1
|
Brunet Cabré M, Okumu F, McKelvey K. Electrochemical Detection of Tenofovir through Quenching of Chloride Ion-Mediated Gold Electrodissolution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4314-4320. [PMID: 38353065 DOI: 10.1021/acs.langmuir.3c03563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Tenofovir (TNF) is a nucleotide reverse transcriptase inhibitor used as an antiviral medication to treat human immunodeficiency virus (HIV) and hepatitis B virus infections. The extensive use of TNF can result in its release into the environment, and there is growing interest in developing simple and cost-effective methods for detecting TNF. We report that the electrochemical dissolution of gold in a chloride ion-containing electrolyte is suppressed in the presence of TNF. The quenching of the gold electrodissolution response is the result of the adsorption of TNF onto the gold surface. A simple analysis shows that we can relate the degree of TNF surface coverage to the relative size of the quenching of the gold electrodissolution response and follow the time-dependent absorption of TNF onto the gold electrode surface.
Collapse
Affiliation(s)
- Marc Brunet Cabré
- School of Chemistry, Trinity College Dublin, Dublin D02 PN4, Ireland
| | - Fredrick Okumu
- Jaramogi Oginga Odinga University of Science and Technology, P.O. Box 201, Bondo 40601, Kenya
| | - Kim McKelvey
- School of Chemical and Physical Sciences and MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, P.O. Box 600, Wellington 6012, New Zealand
| |
Collapse
|
2
|
Ferreira LMC, Reis IF, Martins PR, Marcolino-Junior LH, Bergamini MF, Camargo JR, Janegitz BC, Vicentini FC. Using low-cost disposable immunosensor based on flexible PET screen-printed electrode modified with carbon black and gold nanoparticles for sensitive detection of SARS-CoV-2. TALANTA OPEN 2023; 7:100201. [PMID: 36959870 PMCID: PMC9998283 DOI: 10.1016/j.talo.2023.100201] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 03/02/2023] [Accepted: 03/05/2023] [Indexed: 03/12/2023] Open
Abstract
To help meet the global demand for reliable and inexpensive COVID-19 testing and environmental analysis of SARS-CoV-2, the present work reports the development and application of a highly efficient disposable electrochemical immunosensor for the detection of SARS-CoV-2 in clinical and environmental matrices. The sensor developed is composed of a screen-printed electrode (SPE) array which was constructed using conductive carbon ink printed on polyethylene terephthalate (PET) substrate made from disposable soft drink bottles. The recognition site (Spike S1 Antibody (anti-SP Ab)) was covalently immobilized on the working electrode surface, which was effectively modified with carbon black (CB) and gold nanoparticles (AuNPs). The immunosensing material was subjected to a multi-technique characterization analysis using X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) with elemental analysis via energy dispersive spectroscopy (EDS). The electrochemical characterization of the electrode surface and analytical measurements were performed using cyclic voltammetry (CV) and square-wave voltammetry (SWV). The immunosensor was easily applied for the conduct of rapid diagnoses or accurate quantitative environmental analyses by setting the incubation period to 10 min or 120 min. Under optimized conditions, the biosensor presented limits of detection (LODs) of 101 fg mL-1 and 46.2 fg mL-1 for 10 min and 120 min incubation periods, respectively; in addition, the sensor was successfully applied for SARS-CoV-2 detection and quantification in clinical and environmental samples. Considering the costs of all the raw materials required for manufacturing 200 units of the AuNP-CB/PET-SPE immunosensor, the production cost per unit is 0.29 USD.
Collapse
Affiliation(s)
- Luís M C Ferreira
- Center of Nature Sciences, Federal University of São Carlos, Rod. Lauri Simões de Barros km 12, 18290-000, Buri, SP, Brazil
| | - Isabela F Reis
- Center of Nature Sciences, Federal University of São Carlos, Rod. Lauri Simões de Barros km 12, 18290-000, Buri, SP, Brazil
| | - Paulo R Martins
- Institute of Chemistry, Federal University of Goiás, Av. Esperança, Goiania, GO 74690-900, Brazil
| | - Luiz H Marcolino-Junior
- Laboratory of Electrochemical Sensors (LabSensE) - Department of Chemistry, Federal University of Paraná, 81.531-980, Curitiba, PR, Brazil
| | - Marcio F Bergamini
- Laboratory of Electrochemical Sensors (LabSensE) - Department of Chemistry, Federal University of Paraná, 81.531-980, Curitiba, PR, Brazil
| | - Jessica R Camargo
- Department of Nature Sciences, Mathematics and Education, Federal University of São Carlos, 13600-970, Araras, SP, Brazil
| | - Bruno C Janegitz
- Department of Nature Sciences, Mathematics and Education, Federal University of São Carlos, 13600-970, Araras, SP, Brazil
| | - Fernando C Vicentini
- Center of Nature Sciences, Federal University of São Carlos, Rod. Lauri Simões de Barros km 12, 18290-000, Buri, SP, Brazil
| |
Collapse
|
3
|
Wittstock G, Bäumer M, Dononelli W, Klüner T, Lührs L, Mahr C, Moskaleva LV, Oezaslan M, Risse T, Rosenauer A, Staubitz A, Weissmüller J, Wittstock A. Nanoporous Gold: From Structure Evolution to Functional Properties in Catalysis and Electrochemistry. Chem Rev 2023; 123:6716-6792. [PMID: 37133401 PMCID: PMC10214458 DOI: 10.1021/acs.chemrev.2c00751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Indexed: 05/04/2023]
Abstract
Nanoporous gold (NPG) is characterized by a bicontinuous network of nanometer-sized metallic struts and interconnected pores formed spontaneously by oxidative dissolution of the less noble element from gold alloys. The resulting material exhibits decent catalytic activity for low-temperature, aerobic total as well as partial oxidation reactions, the oxidative coupling of methanol to methyl formate being the prototypical example. This review not only provides a critical discussion of ways to tune the morphology and composition of this material and its implication for catalysis and electrocatalysis, but will also exemplarily review the current mechanistic understanding of the partial oxidation of methanol using information from quantum chemical studies, model studies on single-crystal surfaces, gas phase catalysis, aerobic liquid phase oxidation, and electrocatalysis. In this respect, a particular focus will be on mechanistic aspects not well understood, yet. Apart from the mechanistic aspects of catalysis, best practice examples with respect to material preparation and characterization will be discussed. These can improve the reproducibility of the materials property such as the catalytic activity and selectivity as well as the scope of reactions being identified as the main challenges for a broader application of NPG in target-oriented organic synthesis.
