The nanometre limits of ballistic and diffusive hot-hole mediated nonlocal molecular manipulation

Research output: Contribution to journalArticle

Abstract

We report an experimental investigation into the surface-specific and experimental limits of the range of STM induced nonlocal molecular manipulation. We measure the spot-size of the nonlocal manipulation of bromobenzene molecules on the Si(111)-7 × 7 surface at room temperature at two voltages and for a wide range of charge-injection times (number of hot charge-carriers) from 1 s up to 500 s. The results conform to an initially ballistic, 6-10 nm, and then hot-hole diffusive, 10-30 nm, transport away from the localised injection site. This work gives further confirmation that nonlocal molecular manipulation by STM directly reveals the ultrafast transport properties of hot-charge carriers at surfaces.

Original languageEnglish
Article number105401
JournalNanotechnology
Volume31
Issue number10
Early online date17 Dec 2019
DOIs
Publication statusPublished - 6 Mar 2020

Keywords

  • ballistic transport
  • diffusive transport
  • hot electron
  • molecular manipulation
  • STM

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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