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Yang H, Ji G, Choi M, Park S, An H, Lee HT, Jeong J, Park YD, Kim K, Park N, Jeong J, Kim DS, Park HR. Suppressed terahertz dynamics of water confined in nanometer gaps. SCIENCE ADVANCES 2024; 10:eadm7315. [PMID: 38657066 PMCID: PMC11042745 DOI: 10.1126/sciadv.adm7315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 03/21/2024] [Indexed: 04/26/2024]
Abstract
Nanoconfined waters exhibit low static permittivity mainly due to interfacial effects that span about one nanometer. The characteristic length scale may be much longer in the terahertz (THz) regime where long-range collective dynamics occur; however, the THz dynamics have been largely unexplored because of the lack of a robust platform. Here, we use metallic loop nanogaps to sharply enhance light-matter interactions and precisely measure real and imaginary THz refractive indices of nanoconfined water at gap widths ranging from 2 to 20 nanometers, spanning mostly interfacial waters all the way to quasi-bulk waters. We find that, in addition to the well-known interfacial effect, the confinement effect also contributes substantially to the decrease in the complex refractive indices of the nanoconfined water by cutting off low-energy vibrational modes, even at gap widths as large as 10 nanometers. Our findings provide valuable insights into the collective dynamics of water molecules which is crucial to understanding water-mediated processes.
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Affiliation(s)
- Hyosim Yang
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Gangseon Ji
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Min Choi
- Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Seondo Park
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyeonjun An
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Hyoung-Taek Lee
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Joonwoo Jeong
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Yun Daniel Park
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyungwan Kim
- Department of Physics, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Noejung Park
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Jeeyoon Jeong
- Department of Physics and Institute for Quantum Convergence Technology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Dai-Sik Kim
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyeong-Ryeol Park
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
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Majood M, Agrawal O, Garg P, Selvam A, Yadav SK, Singh S, Kalyansundaram D, Verma YK, Nayak R, Mohanty S, Mukherjee M. Carbon quantum dot-nanocomposite hydrogel as Denovo Nexus in rapid chondrogenesis. BIOMATERIALS ADVANCES 2024; 157:213730. [PMID: 38101066 DOI: 10.1016/j.bioadv.2023.213730] [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: 09/16/2023] [Revised: 11/15/2023] [Accepted: 12/07/2023] [Indexed: 12/17/2023]
Abstract
The incapability of cartilage to naturally regenerate and repair chronic muscular injuries urges the development of competent bionic rostrums. There is a need to explore faster strategies for chondrogenic engineering using mesenchymal stem cells (MSCs). Along these lines, rapid chondrocyte differentiation would benefit the transplantation demand affecting osteoarthritis (OA) and rheumatoid arthritis (RA) patients. In this report, a de novo nanocomposite was constructed by integrating biogenic carbon quantum dot (CQD) filler into synthetic hydrogel prepared from dimethylaminoethyl methacrylate (DMAEMA) and acrylic acid (AAc). The dominant structural integrity of synthetic hydrogel along with the chondrogenic differentiation potential of garlic peel derived CQDs led to faster chondrogenesis within 14 days. By means of extensive chemical and morphological characterization techniques, we illustrate that the hydrogel nanocomposite possesses lucrative features to influence rapid chondrogenesis. These results were further corroborated by bright field imaging, Alcian blue staining and Masson trichome staining. Thus, this stratagem of chondrogenic engineering conceptualizes to be a paragon in clinical wound care for the rapid manufacturing of chondrocytes.
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Affiliation(s)
- Misba Majood
- Amity Institute of Click Chemistry Research and Studies, Amity University Uttar Pradesh, Noida 201313, India
| | - Omnarayan Agrawal
- Amity Institute of Click Chemistry Research and Studies, Amity University Uttar Pradesh, Noida 201313, India
| | - Piyush Garg
- Amity Institute of Click Chemistry Research and Studies, Amity University Uttar Pradesh, Noida 201313, India
| | - Abhyavartin Selvam
- Amity Institute of Click Chemistry Research and Studies, Amity University Uttar Pradesh, Noida 201313, India; Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Noida 201313, India
| | - Sunil Kumar Yadav
- Center of Biomedical Engineering, Indian Institute of Technology, New Delhi 110016, India
| | - Sonu Singh
- Center of Biomedical Engineering, Indian Institute of Technology, New Delhi 110016, India
| | - Dinesh Kalyansundaram
- Center of Biomedical Engineering, Indian Institute of Technology, New Delhi 110016, India
| | - Yogesh Kumar Verma
- Division of Stem Cell & Gene Therapy Research, Institute of Nuclear Medicine & Allied Sciences, Delhi 110054, India
| | - Ranu Nayak
- Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Noida 201313, India
| | - Sujata Mohanty
- Stem Cell Facility, DBT center of Excellence, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Monalisa Mukherjee
- Amity Institute of Click Chemistry Research and Studies, Amity University Uttar Pradesh, Noida 201313, India.
