Abstract:
A curved origami-based metamaterial includes a panel of material having a plurality of curved creases each disposed within a plane of the panel. The panel is configured to be folded along one of the plurality of creases, and the panel is also configured to be bent about an axis disposed outside the plane of the panel. Stiffness manipulation is configured to be achieved in situ by activating a different one of the plurality of curved creases
Abstract:
Systems and methods are presented for a swallowable pH sensor made entirely of edible and digestible materials. A substrate is provided and an electrical circuit pattern is printed on a top surface of the substrate. The electrical circuit pattern includes a plurality of interdigitated electrodes and an antenna portion. The substrate is rolled into a cylindrical form such that the interdigitated electrodes are positioned on an outermost layer of the rolled substrate. The rolling of the substrate also causes the antenna portion of the electrical circuit pattern to form into a coil shape.
Abstract:
Systems and methods are presented for a swallowable pH sensor made entirely of edible and digestible materials. A substrate is provided and an electrical circuit pattern is printed on a top surface of the substrate. The electrical circuit pattern includes a plurality of interdigitated electrodes and an antenna portion. The substrate is rolled into a cylindrical form such that the interdigitated electrodes are positioned on an outermost layer of the rolled substrate. The rolling of the substrate also causes the antenna portion of the electrical circuit pattern to form into a coil shape.
Abstract:
Described herein are diffraction gratings and methods for the manufacture thereof. One method comprises applying a force to a substrate to strain the substrate, disposing a thin film on at least a portion of the substrate, and reducing the force applied to the substrate, thereby causing the thin film to buckle.
Abstract:
A flexible silicon anode includes a flexible substrate, a layer of silicon with a thickness of 1 μm or less adhered to the flexible substrate, and a current collector in contact with the layer of silicon. A lithium ion battery cell includes a flexible silicon anode, a current collector in contact with the layer of silicon; a lithium cathode; a separator between the silicon anode and the lithium cathode; an electrolyte in contact with the silicon anode and the lithium cathode; and an electrical connection between the silicon anode and the lithium cathode. Forming the flexible silicon anode can include etching a silicon-on-insulator structure to form a silicon layer on the silicon substrate, treating the silicon layer, contacting the treated silicon layer with a flexible substrate, and separating the flexible substrate and the silicon substrate, thereby transferring the treated silicon layer from the silicon substrate to the flexible substrate.
Abstract:
Described herein are diffraction gratings and methods for the manufacture thereof. One method comprises applying a force to a substrate to strain the substrate, disposing a thin film on at least a portion of the substrate, and reducing the force applied to the substrate, thereby causing the thin film to buckle.
Abstract:
In an aspect, the present invention provides stretchable, and optionally printable, components such as semiconductors and electronic circuits capable of providing good performance when stretched, compressed, flexed or otherwise deformed, and related methods of making or tuning such stretchable components. Stretchable semiconductors and electronic circuits preferred for some applications are flexible, in addition to being stretchable, and thus are capable of significant elongation, flexing, bending or other deformation along one or more axes. Further, stretchable semiconductors and electronic circuits of the present invention are adapted to a wide range of device configurations to provide fully flexible electronic and optoelectronic devices.
Abstract:
A curved origami-based metamaterial includes a panel of material having a plurality of curved creases each disposed within a plane of the panel. The panel is configured to be folded along one of the plurality of creases, and the panel is also configured to be bent about an axis disposed outside the plane of the panel. Stiffness manipulation is configured to be achieved in situ by activating a different one of the plurality of curved creases.
Abstract:
A dynamic and refreshable three-dimensional tactile display uses stimulus sensitive hydrogel blocks as pixels to create a touch surface with elevations from a two-dimensional optical image or from stored data. The movable three-dimensional tactiles are powerful in teaching Science, Technology, Engineering, and Mathematics (STEM) materials to visually impaired and blind students.
Abstract:
Methods are described for addressing the bowing and/or warping of flexible substrates, attached to a rigid carrier, which occurs as a result of the thermal challenges of semiconductor processing. In particular, viscoelastic adhesives are provided which can bond a flexible substrate to a rigid carrier and mediate the thermal mismatch which often is present due to the distinctly different materials properties of most flexible substrates, such as plastic films, with respect to rigid carriers, such as silicon wafers. Assemblies are also provided which are produced according to the methods described herein.