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Almousa R, Xie D, Chen Y, Li J, Anderson GG. Thermoplastic polyurethane surface coated with polymer brushes for reduced protein and cell attachment. J Biomater Appl 2024; 38:758-771. [PMID: 37963494 DOI: 10.1177/08853282231213937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
The objective of this study was to coat negatively charged polymer brushes covalently onto the surface of thermoplastic polyurethane (TPU) using a simple conventional surface free-radical polymerization technique. The coated surfaces were assessed with contact angle, protein adsorption, cell adhesion and bacterial adhesion. Bovine serum albumin (BSA) and bovine fibrinogen (BFG) were used for protein adsorption evaluation. Mouse fibroblasts (NIH-3T3) and Pseudomonas aeruginosa (P. aeruginosa) were used to assess surface adhesion. Results show that the TPU surface modified with the attached polymer brushes exhibited significantly reduced contact angle, protein adsorption, and cell as well as bacterial adhesion, among which the negatively charged polymers showed the extremely low values in all the tests. Its contact angle is 5°, as compared to 70° for original TPU. Its BSA, BFG, 3T3 adhesion and P. aeruginosa adhesion were 93%, 84%, 92%, and 93% lower than original TPU. Furthermore, the TPU surface coated with negatively charged polymer brushes exhibited a hydrogel-like property. The results indicate that placing acrylic acids using a simple surface-initiated free-radical polymerization onto a TPU surface and then converting those to negative charges can be an effective and efficient route for fouling resistant applications.
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Affiliation(s)
- Rashed Almousa
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette IN, USA
- Department of Medical Equipment Technology, Majmaah University, Al-Majmaah, Saudi Arabia
| | - Dong Xie
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette IN, USA
- Department of Biomedical Engineering, Indiana University Purdue University at Indianapolis, Indianapolis, IN, United States
| | - Yong Chen
- Department of Biomedical Engineering, Indiana University Purdue University at Indianapolis, Indianapolis, IN, United States
| | - Jiliang Li
- Department of Biology, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Gregory G Anderson
- Department of Biology, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
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2
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Santander EA, Bravo G, Chang-Halabi Y, Olguín-Orellana GJ, Naulin PA, Barrera MJ, Montenegro FA, Barrera NP. The Adsorption of P2X2 Receptors Interacting with IgG Antibodies Revealed by Combined AFM Imaging and Mechanical Simulation. Int J Mol Sci 2023; 25:336. [PMID: 38203505 PMCID: PMC10778698 DOI: 10.3390/ijms25010336] [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: 10/30/2023] [Revised: 12/16/2023] [Accepted: 12/19/2023] [Indexed: 01/12/2024] Open
Abstract
The adsorption of proteins onto surfaces significantly impacts biomaterials, medical devices, and biological processes. This study aims to provide insights into the irreversible adsorption process of multiprotein complexes, particularly focusing on the interaction between anti-His6 IgG antibodies and the His6-tagged P2X2 receptor. Traditional approaches to understanding protein adsorption have centered around kinetic and thermodynamic models, often examining individual proteins and surface coverage, typically through Molecular Dynamics (MD) simulations. In this research, we introduce a computational approach employing Autodesk Maya 3D software for the investigation of multiprotein complexes' adsorption behavior. Utilizing Atomic Force Microscopy (AFM) imaging and Maya 3D-based mechanical simulations, our study yields real-time structural and kinetic observations. Our combined experimental and computational findings reveal that the P2X2 receptor-IgG antibody complex likely undergoes absorption in an 'extended' configuration. Whereas the P2X2 receptor is less adsorbed once is complexed to the IgG antibody compared to its individual state, the opposite is observed for the antibody. This insight enhances our understanding of the role of protein-protein interactions in the process of protein adsorption.
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Affiliation(s)
- Eduardo A. Santander
- Laboratory of Nanophysiology and Structural Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Alameda 340, Santiago 8331150, Chile; (E.A.S.); (G.B.); (G.J.O.-O.)
| | - Graciela Bravo
- Laboratory of Nanophysiology and Structural Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Alameda 340, Santiago 8331150, Chile; (E.A.S.); (G.B.); (G.J.O.-O.)
- Department of Chemical and Bioprocess Engineering, School of Engineering, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Yuan Chang-Halabi
- Laboratory of Nanophysiology and Structural Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Alameda 340, Santiago 8331150, Chile; (E.A.S.); (G.B.); (G.J.O.-O.)
| | - Gabriel J. Olguín-Orellana
- Laboratory of Nanophysiology and Structural Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Alameda 340, Santiago 8331150, Chile; (E.A.S.); (G.B.); (G.J.O.-O.)
| | - Pamela A. Naulin
- Laboratory of Nanophysiology and Structural Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Alameda 340, Santiago 8331150, Chile; (E.A.S.); (G.B.); (G.J.O.-O.)
| | - Mario J. Barrera
- Laboratory of Nanophysiology and Structural Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Alameda 340, Santiago 8331150, Chile; (E.A.S.); (G.B.); (G.J.O.-O.)
| | - Felipe A. Montenegro
- Laboratory of Nanophysiology and Structural Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Alameda 340, Santiago 8331150, Chile; (E.A.S.); (G.B.); (G.J.O.-O.)
| | - Nelson P. Barrera
- Laboratory of Nanophysiology and Structural Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Alameda 340, Santiago 8331150, Chile; (E.A.S.); (G.B.); (G.J.O.-O.)
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3
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Svirelis J, Adali Z, Emilsson G, Medin J, Andersson J, Vattikunta R, Hulander M, Järlebark J, Kolman K, Olsson O, Sakiyama Y, Lim RYH, Dahlin A. Stable trapping of multiple proteins at physiological conditions using nanoscale chambers with macromolecular gates. Nat Commun 2023; 14:5131. [PMID: 37612271 PMCID: PMC10447545 DOI: 10.1038/s41467-023-40889-4] [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: 02/07/2023] [Accepted: 08/11/2023] [Indexed: 08/25/2023] Open
Abstract
The possibility to detect and analyze single or few biological molecules is very important for understanding interactions and reaction mechanisms. Ideally, the molecules should be confined to a nanoscale volume so that the observation time by optical methods can be extended. However, it has proven difficult to develop reliable, non-invasive trapping techniques for biomolecules under physiological conditions. Here we present a platform for long-term tether-free (solution phase) trapping of proteins without exposing them to any field gradient forces. We show that a responsive polymer brush can make solid state nanopores switch between a fully open and a fully closed state with respect to proteins, while always allowing the passage of solvent, ions and small molecules. This makes it possible to trap a very high number of proteins (500-1000) inside nanoscale chambers as small as one attoliter, reaching concentrations up to 60 gL-1. Our method is fully compatible with parallelization by imaging arrays of nanochambers. Additionally, we show that enzymatic cascade reactions can be performed with multiple native enzymes under full nanoscale confinement and steady supply of reactants. This platform will greatly extend the possibilities to optically analyze interactions involving multiple proteins, such as the dynamics of oligomerization events.
