A5083455397- Mechanical and Optical Resonators
- Microstructure and mechanical properties
- Advanced MEMS and NEMS Technologies
- Metal and Thin Film Mechanics
- 2D Materials and Applications
- Aluminum Alloys Composites Properties
- Acoustic Wave Resonator Technologies
- Composite Structure Analysis and Optimization
- Advanced Surface Polishing Techniques
- Force Microscopy Techniques and Applications
- Aeroelasticity and Vibration Control
- Surface Treatment and Residual Stress
- Structural Analysis and Optimization
- Graphene research and applications
- Advanced materials and composites
- Concrete Corrosion and Durability
- MXene and MAX Phase Materials
- Perovskite Materials and Applications
- Semiconductor materials and interfaces
- Integrated Circuits and Semiconductor Failure Analysis
- Elasticity and Material Modeling
- Carbon Nanotubes in Composites
- Nanowire Synthesis and Applications
- Boron and Carbon Nanomaterials Research
- Ultrasonics and Acoustic Wave Propagation
University of Tehran
2010-2024
Georgia Institute of Technology
2012-2021
Northwestern University
2018
A unique technique to perform quantitative in situ transmission electron microscopy (TEM) fatigue testing on ultrathin films and nanomaterials is demonstrated. The relies a microelectromechanical system (MEMS) device actuate nanospecimen measure its mechanical response. Compared previously demonstrated MEMS-based TEM techniques, the takes advantage of two identical capacitive sensors each side specimen electronically elongation (with nm resolution) applied force μN resolution). Monotonic...
This study unveils the stress relaxation transient deformation mechanisms in 100 nm-thick, nanocrystalline Au films thanks to a robust quantitative situ TEM MEMS nanomechanical testing approach quantify and perform observations of time-dependent ultrathin films. The is characterized by decrease plastic strain rate more than one order magnitude over first ∼30 minutes (from 10−4 less 10−5 s−1). For longer experiments, decreases down 10−7 s−1 after several hours. power-law exponent n, relating...
Based on the theory of elasticity, exact analytical and numerical solutions piezoelectric rods under static torsion are studied. In this paper, direct solution method is used. The main scope to check extension validity assumptions in previous papers that had been made based linear distribution electric potential through cross section their influences deflection angle rotation. Stress induction functions employed obtain electrostatic equilibrium equations torsional loading. It shown valid...
Molybdenum diselenide (MoSe 2 ) is attracting great attention as a transition metal dichalcogenide (TMDC) due to its unique applications in micro-electronics and beyond.
Two-dimensional polymorphic transition-metal dichalcogenides have drawn attention for their diverse applications. This work explores the complex interplay between strain-induced phase transformation and crack growth behavior in annealed nanocrystalline MoS2. Employing molecular dynamics (MD) simulations, this research focuses on effect of grain size, misorientation, annealing evolution effects mechanical First, examining monocrystalline MoS2 under various stress states reveals distinct...
This paper investigates the compound effect of shear and squeeze energy dissipation mechanisms for a silicon lateral micro-resonator with complex geometry in different environmental conditions using 3D computational fluid dynamics (CFD) model compares it to experimental measurements. shows higher accuracy compared previous works as analysis takes into account squeezing at same time. The results highlight that each fluid-induced mechanism depends on thermophysical properties (temperature,...