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Staff information

Wayne

Wayne Hess

Physical Sciences
Physicist, Team Lead
Pacific Northwest National Laboratory
PO Box 999
MSIN: K8-88
Richland, WA 99352

Biography

My research is centered on laser-excitation of solids and surfaces. We have ongoing research programs in laser desorption from wide-band gap materials, metal oxides, and semiconductors. Many of the key photophysical processes in laser solid interactions, such as electron/hole-pair generation and recombination, exciton relaxation, and electron-phonon interactions, occur on an ultrafast time-scale. Therefore, we have developed femtosecond laser techniques, in addition to nanosecond studies, to clarify the role of ultrafast phenomena involved in laser material interactions and excited-state condensed-phase processes. Recently, we initiated a program to explore dynamics of mesoscopic surface structures. In particular, we are studying localized and propagating surface plasmons using photoemission electron microscopy and both surface and tip enhanced Raman spectroscopy (SERS and TERS). My team and I are actively engaged in collaboration with theory groups to understand the dynamical details of localized and propagating plasmons and their relationship to single-molecule Raman scattering. Our ultimate goal is a broad-based mechanistic understanding of excited-state dynamics of surface structures, plasmonics, and ultrasensitive chemical imaging. We have demonstrated single-molecule detection and designed manipulation (e.g., focusing) of propagating plasmons. Ultimately, our efforts are directed toward providing the radiation and analytical chemistry research needs required by the U.S. Department of Energy’s energy and environmental restoration missions.

Currently, I am serving as Interim Director of the Physical Sciences Division.

Research Interests

  • Laser desorption and surface modification
  • Surface and tip-enhanced Raman spectroscopy
  • Localized and propagating surface plasmon dynamics

Education and Credentials

  • Ph.D. Physical Chemistry, University of Colorado, Boulder, CO, January, 1988
  • M.S. Chemical Physics, University of Oregon, Eugene, OR, May 1983
  • B.A. Chemistry, University of Colorado, Boulder, CO, May 1981.

Affiliations and Professional Service

  • American Chemical Society
  • American Physical Society
  • SPIE

Awards and Recognitions

  • American Physical Society Fellow, 2012
  • Co-Chairman Eighth International Conference on Laser Ablation (COLA 05)
  • Associate Editor: Laser Chemistry
  • International Steering Committee, International Conference on Laser Ablation
  • Vice-chair Gordon Research Conference: Laser Interactions with Materials

PNNL Publications

2017

  • Bhattarai A., A.G. Joly, W.P. Hess, and P.Z. El-Khoury. 2017. "Visualizing Electric Fields at Au(111) Step Edges via Tip-Enhanced Raman Scattering." Nano Letters 17, no. 11:7131-7137. PNNL-SA-129323. doi:10.1021/acs.nanolett.7b04027
  • Fischer S.A., E. Apra, N. Govind, W.P. Hess, and P.Z. El-Khoury. 2017. "Non-Equilibrium Chemical Effects in Single Molecule SERS Revealed by ab initio Molecular Dynamics Simulations." Journal of Physical Chemistry A 121, no. 6:1344-1350. PNNL-SA-122695. doi:10.1021/acs.jpca.6b12156
  • Gong Y., A.G. Joly, P.Z. El-Khoury, and W.P. Hess. 2017. "Polarization Directed Surface Plasmon Polariton Launching." Journal of Physical Chemistry Letters 8, no. 1:49-54. PNNL-SA-121461. doi:10.1021/acs.jpclett.6b02509
  • Gong Y., A.G. Joly, X. Zhang, P.Z. El-Khoury, and W.P. Hess. 2017. "Surface Plasmon Coupling and Control using Spherical Cap Structures." Journal of Physical Chemistry Letters 8, no. 12:2695-2699. PNNL-SA-125352. doi:10.1021/acs.jpclett.7b00852
  • Novikova I.V., C.R. Smallwood, Y. Gong, D. Hu, L. Hendricks, J.E. Evans, and A. Bhattarai, et al. 2017. "Multimodal Hyperspectral Optical Microscopy." Chemical Physics 498-499. PNNL-SA-120193. doi:10.1016/j.chemphys.2017.08.011

