Nanobiosensors and Nanobioanalyses

Vestergaard, Mun’delanji C.; Kerman, Kağan; Hsing, I‐Ming; Tamiya, Eiichi

doi:10.1007/978-4-431-55190-4

Cited by 15 publications

(1 citation statement)

References 512 publications

(621 reference statements)

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“…The electrode components are constructed by printing different inks in successive layers to create a final product. The printed electrodes often require curing procedures before use to anneal the layer of ink together with the substrate underneath for better stability [ 48 ]. The WE and CE are usually printed with the same conductive ink material, while the RE is usually printed with silver/silver chloride (Ag/AgCl) conductive ink, to replicate the reference Ag/AgCl electrode in the standard electrochemical set-up.…”

Section: Printed Electrochemical Sensors and Electrochemical Techniqu...mentioning

confidence: 99%

Two-Dimensional Non-Carbon Materials-Based Electrochemical Printed Sensors: An Updated Review

Falina

Anuar

Shafiee

et al. 2022

Sensors

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Recently, there has been increasing interest in electrochemical printed sensors for a wide range of applications such as biomedical, pharmaceutical, food safety, and environmental fields. A major challenge is to obtain selective, sensitive, and reliable sensing platforms that can meet the stringent performance requirements of these application areas. Two-dimensional (2D) nanomaterials advances have accelerated the performance of electrochemical sensors towards more practical approaches. This review discusses the recent development of electrochemical printed sensors, with emphasis on the integration of non-carbon 2D materials as sensing platforms. A brief introduction to printed electrochemical sensors and electrochemical technique analysis are presented in the first section of this review. Subsequently, sensor surface functionalization and modification techniques including drop-casting, electrodeposition, and printing of functional ink are discussed. In the next section, we review recent insights into novel fabrication methodologies, electrochemical techniques, and sensors’ performances of the most used transition metal dichalcogenides materials (such as MoS2, MoSe2, and WS2), MXenes, and hexagonal boron-nitride (hBN). Finally, the challenges that are faced by electrochemical printed sensors are highlighted in the conclusion. This review is not only useful to provide insights for researchers that are currently working in the related area, but also instructive to the ones new to this field.

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Section: Printed Electrochemical Sensors and Electrochemical Techniqu...mentioning

confidence: 99%

Two-Dimensional Non-Carbon Materials-Based Electrochemical Printed Sensors: An Updated Review

Falina

Anuar

Shafiee

et al. 2022

Sensors

View full text Add to dashboard Cite

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Gold Nanocatalysts Towards Digital Sensing Probes with Electrochemiluminescence Based Micro Electrodes Array

et al. 2021

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The authors have found that gold nanoparticles (AuNP) function as nanocatalysts for the generation of reactive oxygen species such as hydrogen peroxide from dissolved oxygen in coexistence with tris(hydroxymethyl)aminomethane (Tris) or N‐[tris(hydroxymethyl) methyl]glycine (Tricine) chemicals, and that these can be evaluated by luminol electrochemi‐luminescence (ECL). In the present study, we investigated the effects of reaction time, particle concentration, and temperature on the catalytic properties of gold nanoparticles. Unlike biocatalysts such as enzymes, the gold nanoparticles showed an Arrhenius plot‐like increase in activity with temperature without inactivation. In addition, the catalytic activity of the gold nanoparticles varied with the size and shape of the nanoparticles for spherical gold nanoparticles of different sizes (5, 15, 30, 50 and 400 nm) and the activity per nanoparticle increased with the size and surface area. When compared activity per surface area, 15 nm nanoparticles showed higher activity. We prepared gold nanoparticles with nanoflower (AuNF) structure of approx.200 nm in size which showed higher activity per particle than 400 nm spherical particles. The increase in surface area and the difference in surface condition may have influenced these results. We also prepared microelectrode arrays capable of holding small amounts of nl‐pL test reagents. They showed the possibility of imaging ECL of the activity of gold nanoparticles at the level of tens of nanoparticles which could lead to nanocatalysts as probes for digital analysis.

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