Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session F12: Electronic Structure: Thermodynamic and Optical Properties
8:00 AM–10:48 AM,
Tuesday, March 15, 2022
Room: McCormick Place W-181C
Chair: Lei Kerr, FIAP
Abstract: F12.00007 : Thermal Expansion Coefficient of Silicon Nanoparticles with Nanometer Resolution*
9:12 AM–9:24 AM
Presenter:
Bibash Sapkota
(University of Illinois at Chicago)
Authors:
Bibash Sapkota
(University of Illinois at Chicago)
Serdar Ogut
(University of Illinois at Chicago)
Robert F Klie
(University of Illinois at Chicago)
Here, we utilize a novel approach of non-contact thermometry based on the combination of low-loss electron energy-loss spectroscopy (EELS) with first principles density functional theory (DFT) modeling to measure the TEC of materials with nm resolution. The approach has previously been tested on 2D materials, such as transition metal dichalcogenides (TMDs), graphene and MoS2 by Hu et al. In present work, we will extend the approach to Si nanoparticles to determine its TEC as a function of temperature. We will also explore pitfalls as well as the limits of measuring the local temperature using this approach.
*This work was supported by the National Science Foundation (DMR-18314061).
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