1
|
Li N, Huang X, Shao H. Exploring the pH Sensitivity of Ion-Pair Interactions on a Self-Assembled Monolayer by Scanning Electrochemical Microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6529-6538. [PMID: 37116313 DOI: 10.1021/acs.langmuir.3c00469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Insights into the chemical essence of weak interactions on the surface of biomacromolecules may help to regulate biological processes. In this work, the pH sensitivity of ion-pair interactions occurring on a cysteine self-assembled monolayer (Cys SAM) that simulates the local surface of a protein was probed by scanning electrochemical microscopy (SECM). Cys SAM and the ion-pair interactions subsequently formed with the introduced aspartic acid (Asp) were both pH-sensitive, as confirmed by the tip current changes in the feedback mode. After continuous pH measurements, the most significant negative feedback was observed at pH 5.50, indicating the most robust ion-pair interactions, which were simultaneously identified by voltammetry. In this case, the extra addition of the inorganic cation (i.e., Ca2+) did not disrupt the existing ion-pair interactions, and the binding constant (K) and Gibbs free energy (ΔGo) of the ion pair were finally determined to be 6.44 × 105 M-1 and -33.14 kJ mol-1, respectively. Overall, the pH sensitivity of ion-pair interactions was found to be mainly attributable to pH-induced changes in the deprotonated/protonated states of the α-amino acid moieties, which may provide insights into the artificial manipulation of complex binding events at the molecular level on the biological surface.
Collapse
Affiliation(s)
- Na Li
- Key Laboratory of Cluster Science (Ministry of Education), Beijing Key Laboratory of Photoelectronic and Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing102488, P. R. China
| | - Ximing Huang
- School of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, Hunan, P. R. China
| | - Huibo Shao
- Key Laboratory of Cluster Science (Ministry of Education), Beijing Key Laboratory of Photoelectronic and Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing102488, P. R. China
| |
Collapse
|
2
|
Thai VP, Nguyen HD, Saito N, Takahashi K, Sasaki T, Kikuchi T. Precise size-control and functionalization of gold nanoparticles synthesized by plasma-liquid interactions: using carboxylic, amino, and thiol ligands. NANOSCALE ADVANCES 2022; 4:4490-4501. [PMID: 36341298 PMCID: PMC9595108 DOI: 10.1039/d2na00542e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 08/17/2022] [Indexed: 06/16/2023]
Abstract
Using gold nanoparticles (GNPs) in high-standard applications requires GNPs to be fabricated with high-quality size and surface properties. Plasma-liquid interactions (PLIs) have the unique ability to synthesize GNPs without using any reducing agents, and the GNP surface is free of stabilizing agents. It is an extreme advantage that ensures success for the subsequent functionalization processes for GNPs. However, fabricating GNPs via PLIs at the desired size has still been a challenge. Here, we present a simple approach to achieving the precise size-control of GNPs synthesized by PLIs. By adding suitable ligands to the precursor solution, the ligands wrap GNPs which interrupts and slows down the rapid growth of GNPs under PLIs. This way, the size of the GNPs can be precisely controlled by adjusting the ligand concentration. Our results showed that the size of the GNPs in the range of 10-60 nm can be fitted to reciprocal functions of the ligand concentration. The potency of the size-control depends on the type of ligands in the order of thiol > amine > carboxylate. The size-control has been well investigated with four common ligands: l-cysteine, glucosamine, salicylic acid, and terephthalic acid. XPS, FTIR, and zeta potential techniques confirmed the presence of these ligands on GNPs. The results indicated that functionalized ligands could be utilized to control the size and functionalize the GNP surface. Hence our approach could simultaneously achieve two goals: precise size-control and functionalization of GNPs without the ligand-exchange step.
