Vertical inertial sliding drive for coarse and fine approaches in scanning probe microscopy

Review of Scientific Instruments - Tập 78 Số 3 - 2007
Adam Z. Stieg1, Paul Wilkinson1, James K. Gimzewski1
1University of California-Los Angeles Department of Chemistry and Biochemistry, , Los Angeles, California 90095

Tóm tắt

Mechanisms for controlled approach of a probe tip toward the sample surface are essential in high resolution imaging by scanning probe microscopy (SPM). This work describes the development and performance of an inertial sliding drive capable of translating a relatively large mass (25g) at up to 1mm∕s over 1cm with step sizes of 10–250nm in ambient conditions using various wave forms as measured by fiber optic interferometry. The drive functions independent of orientation with a threshold voltage of less than 15V using a single drive signal. Use of piezotube actuators in a radially symmetric arrangement provides guided motion and minimizes differential thermal expansion between critical components. Controlled translation of the entire scanning component in both ambient and electrochemical scanning tunneling microscopy has been routinely achieved with no evidence of tip crash. This device has been specifically designed for use in in situ SPM applications where stability of the sample and that of the liquid environment are paramount.

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Review of Scientific Instruments

Tập 78 Số 3

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