Scott Lea

Scott Lea
Staff Member Title: 
Senior Research Scientist
Phone: 
(509) 371-6233
Contact Email: 
scott.lea@pnnl.gov
Overview: 

Dr. Lea provides scientific and technical expertise and leadership in support of EMSL’s user program, strategy and scientific productivity through leadership of microscopy capability and Quiet Wing for advanced microscopy. He also oversees activities and iinstrumentation in the scanning probe microscopy and Auger electron spectroscopy laboratories.

He developed the world’s first and only high-pressure atomic force microscopy (AFM) head capable of imaging mineral surfaces in supercritical carbon dioxide, and he is studying the effects of water content and temperature on the transformation of silicate minerals in carbon sequestration.

Details: 

Capability Lead, EMSL, 2009-present. Manages the microscopy capability that includes the scanning probe, electron and He ion microscopes and Quiet Wing for advanced microscopy. Works with numerous collaborators on Science Theme proposals, ranging from solid oxide fuel cells, catalysis, and chemical reactions that occur at mineral or aerosol interfaces. Also oversees activities and maintains instrumentation in the scanning probe microscopy and Auger electron spectroscopy laboratories.

 Scientific positions of increasing recognition, from Postdoc to Senior Research Scientist, EMSL, 1993-present.  Developed the world’s first and only high pressure AFM head capable of imaging mineral surfaces in supercritical carbon dioxide and has been a co-developer of an near real-time application program to improve the turnaround time between data collection and analysis in X-ray photoelectron spectroscopy. Supported other research programs related to the growth of novel nanoscale oxide structures and oxide films for the purposes of investigating microbe- mineral interactions, photocatalysis, and electronic applications in addition to supporting research programs on corrosion and grain boundary segregation in metals. More recently, involved in work enabling in-situ nanometer scale IR spectroscopic analysis of surfaces to better understand catalytic reactions.

Education: 
  • Ph.D. in Bioengineering, University of Utah (1993).
  • M.Engr. in Biomedical Engineering, Rensselaer Polytechnic Institute (1983).
  • B.S. in Biochemistry, Lehigh University (1981).
Awards & Honors: 
  • 2003-2004: PNNL Individual and Outstanding Team Performance Awards
  • 1987: University of Utah Graduate Research Fellowship Award, Curtis C. Johnson Award for outstanding 2nd year bioengineering student,
  • Phi Beta Kappa Honor Society
Research Interests: 

Since joining Pacific Northwest National Laboratory (PNNL), his research has focused primarily on: studying the effect of solution composition on calcite dissolution and incorporation of impurities into the calcite to better understand the fate and transport of contaminants in soil, examining the effect of solution composition and environmental conditions on transformations of minerals at the molecular scale under supercritical carbon dioxides to understand sequestration processes, investigating interparticle forces between colloids in solution to evaluate their behavior under high salt conditions, and understanding the relationship between organic matrix and inorganic crystal in biomineralization.

He has been investigating sample charging and damage due to exposure to x-rays and electron beams during analysis and sputtering effects on nanomaterials. He has developed the world’s first and only high pressure AFM head capable of imaging mineral surfaces in supercritical carbon dioxide and has been a co-developer of an near real-time application program to improve the turnaround time between data collection and analysis in x-ray photoelectron spectroscopy. More recently, he has been involved in a project enabling in-situ nanometer scale IR spectroscopic analysis of surfaces to better understand catalytic reactions.

