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      Screen-Printed Electrodes Modified with Metal Nanoparticles for Small Molecule Sensing

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          Abstract

          Recent progress in the field of electroanalysis with metal nanoparticle (NP)-based screen-printed electrodes (SPEs) is discussed, focusing on the methods employed to perform the electrode surface functionalization, and the final application achieved with different types of metallic NPs. The ink mixing approach, electrochemical deposition, and drop casting are the usual methodologies used for SPEs’ modification purposes to obtain nanoparticulated sensing phases with suitable tailor-made functionalities. Among these, applications on inorganic and organic molecule sensing with several NPs of transition metals, bimetallic alloys, and metal oxides should be highlighted.

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          Semiconductor metal oxide gas sensors: A review

          Ananya Dey (2018)
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            Size- and shape-dependent catalytic performances of oxidation and reduction reactions on nanocatalysts

            Shaowen Cao, Franklin Tao, Yu R. Tang … (2016)
            Heterogeneous catalysis is one of the most important chemical processes of various industries performed on catalyst nanoparticles with different sizes or/and shapes. In the past two decades, the catalytic performances of different catalytic reactions on nanoparticles of metals and oxides with well controlled sizes or shapes have been extensively studied thanks to the spectacular advances in syntheses of nanomaterials of metals and oxides. This review discussed the size and shape effects of catalyst particles on catalytic activity and selectivity of reactions performed at solid-gas or solid-liquid interfaces with a purpose of establishing correlations of size- and shape-dependent chemical and structural factors of surface of a catalyst with the corresponding catalytic performances toward understanding of catalysis at a molecular level.
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              Graphene/AuNPs/chitosan nanocomposites film for glucose biosensing.

              Changsheng Shan, Huafeng Yang, Dongxue Han … (2010)
              A novel glucose biosensor based on immobilization of glucose oxidase in thin films of chitosan containing nanocomposites of graphene and gold nanoparticles (AuNPs) at a gold electrode was developed. The resulting graphene/AuNPs/chitosan composites film exhibited good electrocatalytical activity toward H(2)O(2) and O(2). The wide linear response to H(2)O(2) ranging from 0.2 to 4.2 mM (R=0.998) at -0.2V, high sensitivity of 99.5 microA mM(-1) cm(-2) and good reproducibility were obtained. The good electrocatalytical activity might be attributed to the synergistic effect of graphene and AuNPs. With glucose oxidase (GOD) as a model, the graphene/AuNPs/GOD/chitosan composite-modified electrode was constructed through a simple casting method. The resulting biosensor exhibited good amperometric response to glucose with linear range from 2 to 10 mM (R=0.999) at -0.2V and from 2 to 14 mM (R=0.999) at 0.5 V, good reproducibility and detection limit of 180 microM. Glucose concentration in human blood was studied preliminarily. From 2.5 to 7.5 mM, the cathodic peak currents of the biosensor decrease linearly with increasing the glucose concentrations. The graphene/AuNPs/GOD/chitosan composites film shows prominent electrochemical response to glucose, which makes a promising application for electrochemical detection of glucose. Copyright 2009 Elsevier B.V. All rights reserved.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Biosensors (Basel)
                Journal ID (iso-abbrev): Biosensors (Basel)
                Journal ID (publisher-id): biosensors
                Title: Biosensors
                Publisher: MDPI
                ISSN (Electronic): 2079-6374
                Publication date (Electronic): 01 February 2020
                Publication date Collection: February 2020
                Volume: 10
                Issue: 2
                Electronic Location Identifier: 9
                Affiliations
                Metrohm DropSens S.L., Edificio CEEI-Parque Tecnológico de Asturias, 33428 Llanera, Spain; daniel.antuna@ 123456metrohm.com (D.A.-J.); begona.gonzalez@ 123456metrohm.com (M.B.G.-G.); david.hernandez@ 123456metrohm.com (D.H.-S.)
                Author notes
                [* ]Correspondence: pablo.fanjul@ 123456metrohm.com ; Tel.: +34-985-277-685
                Author information
                https://orcid.org/0000-0002-9224-1666
                Article
                Publisher ID: biosensors-10-00009
                DOI: 10.3390/bios10020009
                PMC ID: 7167755
                PubMed ID: 32024126
                SO-VID: 97cb0d72-eef2-41b2-beaf-bcd6ee212a6e
                Copyright © © 2020 by the authors.
                License:

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                Date received : 17 January 2020
                Date accepted : 29 January 2020
                Categories
                Subject: Review

                Keywords: metal nanoparticles,bimetallic alloys,metal oxides,screen printed electrode,ink-mixing,drop casting,electrodeposition,electrocatalysis,enzymatic sensor,enzyme-free sensor
                Data availability:
                Keywords: metal nanoparticles, bimetallic alloys, metal oxides, screen printed electrode, ink-mixing, drop casting, electrodeposition, electrocatalysis, enzymatic sensor, enzyme-free sensor

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