No CrossRef data available.
Published online by Cambridge University Press: 23 September 2016
We discuss the optical properties of carbonaceous materials from the VUV to the FIR. Updated laboratory data on amorphous carbon (HAC) and some PAH mixtures are analysed and compared with relevant literature. We find that the 2175 å hump can be due to very small (< a > ≥ 10 å) HAC grains. The UIR bands seem better explained by mixtures of HAC particles and collections of PAHs.