A5004852847- Electrochemical sensors and biosensors
- Advancements in Semiconductor Devices and Circuit Design
- Nanowire Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Neuroscience and Neural Engineering
- Semiconductor materials and devices
- Force Microscopy Techniques and Applications
- Advanced MEMS and NEMS Technologies
- Vibration and Dynamic Analysis
- Plasma Diagnostics and Applications
- Advanced Surface Polishing Techniques
- biodegradable polymer synthesis and properties
- Chemical Synthesis and Analysis
- Integrated Circuits and Semiconductor Failure Analysis
- Click Chemistry and Applications
- Electrohydrodynamics and Fluid Dynamics
- Mechanical and Optical Resonators
- Electromagnetic Simulation and Numerical Methods
- Diamond and Carbon-based Materials Research
- Analytical Chemistry and Sensors
- Electronic and Structural Properties of Oxides
Virginia Commonwealth University
2020-2025
Abstract Cryogenic deep reactive ion etching (Cryo DRIE) of silicon has become an enticing but challenging process utilized in front-end fabrication for the semiconductor industry. This method, compared to Bosch process, yields vertical etch profiles with smoother sidewalls not subjected scalloping, which are desired many microelectromechanical systems (MEMS) applications. Smoother enhance electrical contact by ensuring more conformal and uniform sidewall coverage, thereby increasing...
Abstract We measure the stiction force using in-plane electrostatically actuated Si nanoelectromechanical cantilever relays with Pt contacts. The average current-dependent values of force, ranging from 60 nN to 265 nN, were extracted I DS vs V GS hysteresis curves, displacement information finite element method (Comsol Multiphysics) simulations, and distribution determined an analytical model. It is shown that inversely directly proportional contact resistance ( R c ) drain-source current ),...
Nano electro-mechanical systems (NEMS) based combinational logic circuits have garnered attention as possible replacements for electronic in safety critical environments where conditions make the use of electronics non-ideal. The principal advantages NEMS are inherent near zero leakage current and ability to operate harsh substantial parasitic field effects present. In this work, we design experimentally demonstrate gates which utilize multi-gate relays, designed actuate when input signals...
Wearable biosensors for continuous health monitoring, particularly those used glucose detection, have a limited operational lifetime due to biodegradation and fouling. As result, patients must change sensors frequently, increasing cost patient discomfort. Arrays of multiple sensors, where the individual devices can be activated on demand, increase overall longevity, thereby reducing improving outcomes. This work demonstrates feasibility this approach via decomposition combustible...
Abstract A thorough understanding of arc discharge mechanism as well determination voltage at the nanometer scale remains challenging due to complexities associated with electrode preparation and precisely maintaining nanoscale separations in experiments. This work addresses this challenge through a novel approach by accurately measuring electric breakdown/discharge voltages between Pt-coated Si electrodes ranging from ∼5 nm 370 using combination fixed flexible nano-electrodes while...
Implantable or subcutaneous biosensors used for continuous health monitoring have a limited functional lifetime which requires frequent replacement and therefore may be highly discomforting to the patient become costly. One possible solution this problem is use of biosensor arrays where each individual reserve sensor can activated on-demand when previous one becomes inoperative due biofouling enzyme degradation. Each in array housed an individiual Polydimethylsiloxane (PDMS) well protected...