Collapse
Affiliation(s)
- Gunther Wittstock
- Carl
von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, D-26111 Oldenburg, Germany
| | - Marcus Bäumer
- University
of Bremen, Institute for Applied
and Physical Chemistry, 28359 Bremen, Germany
- University
of Bremen, MAPEX Center for
Materials and Processes, 28359 Bremen, Germany
| | - Wilke Dononelli
- University
of Bremen, MAPEX Center for
Materials and Processes, 28359 Bremen, Germany
- University
of Bremen, Bremen Center for
Computational Materials Science, Hybrid Materials Interfaces Group, Am Fallturm 1, Bremen 28359, Germany
| | - Thorsten Klüner
- Carl
von Ossietzky University of Oldenburg, School of Mathematics and Science, Institute of Chemistry, D-26111 Oldenburg, Germany
| | - Lukas Lührs
- Hamburg
University of Technology, Institute of Materials
Physics and Technology, 21703 Hamburg, Germany
| | - Christoph Mahr
- University
of Bremen, MAPEX Center for
Materials and Processes, 28359 Bremen, Germany
- University
of Bremen, Institute of Solid
State Physics, Otto Hahn
Allee 1, 28359 Bremen, Germany
| | - Lyudmila V. Moskaleva
- University
of the Free State, Department of Chemistry, P.O. Box 339, Bloemfontein 9300, South Africa
| | - Mehtap Oezaslan
- Technical
University of Braunschweig Institute of Technical Chemistry, Technical Electrocatalysis Laboratory, Franz-Liszt-Strasse 35a, 38106 Braunschweig, Germany
| | - Thomas Risse
- Freie
Universität Berlin, Institute of Chemistry
and Biochemistry, Arnimallee
22, 14195 Berlin, Germany
| | - Andreas Rosenauer
- University
of Bremen, MAPEX Center for
Materials and Processes, 28359 Bremen, Germany
- University
of Bremen, Institute of Solid
State Physics, Otto Hahn
Allee 1, 28359 Bremen, Germany
| | - Anne Staubitz
- University
of Bremen, MAPEX Center for
Materials and Processes, 28359 Bremen, Germany
- University
of Bremen, Institute for Organic
and Analytical Chemistry, Leobener Strasse 7, D-28359 Bremen, Germany
| | - Jörg Weissmüller
- Hamburg
University of Technology, Institute of Materials
Physics and Technology, 21703 Hamburg, Germany
- Helmholtz-Zentrum
Hereon, Institute of Materials Mechanics, 21502 Geesthacht, Germany
| | - Arne Wittstock
- University
of Bremen, MAPEX Center for
Materials and Processes, 28359 Bremen, Germany
- University
of Bremen, Institute for Organic
and Analytical Chemistry, Leobener Strasse 7, D-28359 Bremen, Germany
| |
Collapse
|
4
|
Mie Y, Okabe H, Mikami C, Motomura T, Matsuda N. Nanostructured gold thin film electrode derived from surfactant-free gold nanoparticles for enhanced electrocatalysis. Electrochem commun 2023. [DOI: 10.1016/j.elecom.2022.107415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
|
5
|
Arjona N, Torres‒Pacheco LJ, Álvarez‒Contreras L, Guerra‒Balcázar M. Gold structures on 3D carbon electrodes as highly active nanomaterials for the clean energy conversion of crude glycerol. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
6
|
Martins TS, Bott-Neto JL, Machado SAS, Oliveira ON. Label-Free Electrochemical Immunosensor Made with Tree-like Gold Dendrites for Monitoring 25-Hydroxyvitamin D3 Metabolite. ACS APPLIED MATERIALS & INTERFACES 2022; 14:31455-31462. [PMID: 35776164 DOI: 10.1021/acsami.2c08381] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Flexible, fully printed immunosensors can meet the requirements of precision nutrition, but this demands optimized molecular architectures to reach the necessary sensitivity. Herein, we report on flexible and label-free immunosensor chips made with tree-like gold dendrites (AuDdrites) electrochemically formed by selective desorption of l-cysteine (L-cys) on (111) gold planes. Electrodeposition was used because it is scalable and cost-effective for a rapid, direct growth of Au hyperbranched dendritic structures. The 25-hydroxyvitamin D3 (25(OH)D3) metabolite was detected within 15 min with a limit of detection (LOD) of 0.03 ng mL-1. This high performance was possible due to the careful optimization of the electroactive layer and working conditions for square wave voltammetry (SWV). Electrocrystallization was manipulated by controlling the deposition potential and the molar ratio between HAuCl4 and L-cys. Metabolite detection was performed on human serum and saliva samples with adequate recovery between 97% and 100%. The immunosensors were stable and reproducible, unresponsive to interference from other molecules in human serum and saliva. They can be extended for use as wearable sensors with their mechanical flexibility and possible customization.