2016

  • El-Khoury P.Z., A.G. Joly, and W.P. Hess. 2016. "Hyperspectral Dark Field Optical Microscopy of Single Silver Nanospheres." Journal of Physical Chemistry C 120, no. 13:7295-7298. PNNL-SA-115933. doi:10.1021/acs.jpcc.6b02401
  • El-Khoury P.Z., P. Abellan Baeza, Y. Gong, F.S. Hage, J. Cottom, A.G. Joly, and R. Brydson, et al. 2016. "Visualizing Surface Plasmons with Photons, Photoelectrons, and Electrons." Analyst 141, no. 12:3562-3572. PNNL-SA-115897. doi:10.1039/c6an00308g
  • El-Khoury P.Z., P. Abellan, R.L. Chantry, Y. Gong, A.G. Joly, I.V. Novikova, and J.E. Evans, et al. 2016. "The information content in single-molecule Raman nanoscopy." Advances in Physics: X 1, no. 1:35-54. PNNL-SA-114470. doi:10.1080/23746149.2016.1140010
  • Fischer S.A., T.W. Ueltschi, P.Z. El-Khoury, A.L. Mifflin, W.P. Hess, H. Wang, and C.J. Cramer, et al. 2016. "Infrared and Raman Spectroscopy from Ab Initio Molecular Dynamics and Static Normal Mode Analysis: The C-H Region of DMSO as a Case Study." Journal of Physical Chemistry B 120, no. 8:1429-1436. PNNL-SA-109387. doi:10.1021/acs.jpcb.5b03323
  • Gong Y., A.G. Joly, P.Z. El-Khoury, and W.P. Hess. 2016. "Enhanced Propagating Surface Plasmon Signal Detection." ACS Photonics 3, no. 12:2413-2419. PNNL-SA-121997. doi:10.1021/acsphotonics.6b00636
  • Halliday M.T., W.P. Hess, and A. Shluger. 2016. "A mechanism of Cu work function reduction in CsBr/Cu photocathodes." Physical Chemistry Chemical Physics. PCCP 18, no. 10:7427-7434. PNNL-SA-114774. doi:10.1039/c5cp07694c
  • Ueltschi T.W., S.A. Fischer, E. Apra, A.N. Tarnovsky, N. Govind, P.Z. El-Khoury, and W.P. Hess. 2016. "Time-Domain Simulations of Transient Species in Experimentally Relevant Environments." Journal of Physical Chemistry A 120, no. 4:556-561. PNNL-SA-114738. doi:10.1021/acs.jpca.5b11710

2015

  • Davidson R.B., J.I. Ziegler, G. Vargas, S.M. Avanesyan, Y. Gong, W.P. Hess, and R.F. Haglund Jr. 2015. "Efficient Forward Second-Harmonic Generation from Planar Archimedean Nanospirals." Nanophotonics 4, no. 1:108-113. PNNL-SA-107834. doi:10.1515/nanoph-2015-0002
  • Droubay T.C., L. Kong, S.A. Chambers, and W.P. Hess. 2015. "Work Function Reduction by BaO: Growth of Crystalline Barium Oxide on Ag(001) and Ag(111) Surfaces." Surface Science 632. PNNL-SA-102305. doi:10.1016/j.susc.2014.07.010
  • El-Khoury P.Z., G.E. Johnson, I.V. Novikova, Y. Gong, A.G. Joly, J.E. Evans, and M. Zamkov, et al. 2015. "Enhanced Raman Scattering from Aromatic Dithiols Electrosprayed into Plasmonic Nanojunctions." Faraday Discussions 184. PNNL-SA-109386. doi:10.1039/C5FD00036J
  • El-Khoury P.Z., Y. Gong, P. Abellan, B.W. Arey, A.G. Joly, D. Hu, and J.E. Evans, et al. 2015. "Tip-Enhanced Raman Nanographs: Mapping Topography and Local Electric Fields." Nano Letters 15, no. 4:2385-2390. PNNL-SA-106991. doi:10.1021/acs.nanolett.5b00609
  • Gong Y., A.G. Joly, D. Hu, P.Z. El-Khoury, and W.P. Hess. 2015. "Ultrafast Imaging of Surface Plasmons Propagating on a Gold Surface." Nano Letters 15, no. 5:3472-3478. PNNL-SA-108438. doi:10.1021/acs.nanolett.5b00803
  • Gong Y., A.G. Joly, P.Z. El-Khoury, and W.P. Hess. 2015. "Efficient Coupling and Transport of a Surface Plasmon at 780 nm in a Gold Nanostructure." In Plasmonics: Metallic Nanostructures and Their Optical Properties XIII, August 9, 2015, San Diego, California. Proceedings of the SPIE, edited by AD Boardman and DP Tsai, 9547, Paper No. 95470H. Bellingham, Washington:SPIE, the International Society for Optics and Photonics. PNNL-SA-111002. doi:10.1117/12.2190449
  • Halliday M.T., A.G. Joly, W.P. Hess, and A. Shluger. 2015. "Photoinduced Br Desorption from CsBr Thin Films Grown on Cu(100)." Journal of Physical Chemistry C 119, no. 42:24036-24045. PNNL-SA-114919. doi:10.1021/acs.jpcc.5b08275
  • Halliday M.T., W.P. Hess, and A.L. Shluger. 2015. "Structure and properties of electronic and hole centers in CsBr from theoretical calculations." Journal of Physics: Condensed Matter 27, no. 24:245501. PNNL-SA-108312. doi:10.1088/0953-8984/27/24/245501
  • Kong L., A.G. Joly, T.C. Droubay, and W.P. Hess. 2015. "Quantum Efficiency Enhancement in CsI/Metal Photocathodes." Chemical Physics Letters 621. PNNL-SA-107505. doi:10.1016/j.cplett.2015.01.010

