Transparent metal films for detection of single-molecule optical absorption by scanning tunneling microscopy

Lea Nienhaus, Gregory E. Scott, Richard T. Haasch, Sarah Wieghold, Joseph W. Lyding, Martin Gruebele

Research output: Contribution to journalArticle

Abstract

Atomically flat, conductive, and transparent noble metal films are produced to extend the wavelength range of room-temperature single-molecule optical absorption detected by scanning tunneling microscopy (SMA-STM). Gold films grown on a platinum underlayer to 15 nm total thickness, deposited by electron beam evaporation onto c-plane sapphire substrates, show sufficient light transmission for backside illumination for laser-assisted STM experiments. Low resistance, transparency, and the atomically flat island surfaces make these good substrates for SMA-STM studies. Monte Carlo lattice kinetics were simulated to allow for a better understanding of the growth modes of the Pt-Au films and of the achieved morphologies. SMA-STM is detected for a quantum dot deposited by aerosol spraying onto Pt-Au films, demonstrating the suitability of such films for single-molecule absorption spectroscopy studies.

Original languageEnglish (US)
Pages (from-to)13196-13202
Number of pages7
JournalJournal of Physical Chemistry C
Volume118
Issue number24
DOIs
StatePublished - Jun 19 2014

Fingerprint

Scanning tunneling microscopy
metal films
Light absorption
scanning tunneling microscopy
optical absorption
Metals
Molecules
molecules
light transmission
spraying
low resistance
noble metals
Aluminum Oxide
Substrates
Spraying
aerosols
Light transmission
Precious metals
absorption spectroscopy
sapphire

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Transparent metal films for detection of single-molecule optical absorption by scanning tunneling microscopy. / Nienhaus, Lea; Scott, Gregory E.; Haasch, Richard T.; Wieghold, Sarah; Lyding, Joseph W.; Gruebele, Martin.

In: Journal of Physical Chemistry C, Vol. 118, No. 24, 19.06.2014, p. 13196-13202.

Research output: Contribution to journalArticle

Nienhaus, Lea ; Scott, Gregory E. ; Haasch, Richard T. ; Wieghold, Sarah ; Lyding, Joseph W. ; Gruebele, Martin. / Transparent metal films for detection of single-molecule optical absorption by scanning tunneling microscopy. In: Journal of Physical Chemistry C. 2014 ; Vol. 118, No. 24. pp. 13196-13202.
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