@article {RN60,
	title = {Deuterium NMR investigation of the biaxial nematic phase in an organosiloxane tetrapode},
	journal = {Phys Rev Lett},
	volume = {94},
	number = {10},
	year = {2005},
	note = {n/a},
	pages = {107802},
	type = {Journal Article},
	abstract = {<p>Deuterium NMR is used to examine the molecular order exhibited by an organosiloxane tetrapode giving the first experimental evidence, using a bulk sample, for the existence of a biaxial nematic phase in this type of compounds. The temperature dependence of the averaged quadrupolar coupling constant and asymmetry parameter was determined in the compound{\textquoteright}s nematic phase. Two distinct regimes could be identified, one with a vanishing asymmetry parameter corresponding to a uniaxial nematic phase and another with a significant temperature dependent asymmetry parameter, corresponding to a biaxial nematic phase. The high values obtained for the asymmetry parameter at the lower end of the nematic range are well above experimental error and constitute a definite proof of the biaxial nature of the nematic phase exhibited by the studied compound for those temperatures.</p>
},
	issn = {0031-9007 (Print) 0031-9007 (Linking)},
	doi = {10.1103/PhysRevLett.94.107802},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/15783524},
	author = {J. L. Figueirinhas and C. Cruz and Filip, D. and Feio, G. and Ribeiro, A. C. and Frere, Y. and Meyer, T. and Mehl, G. H.}
}
