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Dummy Molecularly Imprinted Polymers Using DNP as a Template Molecule for Explosive Sensing and Nitroaromatic Compound Discrimination. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9090255] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This work reports a rapid, simple and low-cost voltammetric sensor based on a dummy molecularly imprinted polymer (MIP) that uses 2,4-dinitrophenol (DNP) as a template for the quantification of 2,4,6-trinitrotoluene (TNT) and DNP, and the identification of related substances. Once the polymer was synthesised by thermal precipitation polymerisation, it was integrated onto a graphite epoxy composite (GEC) electrode via sol–gel immobilisation. Scanning electron microscopy (SEM) was performed in order to characterise the polymer and the sensor surface. Responses towards DNP and TNT were evaluated, displaying a linear response range of 1.5 to 8.0 µmol L−1 for DNP and 1.3 to 6.5 µmol L−1 for TNT; the estimated limits of detection were 0.59 µmol L−1 and 0.29 µmol L−1, for DNP and TNT, respectively. Chemometric tools, in particular principal component analysis (PCA), demonstrated the possibilities of the MIP-modified electrodes in nitroaromatic and potential interfering species discrimination with multiple potential applications in the environmental field.
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Bonet-San-Emeterio M, Felipe Montiel N, del Valle M. Graphene for the Building of Electroanalytical Enzyme-Based Biosensors. Application to the Inhibitory Detection of Emerging Pollutants. NANOMATERIALS 2021; 11:nano11082094. [PMID: 34443924 PMCID: PMC8400611 DOI: 10.3390/nano11082094] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 08/13/2021] [Accepted: 08/13/2021] [Indexed: 12/21/2022]
Abstract
Graphene and its derivates offer a wide range of possibilities in the electroanalysis field, mainly owing to their biocompatibility, low-cost, and easy tuning. This work reports the development of an enzymatic biosensor using reduced graphene oxide (RGO) as a key nanomaterial for the detection of contaminants of emerging concern (CECs). RGO was obtained from the electrochemical reduction of graphene oxide (GO), an intermediate previously synthesized in the laboratory by a wet chemistry top-down approach. The extensive characterization of this material was carried out to evaluate its proper inclusion in the biosensor arrangement. The results demonstrated the presence of GO or RGO and their correct integration on the sensor surface. The detection of CECs was carried out by modifying the graphene platform with a laccase enzyme, turning the sensor into a more selective and sensitive device. Laccase was linked covalently to RGO using the remaining carboxylic groups of the reduction step and the carbodiimide reaction. After the calibration and characterization of the biosensor versus catechol, a standard laccase substrate, EDTA and benzoic acid were detected satisfactorily as inhibiting agents of the enzyme catalysis obtaining inhibition constants for EDTA and benzoic acid of 25 and 17 mmol·L−1, respectively, and a maximum inhibition percentage of the 25% for the EDTA and 60% for the benzoic acid.
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Flauzino JMR, Peres RCS, Alves LM, Vieira JG, Dos Santos JG, Brito-Madurro AG, Madurro JM. DNA electrochemical biosensor for detection of Alicyclobacillus acidoterrestris utilizing Hoechst 33258 as indicator. Bioelectrochemistry 2021; 140:107801. [PMID: 33789176 DOI: 10.1016/j.bioelechem.2021.107801] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 03/10/2021] [Accepted: 03/14/2021] [Indexed: 01/18/2023]
Abstract
Alicyclobacillus acidoterrestris is an acidophilic and thermophilic bacterium present in the soil, often associated with the spoilage of acidic juices, such as orange juice. Their spores resist pasteurization and, when reactivated, modify the organoleptic properties of the juice, making it unsuitable for consumption, due mainly to production of guaiacol. Biosensors are detection devices that respond quickly and are easy to handle, with great potential for use in the juice production chain. In this context, this work reports an electrochemical genosensor for detection of A. acidoterrestris, based on a graphite electrode modified with electrochemically reduced graphene oxide, a polymer derived from 3-hydroxybenzoic acid and a specific DNA probe sequence complementary with the genomic DNA of A. acidoterrestris. Detection of the target was performed by monitoring the oxidation peak of the Hoechst 33258, a common DNA stainer. The genosensor detection limit was 12 ng mL-1 and it kept 77% of response after ten weeks, and a test showed that orange juice does not interfere with bacteria lysate detection. This biosensor is the first platform for electrochemical detection of the genomic DNA of A. acidoterrestris in the literature, and the first to use Hoechst 33258 as indicator with whole genomic DNA molecules.