2014

  • Cao H., W. He, Y. Mao, X. Lin, K. Ishikawa, J.H. Dickerson, and W.P. Hess. 2014. "Recent progress in degradation and stabilization of organic solar cells." Journal of Power Sources 264. PNNL-SA-102653. doi:10.1016/j.jpowsour.2014.04.080
  • Droubay T.C., S.A. Chambers, A.G. Joly, W.P. Hess, K. Nemeth, K.C. Harkay, and L. Spentzouris. 2014. "Metal-Insulator Photocathode Heterojunction for Directed Electron Emission." Physical Review Letters 112, no. 6:067601(5). PNNL-SA-97936. doi:10.1103/PhysRevLett.112.067601
  • El-Khoury P.Z., and W.P. Hess. 2014. "Vibronic Raman Scattering at the Quantum Limit of Plasmons." Nano Letters 14, no. 7:4114-4118. PNNL-SA-102123. doi:10.1021/nl501690u
  • El-Khoury P.Z., E. Khon, Y. Gong, A.G. Joly, P. Abellan, J.E. Evans, and N.D. Browning, et al. 2014. "Electric Field Enhancement in a Self-Assembled 2D Array of Silver Nanospheres." Journal of Chemical Physics 141, no. 21:Article No. 214308. PNNL-SA-105010. doi:10.1063/1.4902905
  • El-Khoury P.Z., K. Honkala, and W.P. Hess. 2014. "Electronic and Vibrational Properties of Meso-Tetraphenylporphyrin on Silver Substrates." Journal of Physical Chemistry A 118, no. 37:8115-8123. PNNL-SA-99895. doi:10.1021/jp412360b
  • El-Khoury P.Z., T.W. Ueltschi, A.L. Mifflin, D. Hu, and W.P. Hess. 2014. "Frequency Resolved Nanoscale Chemical Imaging of 4,4'-Dimercaptostilbene on Silver." Journal of Physical Chemistry C 118, no. 47:27525-27530. PNNL-SA-100249. doi:10.1021/jp509082c
  • Gong Y., A.G. Joly, L. Kong, P.Z. El-Khoury, and W.P. Hess. 2014. "High Brightness Plasmon-Enhanced Nanostructured Gold Photoemitters." Physical Review Applied 2, no. 6:Article No. 064012. PNNL-SA-100555. doi:10.1103/PhysRevApplied.2.064012
  • Gong Y., A.G. Joly, P.Z. El-Khoury, and W.P. Hess. 2014. "Interferometric Plasmonic Lensing with Nanohole Arrays." Journal of Physical Chemistry Letters 5, no. 24:4243-4248. PNNL-SA-106215. doi:10.1021/jz502296n
  • Gong Y., A.G. Joly, P.Z. El-Khoury, and W.P. Hess. 2014. "Nonlinear Photoemission Electron Micrographs of Plasmonic Nanoholes in Gold Thin Films." Journal of Physical Chemistry C 118, no. 44:25671-25676. PNNL-SA-105747. doi:10.1021/jp509900h
  • Kong L., A.G. Joly, T.C. Droubay, Y. Gong, and W.P. Hess. 2014. "Enhanced Quantum Efficiency From Hybrid Cesium Halide/Copper Photocathode." Applied Physics Letters 104, no. 17:Article No. 171106. PNNL-SA-101664. doi:10.1063/1.4874339