Collapse
Affiliation(s)
- Thiago S Martins
- São Carlos Institute of Chemistry, University of São Paulo, 13560-970 São Carlos, SP, Brazil
| | - José L Bott-Neto
- São Carlos Institute of Physics, University of São Paulo, 13560-970 São Carlos, SP, Brazil
| | - Sergio A S Machado
- São Carlos Institute of Chemistry, University of São Paulo, 13560-970 São Carlos, SP, Brazil
| | - Osvaldo N Oliveira
- São Carlos Institute of Physics, University of São Paulo, 13560-970 São Carlos, SP, Brazil
| |
Collapse
|
7
|
Sabaté Del Río J, Woo HK, Park J, Ha HK, Kim JR, Cho YK. SEEDING to Enable Sensitive Electrochemical Detection of Biomarkers in Undiluted Biological Samples. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2200981. [PMID: 35429065 DOI: 10.1002/adma.202200981] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Electrochemical biosensors have shown great potential for simple, fast, and cost-effective point-of-care diagnostic tools. However, direct analysis of complex biological fluids such as plasma has been limited by the loss of sensitivity caused by biofouling. By increasing the surface area, the nanostructured electrode can improve detection sensitivity. However, like a double-edged sword, a large surface area increases the nonspecific adsorption of contaminating proteins. The use of nanoporous structures may prevent fouling proteins. However, there is no straightforward approach for creating nanostructured and nanoporous surfaces compatible with microfabricated thin-film electrodes. Herein, the preferential etching of chloride and surfactant-assisted anisotropic gold reduction to create homogeneous, nanostructured, and nanoporous gold electrodes is demonstrated, yielding a 190 ± 20 times larger surface area within a minute without using templates. This process, "surfactant-based electrochemical etch-deposit interplay for nanostructure/nanopore growth" (SEEDING), on electrodes enhances the sensitivity and antibiofouling capabilities of amperometric biosensors, enabling direct analysis of tumor-derived extracellular vesicles (tEVs) in complex biofluids with a limit of detection of 300 tEVs µL-1 from undiluted plasma and good discrimination between patients with prostate cancer from healthy ones with an area under the curve of 0.91 in urine and 0.90 in plasma samples.
Collapse
Affiliation(s)
- Jonathan Sabaté Del Río
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
| | - Hyun-Kyung Woo
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Juhee Park
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
| | - Hong Koo Ha
- Department of Urology, Pusan National University Hospital, College of Medicine, Pusan National University, Busan, 49241, Republic of Korea
| | - Jae-Ryong Kim
- Department of Biochemistry and Molecular Biology, Smart-aging Convergence Research Center, College of Medicine, Yeungnam University, Daegu, 42415, Republic of Korea
| | - Yoon-Kyoung Cho
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| |
Collapse
|
8
|
Domínguez-Bajo A, Rosa JM, González-Mayorga A, Rodilla BL, Arché-Núñez A, Benayas E, Ocón P, Pérez L, Camarero J, Miranda R, González MT, Aguilar J, López-Dolado E, Serrano MC. Nanostructured gold electrodes promote neural maturation and network connectivity. Biomaterials 2021; 279:121186. [PMID: 34700221 DOI: 10.1016/j.biomaterials.2021.121186] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 10/05/2021] [Accepted: 10/12/2021] [Indexed: 12/22/2022]
Abstract
Progress in the clinical application of recording and stimulation devices for neural diseases is still limited, mainly because of suboptimal material engineering and unfavorable interactions with biological entities. Nanotechnology is providing upgraded designs of materials to better mimic the native extracellular environment and attain more intimate contacts with individual neurons, besides allowing for the miniaturization of the electrodes. However, little progress has been done to date on the understanding of the biological impact that such neural interfaces have on neural network maturation and functionality. In this work, we elucidate the effect of a gold (Au) highly ordered nanostructure on the morphological and functional interactions with neural cells and tissues. Alumina-templated Au nanostructured electrodes composed of parallel nanowires of 160 nm in diameter and 1.2 μm in length (Au-NWs), with 320 nm of pitch, are designed and characterized. Equivalent non-structured Au electrodes (Au-Flat) are used for comparison. By using diverse techniques in in vitro cell cultures including live calcium imaging, we found that Au-NWs interfaced with primary neural cortical cells for up to 14 days allow neural networks growth and increase spontaneous activity and ability of neuronal synchronization, thus indicating that nanostructured features favor neuronal network. The enhancement in the number of glial cells found is hypothesized to be behind these beneficial functional effects. The in vivo effect of the implantation of these nanostructured electrodes and its potential relevance for future clinical applicability has been explored in an experimental model of rat spinal cord injury. Subacute responses to implanted Au-NWs show no overt reactive or toxic biological reactions besides those triggered by the injury itself. These results highlight the translational potential of Au-NWs electrodes for in vivo applications as neural interfaces in contact with central nervous tissues including the injured spinal cord.
