3D Bioplotter Research Papers

We have investigated the potential of three dielectric materials to meet the future demands of green dielectrics: Polycaprolactone (PCL) thermoplastic, polyvinyl alcohol (PVA)-carrageenan (CAR) crosslinked biopolymer, and boron nitride nanotubes (BNNTs) as a nano additive in PVA. Metal–insulator–metal (MIM) capacitors and organic thin film transistors (OTFT) were built with bilayer dielectric stacks of PVA-CAR, PVA-PCL, and PVA-BNNT materials to examine their electrical properties. The PVA-CAR layer uses a cyclic freeze thaw process to crosslink PVA and CAR for superior mechanical and electrical properties to either material alone. The PVA-CAR MIM capacitors showed a dielectric constant of 23, which was found…

There is an urgent need to develop and implement green materials in electronic systems to minimize the negative environmental impact of traditional electronic materials. In this letter, low-temperature cross-linked polyvinyl alcohol (PVA)-carrageenan (CAR) layer is presented as a green electronic gate dielectric for high-performance organic thin-film transistors (OTFT). A metal-free, flexible OTFT, direct printed on polyaniline films using poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) gel-based gate–source–drain layers, PVA-CAR gate dielectric, and 6,13-bis(triisopropylsilylethynyl)pentacene semiconductor, is tested and characterized compared with a more conventional organic gate dielectric polymethylmethacrylate. PVA-CAR metal–dielectric–metal capacitors showed excellent dielectric properties with an average absolute dielectric constant value of 22.36 and an absolute…

The need for oral health monitoring point-of-care (PoC) systems is ever growing. We have recently reported a novel, aptamer-based flexible biosensor for detection of a high impact hormone—cortisol—in saliva samples using organic electrolyte-gated FET (OEGFET) technology. In this work, we are reporting a system-on-board (SoB) level integration of an improved flexible OEGFET aptasensor, which was previously reliant on a bench-top measurement setup. The reported flexible OEGFET aptasensor has integrated soft microfluidics and a low-power (< 300 mW) customized printed circuit board. The interfacing of flexible aptasensor to the circuit board was achieved using a low-temperature extrusion printing technique. The system…