A magnetically driven oscillating probe microscope for operation in liquids

Wenhai Han, Stuart Lindsay, Tianwei Jing

Research output: Contribution to journalArticle

369 Citations (Scopus)

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
StatePublished - Dec 23 1996

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microscopes
acoustic excitation
plasmids
probes
liquids
solenoids
mica
deoxyribonucleic acid
frequency ranges
curvature
atomic force microscopy
radii
fluids
detectors
water
excitation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

A magnetically driven oscillating probe microscope for operation in liquids. / Han, Wenhai; Lindsay, Stuart; Jing, Tianwei.

In: Applied Physics Letters, Vol. 69, No. 26, 23.12.1996, p. 4111-4113.

Research output: Contribution to journalArticle

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