A5056485509- Advanced Sensor and Energy Harvesting Materials
- Advanced Materials and Mechanics
- Recycling and Waste Management Techniques
- Microplastics and Plastic Pollution
- Advanced Thermoelectric Materials and Devices
- Conducting polymers and applications
- Soft Robotics and Applications
- Dielectric materials and actuators
- Micro and Nano Robotics
- Tactile and Sensory Interactions
- Innovative Energy Harvesting Technologies
- Interactive and Immersive Displays
- Advanced Polymer Synthesis and Characterization
- Green IT and Sustainability
- Polymer composites and self-healing
Carnegie Mellon University
2020-2025
META Health
2024
University of Richmond
2020
Stretchable thermoelectric generators (TEGs) capable of harvesting electrical energy from body heat under cold weather conditions have the potential to make wearable electronic and robotic systems more lightweight portable by reducing their dependency on on-board batteries. However, progress depends integration soft conductive materials for robust wiring thermal management. The use thermally elastomers is especially important conforming body, absorbing heat, maintaining a temperature...
Liquid crystal elastomers (LCEs) have attracted tremendous interest as actuators for soft robotics due to their mechanical and shape memory properties. However, LCE typically respond thermal stimulation through active Joule heating passive cooling, which make them difficult control. In this work, LCEs are combined with soft, stretchable thermoelectrics create transducers capable of electrically controlled actuation, thermal-to-electrical energy conversion. The thermoelectric layers composed...
Liquid metal embedded elastomers (LMEEs) are composed of a soft polymer matrix with droplets alloys that liquid at room temperature. These matter composites exhibit exceptional combinations elastic, electrical, and thermal properties make them uniquely suited for applications in flexible electronics, robotics, management. However, the fabrication LMEE structures has primarily relied on rudimentary techniques limit patterning to simple planar geometries. Here, we introduce an approach direct...
Abstract As continuous wearable physiological monitoring systems become more ubiquitous in healthcare, there is an increasing need for power sources that can sustainably wireless sensors and electronics long durations. Wearable energy harvesting with thermoelectric generators (TEGs), which body heat converted to electrical energy, presents a promising way prolong operation address battery life concerns. In this work, high performance TEGs are introduced combine 3D printed elastomers liquid...
Abstract Future advanced wearable energy harvesters need to have high power densities, functionality under large deformations, scalability, and robust resistance against mechanical damages (i.e. fatigue, delamination, fracture). To achieve this, ultra-flexible, dielectric, thermally conductive materials along with deformable electrodes are needed. Here, we review recent progress in synthesis integration of liquid metal (LM) material architectures as the building blocks emerging harvesting...
Combining droplets of liquid metal (LM) with nanomaterials often introduces synergistic thermal or electrical properties that are not found in the constituent materials alone. However, these existing systems, LM maintain a statistically uniform dispersion and capable self-assembly aggregation. These composites limited by their need for high volume fractions (>60 vol %) to achieve properties, introducing leaking as drawback management wearable electronic applications. In this work, we show...
This paper proposes a new primitive that allows soft robots to be physically controlled in completely non-line-of-sight context using wireless energy - process we call actuation. Soft robots, which are composed entirely of materials and exclude any rigid components, highly flexible platforms can change their shape. considers specific class liquid-crystal elastomers (LCE) electronics-free engineered shape when heated 60 °C. Traditionally, such robotic systems must line-of-sight light source,...
The continuous accumulation of electronic waste is reaching alarming levels necessitating sustainable solutions to mitigate environmental impact. Fabrication the commercial substrates also requires high heat. As an alternative, we propose a series reprocessible based on photopolymerizable polyimides containing degradable ester linkages. We synthesize imide-containing diallyl monomers derived from readily available chemical feedstocks produce high-quality via rapid photopolymerization. Such...
Recent work on battery-free soft robotics has demonstrated the use of liquid crystal elastomers (LCE) to build shape-changing materials activated by applied external heat. However, sources heat must typically be in direct field-of-view robot (i.e. NIR, laser, and visual light EM or convective heats guns), tethered an power supply thermoelectric heating resistive joule heaters), require a heavy on-board battery that limits mobility range. This paper presents novel soft-robotics platform can...
Photopolymerizable and degradable polyimides from liquid resins were developed, using existing economic chemical feedstocks, as flexible substrates to mitigate the e-waste crisis.
Thermoelectric generators (TEGs) have received immense attention in the area of wearable electronics because they offer self-sustainable power sources. Regardless past advances thermoelectric generators, level flexibility and durability such devices has remained limited. Here, we present our recent work on TEGs based liquid metal (LM) composites that are utilized as thermal material interfaces. These multifunctional layers LM provide conformity with skin efficiently transfer body heat to...
Abstract Shape memory materials such as liquid crystal elastomers (LCE) have been explored soft robotic actuators due to their high mechanical robustness and muscle-like work densities. The main drawback of LCEs is slow response times low energy efficiencies stemming from poor thermal management. Thermoelectric devices (TED), which generate temperatures differentials across semiconductors through the Peltier effect when current applied, potential address these long times. By introducing...