A5014668277- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Tactile and Sensory Interactions
- Dysphagia Assessment and Management
- Dielectric materials and actuators
- Optical Imaging and Spectroscopy Techniques
- Thermography and Photoacoustic Techniques
- Photoacoustic and Ultrasonic Imaging
- Voice and Speech Disorders
- Child Nutrition and Feeding Issues
- Tracheal and airway disorders
- Inhalation and Respiratory Drug Delivery
- Chronic Obstructive Pulmonary Disease (COPD) Research
- Photovoltaic Systems and Sustainability
- Interactive and Immersive Displays
- Recycling and Waste Management Techniques
- Neuroscience and Neural Engineering
- Organic Electronics and Photovoltaics
- Respiratory Support and Mechanisms
University of California, San Diego
2020-2024
Electrotactile stimulus is a form of sensory substitution in which an electrical signal perceived as mechanical sensation. The electrotactile effect could, principle, recapitulate range tactile experience by selective activation nerve endings. However, the method has been plagued inconsistency, galvanic reactions, pain and desensitization, unwanted stimulation nontactile nerves. Here, we describe how soft conductive block copolymer, stretchable layout, concentric electrodes, along with...
Stretchable conductors expand the interfaces with biological structures.
Abstract Swallowing is an ensemble of voluntary and autonomic processes key to maintaining our body’s homeostatic balance. Abnormal swallowing (dysphagia) can cause dehydration, malnutrition, aspiration pneumonia, weight loss, anxiety, or even mortality—especially in older adults—by airway obstruction. To prevent mitigate these outcomes, it imperative regularly assess ability those who are at risk developing dysphagia already diagnosed with it. However, current diagnostic tools such as...
Abstract The generation of pressure perturbations in matter stimulated by pulsed light is a method widely recognized as the photoacoustic or light‐induced thermoelastic effect. In series psychophysical experiments, robustness tactile perception generated with variety sources examined: diverging laser used for tomography optical parameter oscillation (OPO), miniature diode (MDL), and commercial digital processing (DLP) projector. It demonstrated that participants can accurately detect,...
Abstract A type of haptic device is described that delivers two modes stimulation simultaneously and at the same location on skin. The are mechanical (delivered pneumatically by inflatable air pockets embedded within a silicone elastomer) electrical conductive polymer). key enabling aspect this work use highly plasticized polymer based poly(3,4‐ethylenedioxythiphene) (PEDOT) blended with elastomeric polyurethane (PU). To fabricate “electropneumotactile” device, polymeric electrodes overlaid...
Abstract This study investigates the perception of tactile wetness, a complex sensation experienced by humans. Previous research has primarily focused on either thermal or mechanical cues separately, used textiles as stimuli whose parameters are difficult to control. Here, we employed polyacrylamide hydrogels with varying stiffness levels soaked in liquids distinct conductivities. By psychophysically evaluating participants’ showed that wetness judgments for samples exhibit transitive...
Abstract Epidermal sensors for remote healthcare and performance monitoring require the ability to operate under effects of bodily motion, heat, perspiration. Here, use purpose‐synthesized polymer‐based dry electrodes graphene‐based strain gauges obtain measurements swallowed volume typical conditions exercise is evaluated. The electrodes, composed common conductive polymer poly(3,4 ethylenedioxythiophene) (PEDOT) electrostatically bound poly(styrenesulfonate)‐b‐poly(poly(ethylene glycol)...
Abstract In this work, a portable venturi tube capable of measuring bidirectional respiratory flow is developed and correlated the measurements to pulmonary function. Pressure signals are transduced using flexible compressible capacitive foam sensors embedded into wall device. configuration, able provide differential pressure readings, from which airflow rate passing through could be extrapolated. Utilizing effect, geometry spirometer designed finite element analysis measure during...
Achieving a net-zero emissions economy by 2050 requires immediate and accelerated growth of solar photovoltaics within the next decade. However, projected silver consumption needed for this is unsustainable. Here, we use poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), conducting conjugated polymer, as an intrinsically conductive adhesive (ICA) to replace silver-based electrically adhesives (ECAs) interconnect shingled modules. Solar cells with PEDOT:PSS-based ICAs have...
Background Frequent sensor-assisted monitoring of changes in swallowing function may help improve detection radiation-associated dysphagia before it becomes permanent. While our group has prototyped an epidermal strain/surface electromyography sensor that can detect minute muscle movement, is unknown whether patients with head and neck cancer would be willing to wear such a device at home after radiation for several months. Objective We iteratively assessed patients’ design preferences...
Abstract The photoacoustic effect refers to the generation of pressure waves in matter stimulated by light[1]. In context radiology (i.e., imaging) generated pulsed laser light are detected an ultrasound transducer[2–4]. It has been shown that produce a mechanical, tactile sensation humans on bare skin[5]. series psychophysical experiments, performed with both medical grade and off-the-shelf systems, participants could detect, categorically describe, discern direction travel optical stimuli...
<sec> <title>BACKGROUND</title> Frequent sensor-assisted monitoring of changes in swallowing function may help improve detection radiation-associated dysphagia before it becomes permanent. While our group has prototyped an epidermal strain/surface electromyography sensor that can detect minute muscle movement, is unknown whether patients with head and neck cancer would be willing to wear such a device at home after radiation for several months. </sec> <title>OBJECTIVE</title> We iteratively...