Abstract: A flexible dry electrode comprises a multi-walled carbon nanotube (MWCNT)/polydimethylsiloxane (PDMS) composite. The flexible dry electrode may be utilized for monitoring electrocardiogram (ECG) signals. The dry ECG electrode may be fabricated by screenprinting silver (Ag) ink on flexible polyethylene terephthalate (PET) substrate, followed by bar coating of a MWCNT/PDMS composite.

Abstract: A fluorescent oxygen sensing ink includes at least one organic solvent, at least one polymer binder disposed in the organic solvent, and an oxygen-sensitive fluorescent dye disposed in the organic solvent. The oxygen-sensitive fluorescent dye and the at least one polymer can interact to form a moisture-resistant film. The fluorescent oxygen sensing ink can be incorporated into an oxygen sensing wound dressing.

Abstract: A pressure sensing system for measuring pressure acting between a user's head and a protective helmet includes a flexible article that is configured to fit between a wearable protective article and a body part of a user. The system further includes a pressure sensor array comprising a plurality of pressure sensors secured to the flexible article. The system may include a data acquisition module configured to provide data from the pressure sensor array to a computer having a display that provides pressure data to a user.

Abstract: A multichannel stethographic device includes a plurality of individual stethoscopes that may be embedded in a foam pad or surface mounted on a thin flexible substrate. Additional stethoscopes for the heart and thorax may also be utilized. The system may include a signal conditioning circuit, wireless DAQ module, and software (algorithms). The systems may be configured to identify and diagnose various disease conditions such as pneumonia, chronic obstructive pulmonary disease (COPD), asthma, congestive heart failure (CHF), interstitial pulmonary fibrosis (IPF), and vocal cord dysfunction (VCD).

Abstract: A flexible dry electrode comprises a multi-walled carbon nanotube (MWCNT)/polydimethylsiloxane (PDMS) composite. The flexible dry electrode may be utilized for monitoring electrocardiogram (ECG) signals. The dry ECG electrode may be fabricated by screenprinting silver (Ag) ink on flexible polyethylene terephtha late (PET) substrate, followed by bar coating of a MWCNT/PDMS composite.

Abstract: A flexible dry electrode comprises a multi-walled carbon nanotube (MWCNT)/polydimethylsiloxane (PDMS) composite. The flexible dry electrode may be utilized for monitoring electrocardiogram (ECG) signals. The dry ECG electrode may be fabricated by screenprinting silver (Ag) ink on flexible polyethylene terephthalate (PET) substrate, followed by bar coating of a MWCNT/PDMS composite.

Abstract: A pressure sensing system for measuring pressure acting between a user's head and a protective helmet includes a flexible article that is configured to fit between a wearable protective article and a body part of a user. The system further includes a pressure sensor array comprising a plurality of pressure sensors secured to the flexible article. The system may include a data acquisition module configured to provide data from the pressure sensor array to a computer having a display that provides pressure data to a user.

Abstract: A printed stretchable strain sensor is provided. The printed stretchable strain sensor has a stretchable substrate and a composite ink coupled to a surface of the stretchable substrate to form a strain-sensitive conductive structure. The composite ink includes both a nanowire and a metal flake. The capability of the fabricated strain sensor, printed in two design configurations: straight line and wavy line, was investigated by studying its electro-mechanical response towards varying elongations of 1 mm, 2 mm, and 3 mm.

Abstract: An inductive-capacitive (LC) wireless sensor for the detection of toxic heavy metal ions includes inductors and interdigitated electrodes (IDE) in planar form. The sensor is fabricated by screen printing silver (Ag) ink onto a flexible polyethylene-terephthalate (PET) substrate to form a metallization layer. Palladium nanoparticles (Pd NP) is drop casted onto the IDEs to form a sensing layer. The resonant frequency of the LC sensor is remotely monitored by measuring the reflection coefficient (S11) of a detection coil (planar inductor). The resonant frequency of the LC sensor changes with varying concentrations of heavy metals such as mercury (Hg2+) and lead (Pb2+) ions. Changes in the resonant frequency are used to detect the presence and/or concentration of heavy metal ions.

Abstract: A multichannel stethographic device includes a plurality of individual stethoscopes that may be embedded in a foam pad or surface mounted on a thin flexible substrate. Additional stethoscopes for the heart and thorax may also be utilized. The system may include a signal conditioning circuit, wireless DAQ module, and software (algorithms). The systems may be configured to identify and diagnose various disease conditions such as pneumonia, chronic obstructive pulmonary disease (COPD), asthma, congestive heart failure (CHF), interstitial pulmonary fibrosis (IPF), and vocal cord dysfunction (VCD).