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Affiliation(s)
- Justas Svirelis
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden
| | - Zeynep Adali
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden
| | - Gustav Emilsson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden
| | - Jesper Medin
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden
| | - John Andersson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden
| | - Radhika Vattikunta
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden
| | - Mats Hulander
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden
| | - Julia Järlebark
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden
| | - Krzysztof Kolman
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden
| | - Oliver Olsson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden
| | - Yusuke Sakiyama
- Biozentrum and the Swiss Nanoscience Institute, University of Basel, 4056, Basel, Switzerland
| | - Roderick Y H Lim
- Biozentrum and the Swiss Nanoscience Institute, University of Basel, 4056, Basel, Switzerland
| | - Andreas Dahlin
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296, Gothenburg, Sweden.
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4
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Kamada R, Miyazaki H, Janairo JIB, Chuman Y, Sakaguchi K. Bilayer Hydrogel Composed of Elastin-Mimetic Polypeptides as a Bio-Actuator with Bidirectional and Reversible Bending Behaviors. Molecules 2023; 28:5274. [PMID: 37446933 DOI: 10.3390/molecules28135274] [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: 06/15/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 07/15/2023] Open
Abstract
Biologically derived hydrogels have attracted attention as promising polymers for use in biomedical applications because of their high biocompatibility, biodegradability, and low toxicity. Elastin-mimetic polypeptides (EMPs), which contain a repeated amino acid sequence derived from the hydrophobic domain of tropoelastin, exhibit reversible phase transition behavior, and thus, represent an interesting starting point for the development of biologically derived hydrogels. In this study, we succeeded in developing functional EMP-conjugated hydrogels that displayed temperature-responsive swelling/shrinking properties. The EMP-conjugated hydrogels were prepared through the polymerization of acrylated EMP with acrylamide. The EMP hydrogel swelled and shrank in response to temperature changes, and the swelling/shrinking capacity of the EMP hydrogels could be controlled by altering either the amount of EMP or the salt concentration in the buffer. The EMP hydrogels were able to select a uniform component of EMPs with a desired and specific repeat number of the EMP sequence, which could control the swelling/shrinking property of the EMP hydrogel. Moreover, we developed a smart hydrogel actuator based on EMP crosslinked hydrogels and non-crosslinked hydrogels that exhibited bidirectional curvature behavior in response to changes in temperature. These thermally responsive EMP hydrogels have potential use as bio-actuators for a number of biomedical applications.
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Affiliation(s)
- Rui Kamada
- Laboratory of Biological Chemistry, Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Hiromitsu Miyazaki
- Laboratory of Biological Chemistry, Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Jose Isagani B Janairo
- Department of Biology, College of Science, De La Salle University, Manila 0922, Philippines
| | - Yoshiro Chuman
- Laboratory of Biological Chemistry, Department of Chemistry, Faculty of Science, Niigata University, Niigata 950-2181, Japan
| | - Kazuyasu Sakaguchi
- Laboratory of Biological Chemistry, Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
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5
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Saitta L, Cutuli E, Celano G, Tosto C, Stella G, Cicala G, Bucolo M. A Regression Approach to Model Refractive Index Measurements of Novel 3D Printable Photocurable Resins for Micro-Optofluidic Applications. Polymers (Basel) 2023; 15:2690. [PMID: 37376336 DOI: 10.3390/polym15122690] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/05/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023] Open
Abstract
In this work, a quadratic polynomial regression model was developed to aid practitioners in the determination of the refractive index value of transparent 3D printable photocurable resins usable for micro-optofluidic applications. The model was experimentally determined by correlating empirical optical transmission measurements (the dependent variable) to known refractive index values (the independent variable) of photocurable materials used in optics, thus obtaining a related regression equation. In detail, a novel, simple, and cost-effective experimental setup is proposed in this study for the first time for collecting the transmission measurements of smooth 3D printed samples (roughness ranging between 0.04 and 2 μm). The model was further used to determine the unknown refractive index value of novel photocurable resins applicable in vat photopolymerization (VP) 3D printing techniques for manufacturing micro-optofluidic (MoF) devices. In the end, this study proved how knowledge of this parameter allowed us to compare and interpret collected empirical optical data from microfluidic devices made of more traditional materials, i.e., Poly(dimethylsiloxane) (PDMS), up to novel 3D printable photocurable resins suitable for biological and biomedical applications. Thus, the developed model also provides a quick method to evaluate the suitability of novel 3D printable resins for MoF device fabrication within a well-defined range of refractive index values (1.56; 1.70).
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Affiliation(s)
- Lorena Saitta
- Department of Civil Engineering and Architecture, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Emanuela Cutuli
- Department of Electrical Electronic and Computer Science Engineering, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Giovanni Celano
- Department of Civil Engineering and Architecture, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Claudio Tosto
- Department of Civil Engineering and Architecture, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Giovanna Stella
- Department of Electrical Electronic and Computer Science Engineering, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Gianluca Cicala
- Department of Civil Engineering and Architecture, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
- INSTM-UDR CT, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Maide Bucolo
- Department of Electrical Electronic and Computer Science Engineering, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
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6
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A Comparative Study of PMETAC-Modified Mesoporous Silica and Titania Thin Films for Molecular Transport Manipulation. Polymers (Basel) 2022; 14:polym14224823. [PMID: 36432949 PMCID: PMC9692692 DOI: 10.3390/polym14224823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/26/2022] [Accepted: 11/01/2022] [Indexed: 11/12/2022] Open
Abstract
The manipulation and understanding of molecular transport across functionalized nanopores will take us closer to mimicking biological membranes and thus to design high-performance permselective separation systems. In this work, Surface-initiated atom transfer radical polymerization (SI-ATRP) of (2-methacryloyloxy)-ethyltrimethylammonium chloride (METAC) was performed on both mesoporous silica and mesoporous titania thin films. Pores were proven to be filled using ellipsometry and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Furthermore, the employed method leads to a polymer overlayer, whose thickness could be discriminated using a double-layer ellipsometry model. Cyclic voltammetry experiments reveal that the transport of electrochemically active probes is affected by the PMETAC presence, both due to the polymer overlayer and the confined charge of the pore-tethered PMETAC. A more detailed study demonstrates that ion permeability depends on the combined role of the inorganic scaffolds' (titania and silica) surface chemistry and the steric and charge exclusion properties of the polyelectrolyte. Interestingly, highly charged negative walls with positively charged polymers may resemble zwitterionic polymer behavior in confined environments.
