Localized heating in nanoscale Pt constrictions measured using blackbody radiation emission
Daniel R. Ward, Naomi J. Halas, Douglas Natelson
TL;DR
This study uses thermal emission microscopy to measure and analyze localized heating in platinum nanowires during electromigration, revealing temperatures exceeding 1000 K and validating finite element models of thermal behavior.
Contribution
It provides direct optical measurements of nanoscale heating in Pt constrictions and compares these with detailed thermal simulations, advancing understanding of electromigration effects.
Findings
Pt nanowires reach temperatures over 1000 K
Blackbody spectra match finite element models
Heating exceeds decomposition thresholds for organic molecules
Abstract
Using thermal emission microscopy, we investigate heating in Pt nanowires before and during electromigration. The wires are observed to reach temperatures in excess of 1000 K. This is beyond the thermal decomposition threshold for many organic molecules of interest for single molecule measurements with electromigrated nanogaps. Blackbody spectra of the hot Pt wires are measured and found to agree well with finite element modeling simulations of the electrical and thermal transport.
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