Memory complaints in epilepsy: correlations with cognitive performance and neuroticism |
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Authors: | J Vermeulen AP Aldenkamp WC Alpherts |
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Affiliation: | Department of Physiology, University of Virginia, Charlottesville 22908. |
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Abstract: | Experimental results are presented to show that the adhesion force is the single most important limiting factor in high-resolution atomic force microscopy of DNA in air, prepared by the cytochrome-C-assisted spreading method. It is also shown that humidity plays a minor role in the control of probe force. Using a pure carbon film as the substrate to clean the AFM tip prior to imaging, it is demonstrated that 4-6 nm resolution on DNA can be routinely obtained by the atomic force microscope with commercial Si3N4 pyramid cantilevers. We also show that in organic solvents a resolution of up to 3 nm can be obtained under optimal conditions. |
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