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7
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Temperature-Responsive Polymer Brush Coatings for Advanced Biomedical Applications. Polymers (Basel) 2022; 14:polym14194245. [PMID: 36236192 PMCID: PMC9571834 DOI: 10.3390/polym14194245] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/03/2022] [Accepted: 10/06/2022] [Indexed: 01/15/2023] Open
Abstract
Modern biomedical technologies predict the application of materials and devices that not only can comply effectively with specific requirements, but also enable remote control of their functions. One of the most prospective materials for these advanced biomedical applications are materials based on temperature-responsive polymer brush coatings (TRPBCs). In this review, methods for the fabrication and characterization of TRPBCs are summarized, and possibilities for their application, as well as the advantages and disadvantages of the TRPBCs, are presented in detail. Special attention is paid to the mechanisms of thermo-responsibility of the TRPBCs. Applications of TRPBCs for temperature-switchable bacteria killing, temperature-controlled protein adsorption, cell culture, and temperature-controlled adhesion/detachment of cells and tissues are considered. The specific criteria required for the desired biomedical applications of TRPBCs are presented and discussed.
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8
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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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9
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Wang C, Zhao P, Zhang L, Wang Y, Fu Q, Li R, Li J, Li C, Xie Y, Fei J. Switched electrochemical sensor for hydroquinone based on rGO@Au, monoclinic BiVO4 and temperature-sensitive polymer composite material. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Del Castillo GFD, Kyriakidou M, Adali Z, Xiong K, Hailes RLN, Dahlin A. Electrically Switchable Polymer Brushes for Protein Capture and Release in Biological Environments. Angew Chem Int Ed Engl 2022; 61:e202115745. [PMID: 35289480 PMCID: PMC9311814 DOI: 10.1002/anie.202115745] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Indexed: 12/25/2022]
Abstract
Interfaces functionalized with polymers are known for providing excellent resistance towards biomolecular adsorption and for their ability to bind high amounts of protein while preserving their structure. However, making an interface that switches between these two states has proven challenging and concepts to date rely on changes in the physiochemical environment, which is static in biological systems. Here we present the first interface that can be electrically switched between a high‐capacity (>1 μg cm−2) multilayer protein binding state and a completely non‐fouling state (no detectable adsorption). Switching is possible over multiple cycles without any regeneration. Importantly, switching works even when the interface is in direct contact with biological fluids and a buffered environment. The technology offers many applications such as zero fouling on demand, patterning or separation of proteins as well as controlled release of biologics in a physiological environment, showing high potential for future drug delivery in vivo.
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Affiliation(s)
| | - Maria Kyriakidou
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemigården 4, 41296, Göteborg, Sweden
| | - Zeynep Adali
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemigården 4, 41296, Göteborg, Sweden
| | - Kunli Xiong
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemigården 4, 41296, Göteborg, Sweden
| | - Rebekah L N Hailes
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemigården 4, 41296, Göteborg, Sweden
| | - Andreas Dahlin
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemigården 4, 41296, Göteborg, Sweden
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11
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Kim BI, Boehm RD, Agrusa H. Coil-to-Bridge Transitions of Self-Assembled Water Chains Observed in a Nanoscopic Meniscus. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4538-4546. [PMID: 35394791 PMCID: PMC9022434 DOI: 10.1021/acs.langmuir.1c03100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 03/27/2022] [Indexed: 06/14/2023]
Abstract
Ten downward portions in the large oscillatory force-distance curve reported earlier are analyzed to understand a nanoscale water meniscus confined between a sharp probe and a flat substrate in air. The sigmoidal shape of each portion leads to the assumption that the meniscus is made up of n independent transitions of two states: one for a coil state and the other for a bridge state. The analysis reveals that each downward portion occurs due to a coil-to-bridge transition of n self-assembled water chains whose length ranges between 197 and 383 chain units. The transition provides novel insights into water's unique properties like high surface tension and the long-range condensation distances.
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12
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Castillo GF, Kyriakidou M, Adali Z, Xiong K, Hailes RLN, Dahlin A. Electrically Switchable Polymer Brushes for Protein Capture and Release in Biological Environments**. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gustav Ferrand‐Drake Castillo
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Kemigården 4 41296 Göteborg Sweden
| | - Maria Kyriakidou
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Kemigården 4 41296 Göteborg Sweden
| | - Zeynep Adali
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Kemigården 4 41296 Göteborg Sweden
| | - Kunli Xiong
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Kemigården 4 41296 Göteborg Sweden
| | - Rebekah L. N. Hailes
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Kemigården 4 41296 Göteborg Sweden
| | - Andreas Dahlin
- Department of Chemistry and Chemical Engineering Chalmers University of Technology Kemigården 4 41296 Göteborg Sweden
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13
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Khandelwal A, Athreya N, Tu MQ, Janavicius LL, Yang Z, Milenkovic O, Leburton JP, Schroeder CM, Li X. Self-assembled microtubular electrodes for on-chip low-voltage electrophoretic manipulation of charged particles and macromolecules. MICROSYSTEMS & NANOENGINEERING 2022; 8:27. [PMID: 35310513 PMCID: PMC8882674 DOI: 10.1038/s41378-022-00354-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 01/05/2022] [Accepted: 01/09/2022] [Indexed: 06/14/2023]
Abstract
On-chip manipulation of charged particles using electrophoresis or electroosmosis is widely used for many applications, including optofluidic sensing, bioanalysis and macromolecular data storage. We hereby demonstrate a technique for the capture, localization, and release of charged particles and DNA molecules in an aqueous solution using tubular structures enabled by a strain-induced self-rolled-up nanomembrane (S-RuM) platform. Cuffed-in 3D electrodes that are embedded in cylindrical S-RuM structures and biased by a constant DC voltage are used to provide a uniform electrical field inside the microtubular devices. Efficient charged-particle manipulation is achieved at a bias voltage of <2-4 V, which is ~3 orders of magnitude lower than the required potential in traditional DC electrophoretic devices. Furthermore, Poisson-Boltzmann multiphysics simulation validates the feasibility and advantage of our microtubular charge manipulation devices over planar and other 3D variations of microfluidic devices. This work lays the foundation for on-chip DNA manipulation for data storage applications.
