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Title: Stable and metastable nanowires displaying locally controllable properties

Abstract

Vapor-liquid-solid growth of nanowires is tailored to achieve complex one-dimensional material geometries using phase diagrams determined for nanoscale materials. Segmented one-dimensional nanowires having constant composition display locally variable electronic band structures that are determined by the diameter of the nanowires. The unique electrical and optical properties of the segmented nanowires are exploited to form electronic and optoelectronic devices. Using gold-germanium as a model system, in situ transmission electron microscopy establishes, for nanometer-sized Au--Ge alloy drops at the tips of Ge nanowires (NWs), the parts of the phase diagram that determine their temperature-dependent equilibrium composition. The nanoscale phase diagram is then used to determine the exchange of material between the NW and the drop. The phase diagram for the nanoscale drop deviates significantly from that of the bulk alloy.

Inventors:
;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1163986
Patent Number(s):
8,890,115
Application Number:
13/526,239
Assignee:
Brookhaven Science Associates, LLC (Upton, NY) CHO
DOE Contract Number:  
AC02-98CH10886
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE

Citation Formats

Sutter, Eli Anguelova, and Sutter, Peter Werner. Stable and metastable nanowires displaying locally controllable properties. United States: N. p., 2014. Web.
Sutter, Eli Anguelova, & Sutter, Peter Werner. Stable and metastable nanowires displaying locally controllable properties. United States.
Sutter, Eli Anguelova, and Sutter, Peter Werner. Tue . "Stable and metastable nanowires displaying locally controllable properties". United States. doi:. https://www.osti.gov/servlets/purl/1163986.
@article{osti_1163986,
title = {Stable and metastable nanowires displaying locally controllable properties},
author = {Sutter, Eli Anguelova and Sutter, Peter Werner},
abstractNote = {Vapor-liquid-solid growth of nanowires is tailored to achieve complex one-dimensional material geometries using phase diagrams determined for nanoscale materials. Segmented one-dimensional nanowires having constant composition display locally variable electronic band structures that are determined by the diameter of the nanowires. The unique electrical and optical properties of the segmented nanowires are exploited to form electronic and optoelectronic devices. Using gold-germanium as a model system, in situ transmission electron microscopy establishes, for nanometer-sized Au--Ge alloy drops at the tips of Ge nanowires (NWs), the parts of the phase diagram that determine their temperature-dependent equilibrium composition. The nanoscale phase diagram is then used to determine the exchange of material between the NW and the drop. The phase diagram for the nanoscale drop deviates significantly from that of the bulk alloy.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 18 00:00:00 EST 2014},
month = {Tue Nov 18 00:00:00 EST 2014}
}

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Works referenced in this record:

Phase structure of electrodeposited alloys
journal, August 2005


Formation of an intermediate phase in eutectic Au-Ge and Ag-Ge systems under high pressure
journal, June 1991


Metastable Metallic Alloys
journal, December 1999