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Szewczyk J, Aguilar-Ferrer D, Coy E. Polydopamine films: Electrochemical growth and sensing applications. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Pandey RR, Chusuei CC. Electrochemical Detection of Dopamine Using a Prussian Blue Carbon Nanotube Composite Decorated with Agglomerated ZnO Particles. ANAL LETT 2021. [DOI: 10.1080/00032719.2021.2010090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Raja Ram Pandey
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, TN, USA
| | - Charles C. Chusuei
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, TN, USA
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Boccorh DK, Macdonald PA, Boyle CW, Wain AJ, Berlouis LEA, Wark AW. A universal polymer shell-isolated nanoparticle (SHIN) design for single particle spectro-electrochemical SERS sensing using different core shapes. NANOSCALE ADVANCES 2021; 3:6415-6426. [PMID: 36133494 PMCID: PMC9416900 DOI: 10.1039/d1na00473e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 09/20/2021] [Indexed: 06/16/2023]
Abstract
Shell-isolated nanoparticles (SHINs) have attracted increasing interest for non-interfering plasmonic enhanced sensing in fields such as materials science, biosensing, and in various electrochemical systems. The metallic core of these nanoparticles is isolated from the surrounding environment preventing direct contact or chemical interaction with the metal surface, while still being close enough to enable localized surface plasmon enhancement of the Raman scattering signal from the analyte. This concept forms the basis of the shell isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) technique. To date, the vast majority of SHIN designs have focused on SiO2 shells around spherical nanoparticle cores and there has been very limited published research considering alternatives. In this article, we introduce a new polymer-based approach which provides excellent control over the layer thickness and can be applied to plasmonic metal nanoparticles of various shapes and sizes without compromising the overall nanoparticle morphology. The SHIN layers are shown to exhibit excellent passivation properties and robustness in the case of gold nanosphere (AuNP) and anisotropic gold nanostar (AuNS) core shapes. In addition, in situ SHINERS spectro-electrochemistry measurements performed on both SHIN and bare Au nanoparticles demonstrate the utility of the SHIN coatings. Correlated confocal Raman and SEM mapping was achieved to clearly establish single nanoparticle SERS sensitivity. Finally, confocal in situ SERS mapping enabled visualisation of the redox related molecular structure changes occurring on an electrode surface in the vicinity of individual SHIN-coated nanoparticles.
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Affiliation(s)
- Delali K Boccorh
- Centre for Molecular Nanometrology, Technology and Innovation Centre, Dept. of Pure & Applied Chemistry, University of Strathclyde 99 George St Glasgow G1 1RD UK +44 (0)141 548 3084
- National Physical Laboratory Hampton Road Teddington TW11 0LW UK
| | - Peter A Macdonald
- Centre for Molecular Nanometrology, Technology and Innovation Centre, Dept. of Pure & Applied Chemistry, University of Strathclyde 99 George St Glasgow G1 1RD UK +44 (0)141 548 3084
| | - Colm W Boyle
- Centre for Molecular Nanometrology, Technology and Innovation Centre, Dept. of Pure & Applied Chemistry, University of Strathclyde 99 George St Glasgow G1 1RD UK +44 (0)141 548 3084
| | - Andrew J Wain
- National Physical Laboratory Hampton Road Teddington TW11 0LW UK
| | - Leonard E A Berlouis
- Dept. of Pure & Applied Chemistry, University of Strathclyde 295 Cathedral St Glasgow G1 1XL UK
| | - Alastair W Wark
- Centre for Molecular Nanometrology, Technology and Innovation Centre, Dept. of Pure & Applied Chemistry, University of Strathclyde 99 George St Glasgow G1 1RD UK +44 (0)141 548 3084
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Physicochemical and Electrochemical Characterization of Electropolymerized Polydopamine Films: Influence of the Deposition Process. NANOMATERIALS 2021; 11:nano11081964. [PMID: 34443798 PMCID: PMC8400158 DOI: 10.3390/nano11081964] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 07/20/2021] [Accepted: 07/26/2021] [Indexed: 12/03/2022]
Abstract
Polydopamine (PDA) is a synthetic eumelanin polymer which is, to date, mostly obtained by dip coating processes. In this contribution, we evaluate the physical and electrochemical properties of electrochemically deposited PDA films obtained by cyclic voltammetry or pulsed deposition. The obtained PDA thin films are investigated with respect to their electrochemical properties, i.e., electron transfer (ET) kinetics and charge transfer resistance using scanning electrochemical microscopy and electrochemical impedance spectroscopy, and their nanomechanical properties, i.e., Young’s modulus and adhesion forces at varying experimental conditions, such as applied potential or pH value of the medium using atomic force microscopy. In particular, the ET behavior at different pH values has not to date been investigated in detail for electrodeposited PDA thin films, which is of particular interest for a multitude of applications. Adhesion forces strongly depend on applied potential and surrounding pH value. Moreover, force spectroscopic measurements reveal a significantly higher percentage of polymeric character compared to films obtained by dip coating. Additionally, distinct differences between the two depositions methods are observed, which indicate that the pulse deposition process leads to denser, more cross-linked films.