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Affiliation(s)
- Apratim Khandelwal
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
- Nick Holonyak Micro and Nanotechnology Laboratory, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
| | - Nagendra Athreya
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
- Nick Holonyak Micro and Nanotechnology Laboratory, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
| | - Michael Q. Tu
- Department of Chemical Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
| | - Lukas L. Janavicius
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
- Nick Holonyak Micro and Nanotechnology Laboratory, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
| | - Zhendong Yang
- Department of Electrical and Computer Engineering, Microelectronics Research Center, University of Texas, Austin, TX 78758 USA
| | - Olgica Milenkovic
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
- Coordinated Science Laboratory, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
| | - Jean-Pierre Leburton
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
- Nick Holonyak Micro and Nanotechnology Laboratory, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
| | - Charles M. Schroeder
- Department of Chemical Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
| | - Xiuling Li
- Department of Electrical and Computer Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
- Nick Holonyak Micro and Nanotechnology Laboratory, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL 61801 USA
- Department of Electrical and Computer Engineering, Microelectronics Research Center, University of Texas, Austin, TX 78758 USA
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14
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Chen Y, Chen Y, Shi W, Hu S, Huang Q, Liu GS, Shi J, Chen L, Azeman NH, Ashrif A Bakar A, Luo Y, Chen Z. MoS 2-nanoflower enhanced programmable adsorption/desorption plasmonic detection for bipolar-molecules with high sensitivity. Biosens Bioelectron 2022; 198:113787. [PMID: 34864241 DOI: 10.1016/j.bios.2021.113787] [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: 03/08/2021] [Revised: 10/22/2021] [Accepted: 11/11/2021] [Indexed: 11/28/2022]
Abstract
High sensitivity and capturing ratio are strongly demanded for surface plasmon resonance (SPR) sensors when applied in detection of small molecules. Herein, an SPR sensor is combined with a novel smart material, namely, MoS2 nanoflowers (MNFs), to demonstrate programmable adsorption/desorption of small bipolar molecules, i.e., amino acids. The MNFs overcoated on the plasmonic gold layer increase the sensitivity by 25% compared to an unmodified SPR sensor, because of the electric field enhancement at the gold surface. Furthermore, as the MNFs have rich edge sites and negatively charged surfaces, the MNF-SPR sensors exhibit not only much higher bipolar-molecule adsorption capability, but also efficient desorption of these molecules. It is demonstrated that the MNF-SPR sensors enable controllable detection of amino acids by adjusting solution pH according to their isoelectric points. In addition, the MNFs decorated on the plasmonic interface can be as nanostructure frameworks and modified with antibody, which allows for specific detection of proteins. This novel SPR sensor provides a new simple strategy for pre-screening of amino acid disorders in blood plasma and a universal high-sensitive platform for immunoassay.
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Affiliation(s)
- Yu Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communication Technology, Department of Optoelectronic Engineering, College of Science and Engineering, Jinan University, Guangzhou, 510632, China
| | - Yaofei Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communication Technology, Department of Optoelectronic Engineering, College of Science and Engineering, Jinan University, Guangzhou, 510632, China
| | - Weicheng Shi
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communication Technology, Department of Optoelectronic Engineering, College of Science and Engineering, Jinan University, Guangzhou, 510632, China
| | - Shiqi Hu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communication Technology, Department of Optoelectronic Engineering, College of Science and Engineering, Jinan University, Guangzhou, 510632, China
| | - Qizhang Huang
- School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Gui-Shi Liu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communication Technology, Department of Optoelectronic Engineering, College of Science and Engineering, Jinan University, Guangzhou, 510632, China.
| | - Jifu Shi
- Siyuan Laboratory, Department of Physics, Jinan University, Guangzhou , 510632, China.
| | - Lei Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communication Technology, Department of Optoelectronic Engineering, College of Science and Engineering, Jinan University, Guangzhou, 510632, China
| | - Nur Hidayah Azeman
- Photonics Technology Laboratory, Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia
| | - Ahmad Ashrif A Bakar
- Photonics Technology Laboratory, Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia
| | - Yunhan Luo
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communication Technology, Department of Optoelectronic Engineering, College of Science and Engineering, Jinan University, Guangzhou, 510632, China.
| | - Zhe Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communication Technology, Department of Optoelectronic Engineering, College of Science and Engineering, Jinan University, Guangzhou, 510632, China
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15
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Badiye A, Kapoor N, Shukla RK. Detection and separation of proteins using micro/nanofluidics devices. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2022; 186:59-84. [PMID: 35033290 DOI: 10.1016/bs.pmbts.2021.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Microfluidics is the technology or system wherein the behavior of fluids' is studied onto a miniaturized device composed of chambers and tunnels. In biological and biomedical sciences, microfluidic technology/system or device serves as an ultra-high-output approach capable of detecting and separating the biomolecules present even in trace quantities. Given the essential role of protein, the identification and quantification of proteins help understand the various living systems' biological function regulation. Microfluidics has enormous potential to enable biological investigation at the cellular and molecular level and maybe a fair substitution of the sophisticated instruments/equipment used for proteomics, genomics, and metabolomics analysis. The current advancement in microfluidic systems' development is achieving momentum and opening new avenues in developing innovative and hybrid methodologies/technologies. This chapter attempts to expound the micro/nanofluidic systems/devices for their wide-ranging application to detect and separate protein. It covers microfluidic chip electrophoresis, microchip gel electrophoresis, and nanofluidic systems as protein separation systems, while methods such as spectrophotometric, mass spectrometry, electrochemical detection, magneto-resistive sensors and dynamic light scattering (DLS) are discussed as proteins' detection system.
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Affiliation(s)
- Ashish Badiye
- Department of Forensic Science, Government Institute of Forensic Sciences, Nagpur, Maharashtra, India
| | - Neeti Kapoor
- Department of Forensic Science, Government Institute of Forensic Sciences, Nagpur, Maharashtra, India
| | - Ritesh K Shukla
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Ahmedabad, Gujarat, India.
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16
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NIR-Laser Triggered Drug Release from Molybdenum Disulfide Nanosheets Modified with Thermosensitive Polymer for Prostate Cancer Treatment. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-02075-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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17
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Anthi J, Kolivoška V, Holubová B, Vaisocherová-Lísalová H. Probing polymer brushes with electrochemical impedance spectroscopy: a mini review. Biomater Sci 2021; 9:7379-7391. [PMID: 34693954 DOI: 10.1039/d1bm01330k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Polymer brushes are frequently used as surface-tethered antifouling layers in biosensors to improve sensor surface-analyte recognition in the presence of abundant non-target molecules in complex biological samples by suppressing nonspecific interactions. However, because brushes are complex systems highly responsive to changes in their surrounding environment, studying their properties remains a challenge. Electrochemical impedance spectroscopy (EIS) is an emerging method in this context. In this mini review, we aim to elucidate the potential of EIS for investigating the physicochemical properties and structural aspects of polymer brushes. The application of EIS in brush-based biosensors is also discussed. Most common principles employed in these biosensors are presented, as well as interpretation of EIS data obtained in such setups. Overall, we demonstrate that the EIS-polymer brush pairing has a considerable potential for providing new insights into brush functionalities and designing highly sensitive and specific biosensors.