Abstract: A fluorescent oxygen sensing ink includes at least one organic solvent, at least one polymer binder disposed in the organic solvent, and an oxygen-sensitive fluorescent dye disposed in the organic solvent. The oxygen-sensitive fluorescent dye and the at least one polymer can interact to form a moisture-resistant film. The fluorescent oxygen sensing ink can be incorporated into an oxygen sensing wound dressing.

Abstract: A magneto-electric energy harvester/generator includes a piezoelectric layer, a conductive layer disposed on a first side of the piezoelectric layer, and a layer of magnetic material disposed on a second side of the piezoelectric material. The device may be fabricated by screen printing polyvinylidene fluoride (PVDF) ink onto a flexible magnetic alloy substrate. Silver ink may then be screen printed onto the PVD material to form a conductive layer. The printed PVDF and silver layers may be cured by heating, and the device is then poled by applying an electric field.

Abstract: A printed stretchable strain sensor is provided. The printed stretchable strain sensor has a stretchable substrate and a composite ink coupled to a surface of the stretchable substrate to form a strain-sensitive conductive structure. The composite ink includes both a nanowire and a metal flake. The capability of the fabricated strain sensor, printed in two design configurations: straight line and wavy line, was investigated by studying its electro-mechanical response towards varying elongations of 1 mm, 2 mm, and 3 mm.

Abstract: An impact sensing system includes a first impact sensor having a flexible dielectric layer, a first printed electrode on a first side of the layer, and a second printed electrode on a second side of the layer. The second printed electrode overlies and is moveable toward and away from the first electrode by deformation of the flexible dielectric layer. Further, the layer maintains a capacitance between to the first electrode and the second electrode that changes with a movement of the second electrode toward or away from the first electrode. The system further includes a first readout circuit electronically coupled with the first and second electrodes to measure a change in the capacitance and output a corresponding voltage.

Abstract: A flexible dry electrode comprises a multi-walled carbon nanotube (MWCNT)/polydimethylsiloxane (PDMS) composite. The flexible dry electrode may be utilized for monitoring electrocardiogram (ECG) signals. The dry ECG electrode may be fabricated by screenprinting silver (Ag) ink on flexible polyethylene terephthalate (PET) substrate, followed by bar coating of a MWCNT/PDMS composite.

Abstract: An inductive-capacitive (LC) wireless sensor for the detection of toxic heavy metal ions includes inductors and interdigitated electrodes (IDE) in planar form. The sensor may be fabricated by screen printing silver (Ag) ink onto a flexible polyethylene-terephthalate (PET) substrate to form a metallization layer. Palladium nanoparticles (Pd NP) may be drop casted onto the IDEs to form a sensing layer. The resonant frequency of the LC sensor may be remotely monitored by measuring the reflection coefficient (S11) of a detection coil (planar inductor). The resonant frequency of the LC sensor changes with varying concentrations of heavy metals such as mercury (Hg2+) and lead (Pb2+) ions. Changes in the resonant frequency may be used to detect the presence and/or concentration of heavy metal ions.

Abstract: A flexible microfluidic device, including a first substrate having micro-rough microchannels therein, a second substrate having electrodes thereon, and a bonding layer securing the second substrate to the first substrate. Alternatively, one or more bonding surfaces of the first and second substrate are treated to increase bonding activity, and are bonded together. To manufacture the device, a microchannel mold is formed and placed in a mold cavity to create a master mold. A curable polymeric material is added to the mold cavity and cured to form the first substrate. Electrodes are printed on the second substrate. A bonding layer is coated on the first or second substrate, the substrates are aligned, and the bonding layer is cured. Alternatively, the bonding surfaces of the first and/or second substrate are subjected to treatment to increase bonding activity, the substrates are aligned, and permitted to bond.

Abstract: An impact sensing system includes a first impact sensor having a flexible dielectric layer, a first printed electrode on a first side of the layer, and a second printed electrode on a second side of the layer. The second printed electrode overlies and is moveable toward and away from the first electrode by deformation of the flexible dielectric layer. Further, the layer maintains a capacitance between to the first electrode and the second electrode that changes with a movement of the second electrode toward or away from the first electrode. The system further includes a first readout circuit electronically coupled with the first and second electrodes to measure a change in the capacitance and output a corresponding voltage.