Panoramic Mapping of Phonon Transport from Ultrafast Electron Diffraction and Scientific Machine Learning
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Materials"
DOI: 10.1002/adma.202206997
Abstract: One central challenge in understanding phonon thermal transport is a lack of experimental tools to investigate frequency‐resolved phonon transport. Although recent advances in computation lead to frequency‐resolved information, it is hindered by unknown defects in… read more here.
Keywords: ultrafast electron; transport; electron diffraction; phonon transport ... See more keywords
Quantitative Ultrafast Electron-Temperature Dynamics in Photo-Excited Au Nanoparticles.
Sign Up to like & getrecommendations! Published in 2021 at "Small"
DOI: 10.1002/smll.202100050
Abstract: The femtosecond evolution of the electronic temperature of laser-excited gold nanoparticles is measured, by means of ultrafast time-resolved photoemission spectroscopy induced by extreme-ultraviolet radiation pulses. The temperature of the electron gas is deduced by recording… read more here.
Keywords: temperature; quantitative ultrafast; photo; ultrafast electron ... See more keywords
Ultrafast electron diffraction study of single-crystal (EDO-TTF)2SbF6: Counterion effect and dimensionality reduction
Sign Up to like & getrecommendations! Published in 2017 at "Chemical Physics Letters"
DOI: 10.1016/j.cplett.2017.05.007
Abstract: Abstract Ultrafast electron diffraction is a sensitive tool to directly study molecular dynamics in structural detail. Here, we report the influence of counterion size on the photoinduced insulator-to-metal phase transition in two derivatives of the… read more here.
Keywords: reduction; counterion; edo ttf; diffraction ... See more keywords
Imaging surface acoustic wave dynamics in semiconducting polymers by scanning ultrafast electron microscopy.
Sign Up to like & getrecommendations! Published in 2018 at "Ultramicroscopy"
DOI: 10.1016/j.ultramic.2017.08.011
Abstract: Understanding the mechanical properties of organic semiconductors is essential to their electronic and photovoltaic applications. Despite a large volume of research directed toward elucidating the chemical, physical and electronic properties of these materials, little attention… read more here.
Keywords: microscopy; surface; surface acoustic; electron microscopy ... See more keywords
Concept and design of a beam blanker with integrated photoconductive switch for ultrafast electron microscopy.
Sign Up to like & getrecommendations! Published in 2018 at "Ultramicroscopy"
DOI: 10.1016/j.ultramic.2017.10.002
Abstract: We present a new method to create ultrashort electron pulses by integrating a photoconductive switch with an electrostatic deflector. This paper discusses the feasibility of such a system by analytical and numerical calculations. We argue… read more here.
Keywords: photoconductive switch; microscopy; ultrafast electron; electron ... See more keywords
Simultaneous observation of ultrafast electron and proton beams in TNSA
Sign Up to like & getrecommendations! Published in 2020 at "High Power Laser Science and Engineering"
DOI: 10.1017/hpl.2020.19
Abstract: The interaction of ultra-intense high-power lasers with solid-state targets has been largely studied for the past 20 years as a future compact proton and ion source. Indeed, the huge potential established on the target surface… read more here.
Keywords: high power; simultaneous observation; proton; observation ultrafast ... See more keywords
Imaging Coherent Structural Dynamics with Ultrafast Electron Microscopy
Sign Up to like & getrecommendations! Published in 2018 at "Microscopy and Microanalysis"
DOI: 10.1017/s1431927618009674
Abstract: Development of ultrafast electron and X-ray scattering methods has enabled direct routes to probing atomic-scale structural dynamics [1,2]. This in turn has led to new insight into lattice responses to a variety of dynamic processes… read more here.
Keywords: coherent structural; microscopy; imaging coherent; structural dynamics ... See more keywords
Relativistic Ultrafast Electron Diffraction of Nanomaterials
Sign Up to like & getrecommendations! Published in 2020 at "Microscopy and Microanalysis"
DOI: 10.1017/s1431927620015494
Abstract: Dynamical ultrafast studies are increasingly becoming relevant for distinguishing nanoscale heterogeneity and probing nanoscale features, whether by full-field imaging or scanning nanoprobes. Relativistic ultrafast electron diffraction (UED) is well-suited for structural dynamics studies, allowing transmission… read more here.
Keywords: diffraction nanomaterials; electron; relativistic ultrafast; electron diffraction ... See more keywords
Imaging the Reduction of Electron Trap States in Shelled Copper Indium Gallium Selenide Nanocrystals Using Ultrafast Electron Microscopy
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Physical Chemistry C"
DOI: 10.1021/acs.jpcc.8b03872
Abstract: Insertion of alkali metal ions, especially Na, is a well-established method to significantly increase the power conversion efficiency of copper indium gallium selenide (CIGSe)-based photovoltaic devices. However, although it is known that Na ions mostly… read more here.
Keywords: microscopy; ultrafast electron; copper indium; gallium selenide ... See more keywords
Transient Strain-Induced Electronic Structure Modulation in a Semiconducting Polymer Imaged by Scanning Ultrafast Electron Microscopy.
Sign Up to like & getrecommendations! Published in 2021 at "Nano letters"
DOI: 10.1021/acs.nanolett.1c02963
Abstract: Understanding the optoelectronic properties of semiconducting polymers under external strain is essential for their applications in flexible devices. Although prior studies have highlighted the impact of static and macroscopic strains, assessing the effect of a… read more here.
Keywords: microscopy; ultrafast electron; electron microscopy; scanning ultrafast ... See more keywords
Attosecond photonics: Imaging ultrafast electron dynamics
Sign Up to like & getrecommendations! Published in 2017 at "Nature Photonics"
DOI: 10.1038/nphoton.2017.97
Abstract: A feasible route towards electron microscopy at the attosecond timescale is now possible thanks to the implementation of an optical gating approach. read more here.
Keywords: electron dynamics; photonics imaging; imaging ultrafast; attosecond photonics ... See more keywords