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John Holecek
M.S., 2008, University of California, San Diego
Projects: Aircraft Instrument, Maldive Islands and CIFEX, Cloud Condensation Nuclei
John entered the graduate program at Scripps Institution of Oceanography and joined the Prather Lab in the fall of 2002. He worked on reducing the large uncertainties of aerosol-cloud interactions (indirect effect) on climate. He also worked on the development of a new aircraft instrument, studies of rain samples, and performed lab and field studies.
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Stephen Toner (2007)
e-mail: smtoner@ucsd.edu
B.S., 2000, California State University - Northridge
M.S., 2004, University of California, San Diego
Ph.D., 2007, University of California, San Diego
Projects: Source Characterization & Source Apportionment
1st Author Papers: Single Particle Characterization of Ultrafine and Accumulation Mode Particles from Heavy Duty Diesel Vehicles Using Aerosol Time-of-Flight Mass Spectrometry
Using mass spectral source signatures to apportion exhaust particles from gasoline and diesel powered vehicles in a freeway study using UF-ATOFMS
His research has focused on anthropogenic aerosol source characterization and atmospheric apportionment, and in particular, vehicular source characterization / apportionment. Other sources he's characterized have included coal combustion, wood burning, and solid-fuel rocket motor exhaust.
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Matt Spencer (2007)
e-mail: Matt.Spencer@nanocomposix.com
B.S., 2000, Chemistry & B.S., 2000, Biochemistry, Colorado State University
M.S., 2004, University of California San Diego
Ph.D., 2007, University of California San Diego
Projects: Aerosol Quantification, EC/OC properties
One project of Matt's was quantitative measurements of organic carbon (OC) and elemental carbon (EC) in ambient particles using laser desorption ionization mass spectrometry. Another involved measurements of particle effective density and chemical information using DMA/UF-ATOFMS technique. Newer projects included measuring free radicals in particles using Electron Paramagnetic Resonance (EPR) and initial development and feasibility studies using ATOFMS for analysis of paramagnetic bead and colloidal gold based bio-molecule separations. Matt's field work included the particle concentrator characterization, CIFEX, APMEX, SOAR I, and SOAR II.
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Sharon Qin (2007)
e-mail: xqin@ksu.edu
B.S., 2000, Peking University, China
M.S, 2002, University of California Irvine
Ph.D., 2007, University of California San Diego
Projects: Source Apportionment, Aerosol Quantification
Sharon joined the group in September 2002. Her research focused on comparing ambient aerosol composition in different locations through various aging process, including seasonal and urban vs. rural differences. The aerosol size range in the system is between 0.2 um and 2.5 um. She also worked on acquiring quantitative mass concentration from ATOFMS measurements ultimately for obtaining high temporal mass fraction of each chemical component and source apportionment.
Current Job: at Kansas State University
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Ryan Moffet (2007)
e-mail: rcmoffet@lbl.gov
B.S., 2002, San Francisco State University
M.S., 2004, University of California San Diego
Ph.D., 2007, University of California San Diego
Projects: Aircraft Instrument (Shirley), Optical Properties of Aerosols
1st Author Papers: Extending ATOFMS measurements to include refractive index and density,
Ryan joined the group in 2002. He is interested in the optical properties of aerosols and exploring methods for observing them with the ATOFMS. He is also involved with the aircraft project.
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David A. Sodeman (2004)
Undergraduate Degree: B.S in Chemistry from the University of California Riverside in 1999
e-mail: David.Sodeman@dri.edu
website: http://www.dri.edu/
dissertation: "Characterization of ambient, automobile, and diesel aerosols utilizing Aerosol Time of Flight Mass Spectrometry"
Current Job: Post-Doctoral Research Associate Desert Research Institute
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Keith R. Coffee (2002)
Undergraduate Degree: San Francisco State Univeristy 1997
e-mail: coffee3@llnl.gov
website: http://www-cms.llnl.gov/PostDocs/bios/coffee.html
dissertation: "Single particle characterization of soil and dust particulate matter in the urban and marine environments"
Current Job: Lawrence Livermore National Laboratories
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Philip Joseph Silva (2000)
Undergraduate Degree: B.S. in chemistry from Loyola Maymount University.
e-mail: psilva@cc.usu.edu
website: http://www.chem.usu.edu/~psilva/
dissertation: "Source profiling and apportionment of airborne particles : a new approach using aerosol time-of-flight mass spectrometry"
Current Job: Assistant Professor at Utah State University
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Bradley Douglas Morrical (1999)
Undergraduate Degree: B.S. from Wabash College
dissertation: "The design and application of a field transportable time-of-flight mass spectrometer (ATOFMS) and use of two step laser desorption/ionization (L2MS) to determine PAH in single particles"
Current Job: Hoffman Laroche in Switzerland
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Christopher Alan Noble (1999)
Undergraduate Degree: B.A. in Engineering-Physics from Point Loma Nazarene University
e-mail: noble@rti.org
website: www.rti.org
dissertation: "Single particle analysis of transient variations occurring in atmospheric aerosols"
Group Publications:
Jobs: Atmospheric chemist in the Engineering and Technology Division of the RTI International in North Carolina. Currently working for the government.
