A magnetically driven oscillating probe microscope for operation in liquids

Wenhai Han, Stuart Lindsay, Tianwei Jing

Research output: Contribution to journalArticle

371 Scopus citations

Abstract

Oscillating probe atomic force microscopy in fluids is simplified when an oscillating force is applied directly to a magnetized cantilever using a solenoid. The response of the detector is simpler than that obtained with acoustic excitation. Reliable operation over a broad frequency range is achieved with excitation amplitudes of a few nm. This lower amplitude appears to facilitate imaging by means of small asperities on the tip. Images of a DNA plasmid bound weakly to mica in water have a full width of 5 nm when scanned with tips of a nominal macroscopic radius of curvature of 50 nm.

Original languageEnglish (US)
Pages (from-to)4111-4113
Number of pages3
JournalApplied Physics Letters
Volume69
Issue number26
DOIs
StatePublished - Dec 23 1996

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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