Stable and metastable nanowires displaying locally controllable properties

Sutter, Eli Anguelova; Sutter, Peter Werner

Stable and metastable nanowires displaying locally controllable properties

Patent · Tue Nov 18 04:00:00 EST 2014

OSTI ID:1163986

Sutter, Eli Anguelova; Sutter, Peter Werner

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.

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC02-98CH10886

Assignee:: Brookhaven Science Associates, LLC (Upton, NY)

Patent Number(s):: 8,890,115

Application Number:: 13/526,239

OSTI ID:: 1163986

Country of Publication:: United States

Language:: English

References (10)

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