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Liu H, Qu X, Tan H, Song J, Lei M, Kim E, Payne GF, Liu C. Role of polydopamine's redox-activity on its pro-oxidant, radical-scavenging, and antimicrobial activities. Acta Biomater 2019; 88:181-196. [PMID: 30818052 DOI: 10.1016/j.actbio.2019.02.032] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 02/12/2019] [Accepted: 02/22/2019] [Indexed: 11/25/2022]
Abstract
Polydopamine (PDA) is a bioinspired material and coating that offers diverse functional activities (e.g., photothermal, antioxidant, and antimicrobial) for a broad range of applications. Although PDA is reported to be redox active, the association between PDA's redox state and its functional performance has been difficult to discern because of PDA's complex structure and limitations in methods to characterize redox-based functions. Here, we use an electrochemical reverse engineering approach to confirm that PDA is redox-active and can repeatedly accept and donate electrons. We observed that the electron-donating ability of PDA offers the detrimental pro-oxidant effect of donating electrons to O2 to generate reactive oxygen species (ROS) or, alternatively, the beneficial antioxidant effect of quenching oxidative free radicals. Importantly, PDA's electron-donating ability depends on its redox state and is strongly influenced by external factors including metal ion binding as well as near-infrared (NIR) irradiation. Furthermore, we demonstrated that PDA possesses redox state-dependent antimicrobial properties in vitro and in vivo. We envision that clarification of PDA's redox activity will enable better understanding of PDA's context-dependent properties (e.g., antioxidant and pro-oxidant) and provide new insights for further applications of PDA. STATEMENT OF SIGNIFICANCE: We believe this is the first report to characterize the redox activities of polydopamine (PDA) and to relate these redox activities to functional properties important for various proposed applications of PDA. We observed that polydopamine nanoparticles 1) are redox-active; 2) can repeatedly donate and accept electrons; 3) can accept electrons from reducing agents (e.g., ascorbate), donate electrons to O2 to generate ROS, and donate electrons to free radicals to quench them; 4) have redox state-dependent electron-donating abilities that are strongly influenced by metal ion binding as well as NIR irradiation; and 5) have redox state-dependent antimicrobial activities.
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Iglesias D, Giuliani A, Melchionna M, Marchesan S, Criado A, Nasi L, Bevilacqua M, Tavagnacco C, Vizza F, Prato M, Fornasiero P. N-Doped Graphitized Carbon Nanohorns as a Forefront Electrocatalyst in Highly Selective O2 Reduction to H2O2. Chem 2018. [DOI: 10.1016/j.chempr.2017.10.013] [Citation(s) in RCA: 197] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yang X, Zhou R, Hao Y, Yang P. A CD44-biosensor for evaluating metastatic potential of breast cancer cells based on quartz crystal microbalance. Sci Bull (Beijing) 2017; 62:923-930. [PMID: 36659462 DOI: 10.1016/j.scib.2017.05.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Revised: 04/20/2017] [Accepted: 04/26/2017] [Indexed: 01/21/2023]
Abstract
A sensitive CD44-biosensor based on quartz crystal microbalance (QCM) was proposed for evaluating metastatic potential of breast cancer cells by using hyaluronan (HA) functionalized substrate film, polydopamine and polyethyleneimine composite film, for the purpose of capturing CD44-positive cancer cells through specific binding of HA to CD44. Two differently CD44-expressed breast cancer cell lines (MDA-MB-231 cells and MCF-7 cells) were put to use as targets for quantitative analysis as well as evaluation of metastatic potential of the cells. The limit of detection for MDA-MB-231 (M231) cells and MCF-7 cells were 300 and 1,000cellsmL-1, respectively. The expression level of CD44 on M231 cells exhibited two times higher than that of MCF-7 cells, indicating of a higher metastatic potential. Moreover, poly-L-lysine modified QCM sensor was applied to monitor the stiffness of breast cancer cells that can reflect metastatic potential of cells. The results revealed that the MCF-7 cells were stiffer than M231 cells, implying that the M231 cells possessed higher metastatic potential. The proposed protocol is simple and rapid to evaluate the metastatic potential of cancer cells, in addition to offering a promising diagnostic tool for metastatic cancer.