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Affiliation(s)
- José M R Flauzino
- Institute of Biotechnology, Federal University of Uberlandia, Uberlandia, Brazil.
| | - Rafaela C S Peres
- Institute of Biotechnology, Federal University of Uberlandia, Uberlandia, Brazil
| | - Lívia M Alves
- Institute of Biotechnology, Federal University of Uberlandia, Uberlandia, Brazil
| | - Jussara G Vieira
- Institute of Chemistry, Federal University of Uberlandia, Uberlandia, Brazil
| | - Júlia G Dos Santos
- Faculty of Chemistry Engineering, Federal University of Uberlândia, Uberlandia, Brazil
| | - Ana G Brito-Madurro
- Institute of Biotechnology, Federal University of Uberlandia, Uberlandia, Brazil
| | - João M Madurro
- Institute of Chemistry, Federal University of Uberlandia, Uberlandia, Brazil
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Amiri M, Nekoueian K, Saberi RS. Graphene-family materials in electrochemical aptasensors. Anal Bioanal Chem 2020; 413:673-699. [PMID: 32939567 DOI: 10.1007/s00216-020-02915-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 08/02/2020] [Accepted: 08/25/2020] [Indexed: 02/07/2023]
Abstract
The study of graphene-based carbon nanocomposites has remarkably increased in recent years. Functionalized graphene-based nanostructures, including graphene oxide and reduced graphene oxide, have great potential as new innovative electrode materials in the fabrication of novel electrochemical sensors. Electrochemical sensors based on aptamers attracted great attention because of their high sensitivity and selectivity, and simple instrumentation, as well as low production cost. Aptamers as a potent alternative to antibodies are functional nucleic acids with a high tendency to specific analytes. Electrochemical aptasensors show specific recognition ability for a wide range of analytes. Although aptamers are selected in vitro in contrast to antibodies, they are interesting due to advantages like high stability, easy chemical modifications, and the potential to be employed in nanostructured device fabrication or electrochemical sensing devices. Recently, new nanomaterials have shown a significant impact on the production of electrochemical sensors with high efficiency and performance. This review aims to give an outline of electrochemical aptasensors based on the graphene family materials and discuss the detection mechanism in this type of aptasensors. The present review summarizes some of the recent achievements in graphene-based aptasensors and includes their recent electroanalytical applications. Graphical Abstract Graphical Abstract.
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Affiliation(s)
- Mandana Amiri
- Department of Chemistry, University of Mohaghegh Ardabili, Daneshgah Street, Ardabil, 56199-11367, Iran.
| | - Khadijeh Nekoueian
- Department of Chemistry, University of Mohaghegh Ardabili, Daneshgah Street, Ardabil, 56199-11367, Iran
| | - Reyhaneh Sadat Saberi
- East Sage Investigative Corporation, Isfahan Science and Technology Town, Isfahan, 8415683111, Iran
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5
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Electrochemical biosensors based on nucleic acid aptamers. Anal Bioanal Chem 2020; 412:55-72. [PMID: 31912182 DOI: 10.1007/s00216-019-02226-x] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 10/12/2019] [Accepted: 10/18/2019] [Indexed: 02/07/2023]
Abstract
During recent decades, nucleic acid aptamers have emerged as powerful biological recognition elements for electrochemical affinity biosensors. These bioreceptors emulate or improve on antibody-based biosensors because of their excellent characteristics as bioreceptors, including limitless selection capacity for a large variety of analytes, easy and cost-effective production, high stability and reproducibility, simple chemical modification, stable and oriented immobilization on electrode surfaces, enhanced target affinity and selectivity, and possibility to design them in target-sensitive 3D folded structures. This review provides an overview of the state of the art of electrochemical aptasensor technology, focusing on novel aptamer-based electroanalytical assay configurations and providing examples to illustrate the different possibilities. Future prospects for this technology are also discussed. Graphical abstract.
