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Clark RA, Yawitz T, Luchs L, Conrad T, Bartlebaugh O, Boyd H, Hargittai B. Tripeptide Self-Assembled Monolayers as Biocompatible Surfaces for Cytochrome c Electrochemistry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1414-1424. [PMID: 36688667 DOI: 10.1021/acs.langmuir.2c02682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Biocompatible tripeptide self-assembled monolayers (SAMs) are designed with a carboxylate group on the terminal amino acid (glutamate, aspartate, or amino adipate) to electrostatically attract the lysine groups around the heme crevice in horse heart cytochrome c (cyt c), creating an electroactive protein/tripeptide/Au interfacial structure. Exposing the peptide/Au electrode to cyt c resulted in an 11 ± 3 pmol/cm2 electroactive protein surface coverage. Topographical images of the interfacial structure are obtained down to single-protein resolution by atomic force microscopy. Uniform protein monolayer assemblies are formed on the Au electrode with no major surface roughness changes. The cyt c/peptide/Au electrode systems were examined electrochemically to probe surface charge effects on the redox thermodynamics and kinetics of cyt c. Neutralization of protein surface charge due to adsorption on anionic COOH-terminated SAMs was found to change the formal potential, as determined by cyclic voltammetry. The cyt c/peptide/Au electrodes exhibit formal potentials shifted to more positive values, have a surface carboxylic acid pKa of 6 or higher, and produce effective cyt c surface charges (Zox) of -6 to -14. The Marcus theory is utilized to determine the protein electron transfer rates, which are ∼5 times faster for cyt c/tripeptide/Au compared to cyt c/11-mercaptoundecanoic acid SAMs of similar chain lengths.
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Affiliation(s)
- Rose A Clark
- Department of Chemistry, Saint Francis University, 169 Lakeview Drive, P.O. Box 600, Loretto, Pennsylvania15940, United States
| | - Tanner Yawitz
- Department of Chemistry, Saint Francis University, 169 Lakeview Drive, P.O. Box 600, Loretto, Pennsylvania15940, United States
| | - Logan Luchs
- Department of Chemistry, Saint Francis University, 169 Lakeview Drive, P.O. Box 600, Loretto, Pennsylvania15940, United States
| | - Tiffany Conrad
- Department of Chemistry, Saint Francis University, 169 Lakeview Drive, P.O. Box 600, Loretto, Pennsylvania15940, United States
| | - Owen Bartlebaugh
- Department of Chemistry, Saint Francis University, 169 Lakeview Drive, P.O. Box 600, Loretto, Pennsylvania15940, United States
| | - Hannah Boyd
- Department of Chemistry, Saint Francis University, 169 Lakeview Drive, P.O. Box 600, Loretto, Pennsylvania15940, United States
| | - Balazs Hargittai
- Department of Chemistry, Saint Francis University, 169 Lakeview Drive, P.O. Box 600, Loretto, Pennsylvania15940, United States
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Fan A, Chen J, Li N, Guo H, Li X, Zhang L, Shao H. Probing Ca2+-induced electron transfer on the surface of self-assembled monolayer using SECM. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Li N, Chen J, Huang X, Guo H, Li X, Fan A, Shao H. Competition of ion-pair during the transition from hydrogen bonding to electrostatic interaction on self-assembled monolayer. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Pardehkhorram R, Alshawawreh F, Gonçales VR, Lee NA, Tilley RD, Gooding JJ. Functionalized Gold Nanorod Probes: A Sophisticated Design of SERS Immunoassay for Biodetection in Complex Media. Anal Chem 2021; 93:12954-12965. [PMID: 34520166 DOI: 10.1021/acs.analchem.1c02557] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Surface-enhanced Raman scattering (SERS) probes offer considerable opportunities in label-based biosensing and analysis. However, achieving specific and reproducible performance, where low detection limits are needed in complex media, remains a challenge. Herein, we present a general strategy employing gold nanorod SERS probes and rationally designed surface chemistry involving protein resistant layers and antibodies to allow for the selective detection of species in complex media. By utilizing the ability of gold nanorods for selective surface modification, Raman reporters (4-mercaptobenzoic acid) were attached to the tips. Importantly, the sides of the nanorods were modified using a mixed layer of two different length stabilizing ligands (carboxyl-terminated oligo ethylene glycols) to ensure colloidal stability, while antibodies were attached to the stabilizing ligands. The nanoparticle interfacial design improves the colloidal stability, unlocks the capability of the probes for targeting biomolecules in complex matrices, and gives the probes the high SERS efficiency. The utility of this probe is demonstrated herein via the detection of Salmonella bacteria at the single bacterium level in complex food matrices using an anti-Salmonella IgG antibody-conjugated probe. The modular nature of the surface chemistry enables the SERS probes to be employed with a molecularly diverse range of biorecognition species (e.g., antibodies and peptides) for many different analytes, thus opening up new opportunities for efficient biosensing applications.
