PS-01:
In and ex situ (S)TEM manipulation of 2D materials without air exposure
Teaser:
Since 20 years, the 2D materials have provided headlines due to their extraordinary properties and application potential. In this presentation, it will be shown how their atomic structure can be tailored for applications avoiding oxidation and surface contamination.
PS-01:
TBA
Teaser:
TBA
PS-02:
The nature of diffuse scattering in FCC alloys – investigation by 3D-ED and 4D-STEM
Teaser:
Why do some FCC alloys show the presence of diffuse ‘spots’ between Bragg reflections at <111> and <112> zone axes? It is hypothesised that these ‘spots’ are the intersection of the Ewald sphere with <111>* reciprocal diffuse ‘rods’.
Evidence gathered by 3D-ED, 4D-STEM and other techniques is used to reveal the 3D ‘shape’ of the diffuse scattering and what can and cannot be causing this.
PS-02:
Sub-surface microstructural evolution during Rolling Contact Fatigue of bearing steels
Teaser:
The presentation will focus on the contribution of electron microscopy to the understanding of deformation and subsurface cracking mechanisms in martensitic bearing rings. Multi scale characterization were made using SEM, TEM, FIB imaging, and lead to new understanding on the crack initiation and propagation process.
PS-03:
Quantification of Potential Drops Across Semiconductor Heterointerfaces Using 4D-STEM: prospects and pitfalls
Teaser:
Spatially resolved, nano-to-micrometer-scale characterization of electric fields at materials interfaces is necessary for most electronic devices. We use the center-of-mass shift of the diffraction in a 4D STEM approach to quantify these fields in various semiconductor heterojunctions. The presentation will detail the optimization of the procedure and point out pitfalls and prospects of the technique.
PS-03:
In situ TEM study of phase and electronic structure transformations in amorphous Ga2O3
Teaser:
Gallium oxide (Ga2O3) is an advanced semiconductor material characterized by an exceptionally wide bandgap approximately 4.5 to 4.9 eV, depending on its concrete crystal phase and doping level.. Our talk will present a correlated perspective on the thermal treatments, gas environments, phase transformations and band gap shifts involved in pure and doped Ga2O3 using in situ gas and heating TEM.
PS-04:
Understanding and developing electrochemical energy systems
Teaser:
Uncover insights into sodium-based batteries, revealing metal formation and epitaxial deposition of Na on Zn substrates.
PS-04:
Following low and high-temperature electrolysis processes with in-situ and cryo electron microscopy
Teaser:
Hydrogen is the future. But how do we optimize Solid Oxide Fuel Cells and PEM electrolyzers for long-lasting performance? The answer lies in groundbreaking in-situ gas phase TEM and cryo microscopy.
PS-05:
PVA/PEG-based nanofibers with Au nanoparticles for treatment of chronic woundss
Teaser:
TBA
PS-05:
Nanoparticles and Catalysts
Teaser:
The function of catalysts operating under non-equilibrium conditions cannot be studied ex-situ. Reaction induced structural and chemical dynamics are linked to catalytic function and involve processes at different time- and length-scale. Multi-scale operando electron microscopy provides insights into coupled oscillatory behavior, phase cooperation and the role of active interfaces.
PS-06:
Geological Materials and Bio-mineral systems
Teaser:
Diverse geological solutions, from geothermal to CO2 storage, are pivotal for achieving Net Zero. Understanding mineral nucleation and growth processes in these systems is crucial for their long-term success. Advanced microanalytical techniques can reveal insights into these processes, helping to plan improved sustainable use Net Zero geological systems.
PS-07:
Probing the structure and dynamics of active molecular materials with cryo and liquid EM
Teaser:
Active molecular materials are in a constant state of disequilibrium,
but what are the structure and dynamics of these materials? Here, we show liquid and cryo EM data from chemically and electrochemically active materials under dissipative self-assembly conditions.
PS-08:
In-situ investigation of point defects in materials for spintronics using advanced electron probes.
Teaser:
TBA
PS-08:
Femtosecond extreme-ultraviolet imaging of magnetic domains during ultrafast demagnetization
Teaser:
TBA
PS-09:
Studying the crystallization of inorganic materials using correlated transmission electron microscopy by Brydson et al
Teaser:
A cautionary tale: the inorganic crystallization pathway observed using transmission electron microscopy
depends very sensitively on the sample preparation technique and/or in-situ method employed.
PS-10:
Visualizing electronic correlations in quantum materials at millikelvin temperatures
Teaser:
Millikelvin STM provides neat images (free of thermal noise) of electronic correlations, disorder and the real space atomic structure of quantum materials.
PS-11:
Exploring the dynamics of semiconductors with an ultrafast transmission electron
microscope
Teaser:
The development of time-resolved Cathodoluminescence (TR-CL) in a scanning electron microscope has enabled the measurement of the lifetime of excited states in semiconductors with a sub-wavelength spatial resolution [1]–[3]. While TRCL is usually done in a scanning electron microscope, the improvement of the spatial resolution and the combination with other electron-based spectroscopies offered by transmission electron microscopes has been a step forward for TR-CL [4], [5]. Our TRCL experiment are performed in a unique electron microscope, based on a cold-FEG electron gun [6]. This technology allows among other things to reach a spatial resolution of a few nanometers, essential for the study of III-V heterostructures.
In this presentation, for example, we will discuss the advantage and inconvenient of TRCL in a UTEM and present our results on the study of charge carrier dynamics in a 4 nm In0.3Ga0.7N/GaN quantum well. We studied the QW emission dynamic both along and across the quantum well and correlate the results with strain map and high resolution HADF images.
PS-12:
Pushing the limits of Coupled Extreme Environments during In-situ TEM
Teaser:
What is the physical limits for coupled in-situ experiments within a transmission electron microscope? The Tennessee Ion Beam Materials Laboratory is creating a new facility to test some of these limits by coupling ion irradiation, ion beam implantation, laser heating, gas injection, and other extreme environmental conditions.
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