Abstract: The present invention provides a transparent and flexible electronic skin with three-dimensional sensing capability. The electronic skin comprises: a substrate; an transparent and flexible electric field sensor disposed on the substrate; a control circuit disposed on the substrate; and a transparent and flexible protective layer encapsulating the electric field sensor and the control circuit. The electric field sensor includes a transmitter electrode; one or more receiver electrodes; and dielectric layer arranged between the transmitter electrode and receiver electrodes. The control circuit is connected to the electric field sensor and configured to: drive the transmitter electrode to transmit a reference signal to establish a quasi-static electrical near field; and process one or more measurement signals received by the one or more receiver electrodes respectively, each measurement signal is indicative of a distortion of the quasi-static electrical near field due to proximity of an object.

Abstract: The present disclosure provides a stretchable and flexible sweat-activated graphene-coated Ni foam-based Mg—O2 battery capable of powering an intelligent and flexible electronics for health monitoring purposes with different biosensors.

Abstract: A wearable haptic modulation device for real-time simulation of texture properties of a material surface in mixed reality environments is provided. Particularly, it includes a U-shaped pneumatic actuator surrounds a user's fingertip, a finger-housing support creating a space for fingertip containment, a resonant actuator on the finger-housing support generating vibrotactile feedback to enhance perceived roughness on touched physical surfaces, and a pneumatic control system generating pneumatic actuation to reduce the perceived roughness on touched physical surface. Notably, the U-shaped pneumatic actuator allows direct contact of the user's fingerpad with the touched physical surface.

Abstract: A sweat extraction and monitoring system comprises a triboelectric nanogenerator (TENG) for inducing localized sweating for a human skin to generate sweat, iontophoresis electrodes electrically connected to the TENG and configured to be operably electrically contacting the human skin, at least one microfluidic channel for receiving the sweat, at least one biosensor for sensing the sweat received in the at least one microfluidic channel, and at least one sweat-activated battery configured to be actuatable by the sweat for powering the at least one biosensor.

Abstract: A biomimetic thermal regulating fabric (BTRF) imitating army and bivouacs and a method for constructing the same are provided. The BTRF comprises a plurality of yarns formed of textile fibres having a water-actuated crimp behaviour, wherein the plurality of yarns is knitted by means of transfer stitch to form an unsymmetrical fabric structure which has a positive water-actuated expansion rate along a first axis and a negative water-actuated expansion rate along a second axis orthogonal to the first axis. Surfaces of the textile fibres are plasma-treated to have one or more hydrophilic functional groups. One or more colorimetric fabric sensors are incorporated to generate colours in response to one or more ambient environmental conditions or user physiological conditions respectively. The present invention has excellent scalability, biocompatibility, and great dynamic durability, and is advantageous for applications in athletic wear, outdoor wear, and medical textiles.

Abstract: A wearable electronic device for providing or affecting smell. The wearable electronic device includes one or more odor manipulation units and a control circuit arrangement operably coupled with the one or more odor manipulation units for operating the one or more odor manipulation units. Each of the one or more odor manipulation units is respectively operable to provide or affect smell perceivable by a user of the wearable electronic device.

Abstract: The present invention provides a virtual taste generator comprising: a virtual taste interface including: a housing having taste generation channels orthogonally extending through the housing from a top surface to a bottom surface; conductive tastable gels accommodated in the plurality taste generation channels respectively; each having a top end exposed on the top surface of the housing and a bottom end exposed on the bottom surface of the housing; a control system including: switches respectively connected to conductive tastable gels and configured for conducting or blocking electrical currents flowing through the conductive tastable gels respectively; and a controller connected to the switches and configured to generate electrical signals for turning on or off the switches respectively; and wherein each conductive tastable gel is embedded with one or more tastable ion electrophoresis tastable chemical agent and controllably to produce a specific taste through ion electrophoresis.

Abstract: A fish-like shape robotic device includes a fish-like shape carrier portion, a vibrable tail portion, a wireless power receiving module, a driving module, and at least one functional sensor. The fish-like shape carrier portion includes a head portion and a pair of side portions. The wireless power receiving module is configured to receive a wireless power and disposed on the vibrable tail portion and the side portions. The driving module is disposed on the vibrable tail portion, in which the wireless power receiving module transmits the wireless power to the driving module, such that the driving module enables the vibrable tail portion vibrate. The at least one functional sensor is disposed at the head portion and configured to sense a characteristic of an aquatic environment, or detect a living body or a bio-like structure in the aquatic environment, so as to obtain at least one sensing electrical signal.

Abstract: A portable blood pressure sensor comprises a sensing device, a force generation device, a first processor, a first flexible layer, and a second flexible layer. The sensing device comprises a first piezoelectric layer, and a second piezoelectric layer. The force generation device provides back pressure to the first and second piezoelectric layers. The first processor is electrically connected to the sensing device and the force generation device. The second flexible layer encapsulates the sensing device, the force generation device, and the first processor on the first flexible layer.

Abstract: An electronic device for providing or affecting a smell. The electronic device includes a device body, which has a chamber for containing one or more chemical substances and an interface through which the one or more chemical substances in the chamber can be released from the device body to provide or affect a smell perceivable by a user. The electronic device also includes a release control mechanism arranged at least partly in the device body and operable to control release of the one or more chemical substances from the device body through the interface.

