Mengdawn Cheng

Mengdawn Cheng

Distinguished R&D Staff Member

Bio

Dr. Cheng has been employed by ORNL since the early 90s. His initial work focused on the atmospheric chemistry and fate and transport modeling of the uranium species. He was subsequently accepted an opportunity to work for the DOE ARM program to study the effects of atmospheric aerosols on clouds and radiation balance. Dr. Cheng has a diverse research portfolio and extensive experience in aerosol related topics. He was tasked to develop advanced aerosol technologies for solving a wide range of environmental pollution problems since the mid 1990s. He has worked with the Wright-Patterson AFRL in the past couple of decades to study the emissions and formation of particulate matter in aircraft engines and combustors. Several unique instruments were developed and patented. Their works led to the SAE standards on sampling of non-volatile particulate matter. Dr. Cheng had also led the SAE technical panel on Bleed and Cabin Air. He combined his ARM experience turning his aerosol research laboratory to investigate the interactions of aerosols with high-intensity beams. His group published a series of theoretical and experimental papers on aerosol-light interactions and aerosol breakdown in intense radiation fields. Dr. Cheng has worked with scientists at Eglin AFRL to explore the use of aerosol science and technology in defense and security applications, and on climate change issues focusing on a short-term climate forcing agent by identifying sources and quantifying attributions of black carbon observed in the Arctic. He has worked with scientists in the US and around the world on the exposure and toxicity aspects of nanoparticles emitted by engines and nano-manufacturing processes. The work led to their involvement in the report on the Environmental Safety and Health of Nanomaterials published by the Council of Canadian Academies in 2008. Recently, Dr. Cheng engages his research actively to explore and apply fundamental aerosol science and technology to nuclear forensics and electro-magnetic properties of aerosols. Dr. Cheng has produced a total of 277 peer-reviewed publications and has been awarded 4 patents in aerosol instrumentation and control technologies. Two more patents are pending. He has received several awards for his project leadership, technical achievement and scientific advisory services. During his tenure at ORNL, Dr. Cheng has mentored 7 postdoc fellows, 6 Ph.D. students, 7 undergraduate theses, and interacted with many summer interim students and faculty members.

 

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