Systems, devices, and methods for wirelessly delivering haptic effects are provided. The devices may include haptic actuators secured to various substrates, including the body and clothing of a user. The haptic actuators may be secured via adhesive and/or may be applied as a curable liquid. The haptic actuators may include an actuator element and a power element. The power element may include an antenna for receiving wireless power and control signals that may be transferred to the haptic actuator to cause a haptic effect.

A manufacturing process to form a positioning control tool, such as a gyroscope, by using a three-dimensional (3D) printer printing a polymer material mixed with powdered graphene (12a) components (410) on a piezoelectric substrate (205), the components (410) include: a resonator (411) transducer configured to create a first surface acoustic wave (215); a pair of reflectors (412a, 412b) configured to reflect the first surface acoustic wave (215); a structure (413) which, when subjected to a Coriolis force, creates a second surface acoustic wave (230); a first sensor transducer (414) configured to sense the second surface acoustic wave (230); and a second sensor transducer (415) configured to sense a residual surface acoustic wave from a second region of the surface (210) of the piezoelectric substrate free of the structures that respond to the Coriolis force.

A method of manufacturing a piezoelectric element includes: forming a patterned mask layer over a substrate, in which the patterned mask layer has an opening exposing a portion of the substrate; forming a piezoelectric element in the opening; and removing the patterned mask layer to obtain the piezoelectric element, in which the piezoelectric element has a central portion and a peripheral portion adjacent to the central portion, and the peripheral portion has a maximum height greater than a height of the central portion.

The present invention provides a process for the fabrication of a flexible strain and pressure sensor using a synergistic composition of ZnO nanoparticle and graphene nanoplatelets. The substrate used is PDMS, a polymer that imparts the desired properties of flexibility and durability to the sensor. The invention also discloses a simple and facile process of sensor fabrication, wherein the sensing element is embedded in the substrate material, and thereby prevents any deformation or peeling even after repeated stretch/release cycles. The reported flexible sensors can replace the conventional stiff sensors due to their ability to be contoured on curved surfaces, such as body parts. These sensors can find applications in wearable electronics and can have myriad of uses in healthcare monitoring, human-machine interface, electronic skin on prosthetics, and so on.

The present invention provides a process for the fabrication of a flexible strain and pressure sensor using a synergistic composition of ZnO nanoparticle and graphene nanoplatelets. The substrate used is PDMS, a polymer that imparts the desired properties of flexibility and durability to the sensor. The invention also discloses a simple and facile process of sensor fabrication, wherein the sensing element is embedded in the substrate material, and thereby prevents any deformation or peeling even after repeated stretch/release cycles. The reported flexible sensors can replace the conventional stiff sensors due to their ability to be contoured on curved surfaces, such as body parts. These sensors can find applications in wearable electronics and can have myriad of uses in healthcare monitoring, human-machine interface, electronic skin on prosthetics, and so on.

Provided are an electroacoustic conversion film web, an electroacoustic conversion film, and a method of manufacturing an electroacoustic conversion film web in which costs can be reduced by reducing the number of operations without damage to thin film electrodes, the points of electrode lead-out portions can be freely determined, and thus high productivity can be achieved. A preparation step of preparing an electrode laminated body in which a single thin film electrode and a single protective layer are laminated and a lamination step of laminating the electrode laminated body and an piezoelectric layer are included. A non-adhered portion that is not adhered to the piezoelectric layer is provided in at least one end portion of the thin film electrode in a case where the electrode laminated body and the piezoelectric layer are laminated in the lamination step.

A piezoelectric element includes a first and a second electrode, a piezoelectric layer between the first electrode and the second electrode, and an orientation control layer between the first electrode and the piezoelectric layer. The orientation control layer contains perovskite complex oxide containing potassium, sodium, calcium, and niobium and preferentially oriented in the (100) plane.

A piezoelectric wire of the present invention includes a conductive wire 11 and a polymer piezoelectric layer 12 that coats the conductive wire 11. The polymer piezoelectric layer 12 contains a -phase polyvinylidene fluoride-based copolymer, and the conductive wire 11 has a wire diameter of 1.0 mm or less. The -phase polyvinylidene fluoride-based copolymer is preferably at least one selected from a vinylidene fluoride-trifluoroethylene copolymer and a vinylidene fluoride-tetrafluoroethylene copolymer.

A method for promoting an electric output of a piezoelectric/conductive hybrid polymer is provided. The method includes forming a piezoelectric/conductive hybrid polymer by mixing poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) so as to increase an output current and an output power of the piezoelectric/conductive hybrid polymer; and changing a surface structure of the piezoelectric/conductive hybrid polymer by a nano-imprint process for promoting a piezoelectricity of the piezoelectric/conductive hybrid polymer. As a result, an output voltage, the output current and the output power of the piezoelectric/conductive hybrid polymer are increased.

The purpose of quartz homeotypes grown epitaxially on beta quartz for use in pressure sensors or accelerometers is to be able to drastically cut down production costs on otherwise expensive or time-consuming to grow crystals that are necessary in various industrial applications. This is done via epitaxial growth of quartz homeotypes across the whole surface of a sample of beta quartz, an easily accessible and high temperature capable crystal. This invention also applies to the epitaxial application of piezoelectric material atop a piezoelectric crystal for the purpose of altering its piezoelectric coefficient and the epitaxial application of a piezoelectric crystal atop a host crystal for the purpose of increasing its insulation resistance.