1,721,069 research outputs found
Laccase and tyrosinase on electrochemically reduced GO and MWCNTs hybrid for the development of polyphenols biosensors
No full textTransistor elettrochimico organico a base di polimero conduttore e nanoparticelle di alogenuro di Ag, AgX (X = Cl, I, Br) come sensore chimico
No full textL’invenzione si riferisce a un nuovo materiale che permette di realizzare un sensore elettrochimico a due terminali che mantiene le capacità di trasduzione e di amplificazione di un transistor a tre terminali. Il materiale può essere progettato in modo da essere sensibile a diversi anioni quali ad esempio cloruri, bromuri, ioduri, e solfuri presenti nel liquido sotto test. Questi materiali innovativi possono essere stampati su vari substrati quali vetro, plastica e tessuto aprendo le porte a nuove tipologie di sensori non realizzabili con le tecnologie tradizionali, ad esempio completamente implementati all’interno di un tessuto o capo di abbigliamento
A new electrochemical sensor for OH radicals detection
No full textA new, cheap modified electrode for indirect detection of OH radical is described. A glassy carbon (GC) electrode was modified with a polyphenol film prepared by oxidative potentiostatic ectropolymerization of 0.05 M phenol in 1 M H2SO4. The film having a thickness of ~10 nm perfectly covered the GC surface and inhibited the charge transfer of many redox species. The degradation of the polyphenol film, that was induced by OH radicals generated by Fenton reaction or by H2O2 photolysis, is the analytical signal and it was evaluated by cyclic voltammetry and chronoamperometry using the redox probe Ru(NH3)63+. Some simulations of the kinetics of the reactions occurring in the solution bulk and near the electrode surface were carried out to fully understand the processes that lead to the analytical signal. The modified electrode was used to evaluate the performances of different TiO2-based photocatalysts and the results were successfully compared with those obtained from a traditional HPLC method that is based on the determination of the hydroxylation products of salicylic acid
A wearable sensor for monitoring neurotransmitters in sweat for therapeutic and diagnostic analyses
No full textA novel Bioelectronic pH sensor with enhanced sensitivity based on an Organic Electrochemical Transistor
No full textLayered Double Hydroxides Prepared by Electrodeposition as Active Materials for Energy Applications
No full textElectrosynthesis of Layered Double Hydroxides as active materials for sensing, energy, and catalysis
No full textCarbon nanomaterials as glassy carbon modifiers for electrochemical devices with boosted activity
Full text linkGlassy carbon electrodes (GCEs) modified with a composite made of multi-walled carbon nanotubes (MWCNTs)
and electrochemically reduced graphene oxide (ERGO) were employed to investigate the electroactivity of
dopamine (DA) an catechol (CA) which resulted into a significant improvement of the analytical performances.
The same composite was used to support tyrosinase or laccase in order to fabricate amperometric biosensors for
determining total polyphenols in juice samples, based on the reduction of the enzymatically produced quinone.
Carbon based nanomaterials were also exploited to induce the electrosynthesis of layered double hydroxides
(LDHs). Using glucose as target, electrocatalytic activity was found to be higher than when LDH was deposited on
bare GCE
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