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Fellows AP, Duque ÁD, Balos V, Lehmann L, Netz RR, Wolf M, Thämer M. How Thick is the Air-Water Interface?─A Direct Experimental Measurement of the Decay Length of the Interfacial Structural Anisotropy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39171356 DOI: 10.1021/acs.langmuir.4c02571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
The air-water interface is a highly prevalent phase boundary impacting many natural and artificial processes. The significance of this interface arises from the unique properties of water molecules within the interfacial region, with a crucial parameter being the thickness of its structural anisotropy, or "healing depth". This quantity has been extensively assessed by various simulations which have converged to a prediction of a remarkably short length of ∼6 Å. Despite the absence of any direct experimental measurement of this quantity, this predicted value has surprisingly become widely accepted as fact. Using an advancement in nonlinear vibrational spectroscopy, we provide the first measurement of this thickness and, indeed, find it to be ∼6-8 Å, finally confirming the prior predictions. Lastly, by combining the experimental results with depth-dependent second-order spectra calculated from ab initio parametrized molecular dynamics simulations, which are also in excellent agreement with this experimental result, we shed light on this surprisingly short correlation length of molecular orientations at the interface.
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Affiliation(s)
- Alexander P Fellows
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Álvaro Díaz Duque
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Vasileios Balos
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanociencia), 28049 Madrid, Spain
| | - Louis Lehmann
- Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Roland R Netz
- Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Martin Wolf
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Martin Thämer
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
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2
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Yang YL, Meng ZD, Wang HL, Zheng JR, Tian ZQ, Yi J. Taking Photoacoustic Force into Account in Liquid-Phase Peak Force Infrared Microscopy. J Phys Chem Lett 2024; 15:8233-8239. [PMID: 39102567 DOI: 10.1021/acs.jpclett.4c01789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
The microscopic structure of the material's solid-liquid interface significantly influences its physicochemical properties. Peak force infrared microscopy (PFIR) is a powerful technique for analyzing these interfaces at the nanoscale, revealing crucial structure-activity relationships. PFIR is recognized for its explicit photothermal signal generation mechanism but tends to overlook other photoinduced forces, which can disturb the obtained infrared spectra, thereby reducing spectral signal-to-noise ratio (SNR) and sensitivity. We have developed a multiphysics-coupled theoretical model to assess the magnitudes of various photoinduced forces in PFIR experiments and have found that the magnitude of the photoacoustic force is comparable to that of the photothermal expansion force in a liquid environment. Our calculations show that through simple modulation of the pulse waveform it is possible to effectively suppress the photoacoustic interference, thereby improving the SNR and sensitivity of PFIR. This work aims to alert researchers to the potential for strong photoacoustic interference in liquid-phase PFIR measurements and enhance the performance of PFIR by clarifying the photoinduced forces entangled in the signals.
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Affiliation(s)
- Yu-Lin Yang
- School of Electronic Science and Engineering, Fujian Key Laboratory of Ultrafast Laser Technology and Applications, College of Chemistry and Chemical Engineering, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China
| | - Zhao-Dong Meng
- School of Electronic Science and Engineering, Fujian Key Laboratory of Ultrafast Laser Technology and Applications, College of Chemistry and Chemical Engineering, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China
| | - Hai-Long Wang
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (iKKEM), Xiamen 361005, China
| | - Jun-Rong Zheng
- School of Electronic Science and Engineering, Fujian Key Laboratory of Ultrafast Laser Technology and Applications, College of Chemistry and Chemical Engineering, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China
| | - Zhong-Qun Tian
- School of Electronic Science and Engineering, Fujian Key Laboratory of Ultrafast Laser Technology and Applications, College of Chemistry and Chemical Engineering, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (iKKEM), Xiamen 361005, China
| | - Jun Yi
- School of Electronic Science and Engineering, Fujian Key Laboratory of Ultrafast Laser Technology and Applications, College of Chemistry and Chemical Engineering, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (iKKEM), Xiamen 361005, China
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Jin Y, Yang S, Sun M, Gao S, Cheng Y, Wu C, Xu Z, Guo Y, Xu W, Gao X, Wang S, Huang B, Wang Z. How liquids charge the superhydrophobic surfaces. Nat Commun 2024; 15:4762. [PMID: 38834547 DOI: 10.1038/s41467-024-49088-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 05/23/2024] [Indexed: 06/06/2024] Open
Abstract
Liquid-solid contact electrification (CE) is essential to diverse applications. Exploiting its full implementation requires an in-depth understanding and fine-grained control of charge carriers (electrons and/or ions) during CE. Here, we decouple the electrons and ions during liquid-solid CE by designing binary superhydrophobic surfaces that eliminate liquid and ion residues on the surfaces and simultaneously enable us to regulate surface properties, namely work function, to control electron transfers. We find the existence of a linear relationship between the work function of superhydrophobic surfaces and the as-generated charges in liquids, implying that liquid-solid CE arises from electron transfer due to the work function difference between two contacting surfaces. We also rule out the possibility of ion transfer during CE occurring on superhydrophobic surfaces by proving the absence of ions on superhydrophobic surfaces after contact with ion-enriched acidic, alkaline, and salt liquids. Our findings stand in contrast to existing liquid-solid CE studies, and the new insights learned offer the potential to explore more applications.
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Affiliation(s)
- Yuankai Jin
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, PR China
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong SAR, PR China
| | - Siyan Yang
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, PR China
| | - Mingzi Sun
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong SAR, PR China
| | - Shouwei Gao
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, PR China
| | - Yaqi Cheng
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong SAR, PR China
| | - Chenyang Wu
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong SAR, PR China
| | - Zhenyu Xu
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong SAR, PR China
| | - Yunting Guo
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong SAR, PR China
| | - Wanghuai Xu
- Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, PR China
| | - Xuefeng Gao
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, PR China
| | - Steven Wang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong SAR, PR China
| | - Bolong Huang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong SAR, PR China.
| | - Zuankai Wang
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, PR China.
- Research Centre for Nature-Inspired Science and Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, PR China.
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4
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Gunwant V, Gahtori P, Varanasi SR, Pandey R. Protein-Mediated Changes in Membrane Fluidity and Ordering: Insights into the Molecular Mechanism and Implications for Cellular Function. J Phys Chem Lett 2024; 15:4408-4415. [PMID: 38625684 DOI: 10.1021/acs.jpclett.3c03627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Probing protein-membrane interactions is vital for understanding biological functionality for various applications such as drug development, targeted drug delivery, and creation of functional biomaterials for medical and industrial purposes. In this study, we have investigated interaction of Human Serum Albumin (HSA) with two different lipids, dipalmitoylphosphatidylglycerol (dDPPG) and dipalmitoylphosphatidylcholine (dDPPC), using Vibrational Sum Frequency Generation spectroscopy at different membrane fluidity values. In the liquid-expanded (LE) state of the lipid, HSA (at pH 3.5) deeply intercalated lipid chains through a combination of electrostatic and hydrophobic interactions, which resulted in more ordering of the lipid chains. However, in the liquid-condensed (LC) state, protein intercalation is decreased due to tighter lipid packing. Moreover, our findings revealed distinct differences in HSA's interaction with dDPPG and dDPPC lipids. The interaction with dDPPC remained relatively weak compared to dDPPG. These results shed light on the significance of protein mediated changes in lipid characteristics, which hold considerable implications for understanding membrane protein behavior, lipid-mediated cellular processes, and lipid-based biomaterial design.
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Affiliation(s)
- Vineet Gunwant
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Preeti Gahtori
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Srinivasa Rao Varanasi
- Department of Physics, Sultan Qaboos University, P.O. Box 36, Al-Khoud 123, Muscat, Oman
| | - Ravindra Pandey
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
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Zhou J, Jing G, Zhao T, Tian F, Xu X, Zhao S. Unraveling Flow Effect on Capacitive Energy Extraction from Salinity Gradients. ACS APPLIED MATERIALS & INTERFACES 2024; 16:10052-10060. [PMID: 38367217 DOI: 10.1021/acsami.3c16738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/19/2024]
Abstract
The harvesting of salinity gradient energy through a capacitive double-layer expansion (CDLE) technique is directly associated with ion adsorption and desorption in electrodes. Herein, we show that energy extraction can be modulated by regulating ion adsorption/desorption through water flow. The flow effects on the output energy, capacitance, and energy density under practical conditions are systematically investigated from a theoretical perspective, upon which the optimal operating condition is identified for energy extraction. We demonstrate that the net charge accumulation displays a negative correlation with the water flow velocity and so does the surface charge density, and this causes a nontrivial variation in the magnitude of output energy when water flows are introduced. When high water flows are introduced in both the charging and discharging processes, the energy extraction can be significantly reduced by 47.69-49.32%. However, when a high flow is solely exerted in the discharging process, the energy extraction can be enhanced by 12.94-14.49% even at low operation voltages. This study not only offers a comprehensive understanding of the microscopic mechanisms of surface-engineered energy extraction with water flows but also provides a novel direction for energy extraction enhancement.
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Affiliation(s)
- Jingmin Zhou
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology and School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Gang Jing
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Teng Zhao
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
- Institute of Natural Sciences, Shanghai National Center for Applied Mathematics, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fengrui Tian
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaofei Xu
- State Key Laboratory of Chemical Engineering and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Shuangliang Zhao
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology and School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
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Wang Y, Seki T, Gkoupidenis P, Chen Y, Nagata Y, Bonn M. Aqueous chemimemristor based on proton-permeable graphene membranes. Proc Natl Acad Sci U S A 2024; 121:e2314347121. [PMID: 38300862 PMCID: PMC10861866 DOI: 10.1073/pnas.2314347121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 11/30/2023] [Indexed: 02/03/2024] Open
Abstract
Memristive devices, electrical elements whose resistance depends on the history of applied electrical signals, are leading candidates for future data storage and neuromorphic computing. Memristive devices typically rely on solid-state technology, while aqueous memristive devices are crucial for biology-related applications such as next-generation brain-machine interfaces. Here, we report a simple graphene-based aqueous memristive device with long-term and tunable memory regulated by reversible voltage-induced interfacial acid-base equilibria enabled by selective proton permeation through the graphene. Surface-specific vibrational spectroscopy verifies that the memory of the graphene resistivity arises from the hysteretic proton permeation through the graphene, apparent from the reorganization of interfacial water at the graphene/water interface. The proton permeation alters the surface charge density on the CaF2 substrate of the graphene, affecting graphene's electron mobility, and giving rise to synapse-like resistivity dynamics. The results pave the way for developing experimentally straightforward and conceptually simple aqueous electrolyte-based neuromorphic iontronics using two-dimensional (2D) materials.
