Infrared Reflectance and Emissivity Spectra of Nanodiamonds

ABSTRACT

Nanosized diamonds obtained by detonation of explosives are the subject of active studies in several scientific and technological fields. Besides their interesting peculiarities for solid-state physics studies, their presence in various circumstellar environments has been inferred from infrared (IR) spectra. Nanodiamonds are unique materials, allowing investigation of size-dependent properties of matter. We report measurements of IR properties of detonation nanodiamonds in reflectance at room temperature and in emissivity in a dedicated setup at temperatures up to 873 K. The spectra are characterized by the presence of sharp bands due to surface-bound functional groups. Thermal desorption of oxygen-containing groups leads to corresponding spectral changes. The maximal emissivity of nanodiamond powder reaches 0.985.

KEYWORDS:

• emittance
• functional groups
• granular leidenfrost effect
• nanodiamond
• reflectance

Notes

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