Nanosensors for the detection of hydrogen peroxide

Clausmeyer, Jan; Actis, Paolo; Córdoba, Ainara López; Korchev, Yuri; Schuhmann, Wolfgang

doi:10.1016/j.elecom.2013.12.015

Cited by 62 publications

(49 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…13,14,19,20 At the same time, nanopipettes allow for pressure-or voltage-driven highly localised delivery of reagents. 9,11,12,27 Nanoclusters of Ag are electrochemically deposited on carbon nanoelectrodes. Doublebarrel Θ-shaped quartz capillaries are pulled to comprise dual nanopipettes.…”

Section: Resultsmentioning

confidence: 99%

The oxygen reduction reaction at the three-phase boundary: nanoelectrodes modified with Ag nanoclusters

et al. 2016

Self Cite

View full text Add to dashboard Cite

Silver nanoclusters are deposited on bifunctional Θ-shaped nanoelectrodes consisting of a carbon nanoelectrode combined with a hollow nanopipette. The Θ-nanoelectrodes are used as model systems to study interfacial mass transport in gas diffusion electrodes and in particular oxygen-depolarized cathodes (ODC) for the oxygen reduction reaction (ORR) in chlor-alkali electrolysers. By local delivery of O gas to the electroactive Ag nanoclusters through the adjacent nanopipette, enhanced currents for the ORR at the Ag nanoparticles are recorded which are not accountable when considering the low solubility and slow diffusion of O in highly alkaline media. Instead, local oversaturation of O leads to current enhancement at the Ag nanoclusters. Due to the intrinsic high mass transport rates at the nanometric electrodes accompanied by local delivery of reactants, the method generally allows to study electrochemical reactions at single nanoparticles beyond the limitations induced by slow diffusion and low reactant concentration. Kinetic and mechanistic information, for instance derived from Tafel slopes, can be obtained from kinetic regimes not accessible to standard techniques.

show abstract

Section: Resultsmentioning

confidence: 99%

The oxygen reduction reaction at the three-phase boundary: nanoelectrodes modified with Ag nanoclusters

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recent reports on the use of nanopipettes and nanosensors technology for the detection of biomolecules in confined environments such as single cells and neurons (Actis 2013, Clausmeyer 2014, Schrlau 2009). These nano-enabled devices open doors for the real-time investigation of physiological processes at the single-cell level with high spatial resolution and minimal tissue damage.…”

Section: Challenges Opportunities and Future Perspectivementioning

confidence: 99%

Recent Developments in Electrochemical Sensors for the Detection of Neurotransmitters for Applications in Biomedicine

2015

View full text Add to dashboard Cite

Neurotransmitters are important biological molecules that are essential to many neurophysiological processes including memory, cognition, and behavioral states. The development of analytical methodologies to accurately detect neurotransmitters is of great importance in neurological and biological research. Specifically designed microelectrodes or microbiosensors have demonstrated potential for rapid, real-time measurements with high spatial resolution. Such devices can facilitate study of the role and mechanism of action of neurotransmitters and can find potential uses in biomedicine. This paper reviews the current status and recent advances in the development and application of electrochemical sensors for the detection of small-molecule neurotransmitters. Measurement challenges and opportunities of electroanalytical methods to advance study and understanding of neurotransmitters in various biological models and disease conditions are discussed.

show abstract

“…Unfortunately, the use of PB at nanoelectrodes is limited by the poor stability of the PB film due to the similar scale of electrode size and layer thickness. Clausmeyer et al overcame this limitation by fabricating pulled pipette carbon nanoelectrodes 49 containing a nanocavity and electrodepositing the PB film within the cavity. The use of the cavity increases the film stability as any part of the film which becomes dissolved or detached is trapped within the cavity and quickly redeposited on the nanoelectrode.…”

Section: Healthmentioning

confidence: 99%