Collapse
Affiliation(s)
- Van-Phuoc Thai
- Faculty of Mechanical Engineering, HCMC University of Technology and Education Ho Chi Minh City 71307 Vietnam
- Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology Nagaoka 940-2188 Japan
| | - Hieu Duy Nguyen
- Research Center for Advanced Measurement and Characterization, National Institute for Materials Science 1-1 Namiki Tsukuba Ibaraki 305-0044 Japan
| | - Nobuo Saito
- Department of Materials Science and Bioengineering, Nagaoka University of Technology Nagaoka 940-2188 Japan
| | - Kazumasa Takahashi
- Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology Nagaoka 940-2188 Japan
| | - Toru Sasaki
- Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology Nagaoka 940-2188 Japan
- Department of Science of Technology Innovation, Nagaoka University of Technology Nagaoka 940-2188 Japan
| | - Takashi Kikuchi
- Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology Nagaoka 940-2188 Japan
- Department of Nuclear Technology, Nagaoka University of Technology Nagaoka 940-2188 Japan
- Extreme Energy-Density Research Institute, Nagaoka University of Technology Nagaoka 940-2188 Japan
| |
Collapse
|
3
|
Shen H, Wang W, Wang M, Zhang W, Zhang Y, Kong X, Cao X. L-Cysteine self-assembled Au(1 1 1)-like nanoparticles modified indium tin oxide electrode for determination of dopamine in the present of uric acid. Microchem J 2022. [DOI: 10.1016/j.microc.2021.107043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
4
|
Rosenberg RA, Rozhkova EA, Novosad V. Investigations into Spin- and Unpolarized Secondary Electron-Induced Reactions in Self-Assembled Monolayers of Cysteine. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:2985-2992. [PMID: 33621100 DOI: 10.1021/acs.langmuir.1c00068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Cysteine is the simplest thiolated, chiral amino acid and is often used as the anchor for studies of self-assembled monolayers (SAMs) of complex biomolecules such as peptides. Understanding the interaction of SAMs of cysteine with low-energy secondary electrons (SEs) produced by X-rays can further our understanding of radiation damage in biomolecules. In particular, if the electrons are polarized, chiral-selective chemistry could have bearing on the origin of homochirality in nature. In the present paper, we use synchrotron radiation-based X-ray photoelectron spectroscopy to determine the changes that occur in the bonding of self-assembled layers of cysteine on gold as a result of soft X-ray irradiation. To investigate the possibility of chiral selectivity resulting from the interaction of low-energy, spin-polarized SEs (SPSEs), measurements were conducted on cysteine adsorbed on a 3 nm-thick gold layer deposited on a CoPt thin-film multilayer with perpendicular magnetic anisotropy. Time-dependent measurements of the C 1s, N 1s, O 1s, S 2p, and Au 4f core levels are used to follow the changes in surface chemistry and determine reaction cross-sections as a function of SE exposure. Analysis of the data results in cross-sections in the range of 5-7 Mb and suggests possible reaction pathways. Changing the magnetization direction of the CoPt multilayer produces SPSEs with opposite polarity. Some evidence of spin-dependent reactions is indicated but is inconclusive. Possible reasons for the discrepancy are posited.
Collapse
Affiliation(s)
- R A Rosenberg
- Advanced Photon Source, Argonne National Laboratory, Lemont Illinois 60439, United States
| | - E A Rozhkova
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont Illinois 60439, United States
| | - V Novosad
- Material Science Division, Argonne National Laboratory, Lemont Illinois 60439, United States
| |
Collapse
|
5
|
Awuah JB, Walsh TR. Predictions of Pattern Formation in Amino Acid Adlayers at the In Vacuo Graphene Interface: Influence of Termination State. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1903403. [PMID: 31663292 DOI: 10.1002/smll.201903403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 09/17/2019] [Indexed: 06/10/2023]
Abstract
Controlled self-assembly of biomolecules on graphene offers a pathway for realizing its full potential in biological applications. Microscopy has revealed the self-assembly of amino acid adlayers into dimer rows on nonreactive substrates. However, neither the spontaneous formation of these patterns, nor the influence of amino acid termination state on the formation of patterns has been directly resolved to date. Molecular dynamics simulations, with the ability to reveal atomic level details and exert full control over the termination state, are used here to model initially disordered adlayers of neutral, zwitterionic, and neutral-zwitterionic mixtures for two types of amino acids, tryptophan and methionine, adsorbed on graphene in vacuo. The simulations of the zwitterion-containing adlayers exhibit the spontaneous emergence of dimer row ordering, mediated by charge-driven intermolecular interactions. In contrast, adlayers containing only neutral species do not assemble into ordered patterns. It is also found that the presence of trace amounts of water reduces the interamino acid interactions in the adlayers, but does not induce or disrupt pattern formation. Overall, the findings reveal the balance between the lateral interamino acid interactions and amino acid-graphene interactions, providing foundational insights for ultimately realizing the predictable pattern formation of biomolecules adsorbed on unreactive surfaces.
Collapse
Affiliation(s)
- Joel B Awuah
- Institute for Frontier Materials, Deakin University, Geelong, VIC, 3216, Australia
| | - Tiffany R Walsh
- Institute for Frontier Materials, Deakin University, Geelong, VIC, 3216, Australia
| |
Collapse
|
6
|
Olenin AY. Chemically Modified Silver and Gold Nanoparticles in Spectrometric Analysis. JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1134/s1061934819040099] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
7
|
Zhao W, Wang RY, Wei H, Li J, Ji Y, Jiang X, Wu X, Zhang X. Recognition of chiral zwitterionic interactions at nanoscale interfaces by chiroplasmonic nanosensors. Phys Chem Chem Phys 2018; 19:21401-21406. [PMID: 28783186 DOI: 10.1039/c7cp03004e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ability to detect chiral molecules renders plasmonic nanosensors as promising tools for the study of chirality phenomena in living systems. Using gold nanorod based plasmonic nanosensors, we investigated here typically chiral zwitterionic electrostatic (Zw-Es) and hydrogen-bonding (Hb) interactions occurring via amine and carboxylic groups at nanoscale interfaces in aqueous solutions. Our results reveal that the plasmonic circular dichroism responses of the nanosensors can have both conformational sensitivity and chiral selectivity to the interfacial molecular interactions. Such a dual function of the plasmonic nanosensors enables a new chiroptical way to differentiate between chiral Zw-Es and Hb interactions, to monitor the transformation between these two interaction forces, and particularly to recognize homochiral Zw-Es interactions in solution. Together with the surface enhanced Raman scattering (SERS) technique, this plasmonic CD based biosensing could have important values for the insightful understanding of chirality-dependent molecular recognition in biological and pharmaceutical systems.
