(Image credit: CFD simulation, S. Hari.)

Welcome to my webpage! Please contact me by email or by phone if you have any questions about my research and teaching. My contact information can be found on my ME Faculty Page.

Courses Offered

MEEN615: Advanced Thermodynamics

MEEN404: Engineering Laboratory (experiment design, analysis and reporting)

MEEN621: Fluid Mechanics

MEEN421: Thermal Fluid Analysis and Design

MEEN678: Aerosol Mechanics

MEEN344: Fluid Mechanics

Picture of the Month

Shown in the transmission electron micrograph are core-shell (g-Fe₂O₃/SiO₂) particles recently synthesized in my laboratory. These particles have a magnetic iron oxide core and a chemically inert silica shell. The particles shown had been soaked in 4% sulfuric acid overnight at room temperature without noticeable change. These particles may be used in biochemical labeling, biomedical imaging contrast enhancement, or special surface coatings.

Active Research

Aerosol sampling, concentration, collection and measurement

Synthesis of nanomaterials (e.g. Fe₂O₃, Al₂O₃, Y₂O₃, ZnO, SiO₂, carbon nanotubes, and composite particles)

Control of material properties in flame (combustion) synthesis

Thermodynamics, heat transfer and fluid dynamics in reacting aerosol flows

Gas sensing devices (sensors) using custom-synthesized nanomaterials

Toxicity (health effects) of engineered nanomaterials (airborne particulate matter)

Computational fluid dynamics analysis for aerosol flows

Aerosol sampling devices, e.g. impactors, virtual impactor, cyclones and inlets

Particle size effect on crystal structure of polymorphic ceramic oxides

Synergism between carbon and metals in health effects of particulates

Particulate emission from energy conversion processes

Available Lab Equipment

(Aerosol Mechanics Lab)

Custom-built flame synthesis devices; coflow burner; Thermolyne tube furnace

Organometallic (e.g. metal carbonyl) and salt solution (e.g. metal nitrate) precursor handling apparatus

Ultrasonic atomizers; air blast (pneumatic) nebulizer; ultrasound bath

Electrostatic precipitation (ESP) sampler; filter (filtration) samplers; thermophoretic probe

MKS mass flow controllers; flow meters; thermo couples;

Omega high temperature (1000-3000 ˚C) two color pyrometer

Vacuum pump; blowers; syringe pump

Varian Cary Eclipse fluorescence spectrophotometer (spectrometer)

Velmex 3-axis motorized stage

SRS high voltage (5kV) power supply; multi-output DC power supply

Keithley pico-ammeter

Analytica balance

Computers

(Aerosol Technology Lab)

High throughput aerosol flow platform (e.g. blowers, ducts, wind tunnel)

TSI 3450 Vibrating Orifice Aerosol Generator (VOAG)

TSI 3321 Aerodynamic Particle Sizer

TSI flow meter 4000 series

Newport optical table (4ft x 6 ft)

Filter holders (100 mm and 47 mm

Barstead/Turner Quantech fluorometer

Beckman multisizer 3 Coulter counter

Nikon Photometrics Coolsnap microscope

Eppendorf 5804 centrifuge

Mettler Toledo analytical balance

Research Experiences

Analytical methods including TEM, XRD, BET, TGA/DSC, etc.

Biological effects of metal oxide nanoparticles

Thermal chemistry analysis of ceramic oxide particles

Metal oxide aerosol formation in flames

Flame aerosol synthesis of fluorescent or magnetic nanoparticles

Molecular beam mass spectrometry

Transition metal particulate emission from combustion

Coal and biomass gasification

Coal-burning power generation

Recent Publications

Guo, B and Luo, Z.-P., “Particle Size Effect on the Crystal Structure of Y₂O₃ Particles Formed in a Flame Aerosol Process”, Journal of the American Ceramic Society, in press (2008)

Guo, B. and Kennedy, I. M., “Gas-Phase Flame Synthesis and Characterization of Iron Oxide Nanoparticles for Use in a Health Effects Study”, Journal of Aerosol Science and Technology, Vol. 41, pp. 944-951, 2007 (http://dx.doi.org/10.1080/02786820701604727)

Guo, B., Harvey, A., Neil, J., Kennedy, I.M., Navrotsky, A.. and Risbud, S.H., “Atmospheric Pressure Synthesis of Heavy Rare Earth Sesquioxides Nanoparticles of the Uncommon Monoclinic Phase”, Journal of the American Ceramic Society, in press, 2007, on line: DOI: 10.1111/j.1551-2916.2007.01961.x

Gojova, A., Guo, B., Kota, R.S., Rutledge, J.C., Kennedy, I.M., and Barakat, A.I., “Induction of Inflammation in Vascular Endothelial Cells by Metal Oxide Nanoparticles: Effect of Particle Composition”, Environmental Health Perspectives, Vol. 115, No. 3, pp. 403-9, 2007

Guo, B., A. Harvey, Risbud, S.H., and Kennedy, I., "The formation of cubic and monoclinic Y₂O₃ nanoparticles in a gas-phase flame process." Philosophical Magazine Letters Vol. 86, No. 7, pp. 457-467, 2006

Werner, M., Nico, P., Guo, P., Kennedy, I., and Anastasio, C. "Laboratory study of simulated atmospheric transformations of chromium in ultrafine combustion aerosol particles." Aerosol Science and Technology Vol. 40, No. 7, pp. 545-556, 2006

Dosi Dosev, Bing Guo, Ian Kennedy. Photoluminescence of Eu³⁺:Y₂O₃ as an indication of crystal structure and particle size in nanoparticles synthesized by flame spray pyrolysis. Journal of Aerosol Science, Vol. 37, No. 3, pp. 402-412, 2006

Ashley Harvey, Bing Guo, Ian Kennedy, Subhash Risbud and Valerie Leppert. A systematic study of the oxygen K edge in the cubic and less common monoclinic phases of the rare earth oxides (Ho, Er, Tm, Yb) by electron energy loss spectroscopy. Journal of Physics: Condensed Matter, Vol. 18, pp. 2181–2189, 2006

Heejung Jung, Bing Guo, Cort Anastasio and Ian M. Kennedy. Quantitative measurements of the generation of hydroxyl radicals by soot particles in a surrogate lung fluid. Atmospheric Environment, Vol. 40, pp. 1043-1052, 2006