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Affiliation(s)
- Yongkang Wang
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing211189, China
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Mainz55128, Germany
| | - Takakazu Seki
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Mainz55128, Germany
| | - Paschalis Gkoupidenis
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Mainz55128, Germany
| | - Yunfei Chen
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing211189, China
| | - Yuki Nagata
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Mainz55128, Germany
| | - Mischa Bonn
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Mainz55128, Germany
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7
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Xu D, Yan M, Xie Y. Energy harvesting from water streaming at charged surface. Electrophoresis 2024; 45:244-265. [PMID: 37948329 DOI: 10.1002/elps.202300102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 09/15/2023] [Accepted: 10/26/2023] [Indexed: 11/12/2023]
Abstract
Water flowing at a charged surface may produce electricity, known as streaming current/potentials, which may be traced back to the 19th century. However, due to the low gained power and efficiencies, the energy conversion from streaming current was far from usable. The emergence of micro/nanofluidic technology and nanomaterials significantly increases the power (density) and energy conversion efficiency. In this review, we conclude the fundamentals and recent progress in electrical double layers at the charged surface. We estimate the generated power by hydrodynamic energy dissipation in multi-scaling flows considering the viscous systems with slipping boundary and inertia systems. Then, we review the coupling of volume flow and current flow by the Onsager relation, as well as the figure of merits and efficiency. We summarize the state-of-the-art of electrokinetic energy conversions, including critical performance metrics such as efficiencies, power densities, and generated voltages in various systems. We discuss the advantages and possible constraints by the figure of merits, including single-phase flow and flying droplets.
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Affiliation(s)
- Daxiang Xu
- School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, P. R. China
| | - Meng Yan
- School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, P. R. China
| | - Yanbo Xie
- School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, P. R. China
- School of Aeronautics and Institute of Extreme Mechanics, Northwestern Polytechnical University, Xi'an, P. R. China
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8
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McNamee CE, Tokuyama M, Yamamoto S. Effect of Audible Sounds on the Forces Acting between Charged Surfaces in Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1177-1184. [PMID: 38128911 DOI: 10.1021/acs.langmuir.3c02203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
We aimed to determine if audible sounds could change the forces acting between charged surfaces in water and their electric double layers (EDLs). This was achieved by using an atomic force microscope to measure force-distance curves between a microsized silica particle attached to a cantilever (probe) and a silicon wafer in water in the absence and presence of sound. Sound decreased the repulsive forces acting between the probe and silicon wafer, where the range and magnitude of the forces decreased with an increase in the sound frequency from 300 to 15000 Hz. The decrease in the force range was explained by a decrease in the EDL thickness. This result was explained by (1) the shrinkage of the EDL by a high-pressure region of the sound wave, where an increased sound frequency caused the number of high-pressure regions that passed between the probe and the substrate to increase and (2) the inability of the EDL to fully re-expand to its original thickness during the time that a low-pressure region of the sound wave was applied. The decrease in the force magnitude with a sound frequency increase was explained by the increased screening of charged surfaces that accompanies a decrease in the EDL thickness. An increase in the force measurement speed caused the sound waves to reduce the repulsive forces less. A faster speed decreased the time to measure a force curve, which reduced the number of high-pressure regions of the sound wave to pass through the water between the probe and the substrate. This reduced the number of times that the EDL was compressed by the sound wave.
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Affiliation(s)
- Cathy E McNamee
- Shinshu University, Tokida 3-15-1, Ueda-shi, Nagano-ken 386-8567, Japan
| | - Miri Tokuyama
- Shinshu University, Tokida 3-15-1, Ueda-shi, Nagano-ken 386-8567, Japan
| | - Shinpei Yamamoto
- Sankei Giken Kogyo Co., Ltd., 1069-1, Toyazuka, Isesaki, Gunma 372-0825, Japan
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Ge X, Fan Y, Zhai H, Chi J, Putnis CV, Wang L, Zhang W. Direct observations of nanoscale brushite dissolution by the concentration-dependent adsorption of phosphate or phytate. WATER RESEARCH 2024; 248:120851. [PMID: 37976955 DOI: 10.1016/j.watres.2023.120851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/05/2023] [Accepted: 11/08/2023] [Indexed: 11/19/2023]
Abstract
With the development of agricultural intensification, phosphorus (P) accumulation in croplands and sediments has resulted in the increasingly widespread interaction between inorganic and organic P species, which has been, previously, underestimated or even ignored. We quantified the nanoscale dissolution kinetics of sparingly soluble brushite (CaHPO4·2H2O, DCPD) over a broad range of phosphate and/or phytate concentrations by using in situ atomic force microscopy (AFM). Compared to water, we found that low concentrations of phosphate (1-1000 µM) or phytate (1-100 µM) inhibited brushite dissolution by slowing single step retraction. However, with increasing phosphate or phytate concentrations to 10 mM, there was a reverse effect of dissolution promotion at brushite-water interfaces. In situ observations of the coupled dissolution-reprecipitation showed that phosphate precipitated more readily than phytate on brushite surfaces, with the formation of amorphous calcium phosphate (ACP). For a fundamental understanding, zeta potential and in situ Raman spectroscopy (RS) revealed that the concentration-dependent dissolution is attributed to the reverse of outer-sphere to inner-sphere adsorption with increasing phosphate or phytate concentrations. In addition, the mineralization of phytate with outer-sphere adsorption by phytase was higher than that with inner-spere adsorption, and the presence of phytate delayed ACP phase transformation to hydroxylapatite (HAP). These in situ observations and analyses may fill the knowledge gaps of interaction between inorganic and organic P species in P-rich terrestrial and aquatic environments, thereby implicating their biogeochemical cycling and the associated availability.
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Affiliation(s)
- Xinfei Ge
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
| | - Yuke Fan
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Hang Zhai
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI 53706, United States
| | - Jialin Chi
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Christine V Putnis
- Institut für Mineralogie, University of Münster, Münster 48149, Germany; School of Molecular and Life Sciences, Curtin University, Perth 6845, Australia
| | - Lijun Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenjun Zhang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
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Zhang D, Hu W. Improving Cycle Life of Zinc-Air Batteries with Calcium Ion Additive in Electrolyte or Separator. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1864. [PMID: 37368294 DOI: 10.3390/nano13121864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/07/2023] [Accepted: 06/11/2023] [Indexed: 06/28/2023]
Abstract
The electrolyte carbonation and the resulting air electrode plugging are the primary factors limiting the cycle life of aqueous alkaline zinc-air batteries (ZABs). In this work, calcium ion (Ca2+) additives were introduced into the electrolyte and the separator to resolve the above issues. Galvanostatic charge-discharge cycle tests were carried out to verify the effect of Ca2+ on electrolyte carbonation. With the modified electrolyte and separator, the cycle life of ZABs was improved by 22.2% and 24.7%, respectively. Ca2+ was introduced into the ZAB system to preferentially react with CO32- rather than K+ and then precipitated granular CaCO3 prior to K2CO3, which was deposited on the surface of the Zn anode and air cathode to form a flower-like CaCO3 layer, thereby prolonging its cycle life.
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Affiliation(s)
- Donghao Zhang
- Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, No. 135 Yaguan Road, Tianjin 300072, China
| | - Wenbin Hu
- Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), School of Materials Science and Engineering, Tianjin University, No. 135 Yaguan Road, Tianjin 300072, China
- Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, No. 135 Yaguan Road, Tianjin 300072, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350207, China
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11
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Bañuelos JL, Borguet E, Brown GE, Cygan RT, DeYoreo JJ, Dove PM, Gaigeot MP, Geiger FM, Gibbs JM, Grassian VH, Ilgen AG, Jun YS, Kabengi N, Katz L, Kubicki JD, Lützenkirchen J, Putnis CV, Remsing RC, Rosso KM, Rother G, Sulpizi M, Villalobos M, Zhang H. Oxide- and Silicate-Water Interfaces and Their Roles in Technology and the Environment. Chem Rev 2023; 123:6413-6544. [PMID: 37186959 DOI: 10.1021/acs.chemrev.2c00130] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Interfacial reactions drive all elemental cycling on Earth and play pivotal roles in human activities such as agriculture, water purification, energy production and storage, environmental contaminant remediation, and nuclear waste repository management. The onset of the 21st century marked the beginning of a more detailed understanding of mineral aqueous interfaces enabled by advances in techniques that use tunable high-flux focused ultrafast laser and X-ray sources to provide near-atomic measurement resolution, as well as by nanofabrication approaches that enable transmission electron microscopy in a liquid cell. This leap into atomic- and nanometer-scale measurements has uncovered scale-dependent phenomena whose reaction thermodynamics, kinetics, and pathways deviate from previous observations made on larger systems. A second key advance is new experimental evidence for what scientists hypothesized but could not test previously, namely, interfacial chemical reactions are frequently driven by "anomalies" or "non-idealities" such as defects, nanoconfinement, and other nontypical chemical structures. Third, progress in computational chemistry has yielded new insights that allow a move beyond simple schematics, leading to a molecular model of these complex interfaces. In combination with surface-sensitive measurements, we have gained knowledge of the interfacial structure and dynamics, including the underlying solid surface and the immediately adjacent water and aqueous ions, enabling a better definition of what constitutes the oxide- and silicate-water interfaces. This critical review discusses how science progresses from understanding ideal solid-water interfaces to more realistic systems, focusing on accomplishments in the last 20 years and identifying challenges and future opportunities for the community to address. We anticipate that the next 20 years will focus on understanding and predicting dynamic transient and reactive structures over greater spatial and temporal ranges as well as systems of greater structural and chemical complexity. Closer collaborations of theoretical and experimental experts across disciplines will continue to be critical to achieving this great aspiration.