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Rahbar M, Stein CJ. A Statistical Perspective on Microsolvation. J Phys Chem A 2023; 127:2176-2193. [PMID: 36854176 DOI: 10.1021/acs.jpca.2c08763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
The lack of a procedure to determine equilibrium thermodynamic properties of a small system interacting with a bath is frequently seen as a weakness of conventional statistical mechanics. A typical example for such a small system is a solute surrounded by an explicit solvation shell. One way to approach this problem is to enclose the small system of interest in a large bath of explicit solvent molecules, considerably larger than the system itself. The explicit inclusion of the solvent degrees of freedom is obviously limited by the available computational resources. A potential remedy to this problem is a microsolvation approach where only a few explicit solvent molecules are considered and surrounded by an implicit solvent bath. Still, the sampling of the solvent degrees of freedom is challenging with conventional grand canonical Monte Carlo methods, since no single chemical potential for the solvent molecules can be defined in the realm of small-system thermodynamics. In this work, a statistical thermodynamic model based on the grand canonical ensemble is proposed that avoids the conventional system size limitations and accurately characterizes the properties of the system of interest subject to the thermodynamic constraints of the bath. We extend an existing microsolvation approach to a generalized multibath "microstatistical" model and show that the previously derived approaches result as a limit of our model. The framework described here is universal and we validate our method numerically for a Lennard-Jones model fluid.
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Affiliation(s)
- Mohammad Rahbar
- Theoretische Physik and CENIDE, Universität Duisburg-Essen, D-47048 Duisburg, Germany
| | - Christopher J Stein
- Theoretische Physik and CENIDE, Universität Duisburg-Essen, D-47048 Duisburg, Germany
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Majood M, Shakeel A, Agarwal A, Jeevanandham S, Bhattacharya R, Kochhar D, Singh A, Kalyanasundaram D, Mohanty S, Mukherjee M. Hydrogel Nanosheets Confined 2D Rhombic Ice: A New Platform Enhancing Chondrogenesis. Biomed Mater 2022; 17. [PMID: 36044885 DOI: 10.1088/1748-605x/ac8e43] [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: 04/22/2022] [Accepted: 08/31/2022] [Indexed: 11/12/2022]
Abstract
Nanoconfinement within flexible interfaces is a key step towards exploiting confinement effects in several biological and technological systems wherein flexible 2D materials are frequently utilized but are arduous to prepare. Hitherto unreported, the synthesis of 2D Hydrogel nanosheets (HNS) using a template- and catalyst-free process is developed representing a fertile ground for fundamental structure-property investigations. In due course of time, nucleating folds propagating along the edges trigger co-operative deformations of HNS generating regions of nanoconfinement within trapped water islands. These severely constricting surfaces force water molecules to pack within the nanoscale regime of HNS almost parallel to the surface bringing about phase transition into puckered rhombic ice with AA and AB Bernal stacking pattern, which was mostly restricted to Molecular dynamics (MD) studies so far. Interestingly, under high lateral pressure and spatial inhomogeneity within nanoscale confinement, bilayer rhombic ice structures were formed with an in-plane lattice spacing of 0.31 nm. In this work, a systematic exploration of rhombic ice formation within HNS has been delineated using High-resolution transmission electron microscopy (HRTEM), and its ultrathin morphology was examined using Atomic Force Microscopy (AFM). Scanning Electron Microscopy (SEM) images revealed high porosity while mechanical testing presented young's modulus of 155 kPa with ~84% deformation, whereas contact angle suggested high hydrophilicity. The combinations of nanosheets, porosity, nanoconfinement, hydrophilicity, and mechanical strength, motivated us to explore their application as a scaffold for cartilage regeneration, by inducing chondrogenesis of human Wharton Jelly derived mesenchymal stem cells (hWJ MSCs). HNS promoted the formation of cell aggregates giving higher number of spheroid formation and a marked expression of chondrogenic markers (ColI, ColII, ColX, ACAN and S-100), thereby providing some cues for guiding chondrogenic differentiation.
