Abstract: Wireless strain and displacement sensors wirelessly monitor structural health and integrity, and are made by printing inductor-interdigital capacitor sensing circuits on a variety of substrates, including ceramic substrates, with thermally processable conductive inks. Sensors of the invention can be employed to detect strain and displacement of civil structures, such as bridges and buildings. The sensors include sensing elements that are mounted or printed on stiff, inflexible substrates, which prevent the sensing elements from bending, stretching, or otherwise warping when the sensor is strained. An interlayer between the sensing elements allows the sensing elements to move with respect to each other during application of strain. Thus, strain causes the sensing elements to move but not to deform, causing changes in sensor resonance that can be detected through wireless radio-frequency interrogation.

Abstract: Wireless strain and displacement sensors wirelessly monitor structural health and integrity, and are made by printing inductor-interdigital capacitor sensing circuits on a variety of substrates, including ceramic substrates, with thermally processable conductive inks. Sensors of the invention can be employed to detect strain and displacement of civil structures, such as bridges and buildings. The sensors include sensing elements that are mounted or printed on stiff, inflexible substrates, which prevent the sensing elements from bending, stretching, or otherwise warping when the sensor is strained. An interlayer between the sensing elements allows the sensing elements to move with respect to each other during application of strain. Thus, strain causes the sensing elements to move but not to deform, causing changes in sensor resonance that can be detected through wireless radio-frequency interrogation.

Abstract: A photodetection device uses configurations of photodynamic proteins which exhibit a change in electrical conductivity in response to a corresponding change in incident light intensity in the presence of an applied voltage. The photodynamic proteins are coupled to an electrical conductor, a voltage source and a conductivity sensor. The photodynamic protein complex includes at least one layer of a photodynamic protein and preferably includes a multi-layered thin-film structure with each layer comprised of either a photodynamic protein or a conductive polymer or oligomer. Groups of linked photodetectors where the photodetectors have different, but overlapping, spectral response ranges are used to detect specific wavelengths of incident light. An array of these groups of linked photodetectors arranged in a predetermined spatial pattern allows detection of both colon and images.