Accession Number:

ADA551658

Title:

Thermal Transport in 1-D and 2-D Nanostructures

Descriptive Note:

Final rept.

Corporate Author:

TATA INST OF FUNDAMENTAL RESEARCH BOMBAY (INDIA)

Personal Author(s):

• Deshmukh, Mandar M.

Report Date:

2011-11-08

Pagination or Media Count:

6.0

Abstract:

We have measured the thermal conductivity of individual nanowires with engineered defects. The key emphasis is on studying how the phonon spectrum can be modified using defect engineering in 1D and 2D systems. Our work with nanowires suggests that strong localization of phonons is possible due to twin defects oriented perpendicular to the axis of nanowires. This results in the reduction of measured thermal conductivity by three orders of magnitude. As a result of the significant reduction in thermal conductivity the phonon contribution to thermal conductivity becomes comparable to the electronic contribution. A significant fraction of the electronic contribution to thermal conductivity can be tuned by an electrostatic gate - a realization of a thermal field effect transistor and analogue of the electrical FET.

Descriptors:

• *NANOWIRES
• *THERMAL CONDUCTIVITY
• NANOMATERIALS
• ONE DIMENSIONAL
• PHONONS
• TWO DIMENSIONAL

Subject Categories:

• Electrical and Electronic Equipment
• Solid State Physics
• Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE