Physical and Optical Properties of Aerodynamically Classified BC and BrC. JAMES ALLAN, Dawei Hu, Rami Alfarra, Kate Szpek, Justin Langridge, Michael Cotterell, Claire Belcher, Ian Rule, Zixia Liu, Chenjie Yu, Yunqi Shao, Aristeidis Voliotis, Mao Du, Brett Smith, Gregory Smallwood, Prem Lobo, Dantong Liu, Jim Haywood, Hugh Coe, University of Manchester and NCAS