Segregation and Phase Dynamics in Supported Bimetallic Nanoparticles

The reaction between a silicon monolayer deposited on Pt(111) by chemical vapor deposition (CVD) using silane (SiH$\sb4)$ is described. Using Auger electron spectroscopy (AES), Si was found to readily diffuse into the Pt substrate and sequentially form at least two unique intermetallic Pt-Si surface structural phases with $(\surd7$ x $\surd7)R\pm19.1\sp\circ$ and $(\surd19$ x $\surd19)R\pm23.4\sp\circ$ real space unit cells as characterized by low energy electron diffraction (LEED). The reactive properties of each overlayer were studied, with respect to the clean Pt(111) surface, using CO as a chemisorption probe.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Chemistry

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Nashner, Michael Sydney

Contributors dc:contributor

• Nuzzo, Ralph G.

• Engineering, Materials Science

Language dc:language

eng

Identifier

(MiAaPQ)AAI9812718

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/84386