Highly efficient electrochemical energy conversion in a 3D hollow microenvironment: towards on-a-chip sensor applications

Multipurpose analytical platforms that can reliably be adapted to distinct targets are essential nowadays. Here, the conception, characterization, and application of ultracompact three-dimensional (3D) electroanalytical platforms based on self-curled nanomembranes are presented. The electrodes of al...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2020-10, Vol.8 (38), p.19855-19865
Main Authors: Minatogau Ferro, Letícia Mariê, de Barros, Anerise, Zaparoli Falsetti, Luís Otávio, Corrêa, Cátia Crispilho, Merces, Leandro, Bof Bufon, Carlos César
Format: Article
Language:English
Subjects:
Adenine
Biomolecules
Catalytic activity
Electrochemistry
Electrodes
Electron transfer
Energy conversion
Ion transport
NAD
NADH
Neurodegenerative diseases
Nicotinamide
Nicotinamide adenine dinucleotide
Oxidation
Platforms
Sensitivity
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Summary:Multipurpose analytical platforms that can reliably be adapted to distinct targets are essential nowadays. Here, the conception, characterization, and application of ultracompact three-dimensional (3D) electroanalytical platforms based on self-curled nanomembranes are presented. The electrodes of all devices are deterministically integrated on the inner walls of a hollow microtube - a task that cannot be accomplished by approaches other than the successful manipulation of nanomembranes. The on-a-chip architecture demonstrated here allows picoliter-sampling, ensures a well-controlled environment for complex analysis, and improves the catalytic activity by enhancing ion transport and electron transfer rates. As a proof-of-concept, these features are exploited to create a new device to monitor the chemical oxidation of nicotinamide adenine dinucleotide (NADH) - a biomolecule related to human neurodegenerative diseases. Without any electrode functionalization, the nanomembrane-based 3D-devices exhibit sensitivity per unit area compared to the state-of-the-art NADH sensors. Envisioning lab-on-a-chip purposes, the reduced electrode footprint area of the 3D-device makes its sensitivity per area on a chip even higher, attesting the potential of this platform towards further energy conversion applications. Multipurpose analytical platforms that can reliably be adapted to distinct targets are essential nowadays.
ISSN:2050-7488
2050-7496
DOI:10.1039/d0ta05796g