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Trent Nordmeyer (1995)
Undergraduate Degree: B.S. in chemistry from Brigham Young University
dissertation: "The design and construction of an aerosol time-of-flight mass spectrometer for ambient aerosol analysis"
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Dr. Ying Wang
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Dr. Hiroshi Furutani
e-mail: mailto:hiroshif@ori.u-tokyo.ac.jp
B.S., 1991, Osaka University (Japan); M.S., 1993, Osaka University
Ph.D, 1997, Osaka University
Postdoctoral Fellow 1997-2001 University of Tokyo (Japan)
Projects: Marine Aerosols, CI-ATOFMS, Nanoparticles, Aircraft Instrument
Hiroshi joined the group in 2001 just before the move from Riverside. He was quite interested in marine aerosols. In particular he studied the ejection of aerosols from bubble bursting and marine organisms on particles. He also looked at gold nanoparticles with the ATOFMS and lead the development of the new Chemical Ionization - Aerosol Time of Flight Mass Spectrometer (CI-ATOFMS).
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Dr. Thomas Rebotier
e-mail: rebotier@hotmail.com
website: http://www.atofms.ucsd.edu/rebotier.html
Ingénieur Civil des Mines, 1983, Ecole des Mines de Paris
Ph.D. (Cognitive Science), 1998, University of California, San Diego
Projects: Source Apportionment, Dataset Classification
Thomas joined the Prather Lab in September 2004. He contributed to our software all along the data processing chain, from instrumental signal processing to classification to result-presentation. His research topics included cars vs. diesel truck aerosol apportionment, large dataset classification, and making aerosol classification robust with respect to particle aging.
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Gary Poon (2004-2005)
Graduate Degree: Ph.D from the University of California San Diego under the guidance of Prof. Andy Kummel.
e-mail: gcpoon@ucsd.edu
Location: Minneapolis, Minnesota
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Sergio Adrian Guazzotti (2001-2004)
Graduate Degree: Ph.D. Chemistry from the University of California Riverside under the supervision of Prof. Prather in June 2001
e-mail: sergio.guazzotti@nanostream.com
website:
Group Publications:
Current Job: Working as VP of Engineering at Nanostream in Pasedena, CA.
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Yongxuan Su (2001-2003)
Graduate Degree: Ph.D. (1998) in Analytical Chemistry from Xiamen University in China
e-mail:
website: http://chem-tech.ucsd.edu/Recharges/MassSpec/
Current Job: Developmental Engineer in the Mass Spectrometry Facility at the University of California San Diego
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George Khairallah (2000-2002)
Graduate Degree: Ph.D. from Latrobe University in Melbourne, Australia under the guidance of Dr. J. Barrie Peel's
e-mail: gkhai@unimelb.edu.au
website: http://www.unimelb.edu.au/
Group Publications:
Current Job: Research Fellow at the University of Melbourne, Austrailia
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Stefania Angelino
Graduate Degree: Ph.D. from the University of Torino (Italy) under the direction of M.C. Gennaro.
e-mail:
website:
Group Publications:
Current Job: DuPont in London
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Markus Gälli
Graduate Degree: Ph.D. at the University of Bern under the supervision of U. P. Schlunegger
e-mail: markus.gaelli@tsi.com
website: www.tsi.com
Current Job: Working with the ATOFMS at TSI Inc in Shoreview Minnesota
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Maggie Yandell
Projects: Aircraft Instrument
Maggie worked with the Prather group since she was a freshman. Her primary focus has been contributing during field studies and analysing data from Long Beach. She also worked on the health effects project in colloraboration with Professor Mike Tauber. She is currently a chemistry graduate student at UC Berkeley.
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Brandon Heilman
Projects: Standards and Fireworks
Brandon joined the lab in Fall 2008 until he graduated in Spring 2009. He worked on quantifying chemical standards and analyzing firework fingerprints. He is now a chemistry graduate student at UC Santa Cruz.
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Rene Sanchez
Projects: Aircraft Instrument
Rene worked with the Prather group from June of 2004 until August 2006. His primary focus has been to develop the operating system for the Aircraft-Aerosol Time-of-Flight Mass Spectrometer (A-ATOFMS) using LabVIEW. Rene is working on his PhD in Mechanical Engineering with an emphasis in controls at University of California.
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Jessie Charrier
Projects: Aerosols from Bubble Bursting
Jessie is a fourth year chemistry major at UCSD and has been working with the Prather group since the spring of 2004. Her primary focus has been to
investigate the ability of salt aerosols produced by air bubble bursting to transport an organic surfactant into the aerosol phase. After graduating in June Jessie is planning to work in industry for a year and then go to grad school and get her PhD.
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Kevin Ramazan
Eric Barthel
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