Gregory (Greg) Smallwood

Roles and responsibilities

  • As President’s Science Advisor and as Secretary, President’s Research Excellence Advisory Committee (PREAC), provide leadership, advice, and guidance on a wide range of topics related to research excellence at NRC. 
  • As Principal Research Officer, engage in multidisciplinary science with both experiments and numerical simulation covering research, development, and application of optical diagnostic techniques in combustion systems and for black carbon; nanoparticle formation; nanoparticle characterization; and particulate and black carbon emissions. 
  • Serve as an ambassador for nanotechnology and combustion science, raising awareness of recent advances, participating in international standardization committees, and providing technical insights to the policy and regulatory fields of air, marine, and ground transportation.

Current research and/or projects

  • Addressing environmental metrology through the development of black carbon measurement science, articulating the challenges and promising approaches to regulators and policymakers dealing with climate change, air quality, health, emissions of black carbon, and atmospheric monitoring.

  • Supporting nanotechnology in Canada and internationally with SCC and ISO/TC229 standards development and with support for NanoCanada through networking and foreign missions.

Research and/or project statements

  • Investigating issues surrounding quantitative measurements of black carbon (BC) nanoparticles, including physical and chemical properties of black carbon, surface contaminants, and co-emitted species that may affect the uncertainty associated with the measurement. 
  • Developing a detailed understanding of the underlying physical principles behind many black carbon measurement instruments to aid in interpreting differences in response of instruments to identical sources of BC
  • Developing sources and methods for calibration of instruments to measure mass concentration of black carbon nanoaerosols, with application to emissions from ground, air, and marine sources as well as atmospheric environmental measurements.
  • Leading a project with Transport Canada regarding regulatory and technical development research on nonvolatile particulate matter (nvPM) and black carbon emissions from civil aviation gas turbine engines
  • With a successful NRC-Germany Call for Project Development Proposal, leading a project exploring measurement science for gas phase graphene synthesis between NRC and the University of Duisburg-Essen (UDE)


  • Ph.D. (Mechanical Engineering)  Cranfield University, UK, 2009
  • M.A.Sc. (Mechanical Engineering) University of Ottawa, 1992
  • B.A.Sc. (Mechanical Engineering) Queen's University, 1983

Professional activities/interests

  • President’s Science Advisor (NRC)
  • Fellow of The Combustion Institute
  • International Organization for Standardization (ISO)Technical Committee 229 Nanotechnologies, Canadian Mirror Committee Chair
  • International Civil Aviation Organization (ICAO) CAEP Working Group 3 (Emissions Technical), delegate from Canada and liaison to SAE E-31
  • Society for Automotive Engineers (SAE) E-31 Aircraft Exhaust Emissions Measurement Committee member and liaison to/from ICAO CAEP WG-3
  • NanoCanada, member and delegate for Canada on foreign missions
  • Natural Resources Canada (NRCan) Energy Information Program Transportation Committee member
  • Mentor or co-supervisor to 29 Research Associates, PDFs, and graduate students (4 currently)
  • Meeting organizer for many international conferences and meetings
  • Invited/plenary/keynote speaker to numerous conferences and symposia


  • Mercator-Fellow, Centre for NanoIntegration Duisburg-Essen, University of Duisburg-Essen, Germany
  • Editorial Board, Progress in Energy and Combustion Science (2017 Impact Factor: 25.242)
  • Member, Institute for Liquid Atomization and Spray Systems – North and South America (ILASS-Americas)
  • Member, The Combustion Institute, and Combustion Institute, Canadian Section (CICS)


  • Fellow of The Combustion Institute (2018)
  • Transport Canada National Award of Excellence (2013)
  • NRC/MSS Peer Awards for outstanding leadership and commitment to MSS, and for exceeding the highest expectations in client engagement (2012)
  • NASA Group Achievement Award presented to the Alternative Aviation Fuel Experiment (AAFEX-II) Team (2012)
  • Forest R. McFarland Award from the Society for Automotive Engineers (2007)
  • NRC/ICPET Research Discovery Award – shared with Fengshan Liu and Dave Snelling (2006)
  • “Fast Breaking paper” citation in the field of Engineering by Essential Science Indicators (2006)
  • NRC/ICPET Industry Client Partnership Award – shared with Kevin Jonasson, Mike Gattrell, and Thom McCracken (2005)
  • NRC Industrial Partnership Award – Laser Diagnostics Team (2003)
  • SAE Outstanding Presentation Award (1996)
  • NRC/IECE staff performance award for Advanced CARS (coherent anti-Stokes Raman spectroscopy) Team (1993)

Inventions and patents

  • Two patents were licensed in 2000 to Artium Technologies, Inc. for “Method and Apparatus for Applying Laser-Induced Incandescence for the Determination of Particulate Measurements”.  Artium has produced two instruments based on the licensed technology, the LII 200 and the LII 300.  The license was renewed in 2010, and Artium continues to achieve commercial success in producing these instruments.

Key publications

  • Eric A. Grulke, Stephen B. Rice, JinCheng Xiong, Kazuhiro Yamamoto, Tae Hyun Yoon, Kevin Thomson, Meghdad Saffaripour, Greg J. Smallwood, Joshua W. Lambert, Arnold J. Stromberg, Ryan Macy, Nicolas J. Briot, Dali Qian, “Size and shape distributions of carbon black aggregates by transmission electron microscopy,” Carbon, 130, 822-833 (2018).
  • Meghdad Saffaripour, Li-Lin Tay, Kevin A. Thomson, Gregory J. Smallwood, Benjamin T. Brem, Lukas Durdina, and Mark Johnson, “Raman spectroscopy and TEM characterization of solid particulate matter emitted from soot generators and aircraft turbine engines,” Aerosol Science and Technology, 51, 518-531 (2017).
  • H.A. Michelsen, C. Schulz, G.J. Smallwood, S. Will, “Laser-induced incandescence: Particulate diagnostics for combustion, atmospheric, and industrial applications,” Progress in Energy and Combustion Science, 51, 2-48 (2015).
  • C. Schulz, B. Kock, M. Hofmann, H. Michelsen, S. Will, B. Bougie, R. Suntz, G. Smallwood, “Laser-induced incandescence: recent trends and current questions,” Applied Physics B, 83, 333-354 (2006).
  • David R. Snelling, Gregory J. Smallwood, Fengshan Liu, Ömer L. Gülder, and William D. Bachalo, “A calibration-independent laser-induced incandescence technique for soot measurement by detecting absolute light intensity,” Applied Optics, 44, 6773-6785 (2005).
Gregory (Greg) Smallwood

Gregory (Greg) Smallwood

Principal Research Officer
1200 Montreal Road
Ottawa, Ontario K1A 0R6
Preferred language: English
Telephone: 613-993-1391

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Energy, Air Emissions, Future Fuels, Renewable Fuels, Environment, Air, Air Pollution & Quality, Particulate matter, Climate, Climate Change and Processes, Measurement Science, Technology, Nanotechnology, Transportation, Aviation, Road