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Affiliation(s)
- Judita Anthi
- Institute of Physics of the CAS, Na Slovance 2, 182 21 Prague, Czech Republic. .,Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 16628 Prague, Czech Republic
| | - Viliam Kolivoška
- J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 182 23 Prague, Czech Republic.
| | - Barbora Holubová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 3, 16628 Prague, Czech Republic
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18
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Mora-Sierra Z, Gopan G, Chang R, Leckband DE, Gruebele M. Stabilization and Kinetics of an Adsorbed Protein Depends on the Poly( N-isopropylacrylamide) Grafting Density. Biomacromolecules 2021; 22:4470-4478. [PMID: 34606244 DOI: 10.1021/acs.biomac.1c00417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The solubility transition at the lower critical solution temperature (LCST, 32 °C) of poly(N-isopropylacrylamide) (PNIPAM) is widely used as a thermal switch to rapidly and reversibly capture and release proteins and cells. It is generally assumed that proteins adsorbed to PNIPAM above the LCST are unaffected by polymer interactions. Here we show that the folding stability of the enzyme phosphoglycerate kinase (PGK) is increased by interactions with end-grafted PNIPAM films above the LCST. We systematically compare two protein mutants with different stabilities. The stabilization mirrors the degree of protein adsorption under grafting conditions studied previously. Maximum stabilization occurs when proteins adsorb to low density, collapsed polymer "mushrooms". In the denser polymer "brush" regime, protein stabilization decreases back to a value indistinguishable from the bulk solution, consistent with low protein adsorption on dense, collapsed brushes. The temperature-dependent kinetics measured by Fast Relaxation Imaging reveals that PNIPAM does not affect the overall folding/unfolding mechanism. Based on the different stabilizations of two mutants and the relaxation kinetics, we hypothesize that the polymer acts mainly by increasing the conformational entropy of the folded protein by interacting with the protein surface and less by crowding the unfolded state of PGK.
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19
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Shakeri A, Khan S, Didar TF. Conventional and emerging strategies for the fabrication and functionalization of PDMS-based microfluidic devices. LAB ON A CHIP 2021; 21:3053-3075. [PMID: 34286800 DOI: 10.1039/d1lc00288k] [Citation(s) in RCA: 86] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Microfluidics is an emerging and multidisciplinary field that is of great interest to manufacturers in medicine, biotechnology, and chemistry, as it provides unique tools for the development of point-of-care diagnostics, organs-on-chip systems, and biosensors. Polymeric microfluidics, unlike glass and silicon, offer several advantages such as low-cost mass manufacturing and a wide range of beneficial material properties, which make them the material of choice for commercial applications and high-throughput systems. Among polymers used for the fabrication of microfluidic devices, polydimethylsiloxane (PDMS) still remains the most widely used material in academia due to its advantageous properties, such as excellent transparency and biocompatibility. However, commercialization of PDMS has been a challenge mostly due to the high cost of the current fabrication strategies. Moreover, specific surface modification and functionalization steps are required to tailor the surface chemistry of PDMS channels (e.g. biomolecule immobilization, surface hydrophobicity and antifouling properties) with respect to the desired application. While significant research has been reported in the field of PDMS microfluidics, functionalization of PDMS surfaces remains a critical step in the fabrication process that is difficult to navigate. This review first offers a thorough illustration of existing fabrication methods for PDMS-based microfluidic devices, providing several recent advancements in this field with the aim of reducing the cost and time for mass production of these devices. Next, various conventional and emerging approaches for engineering the surface chemistry of PDMS are discussed in detail. We provide a wide range of functionalization techniques rendering PDMS microchannels highly biocompatible for physical or covalent immobilization of various biological entities while preventing non-specific interactions.
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Affiliation(s)
- Amid Shakeri
- Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, Canada.
| | - Shadman Khan
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada
| | - Tohid F Didar
- Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, Canada.
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada
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20
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Zhang Y, Zhou N. Electrochemical Biosensors Based on Micro‐fabricated Devices for Point‐of‐Care Testing: A Review. ELECTROANAL 2021. [DOI: 10.1002/elan.202100281] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yuting Zhang
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of Education School of Biotechnology Jiangnan University Wuxi 214122 China
| | - Nandi Zhou
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of Education School of Biotechnology Jiangnan University Wuxi 214122 China
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21
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Cirillo AI, Tomaiuolo G, Guido S. Membrane Fouling Phenomena in Microfluidic Systems: From Technical Challenges to Scientific Opportunities. MICROMACHINES 2021; 12:820. [PMID: 34357230 PMCID: PMC8305447 DOI: 10.3390/mi12070820] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/08/2021] [Accepted: 07/09/2021] [Indexed: 12/13/2022]
Abstract
The almost ubiquitous, though undesired, deposition and accumulation of suspended/dissolved matter on solid surfaces, known as fouling, represents a crucial issue strongly affecting the efficiency and sustainability of micro-scale reactors. Fouling becomes even more detrimental for all the applications that require the use of membrane separation units. As a matter of fact, membrane technology is a key route towards process intensification, having the potential to replace conventional separation procedures, with significant energy savings and reduced environmental impact, in a broad range of applications, from water purification to food and pharmaceutical industries. Despite all the research efforts so far, fouling still represents an unsolved problem. The complex interplay of physical and chemical mechanisms governing its evolution is indeed yet to be fully unraveled and the role played by foulants' properties or operating conditions is an area of active research where microfluidics can play a fundamental role. The aim of this review is to explore fouling through microfluidic systems, assessing the fundamental interactions involved and how microfluidics enables the comprehension of the mechanisms characterizing the process. The main mathematical models describing the fouling stages will also be reviewed and their limitations discussed. Finally, the principal dynamic investigation techniques in which microfluidics represents a key tool will be discussed, analyzing their employment to study fouling.
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Affiliation(s)
- Andrea Iginio Cirillo
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, University of Naples Federico, 80125 Naples, Italy; (A.I.C.); (S.G.)
- CEINGE Advanced Biotechnologies, 80131 Naples, Italy
| | - Giovanna Tomaiuolo
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, University of Naples Federico, 80125 Naples, Italy; (A.I.C.); (S.G.)
- CEINGE Advanced Biotechnologies, 80131 Naples, Italy
| | - Stefano Guido
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, University of Naples Federico, 80125 Naples, Italy; (A.I.C.); (S.G.)
