LNNano - Brazilian Nanotechnology National Laboratory


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Flexible electronics:

Three-Dimensional Organic Conductive Networks Embedded in Paper for Flexible and Foldable Devices

Figura Highlights (2)

The fabrication of three-dimensional (3D) polypyrrole conductive tracks through the porous structure of paper is demonstrated by the first time. We combined paper microfluidics and gas-phase pyrrole monomers to chemically synthesize polypyrrole-conducting channels embedded in-between the cellulose fibers. By using this method, foldable conductive structures can be created across the whole paper structure, allowing the electrical connection between both sides of the substrate. As a proof of concept, top-channel-top (TCT) and top-channel-bottom (TCB) conductive interconnections as well as all-organic paper-based touch buttons are demonstrated.

Santhiago, M.; Bettini, J.; Araújo, S.R.; Bufon, C.C.B. ACS Appl. Mater. Interfaces, 2016, 8(17), pp 10661–10664  DOI: 10.1021/acsami.6b02589.

Direct link: http://pubs.acs.org/doi/abs/10.1021/acsami.6b02589



Organic electronics:

Water-gated phthalocyanine transistors: Operation and transduction of the peptide-enzyme interaction

biosensor_graficoThe use of aqueous solutions as the gate medium is an attractive strategy to obtain high charge carrier density (1012 cm-2) and low operational voltages (< 1 V) in organic transistors. Additionally, it provides a simple and favorable architecture to couple both ionic and electronic domains in a single device, which is crucial for the development of novel technologies in bioelectronics. Here, we demonstrate the operation of transistors containing copper phthalocyanine (CuPc) thin-films gated with water and discuss the charge dynamics at the CuPc/water interface (interfacial ion doping effects). Water-gated CuPc OTFTs were also employed in the transduction of the biospecific interaction between tripeptide reduced glutathione (GSH) and glutathione S-transferase (GST) enzyme, taking advantage of the device sensitivity and multiparametricity.

Oliveira, R.F.; Merces, L.; Vello, T.P.; Bufon, C.C.B. . Organic Electronics, 31, 217-226(2016)URL