2013

  • Devaraj A., R.J. Colby, W.P. Hess, D.E. Perea, and S. Thevuthasan. 2013. "Role of Photoexcitation and Field Ionization in the Measurement of Accurate Oxide Stoichiometry by Laser-Assisted Atom Probe Tomography." The Journal of Physical Chemistry Letters 4, no. 6:993-998. PNNL-SA-92674. doi:10.1021/jz400015h
  • El-Khoury P.Z., and W.P. Hess. 2013. "Raman Scattering from 1,3-Propanedithiol at a Hot Spot: Theory Meets Experiment." Chemical Physics Letters 581. PNNL-SA-92753. doi:10.1016/j.cplett.2013.05.066
  • El-Khoury P.Z., D. Hu, and W.P. Hess. 2013. "Junction Plasmon-Induced Molecular Reorientation." Journal of Physical Chemistry Letters 4, no. 20:3435-3439. PNNL-SA-97929. doi:10.1021/jz401838b
  • El-Khoury P.Z., D. Hu, V. Apkarian, and W.P. Hess. 2013. "Raman Scattering at Plasmonic Junctions Shorted by Conductive Molecular Bridges." Nano Letters 13, no. 4:1858-1861. PNNL-SA-93981. doi:10.1021/nl400733r
  • El-Khoury P.Z., E.J. Bylaska, and W.P. Hess. 2013. "Time Domain Simulations of Chemical Bonding Effects in Surface-Enhanced Spectroscopy." Journal of Chemical Physics 139, no. 17:Article No. 174303. PNNL-SA-96865. doi:10.1063/1.4827455
  • El-Khoury P.Z., S.J. Peppernick, D. Hu, A.G. Joly, and W.P. Hess. 2013. "The Origin of Surface-Enhanced Raman Scattering of 4,4' -Biphenyldicarboxylate on Silver Substrates." Journal of Physical Chemistry C 117, no. 14:7260-7268. PNNL-SA-92092. doi:10.1021/jp401026x
  • Halliday M.T., A.G. Joly, W.P. Hess, P. Sushko, and A.L. Shluger. 2013. "Mechanisms of Photodesorption of Br Atoms from CsBr Surfaces." Journal of Physical Chemistry C 117, no. 26:13502-13509. PNNL-SA-94776. doi:10.1021/jp4036343
  • He W., S. VilayurGanapathy, A.G. Joly, T.C. Droubay, S.A. Chambers, J.R. Maldonado, and W.P. Hess. 2013. "Comparison of CsBr and KBr coated Cu photocathodes: Effects of laser irradiation and work function changes." Applied Physics Letters 102, no. 7:Article No. 071604. PNNL-SA-92864. doi:10.1063/1.4793214
  • Lin J., W. He, S. Vilayur Ganapathy, S.J. Peppernick, B. Wang, S. Palepu, and M. Remec, et al. 2013. "Growth of solid and hollow gold particles through the thermal annealing of nanoscale patterned thin films." ACS Applied Materials & Interfaces 5, no. 22:11590-11596. PNNL-SA-96995. doi:10.1021/am402633u
  • Peppernick S.J., A.G. Joly, K.M. Beck, and W.P. Hess. 2013. "Plasmon-Induced Optical Field Enhancement studied by Correlated Scanning and Photoemission Electron Microscopy." Journal of Chemical Physics 138, no. 15:Article No. 154701. PNNL-SA-93520. doi:10.1063/1.4799937
  • Peppernick S.J., A.G. Joly, K.M. Beck, W.P. Hess, J. Wang, Y. Wang, and W. Wei. 2013. "Photoemission Electron Microscopy of a Plasmonic Silver Nanoparticle Trimer." Applied Physics A, Materials Science and Processing 112, no. 1:35-39. PNNL-SA-84162. doi:10.1007/s00339-012-7316-5
  • Polyakov A., C. Senft, K.F. Thompson, J. Feng, S. Cabrini, P.J. Schuck, and H. Padmore, et al. 2013. "Plasmon-enhanced photocathode for high brightness and high repetition rate x-ray sources." Physical Review Letters 110, no. 7:Article No. 076802. PNNL-SA-93302. doi:10.1103/PhysRevLett.110.076802
  • Vilayur Ganapathy S., M.I. Nandasiri, A.G. Joly, P.Z. El-Khoury, T. Varga, G.W. Coffey, and B. Schwenzer, et al. 2013. "Silver nanorod arrays for photocathode applications." Applied Physics Letters 103, no. 16:Article No. 161112. PNNL-SA-97756. doi:10.1063/1.4825262

2012

  • Peppernick S.J., A.G. Joly, K.M. Beck, and W.P. Hess. 2012. "Near-Field Focused Photoemission from Polystyrene Microspheres Studied with Photoemission Electron Microscopy." Journal of Chemical Physics 137, no. 1:124202-1/9. PNNL-SA-89597. doi:10.1063/1.4730598
  • Shutthanandan V., Z. Zhu, M.L. Stutzman, F. Hannon, C. Hernandez-Garcia, M.I. Nandasiri, and S.N. Kuchibhatla, et al. 2012. "Surface Science Analysis of GaAs Photocathodes Following Sustained Electron Beam Delivery." Physical Review Special Topics - Accelerators and Beams 15, no. 6:063501. PNNL-SA-82424. doi:10.1103/PhysRevSTAB.15.063501

2011

  • Fredricksen C.J., D.R. Panjwani, J.P. Arnold, P.N. Figueiredo, F.K. Rezaie, J.E. Colwell, and K. Baillie, et al. 2011. "Plasmonic enhancement of thin-film solar cells using gold-black coatings." In Next Generation (Nano) Photonic and Cell Tehcnologies for Solar Energy Conversion II, August 21, 2011, San Diego, California. Proceedings of the SPIE, edited by L Tsakalakos, 8111, Article No. 811106. Bellingham, Washington:SPIE. PNNL-SA-82070. doi:10.1117/12.893620
  • Peppernick S.J., A.G. Joly, K.M. Beck, and W.P. Hess. 2011. "Plasmonic Field Enhancement of Individual Nanoparticles by Correlated Scanning and Photoemission Electron Microscopy." Journal of Chemical Physics 134, no. 3:034507-1/7. PNNL-SA-74489. doi:10.1063/1.3543714
  • Sushko P.V., A.L. Shluger, A.G. Joly, K.M. Beck, and W.P. Hess. 2011. "Exciton-driven highly hyperthermal O-atom desorption from nanostructured CaO." Journal of Physical Chemistry C 115, no. 3:692-699. PNNL-SA-74573. doi:10.1021/jp1078423