 

Capabilities: 
Microscopy
Instrument(s): 
Geochemistry AFM (Icon)
Helios FIB/SEM
Helium Ion Microscope
Multimode AFM (Nanoscope)
Radiological TEM (ARM)
Scanning TEM
Scattering IR SNOM

Publications

2015

  • L Zhong, MJ Truex, N Kananizadeh, Y Li, AS Lea, X Yan. 2015. "Delivery of Vegetable Oil Suspensions in a Shear Thinning Fluid for Enhanced Bioremediation." Journal of Contaminant Hydrology 175-17617-25. 10.1016/j.jconhyd.2015.02.001

2013

  • IM Craig, MS Taubman, AS Lea, MC Phillips, EE Josberger, MBernd Raschke. 2013. "Infrared near-field spectroscopy of trace explosives using an external cavity quantum cascade laser." Optics Express 21(25)30401-30414. 10.1364/OE.21.030401

2012

  • CO Dimkpa, JE McLean, DW Britt, WP Johnson, BW Arey, AS Lea, AJ Anderson. 2012. "Nanospecific Inhibition of Pyoverdine Siderophore Production in Pseudomonas Chlororaphis O6 by CuO Nanoparticles." Chemical Research in Toxicology 25(5)1066-1074. 10.1021/tx3000285

2011

  • AS Lea, BC Kabius, BW Arey, L Kovarik, CM Wang, G Orr, I Lyubinetsky, RR Carper. 2011. "Quietly Building Capabilities: New Instruments, Expertise, "Quiet Wing" Available at DOE User Facility." Microscopy Today 19(5)48-53. 10.1017/S1551929511000964
  • GE Brown, A Chaka, DK Shuh, EE Roden, CJ Werth, NJ Hess, AR Felmy, KM Rosso, DR Baer, VL Bailey, ME Bowden, JW Grate, DW Hoyt, LR Kuprat, AS Lea, KT Mueller, M Oostrom, G Orr, L Pasa-Tolic, C Plata, EW Robinson, RG Teller, S Thevuthasan, H Wang, HS Wiley, MJ Wilkins. 2011. "EMSL Geochemistry, Biogeochemistry and Subsurface Science-Science Theme Advisory Panel Meeting."
  • W Jiang, JS McCloy, AS Lea, JA Sundararajan, Q Yao, Y Qiang. 2011. "Magnetization and susceptibility of ion irradiated granular magnetite films." Physical Review. B, Condensed Matter 83(13)134435:1-8. 10.1103/PhysRevB.83.134435
  • AS Lea, SR Higgins, KG Knauss, KM Rosso. 2011. "A high-pressure atomic force microscope for imaging in supercritical carbon dioxide." Review of Scientific Instruments 82(4)Article No.: 043709.

2010

  • DR Baer, AS Lea, J Geller, JS Hammond, L Kover, CJ Powell, MP Seah, M Suzuki, JW Watts, J Wolstenholme. 2010. "Approaches to analyzing insulators with Auger Electron Spectroscopy: Update and Overview." Journal of Electron Spectroscopy and Related Phenomena 176(1-3, SP ISS)80-94.
  • LV Saraf, DR Baer, AS Lea, Z Zhu, JJ Strohm, SD Sitzman, DL King. 2010. "Bulk Migration of Ni/NiO in Ni-YSZ during Reducing Conditions." Journal of the Electrochemical Society 157(4)B463-B469. 10.1149/1.3298442
  • DR Baer, MH Engelhard, AS Lea, P Nachimuthu, TC Droubay, J Kim, B Lee, C Mathews, RL Opila, LV Saraf, WF Stickle, R Wallace, BS Wright. 2010. "Comparison of the Sputter Rates of Oxide Films Relative to the Sputter Rate of SiO2." Journal of Vacuum Science and Technology A--Vacuum, Surfaces and Films 28(5)1060-1072. 10.1116/1.3456123
  • AS Lea, KR Swanson, JN Haack, JE Castle, SM Tougaard, DR Baer. 2010. "An Application for Near Real-time Analysis of XPS Data." Surface and Interface Analysis 42(6-7)1061-1065. 10.1002/sia.3304
  • AR Badireddy, S Chellam, PL Gassman, MH Engelhard, AS Lea, KM Rosso. 2010. "Role of Extracellular Polymeric Substances in Bioflocculation of Activated Sludge Microorganisms under Glucose‐Controlled Conditions." Water Research 44(2010)4505-4516. 10.1016/j.watres.2010.06.024
  • BJ Tarasevich, AS Lea, WJ Shaw. 2010. "The leucine rich amelogenin protein (LRAP) adsorbs as monomers or dimers onto surfaces." Journal of Structural Biology 169(3)266-276 .