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Cao SH, Li LH, Wei WY, Feng Y, Jiang WL, Wang JL, Zhang XP, Cai SH, Chen Z. A label-free and ultrasensitive DNA impedimetric sensor with enzymatic and electrical dual-amplification. Analyst 2019; 144:4175-4179. [PMID: 31237576 DOI: 10.1039/c9an00682f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this work, we report a facile, sensitive, selective, and reproducible DNA impedimetric sensor device. We demonstrate that, combined with exonuclease III, the easily prepared electrochemically reduced graphene oxide (rGO) could be a desirable platform to amplify signals in electrochemical impedance spectroscopy for ultrasensitive DNA detection. Guided by enzyme assisted target recycling, efficient interfacial tuning can be obtained, from the situation with high impedance caused by single-stranded DNA probes directly adsorbed onto rGO to the one with low impedance due to the continuous desorption of target-probe DNA hybrids and the consequent digestion of DNA probes. Just a few DNA targets can specifically trigger the enzymatic digestion of a large number of DNA probes. It is the excellent electrical conductivity of rGO that further enlarges the changes of electron transfer resistance after the removal of DNA probes. As a result of synergistically combining both enzymatic and electrical amplification, the enlarged changes of impedimetric signals can be measured to sensitively report DNA targets. The specificity has been guaranteed by the intrinsic recognition of hybrids through both rGO and exonuclease III. A limit of detection as low as 10 aM target DNA in the matrix of cell culture medium, as well as a wide linear range and good discrimination of mismatched sequences even at the one-base level, suggests its great application prospect in biosensing and biomedical analysis. It also has other advantages including easy operation, low cost, and convenient regeneration, with more competitive performance in developing impedimetric biosensors.
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Affiliation(s)
- Shuo-Hui Cao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Electronic Science, Xiamen University, Xiamen 361005, P. R. China.
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Bonet-San-Emeterio M, González-Calabuig A, del Valle M. Artificial Neural Networks for the Resolution of Dopamine and Serotonin Complex Mixtures Using a Graphene-Modified Carbon Electrode. ELECTROANAL 2019. [DOI: 10.1002/elan.201800525] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Marta Bonet-San-Emeterio
- Sensors and Biosensors Group, Department of Chemistry; Universitat Autònoma de Barcelona; Edifici Cn 08193 Bellaterra Barcelona Spain
| | - Andreu González-Calabuig
- Sensors and Biosensors Group, Department of Chemistry; Universitat Autònoma de Barcelona; Edifici Cn 08193 Bellaterra Barcelona Spain
| | - Manel del Valle
- Sensors and Biosensors Group, Department of Chemistry; Universitat Autònoma de Barcelona; Edifici Cn 08193 Bellaterra Barcelona Spain
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Silva NFD, Magalhães JMCS, Barroso MF, Oliva-Teles T, Freire C, Delerue-Matos C. In situ formation of gold nanoparticles in polymer inclusion membrane: Application as platform in a label-free potentiometric immunosensor for Salmonella typhimurium detection. Talanta 2018; 194:134-142. [PMID: 30609512 DOI: 10.1016/j.talanta.2018.10.024] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 10/04/2018] [Accepted: 10/08/2018] [Indexed: 12/31/2022]
Abstract
