Thermal Properties of Indium Nanoparticles and Gold Silicide Formation by Scanning Nanocalorimetry

Zhang, Ming

Permalink

https://hdl.handle.net/2142/82747 Copy

Description

Title

Thermal Properties of Indium Nanoparticles and Gold Silicide Formation by Scanning Nanocalorimetry

Author(s)

Zhang, Ming

Issue Date

2003

Doctoral Committee Chair(s)

Allen, Leslie H.

Department of Study

Materials Science and Engineering

Discipline

Materials Science and Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

Engineering, Materials Science

Language

eng

Abstract

The silicide study focuses on phase formation in Au-Si thin films. The unique finding is to determine the melting temperature of metastable phase using calorimetry, which is ∼60°C below the eutectic melting point (363°C). The heat of fusion (26.4 kJ/mol) of the metastable phase has also been obtained. The metastable phase is analyzed to be an orthorhombic structure (a = 0.92, b = 0.72, c = 1.35 nm) by double tilting experiment with stereographic projection method (ex-situ TEM). The composition is proposed to be Au3Si from EDAX. The real-time experiment shows the melting point depression of eutectic and competitive growth between eutectic and Au3Si phase. The composition of the film (i.e., gold-rich or silicon-rich) determines the formed phase. Rapid cooling experiments reveal that eutectic is supercooled down to much lower temperatures (∼135°C) than the Au3Si phase (∼275°C).

Graduation Semester

2003

Type of Resource

text

Permalink

http://hdl.handle.net/2142/82747

Owning Collections