2009

  • DR Baer, MH Engelhard, AR Felmy, JJ Ford, JZ Hu, AS Lea, P Nachimuthu, LV Saraf, JA Sears, S Thevuthasan. 2009. "New Approaches for Characterizing Sensor and Other Modern Complex Materials." ECS Transactions 19(6)137-148. 10.1149/1.3118546
  • BJ Tarasevich, AS Lea, W Bernt, MH Engelhard, WJ Shaw. 2009. "Changes in the quaternary structure of amelogenin when adsorbed onto surfaces." Biopolymers 91(2)103-107. 10.1002/bip.21095
  • BJ Tarasevich, AS Lea, W Bernt, MH Engelhard, WJ Shaw. 2009. "Adsorption of Amelogenin onto Self-Assembled and Fluoroapatite Surfaces." Journal of Physical Chemistry B 113(7)1833-1842.
  • FJ Stadermann, C Floss, MP Bose, AS Lea. 2009. "The Use of Auger Spectroscopy for the in situ Elemental Characterization of Sub-micrometer Presolar Grains." Meteoritics and Planetary Science 44(7)1033-1049.
  • Z Zhu, P Nachimuthu, AS Lea. 2009. "Molecular Depth Profiling of Sucrose Films: A Comparative Study of C₆₀n⁺ Ions and Traditional Cs⁺ and O₂⁺ Ions." Analytical Chemistry 81(20)8272-8279. 10.1021/ac900553z
  • JJ Strohm, DL King, LV Saraf, AS Lea, CM Wang, P Singh. 2009. "Influence of Reduction Pretreatment and Methane Reforming on Nickel Solubility in YSZ Grains and Nickel Sintering within Ni-YSZ SOFC Anode Materials."

2008

  • AR Badireddy, BR Korpol, S Chellam, PL Gassman, MH Engelhard, AS Lea, KM Rosso. 2008. "Spectroscopic Characterization of Extracellular Polymeric Substances from Escherichia coli and Serratia marcescens: Suppression using Sub-Inhibitory Concentrations of Bismuth Thiols." Biomacromolecules 9(11)3079-3089. 10.1021/bm800600p
  • T Yada, C Floss, FJ Stadermann, E Zinner, T Nakamura, T Noguchi, AS Lea. 2008. "Stardust in Antarctic Micrometeorites." Meteoritics and Planetary Science 43(8)1287-1298.
  • F Karagulian, AS Lea, CW Dilbeck, BJ Finlayson-Pitts. 2008. "A New Mechanism for Ozonolysis of Unsaturated Organics on Solids: Phosphocholines on NaCl as A Model for Sea Salt particles." Physical Chemistry Chemical Physics. PCCP 10(4)528-541. 10.1039/b712715d