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Affiliation(s)
- Misba Majood
- AICCRS, Amity University, Sector 125, Noida, Noida, Uttar Pradesh, 201313, INDIA
| | - Adeeba Shakeel
- AICCRS, Amity University, Sector 125, Noida, Uttar Pradesh, 201313, INDIA
| | - Aakanksha Agarwal
- AICCRS, Amity University, Sector 125, Noida, Uttar Pradesh, 201313, INDIA
| | | | | | - Dakshi Kochhar
- Amity University, Sector 125, Noida, Uttar Pradesh, 201313, INDIA
| | - Aarti Singh
- AICCRS, Amity University, Sector 125, Noida, Uttar Pradesh, 201313, INDIA
| | | | - Sujata Mohanty
- Stem Cell Facility, All India Institute of Medical Sciences Cardio-Thoracic Sciences Centre, Orbo Building, first floor,, Ansari Nagar, New Delhi, New Delhi, Delhi, 110029, INDIA
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Atamas N, Gavryushenko D, Yablochkova K, Lazarenko M, Taranyik G. Temperature and temporal heterogeneities of water dynamics in the physiological temperature range. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lecot S, Lavigne A, Yang Z, Chevolot Y, Phaner-Goutorbe M, Yeromonahos C. Effects of the Chemical and Structural Properties of Silane Monolayers on the Organization of Water Molecules and Ions at Interfaces, from Molecular Dynamics Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5563-5572. [PMID: 33914530 DOI: 10.1021/acs.langmuir.1c00338] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Understanding the organization of the hydration layer at functionalized silica surfaces is relevant for a large range of biosensing applications or surface phenomena such as biomolecule adsorption. Silane monolayers are widely used to functionalize silica surfaces. Using molecular dynamics simulations, we have investigated the role of silane molecule head-group charge, alkyl chain length, and surface coverage in the structural organization and dynamic properties of Na+ ions, Cl- ions, and water molecules at the interface. The silane molecules studied are 3-aminopropyldimethylethoxysilane, n-propyldimethylmethoxysilane, octadecyldimethylmethoxysilane, and (dimethylamino)dimethylsilylundecanoate. Our results suggest that the distribution of interfacial ions is sensitive to the 2D dispersion of the silane-charged head groups. Also, while charged silane monolayers show a strong orientation of interfacial water molecules, which leads to a rupture in the hydrogen bond network and disturbs their tetrahedral organization, the arrangement of water molecules at the interface with uncharged silane monolayers seems to be related to the surface roughness and to alkyl chain length. In line with these results, the diffusion of ions and water molecules is higher at the CH3 long monolayer interface than at the CH3 short monolayer interface and at the charged monolayer interfaces. Also, whatever the silane molecules studied, bulk properties are recovered around 0.7 nm above the interface. The interfacial water organization is known to impact biomolecule adsorption. Therefore, these results could further help in optimizing the functionalization layers to capture analytes.
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Affiliation(s)
- Solène Lecot
- Université de Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, 69130 Ecully, France
| | - Antonin Lavigne
- Université de Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, 69130 Ecully, France
| | - Zihua Yang
- Université de Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, 69130 Ecully, France
| | - Yann Chevolot
- Université de Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, 69130 Ecully, France
| | - Magali Phaner-Goutorbe
- Université de Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, 69130 Ecully, France
| | - Christelle Yeromonahos
- Université de Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, 69130 Ecully, France
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Bülbül E, Hegemann D, Geue T, Heuberger M. How the dynamics of subsurface hydration regulates protein-surface interactions. Colloids Surf B Biointerfaces 2020; 190:110908. [PMID: 32163842 DOI: 10.1016/j.colsurfb.2020.110908] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/13/2020] [Accepted: 02/25/2020] [Indexed: 10/24/2022]
Abstract
The role of water structure near surfaces has been scrutinized extensively because it is accepted to control protein-surface interactions, however, often avoiding effects of hydration dynamics. Relating to this, we have recently discussed how the amount and state of water, accumulated within various hydrophobic-to-hydrophilic subsurface gradients of plasma polymer films, influence the magnitude of adsorbed bovine serum albumin, spurring the hypothesis of the presence of a subsurface dipolar field. This study now analyzes the kinetics of hydration by systematically introducing modified gradient architectures and relating different hydration times to the adsorption of a dipolar probing protein. We find that dry-stored subsurface gradients, owing nominally identical surface characteristics, exhibits comparable surface potential and protein adsorption values, while they behave in a different manner at transient hydration times of few hours, before reaching near-equilibrium state of the hydration. A characteristic hydration time is found where protein adsorption on gradient films is minimal, unveiling the transient nature of the effect. In general, protein adsorption is sensitive to the time allowed for hydration of the adsorbent surface, supporting our initial hypothesis inasmuch as the quantity as well as quality of water inside the subsurface matrix is crucial for controlling protein-surface interactions.