2010

  • Beck K.M., A.G. Joly, and W.P. Hess. 2010. "Effect of Surface Charge on Laser-induced Neutral Atom Desorption." Applied Physics A, Materials Science and Processing 101, no. 1:61-64. PNNL-SA-69648. doi:10.1007/s00339-010-5758-1
  • Joly A.G., K.M. Beck, and W.P. Hess. 2010. "Surface-Specific Laser Matter Interactions and Dynamics." In International Symposium on High Power Laser Ablation, April 18-22, 2010, Santa Fe, NM: AIP Conference Proceedings, edited by C Phipps, 1278, 90-97. Melville, New York:American Institute of Physics. PNNL-SA-70662. doi:10.1063/1.3507187
  • Xiong G., R. Shao, S.J. Peppernick, A.G. Joly, K.M. Beck, W.P. Hess, and M. Cai, et al. 2010. "Materials Applications of Photoelectron Emission Microscopy." JOM. The Journal of the Minerals, Metals and Materials Society 62, no. 12:90-93. PNNL-SA-74908. doi:10.1007/s11837-010-0189-1

2009

  • Beck K.M., A.G. Joly, and W.P. Hess. 2009. "Two-color Laser Desorption of Nanostructured MgO Thin Films." Applied Surface Science 255, no. 24:9562-9565. PNNL-SA-62094. doi:10.1016/j.apsusc.2009.04.089
  • Govind N., P.V. Sushko, W.P. Hess, M. Valiev, and K. Kowalski. 2009. "Excitons in Potassium Bromide: A Study using Embedded Time-dependent Density Functional Theory and Equation-of-Motion Coupled Cluster Methods." Chemical Physics Letters 470, no. 4-6:353-357. PNNL-SA-63223. doi:10.1016/j.cplett.2009.01.073
  • Joly A.G., K.M. Beck, and W.P. Hess. 2009. "Photodesorption of excited iodine atoms from KI (100)." Journal of Chemical Physics 131, no. 14:144509-1/6. PNNL-SA-67047.
  • Khan E.H., S.C. Langford, J.T. Dickinson, L.A. Boatner, and W.P. Hess. 2009. "Photoinduced Formation of Zinc Nanoparticles by UV Laser Irradiation of ZnO." Langmuir 25, no. 4:1930-1933. PNNL-SA-65727.
  • Trevisanutto P.E., P.V. Sushko, K.M. Beck, A.G. Joly, W.P. Hess, and A.L. Shluger. 2009. "Excitation, Ionization, and Desorption: How Sub-band gap Photons Modify the Structure of Oxide Nanoparticles." Journal of Physical Chemistry C 113, no. 4:1274-1279. PNNL-SA-62194.

2008

  • Beck K.M., A.G. Joly, O.E. Diwald, S. Stankic, P.E. Trevisanutto, P.V. Sushko, and A.L. Shluger, et al. 2008. "Energy and Site Selectivity in O-Atom Photodesorption from Nanostructured MgO." Surface Science 602, no. 11:1968-1973. PNNL-SA-58128. doi:10.1016/j.susc.2008.03.046
  • Joly A.G., K.M. Beck, and W.P. Hess. 2008. "Electronic Energy Transfer on CaO Surfaces." Journal of Chemical Physics 129, no. 12:124704. PNNL-SA-61221. doi:10.1063/1.2980049

2007

  • Cai M., S.C. Langford, J.T. Dickinson, G. Xiong, T.C. Droubay, A.G. Joly, and K.M. Beck, et al. 2007. "An In Situ Study of the Martensitic Transformation in Shape Memory Alloys Using Photoemission Electron Microscopy." Journal of Nuclear Materials 361, no. 2-3:306-312. PNNL-SA-49612. doi:10.1016/j.jnucmat.2006.12.008
  • Cai M., S.C. Langford, M.J. Wu, W.M. Huang, G. Xiong, T.C. Droubay, and A.G. Joly, et al. 2007. "Study of Martensitic Phase transformation in a NiTiCu Thin Film Shape Memory Alloy Using Photoelectron Emission Microscopy." Advanced Functional Materials 17, no. 1:161-167. PNNL-SA-49610. doi:10.1002/adfm.200600611
  • Hess W.P., P.R. Herman, D.W. Bauerle, and H. Koinuma. 2007. The 8th International Conference on Laser Ablation (COLA' 05); Journal of Physics: Conference Series. Bristol:IOP Publishing. PNNL-SA-57405.
  • Joly A.G., G. Xiong, C.M. Wang, D.E. McCready, K.M. Beck, and W.P. Hess. 2007. "Synthesis and Photoexcited Charge Carrier Dynamics of beta-FeOOH Nanorods." Applied Physics Letters 90, no. 10:Art. No. 103504. PNNL-SA-52077. doi:10.1063/1.2711395
  • Wei W., G. Xiong, Y. Sun, A.G. Joly, K.M. Beck, J.M. White, and W.P. Hess. 2007. "Real Time Study of Cu Diffusion Through a Ru Thin Film by Photoemission Electron Microscopy (PEEM)." In Materials, technology and reliability of low-k dielectrics and copper interconnects. Materials Research Society Symposium Proceedings; 2006, edited by Ting Y Tsui, 914, 185-190 (Paper no. 0914-F05-07). Warrendale, Pennsylvania:Material Research Society. PNNL-SA-49613.
  • Wei W., S.L. Parker, Y. Sun, J.M. White, G. Xiong, A.G. Joly, and K.M. Beck, et al. 2007. "Study of Copper Diffusion Through Ruthenium Thin Film by Photoemission Electron Microscopy." Applied Physics Letters 90. PNNL-SA-52829. doi:10.1063/1.2712832
  • Xiong G., R. Shao, T.C. Droubay, A.G. Joly, K.M. Beck, S.A. Chambers, and W.P. Hess. 2007. "Photoemission Electron Microscopy of TiO2 Anatase Films Embedded with Rutile Nanocrystals." Advanced Functional Materials 17, no. 13:2133-2138. PNNL-SA-53255. doi:10.1002/adfm.200700146