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Affiliation(s)
- José Leobardo Bañuelos
- Department of Physics, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Eric Borguet
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Gordon E Brown
- Department of Earth and Planetary Sciences, The Stanford Doerr School of Sustainability, Stanford University, Stanford, California 94305, United States
| | - Randall T Cygan
- Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas 77843, United States
| | - James J DeYoreo
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Patricia M Dove
- Department of Geosciences, Department of Chemistry, Department of Materials Science and Engineering, Virginia Tech, Blacksburg, Virginia 24060, United States
| | - Marie-Pierre Gaigeot
- Université Paris-Saclay, Univ Evry, CNRS, LAMBE UMR8587, 91025 Evry-Courcouronnes, France
| | - Franz M Geiger
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Julianne M Gibbs
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2Canada
| | - Vicki H Grassian
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
| | - Anastasia G Ilgen
- Geochemistry Department, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Young-Shin Jun
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Nadine Kabengi
- Department of Geosciences, Georgia State University, Atlanta, Georgia 30303, United States
| | - Lynn Katz
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - James D Kubicki
- Department of Earth, Environmental & Resource Sciences, The University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Johannes Lützenkirchen
- Karlsruher Institut für Technologie (KIT), Institut für Nukleare Entsorgung─INE, Eggenstein-Leopoldshafen 76344, Germany
| | - Christine V Putnis
- Institute for Mineralogy, University of Münster, Münster D-48149, Germany
| | - Richard C Remsing
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Kevin M Rosso
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Gernot Rother
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Marialore Sulpizi
- Department of Physics, Ruhr Universität Bochum, NB6, 65, 44780, Bochum, Germany
| | - Mario Villalobos
- Departamento de Ciencias Ambientales y del Suelo, LANGEM, Instituto De Geología, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Huichun Zhang
- Department of Civil and Environmental Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
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12
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Boon WQ, Dijkstra M, van Roij R. Coulombic Surface-Ion Interactions Induce Nonlinear and Chemistry-Specific Charging Kinetics. PHYSICAL REVIEW LETTERS 2023; 130:058001. [PMID: 36800467 DOI: 10.1103/physrevlett.130.058001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 12/15/2022] [Indexed: 06/18/2023]
Abstract
While important for many industrial applications, chemical reactions responsible for the charging of solids in water are often poorly understood. We theoretically investigate the charging kinetics of solid-liquid interfaces and find that the time-dependent equilibration of surface charge contains key information not only on the reaction mechanism, but also on the valency of the reacting ions. We construct a nonlinear differential equation describing surface charging by combining chemical Langmuir kinetics and electrostatic Poisson-Boltzmann theory. Our results reveal a clear distinction between late-time (near-equilibrium) and short-time (far-from-equilibrium) relaxation rates, the ratio of which contains information on the charge valency and ad- or desorption mechanism of the charging process. Similarly, we find that single-ion reactions can be distinguished from two-ion reactions, as the latter show an inflection point during equilibration. Interestingly, such inflection points are characteristic of autocatalytic reactions, and we conclude that the Coulombic ion-surface interaction is an autocatalytic feedback mechanism.
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Affiliation(s)
- W Q Boon
- Institute for Theoretical Physics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, Netherlands
| | - M Dijkstra
- Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, Netherlands
| | - R van Roij
- Institute for Theoretical Physics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, Netherlands
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13
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Piontek S, Naujoks D, Tabassum T, DelloStritto MJ, Jaugstetter M, Hosseini P, Corva M, Ludwig A, Tschulik K, Klein ML, Petersen PB. Probing the Gold/Water Interface with Surface-Specific Spectroscopy. ACS PHYSICAL CHEMISTRY AU 2023; 3:119-129. [PMID: 36718265 PMCID: PMC9881240 DOI: 10.1021/acsphyschemau.2c00044] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/08/2022] [Accepted: 12/08/2022] [Indexed: 01/05/2023]
Abstract
Water is an integral component in electrochemistry, in the generation of the electric double layer, and in the propagation of the interfacial electric fields into the solution; however, probing the molecular-level structure of interfacial water near functioning electrode surfaces remains challenging. Due to the surface-specificity, sum-frequency-generation (SFG) spectroscopy offers an opportunity to investigate the structure of water near working electrochemical interfaces but probing the hydrogen-bonded structure of water at this buried electrode-electrolyte interface was thought to be impossible. Propagating the laser beams through the solvent leads to a large attenuation of the infrared light due to the absorption of water, and interrogating the interface by sending the laser beams through the electrode normally obscures the SFG spectra due to the large nonlinear response of conduction band electrons. Here, we show that the latter limitation is removed when the gold layer is thin. To demonstrate this, we prepared Au gradient films on CaF2 with a thickness between 0 and 8 nm. SFG spectra of the Au gradient films in contact with H2O and D2O demonstrate that resonant water SFG spectra can be obtained using Au films with a thickness of ∼2 nm or less. The measured spectra are distinctively different from the frequency-dependent Fresnel factors of the interface, suggesting that the features we observe in the OH stretching region indeed do not arise from the nonresonant response of the Au films. With the newfound ability to probe interfacial solvent structure at electrode/aqueous interfaces, we hope to provide insights into more efficient electrolyte composition and electrode design.
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Affiliation(s)
- Stefan
M. Piontek
- Faculty
of Chemistry and Biochemistry, Ruhr-Universität
Bochum, 44801 Bochum, Germany,Light
Conversion Inc., Vilnius City Municipality, Vilnius 10234, Lithuania
| | - Dennis Naujoks
- Faculty
of Mechanical Engineering, Institute for Materials and ZGH, Ruhr-Universität Bochum, 44801 Bochum, Germany
| | - Tadneem Tabassum
- Faculty
of Chemistry and Biochemistry, Ruhr-Universität
Bochum, 44801 Bochum, Germany
| | - Mark J. DelloStritto
- Institute
for Computational Molecular Science, Temple
University, Philadelphia, 19122 Pennsylvania, United States
| | | | - Pouya Hosseini
- Max-Planck-Institut
für Eisenforschung GmbH, 40237 Düsseldorf, Germany
| | - Manuel Corva
- Faculty
of Chemistry and Biochemistry, Ruhr-Universität
Bochum, 44801 Bochum, Germany
| | - Alfred Ludwig
- Faculty
of Mechanical Engineering, Institute for Materials and ZGH, Ruhr-Universität Bochum, 44801 Bochum, Germany
| | - Kristina Tschulik
- Faculty
of Chemistry and Biochemistry, Ruhr-Universität
Bochum, 44801 Bochum, Germany
| | - Michael L. Klein
- Institute
for Computational Molecular Science, Temple
University, Philadelphia, 19122 Pennsylvania, United States
| | - Poul B. Petersen
- Faculty
of Chemistry and Biochemistry, Ruhr-Universität
Bochum, 44801 Bochum, Germany,
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14
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Papaderakis AA, Polus K, Kant P, Box F, Etcheverry B, Byrne C, Quinn M, Walton A, Juel A, Dryfe RAW. Taming Electrowetting Using Highly Concentrated Aqueous Solutions. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:21071-21083. [PMID: 36561202 PMCID: PMC9761672 DOI: 10.1021/acs.jpcc.2c06517] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/10/2022] [Indexed: 06/17/2023]
Abstract
Wetting of carbon surfaces is one of the most widespread, yet poorly understood, physical phenomena. Control over wetting properties underpins the operation of aqueous energy-storage devices and carbon-based filtration systems. Electrowetting, the variation in the contact angle with an applied potential, is the most straightforward way of introducing control over wetting. Here, we study electrowetting directly on graphitic surfaces with the use of aqueous electrolytes to show that reversible control of wetting can be achieved and quantitatively understood using models of the interfacial capacitance. We manifest that the use of highly concentrated aqueous electrolytes induces a fully symmetric and reversible wetting behavior without degradation of the substrate within the unprecedented potential window of 2.8 V. We demonstrate where the classical "Young-Lippmann" models apply, and break down, and discuss reasons for the latter, establishing relations among the applied bias, the electrolyte concentration, and the resultant contact angle. The approach is extended to electrowetting at the liquid|liquid interface, where a concentrated aqueous electrolyte drives reversibly the electrowetting response of an insulating organic phase with a significantly decreased potential threshold. In summary, this study highlights the beneficial effect of highly concentrated aqueous electrolytes on the electrowettability of carbon surfaces, being directly related to the performance of carbon-based aqueous energy-storage systems and electronic and microfluidic devices.
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Affiliation(s)
- Athanasios A. Papaderakis
- Department
of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
- Henry
Royce Institute, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
| | - Kacper Polus
- Department
of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
- Photon
Science Institute, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
| | - Pallav Kant
- Department
of Physics and Astronomy, Manchester Center for Nonlinear Dynamics, University of Manchester, Oxford Road, ManchesterM13 9PL, United
Kingdom
| | - Finn Box
- Department
of Physics and Astronomy, Manchester Center for Nonlinear Dynamics, University of Manchester, Oxford Road, ManchesterM13 9PL, United
Kingdom
| | - Bruno Etcheverry
- Department
of Physics and Astronomy, Manchester Center for Nonlinear Dynamics, University of Manchester, Oxford Road, ManchesterM13 9PL, United
Kingdom
| | - Conor Byrne
- Department
of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
- Photon
Science Institute, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
| | - Martin Quinn
- Department
of Physics and Astronomy, Manchester Center for Nonlinear Dynamics, University of Manchester, Oxford Road, ManchesterM13 9PL, United
Kingdom
| | - Alex Walton
- Department
of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
- Photon
Science Institute, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
| | - Anne Juel
- Department
of Physics and Astronomy, Manchester Center for Nonlinear Dynamics, University of Manchester, Oxford Road, ManchesterM13 9PL, United
Kingdom
| | - Robert A. W. Dryfe
- Department
of Chemistry, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
- Henry
Royce Institute, University of Manchester, Oxford Road, ManchesterM13 9PL, United Kingdom
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15
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Ma P, Liu Y, Tian Y, Ma L. Potential dependent friction: role of interfacial hydrated molecules. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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16
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Ober P, Hunger J, Kolbinger SH, Backus EHG, Bonn M. Ion Adsorption and Desorption at the CaF 2 -Water Interface Probed by Flow Experiments and Vibrational Spectroscopy. Angew Chem Int Ed Engl 2022; 61:e202207017. [PMID: 36006393 PMCID: PMC9828343 DOI: 10.1002/anie.202207017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Indexed: 01/12/2023]
Abstract
The dissolution of minerals in contact with water plays a crucial role in geochemistry. However, obtaining molecular insight into interfacial chemistry is challenging. Dissolution typically involves the release of ions from the surface, giving rise to a charged mineral surface. This charge affects the interfacial water arrangement, which can be investigated by surface-specific vibrational Sum Frequency Generation (v-SFG) spectroscopy. For the fluorite-water interface, recent spectroscopic studies concluded that fluoride adsorption/desorption determines the surface charge, which contrasts zeta potential measurements assigning this role to the calcium ion. By combining v-SFG spectroscopy and flow experiments with systematically suppressed dissolution, we uncover the interplay of dominant fluoride and weak calcium adsorption/desorption, resolving the controversy in the literature. We infer the calcium contribution to be orders of magnitude smaller, emphasizing the sensitivity of our approach.
