A Simple Method to Allow Parylene-C Coatings on Gold Substrates

Driesche, Sander van den; Habben, Christian; Bödecker, André; Lang, Walter; Vellekoop, Michael J.

doi:10.3390/proceedings1040299

Cited by 6 publications

(2 citation statements)

References 5 publications

(5 reference statements)

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“…Before deposition of the next 2‐µm PaC passivation layer, silanization was done with A‐174 silane to facilitate adhesion. [ 73 ] An anti‐adhesive layer consisting of a 5% micro‐90 aqueous solution was spin‐coated before the deposition of the third PaC layer. The anti‐adhesive layer was formed by spin‐coating at a rate of 1000 rpm and baking at 80 °C for 5 min to enhance uniformity.…”

Section: Methodsmentioning

confidence: 99%

High‐Performance Internal Ion‐Gated Organic Electrochemical Transistors for High‐Frequency Bioimpedance Analysis

Yeung

Veronica

et al. 2022

Adv Materials Technologies

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Internal ion‐gated organic electrochemical transistor (IGT) demonstrates volume‐dependent transconductance with the unprecedented advantages of high speed and self‐(de)doping capability among ion‐based transistors. The novel characteristics have albeit rendered IGT a promising platform for integrated bioelectronics, its potential in high‐frequency applications has yet been fully harnessed. Moreover, a study from a material's point of view is especially needed for this recently emerged platform as the necessity of maintaining the internal ion reservoir has posed difficulties in processing hydrated poly(3,4‐ethylenedioxythiophene) doped with poly(styrene sulphonate) (PEDOT:PSS) with electronically favorable morphologies. Herein, a comprehensive investigation of the structural and functional properties of ion‐embedded PEDOT:PSS modified by different annealing temperatures is performed and correlated to the IGT performance. A short‐time high‐temperature annealing treatment is found effective in facilitating the formation of compact microstructures without significantly influencing film hydration. The structural improvement enhances the film's conductivity and hole mobility, with the corresponding IGTs exhibiting higher gain, higher conductance, and high cut‐off frequency consistently in a batch. This study also successfully demonstrates the first use of electrochemical transistors like IGTs in high‐frequency applications through proof‐of‐concept experiments simulating fluid estimation in 50 kHz bioimpedance analysis. This work contributes to the development of high‐performance IGTs for extensive biological applications.

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Section: Methodsmentioning

confidence: 99%

High‐Performance Internal Ion‐Gated Organic Electrochemical Transistors for High‐Frequency Bioimpedance Analysis

Yeung

Veronica

et al. 2022

Adv Materials Technologies

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“…Other covalent linkers also have been reported. [123] Various derivatives of the di-(para-xylene) dimer exist, leading to different types of parylenes. The most characterized in the context of bioelectronics is the chlorinated Parylene-C, where each monomer contains a chlorine substituent.…”

Section: Insulating Polymersmentioning

confidence: 99%

State‐of‐the‐Art Electronic Materials for Thin Films in Bioelectronics

Gablech

Głowacki

2023

Adv Elect Materials

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This review is dedicated to electronics materials enabling thin‐film‐based neural interface and bioelectronics devices. First‐generation bioelectronic medicine devices feature hand‐crafted bulk interface electrodes, wires and interconnects, and insulators. This review discusses how modern materials science, especially know‐how repurposed from semiconductor and microdevice technologies, enables next‐generation bioelectronics. Those are divided into two subgroups: second and third generation. The former refers to rigid microscaled devices, while the latter is defined as soft, ultrathin, and flexible microdevices. A critical assessment of different biointerface electrodes, conductors for interconnects, and insulators for substrates, passivation, and encapsulation layers is made. The goal is not to give an exhaustive account of every use‐example of given materials, but to point out specific aspects that are relevant to making the right choices for materials for a given device or application. Unique advantages of specific materials are highlighted, while also focusing on weaker points and caveats that those materials may have. The goal is to have an up‐to‐date handbook for persons entering the field which also points out tips and tricks as well as challenging problems that researchers can be inspired to confront and overcome.

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