Collapse
Affiliation(s)
- Ana Domínguez-Bajo
- Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Calle Sor Juana Inés de la Cruz 3, 28049, Madrid, Spain
| | - Juliana M Rosa
- Hospital Nacional de Parapléjicos, SESCAM, Finca La Peraleda s/n, 45071, Toledo, Spain
| | | | - Beatriz L Rodilla
- Instituto Madrileño de Estudios Avanzados (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain; Departamento de Física de Materiales, Universidad Complutense de Madrid, Plaza de las Ciencias s/n, 28040, Madrid, Spain
| | - Ana Arché-Núñez
- Instituto Madrileño de Estudios Avanzados (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain
| | - Esther Benayas
- Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Calle Sor Juana Inés de la Cruz 3, 28049, Madrid, Spain
| | - Pilar Ocón
- Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Lucas Pérez
- Instituto Madrileño de Estudios Avanzados (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain; Departamento de Física de Materiales, Universidad Complutense de Madrid, Plaza de las Ciencias s/n, 28040, Madrid, Spain
| | - Julio Camarero
- Instituto Madrileño de Estudios Avanzados (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain; Instituto "Nicolás Cabrera" and Condensed Matter Physics Center (IFIMAC), Departamento de Física de la Materia Condensada, Universidad Autonoma de Madrid, Madrid, 28049, Spain
| | - Rodolfo Miranda
- Instituto Madrileño de Estudios Avanzados (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain; Instituto "Nicolás Cabrera" and Condensed Matter Physics Center (IFIMAC), Departamento de Física de la Materia Condensada, Universidad Autonoma de Madrid, Madrid, 28049, Spain
| | - M Teresa González
- Instituto Madrileño de Estudios Avanzados (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain
| | - Juan Aguilar
- Hospital Nacional de Parapléjicos, SESCAM, Finca La Peraleda s/n, 45071, Toledo, Spain; Research Unit of "Design and development of biomaterials for neural regeneration", Hospital Nacional de Parapléjicos, Joint Research Unit with CSIC, Finca La Peraleda s/n, 45071, Toledo, Spain
| | - Elisa López-Dolado
- Hospital Nacional de Parapléjicos, SESCAM, Finca La Peraleda s/n, 45071, Toledo, Spain; Research Unit of "Design and development of biomaterials for neural regeneration", Hospital Nacional de Parapléjicos, Joint Research Unit with CSIC, Finca La Peraleda s/n, 45071, Toledo, Spain
| | - María C Serrano
- Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Calle Sor Juana Inés de la Cruz 3, 28049, Madrid, Spain.
| |
Collapse
|
9
|
Ding X, Garlyyev B, Watzele SA, Kobina Sarpey T, Bandarenka AS. Spotlight on the Effect of Electrolyte Composition on the Potential of Maximum Entropy: Supporting Electrolytes Are Not Always Inert. Chemistry 2021; 27:10016-10020. [PMID: 34050569 PMCID: PMC8361723 DOI: 10.1002/chem.202101537] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Indexed: 12/02/2022]
Abstract
The influence of electrolyte pH, the presence of alkali metal cations (Na+ , K+ ), and the presence of O2 on the interfacial water structure of polycrystalline gold electrodes has been experimentally studied in detail. The potential of maximum entropy (PME) was determined by the laser-induced current transient (LICT) technique. Our results demonstrate that increasing the electrolyte pH and introducing O2 shift the PME to more positive potentials. Interestingly, the PME exhibits a higher sensitivity to the pH change in the presence of K+ than Na+ . Altering the pH of the K2 SO4 solution from 4 to 6 can cause a drastic shift in the PME. These findings reveal that, for example, K2 SO4 and Na2 SO4 cannot be considered as equal supporting electrolytes: it is not a viable assumption. This can likely be extrapolated to other common "inert" supporting electrolytes. Beyond this, knowledge about the near-ideal electrolyte composition can be used to optimize electrochemical devices such as electrolyzers, fuel cells, batteries, and supercapacitors.
Collapse
Affiliation(s)
- Xing Ding
- Physics of Energy Conversion and StorageTechnical University of MunichJames-Franck-Strasse 185748GarchingGermany
| | - Batyr Garlyyev
- Physics of Energy Conversion and StorageTechnical University of MunichJames-Franck-Strasse 185748GarchingGermany
| | - Sebastian A. Watzele
- Physics of Energy Conversion and StorageTechnical University of MunichJames-Franck-Strasse 185748GarchingGermany
| | - Theophilus Kobina Sarpey
- Physics of Energy Conversion and StorageTechnical University of MunichJames-Franck-Strasse 185748GarchingGermany
| | - Aliaksandr S. Bandarenka
- Physics of Energy Conversion and StorageTechnical University of MunichJames-Franck-Strasse 185748GarchingGermany
- Catalysis Research Center TUMTechnical University of MunichErnst-Otto-Fischer-Strasse 185748GarchingGermany
| |
Collapse
|
10
|
Qian L, Elmahdy R, Raj Thiruppathi A, Chen A. An ultrasensitive electrochemical sensor for the detection of acetaminophen via a three-dimensional hierarchical nanoporous gold wire electrode. Analyst 2021; 146:4525-4534. [PMID: 34137402 DOI: 10.1039/d1an00755f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Acetaminophen is one of the most commonly used non-steroidal anti-inflammatory drugs worldwide. However, due to the increasing popularity of this drug, overdosing and the contamination of ambient waterways have emerged as major issues. Here, we report on a reliable, ultrasensitive, and easy-to-use sensor for the electrochemical detection of acetaminophen. This sensor employs a gold wire electrode with a unique three-dimensional hierachical nanoporous structure, fabricated using a dissolution, disproportion and deposition procedure. In consideration of optimal sensitivity and reproducibility, the most suitable nanoporous gold electrode was employed for the detection of acetamiophen among a set of nanoporous electrodes made under different reaction times. It was found that the pore size, film thickness, and electrochemically active surface area (ECSA) played major roles in the fouling resistance of the developed sensor. The ECSA of the selected sensor was increased by 15.8 times after the post-treatment. The 3D nanoporous electrode demonstrated excellent performance for the detection of acetaminophen with a low detection limit of 3.37 nM, and a strong anti-interference capability. The developed nanoporous Au electrode proved effective for the detection of acetaminophen in real sheep serum, which confirmed its promising application for medical diagnostics and pollutant surveilliance in source waters.