2006

  • Beck K.M., M. Henyk, C.M. Wang, P.E. Trevisanutto, P. Sushko, W.P. Hess, and A.L. Shluger. 2006. "Site-Specific Laser Modification of MgO nanoclusters: Towards Atomic-Scale Surface Structuring." Physical Review. B, Condensed Matter 74. PNNL-SA-47691.
  • Joly A.G., J.R. Williams, S.A. Chambers, G. Xiong, W.P. Hess, and D.M. Laman. 2006. "Carrier Dynamics in a-Fe2O3 (0001) Thin Films and Single Crystals Probed by Femtosecond Transient Absorption and Reflectivity." Journal of Applied Physics 99, no. 5:Article: 053521 (6 pages). PNNL-SA-45700.
  • Joly A.G., M. Henyk, K.M. Beck, P.E. Trevisanutto, P.V. Sushko, W.P. Hess, and A.L. Shluger. 2006. "Probing Electron Transfer Dynamics at MgO Surfaces by Mg-Atom Desorption." Journal of Physical Chemistry B 110, no. 37:18093-18096. PNNL-SA-50864. doi:10.1021/jp064092b
  • Tanimura K., E. Inami, J. Kanasaki, and W.P. Hess. 2006. "Two-Hole Localization Mechanism for Electron Bond Rupture of Surface Atoms by Laser-Induced Valence Excitation of Semiconductors." Physical Review. B, Condensed Matter and Materials Physics 74, no. 3:Art. No. 035337. PNNL-SA-48394. doi:10.1103/PhysRevB.74.035337
  • Xiong G., A.G. Joly, G.R. Holtom, C.M. Wang, D.E. McCready, K.M. Beck, and W.P. Hess. 2006. "Excited Carrier Dynamics of a-Cr2O3/a-Fe2O3 Core-Shell Nanostructures." Journal of Physical Chemistry B 110, no. 34:16937-16940. PNNL-SA-50398. doi:10.1021/jp062507n S1520-6106(06)02507-7
  • Xiong G., A.G. Joly, K.M. Beck, and W.P. Hess. 2006. "Laser-Induced Oxygen Vacancy Formation and Diffusion on TiO2(110) Surfaces Probed by Photoemission Electron Microscopy." Physica Status Solidi C 3, no. 10:3598-3602. PNNL-SA-50474.
  • Xiong G., A.G. Joly, K.M. Beck, W.P. Hess, M. Cai, S.C. Langford, and J.T. Dickinson. 2006. "In Situ Photoelectron Emission Microscopy of a Thermally Induced Martensitic Transformation in a CuZnAI Shape Memory Alloy." Applied Physics Letters 88, no. 9:Art. No. 091910. PNNL-SA-47843.
  • Xiong G., A.G. Joly, W.P. Hess, M. Cai, and J.T. Dickinson. 2006. "Introduction to Photoelectron Emission Microscopy: Principles and Applications." Journal of Chinese Electron Microscopy Society 25, no. 1:15-25. PNNL-SA-45670.

2005

  • Henyk M., K.M. Beck, M.H. Engelhard, A.G. Joly, W.P. Hess, and J.T. Dickinson. 2005. "Surface Electronic Properties and Site-Specific Laser Desorption Processes of Highly Structured Nanoporous MgO Thin Films." Surface Science 593, no. 1-3:242-247. PNNL-SA-44464.
  • Hess W.P., A.G. Joly, K.M. Beck, M. Henyk, P.V. Sushko, P.E. Trevisanutto, and A.L. Shluger. 2005. "Laser Control of Desorption Through Selective Surface Excitation." Journal of Physical Chemistry B 109, no. 42:19563-19578. PNNL-SA-45473. doi:10.1021/jp0523672
  • Nwe K.H., S.C. Langford, J.T. Dickinson, and W.P. Hess. 2005. "Interaction of Wide-Band-Gap Single Crystals with 248-nm Excimer Laser Irradiation: X. Laser-Induced Near-Surface Absorption in Single-Crystal NaC1." Journal of Applied Physics 97, no. 4:Article no. 043501. PNNL-SA-43898.
  • Nwe K.H., S.C. Langford, J.T. Dickinson, and W.P. Hess. 2005. "Interaction of Wide-Band-Gap Single Crystals With 248-nm Excimer Laser Radiation: XI. The Effect of Water Vapor and Temperature on Laser Desorption of Neutral Atoms From Sodium Chloride." Journal of Applied Physics 97. PNNL-SA-43897.
  • Trevisanutto P.E., P.V. Sushko, A.L. Shluger, K.M. Beck, M. Henyk, A.G. Joly, and W.P. Hess. 2005. "A Mechanism of Photo-Induced Desorption of Oxygen Atoms From MgO Nano-Crystals." Surface Science 593, no. 1-3:210-220. PNNL-SA-44755.