Collapse
Affiliation(s)
- Wenjing Zhao
- The Key Laboratory of Cluster Science of Ministry of Education, School of Physics, Beijing Institute of Technology, 100081 Beijing, China.
| | | | | | | | | | | | | | | |
Collapse
|
8
|
Wang C, Luo X, Jia Z. Linkage, charge state and layer of L-Cysteine on copper surfaces. Colloids Surf B Biointerfaces 2017; 160:33-39. [PMID: 28915499 DOI: 10.1016/j.colsurfb.2017.09.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Revised: 08/24/2017] [Accepted: 09/06/2017] [Indexed: 11/17/2022]
Abstract
The control of linkage and charge state between biomolecules and metals represents a key issue for the architect of bioactive systems. In this paper, the linkage, charge state and layer of L-Cysteine (L-Cys) self-assembled films were handled on copper surfaces at pH=6.86. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were performed to measure the film quality and the details of self-assembled progress. X-ray photoelectron spectroscopy (XPS) and quantum chemical calculations of density functional theory (DFT) were used to characterize the linkage, charge state and layer of the L-Cys molecules on copper surfaces. The results indicate that, from 0s to 24h, the self-assembled process can be classified as three steps, fast adsorption at the beginning, and then rearrangement to form a monolayer, and then the formation of double layer. And L-Cys molecules link to the copper surface through CuS bond, not CuN bond. The thickness of monolayer is 10.5Å. Then the L-Cys molecules of second layer recline on the first layer. Finally, by the interaction of amine group and carboxylic acid group between the two layers, the second self-assembled film stands uprightly, and the -S- group of the second layer point outward. The thickness of the double layer is 19.7Å. All the Cu/L-Cys films have negative charges because the pH (6.86) of the self-assembled solution is more than the isoelectric point of the L-Cys (5.05).
Collapse
Affiliation(s)
- Chuntao Wang
- Department of Chemistry, Taiyuan Normal University, Jinzhong, 030619, PR China; Institute of Energy and Environmental Electrochemistry, Taiyuan Normal University, Jinzhong, 030619, PR China.
| | - Xiaoxiao Luo
- Stuart School of Business, Illinois Institute of Technology, Chicago, 60661-3061,USA
| | - Zehui Jia
- Department of Chemistry, Taiyuan Normal University, Jinzhong, 030619, PR China; Institute of Energy and Environmental Electrochemistry, Taiyuan Normal University, Jinzhong, 030619, PR China
| |
Collapse
|
9
|
Lazarescu V, Toader AM, Enache M, Preda L, Anastasescu M, Dobrescu G, Negrila C, Lazarescu MF. Field - dipole interactions in L-cysteine-thiolate self assembled at p- and n-GaAs(100) electrodes. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.06.121] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
10
|
Karki I, Wang H, Geise NR, Wilson BW, Lewis JP, Gullion T. Tripeptides on Gold Nanoparticles: Structural Differences between Two Reverse Sequences as Determined by Solid-State NMR and DFT Calculations. J Phys Chem B 2015; 119:11998-2006. [PMID: 26308986 DOI: 10.1021/acs.jpcb.5b04299] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ichhuk Karki
- Department of Chemistry and ‡Department of
Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26505, United States
| | - Hong Wang
- Department of Chemistry and ‡Department of
Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26505, United States
| | - Natalie R. Geise
- Department of Chemistry and ‡Department of
Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26505, United States
| | - Brendan W. Wilson
- Department of Chemistry and ‡Department of
Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26505, United States
| | - James P. Lewis
- Department of Chemistry and ‡Department of
Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26505, United States
| | - Terry Gullion
- Department of Chemistry and ‡Department of
Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26505, United States
| |
Collapse
|
11
|
Interface Electronic Structures of the L-Cysteine on Noble Metal Surfaces Studied by Ultraviolet Photoelectron Spectroscopy. E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY 2015. [DOI: 10.1380/ejssnt.2015.373] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
12
|
Lazarescu V, Enache M, Anastasescu M, Dobrescu G, Negrila C, Lazarescu MF. Electrochemical impedance spectroscopy investigations on the L-cysteine-thiolate self-assembled monolayers formed at p-GaAs(100) electrodes. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.11.103] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|