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Affiliation(s)
- Ezgi Bülbül
- Laboratory for Advanced Fibers, Empa, Swiss Federal Laboratories for Materials Science and Technology, 9014, St. Gallen, Switzerland; Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, 8093, Zurich, Switzerland.
| | - Dirk Hegemann
- Laboratory for Advanced Fibers, Empa, Swiss Federal Laboratories for Materials Science and Technology, 9014, St. Gallen, Switzerland.
| | - Thomas Geue
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute (PSI), 5232, Villigen, Switzerland.
| | - Manfred Heuberger
- Laboratory for Advanced Fibers, Empa, Swiss Federal Laboratories for Materials Science and Technology, 9014, St. Gallen, Switzerland; Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, 8093, Zurich, Switzerland.
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Bülbül E, Rupper P, Geue T, Bernard L, Heuberger M, Hegemann D. Extending the Range of Controlling Protein Adsorption via Subsurface Architecture. ACS APPLIED MATERIALS & INTERFACES 2019; 11:42760-42772. [PMID: 31644873 DOI: 10.1021/acsami.9b14584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Recently, it has been shown that water, confined in a plasma polymer subsurface chemical gradient, nanometers below the surface, significantly reduced the amount of adsorbed protein bovine serum albumin (BSA). Relating to this effect, we proposed the hypothesis that oriented water molecules within the subsurface gradient generate a long-range dipolar field, which interacts with dipolar proteins such as BSA near the surface region. This study extends the above used in situ multistep plasma deposition process to introduce plasma oxidation modifications of the subsurface architecture with the aim to further control the effect on protein adsorption. Neutron reflectivity measurements reveal that the oxidation time increases the amount of matrix-confined water. There is, however, an optimal oxidation time to obtain minimal protein adsorption, which suggests that a minimal distance between confined water molecules plays an important role. Altogether we can extend the range of controlling the adsorbed protein mass by the introduction of this additional plasma oxidation step.
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Affiliation(s)
- Ezgi Bülbül
- Laboratory for Advanced Fibers, Empa , Swiss Federal Laboratories for Materials Science and Technology , 9014 St. Gallen , Switzerland
- Laboratory for Surface Science and Technology, Department of Materials , ETH Zurich , 8093 Zurich , Switzerland
| | - Patrick Rupper
- Laboratory for Advanced Fibers, Empa , Swiss Federal Laboratories for Materials Science and Technology , 9014 St. Gallen , Switzerland
| | - Thomas Geue
- Laboratory for Neutron Scattering and Imaging , Paul Scherrer Institute , 5232 Villigen PSI , Switzerland
| | - Laetitia Bernard
- Laboratory for Nanoscale Materials Science, Empa , Swiss Federal Laboratories for Materials Science and Technology , 8600 Dübendorf , Switzerland
| | - Manfred Heuberger
- Laboratory for Advanced Fibers, Empa , Swiss Federal Laboratories for Materials Science and Technology , 9014 St. Gallen , Switzerland
- Laboratory for Surface Science and Technology, Department of Materials , ETH Zurich , 8093 Zurich , Switzerland
| | - Dirk Hegemann
- Laboratory for Advanced Fibers, Empa , Swiss Federal Laboratories for Materials Science and Technology , 9014 St. Gallen , Switzerland
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Functionality and chemical stability of plasma polymer films exhibiting a vertical cross-linking gradient in their subsurface. Polym Degrad Stab 2018. [DOI: 10.1016/j.polymdegradstab.2018.09.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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