules on swcnts studied by raman spectroscopy
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/10993/20547
Effect of phenyl rings in liquid crystal molecules on swcnts studied by raman spectroscopy
English
Scalia, G. [> >]
Lagerwall, Jan mailto [Universität Stuttgart]
Haluska, Miroslav [> >]
Dettlaff-Weglikowska, Ursula [> >]
Giesselmann, Frank [> >]
Roth, Siegmar [> >]
2006
Physica Status Solidi B. Basic Research
Wiley
243
13
3238-3241
Yes (verified by ORBilu)
International
0370-1972
1521-3951
Berlin
Germany
[en] Nanotubes ; liquid crystal ; thermotropic
[en] Carbon nanotubes can be aligned by dispersing them in a liquid crystalline matrix. To control and opti- mize the obtained alignment it is important to understand the interactions between the molecules of the liquid crystal host phase and the carbon nanotubes. To this end we have carried out resonant Raman spec- troscopy investigations of dispersions of single-wall carbon nanotubes (SWCNTs) in a liquid crystal com- pound comprising molecules with a biphenyl rigid core structure. We detect a distinct wavenumber shift of the radial breathing modes, confirming that the carbon nanotubes interact with the surrounding liquid crystal molecules, most likely through aromatic interactions (π-stacking). The interactions between liquid crystal host and nanotube guests are also evident from a polarizing microscopy study of the liquid crys- tal – isotropic phase transition in the proximity of bundles of nanotubes. The ordered liquid crystal phase is stable up to higher temperatures around the bundles than in areas without visible signs of CNTs. Con- versely, the transition from the disordered isotropic phase to the liquid crystal phase on cooling always nucleates at the carbon nanotube bundles.
Researchers ; Professionals
http://hdl.handle.net/10993/20547
10.1002/pssb.200669205

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Limited access
Scalia et al 2006.pdfPublisher postprint1.41 MBRequest a copy

Bookmark and Share SFX Query

All documents in ORBilu are protected by a user license.