Abstract: The present invention provides an integrated sweat sensing system including a multi-layered structure incorporating a flexible circuitry sensing layer with multiple electronic and mechanical components responsible for sensing certain physiological changes of a user and giving feedback signals to the user when a detectable biological, chemical or physiological signal exceeds certain threshold. The system further includes a microfluidic based biosensing platform responsible for sensing changes in sweat component composition including ions, glucose and pH changes, and subsequently trigger feedback signal outputs from the flexible circuitry sensing layer to provide the user with a corresponding change-of-state signal. The present system is bendable and detachably mountable on various skin regions of the user.

Abstract: An electrotactile apparatus has an electrode-array unit and a driver unit for generating a haptic feedback to a user. The electrode-array unit uses electrodes to electro-stimulate the user's skin with pulsed voltage signals generated by the driver unit, inducing excitation currents flowing in the user to generate the haptic feedback. The driver unit is self-powered or wirelessly powered for supporting untethered electrotactile stimulation to the user. A common counter electrode installed on the driver unit contacts the user's skin and collects the excitation currents returned from the user. Advantageously, the common counter electrode is located on an outer surface of the driver unit and the driver unit is substantially flexible, facilitating the common counter electrode to seamlessly contact the user's skin for achieving a stable electrode-skin interface while positioning the driver unit as a whole on the user's skin to provide untethered virtual touching experience to the user.

Abstract: An integrated device for rapid detection of SARS-CoV-2 is disclosed. The integrated device includes a front-end system, a back-end system, and a microfluidic channel. The front-end system includes a detection region and a control region. The detection region and the control region have similar structures, each including an interdigital electrode and a graphene film. The microfluidic channel is arranged to cover the detection region so as to allow the interdigital electrode of the detection region to be exposed to the breath sample. The graphene film of the detection region has a surface resistance higher than that of the graphene film of the control region when the detection region is exposed to a selected virus. The back-end system is configured to detect and compare the surface resistance of the graphene films of the detection region and the control region for determining whether the selected virus is present in the breath sample.

Abstract: A wearable electronic device includes a radiative cooling interface for facilitating cooling of a wearable electronic device. The radiative cooling interface is flexible and is made at least partly of a radiative cooling material that includes a polymeric matrix and one or more materials dispersed in the polymeric matrix. The radiative cooling material is operable to facilitate reflection of solar radiation in at least some solar spectrum wavelengths, when the radiative cooling material is exposed to solar radiation. The radiative cooling material is also operable to facilitate emission of thermal radiation in at least some infrared spectrum wavelengths.

Abstract: The present invention provides an implantable electrostimulation-based drug delivery system incorporating microneedle-based drug delivery module connecting with a wirelessly-controlled electrostimulation module such that under a small input power generated by magnetic coupling between a transmission antenna and a harvester of the wirelessly-controlled electrostimulation module, one or more substances stored in the microneedles can be released to tissues of a target site while no subsequent removal of the system from the target site is required as the system is entirely biodegradable and bioresorbable in vivo after a sufficient period of time.

Abstract: Provided are actuation devices, virtual reality devices formed from the actuation devices, and related virtual reality methods. The devices may comprise a plurality of spatially distributed actuators, each actuator configured for interacting with a biological skin surface; a wireless controller configured to receive operative command signals to control each of the actuators; and a wireless power system to power the actuators. Also provided are unique layouts of multiple interconnected devices to achieve large area coverage.

Abstract: A photodetector for an optoelectronic system and an optoelectronic system including the photodetector. The photodetector includes a flexible substrate, a plurality of photodetector units attached to the flexible substrate, and a circuit attached to the flexible substrate. Each of the plurality of photodetector units are arranged to sense optical radiation and generate a photocurrent signal based on the sensed optical radiation. The circuit comprises a plurality of conductors electrically connected with the plurality of photodetector units. The circuit is arranged to be connected with a signal processor arranged to process the photocurrent signals to generate an image associated with the sensed optical radiation.

Abstract: An electrotactile apparatus has an electrode-array unit and a driver unit for generating a haptic feedback to a user. The electrode-array unit uses electrodes to electro-stimulate the user's skin with pulsed voltage signals generated by the driver unit, inducing excitation currents flowing in the user to generate the haptic feedback. The driver unit is self-powered or wirelessly powered for supporting untethered electrotactile stimulation to the user. A common counter electrode installed on the driver unit contacts the user's skin and collects the excitation currents returned from the user. Advantageously, the common counter electrode is located on an outer surface of the driver unit and the driver unit is substantially flexible, facilitating the common counter electrode to seamlessly contact the user's skin for achieving a stable electrode-skin interface while positioning the driver unit as a whole on the user's skin to provide untethered virtual touching experience to the user.

Abstract: An electronic sensing apparatus and a method of producing the electronic sensing apparatus includes a triboelectric generator encapsulated between a bottom substrate and a top encapsulation layer, wherein the triboelectric generator is arranged to generate a triboelectric sensing signal in response to a deformation of the bottom substrate and/or the top encapsulation layer.

Abstract: A bilayer vibrotactile actuator adapted to provide a vibrational force. The bilayer vibrotactile actuator contains two metal coil layers separated from each other; and a magnet adapted to vibrate as a mass. Each of the two metal coil layers is adapted to be connected to an external power supply to generate an electromagnetic field, causing the magnet to vibrate. A wearable haptic feedback device containing the bilayer vibrotactile actuator is also disclosed. With two metal coil layers effecting on the magnet, the bilayer vibrotactile actuator can generate a more powerful overall magnetic field providing an enhanced haptic sensation to users.