Perfect blackbody radiation from a graphene nanostructure with application to high-temperature spectral emissivity measurements

Abstract

We report the successful fabrication of a novel type of blackbody material based on a graphene nanostructure. We demonstrate that the graphene nanostructure not only shows a low reflectance comparable to that of a carbon nanotube array but also shows an extremely high heat resistance at temperatures greater than 2500 K. The graphene nanostructure, which has an emissivity higher than 0.99 over a wide range of wavelengths, behaves as a standard blackbody material; therefore, the radiation spectrum and the temperature can be precisely measured in a simple manner. Here, the spectral emissivities of tungsten and tantalum are experimentally obtained using this ideal blackbody material and are compared to previously reported spectra. We clearly demonstrate the existence of a temperature-independent fixed point of emissivity at a certain wavelength. Both the spectral emissivity as a function of temperature and the cross-over point in the emissivity spectrum are well described by the complex dielectric function based on the Lorentz-Drude model with the phonon-scattering effect.

Optical properties of thin graphitic nanopetal arrays

“…However, by using scratch techniques, growth of petals with some degree of alignment can be realized. Also, in recent experiment graphene nanoneedles with a certain degree of alignment were observed after anisotropic hydrogen plasma etching of the carbon substrate [23].…”

Theoretical studies of thermionic conversion of solar energy with graphene as emitter and collector

“…At this point, we need to consider the emissivity ε e . Matsumoto et al 54 reported the successful fabrication of a type of blackbody material based on a graphene nanostructure and found that the nanostructure exhibited blackbody radiation with emissivity of 0.99 over a wide range of wavelengths. Brar et al 53 studied electronic control of blackbody emission from graphene plasmonic resonators on a silicon nitride substrate and they have shown that graphene resonators produce antenna-coupled blackbody radiation, and manifest as narrow spectral emission peaks in the mid-IR.…”

“…(13)] would be lowest for ε e ¼ 1 (perfect blackbody) and would be maximum for the lowest value of ε e . In this paper, to study the effect of emissivity on efficiency η of solar TEC, we consider ε e ¼ 1 (perfect blackbody) 54,53 for the values of η in Table 1 and ε e ¼ 0.016 (gray-body emitter) 55,56 for the values of η in Table 2. Comparing the first two rows (Table 1), we see that the efficiency increased from 45.6% to 50% when the emissivity ε s decreased from 1 to 0.08.…”

Development of a spectral-spatial calibration source for a Far-Infrared interferometer

“…A good solution here that has been recently explored [10], is to employ graphene filaments as they provide both good emissivity, high temperature throughput and high repeatability [10], [11].…”