Laser-activated screen-printed carbon electrodes for enhanced dopamine determination in the presence of ascorbic and uric acid

Alba, Alejandro Fidel; Totoricaguena-Gorriño, Joseba; Sanchez-Ilárduya, María Belén; Ruiz‐Rubio, Leire; Vilas-Vilela, José Luis; Lanceros‐Méndez, S.; Campo, Francisco Javier del

doi:10.1016/j.electacta.2021.139374

Cited by 17 publications

(5 citation statements)

References 62 publications

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“…Raman spectroscopy was also used to characterize the NTGr and LTGr electrodes (Figure 5). The Raman spectrums assign two sharp, distinctive peaks of graphitic materials, the D and G bands [7]. The sp 2 graphitic carbon is represented by the G band, which corresponds to in-plane symmetric C-C stretching.…”

Section: Laser-treated Pencil Lead Characterizationmentioning

confidence: 99%

“…The sp 2 graphitic carbon is represented by the G band, which corresponds to in-plane symmetric C-C stretching. On the other hand, the sp 3 -disordered carbon is represented by the D band, and associated with the distortion of finite crystallit size present in polycrystalline graphite and distorted carbon material [7]. In fact, the Ra man spectra indicated that the ID/IG ratio (density integration) decreased from 0.43 to 0.09 after laser treatment, which reveals that the surface turned more crystalline (Figure 5A) Furthermore, the Raman mapping image for the LTGr electrode shows that, in basically the entire mapped area (Figure 5B), the ID/IG ratio values are lower when compared to th untreated Gr (Figure 5C).…”

Section: Laser-treated Pencil Lead Characterizationmentioning

confidence: 99%

“…In the case of electrodes constructed with pencil lead, the removal of debris becomes one of the most important factors [6]. Furthermore, it was demonstrated that the association of laser scribing and electrochemical treatment was effective in optimizing the graphite structure of the commercial screen-printed electrode, resulting in improved performance [7].…”

Section: Introductionmentioning

confidence: 99%

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Laser-Scribed Pencil Lead Electrodes for Amperometric Quantification of Indapamide

Oliveira,

Lima,

Ameku

et al. 2023

Chemosensors

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Laser engraving is a convenient, fast, one-step, and environmentally friendly technique used to produce more conductive surfaces by local pyrolysis. The laser’s thermal treatment can also remove non-conductive materials from the electrode surfaces and improve electrochemical performance. The improvement was assessed by electrochemical tools such as cyclic voltammograms and electrochemical impedance spectroscopy using [Fe(CN)6]3−/4− and dopamine as redox probes. The electrochemical results observed showed that a treated surface showed an improvement in electron transfer and less resistance to charge transfer. To optimize the electrode performance, it was necessary to search for the most favorable graphite mines and optimize the parameters of the laser machine (laser power, scan rate, and output distance). The resultant material was adequately characterized by Raman spectroscopy and scanning electron microscopy (SEM), where an irregular surface composed of crystalline graphite particles was noticed. Furthermore, as a proof-of-concept, it was applied to detect indapamide (IND) in synthetic urine by flow injection analysis (FIA), a diuretic drug often used by athletes to alter urine composition to hide forbidden substance consumption in doping tests.

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Section: Laser-treated Pencil Lead Characterizationmentioning

confidence: 99%

Section: Laser-treated Pencil Lead Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Laser-Scribed Pencil Lead Electrodes for Amperometric Quantification of Indapamide

Oliveira,

Lima,

Ameku

et al. 2023

Chemosensors

View full text Add to dashboard Cite

show abstract

“…Likewise, DA was detected using laser-scribed commercial carbon SPE using DPV in the presence of an excess of typically found interfering agents, such as AA and UA [89]. Contrary to most investigations that report the creation of carbon structure defects by laser treatment, the benefit of the CO 2 -laser thermal action in ambient conditions increased graphite crystallinity, verified by decreasing the D/G Raman bands ratio [89]. Indeed, it improved the electron transfer rates and enabled simultaneous identification of AA, DA, and UA.…”

Section: Health Monitoringmentioning

confidence: 99%

Laser-Scribed Graphene-Based Electrochemical Sensors: A Review

et al. 2022

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Laser scribing is a technique that converts carbon-rich precursors into 3D-graphene nanomaterial via direct, single-step, and maskless laser writing in environmental conditions and using a scalable approach. It allows simple, fast, and reagentless production of a promising material with outstanding physicochemical features to create novel electrochemical sensors and biosensors. This review addresses different strategies for fabricating laser-scribed graphene (LSG) devices and their association with nanomaterials, polymers, and biological molecules. We provide an overview of their applications in environmental and health monitoring, food safety, and clinical diagnosis. The advantages of their integration with machine learning models to achieve low bias and enhance accuracy for data analysis is also addressed. Finally, in this review our insights into current challenges and perspectives for LSG electrochemical sensors are presented.

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“…No caso de eletrodos construídos com grafite, a remoção de detritos torna-se um dos fatores mais importantes [6]. Além disso, foi demonstrado que a associação de gravação a laser e tratamento eletroquímico foi eficaz na otimização da estrutura de grafite do eletrodo serigrafado comercial, resultando em melhor desempenho [7]. Na literatura, existem muitos estudos utilizando lápis de grafite para aplicações de eletroanálise.…”

Section: Introductionunclassified

Eletrodos de Grafite Tratado a Laser para Quantificação Amperométrica de Indapamida

Toma,

Lima,

Gonçalves

et al. 2024

11º Workshop Do Programa De Mestrado Profissional Tecnologia Em Química E Bioquímica Da USP – AMPT

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A gravação a laser é uma técnica conveniente, rápida, de uma etapa e ecologicamente correta, usada para produzir superfícies mais condutoras por pirólise local. O tratamento térmico do laser também pode remover materiais não condutores das superfícies dos eletrodos e melhorar o desempenho eletroquímico. A melhoria foi avaliada por ferramentas eletroquímicas como voltamogramas cíclicos e espectroscopia de impedância eletroquímica usando [Fe(CN) 6] 3-/4e dopamina como sondas redox. Os resultados eletroquímicos observados mostraram que uma superfície tratada apresentou melhora na transferência de elétrons e menor resistência à transferência de carga. Otimizamos os parâmetros da máquina a laser para alcançar o desempenho eletroquímico aprimorado da mina de grafite, como tipo de grafite e potência do laser, taxa de varredura e distância de saída. O material resultante foi adequadamente caracterizado por espectroscopia Raman e microscopia eletrônica de varredura (MEV), onde foi observada uma superfície irregular composta por partículas cristalinas de grafite. Além disso, como prova de conceito, foi aplicado para detectar indapamida (IND) em urina sintética por análise de injeção em fluxo (FIA), uma droga diurética frequentemente usada por atletas para alterar a composição da urina e ocultar o consumo proibido de substâncias. em testes de doping.Palavras-chave: laser; sensor eletroquímico; diurético; análise por injeção em fluxo (FIA).

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Laser-activated screen-printed carbon electrodes for enhanced dopamine determination in the presence of ascorbic and uric acid

Cited by 17 publications

References 62 publications

Laser-Scribed Pencil Lead Electrodes for Amperometric Quantification of Indapamide

Laser-Scribed Pencil Lead Electrodes for Amperometric Quantification of Indapamide

Laser-Scribed Graphene-Based Electrochemical Sensors: A Review

Eletrodos de Grafite Tratado a Laser para Quantificação Amperométrica de Indapamida

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