Polymeric ion selective electrodes are highly sensitive to changes in zero current ion flow and this offers a route to signal amplification in label-free potentiometric immunosensors. In this work, a label-free potentiometric immunosensor toward Salmonella typhimurium (ST) assembled in a home-made pipette-tip electrode is described. The signal-output amplification was implemented on a gold nanoparticle polymer inclusion membrane (AuNPs-PIM) which was used as sensing platform and for antibody immobilization. Additionally, a marker ion was used to detect the antibody-antigen binding event at the electrode surface. The immunosensor construction was performed in several steps: i) gold salt ions extraction in PVC membrane; ii) AuNPs formation using Na2EDTA as reduction agent; iii) antibody anti-Salmonella conjugation on AuNPs-PIM in pipette-tip electrodes. The potential shift observed in potentiometric measurements was derived simply from the blocking effect in the ionic flux caused by antigen-antibody conjugation, without no extra steps, mimetizing the ion-channel sensors. A detection limit of 6 cells mL-1 was attained. As proof-of-concept, recovery studies were performed in spiked commercial apple juice samples with success. Due to the simplicity of use, the appealing cost of equipment and sensor production and being able to provide a quick analytical response (less than 1 h for a complete assay, including sample preparation for analysis), this scheme represents a good prototype device for the detection of foodborne pathogens like ST or other immune-responsive bacteria.
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Affiliation(s)
- Nádia F D Silva
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, 4200-072 Porto, Portugal; REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Júlia M C S Magalhães
- REQUIMTE/LAQV, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, 4200-465 Porto, Portugal.
| | - M Fátima Barroso
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, 4200-072 Porto, Portugal
| | - Teresa Oliva-Teles
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, 4200-072 Porto, Portugal
| | - Cristina Freire
- REQUIMTE/LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | - Cristina Delerue-Matos
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, 4200-072 Porto, Portugal
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Yue H, Sun H, Peng T, Liu B, Xie Y. Evolution of structure and functional groups in the functionalization of graphene oxide with L-cysteine. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.111] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Silva AL, Corrêa MM, de Oliveira GC, Michel RC, Semaan FS, Ponzio EA. Development and application of a routine robust graphite/poly(lactic acid) composite electrode for the fast simultaneous determination of Pb2+ and Cd2+ in jewelry by square wave anodic stripping voltammetry. NEW J CHEM 2018. [DOI: 10.1039/c8nj03501f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A handcrafted, low cost sustainable electrochemical sensor based on graphite/PLA was developed and applied for the simultaneous quantification of Pb2+ and Cd2+ in jewelry.
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Affiliation(s)
- Ana Luísa Silva
- Grupo de Eletroquímica e Eletroanalítica (G2E) – Instituto de Química da Universidade Federal Fluminense
- Niterói
- Brazil
| | - Matheus Millen Corrêa
- Grupo de Eletroquímica e Eletroanalítica (G2E) – Instituto de Química da Universidade Federal Fluminense
- Niterói
- Brazil
| | - Grasielli Correa de Oliveira
- Grupo de Eletroquímica e Eletroanalítica (G2E) – Instituto de Química da Universidade Federal Fluminense
- Niterói
- Brazil
| | - Ricardo Cunha Michel
- Laboratório de Integração em Tecnologia Analítica (LabITAn) – Departamento de Química Analítica do Instituto de Química da Universidade Federal do Rio de Janeiro
- Cidade Universitária – Rio de Janeiro
- Brazil
| | - Felipe Silva Semaan
- Grupo de Eletroquímica e Eletroanalítica (G2E) – Instituto de Química da Universidade Federal Fluminense
- Niterói
- Brazil
| | - Eduardo Ariel Ponzio
- Grupo de Eletroquímica e Eletroanalítica (G2E) – Instituto de Química da Universidade Federal Fluminense
- Niterói
- Brazil
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