Collapse
Affiliation(s)
- Lanting Qian
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2 W1, Canada.
| | - Reem Elmahdy
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2 W1, Canada.
| | - Antony Raj Thiruppathi
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2 W1, Canada.
| | - Aicheng Chen
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Rd E, Guelph, Ontario N1G 2 W1, Canada.
| |
Collapse
|
11
|
Kumar A, Gonçalves JM, Furtado VL, Araki K, Angnes L, Bouvet M, Bertotti M, Meunier‐Prest R. Mass Transport in Nanoporous Gold and Correlation with Surface Pores for EC
1
Mechanism: Case of Ascorbic Acid. ChemElectroChem 2021. [DOI: 10.1002/celc.202100440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Abhishek Kumar
- Institut de Chimie Moléculaire de l'Université de Bourgogne UMR CNRS 6302 Université Bourgogne Franche-Comté 9 Avenue Alain Savary Dijon Cedex 21078 France
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 05508-000 São Paulo, SP Brazil
| | - Josue M. Gonçalves
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 05508-000 São Paulo, SP Brazil
| | - Vinicius L. Furtado
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 05508-000 São Paulo, SP Brazil
| | - Koiti Araki
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 05508-000 São Paulo, SP Brazil
| | - Lucio Angnes
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 05508-000 São Paulo, SP Brazil
| | - Marcel Bouvet
- Institut de Chimie Moléculaire de l'Université de Bourgogne UMR CNRS 6302 Université Bourgogne Franche-Comté 9 Avenue Alain Savary Dijon Cedex 21078 France
| | - Mauro Bertotti
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 05508-000 São Paulo, SP Brazil
| | - Rita Meunier‐Prest
- Institut de Chimie Moléculaire de l'Université de Bourgogne UMR CNRS 6302 Université Bourgogne Franche-Comté 9 Avenue Alain Savary Dijon Cedex 21078 France
| |
Collapse
|
12
|
Chinnaiah J, Kasian O, Dekshinamoorthy A, Vijayaraghavan S, Mayrhofer KJJ, Cherevko S, Scholz F. Tuning the Anodic and Cathodic Dissolution of Gold by Varying the Surface Roughness. ChemElectroChem 2021. [DOI: 10.1002/celc.202100366] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jeyabharathi Chinnaiah
- Electroplating & Metal Finishing Division CSIR-Central Electrochemical Research Institute Karaikudi 630 003 Tamil Nadu India
- Institute of Biochemistry University of Greifswald Felix-Hausdorff-Strasse 4 17487 Greifswald Germany
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Olga Kasian
- Department of Interface Chemistry and Surface Engineering Max-Planck-Institute of Iron Research Max-Planck-Strasse 1 40237 Düsseldorf Germany
| | - Amuthan Dekshinamoorthy
- Corrosion and Materials Protection Division, CSIR-Central Electrochemical Research Institute Karaikudi 630 003 Tamil Nadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Saranyan Vijayaraghavan
- Corrosion and Materials Protection Division, CSIR-Central Electrochemical Research Institute Karaikudi 630 003 Tamil Nadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Karl J. J. Mayrhofer
- Department of Interface Chemistry and Surface Engineering Max-Planck-Institute of Iron Research Max-Planck-Strasse 1 40237 Düsseldorf Germany
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11) Forschungszentrum Jülich Egerlandstrasse 3 91058 Erlangen Germany
- Department of Chemical and Biological Engineering, Friedrich-Alexander- Universität Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen Germany
| | - Serhiy Cherevko
- Department of Interface Chemistry and Surface Engineering Max-Planck-Institute of Iron Research Max-Planck-Strasse 1 40237 Düsseldorf Germany
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11) Forschungszentrum Jülich Egerlandstrasse 3 91058 Erlangen Germany
| | - Fritz Scholz
- Institute of Biochemistry University of Greifswald Felix-Hausdorff-Strasse 4 17487 Greifswald Germany
| |
Collapse
|
13
|
Gonzalez‐Martinez E, Saem S(K, Beganovic NE, Moran‐Mirabal J. Fabrication of microstructured electrodes via electroless metal deposition onto polydopamine‐coated polystyrene substrates and thermal shrinking. NANO SELECT 2021. [DOI: 10.1002/nano.202100022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Affiliation(s)
| | | | - Nadine E. Beganovic
- Department of Chemistry and Chemical Biology McMaster University Hamilton Canada
| | - Jose Moran‐Mirabal
- Department of Chemistry and Chemical Biology McMaster University Hamilton Canada
| |
Collapse
|
14
|
Ameku W, Gonçalves JM, Ataide VN, Ferreira Santos MS, Gutz IGR, Araki K, Paixão TRLC. Combined Colorimetric and Electrochemical Measurement Paper-Based Device for Chemometric Proof-of-Concept Analysis of Cocaine Samples. ACS OMEGA 2021; 6:594-605. [PMID: 33458511 PMCID: PMC7807801 DOI: 10.1021/acsomega.0c05077] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 12/22/2020] [Indexed: 05/26/2023]
Abstract
Cocaine (COC) is one of the most widely consumed illegal drugs around the world. Street COC is commonly adulterated with pharmaceutical compounds that mimic or intensify the COC's sensory effect. Adulteration is performed to increase the profit of criminal organizations and each one has their own way of doing it. Therefore, determining the composition of seized COC samples (chemical profile) provides evidence for the police to track criminal organization networks and their activity patterns. Using filter paper as a substrate, we developed a multiple detection paper-based analytical device (PAD) that combines colorimetric and electrochemical measurements to discriminate COC samples according to adulterant's content. A regular graphite lead modified with a gold film made from Au leaf (graphite/Au) to improve electron transfer was used as a working electrode. Silver and Ag/AgCl were used as auxiliary and reference electrodes, respectively. The colorimetric device was patterned using a laser cutter and coupled to the electrochemical device using a double-sided tape, allowing simultaneous analysis to gather more analytical information about COC samples. Graphite/Au was characterized by scanning and transmission electron microscopies and electrochemical assays. The simultaneous colorimetric and electrochemical analyses combined to principal component analysis improved the analytical characterization of COC trial samples and provided a fast discrimination based on the assembled database.