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Affiliation(s)
- Xiaojuan Yang
- Department of Chemistry, Jinan University, Guangzhou 510632, China
| | - Rongcheng Zhou
- Department of Chemistry, Jinan University, Guangzhou 510632, China
| | - Yan Hao
- Department of Chemistry, Jinan University, Guangzhou 510632, China
| | - Peihui Yang
- Department of Chemistry, Jinan University, Guangzhou 510632, China.
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Liu Y, Han Y, Chen R, Zhang H, Liu S, Liang F. In situ Immobilization of Copper Nanoparticles on Polydopamine Coated Graphene Oxide for H2O2 Determination. PLoS One 2016; 11:e0157926. [PMID: 27380524 PMCID: PMC4933376 DOI: 10.1371/journal.pone.0157926] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 06/07/2016] [Indexed: 11/29/2022] Open
Abstract
Nanostructured electrochemical sensors often suffer from irreversible aggregation and poor adhesion to the supporting materials, resulting in reduced sensitivity and selectivity over time. We describe a versatile method for fabrication of a H2O2 sensor by immobilizing copper nanoparticles (Cu NPs; 20 nm) on graphene oxide (GO) sheets via in-situ reduction of copper(II) on a polydopamine (PDA) coating on a glassy carbon electrode. The PDA film with its amino groups and catechol groups acts as both a reductant and an adhesive that warrants tight bonding between the Cu NPs and the support. The modified electrode, best operated at a working voltage of −0.4 V (vs. Ag/AgCl), has a linear response to H2O2 in the 5 μM to 12 mM concentration range, a sensitivity of 141.54 μA∙mM‾1∙cm‾2, a response time of 4 s, and a 1.4 μM detection limit (at an S/N ratio of 3). The sensor is highly reproducible and selective (with minimal interference to ascorbic acid and uric acid). The method was applied to the determination of H2O2 in sterilant by the standard addition method and gave recoveries between 97% and 99%.
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Affiliation(s)
- Yingzhu Liu
- The State Key Laboratory for Refractories and Metallurgy, School of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Yanwei Han
- The State Key Laboratory for Refractories and Metallurgy, School of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Rongsheng Chen
- The State Key Laboratory for Refractories and Metallurgy, School of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China
- Key Laboratory of Analytical Chemistry for Biology and Medicine of Ministry of Education, Wuhan University, Wuhan 430072, China
- Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences, Shanghai 200050, China
- * E-mail: (RSC); (FL)
| | - Haijun Zhang
- The State Key Laboratory for Refractories and Metallurgy, School of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Simin Liu
- The State Key Laboratory for Refractories and Metallurgy, School of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China
| | - Feng Liang
- The State Key Laboratory for Refractories and Metallurgy, School of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China
- Key Laboratory of Analytical Chemistry for Biology and Medicine of Ministry of Education, Wuhan University, Wuhan 430072, China
- * E-mail: (RSC); (FL)
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Electrochemical Detection of Hydrazine Using Poly(dopamine)-Modified Electrodes. SENSORS 2016; 16:s16050647. [PMID: 27164108 PMCID: PMC4883338 DOI: 10.3390/s16050647] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Revised: 04/22/2016] [Accepted: 05/03/2016] [Indexed: 12/05/2022]
Abstract
We have developed a simple and selective method for the electrochemical detection of hydrazine (HZ) using poly(dopamine) (pDA)-modified indium tin oxide (ITO) electrodes. Modification with pDA was easily achieved by submerging the ITO electrode in a DA solution for 30 min. The electrocatalytic oxidation of HZ on the pDA-modified ITO electrode was measured by cyclic voltammetry. In buffer solution, the concentration range for linear HZ detection was 100 µM–10 mM, and the detection limit was 1 µM. The proposed method was finally used to determine HZ in tap water to simulate the analysis of real samples. This method showed good recovery (94%–115%) and was not affected by the other species present in the tap water samples.
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