Measured in-situ mass absorption spectra for nine forms of highly-absorbing carbonaceous aerosol. (September 2018)

• Record Type: Journal Article
• Authors: Zangmeister, Christopher D.; You, Rian; Lunny, Elizabeth M.; Jacobson, Arne E.; Okumura, Mitchio; Zachariah, Michael R.; Radney, James G.
• Is Part Of: Carbon. Volume 136(2018)
• Page Start: 85
• Page End: 93
• Publication Date: 2018-09
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2018.04.057
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Mass absorption coefficient spectra were measured between λ = 500 nm and 840 nm for nine forms of highly-absorbing carbonaceous aerosol: five samples generated from gas-, liquid- and solid-fueled flames; spark-discharge fullerene soot; graphene and reduced graphene oxide (rGO) crumpled nanosheets; and fullerene (C60 ) assemblies. Aerosol absorption spectra were measured for size- and mass-selected particles and found to be dependent on fuel type and formative conditions. Flame-generated particles had morphologies consistent with freshly emitted black carbon (BC) with mass absorption coefficients (MAC) ranging between 3.8 m 2 g −1 and 8.6 m 2 g −1 at λ = 550 nm. Absorption Ångström exponents ( AAE ) – i.e. MAC spectral dependence – ranged between 1.0 and 1.3 for flame-generated particles and up to 7.5 for C60 . The dependence of MAC and AAE on mobility diameter and particle morphology was also investigated. Lastly, the current data were compared to all previously published MAC measurements of highly-absorbing carbonaceous aerosol. Graphical abstract: Image 1