Collapse
Affiliation(s)
- Wilson
A. Ameku
- Departamento
de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, São Paulo 05508-000, Brazil
| | - Josué M. Gonçalves
- Departamento
de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, São Paulo 05508-000, Brazil
| | - Vanessa N. Ataide
- Departamento
de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, São Paulo 05508-000, Brazil
| | - Mauro S. Ferreira Santos
- Departamento
de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, São Paulo 05508-000, Brazil
| | - Ivano G. R. Gutz
- Departamento
de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, São Paulo 05508-000, Brazil
| | - Koiti Araki
- Departamento
de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, São Paulo 05508-000, Brazil
| | - Thiago R. L. C. Paixão
- Departamento
de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, São Paulo 05508-000, Brazil
- Instituto
Nacional de Ciência e Tecnologia de Bioanalítica, Campinas, São Paulo 13084-971, Brazil
| |
Collapse
|
15
|
From Chip Size to Wafer-Scale Nanoporous Gold Reliable Fabrication Using Low Currents Electrochemical Etching. NANOMATERIALS 2020; 10:nano10112321. [PMID: 33238541 PMCID: PMC7700230 DOI: 10.3390/nano10112321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/14/2020] [Accepted: 11/16/2020] [Indexed: 11/21/2022]
Abstract
We report a simple, scalable route to wafer-size processing for fabrication of tunable nanoporous gold (NPG) by the anodization process at low constant current in a solution of hydrofluoric acid and dimethylformamide. Microstructural, optical, and electrochemical investigations were employed for a systematic analysis of the sample porosity evolution while increasing the anodization duration, namely the small angle X-ray scattering (SAXS) technique and electrochemical impedance spectroscopy (EIS). Whereas the SAXS analysis practically completes the scanning electronic microscopy (SEM) investigations and provides data about the impact of the etching time on the nanoporous gold layers in terms of fractal dimension and average pore surface area, the EIS analysis was used to estimate the electroactive area, the associated roughness factor, as well as the heterogeneous electron transfer rate constant. The bridge between the analyses is made by the scanning electrochemical microscopy (SECM) survey, which practically correlates the surface morphology with the electrochemical activity. The results were correlated to endorse the control over the gold film nanostructuration process deposited directly on the substrate that can be further subjected to different technological processes, retaining its properties. The results show that the anodization duration influences the surface area, which subsequently modifies the properties of NPG, thus enabling tuning the samples for specific applications, either optical or chemical.
Collapse
|
16
|
Mie Y, Katagai S, Ikegami M. Electrochemical Oxidation of Monosaccharides at Nanoporous Gold with Controlled Atomic Surface Orientation and Non-Enzymatic Galactose Sensing. SENSORS (BASEL, SWITZERLAND) 2020; 20:E5632. [PMID: 33019754 PMCID: PMC7582603 DOI: 10.3390/s20195632] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/21/2020] [Accepted: 09/29/2020] [Indexed: 12/16/2022]
Abstract
Non-enzymatic saccharide sensors are of great interest in diagnostics, but their non-selectivity limits their practical diagnostic abilities. In this study, we investigated the electrochemical oxidation of monosaccharides at nanoporous gold (NPG) catalysts with different contributions of surface crystallographic orientations. Fructose elicited no clear electrochemical response, but glucose, galactose, and mannose produced clear oxidative current. The onset potentials for oxidation of these saccharides depended on the surface atomic structure of the NPG. The oxidation potential was approximately 100 mV less positive at the Au(100)-enhanced NPG than at the Au(111)-enhanced NPG. Furthermore, the voltammetric responses significantly differed among the saccharides. Galactose was oxidized at less positive potential and exhibited a higher current response than the other saccharides. This tendency was enhanced in the presence of chloride ions. These features enabled the selective and sensitive detection of galactose at an NPG electrode without enzymes under physiological conditions. A linear range of 10 μM to 1.8 mM was obtained in the calibration plot, which was comparable to those in previously reported enzymatic galactose sensors. Thus, we demonstrated that controlling the crystallographic orientation on the nanostructured electrode surface is useful in developing electrochemical sensors.