2007

  • LV Saraf, MH Engelhard, P Nachimuthu, V Shutthanandan, CM Wang, SM Heald, DE McCready, AS Lea, DR Baer, SA Chambers. 2007. "Nucleation and Growth of MOCVD Grown (Cr, Zn)O Films – Uniform Doping vs. Secondary Phase Formation." Journal of the Electrochemical Society 154(3)D134-D138. 10.1149/1.2424422
  • LV Saraf, MH Engelhard, CM Wang, AS Lea, DE McCready, V Shutthanandan, DR Baer, SA Chambers. 2007. "Metalorganic chemical vapor deposition of carbon-free ZnO using the bis(2,2,6,6 tetramethyl-3,5-heptanedionato)zinc precursor." Journal of Materials Research 22(5)1230-1234. 10.1557/JMR.2007.0146
  • LV Saraf, MH Engelhard, CM Wang, AS Lea, DE McCready, V Shutthanandan, DR Baer, SA Chambers. 2007. "Metalorganic chemical vapor deposition of carbon-free ZnO using the bis(2,2,6,6-tetramethyl-3,5-heptanedionato)zinc precursor." Journal of Materials Research 22(5)1230-1234. 10.1557/JMR.2007.0146
  • LV Saraf, MH Engelhard, AS Lea. 2007. "Fabrication of SiO2 Microdisk Arrays for Optics and Light Trapping Experiments." Microelectronic Engineering 84(12)2799-2803. 10.1016/j.mee.2007.02.001
  • DP Devineni, S Stormo, W Kempf, J Schenkel, R Behanan, AS Lea, DW Galipeau. 2007. "Metal-oxide Nanowires for Toxic Gas Detection."

2006

  • DR Baer, MH Engelhard, CM Wang, AS Lea, KH Pecher. 2006. "The Challenges and Opportunities of Measuring Properties of Nanoparticles and Nanostructured Materials: Importance of a Multi-Technique Approach."
  • TC Kaspar, TC Droubay, DE McCready, P Nachimuthu, SM Heald, CM Wang, AS Lea, V Shutthanandan, SA Chambers, MF Toney. 2006. "Magnetic properties of epitaxial Co-doped anatase TiO2 thin films with excellent structural quality." Journal of Vacuum Science and Technology B--Microelectronics and Nanometer Structures 24(4)2012-2017. 10.1116/1.2216723
  • C Floss, FJ Stadermann, JP Bradley, Z Dai, S Bajt, G Giles, AS Lea. 2006. "Identification of Isotopically Primitive Interplanetary Dust Particles: A NanoSIMS Isotopic Imaging Study." Geochimica et Cosmochimica Acta 70(9)2371-2399. 10.1016/j.gca.2006.01.023
  • G Liu, J Wang, AS Lea, Y Lin. 2006. "Bioassay Labels Based on Apoferritin Nanovehicles." Chembiochem 7(9)1315-1319. 10.1002/cbic.200600225
  • TM Mcintire, R Smalley, JT Newberg, AS Lea, JC Hemminger, BJ Finlayson-Pitts. 2006. "Substrate Changes Associated with the Chemistry of Self-Assembled Monolayers on Silicon.." Langmuir 22(13)5617-5624. 10.1021/la060153l

2005

  • DR Baer, MH Engelhard, AS Lea, LV Saraf. 2005. "Simple Method for Estimating and Comparing of X-Ray Damage Rates." Journal of Vacuum Science and Technology A--Vacuum, Surfaces and Films 23(6)1740-1744. 10.1116/1.2073387
  • I Lyubinetsky, AS Lea, S Thevuthasan, DR Baer. 2005. "Formation of Epitaxial Oxide Nanodots on Oxide Substrate: Cu₂O on SrTiO₃(100)." Surface Science 589(1-3)120-128.
  • TC Kaspar, TC Droubay, CM Wang, SM Heald, AS Lea, SA Chambers. 2005. "Co-doped Anatase TiO₂ Heteroepitaxy on Si(001)." Journal of Applied Physics 97(7)073511-073511-10. 10.1063/1.1868854
  • V Arjunan, J Lamb, D Chandra, J Daemen, DA Jones, MH Engelhard, AS Lea. 2005. "Electrochemical Corrosion Behavior of Low Carbon I-Beam Steels In Simulated Yucca Mountain Repository Environment." Corrosion 61(4)381-391.
  • TM Mcintire, AS Lea, DJ Gaspar, N Jaitly, Y Dubowski, Q Li, BJ Finlayson-Pitts. 2005. "Unusual aggregates from the oxidation of alkene self-assembled monolayers: a previously unrecognized mechanism for SAM ozonolysis?." Physical Chemistry Chemical Physics. PCCP 73605-3609. 10.1039/b508147e