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Affiliation(s)
- Patrick Ober
- Department of Molecular SpectroscopyMax Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
| | - Johannes Hunger
- Department of Molecular SpectroscopyMax Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
| | - Sophia H. Kolbinger
- Department of Molecular SpectroscopyMax Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
| | - Ellen H. G. Backus
- Department of Molecular SpectroscopyMax Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany,University of ViennaFaculty of ChemistryInstitute of Physical ChemistryWaehringer Strasse 421090ViennaAustria
| | - Mischa Bonn
- Department of Molecular SpectroscopyMax Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
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17
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Kooij S, van Rijn C, Ribe N, Bonn D. Self-charging of sprays. Sci Rep 2022; 12:19296. [PMID: 36369251 PMCID: PMC9650671 DOI: 10.1038/s41598-022-21943-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/06/2022] [Indexed: 11/13/2022] Open
Abstract
The charging of poorly conducting liquids due to flows is a well-known phenomenon, yet the precise charging mechanism is not fully understood. This is especially relevant for sprays, where the spray plume dynamics and maximum distance travelled of a spray dramatically changes for different levels of charging: charging of the droplets makes them repel, thereby preventing drop coalescence and altering the shape of the spray plume. As the charging depends on many factors including the flow and the interactions between the liquid and the nozzle, many models and scaling laws exist in the literature. In this work we focus on perhaps the simplest flow regime, laminar jets created by ultra short channels, and quantify the charging as a function of the different parameters. We present a simple model that collapses all the data for over 4 orders of magnitude difference in streaming currents for various nozzle sizes, flow velocities and surface treatments. We further show that the charging polarity can even be reversed by applying an oppositely charged coating to the nozzle, an important step for any application.
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18
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Hunger J, Schaefer J, Ober P, Seki T, Wang Y, Prädel L, Nagata Y, Bonn M, Bonthuis DJ, Backus EHG. Nature of Cations Critically Affects Water at the Negatively Charged Silica Interface. J Am Chem Soc 2022; 144:19726-19738. [PMID: 36273333 PMCID: PMC9634801 DOI: 10.1021/jacs.2c02777] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Understanding the collective behavior of ions at charged
surfaces
is of paramount importance for geological and electrochemical processes.
Ions screen the surface charge, and interfacial fields break the centro-symmetry
near the surface, which can be probed using second-order nonlinear
spectroscopies. The effect of electrolyte concentration on the nonlinear
optical response has been semi-quantitatively explained by mean-field
models based on the Poisson–Boltzmann equation. Yet, to explain
previously reported ion-specific effects on the spectroscopic response,
drastic ion-specific changes in the interfacial properties, including
surface acidities and dielectric permittivities, or strong ion adsorption/desorption
had to be invoked. Here, we use sum-frequency generation (SFG) spectroscopy
to probe the symmetry-breaking of water molecules at a charged silica
surface in contact with alkaline metal chloride solutions (LiCl, NaCl,
KCl, and CsCl) at various concentrations. We find that the water response
varies with the cation: the SFG response is markedly enhanced for
LiCl compared to CsCl. We show that within mean-field models, neither
specific ion–surface interactions nor a reduced dielectric
constant of water near the interface can account for the variation
of spectral intensities with cation nature. Molecular dynamics simulations
confirm that the decay of the electrochemical potential only weakly
depends on the salt type. Instead, the effect of different salts on
the optical response is indirect, through the reorganization of the
interfacial water: the salt-type-dependent alignment of water directly
at the interface can explain the observations.
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Affiliation(s)
- Johannes Hunger
- Department for Molecular Spectroscopy, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128Mainz, Germany
| | - Jan Schaefer
- Department for Molecular Spectroscopy, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128Mainz, Germany
| | - Patrick Ober
- Department for Molecular Spectroscopy, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128Mainz, Germany
| | - Takakazu Seki
- Department for Molecular Spectroscopy, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128Mainz, Germany
| | - Yongkang Wang
- Department for Molecular Spectroscopy, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128Mainz, Germany
| | - Leon Prädel
- Department for Molecular Spectroscopy, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128Mainz, Germany
| | - Yuki Nagata
- Department for Molecular Spectroscopy, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128Mainz, Germany
| | - Mischa Bonn
- Department for Molecular Spectroscopy, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128Mainz, Germany
| | - Douwe Jan Bonthuis
- Institute of Theoretical and Computational Physics, Graz University of Technology, Petersgasse16/II, 8010Graz, Austria
| | - Ellen H. G. Backus
- Department for Molecular Spectroscopy, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128Mainz, Germany
- Faculty of Chemistry, Institute of Physical Chemistry, University of Vienna, Währinger Strasse 42, 1090Vienna, Austria
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19
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Leroy P, Maineult A, Li S, Vinogradov J. The zeta potential of quartz. Surface complexation modelling to elucidate high salinity measurements. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Luo Y, Pang AP, Lu X. Liquid-Solid Interfaces under Dynamic Shear Flow: Recent Insights into the Interfacial Slip. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4473-4482. [PMID: 35377658 DOI: 10.1021/acs.langmuir.2c00037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The development of micro/nanofluidic techniques has recently revived interest in dynamic shear flow at liquid-solid interfaces. When the nature of the liquid-solid boundaries was revisited, the slip of the fluids relative to the solid wall was predicted theoretically and confirmed experimentally. This indicates that the molecular-level structures of the liquid-solid interfaces will be influenced by the liquid flow over certain temporal and spatial criteria. However, the fluid flow at the boundary layer still cannot be precisely predicted and effectively controlled, somehow limiting its practical applications. Here, we summarize the recent advances for the microscopic structures at the liquid-solid interfaces upon shear flow. Special attention was given to a second-order nonlinear optical technique, sum frequency generation vibrational spectroscopy, which is a powerful tool for exploring the molecular-level structures and structural dynamics at the liquid-solid interfaces and offering new insights into the molecular mechanisms of the fluid slip at the interfaces. Moreover, we discuss the possible approaches for controlling the interfacial slip at the molecular level and highlight the current challenges and opportunities. Although the theoretical framework of the slip at the liquid-solid interfaces is still incomplete, we hope that this Perspective will complement and enhance our understanding of various interfacial properties and phenomena with respect to practical non-equilibrium dynamic processes happening at the interfaces.
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Affiliation(s)
- Yongsheng Luo
- The State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, Jiangsu, P. R. China
| | - Ai-Ping Pang
- The State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, Jiangsu, P. R. China
| | - Xiaolin Lu
- The State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, Jiangsu, P. R. China
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21
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Enderlein J, Sakhapov D, Gregor I, Croci M, Karedla N. Modeling charge separation in charged nanochannels for single-molecule electrometry. J Chem Phys 2022; 156:105104. [DOI: 10.1063/5.0074732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We model the transport of electrically charged solute molecules by a laminar flow within a nanoslit microfluidic channel with electrostatic surface potential. We derive the governing convection–diffusion equation, solve it numerically, and compare it with a Taylor–Aris-like approximation, which gives excellent results for small Péclet numbers. We discuss our results in light of designing an assay that can measure simultaneously the hydrodynamic size and electric charge of single molecules by tracking their motion in such nanoslit channels with electrostatic surface potential.
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Affiliation(s)
- Jörg Enderlein
- III. Institute of Physics–Biophysics, Georg August University, 37077 Göttingen, Germany
- Cluster of Excellence “Multiscale Bioimaging: From Molecular Machines to Networks of Excitable Cells” (MBExC), Georg August University, 37077 Göttingen, Germany
| | - Damir Sakhapov
- III. Institute of Physics–Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Ingo Gregor
- III. Institute of Physics–Biophysics, Georg August University, 37077 Göttingen, Germany
| | - Matteo Croci
- Mathematical Institute, University of Oxford, Oxford OX2 6GG, United Kingdom
| | - Narain Karedla
- The Rosalind Franklin Institute, Harwell Campus, Didcot OX11 0FA, United Kingdom
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22
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Zhu Q, Wallentine SK, Deng GH, Rebstock JA, Baker LR. The Solvation-Induced Onsager Reaction Field Rather than the Double-Layer Field Controls CO 2 Reduction on Gold. JACS AU 2022; 2:472-482. [PMID: 35252996 PMCID: PMC8889607 DOI: 10.1021/jacsau.1c00512] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Indexed: 06/14/2023]
Abstract
The selectivity and activity of the carbon dioxide reduction (CO2R) reaction are sensitive functions of the electrolyte cation. By measuring the vibrational Stark shift of in situ-generated CO on Au in the presence of alkali cations, we quantify the total electric field present at catalytic active sites and deconvolute this field into contributions from (1) the electrochemical Stern layer and (2) the Onsager (or solvation-induced) reaction field. Contrary to recent theoretical reports, the CO2R kinetics does not depend on the Stern field but instead is closely correlated with the strength of the Onsager reaction field. These results show that in the presence of adsorbed (bent) CO2, the Onsager field greatly exceeds the Stern field and is primarily responsible for CO2 activation. Additional measurements of the cation-dependent water spectra using vibrational sum frequency generation spectroscopy show that interfacial solvation strongly influences the CO2R activity. These combined results confirm that the cation-dependent interfacial water structure and its associated electric field must be explicitly considered for accurate understanding of CO2R reaction kinetics.
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23
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Luo Y, Pang AP, Zhu P, Wang D, Lu X. Demonstrating the Interfacial Polymer Thermal Transition from Coil-to-Globule to Coil-to-Stretch under Shear Flow Using SFG and MD Simulation. J Phys Chem Lett 2022; 13:1617-1627. [PMID: 35142518 DOI: 10.1021/acs.jpclett.1c03866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Revealing interfacial shear-induced structural responsiveness has long been an important topic in that most fluids in nature and human life are in motion and cause interesting boundary phenomena. It is amazing how the polymer chain conformation or local structural features at a boundary change under the effective shear condition. In this study, microfluidic-assisted sum frequency generation (SFG) vibrational spectroscopy and all-atom molecular dynamics (MD) simulation are combined to reveal that the shear flow can effectively block the so-called thermal coil-to-globule transition of the poly(N-isopropylacrylamide) (PNIPAM) brushes on the solid substrate, and the normal coil-to-globule transition transfers to a coil-to-stretch one under shear flow with increasing ambient temperature. Such findings are attributed to the balance between the shear flow and the molecular interaction with respect to the polymer chains and adjacent water molecules, thus demonstrating the significant effect of the shear flow on the structural and dynamic behaviors of the polymer chains at the boundaries from the molecular level.
