Wayne Hess

Mechanisms of laser and electron beam modifications of wide bandgap single crystal surfaces

Lead Institution

Washington State University

Principal Investigator

J. Dickinson

Project type

Large-Scale EMSL Research

We propose to use EMSL capabilities to examine the nanometer scale modifications of wide bandgap single crystal surfaces exposed to UV laser and keV electron beam radiation. Previous work has shown…

Raman, Photoemission Electron Microscopy and Laser Desorption of Plasmonic Metal Nanostructures and Hybrid Metal - Insulator Photoemitters

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Patrick El-Khoury

The goal of this proposal is to measure structurally-dependent electronic bulk and surface dynamics of electrons, holes, and excitons, on different but well-characterized hybrid materials, using…

Ultrafast Laser Interactions with Wide Bandgap Materials

Lead Institution

Washington State University

Principal Investigator

J. Dickinson

Project type

Large-Scale EMSL Research

Laser interactions with nominally transparent (wide bandgap) materials are playing increasingly important roles in several technologies and applications, including chemical analysis, semiconductor…

Combined Theoretical and Experimental Studies of Laser Desorption from Metal Oxide Surfaces

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Petr Sushko

Project type

Large-Scale EMSL Research

Laser ablation and desorption techniques are used to produce novel materials, perform sophisticated chemical analysis, and modify nanostructured materials. Although laser ablation/desorption…

Photoemission Electron Microscopy of Small Polaron Formation on NaCl Islands on Cu (111)

Lead Institution

University of Minnesota

Principal Investigator

Xiaoyang Zhu

Project type

Large-Scale EMSL Research

Our recent paper describes the time-dependence of small polaron formation at the interface of a metal insulator system. This result is unique in that the observed interfacial polaron formation has…

Laser Desorption from Metal Oxides and Two-photon Photoemission Electron Microscopy

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Wayne Hess

Laser interactions with nominally transparent (wide bandgap) materials are playing increasingly important roles in several technologies and applications, including chemical analysis, semiconductor…

Quantitative Characterization of Surface Plasmon-Enhanced Electromagnetic Fields on Ag Nanostructures by Two-photon Photoemission Electron Microscopy

Lead Institution

University of Florida

Principal Investigator

Wei Wei

Project type

Large-Scale EMSL Research

Achieving a precise correlation between the localized optical properties and the local geometry of nanostructures will significantly advance the understanding of the nature and origin of nano…

Analysis of Spent Free Electron Laser Photocathodes

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Wayne Hess

Project type

Limited Scope

This project will use existing capabilities to characterize expired photocathode materials. We will conduct post-mortem investigations of used (expired) photocathodes from JLab to determine…

Light Source Photocathode Performance and Development

Lead Institution

Environmental Molecular Sciences Laboratory

Principal Investigator

Theva Thevuthasan

Accelerator photocathode technology must be advanced to meet the needs of fourth generation light sources. The ultimate output characteristics and cost of next generation UV or X-ray sources, whether…

Mechanisms of Laser Desorption of Metal Oxide Nanocrystals

Lead Institution

University College London

Principal Investigator

Alexander Shlyuger

Project type

Exploratory Research

Laser-induced ablation, desorption and chemical activation techniques form the basis of unique methods for producing novel materials, inducing new chemical functionalities, performing sophisticated…

Excitation and Desorption of Nano-crystalline ZrO2

Lead Institution

University College London

Principal Investigator

Alexander Shlyuger

Project type

Large-Scale EMSL Research

This project is focused on integrated theoretical and experimental studies of the interaction of light with nanoscale oxide materials of fundamental interest to the fields of photo-catalysis,…

Study of Martensitic Transformations in Shape Memory Alloys by Real-time Measurement of Surface Work Function Change

Lead Institution

Washington State University

Principal Investigator

Mingdong Cai

Project type

Exploratory Research

Shape memory alloys (SMA) belong to the advanced intelligent materials, the properties of which can be programmed to carry out a required action. The alloys exhibit reversible shape changes (i.e…