- CEINGE Advanced Biotechnologies, 80131 Naples, Italy
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22
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Pan F, Amarjargal A, Altenried S, Liu M, Zuber F, Zeng Z, Rossi RM, Maniura-Weber K, Ren Q. Bioresponsive Hybrid Nanofibers Enable Controlled Drug Delivery through Glass Transition Switching at Physiological Temperature. ACS APPLIED BIO MATERIALS 2021; 4:4271-4279. [PMID: 35006839 DOI: 10.1021/acsabm.1c00099] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
To avoid excessive usage of antibiotics and antimicrobial agents, smart wound dressings permitting controlled drug release for treatment of bacterial infections are highly desired. In search of a sensitive stimulus to activate drug release under physiological conditions, we found that the glass transition temperature (Tg) of a polymer or polymer blend can be an ideal parameter because a thermal stimulus can regulate drug release at the physiological temperature of 37 °C. A well-tuned Tg for a controlled drug release from fibers at 37 °C was achieved by varying the blending ratio of Eudragit® RS 100 and poly(methyl methacrylate). Octenidine, an antimicrobial agent often used in wound treatment, was encapsulated into the polymer blend during the electrospinning process and evaluated for its controlled release based on modulation of temperature. The thermal switch of the nanofibrous membranes can be turned "on" at physiological temperature (37 °C) and "off" at room temperature (25 °C), conferring a controlled release of octenidine. It was found that octenidine can be released in an amount at least 8.5 times higher (25 mg·L-1) during the "on" stage compared to the "off" stage after 24 h, which was regulated by the wet Tg (34.8-36.5 °C). The "on"/"off" switch for controlled drug release can moreover be repeated at least 5 times. Furthermore, the fabricated nanofibrous membranes displayed a distinctive antibacterial activity, causing a log3 reduction of the viable cells for both Gram negative and positive pathogens at 37 °C, when the thermal switch was "on". This study forms the groundwork for a treatment concept where no external stimulus is needed for the release of antimicrobials at physiological conditions, and will help reduce the overuse of antibiotics by allowing controlled drug release.
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Affiliation(s)
- Fei Pan
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biointerfaces, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - Altangerel Amarjargal
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland.,Power Engineering School, Mongolian University of Science and Technology, Baga Toiruu 34, 14191 Ulaanbaatar, Mongolia
| | - Stefanie Altenried
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biointerfaces, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - Mengdi Liu
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biointerfaces, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland.,Department of Earth- and Environmental Sciences, Ludwig Maximilian University of Munich, Theresienstrasse 41, 80333 Munich, Germany
| | - Flavia Zuber
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biointerfaces, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - Zhihui Zeng
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Cellulose & Wood Materials, Ueberlandstrasse 129, 8600 Duebendorf, Switzerland
| | - René M Rossi
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - Katharina Maniura-Weber
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biointerfaces, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - Qun Ren
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biointerfaces, Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
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23
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Schwaminger S, Rottmueller ME, Fischl R, Kalali B, Berensmeier S. Detection of targeted bacteria species on filtration membranes. Analyst 2021; 146:3549-3556. [PMID: 33899848 DOI: 10.1039/d1an00117e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The detection of pathogens in aquatic environments issues a time-consuming challenge, but it is an essential task to prevent the spread of diseases. We have developed a new point-of-care (POC) method for the fast and efficient detection of Legionella pneumophila in water. The method consists first of the generation of immunocomplexes of bacteria species with its corresponding targeted fluorescence-labelled serogroup-specific antibodies, and second a concentration step of pathogens with a membrane filter. Third, on the filtration membrane, our method can detect the fluorescence intensity corresponding to the pathogen concentration. Thus selective and efficient evidence for the presence of bacteria can be evaluated. We tested our system on fluorescent Escherichia coli bacteria and were able to reach an accurate determination of 1000 cells. The technique was furthermore tested on Legionella pneumophila cells, which were labelled with fluorescence-labelled antibodies as a proof of principle. Furthermore, we were able to verify this method in the presence of other bacteria species. We were able to detect bacteria cells within half an hour, a substantial advancement compared to the prevailling state of the art detection method based on the cultivation of Legionella pneumophila. Hence, this system represents the basis for future developments in analysis of pathogens.
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Affiliation(s)
- Sebastian Schwaminger
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748 Garching, Germany.
| | - Marina E Rottmueller
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748 Garching, Germany.
| | - Ramona Fischl
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748 Garching, Germany.
| | - Behnam Kalali
- Institute of Medical Microbiology, Immunology and Hygiene, Technical University of Munich, Munich, Germany
| | - Sonja Berensmeier
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748 Garching, Germany.
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24
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Saha LC, Kikugawa G. Heat Conduction Performance over a Poly(ethylene glycol) Self-Assembled Monolayer/Water Interface: A Molecular Dynamics Study. J Phys Chem B 2021; 125:1896-1905. [PMID: 33569956 DOI: 10.1021/acs.jpcb.0c09385] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This study examined the interfacial heat condition between a poly(ethylene glycol) (PEG) self-assembled monolayer (SAM) and water using molecular dynamics simulation. It was found that the PEG SAM has higher thermal boundary conductance (TBC) than the traditionally used alkane-based SAM. The TBC conditionally varied with the length of the PEG molecules, where interfacial thermal resistance was a key factor. Our results reveal that the TBC of the PEG SAM/water interface is greatly influenced by its structural properties rather than the matching of vibrational properties between the SAM terminal and water. The structural analysis shows that the water structure around the terminal oxygen atom of the SAM plays a vital role in controlling the TBC. In this study, the concept of free volume has also been exploited, and the result suggests that the reduction of the free volume fraction accommodates a higher TBC. The model was precisely validated against experimental data by calculating the tilt angle and dihedral angle of the PEG SAM, the persistence length of the PEG chain in the water medium, and the sulfur position of the PEG SAM headgroup on the gold surface using quantitative scanning transmission electron microscopy image simulation.
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Affiliation(s)
- Leton C Saha
- Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Gota Kikugawa
- Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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25
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Yang Y, Li Y, Zhai W, Li X, Li D, Lin H, Han S. Electrokinetic Preseparation and Molecularly Imprinted Trapping for Highly Selective SERS Detection of Charged Phthalate Plasticizers. Anal Chem 2021; 93:946-955. [PMID: 33206502 DOI: 10.1021/acs.analchem.0c03652] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Nonspecific binding and weak spectral discernment are the main challenges for surface-enhanced Raman scattering (SERS) detection, especially in real sample analysis. Herein, molecularly imprinted polymer (MIP)-based core-shell AuNP@polydopamine (AuNP@PDA-MIP) nanoparticles (NPs) are designed and immobilized on an electrochemically reduced MoS2-modified screen-printed electrode (SPE). This portable electrochemical-Raman interface offers the dual functions of electrokinetic preseparation (EP) and MIP trapping of charged molecules so that a reliable SERS recognition with molecular selectivity and high sensitivity can be achieved. Core-shell AuNP@PDA-MIP NPs can be controllably synthesized, possess predesigned specific recognition, and provide "hot spots" at the junction of NPs. The introduction of an electric field enables the autonomous exclusion and separation of similarly charged molecules as well as attraction and concentration of the oppositely charged molecules by electrostatic attraction. Subsequently, the specific MIP recognition cavities allow selective adsorption of targets on the interface without the interference of analogues. Owing to the distinctive design of the multiple coupling separation, trapping, and enrichment strategies, the MIP-based SERS-active interface can be used for label-free detection of charged molecules in real samples without pretreatment. As a proof-of-concept study, label-free SERS detection of charged phthalate plasticizers (PAEs) was demonstrated with a detection limit as low as 2.7 × 10-12 M for dimethyl phthalate (DMP) and 2.3 × 10-11 M for di(2-ethylhexyl) phthalate (DEHP). This sensing strategy for in situ SERS analysis of charged pollutants or toxins holds vast promises for a wide range of in-field applications.