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Affiliation(s)
- Yongsheng Luo
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, Jiangsu Province, P. R. China
| | - Ai-Ping Pang
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, Jiangsu Province, P. R. China
| | - Peizhi Zhu
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225009, Jiangsu Province, P. R. China
| | - Dayang Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, Jilin Province, P. R. China
| | - Xiaolin Lu
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, Jiangsu Province, P. R. China
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24
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Sthoer A, Adams EM, Sengupta S, Corkery RW, Allen HC, Tyrode EC. La 3+ and Y 3+ interactions with the carboxylic acid moiety at the liquid/vapor interface: Identification of binding complexes, charge reversal, and detection limits. J Colloid Interface Sci 2022; 608:2169-2180. [PMID: 34798383 DOI: 10.1016/j.jcis.2021.10.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/30/2021] [Accepted: 10/11/2021] [Indexed: 10/20/2022]
Abstract
Specific interactions of yttrium and lanthanum ions with a fatty acid Langmuir monolayer were investigated using vibrational sum frequency spectroscopy. The trivalent ions were shown to interact with the charged form of the carboxylic acid group from nanomolar concentrations (<300 nM). Analysis of the spectral features from both the symmetric and the asymmetric carboxylate modes reveals the presence of at least three distinct coordination structures linked to specific binding configurations. Although the same species were identified for both La3+ and Y3+, they display a different concentration dependence, highlighting the ion-specificity of the interaction. From the analysis of the response of interfacial water molecules, the reversal of the surface charge, as well as the formation of yttrium hydroxide complexes, were detected upon increasing the amount of salt in solution. The binding interaction and kinetics of absorption are sensitive to the solution pH, showing a distinct ion speciation in the interfacial region when compared to the bulk. Changing the subphase pH or adding a monovalent background electrolyte that promotes deprotonation of the carboxylic acid headgroup could further improve the detection limit of La3+ and Y3+ to concentrations < 100 nM. These findings demonstrate that nM concentrations of trace metals contaminants, typically found on monovalent salts, can significantly influence the binding structure and kinetics in Langmuir monolayers.
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Affiliation(s)
- Adrien Sthoer
- Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden
| | - Ellen M Adams
- Department of Chemistry & Biochemistry, The Ohio State University, Columbus, OH 43210, USA; Department of Physical Chemistry II, Ruhr-Universität Bochum, 44801 Bochum, Germany(1)
| | - Sanghamitra Sengupta
- Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden; Ultrafast Spectroscopy, AMOLF, 1098 XG Science Park, Amsterdam, The Netherlands(1)
| | - Robert W Corkery
- Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden; Department of Applied Mathematics, Research School of Physics and Engineering, Australian National University, Canberra, ACT0200, Australia
| | - Heather C Allen
- Department of Chemistry & Biochemistry, The Ohio State University, Columbus, OH 43210, USA
| | - Eric C Tyrode
- Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden.
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25
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Döpke MF, Westerbaan van der Meij F, Coasne B, Hartkamp R. Surface Protolysis and Its Kinetics Impact the Electrical Double Layer. PHYSICAL REVIEW LETTERS 2022; 128:056001. [PMID: 35179914 DOI: 10.1103/physrevlett.128.056001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/08/2021] [Accepted: 01/05/2022] [Indexed: 06/14/2023]
Abstract
Surface conductivity in the electrical double layer (EDL) is known to be affected by proton hopping and diffusion at solid-liquid interfaces. Yet, the role of surface protolysis and its kinetics on the thermodynamic and transport properties of the EDL are usually ignored as physical models consider static surfaces. Here, using a novel molecular dynamics method mimicking surface protolysis, we unveil the impact of such chemical events on the system's response. Protolysis is found to strongly affect the EDL and electrokinetic aspects with major changes in ζ potential and electro-osmotic flow.
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Affiliation(s)
- Max F Döpke
- Process & Energy Department, Delft University of Technology, Leeghwaterstraat 39, 2628 CB Delft, Netherlands
| | | | - Benoit Coasne
- Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - Remco Hartkamp
- Process & Energy Department, Delft University of Technology, Leeghwaterstraat 39, 2628 CB Delft, Netherlands
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26
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Comtet J, Rayabharam A, Glushkov E, Zhang M, Avsar A, Watanabe K, Taniguchi T, Aluru NR, Radenovic A. Anomalous interfacial dynamics of single proton charges in binary aqueous solutions. SCIENCE ADVANCES 2021; 7:eabg8568. [PMID: 34586851 PMCID: PMC8480921 DOI: 10.1126/sciadv.abg8568] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 08/06/2021] [Indexed: 05/25/2023]
Abstract
Our understanding of the dynamics of charge transfer between solid surfaces and liquid electrolytes has been hampered by the difficulties in obtaining interface, charge, and solvent-specific information at both high spatial and temporal resolution. Here, we measure at the single charge scale the dynamics of protons at the interface between an hBN crystal and binary mixtures of water and organic amphiphilic solvents (alcohols and acetone), evidencing a marked influence of solvation on interfacial dynamics. Applying single-molecule localization microscopy to emissive crystal defects, we observe correlated activation between adjacent ionizable surface defects, mediated by the transport of single excess protons along the solid/liquid interface. Solvent content has a nontrivial effect on interfacial dynamics, leading at intermediate water fraction to an increased surface diffusivity, as well as an increased affinity of the proton charges to the solid surface. Our measurements evidence the notable role of solvation on interfacial proton charge transport.
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Affiliation(s)
- Jean Comtet
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
- Laboratory of Soft Matter Science and Engineering, ESPCI Paris, PSL University, Sorbonne Université, CNRS, F-75005 Paris, France
| | - Archith Rayabharam
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Champaign, IL, USA
| | - Evgenii Glushkov
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Miao Zhang
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Ahmet Avsar
- School of Mathematics, Statistics and Physics, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Kenji Watanabe
- National Institute for Materials Science, Tsukuba, Japan
| | | | - Narayana R. Aluru
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Champaign, IL, USA
| | - Aleksandra Radenovic
- Laboratory of Nanoscale Biology, Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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27
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Heberling F, Klačić T, Raiteri P, Gale JD, Eng PJ, Stubbs JE, Gil-Díaz T, Begović T, Lützenkirchen J. Structure and Surface Complexation at the Calcite(104)-Water Interface. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:12403-12413. [PMID: 34478280 DOI: 10.1021/acs.est.1c03578] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Calcite is the most stable polymorph of calcium carbonate (CaCO3) under ambient conditions and is ubiquitous in natural systems. It plays a major role in controlling pH in environmental settings. Electrostatic phenomena at the calcite-water interface and the surface reactivity of calcite in general have important environmental implications. They may strongly impact nutrient and contaminant mobility in soils and other subsurface environments, they control oil recovery from limestone reservoirs, and they may impact the safety of nuclear waste disposal sites. Besides the environmental relevance, the topic is significant for industrial applications and cultural heritage preservation. In this study, the structure of the calcite(104)-water interface is investigated on the basis of a new extensive set of crystal truncation rod data. The results agree with recently reported structures and resolve previous ambiguities with respect to the coordination sphere of surface Ca ions. These structural features are introduced into an electrostatic three-plane surface complexation model, describing ion adsorption and charging at the calcite-water interface. Inner surface potential data for calcite, as measured with a calcite single-crystal electrode, are used as constraints for the model in addition to zeta potential data. Ion adsorption parameters are compared with molecular dynamics simulations. All model parameters, including protonation constants, ion-binding parameters, and Helmholtz capacitances, are within physically and chemically plausible ranges. A PhreeqC version of the model is presented, which we hope will foster application of the model in environmental studies.
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Affiliation(s)
- Frank Heberling
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Tin Klačić
- Division of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, HR-10000 Zagreb, Croatia
| | - Paolo Raiteri
- Curtin Institute for Computation/The Institute for Geoscience Research, School of Molecular and Life Sciences, Curtin University, P.O. Box U1987 Perth, WA 6845, Australia
| | - Julian D Gale
- Curtin Institute for Computation/The Institute for Geoscience Research, School of Molecular and Life Sciences, Curtin University, P.O. Box U1987 Perth, WA 6845, Australia
| | - Peter J Eng
- Center for Advanced Radiation Sources, The University of Chicago, 5734 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Joanne E Stubbs
- Center for Advanced Radiation Sources, The University of Chicago, 5734 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Teba Gil-Díaz
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany
- Institute of Geosciences, Friedrich-Schiller-Universität Jena, Burgweg 11, 07749 Jena, Germany
| | - Tajana Begović
- Division of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, HR-10000 Zagreb, Croatia
| | - Johannes Lützenkirchen
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany
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28
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Wan Z, Azam MS, Wyatt S, Ramsay K, Korner JL, Elvira KS, Padmawar R, Varela D, Hore DK. Algae Adhesion onto Silicone is Sensitive to Environment-Induced Surface Restructuring. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9597-9604. [PMID: 34328000 DOI: 10.1021/acs.langmuir.1c01493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Resistance to algae contamination is an important characteristic of insulators used in overhead power distribution in coastal environments. It is therefore important to understand the parameters governing algae adhesion onto polymer insulator materials such as silicone. Flow cell-based shear experiments were conducted in order to characterize the adhesion strength of algae onto polydimethylsiloxane surfaces, comparing fresh polymer substrates with those that have been soaked in water and saline solutions for 1 month. Both freshwater algae and seawater species could withstand considerably less drag force and were therefore more easily removed when the polymer was soaked in salt water. The polymer surface was found to be unaltered in terms of its roughness, contact angle, and lack of water uptake; no macroscopic surface characterization was therefore able to account for the differences in cell adhesion strength resulting from the soaking treatment. Surface-specific nonlinear vibrational spectroscopy, however, revealed subtle differences in the orientation of surface methyl groups that resulted from the water and saline exposure.
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Affiliation(s)
- Zhijing Wan
- Department of Chemistry, University of Victoria, Victoria V8W 3V6, British Columbia, Canada
| | - Md Shafiul Azam
- Department of Chemistry, University of Victoria, Victoria V8W 3V6, British Columbia, Canada
| | - Shea Wyatt
- Department of Biology, University of Victoria, Victoria V8W 2Y2, British Columbia, Canada
| | - Kaitlyn Ramsay
- Department of Chemistry, University of Victoria, Victoria V8W 3V6, British Columbia, Canada
| | - Jaime L Korner
- Department of Chemistry, University of Victoria, Victoria V8W 3V6, British Columbia, Canada
| | - Katherine S Elvira
- Department of Chemistry, University of Victoria, Victoria V8W 3V6, British Columbia, Canada
| | - Rajkumar Padmawar
- ASAsoft (Canada) Inc., 179-2945 Jacklin Road Suite 221, Victoria V9B 6J9, British Columbia, Canada
| | - Diana Varela
- Department of Biology, University of Victoria, Victoria V8W 2Y2, British Columbia, Canada
- School of Earth and Ocean Sciences, University of Victoria, Victoria V8W 2Y2, British Columbia, Canada
| | - Dennis K Hore
- Department of Chemistry, University of Victoria, Victoria V8W 3V6, British Columbia, Canada
- Department of Computer Science, University of Victoria, Victoria V8W 3P6, British Columbia, Canada
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29
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Uematsu Y. Electrification of water interface. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33. [PMID: 34280896 DOI: 10.1088/1361-648x/ac15d5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 07/19/2021] [Indexed: 05/04/2023]
Abstract
The surface charge of a water interface determines many fundamental processes in physical chemistry and interface science, and it has been intensively studied for over a hundred years. We summarize experimental methods to characterize the surface charge densities developed so far: electrokinetics, double-layer force measurements, potentiometric titration, surface-sensitive nonlinear spectroscopy, and surface-sensitive mass spectrometry. Then, we elucidate physical ion adsorption and chemical electrification as examples of electrification mechanisms. In the end, novel effects on surface electrification are discussed in detail. We believe that this clear overview of state of the art in a charged water interface will surely help the fundamental progress of physics and chemistry at interfaces in the future.
