A5074703772- Advanced Sensor and Energy Harvesting Materials
- Innovative Energy Harvesting Technologies
- Dielectric materials and actuators
- Advanced Materials and Mechanics
- Smart Materials for Construction
- Polymer composites and self-healing
- Mechanical Behavior of Composites
- Tribology and Wear Analysis
- Fiber-reinforced polymer composites
- Ferroelectric and Piezoelectric Materials
- Advanced Thermoelectric Materials and Devices
- Conducting polymers and applications
- Polymer Nanocomposites and Properties
- Surface Modification and Superhydrophobicity
- Nanomaterials and Printing Technologies
- Optical measurement and interference techniques
- Ultrasonics and Acoustic Wave Propagation
- Natural Fiber Reinforced Composites
- Graphene research and applications
- Electrospun Nanofibers in Biomedical Applications
- Flame retardant materials and properties
- Composite Material Mechanics
- Pickering emulsions and particle stabilization
- Vibration Control and Rheological Fluids
- Advanced MEMS and NEMS Technologies
University of Washington
2020-2024
Seattle University
2020-2023
Carnegie Mellon University
2018-2019
University of Michigan
2015-2018
Michigan United
2016-2018
Ann Arbor Center for Independent Living
2015-2016
Iran University of Science and Technology
2016
University of Florida
2012-2015
Abstract Coating inkjet‐printed traces of silver nanoparticle (AgNP) ink with a thin layer eutectic gallium indium (EGaIn) increases the electrical conductivity by six‐orders magnitude and significantly improves tolerance to tensile strain. This enhancement is achieved through room‐temperature “sintering” process in which liquid‐phase EGaIn alloy binds AgNP particles (≈100 nm diameter) form continuous conductive trace. Ultrathin hydrographically transferrable electronics are produced...
Stretchable high-dielectric-constant materials are crucial for electronic applications in emerging domains such as wearable computing and soft robotics. While previous efforts have shown promising architectures the form of dielectric nano-/microinclusions embedded stretchable matrices, limited mechanical compliance these significantly limits their practical application energy-harvesting/storage transducers actuators. Here, a class liquid metal (LM)-elastomer nanocomposites is presented with...
Abstract Elastomers embedded with droplets of liquid metal (LM) alloy represent an emerging class soft multifunctional composites that have potentially transformative impact in wearable electronics, biocompatible machines, and robotics. However, for these applications it is crucial LM alloys to remain during the entire service temperature range order maintain high mechanical compliance throughout duration operation. Here, LM‐based functional do not freeze stretchable at extremely low...
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...
The development of nanoscale reinforcements that can be used to improve the mechanical properties a polymer remains challenge due long-standing difficulties with exfoliation and dispersion existing materials. dissimilar chemical nature common nanofillers (e.g., carbon nanotubes, graphene) polymeric matrix materials is main reason for imperfect filler and, consequently, low performance their composites relative theoretical predictions. Here, aramid nanofibers are intrinsically dispersible in...
We introduce the first multifunctional material that simultaneously exhibits enhanced mechanical strength and embedded energy harvesting functionality.
Abstract Continuous powering of wearable electronics and personalized biomonitoring systems remains a great challenge. One promising solution is the use thermoelectric generators (TEGs) that convert body heat to electricity. These energy harvesters must conform curved surfaces minimize thermal barriers maintain efficiency while still exhibiting durability under large deformations. Here, highly efficient, stretchable made inorganic semiconductors printed multifunctional soft matter are...
Abstract Liquid metal polymer composites are an emerging class of functional materials with potentially transformative impacts in wearable electronics, soft robotics, and human‐computer interactions. By employing different processing methods, room temperature liquid inclusions can be embedded insulating polymers like elastomers to incorporate properties metals while the matrix remains stretchable. These solid–liquid offer interesting, yet complex multifunctional material system. In this...
This study presents an effective approach for producing FeN/GQDs nanozymes, mimicking natural enzymes. With a simplified and eco-friendly method, it achieves remarkable peroxide-like activity high sensitivity in glucose detection.
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...
Hybrid fiber reinforced composites using a nanoscale reinforcement of the interface have not reached their optimal performance in practical applications due to complex design and challenging assembly multiscale components. One promising approach fabrication hybrid is growth zinc oxide (ZnO) nanowire arrays on surface carbon fibers provide improved interfacial strength out plane reinforcement. However, this has been demonstrated mainly thus still requires processing conditions. Here we...
The first self-healing polymers and fiber reinforced composites with temperature stability beyond 240 °C high healing efficiencies are developed.
Piezoelectric nanocomposites are commonly used in the development of self-powered miniaturized electronic devices and sensors. Although incorporation one-dimensional (1D) piezoelectric nanomaterials (i.e., nanowires, nanorods, nanofibers) a polymer matrix has led to with promising energy harvesting sensing performance, they have not yet reached their ultimate performance due challenges fabrication. Here, direct-write additive manufacturing technique is utilized facilitate fabrication...
Lead-free piezoelectric nanowires (NWs) show strong potential in sensing and energy harvesting applications due to their flexibility ability convert mechanical electric energy. Currently, most lead-free NWs are produced through low yield synthesis methods result electromechanical coupling, which limit efficiency as harvesters. In order alleviate these issues, a scalable method is developed synthesize perovskite type 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 (BZT–BCT) with high coupling...
Sonication and mechanical shearing are scalable processes for creating liquid metal nanoparticles. Optimizing the involved processing parameters is crucial achieving desirable structure, surface properties applications of these
Piezoelectric materials are excellent candidates for use in energy harvesting applications due to their high electromechanical coupling properties that enable them convert input mechanical into useful electric power. The coefficient of the piezoelectric material is one most significant parameters affecting conversion and dependent on mode operation. In piezoceramics, d15 shear highest compared commonly used axial transverse modes utilize d33 d31 strain coefficients. However, complicated...
The use of piezoelectric materials for vibration energy harvesting at low frequencies is challenging and requires innovative structural design. Here, a flexible longitudinal zigzag structure developed to enhance low-frequency ambient vibrations. proposed composed orthogonal beams which enable in two directions. A theoretical model based on Euler–Bernoulli beam theory formulated study the dynamic response under free analysis demonstrates that operating can be obtained by increasing number of,...
Piezoelectric polymers, such as poly(vinylidene fluoride) (PVDF) and its copolymers, can achieve large strains high work density under external electrical fields. These materials are highly desirable in the development of electronic devices intelligent structures. Here, we demonstrate that dehydrofluorination (DHF) provide a versatile chemical modification PVDF homopolymer yields thermally stable ferroelectricity. The DHF process significantly increases fraction planar chain conformation...