Pregled bibliografske jedinice broj: 1235468
Redox cycling in bottom-up designed porous coaxial twin-electrodes for efficient bioelectroanalysis
Redox cycling in bottom-up designed porous coaxial twin-electrodes for efficient bioelectroanalysis // XXVII International symposium on Bioelectrochemistry and Bioenergetics
Antwerpen, Belgija, 2022. str. 96-96 (predavanje, međunarodna recenzija, sažetak, znanstveni)
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Naslov
Redox cycling in bottom-up designed porous coaxial
twin-electrodes for efficient bioelectroanalysis
Autori
Šafarik, Tatjana ; Karajić, Aleksandar ; Reculusa, Stephane ; Mano, Nicolas ; Kuhn, Alexander
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
XXVII International symposium on Bioelectrochemistry and Bioenergetics
/ - , 2022, 96-96
Skup
27th International symposium on Bioelectrochemistry and Bioenergetics (BES2022)
Mjesto i datum
Antwerpen, Belgija, 03.04.2022. - 07.04.2022
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
porous gold electrode ; bottom-up technique ; micrometer device ; biofuel cell bioelectroanalysis ;
Sažetak
This oral presentation received the award for the best abstract. Macroporous electrodes are used for the elaboration of bioelectrochemical devices due to their unique structure which provides higher surface areas than their flat homologues while maintaining the geometric surface as small as possible. Here, we report the electrochemical elaboration and characterization of a three- dimensional co-axial macroporous twin-electrode obtained by following a low-cost and bottom-up approach. As illustrated in Figure 1, the nanoengineered device is based on two threaded cylindrical porous gold microelectrodes for which the porosity, the thicknesses of the gold layers and the space between the inner and outer electrode can be tuned at will. Due to the confined architecture and the small distance between both inner and outer electrodes, such design can be used for signal amplification in analytical chemistry by redox cycling. A molecule can participate several times in the electron exchange reaction by diffusing between both electrodes. In addition, by using an architecture with a cylindrical geometry, it is possible to improve the mass transport of the electroactive species towards the electrode surface, which is one of the main problems to solve for electrochemical devices, especially in the field of implantable biofuel cells and biosensors. The resulting signal amplification, combined with a straightforward synthesis strategy of the architecture allows envisioning numerous (bio)analytical applications.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
