Cheap and disposable gold and silver electrodes: Trends in the application of compact discs and digital versatile discs for electroanalytical chemistry

Honeychurch, Kevin C.

doi:10.1016/j.trac.2017.04.013

Cited by 12 publications

(5 citation statements)

References 88 publications

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“…24 Reaction with nitric acid within minutes or physical removal using adhesive scotch tape were described to enable the thin gold layer accessible as an electrochemical substrate. 25 Chemical modification with multiple-walled carbon nanotubes, 26 silver nanoparticles (AgNPs) 27 and platinum film 28 has been reported for the development of improved electrochemical sensors using such an inexpensive source of electrodes compared to conventional disc gold electrodes.…”

Section: Introductionmentioning

confidence: 99%

Chemically Reduced Graphene Oxide on Gold Electrodes from Recordable CDs: Characterization and Potential Sensing Applications

Silva¹,

Rocha²,

Silva³

et al. 2020

J. Braz. Chem. Soc.

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This work presents the development and characterization of a new chemically modified electrode exploiting recordable Au-rewritable compact discs (AuCDs) as substrate for drop casting of a chemically-reduced graphene-oxide slurry focusing on simple and low-cost electrochemical sensors. Increase in electrochemical responses in cyclic voltammetric and amperometric measurements were achieved using the proposed sensor. Both scanning electron microscopy and atomic force microscopy data showed increase in rugosity (about 46% higher) for the chemically reduced graphene oxide (CRGO) AuCD surface while Raman spectroscopy confirmed the presence of structural defects of graphene. The calculated charge transfer resistances (R ct) and heterogeneous electron transfer rate constants (k 0) were 1638 Ω and 0.0022 cm s-1 for the bare substrate, and 91 Ω and 0.0027 cm s-1 for the modified electrode, evidencing the facilitated electron transfer of the CRGO-AuCD surface. The dopamine (DP) amperometric detection using CRGO-AuCD provided low detection limit (0.12 µg L-1) compared with other modified electrodes already reported, high precision (relative standard deviation (RSD) < 5%) and analytical frequency (370 h-1). As a proof-of-concept, DP determination in synthetic saliva samples was performed and a satisfactory recovery value (98.6 ± 0.9%) was obtained.

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Section: Introductionmentioning

confidence: 99%

Chemically Reduced Graphene Oxide on Gold Electrodes from Recordable CDs: Characterization and Potential Sensing Applications

Silva¹,

Rocha²,

Silva³

et al. 2020

J. Braz. Chem. Soc.

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“…Additionally, there is a need to reduce the complexity and cost of fabricating stretchable electronic prototype devices, which will advance the potential of manufacturing and reduce the required skill level to fabricate 13,[29][30][31][32] . To date, researchers have explored alternative uses for CDs to develop gold and silver electrodes [33][34][35][36] , detect metal ions (e.g., Pb, Hg, Cu, etc.) [37][38][39] , screen organic compounds (e.g., DNA, cysteine, dopamine, etc.)…”

mentioning

confidence: 99%

Upcycling Compact Discs for Flexible and Stretchable Bioelectronic Applications

et al. 2022

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Electronic waste is a global issue brought about by the short lifespan of electronics. Viable methods to relieve the inundated disposal system by repurposing the enormous amount of electronic waste remain elusive. Inspired by the need for sustainable solutions, this study resulted in a multifaceted approach to upcycling compact discs. The once-ubiquitous plates can be transformed into stretchable and flexible biosensors. Our experiments and advanced prototypes show that effective, innovative biosensors can be developed at a low-cost. An affordable craft-based mechanical cutter allows pre-determined patterns to be scored on the recycled metal, an essential first step for producing stretchable, wearable electronics. The active metal harvested from the compact discs was inert, cytocompatible, and capable of vital biopotential measurements. Additional studies examined the material’s resistive emittance, temperature sensing, real-time metabolite monitoring performance, and moisture-triggered transience. This sustainable approach for upcycling electronic waste provides an advantageous research-based waste stream that does not require cutting-edge microfabrication facilities, expensive materials, and high-caliber engineering skills.

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“…Ag layer, served as reflective layer on CD or DVD, 53 could be used as the sacrifice metal layer and readout of the bipolar electrochemical sensor system. 53−55 It would supply a new, simple, safe, and profitable way of Ag recycle from waste CD compared to traditional tough and dangerous recycle method.…”

mentioning

confidence: 99%

“…Ag layer, served as reflective layer on CD or DVD, could be used as the sacrifice metal layer and readout of the bipolar electrochemical sensor system. − It would supply a new, simple, safe, and profitable way of Ag recycle from waste CD compared to traditional tough and dangerous recycle method. Taking use of Ag layer recycled from CD or DVD would further cut the sensor cost, increase sensor uniformity, and simplify sensor fabrication procedure.…”

mentioning

confidence: 99%

Integrating Electrochemical and Colorimetric Sensors with a Webcam Readout for Multiple Gas Detection

Qin

Jiao

et al. 2019

Anal. Chem.

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Multisensor detectors have merits of low cost, compact size, and capability of supplying accurate and reliable information otherwise hard to obtain by any single sensors. They are therefore highly desired in various applications. Despite the advantages and needs, they face great challenges in technique especially when integrating sensors with different sensing principles. To bridge the gap between the demand and technique, we here demonstrated an integration of electrochemical and colorimetric sensors with a webcam readout for multiple gas detection. Designed with two parallel gas channels but independent sensor cells, the dual-sensor detector could simultaneously detect each gas from their gas mixture by analysis of the group photo of the two sensors. Using Ag electro-dissolution as reporter, the bipolar electrochemical sensor achieved quantitative analysis for the first time thanks to application of pulse voltage. The sacrificed Ag layer used in the bipolar electrochemical (EC) sensor was recycled from CD, which further decreased the sensor cost and supplied a new way of CD recycling. The EC O2 sensor response, edge displacement of Ag layer due to electrochemical dissolution, has a linear relationship with O2 concentration ranging from 0 to 30% and has good selectivity to common oxidative gases. The colorimetric NO2 sensor linearly responded to NO2 concentrations ranging from 0 to 230 ppb with low detection limit of 10 ppb, good selectivity, and humidity tolerance. This integration method could be extended to integrating other gas sensors.

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Cheap and disposable gold and silver electrodes: Trends in the application of compact discs and digital versatile discs for electroanalytical chemistry

Cited by 12 publications

References 88 publications

Chemically Reduced Graphene Oxide on Gold Electrodes from Recordable CDs: Characterization and Potential Sensing Applications

Chemically Reduced Graphene Oxide on Gold Electrodes from Recordable CDs: Characterization and Potential Sensing Applications

Upcycling Compact Discs for Flexible and Stretchable Bioelectronic Applications

Integrating Electrochemical and Colorimetric Sensors with a Webcam Readout for Multiple Gas Detection

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