Infra-red reflectance and emissivity spectra of nanodiamonds

TL;DR

This study measures the infrared reflectance and emissivity spectra of nanodiamond powder at high temperatures, revealing sharp surface-bound functional group bands and high emissivity, with spectral changes upon thermal desorption.

Contribution

It provides detailed spectral data of nanodiamonds at elevated temperatures, highlighting surface chemistry effects on emissivity.

Findings

Maximal emissivity of nanodiamond powder reaches 0.985

Spectral bands due to surface-bound functional groups are identified

Thermal desorption causes notable spectral changes

Abstract

Reflectance and emissivity spectra of nanodiamonds powder were measured in a dedicated setup at temperatures up to 873 K. The spectra are characterised by presence of sharp bands due to surface-bound functional groups. Thermal desorption of oxygen-containing groups lead to corresponding spectral changes. The maximal emissivity of nanodiamond powder reaches 0.985.