Biocompatible and Biodegradable Materials for Organic Field‐Effect Transistors

Abstract

Biocompatible‐ingestible electronic circuits and capsules for medical diagnosis and monitoring are currently based on traditional silicon technology. Organic electronics has huge potential for developing biodegradable, biocompatible, bioresorbable, or even metabolizable products. An ideal pathway for such electronic devices involves fabrication with materials from nature, or materials found in common commodity products. Transistors with an operational voltage as low as 4–5 V, a source drain current of up to 0.5 μA and an on‐off ratio of 3–5 orders of magnitude have been fabricated with such materials. This work comprises steps towards environmentally safe devices in low‐cost, large volume, disposable or throwaway electronic applications, such as in food packaging, plastic bags, and disposable dishware. In addition, there is significant potential to use such electronic items in biomedical implants.

Industrial vat orange dyes for organic field effect transistors

“…It is interesting to see the strikingly similar appearance of the three vat orange dyes in aggregated (powder form), with comparable shades of orange, as shown by the photograph of the evaporation crucibles, but the rather different appearance in the thin evaporated film of vat orange 3, compared to the other two investigated counterparts. As a matter of fact, vat orange 9 appears in the thin film remarkably analogous in color with vat yellow 1, reported previously by our group, 80,81 a molecule that has two nitrogen atoms at its two core phenyl groups.…”

“…Obviously, the result obtained here, ∼6 × 10 −4 cm 2 Vs −1 is not far off the value obtained previously for vat orange 3, i.e. ∼2 × 10 −3 cm 2 Vs −1 81 and demonstrates that the fabrication route for this organic semiconductor is quite reproducible on different dielectric substrates.…”

Dissolution Chemistry and Biocompatibility of Single-Crystalline Silicon Nanomembranes and Associated Materials for Transient Electronics

“…The rate remains constant (R i ) up to a critical dopant concentration (C 0 ). Above C 0 , a sharp decrease occurs, which is inversely proportional to the fourth power of the dopant concentration (C) consistent with a functional form established from studies of silicon under conditions of high pH 27 4 (1)…”

Impact of imine bonds on the electronic properties of degradable carotenoid-based conjugated polymers

“…In contrast, p(CP-hexyl) performed poorly, with mobilities on the order of 10 −8 cm 2 V −1 s −1 , regardless of the presence of dopants. The performance of p(CP-hexyl) is on par with the electronic performance of β-carotene reported in similar device architectures, 62,63 which further demonstrates the detrimental effect of the imine bond on electronic performance despite the increase of conjugation length in the polymeric state. We note that the transfer and output curves for p(CP-hexyl) and some of the output curves for caro-PPV are non-standard and we attribute this to poor semiconductor performance, as seen with β-carotene.…”

“…In contrast, p(CP-hexyl) performed poorly, with mobilities on the order of 10 −8 cm 2 V −1 s −1 , regardless of the presence of dopants. The performance of p(CP-hexyl) is on par with the electronic performance of β-carotene reported in similar device architectures, 62,63 which further demonstrates…”