2004

  • Beck K.M., A.G. Joly, N.F. Dupuis, P. Perozzo, W.P. Hess, P.V. Sushko, and A.L. Shluger. 2004. "Laser Control of Product Electronic State: Desorption from Alkali Halides." Journal of Chemical Physics 120, no. 5:2456-2463. PNNL-SA-39229.
  • Espana A.L., A.G. Joly, W.P. Hess, and J.T. Dickinson. 2004. "Laser-Induced Damage of Calcium Fluoride." Journal of Undergraduate Research Volume IV, 2004. PNNL-SA-40508.
  • Hess W.P., A.G. Joly, K.M. Beck, P.V. Sushko, and A.L. Shluger. 2004. "Determination of Surface Exciton Energies by Velocity Resolved Atomic Desorption." Surface Science 564, no. 1-3:62-70. PNNL-SA-40479.
  • Joly A.G., W.P. Hess, and K.M. Beck. 2004. "Time-Resolved Femtosecond Laser Desorption from Alkali Halide Crystals." In High-Power Laser Ablation V. Proceedings of the SPIE, edited by Claude R. Phipps, 5448, 532-537. Bellingham:International Society Optical Engineering. PNNL-SA-41296.
  • Tanimura K., and W.P. Hess. 2004. "Temperature-Dependent Yield of Frenkel Pairs Generated by Valence Excitation in NaCl." Physical Review. B, Condensed Matter 69. PNNL-SA-41297.
  • Tanimura K., and W.P. Hess. 2004. "Temperature-Dependent Yield of Frenkel-Pairs Generated by Valence Excitation in NaCl." Physical Review. B, Condensed Matter 69, no. 15:155102-1-155102-7. PNNL-SA-37443.

2003

  • Dickinson J.T., K.H. Nwe, W.P. Hess, S.C. Langford, and S.C. Langford. 2003. "Synergistic Effects of Exposure of Surfaces of Ionic Crystals to Radiation and Water." Applied Surface Science 208. PNNL-SA-39737.
  • Henyk M., A.G. Joly, K.M. Beck, and W.P. Hess. 2003. "Photon stimulated desorption from KI: Laser control of I-atom velocity distributions." Surface Science 528, no. 1-3:219-223. PNNL-SA-36324.
  • Joly A.G., K.M. Beck, M. Henyk, W.P. Hess, P.V. Sushko, and A.L. Shluger. 2003. "Surface Electronic Spectra Detected by Atomic Desorption." Surface Science 544, no. 1:L683-L688. PNNL-SA-37977.
  • Kaspar T.C., A.C. Tuan, R.G. Tonkyn, W.P. Hess, J. Rogers, Jr., and Y. Ono. 2003. "The Role of O(1D) in the Oxidation of Si(100)." Journal of Vacuum Science and Technology B--Microelectronics and Nanometer Structures 21, no. 2:895-899. PNWD-SA-5762.
  • Withers S.H., R.E. Peale, A. Schulte, G. Braunstein, K.M. Beck, W.P. Hess, and R.J. Reeder. 2003. "Broad Distribution of Crystal Field Environments for Nd3+ in Calcite." Physics and Chemistry of Minerals 30, no. 7:440 - 448. PNNL-SA-35648.

2002

  • Elzinga E.J., R. Reeder, S.H. Withers, R.E. Peale, R.A. Mason, K.M. Beck, and W.P. Hess. 2002. ""EXAFS Study of Rare-Earth Element Coordination in Calcite"." Geochimica et Cosmochimica Acta 66, no. 16:2875-2885. PNNL-SA-35257.
  • Hess W.P., A.G. Joly, D.P. Gerrity, K.M. Beck, P.V. Sushko, and A.L. Shluger. 2002. "Control of Laser Desorption Using Tunable Single Pulses and Pulse Pairs." Journal of Chemical Physics 116, no. 18:8144-8151. PNNL-SA-36059.
  • Hess W.P., A.G. Joly, K.M. Beck, and J.T. Dickinson. 2002. "Time-Resolved Femtosecond Laser Desorption from Wide-BandGap Single Crystals." In High-Power Laser Ablation IV, Proc. SPIE, edited by Claude R. Phipps, 4760, 318-325. Bellingham, Washington:SPIE. PNNL-SA-36088.
  • Hess W.P., A.G. Joly, K.M. Beck, D.P. Gerrity, P.V. Sushko, and A.L. Shluger. 2002. "Solid-State Halogen Atom Source for Chemical Dynamics and Etching." Applied Physics Letters 81, no. 6:1140-1142. PNNL-SA-35780.
  • Joly A.G., W.P. Hess, K.M. Beck, and J.T. Dickinson. 2002. "Femtosecond Time-Resolved Photo-Stimulated Desorption from Ionic Crystals." Applied Surface Science 186, no. 1-4:339-344. PNNL-SA-34867.
  • Mccurdy P.R., W.P. Hess, and S.S. Xantheas. 2002. "Nitric acid-water complexes: Theoretical calculations and comparison to experiment." Journal of Physical Chemistry 106, no. 33:7628-7635. PNNL-SA-35804.
  • Papantonakis M.R., J.S. Kim, W.P. Hess, and R.F. Haglund. 2002. "What do Matrix-Assisted Laser Desorption/Ionization Mass Spectra Reveal about Ionization Mechanisms?." Journal of Mass Spectrometry 37. PNNL-SA-35070.

