Ultraviolet and electron radiation induced fragmentation of adsorbed ferrocene

Authors

Dulip Welipitiya, University of Nebraska-Lincoln
A. Green, University of Nebraska-Lincoln
J.P. Woods, University of Nebraska-Lincoln
Peter A. Dowben, University of Nebraska-LincolnFollow
Brian W. Robertson, University of Nebraska-LincolnFollow
Dongjin Byun, University of Nebraska-Lincoln
Jiandi Zhang, Oak Ridge National LaboratoryFollow

Date of this Version

2-22-1996

Comments

Published J. Appl. Phys. 79 (1996) 8730-8734. Permission to use.

Abstract

From thermal desorption spectroscopy we find that ferrocene, Fe(C₅H₅)₂, adsorbs and desorbs associatively on Ag(100). Photoemission results indicate that the initially adsorbed surface species closely resembles that of molecular ferrocene. The shift in photoemission binding energies relative to the gas phase is largely independent of the molecular orbital. We find that ultraviolet light does lead to partial fragmentation of the ferrocene and that the molecular fragments are much more strongly bound to the surface than the associatively adsorbed ferrocene. Since fragmentation occurs only in the presence of incident radiation, selective area deposition from this class of molecules is possible. Using a focused electron beam in a scanning transmission electron microscope, we show that selective area deposition of features with resolution of a few hundred angstroms is readily achieved. ©1996 American Institute of Physics.