A5030349013- Advanced Electron Microscopy Techniques and Applications
- Force Microscopy Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Near-Field Optical Microscopy
- Surface and Thin Film Phenomena
- Electronic and Structural Properties of Oxides
- Magnetic properties of thin films
- Metabolomics and Mass Spectrometry Studies
- Laser Material Processing Techniques
- Thermography and Photoacoustic Techniques
- Chemical Safety and Risk Management
- Integrated Circuits and Semiconductor Failure Analysis
- Magneto-Optical Properties and Applications
- High-pressure geophysics and materials
- Photorefractive and Nonlinear Optics
- Molecular spectroscopy and chirality
- Risk and Safety Analysis
- Occupational Health and Safety Research
- Analytical Chemistry and Chromatography
- Physics of Superconductivity and Magnetism
- Ion-surface interactions and analysis
- Phase-change materials and chalcogenides
- Organic and Molecular Conductors Research
- Advanced Fluorescence Microscopy Techniques
- Pulsed Power Technology Applications
Brookhaven National Laboratory
2022-2025
University of Minnesota
2018-2021
Ripon College
2014-2019
The structural anisotropy of layered materials leads to disparate lattice responses along different crystallographic directions following femtosecond photoexcitation. Ultrafast scattering methods are well-suited resolving such responses, though probe size and specimen structure morphology must be considered when interpreting results. Here we use ultrafast electron microscopy (UEM) imaging diffraction study the influence individual multilayer terraces few-layer step-edges on acoustic-phonon...
The Joint Safety Team (JST) was conceived in 2012 by the Departments of Chemical Engineering and Materials Science Chemistry at University Minnesota Dow Company as a model student-led safety organization. JST initiative aimed improving academic through four core areas: compliance, awareness, resources, education. Since its inception, has taken great strides to develop culture peer-led Minnesota. We describe evolution structure organization over last 8 years innovative methodologies employed...
While lab accidents that involved personal injuries or significant property damage are required to be reported by law, many minor incidents near misses less frequently reported, especially in an academic research environment. However, public awareness of these stories and create valuable learning opportunities can prevent similar mishaps from happening the future. Inspired a miss reporting system Dow Chemical Company, University Minnesota Joint Safety Team, student-led safety initiative...
Ultrafast manipulation of phase domains in quantum materials is a promising approach to unraveling and harnessing interwoven charge lattice degrees freedom. Here we find evidence for coupling displacively excited coherent acoustic phonons (CAPs) periodic distortions (PLDs) the intensely studied charge-density-wave material, 1T-TaS2, using 4D ultrafast electron microscopy (UEM). Initial photoinduced Bragg-peak dynamics reveal partial CAP coherence localized c-axis dilations. Weak, partially...
This protocol describes an approach to preparing a series of Gaussian 09 computational input les for ensemble conformers generated in Spartan'14.The resulting are necessary computing optimum geometries, relative conformer energies, and NMR shielding tensors using Gaussian.Using the conformational search feature within Spartan'14, isomers was obtained.To convert structures into format that is readable by 09, were rst exported single ".sdf" le.A Python script used \(i) read structural...
<title>Abstract</title> This protocol describes an approach to preparing a series of Gaussian 09 computational input files for ensemble conformers generated in Spartan’14. The resulting are necessary computing optimum geometries, relative conformer energies, and NMR shielding tensors using Gaussian. Using the conformational search feature within Spartan’14, isomers was obtained. To convert structures into format that is readable by 09, were first exported single “.sdf” file. A Python script...
Ultrafast photoexcitation of transition metal dichalcogenides (TMDs) has been shown with ultrafast electron microscopy (UEM) imaging to produce coherent intra and interlayer low-frequency acoustic phonons that propagate along preferential wavevectors at the in-plane c-axis speeds sound [1][2][3][4].In defect-laden crystals, were found preferentially emerge from abrupt extended crystal-crystal crystal-vacuum interfaces.For certain morphologies structural configurations, wave interference...
We provide here a description of basic, entry-level method and user interface for automating ultrafast electron microscopy (UEM) experiments. access to the source code scripts via GitHub site ease implementation or as starting reference point those entering seeking enter field. Core instrumentation physical connections in UEM lab at Minnesota are described. An application designed programmed with C++/CLI Windows Forms Microsoft Visual Studio - dubbed UEMtomaton is also presented. It our hope...
Journal Article Advancements in UltraFast Electron Microscopy Get access Darrin Leonhardt, Leonhardt Euclid Techlabs, LLC, Beltsville, MD, USA Corresponding author: d.leonhardt@euclidtechlabs.com Search for other works by this author on: Oxford Academic Google Scholar Eric Montgomery, Montgomery Chunguang Jing, Jing Bolingbrook, IL, Bart Wyderski, Wyderski Yubin Zhao, Zhao Spencer Reisbick, Reisbick Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory,...
Journal Article Vanadium Dioxide Metal Insulator Transition Characterization with In-situ Radio Frequency Excitation Using Ultrafast Transmission Electron Microscopy Get access A Pofelski, Pofelski Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY, USA Search for other works by this author on: Oxford Academic Google Scholar C Liu, Liu S Reisbick, Reisbick M G Han, Han Y Zhu Microanalysis, Volume 29, Issue Supplement_1, 1 August 2023, Page...
Ultrafast electron microscopy (UEM) is a growing field dedicated to exploring nanoscale dynamics with extraordinary spatiotemporal resolution as small angstrom-femtosecond [1][2][3][4][5].All disciplines, techniques and personnel are prone human error even at levels that require the highest precision care [6].Especially in science, new careful implementation prevent errors including researcher bias, analysis artifacts instrumentation setup.The extensive time required capture an entire UEM...
Radio frequency (RF) ranging from 20kHz to 300 GHz has numerous applications including radio transmission, long distance communication and wireless network technologies.RF signals are also playing a crucial role in spintronics quantum information science used spin nano-oscillators, superconducting NV center qubits, other emerging technologies.However, until now RF inaccessible TEM with commercial biasing sample holders.High can be reflected or absorbed by the electrical reactance resistance...
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We provide here a description of basic, entry-level method and user interface for automating ultrafast electron microscopy (UEM) experiments. access to the source code scripts via GitHub site ease implementation or as starting reference point those entering seeking enter field. Core instrumentation physical connections in UEM lab at Minnesota are described. An application designed programmed with C++/CLI Windows Forms Microsoft Visual Studio - dubbed UEMtomaton is also presented. It our hope...