Imaging snd Spectroscopy of Small Molecules by Scanning Tunneling Microscopy
Rept. for 1 Jun 1989-31 May 1990
CALIFORNIA INST OF TECH PASADENA DEPT OF CHEMISTRY
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Ultra-high vacuum UHV-scanning tunneling microscopy was used to image for the first time an individual double helix of deoxyribonucleic acid with atomic resolution1,2. In this study, DNA was deposited onto a highly oriented pyrolitic graphite HOPG surface without chemical modification and imaged with an STM to reveal structure down to the atomic-scale. The images represent the hightest magnification of a single molecule of DNA by any technique to date. The goal was to explore the effects of surface defects on the electronic structure of semiconductors. Keywords Microscopy, Optics, Semiconductors, Physical chemistry, Imaging adsorbates, Scanning Tunneling MicroscopySTM, Spectroscopy, Molecules, DNA.
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