2004

  • LV Saraf, JS Young, AS Lea, S Thevuthasan, GC Dunham, JW Grate, DR Baer. 2004. "Lateral Ordering of Microfabricated SiO₂ Nanotips." Electrochemical and Solid-State Letters 7(1)C7-C9.
  • RE Williford, DR Baer, JE Amonette, AS Lea. 2004. "Dissolution and Growth of (10(1) over-bar4) Calcite in Flowing Water: Estimation of Back Reaction Rates via Kinetic Monte Carlo Simulations." Journal of Crystal Growth 262(1-4)503-518.
  • I Lyubinetsky, A El-Azab, AS Lea, S Thevuthasan, DR Baer. 2004. "Initial Stages of Oxide Nanodot Heteroepitaxial Growth: Cu2O on SrTiO3(100)." Applied Physics Letters 85(19)4481-4483.
  • YJ Kim, S Thevuthasan, TC Droubay, AS Lea, CM Wang, V Shutthanandan, SA Chambers, R Sears, B Taylor, B Sinkovic. 2004. "Growth and Properties of molecular beam epitaxially grown ferromagnetic Fe-doped TiO2 rutile films on TiO2." Applied Physics Letters 84(18)3531-3533.
  • V Deodeshmukh, A Venugopal, D Chandra, A Yilmaz, J Daemen, DA Jones, AS Lea, MH Engelhard. 2004. "X-ray Photoelectron Spectroscopic Analyses of Corrosion Products Formed on Rock Bolt Carbon Steel in Chloride Media with Bicarbonate and Silicate Ions." Corrosion Science 46(11)2629-2649.

2003

  • AS Lea, TT Hurt, A El-Azab, JE Amonette, DR Baer. 2003. "Heteroepitaxial Growth of a Manganese Carbonate secondary Nano-Phase on the (101_4) Surface of Calcite in Solution." Surface Science 524(1-3)63-77.
  • P Nachimuthu, S Thevuthasan, YJ Kim, AS Lea, V Shutthanandan, MH Engelhard, DR Baer, SA Chambers, DK Shuh, D Lindle, EM Gullikson, RC Perera. 2003. "Investigation of Copper(I) Oxide Quantum Dots by Near-Edge X-ray Absorption Fine Structure Spectroscopy." Chemistry of Materials 20(15)3939-3946.
  • DR Baer, DJ Gaspar, MH Engelhard, AS Lea. 2003. "Beam Effects During AES and XPS Analysis."
  • DR Baer, MH Engelhard, AS Lea, DJ Gaspar. 2003. "Appendix F: Comparing Beam Damage Rates Using Susceptibility Tables."
  • MH Engelhard, DR Baer, AS Lea. 2003. "Beam damage of poly(2-chloroethyl methylacrylate) [PCEMA] films as observed by x-ray photoelectron spectroscopy at 143 K, 303 K, and 373 K." Surface Science Spectra 1080-100.
  • AS Lea, MH Engelhard, DR Baer. 2003. "Electron Beam Damage in Poly(Vinyl Chloride) and Poly(Acrylonitrile) as Observed by Auger Electron Spectroscopy." Surface Science Spectra 1067-79.
  • MH Engelhard, DR Baer, AS Lea. 2003. "Beam damage of poly(vinyl chloride) [PVC] as observed by x-ray photoelectron spectroscopy at 143 K, 303 K and 373 K.." Surface Science Spectra 10101-116.
  • DR Baer, MH Engelhard, AS Lea. 2003. "Introduction to Surface Science Spectra Data on Electron and X-ray Damage: Sample Degradation during XPS and AES Measurements." Surface Science Spectra 10(1-4)47-56.
  • SA Chambers, TC Droubay, CM Wang, AS Lea, RFC Farrow, L Folks, V Deline, S Anders. 2003. "Clusters and Magnetism in Epitaxial Co-doped TiO₂ Anatase.." Applied Physics Letters 82(8)1257-1259.