2001

  • Beck K.M., A.G. Joly, and W.P. Hess. 2001. "Evidence for a Surface Exciton in KBr via Laser Desorption." Physical Review. B, Condensed Matter 63, no. 12:125423(6). PNNL-SA-33478.
  • Campbell J.A., W.P. Hess, J.R. Lohman, and S.C. Goheen. 2001. "Analysis of Hanford-Related Organics Using Matrix-Assisted Laser Desorption Ionization Time-Of-Flight Mass Spectrometry." Journal of Radioanalytical and Nuclear Chemistry 250, no. 2:247-253. PNNL-SA-34605.
  • Campbell J.A., W.P. Hess, J.R. Lohman, and S.C. Goheen. 2001. "Analysis of Hanford-related Organics using Matrix-assisted Laser Desorption Ionization Time-of-flight Mass Spectrometry." Journal of Radioanalytical and Nuclear Chemistry 250, no. 2:247-253. PNNL-SA-37067.
  • Hess W.P., A.G. Joly, D.P. Gerrity, K.M. Beck, P. Sushko, and A. Shluger. 2001. "Selective laser desorption of ionic surfaces: resonant surface excitation of KBr." Journal of Chemical Physics 115, no. 20:9463 - 9472. PNNL-SA-34994.
  • Mccurdy P.R., E.R. Vorpagel, and W.P. Hess. 2001. "Ultraviolet Photochemistry of Hydrogen-Bonded HBr-Acetone Complexes in Argon Matrices." Journal of Chemical Physics 114, no. 1:169-178. PNNL-SA-32621.
  • Reeder R.J., M. Nugent, C.D. Tait, D.E. Morris, S.M. Heald, K.M. Beck, and W.P. Hess, et al. 2001. "Coprecipitation of Uranium (VI) with Calcite: XAFS, Micro-XAS,and Luminescence Characterization." Geochimica et Cosmochimica Acta 65, no. 20:3491-3503. PNNL-SA-34282.

2000

  • Beck K.M., A.G. Joly, and W.P. Hess. 2000. "Time-resolved Femtosecond Laser Induced Desorption from Magnesium Oxide and Lithium Fluoride Single Crystals." Surface Science 451. PNNL-SA-31461.
  • Beck K.M., A.G. Joly, and W.P. Hess. 2000. "Time-Resolved Femtosecond Laser-Induced Desorption from Magnesium Oxide and Lithium Fluoride Single Crystals." Surface Science 451, no. 1-3:166-173. PNNL-SA-33218.

1999

  • Dawes M.L., W.P. Hess, Y. Kawaguchi, S.C. Langford, S.C. Langford, and J. Dickinson. 1999. "Laser-induced positive ion and neutral atom/molecule emissions from single-crystal CaHPO4 center dot 2H20: The role of electron-beam-induced defects." Applied Physics A, Materials Science and Processing 69. PNNL-SA-32881.
  • Hess W.P., A.G. Joly, K.M. Beck, R.M. Williams, and J. Dickinson. 1999. "Femtosecond Time-Resolved Laser Induced Desorption of Positive Ions from MgO." Applied Physics A, Materials Science and Processing 69. PNNL-SA-31434.
  • Joly A.G., K.M. Beck, and W.P. Hess. 1999. "Ultrafast and Nanosecond Laser Induced Desorption of Positive Ions from Lithium Fluoride Single Crystals." Applied Physics A, Materials Science and Processing 69. PNNL-SA-31435.
  • Rowland J.B., P.R. Winter, G. Ellison, J.G. Radziszewski, and W.P. Hess. 1999. "Photochemistry of Matrix-Isolated and Thin Film Acid Chlorides: Quantum Yields and Product Structures." Journal of Physical Chemistry A 103, no. 7:965-970. PNNL-SA-30320.

1998

  • Beck K.M., and W.P. Hess. 1998. "Quantum-State Resolved Products Via Vacuum Ultraviolet Photostimulated Desorption From Geologic Calcite." Applied Surface Science 127-129. PNNL-SA-28798.

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