Micropyramid structured photo capacitive interfaces

Scientific paper - Original scientific paper

• Author: Marta Nikić
• Author: Aleksandar Opančar
• Author: Florian Hartmann
• Author: Ludovico Migliaccio
• Author: Marie Jakešová
• Author: Eric Daniel Głowacki
• Author: Vedran Đerek
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

Optically driven electronic neuromodulation devices are a novel tool in basic research and offer new prospects in medical therapeutic applications. Optimal operation of such devices requires efficient light capture and charge generation, effective electrical communication across the device’s bioelectronic interface, conformal adhesion to the target tissue, and mechanical stability of the device during the lifetime of the implant—all of which can be tuned by spatial structuring of the device. We demonstrate a 3D structured opto-bioelectronic device—an organic electrolytic photocapacitor spatially designed by depositing the active device layers on an inverted micropyramid-shaped substrate. Ultrathin, transparent, and flexible micropyramidshaped foil was fabricated by chemical vapour deposition of parylene C on silicon moulds containing arrays of inverted micropyramids, followed by a peel-off procedure. The capacitive current delivered by the devices showed a strong dependency on the underlying spatial structure. The device performance was evaluated by numerical modelling. We propose that the developed numerical model can be used as a basis for the design of future functional 3D design of optobioelectronic devices and electrodes.

• Keywords (english): parylene; bioelectronic; micropyramid; mould
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Nanotechnology
• Numbering: vol. 33, no. 24, 245302
• p-ISSN: 0957-4484
• e-ISSN: 1361-6528
• DOI: https://doi.org/10.1088/1361-6528/ac5927
• URN:NBN: urn:nbn:hr:217:066532
• Publication: 2022-03-23
• Project: Number: UIP-2019-04-1753; Title (croatian): Mikro i nano-strukture za 3D opto-bioelektroniku; Title (english): Micro- and nano-structures for 3D opto-bioelectronics; Acronym: 3Doptobio; Leader: Vedran Đerek; Jurisdiction: Croatia; Funding stream: Installation Research Projects
• Project: Number: KK.01.1.1.01.0004; Title (croatian): Provedba vrhunskih istraživanja u sklopu Znanstvenog centra izvrsnosti za kvantne i kompleksne sustave te reprezentacije Liejevih algebri; Title (english): Implementation of top research within the Scientific Center of Excellence for Quantum and Complex Systems, and Representations of Lie Algebras; Acronym: QuantiXLie; Leader: Hrvoje Buljan; Jurisdiction: eu; Funding stream: European Regional Development Fund
• Project: Number: KK.01.1.1.02.0013; Title (croatian): Centar za Napredna Istraživanja Kompleksnih Sustava; Title (english): Centre for Advanced Research of Complex Systems; Acronym: CeNIKS; Leader: Mihael Srđan Grbić; Jurisdiction: eu; Funding stream: European Regional Development Fund
• Document URL: https://iopscience.iop.org/article/10.1088/1361-6528/ac5927
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2022 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 12 November 2021, revised 1 February 2022; Accepted for publication 28 February 2022; Published 23 March 2022.
• Created on: 2024-08-31 20:28:42