@article {Huang:January 2004:0022-2291:263,
	author = "Huang P.",
	author = "Whitley H.D.",
	author = "Whaley K.B.",
	title = "Structure and Energetics of Helium Adsorption on Nanosurfaces: Proceedings of the Symposium on Quantum Fluids and Solids, QFS2003",
	journal = "Journal of Low Temperature Physics",
	volume = "134",
	year = "January 2004",
	abstract = "The ground and excited state properties of small helium clusters, <SUP>4</SUP>He<SUB><I>N</I></SUB>, containing nanoscale (<IMG SRC="/iso-ents/isotech/sim.gif" ALT="sim">3&#150;10 &Aring;) planar aromatic molecules have been studied with quantum Monte Carlo methods. Ground state structures and energies are obtained from importance-sampled, rigid-body diffusion Monte Carlo. Excited state energies due to helium vibrational motion are evaluated using the projection operator, imaginary time spectral evolution technique. We examine the adsorption of <I>N</I> helium atoms (<I>N</I><IMG SRC="/iso-ents/isotech/le.gif" ALT="le">24) on a series of planar aromatic molecules (benzene, naphthalene, anthracene, tetracene, phthalocyanine). The first layer of helium atoms is well-localized on the molecule surface, and we find well-defined localized excitations due to in-plane vibrational motion of helium on the molecule surface. We discuss the implications of these confined excitations for the molecule spectroscopy.",
	pages = "263-268(6)",
	url = "http://www.ingentaconnect.com/content/klu/jolt/2004/00000134/F0020001/00479876"
	doi = "doi:10.1023/B:JOLT.0000012565.54363.64"
}