352 citations · 791 across the 16 of their papers we have counts for
16 papers
Nanocrystal Geometry Governs Phase Transformation Pathways in Palladium Hydride
Daewon Lee, Sam Oaks-Leaf, Hyeonjong Ma +14
Pathways and structural dynamics of phase transformations impact performance of materials in energy and information storage technologies. Palladium hydride () nanoc…
New avenues for characterizing individual mineralized collagen fibrils with transmission electron microscopy
Tatiana Kochetkova, Stephanie M. Ribet, Lilian M. Vogl +5
Bone serves as a remarkable example of nature's architectured material with its unique blend of strength and toughness, all at a lightweight design. Given the hierarchical nature o…
Multi-angle precession electron diffraction (MAPED): a versatile approach to 4D-STEM precession
Stephanie M. Ribet, Rohan Dhall, Colin Ophus +1
Precession of a converged beam during acquisition of a 4D-STEM dataset improves strain, orientation, and phase mapping accuracy by averaging over continuous angles of illumination.…
In-situ Study of Understanding the Resistive Switching Mechanisms of Nitride-based Memristor Devices
Di Zhang, Rohan Dhall, Matthew M. Schneider +13
Interface-type resistive switching (RS) devices with lower operation current and more reliable switching repeatability exhibits great potential in the applications for data storage…
Atomic engineering of interfacial polarization switching in van der Waals multilayers
Madeline Van Winkle, Nikita Dowlatshahi, Nikta Khaloo +6
In conventional ferroelectric materials, polarization is an intrinsic property limited by bulk crystallographic structure and symmetry. Recently, it has been demonstrated that pola…
Design of Electrostatic Aberration Correctors for Scanning Transmission Electron Microscopy
Stephanie M. Ribet, Steven E. Zeltmann, Karen C. Bustillo +6
In a scanning transmission electron microscope (STEM), producing a high-resolution image generally requires an electron beam focused to the smallest point possible. However, the ma…
Multi-scale characterization of hexagonal Si-4H: a hierarchical nanostructured material
Silvia Pandolfi, Shiteng Zhao, John Turner +9
In this work we present a detailed structural characterization of Si-4H, a newly discovered bulk form of hexagonal silicon (Si) with potential optoelectronic applications. Using mu…
Tuning hole mobility of individual p-doped GaAs nanowires by uniaxial tensile stress
Lunjie Zeng, Jonatan Holmer, Rohan Dhall +3
Strain engineering provides an effective way of tailoring the electronic and optoelectronic properties of semiconductor nanomaterials and nanodevices, giving rise to novel function…
Temperature Driven Transformation of CsPbBr Nanoplatelets into Mosaic Nanotiles in Solution through Self-Assembly
Zhiya Dang, Balaji Dhanabalan, Andrea Castelli +9
Two-dimensional colloidal halide perovskite nanocrystals are promising materials for light emitting applications. In addition, they can be used as components to create a variety of…
py4DSTEM: a software package for multimodal analysis of four-dimensional scanning transmission electron microscopy datasets
Benjamin H Savitzky, Lauren A Hughes, Steven E Zeltmann +18
Scanning transmission electron microscopy (STEM) allows for imaging, diffraction, and spectroscopy of materials on length scales ranging from microns to atoms. By using a high-spee…
Probing collective oscillation of -orbital electrons at the nanoscale
Rohan Dhall, Derek Vigil-Fowler, J. Houston Dycus +5
Here we demonstrate that high energy electrons can be used to explore the collective oscillation of , , and orbital electrons at the nanometer length scale. Using epitaxi…
Charge Neutral MoS2 Field Effect Transistors Through Oxygen Plasma Treatment
Rohan Dhall, Zhen Li, Ewa Kosmowska +1
Lithographically fabricated MoS2 field effect transistors suffer from several critical imperfections, including low sub-threshold swings, large turn-on gate voltages (VT), and wide…
Scanning gate microscopy of ultra clean carbon nanotube quantum dots
Jiamin Xue, Rohan Dhall, Stephen B. Cronin +1
We perform scanning gate microscopy on individual suspended carbon nanotube quantum dots. The size and position of the quantum dots can be visually identified from the concentric h…
Black Arsenic-Phosphorus: Layered Anisotropic Infrared Semiconductors with Highly Tunable Compositions and Properties
Bilu Liu, Marianne Köpf, Ahmad A. Abbas +14
Two-dimensional (2D) layered materials with diverse properties have attracted significant interest in the past decade. The layered materials discovered so far have covered a wide,…
Probing thermal expansion of graphene and modal dispersion at low-temperature using graphene NEMS resonators
Vibhor Singh, Shamashis Sengupta, Hari S. Solanki +5
We use suspended graphene electromechanical resonators to study the variation of resonant frequency as a function of temperature. Measuring the change in frequency resulting from a…
Tuning mechanical modes and influence of charge screening in nanowire resonators
Hari S. Solanki, Shamashis Sengupta, Sajal Dhara +6
We probe electro-mechanical properties of InAs nanowire (diameter ~ 100 nm) resonators where the suspended nanowire (NW) is also the active channel of a field effect transistor (FE…