Electrostatic spraying of DNA molecules for investigation by scanning tunneling microscopy

T. Thundat, R. J. Warmack, D. P. Allison, T. L. Ferrell

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

We have investigated electrostatic spraying of DNA onto gold surfaces as an alternative sample-preparation technique for STM studies. Preliminary results show that a higher distribution of isolated strands as well as well ordered aggregates can be obtained with this technique when compared with electrodeposition or drop evaporation. In many places, the well ordered aggregates were found to cleave in a direction perpendicular to their length after repeated scanning in the same direction.

Original languageEnglish
Pages (from-to)1083-1087
Number of pages5
JournalUltramicroscopy
Volume42-44
Issue numberPART 2
DOIs
StatePublished - Jul 1992

Funding

We are grateful to K.B. Jacobson and L.A. Bottomleyfo r helpful discussionsT. his research was sponsoredb y the Director'sR esearcha nd DevelopmenFtu nd at ORNL and theO ffice of Health and Environmental ResearUcSh ,D epart-ment of Energy under contract DE-AC05-84OR21400w ith Martin Marietta Energy Systems,I nc.

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