2002

  • AS Lea, JE Amonette, AA El-Azab, DR Baer, SM Heald, NG Colton. 2002. "Manganese at Calcite Surfaces: Molecular-Scale Studies of Dissolution and Heteroepitaxy."
  • AA Rouse, C Szeles, JO Ndap, S Soldner, KB Parnham, DJ Gaspar, MH Engelhard, AS Lea, V Shutthanandan, S Thevuthasan, DR Baer. 2002. "Interfacial Chemistry and the Performance of Bromine-etched CdZnTe Radiation Detector Devices." IEEE Transactions on Nuclear Science 49(4)2005-2009.
  • DR Baer, Y Liang, AS Lea, JE Amonette, NG Colton. 2002. "Scanning Force Microscopy Measurements of Dissolution and Growth Processes: CaCO₃ Examples."
  • DJ Gaspar, AS Lea, MH Engelhard, DR Baer, R Miehr, PG Tratnyek. 2002. "Evidence for Localization of Reaction Upon Reduction of Carbon Tetrachloride by Granular Iron." Langmuir 18(20)7688-7693.
  • DR Baer, MH Engelhard, DJ Gaspar, AS Lea, CF Windisch. 2002. "Use and Limitations of Electron Flood Gun Control of Surface Potential During XPS: Two Non-homogeneous Sample Types." Surface and Interface Analysis 33781-790.
  • SA Chambers, CM Wang, S Thevuthasan, TC Droubay, DE McCready, AS Lea, V Shutthanandan, CF Windisch. 2002. "Epitaxial Growth and Properties of MBE Grown Ferromagnetic Co-doped TiO₂ Anatase Films on SrTiO₃(001) and LaAlO₃(001)." Thin Solid Films 418(2)197-210.

2001

  • AS Lea, JE Amonette, DR Baer, Y Liang, NG Colton. 2001. "Microscopic Effects of Carbonate, Manganese, and Strontium ions on Calcite Dissolution." Geochimica et Cosmochimica Acta 65 (3)369-379.
  • E Paparazzo, AS Lea, DR Baer, JP Northover. 2001. "Scanning Auger Microscopy Studies of an Ancient Bronze." Journal of Vacuum Science and Technology A--Vacuum, Surfaces and Films 19(4 PT 1)1126-1133.
  • Y Liang, AS Lea, DE McCready, P Meethunkij. 2001. "Synthesis and Characterization of Self-Assembled Cu2O Nano-Dots."

2000

  • Y Gao, S He, PV Alluri, MH Engelhard, AS Lea, JM Finder, B Melnick, RL Hance. 2000. "Effects of precursors and substrate materials on microstructure dielectric properties, and step coverage of (Ba, Sr)TiO3 films grown by metalorganic chemical vapor deposition." Journal of Applied Physics 87(1)124-132.
  • Y Gao, S He, PV Alluri, AS Lea, J Finder, B Melnick, RL Hance. 2000. "Effects of Precursors and Substrate Materials on Microstructure, Dielectric Properties and Step Coverage of (Ba,Sr)TiO3 Films Grown by Metalorganic Chemical Vapor Deposition ." Journal of Applied Physics 87(1)124-132.
  • NG Petrik, K Knutsen, E Paparazzo, AS Lea, DM Camaioni, TM Orlando. 2000. "Electron Beam Induced Damage of NaNO3 Single Crystals: An Energy, Temperature, and Quantum State Resolved Study." Journal of Physical Chemistry B 104(7)1563-1571.

1999

  • Y Gao, PV Alluri, S He, MH Engelhard, AS Lea, B Melnick, RL Hance. 1999. "Surface Roughness and Growth Texture of (Ba,Sr)TiO3 Thin Films Formed by MOCVD."