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Affiliation(s)
- Raheleh Pardehkhorram
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Fida'A Alshawawreh
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Vinicius R Gonçales
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - N Alice Lee
- ARC Training Centre for Advanced Technologies in Food Manufacture (ATFM), School of Chemical Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Richard D Tilley
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia.,Electron Microscope Unit, Mark Wainwright Analytical Centre, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - J Justin Gooding
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, New South Wales 2052, Australia
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Silveira CM, Zumpano R, Moreira M, Almeida MP, Oliveira MJ, Bento M, Montez C, Paixão I, Franco R, Pereira E, Almeida MG. Star‐Shaped Gold Nanoparticles as Friendly Interfaces for Protein Electrochemistry: the Case Study of Cytochrome
c. ChemElectroChem 2019. [DOI: 10.1002/celc.201901393] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Célia M. Silveira
- UCIBIO, REQUIMTE Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Monte de Caparica Portugal
| | - Rosaceleste Zumpano
- Department of Chemistry and Drug Technologies Sapienza University of Rome Piazzale Aldo Moro 5 00185 Rome Italy
| | - Miguel Moreira
- UCIBIO, REQUIMTE Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Monte de Caparica Portugal
| | - Miguel Peixoto Almeida
- LAQV, REQUIMTE, Dep. Química e Bioquímica Faculdade de Ciências Universidade do Porto 4169-007 Porto Portugal
| | - Maria João Oliveira
- UCIBIO, REQUIMTE Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Monte de Caparica Portugal
- i3 N/CENIMAT, Dep. Ciência dos Materiais Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa and CEMOP/UNINOVA 2829-516 Caparica Portugal
| | - Marina Bento
- UCIBIO, REQUIMTE Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Monte de Caparica Portugal
| | - Cláudia Montez
- UCIBIO, REQUIMTE Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Monte de Caparica Portugal
| | - Inês Paixão
- UCIBIO, REQUIMTE Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Monte de Caparica Portugal
| | - Ricardo Franco
- UCIBIO, REQUIMTE Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Monte de Caparica Portugal
| | - Eulália Pereira
- LAQV, REQUIMTE, Dep. Química e Bioquímica Faculdade de Ciências Universidade do Porto 4169-007 Porto Portugal
| | - M. Gabriela Almeida
- UCIBIO, REQUIMTE Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Monte de Caparica Portugal
- Centro de Investigação Interdisciplinar Egas Moniz (CiiEM) Instituto Superior de Ciências da Saúde Egas Moniz Campus Universitário, Quinta da Granja 2829-511 Caparica Portugal
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Huang X, Chen J, Yan C, Shao H. Probing a Reversible Cationic Switch on a Mixed Self-Assembled Monolayer Using Scanning Electrochemical Microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10772-10779. [PMID: 31361491 DOI: 10.1021/acs.langmuir.9b01429] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Probing a switch on biomimic membrane surfaces would offer some references to the research on permeability of cytomembranes. In this work, a mixed 11-mercaptoundecanoic acid/1-undecanethiol self-assembled monolayer (MUA/UT SAM) was constructed as a model of a biomembrane. In this mixed SAM, the MUA molecules work as functional parts for the switch and the UT molecules work as diluents. The surface coverage, wetting property, and pKa of this mixed SAM all have been well-inspected. The mixed SAM exhibits excellent switchable properties for cations, which is well-monitored by scanning electrochemical microscopy. When the pH of a solution is higher than the pKa, protons would stimulate a shift of dissociation equilibrium of terminal carboxyl groups. The dissociated carboxylate ions would lead to a switch on the state of the SAM. Otherwise, the SAM shows an off state when the pH is lower than the pKa. In addition, the repeatability, applicability, and the mechanism of the switch all have been well-evaluated.