Light Source Photocathode Performance and Development

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Wayne Hess

Project type

Exploratory Research

Accelerator photocathode technology must be advanced to meet the needs of fourth generation light sources. The ultimate output characteristics and cost of next-generation ultraviolet or x-ray…

Photoelectron emission microscopy (PEEM) study of Cu nanoparticles on TiO2(110)

Lead Institution

Environmental Molecular Sciences Laboratory

Principal Investigator

Kenneth Beck

Project type

Exploratory Research

The growth of metals on oxide surface is interested in a number of technological applications, including heterogeneous catalysis, electronic devices and gas sensing. Specifically, metal islands…

Influence of Phase-Changing Medium on Surface-Enhanced Electromagnetic Fields and Coherence Lifetime of Active Plasmonic Nanostructures

Lead Institution

Vanderbilt University

Principal Investigator

Richard Haglund

Project type

Large-Scale EMSL Research

The miniaturization of photonic circuits is critical to 21st century data processing and telecommunication technologies. Plasmonics, based on the optical properties of metallic nanostructures, holds…

Study of Martensitic Transformations in Shape Memory Alloys by Real-time Measurement of Surface Work Function Change

Lead Institution

Washington State University

Principal Investigator

J. Dickinson

Project type

Exploratory Research

Shape memory alloys (SMA) belong to the advanced intelligent materials, the properties of which can be programmed to carry out a required action. The alloys exhibit reversible shape changes (i.e…

Light Source Photocathode Performance and Development

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Wayne Hess

Accelerator photocathode technology must be advanced to meet the needs of fourth generation light sources. The ultimate output characteristics and cost of next generation UV or X-ray sources, whether…

Laser Desorption from Metal Oxides (Kay's BES-Surface Kinetics, PNNL Scope #16248)

Lead Institution

University College London

Principal Investigator

Alexander Shlyuger

Project type

Exploratory Research

Laser ablation and desorption techniques form the basis of unique methods for producing novel materials, performing sophisticated chemical analysis or medical procedures. Although laser ablation…

Laser-Materials Interactions: Theory and Experiment (Kay's BES-Surface Kinetics, PNNL Scope #16248)

Lead Institution

University College London

Principal Investigator

Alexander Shlyuger

Project type

Exploratory Research

Laser ablation and desorption techniques form the basis of unique methods for producing novel materials, performing sophisticated chemical analysis or medical procedures. Although laser ablation…

Laser Desorption from Metal Oxides

Lead Institution

University College London

Principal Investigator

Alexander Shlyuger

Project type

Large-Scale EMSL Research

This proposal is a continuation of research under EMSL User Proposal #21794. Laser ablation and desorption techniques form the basis of unique methods for producing novel materials, performing…

Laser Desorption, Raman, Photoemission and Electron Microscopy of Hybrid Metal - Insulator Nanostructures

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Wayne Hess

The details of how photons couple to wide bandgap materials and the consequences of these excitations such as particle emission and field enhancement are playing increasingly important roles in…

Interfacial Excited State Dynamics on TiO2

Lead Institution

Osaka University

Principal Investigator

Katsumi Tanimura

Project type

Large-Scale EMSL Research

Interfacial excited state dynamics (ESD) plays an important role in many chemical and biological processes. Specifically, interfacial ESD in TiO2-based materials, is critical to solar energy…

Raman, Photoemission Electron Microscopy and Laser Desorption of Plasmonic Metal Nanostructures

and Hybrid Metal - Insulator Photoemitters

Lead Institution

Pacific Northwest National Laboratory

Principal Investigator

Wayne Hess

The goal of this proposal is to measure structurally-dependent electronic bulk and surface dynamics of electrons, holes, and excitons, on different but well-characterized hybrid materials, using…

Projects