Imaging porphyrin-based molecules on a gold substrate in ambient conditions

D. K. Luttrull, J. Graham, Thomas Moore, D. Gust, T. A. Moore, Stuart Lindsay

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Covalently tethering porphyrin-based molecules to an otherwise inert gold substrate allows them to be imaged in an ambient environment using scanning tunneling microscopy. Interpretation of the data is aided by comparing images of mono- and diporphyrin molecules taken with the same tip. At low coverage we obtain a markedly larger average particle size (396 A2) for diporphyrins than for monoporphyrins (121 A2). The particle size distributions are very broad, but the images show a characteristic variation of contrast with tip bias, suggesting that the heterogeneity is due to different molecular conformations rather than contamination. We find evidence of ordered structures at high coverage.

Original languageEnglish (US)
Pages (from-to)765-768
Number of pages4
JournalLangmuir
Volume8
Issue number3
StatePublished - Mar 1992

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Porphyrins
porphyrins
Gold
tethering
gold
Imaging techniques
Molecules
Scanning tunneling microscopy
Substrates
particle size distribution
Particle size analysis
Conformations
scanning tunneling microscopy
molecules
contamination
Contamination
Particle size

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Luttrull, D. K., Graham, J., Moore, T., Gust, D., Moore, T. A., & Lindsay, S. (1992). Imaging porphyrin-based molecules on a gold substrate in ambient conditions. Langmuir, 8(3), 765-768.

Imaging porphyrin-based molecules on a gold substrate in ambient conditions. / Luttrull, D. K.; Graham, J.; Moore, Thomas; Gust, D.; Moore, T. A.; Lindsay, Stuart.

In: Langmuir, Vol. 8, No. 3, 03.1992, p. 765-768.

Research output: Contribution to journalArticle

Luttrull, DK, Graham, J, Moore, T, Gust, D, Moore, TA & Lindsay, S 1992, 'Imaging porphyrin-based molecules on a gold substrate in ambient conditions', Langmuir, vol. 8, no. 3, pp. 765-768.
Luttrull, D. K. ; Graham, J. ; Moore, Thomas ; Gust, D. ; Moore, T. A. ; Lindsay, Stuart. / Imaging porphyrin-based molecules on a gold substrate in ambient conditions. In: Langmuir. 1992 ; Vol. 8, No. 3. pp. 765-768.
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