Collapse
Affiliation(s)
- Yasuhiro Mie
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo 062-8517, Japan; (S.K.); (M.I.)
| | | | | |
Collapse
|
17
|
Mie Y, Takayama H, Hirano Y. Facile control of surface crystallographic orientation of anodized nanoporous gold catalyst and its application for highly efficient hydrogen evolution reaction. J Catal 2020. [DOI: 10.1016/j.jcat.2020.06.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
18
|
Doménech-Carbó A, Scholz F, Brauns M, Tiley-Nel S, Oliver A, Aguilella G, Montoya N, Doménech-Carbó MT. Electrochemical dating of archaeological gold based on refined peak current determinations and Tafel analysis. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135759] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
19
|
Ahrens P, Zander M, Hirsch D, Hasse U, Wulff H, Frost F, Scholz F. Influence of argon ion beam etching and thermal treatment on polycrystalline and single crystal gold electrodes Au(100) and Au(111). J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.10.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
20
|
Bifunctional Tailoring of Platinum Surfaces with Earth Abundant Iron Oxide Nanowires for Boosted Formic Acid Electro-Oxidation. JOURNAL OF NANOTECHNOLOGY 2018. [DOI: 10.1155/2018/4657040] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
To expedite the marketing of direct formic acid fuel cells, a peerless inexpensive binary FeOx/Pt nanocatalyst was proposed for formic acid electro-oxidation (FAO). The roles of both catalytic ingredients (FeOx and Pt) were inspired by testing the catalytic performance of FAO at the FeOx/Au and FeOx/GC analogies. The deposition of FeOx proceeded electrochemically with a post‐activating step that identified the catalyst’s structure and performance. With a proper adaptation for the deposition and activation processes, the FeOx/Pt nanocatalyst succeeded to mitigate the typical CO poisoning that represents the principal element deteriorating the catalytic performance of the direct formic acid fuel cells. It also provided a higher (eightfold) catalytic efficiency than the bare Pt substrates toward FAO with a much better durability. Field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) were all employed to inspect, respectively, the surface morphology, bulk composition, and crystal structure of the catalyst. The electrochemical impedance spectra could correlate the charge transfer resistances for FAO over the inspected set of catalysts to explore the role of FeOx in mediating the reaction mechanism.
Collapse
|
21
|
Hersbach TJP, McCrum IT, Anastasiadou D, Wever R, Calle-Vallejo F, Koper MTM. Alkali Metal Cation Effects in Structuring Pt, Rh, and Au Surfaces through Cathodic Corrosion. ACS APPLIED MATERIALS & INTERFACES 2018; 10:39363-39379. [PMID: 30351902 DOI: 10.1021/acsami.8b13883] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cathodic corrosion is an electrochemical etching process that alters metallic surfaces by creating nanoparticles and a variety of etching features. Because these features typically have a preferential orientation, cathodic corrosion can be applied to modify and nanostructure electrode surfaces. However, this application of cathodic corrosion is currently limited by an insufficient chemical understanding of its underlying mechanism. This includes the role of alkali metal cations, which are thought to be crucial in both enabling cathodic corrosion and controlling its final facet preference. This work addresses this knowledge gap by exploring the cathodic corrosion of Pt, Rh, and Au in LiOH, NaOH, and KOH through both experimental and theoretical methods. These methods demonstrate that cations are adsorbed during cathodic corrosion and play a major role in controlling the onset potential and final surface morphology in cathodic corrosion. Interestingly, an equally significant role appears to be played by adsorbed hydrogen, based on calculations using literature density functional theory data. Considering the significance of both hydrogen and electrolyte cations, it is hypothesized that cathodic corrosion might proceed via an intermediate ternary metal hydride. This fundamental insight leads to both metal-specific recommendations and more general guidelines for applying cathodic corrosion to structure metallic surfaces.
Collapse
Affiliation(s)
- Thomas J P Hersbach
- Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA Leiden , The Netherlands
| | - Ian T McCrum
- Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA Leiden , The Netherlands
| | - Dimitra Anastasiadou
- Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA Leiden , The Netherlands
| | - Rianne Wever
- Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA Leiden , The Netherlands
| | - Federico Calle-Vallejo
- Departament de Ciència de Materials i Química Fisica & Institut de Química Teòrica i Computacional (IQTCUB) , Universitat de Barcelona , Martí i Franquès 1 , 08028 Barcelona , Spain
| | - Marc T M Koper
- Leiden Institute of Chemistry , Leiden University , P.O. Box 9502, 2300 RA Leiden , The Netherlands
| |
Collapse
|
22
|
Sáenz HSC, Hernández-Saravia LP, Selva JSG, Sukeri A, Espinoza-Montero PJ, Bertotti M. Electrochemical dopamine sensor using a nanoporous gold microelectrode: a proof-of-concept study for the detection of dopamine release by scanning electrochemical microscopy. Mikrochim Acta 2018; 185:367. [PMID: 29987397 DOI: 10.1007/s00604-018-2898-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 06/28/2018] [Indexed: 11/30/2022]
Abstract
Nanoporous gold (NPG) structures were prepared on the surface of a gold microelectrode (Au-μE) by an anodization-reduction method. Cyclic voltammetry and field emission scanning electron microscopy were used to study the electrochemical properties and the morphology of the nanostructured film. Voltammetry showed an improved sensitivity for dopamine (DA) oxidation at this microelectrode when compared to a bare gold microelectrode, with a peak near 0.2 V (vs. Ag/AgCl) at a scan rate of 0.1 V s-1. This is due to the increased surface area and roughness. Square wave voltammetry shows a response that is linear in the 0.1-10 μmol L-1 DA concentration range, with a 30 nmol L-1 detection limit and a sensitivity of 1.18 mA (μmol L-1)-1 cm-2. The sensor is not interfered by ascorbic acid. The reproducibility, repeatability, long-term stability and real sample analysis (spiked urine) were assessed, and acceptable performance was achieved. The "proof-of-concept" detection of dopamine release was demonstrated by using scanning electrochemical microscopy (SECM) with the aim of future applications for single cell analysis. Graphical abstract A reproducible electrochemical approach was proposed to fabricate an NPG-microelectrode for DA detection, with enhanced sensitivity and selectivity. Besides, a proof-of-concept detection of DA release was also demonstrated by using SECM.
