Hydrocarbon radicals, methyl and methylene, are generated through hot nozzle sources and dosed onto Cu(111) at 300 K. High resolution electron energy loss spectroscopic measurements show that for the exposed sample, the radical not only can be chemisorbed on the surface but also can diffuse and react to form complex aromatic species at a monolayer coverage or less. The aromatic species exhibit characteristic vibrational bands at 1436, 1540 and 1613 . When the adlayer is annealed above 400 K, some species are desorbed while others are decomposed to form methylidyne. For impinging on Cu(111), some of the trapped radicals dehydrogenate to form Both H and are coadsorbed with on the surface. The results of the two radical-surface systems are compared and discussed.
Skip Nav Destination
Article navigation
May 1998
Papers from the 44th national symposium of the AVS
20-24 Oct 1997
San Jose, California (USA)
Research Article|
May 01 1998
Vibrational study of and radicals on the Cu(111) surface by high resolution electron energy loss spectroscopy
Y. L. Chan;
Y. L. Chan
Institute of Atomic and Molecular Sciences, Academia Sinica, P. O. Box 23-166, Taipei 10764, Taiwan
Search for other works by this author on:
Ping Chuang;
Ping Chuang
Department of Chemistry, National Taiwan University, Taipei 10764, Taiwan
Search for other works by this author on:
T. J. Chuang
T. J. Chuang
Institute of Atomic and Molecular Sciences, Academia Sinica, P. O. Box 23-166, Taipei 10764, Taiwan
Department of Chemistry, National Central University, Chung-Li 32054, Taiwan
Search for other works by this author on:
J. Vac. Sci. Technol. A 16, 1023–1030 (1998)
Article history
Received:
October 13 1997
Accepted:
March 02 1998
Citation
Y. L. Chan, Ping Chuang, T. J. Chuang; Vibrational study of and radicals on the Cu(111) surface by high resolution electron energy loss spectroscopy. J. Vac. Sci. Technol. A 1 May 1998; 16 (3): 1023–1030. https://doi.org/10.1116/1.581226
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00