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4 Sep 2000

Volume 77, Issue 10, pp. 1413-1560

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Influence of adsorbates on the surface conductivity of chemical vapor deposition diamond

M. Szameitat, X. Jiang, and W. Beyer

Appl. Phys. Lett. 77, 1554 (2000); http://dx.doi.org/10.1063/1.1290725 (3 pages) | Cited 20 times

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To investigate the mechanism of the diamond surface conductivity, temper experiments have been performed on chemical-vapor-deposited (CVD) diamond films under vacuum conditions. The surface conductivity of these films was measured as a function of temperature and in contact with different gas atmospheres. These results were compared with those obtained by gas evolution experiments performed on CVD diamond samples of the same kind, demonstrating the possible role of CO adsorption to the surface conductivity. © 2000 American Institute of Physics.
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73.61.Cw Elemental semiconductors
73.25.+i Surface conductivity and carrier phenomena
68.03.Fg Evaporation and condensation of liquids
68.43.Mn Adsorption kinetics

Imaging soft samples in liquid with tuning fork based shear force microscopy

W. H. J. Rensen, N. F. van Hulst, and S. B. Kämmer

Appl. Phys. Lett. 77, 1557 (2000); http://dx.doi.org/10.1063/1.1308058 (3 pages) | Cited 35 times

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We present a study of the dynamic behavior of tuning forks and the application of tuning fork based shear force microscopy on soft samples in liquid. A shift in resonance frequency and a recovery of the tip vibration amplitude have been observed upon immersion into liquid. Conservation of the vibration mode is confirmed by both direct stroboscopic observation and by detection of the tip vibration amplitude of the tuning fork. Thanks to the partial recovery of the Q factor upon complete immersion into liquid, it is possible to obtain high-resolution images on soft samples in liquid. This opens a new domain of applications for tuning fork based near-field scanning optical microscopes. © 2000 American Institute of Physics.
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07.79.Fc Near-field scanning optical microscopes
87.64.mt Near-field scanning
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