Test environment running 7.6.6

Cultural advice

The Australian National University acknowledges, celebrates and pays our respects to the Ngunnawal and Ngambri people of the Canberra region and to all First Nations Australians on whose traditional lands we meet and work, and whose cultures are among the oldest continuing cultures in human history.

Aboriginal and Torres Strait Islander peoples are advised that ANU Library collections may include images, names, voices, and other representations of deceased persons.

Material in the collection may contain terms, language or views that reflect the period in which the item was created and may be considered inappropriate today.

EXAFS Characterisation of Ge Nanocrystals in Silica

Thumbnail Image

Date

2004

Authors

Ridgway, Mark C
Azevedo, G de M
Glover, Christopher
Elliman, Robert
Llewellyn, David
Cheung, Allen
Johannessen, Bernt
Brett, David Alisdair
Foran, Garry J

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Abstract

The formation and structure of Ge nanocrystals produced in silica by ion-implantation and thermal annealing were studied with transmission electron microscopy, Raman spectroscopy and extended X-ray absorption fine structure (EXAFS) spectroscopy. We compare results derived from these complementary techniques, focusing on the use of EXAFS to study the short-range order about Ge atoms. Utilizing this synchrotron-radiation-based analytical method, we show the nanocrystal inter-atomic distance distribution deviates from that of bulk Ge, exhibiting enhanced structural disorder of both Gaussian and non-Gaussian forms in the first, second and third nearest-neighbour shells. The extent of disorder in the nanocrystalline sample is comparable to that of relaxed amorphous material.

Description

Keywords

Keywords: Absorption spectroscopy; Annealing; Fluorescence; Germanium; Light scattering; Nanostructured materials; Raman spectroscopy; Silica; Synchrotron radiation; Thermooxidation; X ray spectroscopy; Interatomic distance; Semiconductor nanocrystals; X ray absorp

Citation

URI

http://hdl.handle.net/1885/88537

Collections

Open Access Research

Source

Nuclear Instruments and Methods in Physics Research: Section B

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1016/j.nimb.2004.01.004

Restricted until

DSpace software copyright © 2002-2026 LYRASIS