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Affiliation(s)
- Yuki Uematsu
- Department of Physics, Kyushu University, Fukuoka 819-0395, Japan
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30
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Lin L, Chowdhury AU, Ma YZ, Sacci RL, Katsaras J, Hong K, Collier CP, Carrillo JMY, Doughty B. Ion Pairing Mediates Molecular Organization Across Liquid/Liquid Interfaces. ACS APPLIED MATERIALS & INTERFACES 2021; 13:33734-33743. [PMID: 34235915 DOI: 10.1021/acsami.1c09763] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Liquid/liquid interfaces play a central role in scientific fields ranging from nanomaterial synthesis and soft matter electronics to nuclear waste remediation and chemical separations. This diversity of functions arises from an interface's ability to respond to changing conditions in its neighboring bulk phases. Understanding what drives this interfacial flexibility can provide novel avenues for designing new functional interfaces. However, limiting this progress is an inadequate understanding of the subtle intermolecular and interphase interactions taking place at the molecular level. Here, we use surface-specific vibrational sum frequency generation spectroscopy combined with atomistic molecular dynamics simulations to investigate the self-assembly and structure of model ionic oligomers consisting of an oligodimethylsiloxane (ODMS) tail covalently attached to a positively charged methyl imidazolium (MIM+) head group at buried oil/aqueous interfaces. We show how the presence of seemingly innocuous salts can impart dramatic changes to the ODMS tail conformations in the oil phase via specific ion effects and ion-pairing interactions taking place in the aqueous phase. These specific ion interactions are shown to drive enhanced amphiphile adsorption, induce morphological changes, and disrupt emergent hydrogen-bonding structures at the interface. Tuning these interactions allows for independent control over the oligomer structure in the oil phase versus interfacial population changes and represents key mechanistic insight that is needed to control chemical reactions at liquid/liquid interfaces.
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Affiliation(s)
- Lu Lin
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Azhad U Chowdhury
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Ying-Zhong Ma
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Robert L Sacci
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - John Katsaras
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Shull Wollan Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Kunlun Hong
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - C Patrick Collier
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jan-Michael Y Carrillo
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Benjamin Doughty
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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31
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Barry E, Burns R, Chen W, De Hoe GX, De Oca JMM, de Pablo JJ, Dombrowski J, Elam JW, Felts AM, Galli G, Hack J, He Q, He X, Hoenig E, Iscen A, Kash B, Kung HH, Lewis NHC, Liu C, Ma X, Mane A, Martinson ABF, Mulfort KL, Murphy J, Mølhave K, Nealey P, Qiao Y, Rozyyev V, Schatz GC, Sibener SJ, Talapin D, Tiede DM, Tirrell MV, Tokmakoff A, Voth GA, Wang Z, Ye Z, Yesibolati M, Zaluzec NJ, Darling SB. Advanced Materials for Energy-Water Systems: The Central Role of Water/Solid Interfaces in Adsorption, Reactivity, and Transport. Chem Rev 2021; 121:9450-9501. [PMID: 34213328 DOI: 10.1021/acs.chemrev.1c00069] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The structure, chemistry, and charge of interfaces between materials and aqueous fluids play a central role in determining properties and performance of numerous water systems. Sensors, membranes, sorbents, and heterogeneous catalysts almost uniformly rely on specific interactions between their surfaces and components dissolved or suspended in the water-and often the water molecules themselves-to detect and mitigate contaminants. Deleterious processes in these systems such as fouling, scaling (inorganic deposits), and corrosion are also governed by interfacial phenomena. Despite the importance of these interfaces, much remains to be learned about their multiscale interactions. Developing a deeper understanding of the molecular- and mesoscale phenomena at water/solid interfaces will be essential to driving innovation to address grand challenges in supplying sufficient fit-for-purpose water in the future. In this Review, we examine the current state of knowledge surrounding adsorption, reactivity, and transport in several key classes of water/solid interfaces, drawing on a synergistic combination of theory, simulation, and experiments, and provide an outlook for prioritizing strategic research directions.
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Affiliation(s)
- Edward Barry
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Applied Materials Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Center for Molecular Engineering, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - Raelyn Burns
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Applied Materials Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - Wei Chen
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Center for Molecular Engineering, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Guilhem X De Hoe
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Center for Molecular Engineering, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Joan Manuel Montes De Oca
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Juan J de Pablo
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - James Dombrowski
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 United States
| | - Jeffrey W Elam
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Applied Materials Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Center for Molecular Engineering, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - Alanna M Felts
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 United States
| | - Giulia Galli
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - John Hack
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Qiming He
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Center for Molecular Engineering, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Xiang He
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - Eli Hoenig
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Aysenur Iscen
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 United States
| | - Benjamin Kash
- Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Harold H Kung
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 United States
| | - Nicholas H C Lewis
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Chong Liu
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Xinyou Ma
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Anil Mane
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Applied Materials Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - Alex B F Martinson
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Center for Molecular Engineering, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - Karen L Mulfort
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - Julia Murphy
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Kristian Mølhave
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Technical University of Denmark, Anker Engelunds Vej 1 Bygning 101A, Kgs. Lyngby, Lyngby, Hovedstaden 2800, DK Denmark
| | - Paul Nealey
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Yijun Qiao
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Center for Molecular Engineering, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - Vepa Rozyyev
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Applied Materials Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - George C Schatz
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 United States
| | - Steven J Sibener
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Dmitri Talapin
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - David M Tiede
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - Matthew V Tirrell
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Center for Molecular Engineering, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Andrei Tokmakoff
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Gregory A Voth
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Zhongyang Wang
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Zifan Ye
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
| | - Murat Yesibolati
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Technical University of Denmark, Anker Engelunds Vej 1 Bygning 101A, Kgs. Lyngby, Lyngby, Hovedstaden 2800, DK Denmark
| | - Nestor J Zaluzec
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Photon Sciences Directorate, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States
| | - Seth B Darling
- Advanced Materials for Energy-Water Systems (AMEWS) Energy Frontier Research Center (EFRC), Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Center for Molecular Engineering, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439 United States.,Pritzker School of Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 United States
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32
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Liquid flow reversibly creates a macroscopic surface charge gradient. Nat Commun 2021; 12:4102. [PMID: 34215740 PMCID: PMC8253779 DOI: 10.1038/s41467-021-24270-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 06/09/2021] [Indexed: 12/04/2022] Open
Abstract
The charging and dissolution of mineral surfaces in contact with flowing liquids are ubiquitous in nature, as most minerals in water spontaneously acquire charge and dissolve. Mineral dissolution has been studied extensively under equilibrium conditions, even though non-equilibrium phenomena are pervasive and substantially affect the mineral-water interface. Here we demonstrate using interface-specific spectroscopy that liquid flow along a calcium fluoride surface creates a reversible spatial charge gradient, with decreasing surface charge downstream of the flow. The surface charge gradient can be quantitatively accounted for by a reaction-diffusion-advection model, which reveals that the charge gradient results from a delicate interplay between diffusion, advection, dissolution, and desorption/adsorption. The underlying mechanism is expected to be valid for a wide variety of systems, including groundwater flows in nature and microfluidic systems. Reactions at the interface between mineral surfaces and flowing liquids are ubiquitous in nature. Here the authors explore, using surface-specific sum frequency generation spectroscopy and numeric calculations, how the liquid flow affects the charging and dissolution rates leading to flow-dependent charge gradients along the surface.
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33
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Abstract
The ubiquity of aqueous solutions in contact with charged surfaces and the realization that the molecular-level details of water-surface interactions often determine interfacial functions and properties relevant in many natural processes have led to intensive research. Even so, many open questions remain regarding the molecular picture of the interfacial organization and preferential alignment of water molecules, as well as the structure of water molecules and ion distributions at different charged interfaces. While water, solutes and charge are present in each of these systems, the substrate can range from living tissues to metals. This diversity in substrates has led to different communities considering each of these types of aqueous interface. In this Review, by considering water in contact with metals, oxides and biomembranes, we show the essential similarity of these disparate systems. While in each case the classical mean-field theories can explain many macroscopic and mesoscopic observations, it soon becomes apparent that such theories fail to explain phenomena for which molecular properties are relevant, such as interfacial chemical conversion. We highlight the current knowledge and limitations in our understanding and end with a view towards future opportunities in the field.
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34
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Backus EHG, Schaefer J, Bonn M. Probing the Mineral-Water Interface with Nonlinear Optical Spectroscopy. Angew Chem Int Ed Engl 2021; 60:10482-10501. [PMID: 32558984 PMCID: PMC8247323 DOI: 10.1002/anie.202003085] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 05/18/2020] [Indexed: 12/21/2022]
Abstract
The interaction between minerals and water is manifold and complex: the mineral surface can be (de)protonated by water, thereby changing its charge; mineral ions dissolved into the aqueous phase screen the surface charges. Both factors affect the interaction with water. Intrinsically molecular-level processes and interactions govern macroscopic phenomena, such as flow-induced dissolution, wetting, and charging. This realization is increasingly prompting molecular-level studies of mineral-water interfaces. Here, we provide an overview of recent developments in surface-specific nonlinear spectroscopy techniques such as sum frequency and second harmonic generation (SFG/SHG), which can provide information about the molecular arrangement of the first few layers of water molecules at the mineral surface. The results illustrate the subtleties of both chemical and physical interactions between water and the mineral as well as the critical role of mineral dissolution and other ions in solution for determining those interactions.
