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Printed electronics is considered a promising technology for low-cost electronics due to its low cost per unit area, typically offered at the expense of degraded performance. Using a combination of synthetic nanoparticles, organic semiconductors, and novel printing techniques, we demonstrate a range of printed electronic devices including transistors, passive components, and a range of chemical sensors...
We report an OTFT-based label-free DNA hybridization detection system integrating electrically-read DNA hybridization sensors and microfluidic delivery channels. We use DNA-doped OTFTs as electrically-read DNA sensors. By integrating with polymer microfluidics, for the first time, we demonstrate the technologies required to realize disposable, rapid turn-around tools for field-deployable genetic diagnosis.
The field of organic semiconductor based electronics has seen significant and unprecedented progress in the past decade. Low-cost, less energy-intensive and high-throughput production, implementation on flexible and non-planar surfaces, novel applications, as well as the potential to move to more environmentally friendly electronics makes this technology particularly attractive. A wide range of applications...
For the first time, we demonstrate organic transistor-based DNA sensors. DNA molecules are immobilized directly on the surface of organic semiconductors, producing an unambiguous doping-induced threshold voltage shift. With these shifts, single- and double stranded DNA are differentiated successfully. Factors that influence sensor sensitivity have been analyzed and optimum conditions have been determined...
Printing is considered an attractive technology for realizing electronic functionality at low cost. Inkjet printing, in particular is very attractive for applications requiring low material consumption and spatially-specific material deposition. We report on inkjet-printed transistors offering performance approaching that of amorphous silicon, fabricated using nanoparticle-based metallization and...
Embedded sensors based on printed organic semiconductors are attractive for use in product content monitoring due to their low cost. Arraying multiple sensor elements, in a bridge topology, yields signatures that achieve high specificity using non-specific elements. The output signal is amplified and digitized to detect numerous analytes with up to 10ppm sensitivity. A wine-spoilage application is...
We demonstrate printed organic transistors with sub-10V VDD . Using inkjetted nanoparticle conductors, a polymer dielectric, and a pentacene precursor semiconductor, we demonstrate devices on plastic with mobilities >0.05cm2/V-s and on-off ratios >105. Thus, for the first time, we demonstrate devices with operating specifications approaching those required for low-cost electronic systems
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