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696 Matching Results
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696
Superheating and supercooling of Ge nanocrystals embedded inSiO2
Free-standing nanocrystals exhibit a size-dependant thermodynamic melting point reduction relative to the bulk melting point that is governed by the surface free energy. The presence of an encapsulating matrix, however, alters the interface free energy of nanocrystals and their thermodynamic melting point can either increase or decrease relative to bulk. Furthermore, kinetic contributions can significantly alter the melting behaviors of embedded nanoscale materials. To study the effect of an encapsulating matrix on the melting behavior of nanocrystals, we performed in situ electron diffraction measurements on Ge nanocrystals embedded in a silicon dioxide matrix. Ge nanocrystals were formed by multi-energy ion implantation into a 500 nm thick silica thin film on a silicon substrate followed by thermal annealing at 900 C for 1 h. We present results demonstrating that Ge nanocrystals embedded in SiO{sub 2} exhibit a 470 K melting/solidification hysteresis that is approximately symmetric about the bulk melting point. This unique behavior, which is thought to be impossible for bulk materials, is well described using a classical thermodynamic model that predicts both kinetic supercooling and kinetic superheating. The presence of the silica matrix suppresses surface pre-melting of nanocrystals. Therefore, heterogeneous nucleation of both the liquid phase and the solid phase …
Date:
August 21, 2006
Creator:
Xu, Q.; Sharp, I. D.; Yuan, C. W.; Yi, D. O.; Liao, C. Y.; Glaeser, A. M. et al.
Object Type:
Article
System:
The UNT Digital Library
Israel: Background and Relations with the United States
This report explains the background of Israel and its relation to the United States. It reviews government and politics, foreign policy, the economy, and other current issues.
Date:
September 21, 2006
Creator:
Migdalovitz, Carol
Object Type:
Report
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 114, No. 210, Ed. 1 Saturday, October 21, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 21, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 114, No. 225, Ed. 1 Tuesday, November 21, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 114, No. 245, Ed. 1 Thursday, December 21, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 21, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
International Drug Trade and U.S. Foreign Policy
This report details the U.S. international narcotics policies and how these policies may affect foreign policy interests. It also discusses major foreign policy initiatives with Latin American and Middle Eastern countries, as well as the Bush Administration's anti-drug strategy.
Date:
July 21, 2006
Creator:
Perl, Raphael F.
Object Type:
Report
System:
The UNT Digital Library
India’s Nuclear Separation Plan: Issues and Views
None
Date:
November 21, 2006
Creator:
Squassoni, Sharon
Object Type:
Report
System:
The UNT Digital Library
Garber Billings News (Garber, Okla.), Vol. 106, No. 46, Ed. 1 Thursday, September 21, 2006
Weekly newspaper from Garber, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 21, 2006
Creator:
Hogan, Vickie Lee
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Garber Billings News (Garber, Okla.), Vol. 107, No. 8, Ed. 1 Thursday, December 21, 2006
Weekly newspaper from Garber, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 21, 2006
Creator:
Hogan, Vickie Lee
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 114, No. 79, Ed. 1 Friday, April 21, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 21, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 114, No. 121, Ed. 1 Wednesday, June 21, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 21, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 114, No. 142, Ed. 1 Friday, July 21, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 21, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 114, No. 189, Ed. 1 Thursday, September 21, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 21, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 113, No. 15, Ed. 1 Saturday, January 21, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 21, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 114, No. 36, Ed. 1 Tuesday, February 21, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 21, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 114, No. 56, Ed. 1 Tuesday, March 21, 2006
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 21, 2006
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mercedes Enterprise (Mercedes, Tex.), Vol. 94, No. 25, Ed. 1 Wednesday, June 21, 2006
Weekly newspaper from Mercedes, Texas that includes local, state, and national news along with advertising.
Date:
June 21, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Boerne Star & Recorder (Boerne, Tex.), Vol. 100, No. 58, Ed. 1 Friday, July 21, 2006
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
July 21, 2006
Creator:
Cartwright, Brian
Object Type:
Newspaper
System:
The Portal to Texas History
Boerne Star & Recorder (Boerne, Tex.), Vol. 100, No. 32, Ed. 1 Friday, April 21, 2006
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
April 21, 2006
Creator:
Cartwright, Brian
Object Type:
Newspaper
System:
The Portal to Texas History
Boerne Star & Recorder (Boerne, Tex.), Vol. 100, No. 93, Ed. 1 Tuesday, November 21, 2006
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
November 21, 2006
Creator:
Cartwright, Brian
Object Type:
Newspaper
System:
The Portal to Texas History
Boerne Star & Recorder (Boerne, Tex.), Vol. 100, No. 15, Ed. 1 Tuesday, February 21, 2006
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
February 21, 2006
Creator:
Cartwright, Brian
Object Type:
Newspaper
System:
The Portal to Texas History
Boerne Star & Recorder (Boerne, Tex.), Vol. 100, No. 23, Ed. 1 Tuesday, March 21, 2006
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
March 21, 2006
Creator:
Cartwright, Brian
Object Type:
Newspaper
System:
The Portal to Texas History
The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 111, No. 49, Ed. 1 Wednesday, June 21, 2006
Weekly newspaper from Goldthwaite, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 21, 2006
Creator:
Bridges, Steven W.
Object Type:
Newspaper
System:
The Portal to Texas History
Citizens' Advocate (Coppell, Tex.), Vol. 21, No. 16, Ed. 1 Friday, April 21, 2006
Weekly newspaper from Coppell, Texas that includes local, state, and national news along with advertising.
Date:
April 21, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History