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Affiliation(s)
- Ellen H. G. Backus
- Max Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
- Department of Physical ChemistryUniversity of ViennaWähringer Strasse 421090ViennaAustria
| | - Jan Schaefer
- Max Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
| | - Mischa Bonn
- Max Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany
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35
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Backus EHG, Schaefer J, Bonn M. Untersuchung der Mineral‐Wasser‐Grenzschicht mit nicht‐linearer optischer Spektroskopie. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202003085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ellen H. G. Backus
- Max-Planck-Institut für Polymerforschung Ackermannweg 10 55128 Mainz Deutschland
- Institut für Physikalische Chemie Universität Wien Währinger Straße 42 1090 Wien Österreich
| | - Jan Schaefer
- Max-Planck-Institut für Polymerforschung Ackermannweg 10 55128 Mainz Deutschland
| | - Mischa Bonn
- Max-Planck-Institut für Polymerforschung Ackermannweg 10 55128 Mainz Deutschland
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36
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Liu Y, Zhang D, Ren B, Gong X, Xu L, Feng ZQ, Chang Y, He Y, Zheng J. Molecular simulations and understanding of antifouling zwitterionic polymer brushes. J Mater Chem B 2021; 8:3814-3828. [PMID: 32227061 DOI: 10.1039/d0tb00520g] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Zwitterionic materials are an important class of antifouling biomaterials for various applications. Despite such desirable antifouling properties, molecular-level understanding of the structure-property relationship associated with surface chemistry/topology/hydration and antifouling performance still remains to be elucidated. In this work, we computationally studied the packing structure, surface hydration, and antifouling property of three zwitterionic polymer brushes of poly(carboxybetaine methacrylate) (pCBMA), poly(sulfobetaine methacrylate) (pSBMA), and poly((2-(methacryloyloxy)ethyl)phosporylcoline) (pMPC) brushes and a hydrophilic PEG brush using a combination of molecular mechanics (MM), Monte Carlo (MC), molecular dynamics (MD), and steered MD (SMD) simulations. We for the first time determined the optimal packing structures of all polymer brushes from a wide variety of unit cells and chain orientations in a complex energy landscape. Under the optimal packing structures, MD simulations were further conducted to study the structure, dynamics, and orientation of water molecules and protein adsorption on the four polymer brushes, while SMD simulations to study the surface resistance of the polymer brushes to a protein. The collective results consistently revealed that the three zwitterionic brushes exhibited stronger interactions with water molecules and higher surface resistance to a protein than the PEG brush. It was concluded that both the carbon space length between zwitterionic groups and the nature of the anionic groups have a distinct effect on the antifouling performance, leading to the following antifouling ranking of pCBMA > pMPC > pSBMA. This work hopefully provides some structural insights into the design of new antifouling materials beyond traditional PEG-based antifouling materials.
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Affiliation(s)
- Yonglan Liu
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Ohio 44325, USA.
| | - Dong Zhang
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Ohio 44325, USA.
| | - Baiping Ren
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Ohio 44325, USA.
| | - Xiong Gong
- Department of Polymer Engineering, The University of Akron, Ohio 44325, USA
| | - Lijian Xu
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, P. R. China
| | - Zhang-Qi Feng
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Yung Chang
- Department of Chemical Engineering and R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 320, Taiwan
| | - Yi He
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Jie Zheng
- Department of Chemical, Biomolecular, and Corrosion Engineering, The University of Akron, Ohio 44325, USA. and Department of Polymer Engineering, The University of Akron, Ohio 44325, USA
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37
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Döpke MF, Hartkamp R. The importance of specifically adsorbed ions for electrokinetic phenomena: Bridging the gap between experiments and MD simulations. J Chem Phys 2021; 154:094701. [DOI: 10.1063/5.0038161] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Max F. Döpke
- Process & Energy Department, Delft University of Technology, Leeghwaterstraat 39, 2628 CB Delft, The Netherlands
| | - Remco Hartkamp
- Process & Energy Department, Delft University of Technology, Leeghwaterstraat 39, 2628 CB Delft, The Netherlands
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38
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Peng M, Duignan TT, Nguyen CV, Nguyen AV. From Surface Tension to Molecular Distribution: Modeling Surfactant Adsorption at the Air-Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:2237-2255. [PMID: 33559472 DOI: 10.1021/acs.langmuir.0c03162] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Surfactants are centrally important in many scientific and engineering fields and are used for many purposes such as foaming agents and detergents. However, many challenges remain in providing a comprehensive understanding of their behavior. Here, we provide a brief historical overview of the study of surfactant adsorption at the air-water interface, followed by a discussion of some recent advances in this area from our group. The main focus is on incorporating an accurate description of the adsorption layer thickness of surfactant at the air-water interface. Surfactants have a wide distribution at the air-water interface, which can have a significant effect on important properties such as the surface excess, surface tension, and surface potential. We have developed a modified Poisson-Boltzmann (MPB) model to describe this effect, which we outline here. We also address the remaining challenges and future research directions in this area. We believe that experimental techniques, modeling, and simulation should be combined to form a holistic picture of surfactant adsorption at the air-water interface.
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Affiliation(s)
- Mengsu Peng
- School of Chemical Engineering, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Timothy T Duignan
- School of Chemical Engineering, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Cuong V Nguyen
- School of Chemical Engineering, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Anh V Nguyen
- School of Chemical Engineering, University of Queensland, Brisbane, Queensland 4072, Australia
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39
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Josell D, Moffat TP. Additives for Superconformal Gold Feature Filling. JOURNAL OF THE ELECTROCHEMICAL SOCIETY 2021; 168:10.1149/1945-7111/abfcd7. [PMID: 36937556 PMCID: PMC10020952 DOI: 10.1149/1945-7111/abfcd7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
An overview of the effect of additives on Au electrodeposition from Na3Au(SO3)2 based electrolytes is presented with an emphasis on filling of fully metallized recessed surface features such as trenches and vias. The impact of heavy metals additives Tl+, Pb2+, and Bi3+ is reviewed and accompanied by a brief survey of the effects of Sb3+, Te4+, SeCN-, 3-mercapto-1-propanesulfonic acid (MPS) and polyethyleneimine (PEI) additions. The addition of Tl+, Pb2+, Bi3+ or Sb3+ accelerates the kinetics of Au(SO3)2 3- reduction to Au, as manifest in hysteretic voltammetry and rising chronoamperometric transients, and yields bright specular deposits. Gold deposition with Pb2+ addition exhibits superconformal filling in sub-micrometer trenches while Bi3+ addition induces a more extreme bottom-up filling, but Tl+ and Sb3+ additions yield essentially conformal deposition for the conditions examined. Modest acceleration and hysteresis observed with Te4+ addition reflect roughening due to limited nucleation, 3D growth and delayed coalescence, rather than catalysis, and are associated with conformal feature filling. Unlike the other additives, SeCN-, MPS and PEI inhibit the deposition kinetics. Breakdown of suppression during deposition in micrometer size trenches is biased toward recessed surfaces where the flux of suppressor is constrained, yielding localized deposition and superconformal filling.
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Affiliation(s)
- D Josell
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD
| | - T P Moffat
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD
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40
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Jarmolińska S, Feliczak-Guzik A, Nowak I. Synthesis, Characterization and Use of Mesoporous Silicas of the Following Types SBA-1, SBA-2, HMM-1 and HMM-2. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4385. [PMID: 33019709 PMCID: PMC7579092 DOI: 10.3390/ma13194385] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/25/2020] [Accepted: 09/29/2020] [Indexed: 01/09/2023]
Abstract
Mesoporous silicas have enjoyed great interest among scientists practically from the moment of their discovery thanks to their unique attractive properties. Many types of mesoporous silicas have been described in literature, the most thoroughly MCM-41 and SBA-15 ones. The focus of this review are the methods of syntheses, characterization and use of mesoporous silicas from SBA (Santa Barbara Amorphous) and HMM (Hybrid Mesoporous Materials) groups. The first group is represented by (i) SBA-1 of three-dimensional cubic structure and Pm3n symmetry and (ii) SBA-2 of three-dimensional combined hexagonal and cubic structures and P63/mmc symmetry. The HMM group is represented by (i) HMM-1 of two-dimensional hexagonal structure and p6mm symmetry and (ii) HMM-2 of three-dimensional structure and P63/mmc symmetry. The paper provides comprehensive information on the above-mentioned silica materials available so far, also including the data for the silicas modified with metal ions or/and organic functional groups and examples of the materials applications.
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Affiliation(s)
| | | | - Izabela Nowak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland; (S.J.); (A.F.-G.)
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41
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Saha S, Roy S, Mathi P, Mondal JA. Adsorption of Iodine Species (I 3-, I -, and IO 3-) at the Nuclear Paint Monolayer-Water Interface and Its Relevance to a Nuclear Accident Scenario. J Phys Chem A 2020; 124:6726-6734. [PMID: 32786661 DOI: 10.1021/acs.jpca.0c04893] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Following a nuclear accident, radioactive iodine causes great concern to public health and safety. Organic iodide, because of its ability to escape reactor containment building and high environmental mobility, constitutes a predominant fraction of airborne radioiodine at places far away from the accident site. As the iodine released from a reactor core is inorganic iodine, it is vital to understand the mechanism of organic iodide formation inside reactor containment. In this context, we investigated the surface prevalence and adsorption of various inorganic iodines, I-, I3-, and IO3-, at a nuclear paint (used in nuclear installations) monolayer-water interface, mimicking the painted inner walls of an accident-affected containment building that are exposed to the iodine-containing condensed water layer. Vibrational sum frequency generation (VSFG) measurements in the OH and CH stretch regions reveal that the paint-water interface changes its charge characteristics with the pH of the water that affects the degree of interaction with the iodine species. At the acidic condition (bulk pH < 7), the paint becomes positively charged and strongly adsorbs the negatively charged iodine species dissolved in the aqueous phase, whereas at the alkaline condition (bulk pH > 9.5), the paint becomes net neutral and weakly interacts with the iodine species. These interactions change the conformation of the paint such that its hydrophobic alkyl groups orient increasingly away from the aqueous phase. The order of adsorption increases as IO3- < I- < I3- for the different iodine species studied.
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Affiliation(s)
- Subhamoy Saha
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Homi Bhabha National Institute, Trombay, Mumbai 400085, India
| | - Subhadip Roy
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Homi Bhabha National Institute, Trombay, Mumbai 400085, India
| | - P Mathi
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Homi Bhabha National Institute, Trombay, Mumbai 400085, India
| | - Jahur A Mondal
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Homi Bhabha National Institute, Trombay, Mumbai 400085, India
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42
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Ravnik M, Everts JC. Topological-Defect-Induced Surface Charge Heterogeneities in Nematic Electrolytes. PHYSICAL REVIEW LETTERS 2020; 125:037801. [PMID: 32745396 DOI: 10.1103/physrevlett.125.037801] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/16/2020] [Indexed: 06/11/2023]
Abstract
We show that topological defects in an ion-doped nematic liquid crystal can be used to manipulate the surface charge distribution on chemically homogeneous, charge-regulating external surfaces, using a minimal theoretical model. In particular, the location and type of the defect encodes the precise distribution of surface charges and the effect is enhanced when the liquid crystal is flexoelectric. We demonstrate the principle for patterned surfaces and charged colloidal spheres. More generally, our results indicate an interesting approach to control surface charges on external surfaces without changing the surface chemistry.
