Rapid industrial scale synthesis of robust carbon nanotube network electrodes for electroanalysis

Leppänen, Elli; Etula, Jarkko; Engelhardt, Peter; Sainio, Sami; Jiang, Hua; Mikladal, Bjørn; Peltonen, Antti; Varjos, Ilkka; Laurila, Tomi

doi:10.1016/j.jelechem.2021.115255

Cited by 11 publications

(5 citation statements)

References 52 publications

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“…We selected two different types of electrodes to study the stability of AA, which were tetrahedral amorphous carbon (ta-C) electrode and SWCNT network electrode. As we have thoroughly characterized both ta-C 26 , 27 and SWCNT electrodes 28 earlier, we did not repeat those characterizations in this study. If the reader is interested on the characteristics of these electrodes, we kindly guide the reader towards those publications.…”

Section: Resultsmentioning

confidence: 99%

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Ascorbic acid does not necessarily interfere with the electrochemical detection of dopamine

Rantataro

Pascual

Laurila

2022

Sci Rep

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It is widely stated that ascorbic acid (AA) interferes with the electrochemical detection of neurotransmitters, especially dopamine, because of their overlapping oxidation potentials on typical electrode materials. As the concentration of AA is several orders of magnitude higher than the concentration of neurotransmitters, detection of neurotransmitters is difficult in the presence of AA and requires either highly stable AA concentration or highly selective neurotransmitter sensors. In contrast to the common opinion, we show that AA does not always interfere electrochemical detection of neurotransmitters. The decay of AA is rapid in cell culture medium, having a half-time of 2.1 hours, according to which the concentration decreases by 93% in 8 hours and by 99.75% in 18 hours. Thus, AA is eventually no longer detected by electrodes and the concentration of neurotransmitters can be effectively monitored. To validate this claim, we used unmodified single-wall carbon nanotube electrode to measure dopamine at physiologically relevant concentration range (25–1000 nM) from human midbrain organoid medium with highly linear response. Finally, AA is known to affect dopamine oxidation current through regeneration of dopamine, which complicates precise detection of small amounts of dopamine. By designing experiments as described here, this complication can be completely eliminated.

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Section: Resultsmentioning

confidence: 99%

“…SWCNT networks were fabricated with earlier introduced protocol 28 . Briefly, the SWCNT networks were fabricated in a laminar flow reactor by chemical vapor deposition and were collected using a membrane filter.…”

Section: Methodsmentioning

confidence: 99%

Ascorbic acid does not necessarily interfere with the electrochemical detection of dopamine

Rantataro

Pascual

Laurila

2022

Sci Rep

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“…As quantified in Table 1, in addition to metal contaminants being removed, the remaining surface oxygen loading is also remarkably low when compared to typical carbon nanomaterials. [1][2][3][4] This further increases EUV transmission, since oxygen absorbs EUV more than carbon. 5…”

Section: Purificationmentioning

confidence: 99%

Carbon nanotube membranes for EUV photolithography: a versatile material platform

Etula,

Soliman,

Ghosh

et al. 2023

International Conference on Extreme Ultraviolet Lithography 2023

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“…Carbon supports have been shown to be important in determining the ORR activity, and 3D electron tomography has been used to demonstrate the porous structure of various carbon support, including carbon nanotubes, microporous carbon and mesoporous carbon ( Pei et al, 2010 ; Banham et al, 2011 ; Banham et al, 2012 ; Banham et al, 2015 ; Leppanen, 2021 ). Due to the low contrast of carbon in HAADF-STEM, some of the 3D electron tomography were performed using BFTEM.…”

Section: D Electron Tomography For Electrocatalysts At Nanoscalementioning

confidence: 99%

Recent Progress on Revealing 3D Structure of Electrocatalysts Using Advanced 3D Electron Tomography: A Mini Review

Wang

2022

Front. Chem.

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Electrocatalysis plays a key role in clean energy innovation. In order to design more efficient, durable and selective electrocatalysts, a thorough understanding of the unique link between 3D structures and properties is essential yet challenging. Advanced 3D electron tomography offers an effective approach to reveal 3D structures by transmission electron microscopy. This mini-review summarizes recent progress on revealing 3D structures of electrocatalysts using 3D electron tomography. 3D electron tomography at nanoscale and atomic scale are discussed, respectively, where morphology, composition, porous structure, surface crystallography and atomic distribution can be revealed and correlated to the performance of electrocatalysts. (Quasi) in-situ 3D electron tomography is further discussed with particular focus on its impact on electrocatalysts’ durability investigation and post-treatment. Finally, perspectives on future developments of 3D electron tomography for eletrocatalysis is discussed.

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Rapid industrial scale synthesis of robust carbon nanotube network electrodes for electroanalysis

Cited by 11 publications

References 52 publications

Ascorbic acid does not necessarily interfere with the electrochemical detection of dopamine

Ascorbic acid does not necessarily interfere with the electrochemical detection of dopamine

Carbon nanotube membranes for EUV photolithography: a versatile material platform

Recent Progress on Revealing 3D Structure of Electrocatalysts Using Advanced 3D Electron Tomography: A Mini Review

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