191 citations · 588 across the 17 of their papers we have counts for
17 papers
Scalable and deterministic construction of moiré superlattice in 2D materials using stressor films
Yu-Mi Wu, Sihun Lee, Yufeng Xi +6
Moiré superlattice in two-dimensional (2D) materials provides a powerful platform to engineer emergent electronic states, yet the construction of moiré superlattices remains lab-sc…
Strain-induced Moiré Reconstruction and Memorization in Two-Dimensional Materials without Twist
Nazmul Hasan, Tara Peña, Aditya Dey +7
Two-dimensional (2D) materials with a twist between layers exhibit a moiré interference pattern with larger periodicity than any of the constituent layer unit cells. In these syste…
Subsurface pulse, crater and ejecta asymmetry from oblique impacts into granular media
Bingcheng Suo, A. C. Quillen, Max Neiderbach +9
We carry out experiments of 104 m/s velocity oblique impacts into a granular medium (sand). Impact craters have nearly round rims even at a grazing angle of about , howev…
Strain Engineering for High-Performance Phase Change Memristors
Wenhui Hou, Ahmad Azizimanesh, Aditya Dey +7
A new mechanism for memristive switching in 2D materials is through electric-field controllable electronic/structural phase transitions, but these devices have not outperformed sta…
Froude number scaling unifies impact trajectories into granular media across gravitational conditions
Peter M. Miklavcic, Ethan Tokar, Esteban Wright +4
The interactions of solid objects with granular media is countered by a resistance force that stems from frictional forces between the grains and the media's resistance to inertia…
Variability estimation in a non-linear crack growth simulation model with controlled parameters using Designed Experiments testing
Seungju Yeoa, Paul Funkenbuscha, Hesam Askari
Variability in multiple independent input parameters makes it difficult to estimate the resultant variability in the system's overall response. The Propagation of Errors and Monte-…
An atomistic insight into moiré reconstruction in Twisted Bilayer Graphene beyond the magic angle
Aditya Dey, Shoieb Ahmed Chowdhury, Tara Peña +3
Twisted bilayer graphene exhibits electronic properties that are highly correlated with the size and arrangement of moiré patterns. While rigid rotation of two layers creates the t…
Moiré Engineering in 2D Heterostructures with Process-Induced Strain
Tara Peña, Aditya Dey, Shoieb A. Chowdhury +6
We report deterministic control over moiré superlattice interference pattern in twisted bilayer graphene by implementing designable device-level heterostrain with process-induced s…
Surface particle motions excited by a low velocity normal impact into a granular medium
Max Neiderbach, Bingcheng Suo, Esteban Wright +5
In laboratory experiments, high speed videos are used to detect and track mm-size surface particle motions caused by a low velocity normal impact into sand. Outside the final crate…
Sub-surface granular dynamics in the context of oblique, low-velocity impacts into angular granular media
Peter M. Miklavčič, Hesam Askari, Paul Sánchez +2
Oblique, low-velocity impacts onto extraterrestrial terrain are an inevitable occurrence during space exploration. We conduct two-dimensional discrete simulations to model such imp…
Ricochets on Asteroids II: Sensitivity of laboratory experiments of low velocity grazing impacts on substrate grain size
Esteban Wright, Alice C. Quillen, Paul Sanchez +4
We compare low velocity impacts that ricochet with the same impact velocity and impact angle into granular media with similar bulk density, porosity and friction coefficient but di…
Strain Engineering 2D MoS with Thin Film Stress Capping Layers
Tara Peña, Shoieb A. Chowdhury, Ahmad Azizimanesh +3
We demonstrate a method to induce tensile and compressive strain into two-dimensional transition metal dichalcogenide (TMDC) MoS via the deposition of stressed thin films to…
Ricochets on Asteroids: Experimental study of low velocity grazing impacts into granular media
Esteban Wright, Alice Quillen, Juiliana South +6
Spin off events and impacts can eject boulders from an asteroid surface and rubble pile asteroids can accumulate from debris following a collision between large asteroids. These pr…
Strain-Based Room-Temperature Non-Volatile MoTe Ferroelectric Phase Change Transistor
Wenhui Hou, Ahmad Azizimanesh, Arfan Sewaket +5
The primary mechanism of operation of almost all transistors today relies on electric-field effect in a semiconducting channel to tune its conductivity from the conducting 'on'-sta…
A Light-weight Vibrational Motor Powered Recoil Robot that Hops Rapidly Across Granular Media
Alice C. Quillen, Randal C. Nelson, Hesam Askari +3
A 1 cm coin vibrational motor fixed to the center of a 4 cm square foam platform moves rapidly across granular media (poppy seeds, millet, corn meal) at a speed of up to 30 cm/s, o…
A coin vibrational motor swimming at low Reynolds number
Alice C. Quillen, Hesam Askari, Douglas H. Kelley +2
Low-cost coin vibrational motors, used in haptic feedback, exhibit rotational internal motion inside a rigid case. Because the motor case motion exhibits rotational symmetry, when…
Intrusion in heterogeneous materials: Simple global rules from complex micro-mechanics
Hesam Askari, Ken Kamrin
The interaction of intruding objects with deformable materials is a common phenomenon, arising in impact and penetration problems, animal and vehicle locomotion, and various geo-sp…