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Affiliation(s)
- Yuanyuan Yang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, People's Republic of China
| | - Yuanting Li
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, People's Republic of China
| | - Wenlei Zhai
- Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agricultural and Forestry Science, No. 9 Middle Road of Shuguanghuayuan, Haidian District, Beijing 100097, People's Republic of China
| | - Xuejian Li
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, People's Republic of China
| | - Dan Li
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, People's Republic of China
| | - Hualin Lin
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, People's Republic of China
| | - Sheng Han
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, People's Republic of China
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26
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Yan M, Wu Y, Zhang K, Lin R, Jia S, Lu J, Xing W. Multifunctional-imprinted nanocomposite membranes with thermo-responsive biocompatibility for selective/controllable recognition and separation application. J Colloid Interface Sci 2021; 582:991-1002. [PMID: 32942069 DOI: 10.1016/j.jcis.2020.08.108] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/06/2020] [Accepted: 08/26/2020] [Indexed: 01/09/2023]
Abstract
Inspired by the biomimetic modification strategy of dopamine self-polymerization technique, molecularly imprinted nanocomposite membranes (MINCMs) with thermo-responsive rebinding and separation performance were synthesized and evaluated. Herein, the Au/SiO2-based multilevel structure had been successfully obtained onto the polydopamine (pDA) modified membrane surfaces. Afterward, the poly(N-isopropylacrylamide)-based biomolecule-imprinted sites were adequately constructed by developing a photoinitiated atom transfer radical polymerization (pATRP) imprinting strategy using the high-biocompatible ovalbumin (Ova, pI 4.6) as template molecule. Therefore, thermo-responsive 'specific recognition sites' toward Ova were then achieved on the as-prepared MINCMs after the well-designed imprinting process. When the external temperature was set at 37 °C, excellent ovalbumin rebinding capacity (33.26 mg/g), selectivity factor (3.06) and structural stability were obtained. Importantly, as to the controllable biocompatibility research of this work, the bare glass and Ova-bound-MINCMs (the MINCMs were bound with Ova) showed basically the same cell adhesion behaviors and viability, indicating the excellent biocompatibility of the Ova-bound-MINCMs. Additionally, efficient and rapid regulation of cell adhesion/detachment on ovalbumin-bound MINCMs could be still obtained even after 10 cycles of temperature-switch process, which indicated that the as-prepared MINCMs had strong ability to work under high intensity and long continuous operation.
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Affiliation(s)
- Ming Yan
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Yilin Wu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
| | - Kaicheng Zhang
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China; College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, PR China
| | - Rongxin Lin
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Shuhan Jia
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China; College of Chemistry, Jilin Normal University, Siping 136000, PR China
| | - Jian Lu
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Wendong Xing
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
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Salehzadeh H. Tunable oxidative release of N-acetyl-p-benzoquinone-imine and acetamide from electrochemically derived sub-monolayer acetaminophen modified glassy carbon electrode. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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28
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Zhong W, Hou W, Liu Y, Liu L, Zhao H. Biosurfaces Fabricated by Polymerization-Induced Surface Self-Assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:12649-12657. [PMID: 33070609 DOI: 10.1021/acs.langmuir.0c02201] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Surface biofunctionalization provides an approach to the fabrication of surfaces with improved biological and clinical performances. Biosurfaces have found increasing applications in many areas such as sensing, cell growth, and disease detection. Efficient synthesis of biosurfaces without damages to the structures and functionalities of biomolecules is a great challenge. Polymerization-induced surface self-assembly (PISSA) provides an effective approach to the synthesis of surface nanostructures with different compositions, morphologies, and properties. In this research, application of PISSA in the fabrication of biosurfaces is investigated. Two different reversible addition-fragmentation chain transfer (RAFT) agents, RAFT chain transfer agent (CTA) on silica particles (SiO2-CTA) and CTA on bovine serum albumin (BSA-CTA), were employed in RAFT dispersion polymerization of N-isopropylacrylamide (NIPAM) in water at a temperature above the lower critical solution temperature (LCST) of poly-(isopropylacrylamide) (PNIPAM). After polymerization, PNIPAM layers with BSA on the top surfaces are fabricated on the surfaces of silica particles. Transmission electron microscopy results show that the average PNIPAM layer thickness increases with monomer conversion. Kinetics study indicates that there is a turn point on a plot of ln([M]0/[M]t) versus polymerization time. After the critical point, surface coassembly of PNIPAM brushes and BSA-PNIPAM bioconjugates is performed on the silica particles. The secondary structure and the activity of BSA immobilized on top of the PNIPAM layers are basically kept unchanged in the PISSA process. To prepare permanently immobilized protein surfaces, PNIPAM layers on silica particles are cross-linked. BSA on the top surfaces presents a reversible "on-off" switching property. At a temperature below the LCST of PNIPAM, the activity of the immobilized BSA is retained; however, the BSA activity decreases significantly at a temperature above the LCST because of the hydrophobic interaction between PNIPAM and BSA. Based on this approach, many different biosurfaces can be fabricated and the materials will find applications in many fields, such as enzyme immobilization, drug delivery, and tissue engineering.
