Mucilage-capped silver nanoparticles for glucose electrochemical sensing and fuel cell applications

Abstract

A simple, cost-effective and green mucilage-capped silver nanoparticles (Mucilage-AgNPs) modified glassy carbon electrode (GC) composite was constructed for efficient and facile electrochemical oxidation of glucose for the first time.

Signaling strategies of silver nanoparticles in optical and electrochemical biosensors: considering their potential for the point-of-care

“…The advantages are numerous and similar to those found for other metal NPs, and it is not always clear whether silver is the optimal material indeed or can be replaced by other metal NPs. For example, a glassy-carbon electrode was modified using eco-friendly synthesized mucilage-AgNPs to enable the detection of glucose in human blood samples [ 103 ]. By covering the electrode with AgNPs, the mass transport to the surface increases due to convergent rather than linear diffusion [ 104 ].…”

“…To avoid false results due to measuring artifacts, a fundamental theoretical knowledge of the processes on the electrode is needed, as already Campbell and Compton [ 104 ] discussed in their review 2010. Meanwhile, researchers, such as Khalifa et al [ 103 ], focus more on a fundamental understanding of the processes rather than merely empirical studies. If specificity and stability of the sensor can be guaranteed, for example, by careful surface modification, and the detection works also in biological media, this method would indeed be good for a POC self-testing approach due to the ease of electrode production and handling, high-cost efficiency, and sensitivity.…”

Recent advances in silver nanoparticle-based electrochemical sensors for determining organic pollutants in water: a review

“…AgNP aggregation-based electrochemical sensors were reported for determining Amyloid-β oligomers (AβOs) and gonadotropins [142][143] . Additionally, electrochemical sensors based on AgNP oxidation amplification and inhibition were used to assess T4 PNK, p53 protein, biomarker NS1, influenza virus H7, gastrodin, glucose, and DNA 113,119,142,[144][145][146][147] . Moreover, analyte-based electrochemical sensors using AgNPs as electrode modifiers were used to detect caffeine, creatinine, glucose, and estriol…”

“…Organic pollutants could be detected at AgNP-modified electrodes on the basis of their oxidation or reduction. AgNPs not only increase the electrode surface area but also act as a catalyst for organic pollutant oxidation/reduction 47,113 . They also have an excellent conductivity that makes electron transfer easier 106 .…”

Nanomaterial‐Based Electrochemical Sensors: Mechanism, Preparation, and Application in Biomedicine

“…Nanomaterials with unique electrocatalytic properties, [ 5 ] strong adsorption capacity, [ 6 ] extremely small size, [ 7 ] large surface area, [ 8 ] and facile surface modification [ 9 ] have demonstrated their appropriateness for biosensing applications in the past decades. [ 10 ] In particular, nanomaterials play the multifunctional roles in electrochemical sensors, including 1) sample separation and preconcentration; 2) bioreceptor immobilization; and 3) signal enhancement [2b,9a,11] .…”