Collapse
Affiliation(s)
- Henry Steven Catota Sáenz
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av Prof. Lineu Prestes, São Paulo, SP, 748, Brazil.,Facultad de Ingeniería Química y Agroindustria, Escuela Politécnica Nacional, Ladrón de Guevara E11-253, P.O. Box 17-01-2759, 170525, Quito, Ecuador
| | - Lucas Patricio Hernández-Saravia
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av Prof. Lineu Prestes, São Paulo, SP, 748, Brazil.,Department of Chemistry, Universidad de Tarapacá, General Velasquéz 1577, Arica, Arica y Parinacota, Chile
| | - Jéssica S G Selva
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av Prof. Lineu Prestes, São Paulo, SP, 748, Brazil
| | - Anandhakumar Sukeri
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av Prof. Lineu Prestes, São Paulo, SP, 748, Brazil
| | - Patricio Javier Espinoza-Montero
- Escuela de Ciencias Químicas, Pontificia Universidad Católica del Ecuador, Avenida 12 de Octubre y Roca, Apartado: 17-01-2184, Quito, Pichincha, Ecuador.
| | - Mauro Bertotti
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av Prof. Lineu Prestes, São Paulo, SP, 748, Brazil.
| |
Collapse
|
23
|
Electrochemical analysis of gold embroidery threads from archeological textiles. J Solid State Electrochem 2018. [DOI: 10.1007/s10008-018-3927-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
24
|
Jeyabharathi C, Zander M, Scholz F. Underpotential deposition of lead on quasi-spherical and faceted gold nanoparticles. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.10.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
25
|
Doménech-Carbó A, Scholz F, Schmitt RT, Usera J, Forner AMG, De la Fuente-Arévalo E, Chinnaya J, Piquero-Cilla J, Montoya N. Electrochemical characterization of natural gold samples using the voltammetry of immobilized particles. Electrochem commun 2017. [DOI: 10.1016/j.elecom.2017.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
|
26
|
Ahrens P, Zander M, Hasse U, Wulff H, Jeyabharathi C, Kruth A, Scholz F. Electrochemical Formation of Gold Nanoparticles on Polycrystalline Gold Electrodes during Prolonged Potential Cycling. ChemElectroChem 2017. [DOI: 10.1002/celc.201700745] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Paula Ahrens
- University of Greifswald; Institute of Biochemistry; Felix-Hausdorff-Straße 4 D-17487 Greifswald Germany
| | - Manfred Zander
- University of Greifswald; Institute of Geography and Geology; Friedrich-Ludwig-Jahn-Straße 6 D-17487 Greifswald Germany
| | - Ulrich Hasse
- University of Greifswald; Institute of Biochemistry; Felix-Hausdorff-Straße 4 D-17487 Greifswald Germany
| | - Harm Wulff
- University of Greifswald; Institute of Physics; Felix-Hausdorff-Straße 6 D-17487 Greifswald Germany
| | - Chinnaya Jeyabharathi
- University of Greifswald; Institute of Biochemistry; Felix-Hausdorff-Straße 4 D-17487 Greifswald Germany
| | - Angela Kruth
- INP Greifswald e. V.; Felix-Hausdorff-Straße 2 D-17489 Greifswald Germany
| | - Fritz Scholz
- University of Greifswald; Institute of Biochemistry; Felix-Hausdorff-Straße 4 D-17487 Greifswald Germany
| |
Collapse
|
27
|
Electrodeposited honeycomb-like dendritic porous gold surface: An efficient platform for enzyme-free hydrogen peroxide sensor at low overpotential. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.10.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
28
|
|
29
|
Madry B, Grzeszczuk M, Wandelt K, Nowicki M. Electrochemical polymerization of pyrrole on Au(111) in sulphuric acid and sodium hexafluoroaluminate solutions monitored by electrochemical scanning tunneling microscopy. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.01.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
30
|
Electrochemical analysis of gildings in Valencia altarpieces: a cross-age study since fifteenth until twentieth century. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-017-3512-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
31
|
Łuczak T. Highly selective voltammetric sensing of paracetamol on nanogold modified electrode in the presence of interfering compounds. NEW J CHEM 2017. [DOI: 10.1039/c7nj01191a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
32
|
New self-assembled layers composed with gold nanoparticles, cysteamine and dihydrolipoic acid deposited on bare gold template for highly sensitive and selective simultaneous sensing of dopamine in the presence of interfering ascorbic and uric acids. J Solid State Electrochem 2016. [DOI: 10.1007/s10008-016-3416-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|