AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Reduced Graphene Oxide: Towards an Absorbing Aerosol Standard
JAMES RADNEY, Christopher Zangmeister, National Institute of Standards and Technology
Abstract Number: 586 Working Group: Instrumentation and Methods
Abstract Gas-phase absorption measurements have made steady technical advancement due to the utilization of calibration standards that allow for instrument calibration and intercomparison. To date, no such material exists for aerosol optical measurements. Here, we demonstrate the feasibility of thermally reduced graphene oxide (rGO) aerosol as a candidate for an absorbing aerosol standard. Graphene oxide solutions were prepared by horn sonication of multi-sheet assemblies in DI H2O to produce a solution that is shelf-stable for long periods of time. The solution was aerosolized forming aerosol particles with a morphology resembling crumpled paper and reduced at 220 degrees Celcius to produce particles that behave as mass absorbers for sizes below ≈ 400 nm. Using pre-measured mass specific cross-sections, we observe agreement between the solution concentration and spectra of the polydisperse aerosol, measured using a photoacoustic spectrometer. Further, we show that rGO makes a good candidate for comparison between in situ spectra and filter based measurements.