1 / 2

Quantum Tunneling Enabled H(D) Atom Diffusion at 5 K with STM

Quantum Tunneling Enabled H(D) Atom Diffusion at 5 K with STM. Hydrogen. Deuterium. Scale = (40 nm) 2. Fast motion. Slow motion. Sykes Group, Tufts University (October 2012) Explanation on following slide. Jewell et al ., ACS Nano ASAP DOI: 10.1021/nn3038463. EXPLANATION:

tasya
Download Presentation

Quantum Tunneling Enabled H(D) Atom Diffusion at 5 K with STM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Quantum Tunneling Enabled H(D) Atom Diffusion at 5 K with STM Hydrogen Deuterium Scale = (40 nm)2 Fast motion Slow motion Sykes Group, Tufts University (October 2012) Explanation on following slide. Jewell et al., ACS Nano ASAP DOI: 10.1021/nn3038463

  2. EXPLANATION: Scanning tunneling microscopy (STM) allows the structure of surfaces and adsorbed atoms/molecules to be studied with sub-nanometer resolution.  Hydrogen atoms on a copper surface appear as small dark spots that move around rapidly whereas deuterium atoms move slowly. This illustrates that hydrogen atom diffusion on surfaces at very low temperatures occurs not by thermally activated hopping but via Quantum Tunneling. This weakly bound hydrogen can perform efficient hydrogenation reactions.

More Related