Projects per year
Abstract
The tip of a scanning tunnelling microscope can inject hot electrons into a surface with atomic precision. Their subsequent dynamics and eventual decay can result in atomic manipulation of an adsorbed molecule, or in light emission from the surface. Here, we combine the results of these two near identical experimental techniques for the system of toluene molecules chemisorbed on the Si(111)−7 × 7 surface at room temperature. The radial dependence of molecular desorption away from the tip injection site conforms to a two-step ballistic-diffusive transport of the injected hot electrons across the surface, with a threshold bias voltage of +2.0 V. We find the same threshold voltage of +2.0 V for light emission from the bare Si(111)−7 × 7 surface. Comparing these results with previous published spectra we propose that both the manipulation (here, desorption or diffusion) and the light emission follow the same hot electron dynamics, only differing in the outcome of the final relaxation step which may result in either molecular displacement, or photon emission.
Original language | English |
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Article number | 095010 |
Journal | Journal of Physics Communications |
Volume | 3 |
Issue number | 9 |
DOIs | |
Publication status | Published - 17 Sept 2019 |
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Dive into the research topics of 'Common source of light emission and nonlocal molecular manipulation on the Si (111)-7x7 surface'. Together they form a unique fingerprint.Projects
- 1 Finished
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Breaking the Single Atom Limit in Atomic Manipulation
Sloan, P. (PI)
Engineering and Physical Sciences Research Council
1/11/12 → 30/10/14
Project: Research council
Profiles
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Kristina Rusimova
- Department of Physics - Lecturer
- Centre for Photonics and Photonic Materials - Prize Fellow
- Centre for Nanoscience and Nanotechnology - Prize Fellow
Person: Research & Teaching
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Peter Sloan
- Department of Physics - Senior Lecturer
- Centre for Nanoscience and Nanotechnology
- Condensed Matter Physics CDT
- The Bath Physics Observatory (BPO)
Person: Research & Teaching
Datasets
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Dataset for "Common source of light emission and nonlocal molecular manipulation on the Si(111)-7x7 surface"
Rusimova, K. (Creator), Sloan, P. (Creator), Purkiss, R. (Creator) & Etheridge, H. (Creator), University of Bath, 5 Sept 2019
DOI: 10.15125/BATH-00622
Dataset