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Affiliation(s)
- Ximing Huang
- Beijing Key Laboratory of Photoelectronic and Electrophotonic Conversion Materials, Key Laboratory of Cluster Science (Ministry of Education), School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 102488 , P. R. China
| | - Jingchao Chen
- Beijing Key Laboratory of Photoelectronic and Electrophotonic Conversion Materials, Key Laboratory of Cluster Science (Ministry of Education), School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 102488 , P. R. China
| | - Chunxia Yan
- Beijing Key Laboratory of Photoelectronic and Electrophotonic Conversion Materials, Key Laboratory of Cluster Science (Ministry of Education), School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 102488 , P. R. China
| | - Huibo Shao
- Beijing Key Laboratory of Photoelectronic and Electrophotonic Conversion Materials, Key Laboratory of Cluster Science (Ministry of Education), School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 102488 , P. R. China
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Pham XH, Hahm E, Kang E, Son BS, Ha Y, Kim HM, Jeong DH, Jun BH. Control of Silver Coating on Raman Label Incorporated Gold Nanoparticles Assembled Silica Nanoparticles. Int J Mol Sci 2019; 20:ijms20061258. [PMID: 30871136 PMCID: PMC6471565 DOI: 10.3390/ijms20061258] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 03/06/2019] [Accepted: 03/09/2019] [Indexed: 11/16/2022] Open
Abstract
Signal reproducibility in surface-enhanced Raman scattering (SERS) remains a challenge, limiting the scope of the quantitative applications of SERS. This drawback in quantitative SERS sensing can be overcome by incorporating internal standard chemicals between the core and shell structures of metal nanoparticles (NPs). Herein, we prepared a SERS-active core Raman labeling compound (RLC) shell material, based on Au⁻Ag NPs and assembled silica NPs (SiO₂@Au@RLC@Ag NPs). Three types of RLCs were used as candidates for internal standards, including 4-mercaptobenzoic acid (4-MBA), 4-aminothiophenol (4-ATP) and 4-methylbenzenethiol (4-MBT), and their effects on the deposition of a silver shell were investigated. The formation of the Ag shell was strongly dependent on the concentration of the silver ion. The negative charge of SiO₂@Au@RLCs facilitated the formation of an Ag shell. In various pH solutions, the size of the Ag NPs was larger at a low pH and smaller at a higher pH, due to a decrease in the reduction rate. The results provide a deeper understanding of features in silver deposition, to guide further research and development of a strong and reliable SERS probe based on SiO₂@Au@RLC@Ag NPs.
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Affiliation(s)
- Xuan-Hung Pham
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea.
| | - Eunil Hahm
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea.
| | - Eunji Kang
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea.
| | - Byung Sung Son
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea.
| | - Yuna Ha
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea.
| | - Hyung-Mo Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea.
| | - Dae Hong Jeong
- Department of Chemistry Education and Center for Educational Research, Seoul National University, Seoul 151-742, Korea.
| | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea.
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Ma J, Mandal S, Bronsther C, Gao Z, Eisenthal KB. Second harmonic study of acid-base equilibrium at gold nanoparticle/aqueous interface. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2016.12.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pissinis DE, Linarez Pérez OE, Cometto FP, López Teijelo M. Preparation and characterization of self assembled monolayers of 2-mercaptonicotinic acid on Au(111). J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2013.11.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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