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Optical properties of endohedral Li@C60
A. Gromov,N. Krawez,A. Lassesson,D. I. Ostrovskii,E. E. B. Campbell 한국물리학회 2002 Current Applied Physics Vol.2 No.1
UV-VIS, IR and Raman investigations have been carried out on puried Li@C60 produced by low energy ion implantation ofC60. Two endohedral fractions can be isolated that have very dierent optical properties and stabilities. Here we show that the rstendohedral fraction is a dimer species and the second fraction is the monomer. The IR spectra of sublimed monomer lms show aprominent peak at around 1.1l m corresponding to the rst electronic transition of the C.60 anion. Raman spectra show the vib-rationalrotational movement of the Li inside the carbon cage.. 2002 Elsevier Science B.V. All rights reserved.
Structure of palladium nanoclusters for hydrogen gas sensors
K.J. Stevens,B. Ingham,M.F. Toney,S.A. Brown,A. Lassesson 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
Palladium nanoclusters produced by inert gas aggregation/magnetron sputtering are used as building blocks for the construction ofnano electronic devices with large surface to volume ratios that can be used as sensitive hydrogen gas sensors in fuel cells and in petro-chemical plants. X-ray diraction (XRD), extended X-ray absorption ne structure (EXAFS), and high resolution transmission electronmicroscopy (HRTEM) have been used to characterise the structure, lattice constant, particle diameter and oxide thickness of the palla-dium nanoclusters in order to understand the operation of these sensors. Grazing incidence XRD (GIXRD) of heat treated Pd clustershas shown that the palladanite structure forms at elevated temperatures.