Electrochemical Performance of Porous Diamond-like Carbon Electrodes for Sensing Hormones, Neurotransmitters, and Endocrine Disruptors

Silva, Tiago; Zanin, Hudson; May, Paul; Corat, Evaldo José; Fatibello‐Filho, Orlando

doi:10.1021/am505928j

Cited by 45 publications

(25 citation statements)

References 53 publications

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“…We then showed that coating the VAMWCNT with DLC resulted in porous, electrically conducting DLC films (DLC:VAMWCNT) with promising electrochemical behaviour. The DLC:VAMWCNT composite electrode exhibited fast electron transfer kinetics toward inorganic and organic redox probes, as well as high analytical sensitivity in the cyclic voltammetric determination of biomolecules (dopamine, epinephrine and paracetamol) .…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Voltammetric Determination of Paracetamol, Codeine and Caffeine on Diamond‐like Carbon Porous Electrodes

2016

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1Introduction Diamond-like carbon( DLC) materials refer to ac lass of carbon materials composedo famixture of sp 2 (trigonal) and sp 3 (tetrahedral) carbon hybridizations [1].D LC exhibits as et of very interesting chemicala nd physical properties,i ncluding high hardness and elastic modulus, low friction coefficient, excellent thermal stability,c hemical inertness,o ptical transparency, high electrical resistance and bio-compatibility [1c, 2].T hese properties are dependent upon the relative ratio of sp 2 and sp 3 hybridization content [3].T herefore,D LC films presents imilar properties to those of crystalline diamond films,w ith the extra advantagethat they can be deposited at low temperatures and thereforeu pon low-melting substratess uch as polymers,g lass,s emiconductors,e tc. [4].M any DLC properties are also desirable for working electrodes used for ar ange of differente lectrochemical applications,e specially electroanalytical chemistry. However,D LC films are usually electrically insulating,with electricalresistivity values typically > 10 6 W cm [5],w hich limits their use in electroanalyticalc hemistry.T oo vercomet his,r esearchers have investigatedi nsertingc harge donors or acceptors as dopants [6],o rh ave prepared ultra-thin films DLC to improve the electricaland thermal conductivities [7].Another approach is to design all-carbon films by incorporation of conductive carbon allotropic forms such as carbon nanotubes within the normally insulating DLC film. This strategy has been proposed by different authors but most reports concern investigationo ft he mechanical features of the obtainedf ilms [8].O nly in recent years has the electrochemical behaviouro fC NT/DLC compo-site electrodesb een explored. We recently reported the synthesiso fp orous DLC films prepared on vertically aligned multi-walled carbonn anotubes (VAMWCNT) [9].W ef irst showed that af ast electron transfer rate and excellenta nalytical performance was achieved from the use of the VA MWCNT baseda rchitecture alone as electrochemical sensor [10].W ethen showed that coatingt he VA MWCNT with DLCr esulted in porous,e lectrically conducting DLC films (DLC:VAMWCNT) with promising electrochemicalb ehaviour. TheD LC:VAMWCNT composite electrode exhibited fast electron transfer kinetics toward inorganic and organicr edox probes, as well as high analyticalsensitivity in the cyclic voltammetric determination of biomolecules( dopamine, epinephrine and paracetamol) [9b,c].Abstract:Aporous electrode material combiningt he features of vertically aligned multi-walled carbon nanotubes (VAMWCNT) and diamond-like carbon films (DLC) have been developed for ah ighly sensitive electrochemical sensor.F or working electrodep reparation, DLC has been grown onto VA MWCNT,f orming ap orous,c onductive and stable composite.T he electrochemicalp erformance of this DLC:VAMWCNT electrode has been investigated toward detection and analysis of three wellknown molecules,n amely paracetamol, codeine and caffeine.Aternary mixture of thesea nalytesw as simultane-ously ...

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Section: Introductionmentioning

confidence: 99%

Simultaneous Voltammetric Determination of Paracetamol, Codeine and Caffeine on Diamond‐like Carbon Porous Electrodes

2016

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“…Recently, DLC films have emerged as an area of significant interest for certain electrochemical applications. This interest is a result of characteristic and desirable properties being realised; such as mechanical hardness, low surface roughness, enhanced elastic modulus and chemical inertness, as well as its semiconductor nature, with a tuneable band gap of 1 to 4 eV (approximately) [115].…”

Section: Diamond-like Carbonmentioning

confidence: 99%

Carbon nanomaterials and their application to electrochemical sensors: a review

Power¹,

Gorey²,

Chandra³

et al. 2018

Nano Online

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Carbon has long been applied as an electrochemical sensing interface owing to its unique electrochemical properties. Moreover, recent advances in material design and synthesis, particularly nanomaterials, has produced robust electrochemical sensing systems that display superior analytical performance. Carbon nanotubes (CNTs) are one of the most extensively studied nanostructures because of their unique properties. In terms of electroanalysis, the ability of CNTs to augment the electrochemical reactivity of important biomolecules and promote electron transfer reactions of proteins is of particular interest. The remarkable sensitivity of CNTs to changes in surface conductivity due to the presence of adsorbates permits their application as highly sensitive nanoscale sensors. CNT-modified electrodes have also demonstrated their utility as anchors for biomolecules such as nucleic acids, and their ability to diminish surface fouling effects. Consequently, CNTs are highly attractive to researchers as a basis for many electrochemical sensors. Similarly, synthetic diamonds electrochemical properties, such as superior chemical inertness and biocompatibility, make it desirable both for (bio) chemical sensing and as the electrochemical interface for biological systems. This is highlighted by the recent development of multiple electrochemical diamond-based biosensors and bio interfaces.Keywords: bio sensors; carbon nanomaterials; carbon nanotubes; electrochemical sensing; synthetic diamond Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.

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“…VACNT films have been grown on titanium grade 2 substrate (pure titanium) or titanium grade 5 (Ti6Al4V alloy) by microwave plasma assisted chemical vapor deposition (MWCVD). [56][57][58] Figure 3 shows a schematic drawing of the MWCVD reactor. The home-built MWCVD reactor chamber, shown in Fig.…”

Section: Our Developmentsmentioning

confidence: 99%

Preparation and electroanalytical applications of vertically aligned carbon nanotubes

Silva

Corat

May³

et al. 2015

Electrochemistry

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Electrochemical Performance of Porous Diamond-like Carbon Electrodes for Sensing Hormones, Neurotransmitters, and Endocrine Disruptors

Cited by 45 publications

References 53 publications

Simultaneous Voltammetric Determination of Paracetamol, Codeine and Caffeine on Diamond‐like Carbon Porous Electrodes

Simultaneous Voltammetric Determination of Paracetamol, Codeine and Caffeine on Diamond‐like Carbon Porous Electrodes

Carbon nanomaterials and their application to electrochemical sensors: a review

Preparation and electroanalytical applications of vertically aligned carbon nanotubes

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