CuSe g

In Ref. 54, XRD showed the deposit to be hexagonal CuSe. Analysis of the absorption spectrum gave a direct bandgap of 2.02 eV. As commonly seen for these compounds, there was still strong absorption at lower energies (e.g., at 1.9 eV, the absorption coefficient was >7 X 10" cm ), possibly due to an indirect transition but likely due, at least in part, to free-carrier absorption. From Hall measurements, the doping (acceptor) density was ca. 10 cm (heavily degenerate) and the mobility ca. 1 cm V sec The dependence of film thickness and deposition rate on the deposition parameters has been studied in a separate paper [62]. 

Verdier-Pinard, R Wang, F. Martello, L. Burd, B. Orr, G. A. Horwitz, S. B. Analysis of tubulin isotypes and mutations from taxol-resistant cells by combined isoelectrofo-cusing and mass spectroscopy. Biochemistry, 2002, 42 5349-5357. 

Macroscopically, the direct effect of molecular forces can be observed in a layer of dust on surfaces. Small, light particles that settle on, for example, furniture are held to the substrate and to each other by the always present molecular forces and removal requires wiping (e.g. with a dust cloth) or suction (e.g. with a vacuum cleaner). Microscopic natural adherance of submicron particles due to molecular forces will be dis-cused in Sections 10.2.1 and 10.2.2. 

This model appeared to be adequate to explane the electrode lower limit of the Nern-stian response of the electrode in Cu(II) buffer and non-buffer solutions as well as of some anomalous behaviours of the electrodes. " It did not, however, give an exact answer to the question what are the great differences in the behaviour of the Cu2-xSe electrochemical thin membrane we proposed and the Cui g Se monocrystal one. It was not clear enough how the new CuSe phase, formed as the result of reaction (1), was attached onto the electrode surface. In order to give answers to the questions presented above, an electrochemical study was started to investigate the interrelation betveen the chemical and phase composition of the membrane, and the electrode function for Cu(II). 

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