Thermal Emission Spectroscopy for Single Nanoparticle Temperature Measurement: Optical System Design and Calibration

TL;DR

This paper presents an optical system for measuring the thermal emission spectra of single nanoparticles, including calibration techniques for low emission intensities, enabling precise temperature analysis of laser-heated nanoparticles.

Contribution

It introduces a novel optical system design and calibration method for accurate spectral measurement of individual nanoparticles in controlled atmospheres.

Findings

Successful measurement of emission spectra from 600 nm to 1650 nm

Calibration approach for low emission intensities demonstrated

Spectra of graphite and carbon black nanoparticles analyzed

Abstract

We discuss the design of an optical system that allows measurement of 600 nm to 1650 nm emission spectra for individual nanoparticles (NPs), laser heated in an electrodynamic trap in controlled atmospheres. An approach to calibration of absolute intensity vs. wavelength for very low emission intensities is discussed, and examples of NP graphite and carbon black spectra are used to illustrate the methodology.