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Affiliation(s)
- Miha Ravnik
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia
- Department of Condensed Matter Physics, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
| | - Jeffrey C Everts
- Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia
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43
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Xiong H, Devegowda D, Huang L. Oil–water
transport in
clay‐hosted
nanopores: Effects of
long‐range
electrostatic forces. AIChE J 2020. [DOI: 10.1002/aic.16276] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Hao Xiong
- Mewbourne School of Petroleum and Geological EngineeringThe University of Oklahoma Norman Oklahoma USA
| | - Deepak Devegowda
- Mewbourne School of Petroleum and Geological EngineeringThe University of Oklahoma Norman Oklahoma USA
| | - Liangliang Huang
- Chemical, Biological & Materials EngineeringThe University of Oklahoma Norman Oklahoma USA
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44
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Seki T, Yu CC, Yu X, Ohto T, Sun S, Meister K, Backus EHG, Bonn M, Nagata Y. Decoding the molecular water structure at complex interfaces through surface-specific spectroscopy of the water bending mode. Phys Chem Chem Phys 2020; 22:10934-10940. [PMID: 32373844 DOI: 10.1039/d0cp01269f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The structure of interfacial water determines atmospheric chemistry, wetting properties of materials, and protein folding. The challenge of investigating the properties of specific interfacial water molecules has frequently been confronted using surface-specific sum-frequency generation (SFG) vibrational spectroscopy using the O-H stretch mode. While perfectly suited for the water-air interface, for complex interfaces, a potential complication arises from the contribution of hydroxyl or amine groups of non-water species present at the surface, such as surface hydroxyls on minerals, or O-H and N-H groups contained in proteins. Here, we present a protocol to extract the hydrogen bond strength selectively of interfacial water, through the water bending mode. The bending mode vibrational frequency distribution provides a new avenue for unveiling the hydrogen bonding structure of interfacial water at complex aqueous interfaces. We demonstrate this method for the water-CaF2 and water-protein interfaces. For the former, we show that this method can indeed single out water O-H groups from surface hydroxyls, and that with increasing pH, the hydrogen-bonded network of interfacial water strengthens. Furthermore, we unveil enhanced hydrogen bonding of water, compared to bulk water, at the interface with human serum albumin proteins, a prototypical bio-interface.
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Affiliation(s)
- Takakazu Seki
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
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45
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Tuladhar A, Dewan S, Pezzotti S, Brigiano FS, Creazzo F, Gaigeot MP, Borguet E. Ions Tune Interfacial Water Structure and Modulate Hydrophobic Interactions at Silica Surfaces. J Am Chem Soc 2020; 142:6991-7000. [DOI: 10.1021/jacs.9b13273] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Aashish Tuladhar
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
- Physical Sciences Division, Physical & Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Shalaka Dewan
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Simone Pezzotti
- LAMBE UMR8587, Université d’Evry val d’Essonne, CNRS, CEA, Université Paris-Saclay, 91025 Evry, France
| | - Flavio Siro Brigiano
- LAMBE UMR8587, Université d’Evry val d’Essonne, CNRS, CEA, Université Paris-Saclay, 91025 Evry, France
| | - Fabrizio Creazzo
- LAMBE UMR8587, Université d’Evry val d’Essonne, CNRS, CEA, Université Paris-Saclay, 91025 Evry, France
| | - Marie-Pierre Gaigeot
- LAMBE UMR8587, Université d’Evry val d’Essonne, CNRS, CEA, Université Paris-Saclay, 91025 Evry, France
| | - Eric Borguet
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
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46
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Nietiadi ML, Rosandi Y, Urbassek HM. Bouncing of Hydroxylated Silica Nanoparticles: an Atomistic Study Based on REAX Potentials. NANOSCALE RESEARCH LETTERS 2020; 15:67. [PMID: 32232683 PMCID: PMC7105590 DOI: 10.1186/s11671-020-03296-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 03/09/2020] [Indexed: 06/10/2023]
Abstract
Clean silica surfaces have a high surface energy. In consequence, colliding silica nanoparticles will stick rather than bounce over a wide range of collision velocities. Often, however, silica surfaces are passivated by adsorbates, in particular water, which considerably reduce the surface energy. We study the effect of surface hydroxylation on silica nanoparticle collisions by atomistic simulation, using the REAX potential that allows for bond breaking and formation. We find that the bouncing velocity is reduced by more than an order of magnitude compared to clean nanoparticle collisions.
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Affiliation(s)
- Maureen L Nietiadi
- Physics Department and Research Center OPTIMAS, University Kaiserslautern, Erwin-Schrödinger-Straße, Kaiserslautern, 67663, Germany
| | - Yudi Rosandi
- Department of Geophysics, Universitas Padjadjaran, Jatinangor, Sumedang, 45363, Indonesia
| | - Herbert M Urbassek
- Physics Department and Research Center OPTIMAS, University Kaiserslautern, Erwin-Schrödinger-Straße, Kaiserslautern, 67663, Germany.
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47
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Peng M, Duignan TT, Zhao XS, Nguyen AV. Surface Potential Explained: A Surfactant Adsorption Model Incorporating Realistic Layer Thickness. J Phys Chem B 2020; 124:3195-3205. [DOI: 10.1021/acs.jpcb.0c00278] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mengsu Peng
- School of Chemical Engineering, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Timothy T. Duignan
- School of Chemical Engineering, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Xiu Song Zhao
- School of Chemical Engineering, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Anh V. Nguyen
- School of Chemical Engineering, University of Queensland, Brisbane, Queensland 4072, Australia
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48
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Wang C, Luo Y, Li X, Zhang F, Wang F, Han X, Wang T, Beke-Somfai T, Lu X. Revealing Molecular-Level Interaction between a Polymeric Drug and Model Membrane Via Sum Frequency Generation and Microfluidics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1615-1622. [PMID: 31967838 DOI: 10.1021/acs.langmuir.9b03676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Body fluids flow all over the body and affect the biological processes at biointerfaces. To simulate such a case, sum frequency generation (SFG) vibrational spectroscopy and a self-designed microfluidic chip were combined together to investigate the interaction between a pH-responsive polymeric drug, poly(α-propylacrylic acid) (PPAAc), and the model cell membranes in different liquid environments. By examining the SFG spectra under the static and flowing conditions, the drug-membrane interaction was revealed comprehensively. The interfacial water layer was screened as the key factor affecting the drug-membrane interaction. The interfacial water layer can prevent the side propyl groups on PPAAc from inserting into the model cell membrane but would be disrupted by numerous ions in buffer solutions. Without flowing, at pH 6.6, the interaction between PPAAc and the model cell membrane was strongest; with flowing, at pH 5.8, the interaction was strongest. Flowing was proven to substantially affect the interaction between PPAAc and the model cell membranes, suggesting that the fluid environment was of key significance for biointerfaces. This work demonstrated that, by combining SFG and microfluidics, new information about the molecular-level interaction between macromolecules and the model cell membranes can be acquired, which cannot be obtained by collecting the normal static SFG spectra.
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Affiliation(s)
- Chu Wang
- Department of Biomedical Engineering , Southeast University , Jiangsu 210096 , China
| | - Yongsheng Luo
- Department of Biomedical Engineering , Southeast University , Jiangsu 210096 , China
| | - Xu Li
- Department of Biomedical Engineering , Southeast University , Jiangsu 210096 , China
| | - Furong Zhang
- Department of Biomedical Engineering , Southeast University , Jiangsu 210096 , China
| | - Feng Wang
- Department of Biomedical Engineering , Southeast University , Jiangsu 210096 , China
| | - Xiaofeng Han
- Department of Biomedical Engineering , Southeast University , Jiangsu 210096 , China
| | - Ting Wang
- Department of Biomedical Engineering , Southeast University , Jiangsu 210096 , China
| | - Tamás Beke-Somfai
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences , Hungarian Academy of Sciences , H-1117 Budapest , Hungary
| | - Xiaolin Lu
- Department of Biomedical Engineering , Southeast University , Jiangsu 210096 , China
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49
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Liu Z, Li Y, Xu Q, Wang H, Liu WT. Coherent Vibrational Spectroscopy of Electrochemical Interfaces with Plasmonic Nanogratings. J Phys Chem Lett 2020; 11:243-248. [PMID: 31724400 DOI: 10.1021/acs.jpclett.9b02985] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The fundamental understanding of electrochemistry urges accurate knowledge of all interfacial properties at the molecular level, but the retrieval of such information is a real challenge. Optical spectroscopies facilitated by surface plasmon enhancement can shed light on this field, yet past studies relied on either highly inhomogeneous "hot spots" or planar plasmon modes with limited enhancement. Here we report an in situ sum-frequency vibrational spectroscopy scheme using plasmonic nanogratings, which enable strong, coherent surface plasmon excitation even on planar electrodes. With two classical reactions, the gold oxidation and pyridine adsorption in water, we demonstrate the realization of coherent vibrational spectroscopy in the strong absorption region, revealing the polar orientation and ordering of interfacial species that are crucial toward the mechanistic understanding of electrochemical phenomena.
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Affiliation(s)
- Zhihua Liu
- Physics Department, State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures [Ministry of Education (MOE)] , Fudan University , Shanghai 200433 , China
| | - Ying Li
- Physics Department, State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures [Ministry of Education (MOE)] , Fudan University , Shanghai 200433 , China
| | - Qian Xu
- Physics Department, State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures [Ministry of Education (MOE)] , Fudan University , Shanghai 200433 , China
| | - Hongqing Wang
- Physics Department, State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures [Ministry of Education (MOE)] , Fudan University , Shanghai 200433 , China
| | - Wei-Tao Liu
- Physics Department, State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures [Ministry of Education (MOE)] , Fudan University , Shanghai 200433 , China
- Collaborative Innovation Center of Advanced Microstructures , Nanjing 210093 , China
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Peng M, Nguyen AV. Adsorption of ionic surfactants at the air-water interface: The gap between theory and experiment. Adv Colloid Interface Sci 2020; 275:102052. [PMID: 31753297 DOI: 10.1016/j.cis.2019.102052] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Accepted: 10/21/2019] [Indexed: 10/25/2022]
Abstract
We review the experimental and theoretical results for the adsorption and structure of ionic surfactants at the air-liquid interface. The results show that ionic surfactants form thick adsorption layers at the interfacial region. We also review several adsorption models for ionic surfactants, which become increasingly complex as they capture the many features of adsorption layers. However, the adsorption layer structures determined by experiments and the structures predicted by models do not match because most models assume very thin adsorption layers. We show the discrepancies between measured and predicted surface properties and provide several explanations. We conclude that the mismatch in the adsorption layer structure provided by experiments and the structure provided by adsorption models is the main reason for the discrepancies in the surface excess and the surface potential.
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