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Affiliation(s)
- Wen Zhong
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Wangmeng Hou
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Yingze Liu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Li Liu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
| | - Hanying Zhao
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
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29
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Castro N, Ribeiro S, Fernandes MM, Ribeiro C, Cardoso V, Correia V, Minguez R, Lanceros‐Mendez S. Physically Active Bioreactors for Tissue Engineering Applications. ACTA ACUST UNITED AC 2020; 4:e2000125. [DOI: 10.1002/adbi.202000125] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 07/15/2020] [Indexed: 01/09/2023]
Affiliation(s)
- N. Castro
- BCMaterials, Basque Centre for Materials, Applications and Nanostructures University of the Basque Country UPV/EHU Science Park Leioa E‐48940 Spain
| | - S. Ribeiro
- Physics Centre University of Minho Campus de Gualtar Braga 4710‐057 Portugal
- Centre of Molecular and Environmental Biology (CBMA) University of Minho Campus de Gualtar Braga 4710‐057 Portugal
| | - M. M. Fernandes
- Physics Centre University of Minho Campus de Gualtar Braga 4710‐057 Portugal
- CEB – Centre of Biological Engineering University of Minho Braga 4710‐057 Portugal
| | - C. Ribeiro
- Physics Centre University of Minho Campus de Gualtar Braga 4710‐057 Portugal
- CEB – Centre of Biological Engineering University of Minho Braga 4710‐057 Portugal
| | - V. Cardoso
- CMEMS‐UMinho Universidade do Minho Campus de Azurém Guimarães 4800‐058 Portugal
| | - V. Correia
- Algoritmi Research Centre University of Minho Campus de Azurém Guimarães 4800‐058 Portugal
| | - R. Minguez
- Department of Graphic Design and Engineering Projects University of the Basque Country UPV/EHU Bilbao E‐48013 Spain
| | - S. Lanceros‐Mendez
- BCMaterials, Basque Centre for Materials, Applications and Nanostructures University of the Basque Country UPV/EHU Science Park Leioa E‐48940 Spain
- IKERBASQUE Basque Foundation for Science Bilbao E‐48013 Spain
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30
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Ferrand-Drake Del Castillo G, Hailes RLN, Adali-Kaya Z, Robson T, Dahlin A. Generic high-capacity protein capture and release by pH control. Chem Commun (Camb) 2020; 56:5889-5892. [PMID: 32373823 DOI: 10.1039/d0cc01250e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Techniques for immobilization and release of proteins are of general interest but challenging to develop. Here we show a new method for high-capacity (several μg cm-2) immobilization of proteins in polyelectrolyte brushes by multivalent hydrogen bonds. Upon increasing pH, the proteins are fully released with preserved structure and activity.
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31
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Mahmoud AM, Morrow JP, Pizzi D, Nanayakkara S, Davis TP, Saito K, Kempe K. Nonionic Water-Soluble and Cytocompatible Poly(amide acrylate)s. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02267] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ayaat M. Mahmoud
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Joshua P. Morrow
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - David Pizzi
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Sepa Nanayakkara
- School of Chemistry, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Thomas P. Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Kei Saito
- School of Chemistry, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Kristian Kempe
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
- Materials Science and Engineering, Monash University, Clayton, VIC 3800, Australia
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32
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Efe-Sanden G, Gallant N, Alcantar N, Toomey R. Adhesion and Particle Removal from Surface-Tethered Poly( N-Isopropylacrylamide) Coatings Using Hydrodynamic Shear Forces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:15751-15758. [PMID: 31656077 DOI: 10.1021/acs.langmuir.9b02625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Thermally responsive coatings of poly(N-isopropylacrylamide), or poly(NIPAAm), have a volume phase transition temperature (VPTT) near 32 °C. Below this temperature, the coating imbibes water and swells. Above this temperature, the coating rejects water and collapses. Herein, a spinning disk method is used to determine the hydrodynamic shear stress necessary to remove 10 μm polystyrene (PS) microspheres capped with either carboxylic acid (COOH) functionality or immunoglobulin (IgG) proteins from the coatings as a function of coating thickness and temperature. In the case of the PS-COOH, the hydrodynamic shear stress necessary to remove the microspheres was consistently larger below the VPTT than above the VPTT of the poly(NIPAAm) coating. In the case of PS-IgG, the trend was reversed, in which the hydrodynamic shear stress necessary to remove the microspheres was consistently smaller below the VPTT than above the VPTT. Simple scaling relationships were developed to explain the findings within the Johnson-Kendall-Roberts (JKR) model of contact mechanics, which illustrates the delicate interplay between the pull-off force and contact radius (as determined by the coating shear modulus) in governing particle removal from soft surfaces with hydrodynamic forces.
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Affiliation(s)
- Gulnur Efe-Sanden
- Department of Chemical and Biomedical Engineering , University of South Florida , Tampa , Florida 33620 , United States
| | - Nathan Gallant
- Department of Mechanical Engineering , University of South Florida , Tampa , Florida 33620 , United States
| | - Norma Alcantar
- Department of Chemical and Biomedical Engineering , University of South Florida , Tampa , Florida 33620 , United States
| | - Ryan Toomey
- Department of Chemical and Biomedical Engineering , University of South Florida , Tampa , Florida 33620 , United States
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33
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Liu Y, Zhao L, Lin J, Yang S. Electrodeposited surfaces with reversibly switching interfacial properties. SCIENCE ADVANCES 2019; 5:eaax0380. [PMID: 31701000 PMCID: PMC6824854 DOI: 10.1126/sciadv.aax0380] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 09/16/2019] [Indexed: 05/16/2023]
Abstract
Engineered surfaces with reversibly switching interfacial properties, such as wettability and liquid repellency, are highly desirable in diverse application fields but are rare. We have developed a general concept to prepare metallic porous surfaces with exceptionally powerful wettability switch capabilities and liquid-repellent properties through an extremely simple one-step electrochemical deposition process. The wettability switch and manipulative liquid-repellent properties are enabled by orientation change of the dodecyl sulfate ions ionically bonded to the porous membranes during electrodeposition. The porous membrane with adjustable wettability enables it to trap different lubricants on demand within the pores to form liquid-infused porous surfaces with varied liquid-repellent properties. We have demonstrated the application of the (liquid-infused) porous membrane in encryption, controllable droplet transfer, and water harvesting. Moreover, the silver porous membrane can be coated onto a copper mesh, forming a smart antifouling liquid gate capable of allowing water or oil to pass through on request.
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Affiliation(s)
- Yue Liu
- Institute for Composites Science Innovation, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Liyan Zhao
- Institute for Composites Science Innovation, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Jianjian Lin
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Shikuan Yang
- Institute for Composites Science Innovation, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
- Corresponding author.
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34
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A review of electro-stimulated gels and their applications: Present state and future perspectives. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109852. [DOI: 10.1016/j.msec.2019.109852] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 05/21/2019] [Accepted: 06/01/2019] [Indexed: 12/20/2022]
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35
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Cai Y, Liu F, Ma X, Yang X, Zhao H. Hydrophobic Interaction-Induced Coassembly of Homopolymers and Proteins. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10958-10964. [PMID: 31355645 DOI: 10.1021/acs.langmuir.9b01749] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Studies on the fabrication of polymer-protein hybrid self-assemblies have aroused great interest over the past years because of a broad range of applications of the materials in drug/protein delivery, biosensors, and enhancement of protein stability. The hybrid assemblies are usually fabricated from polymer-protein bioconjugates, which may suffer from the damages to the protein structures and the loss of functionalities in the synthesis. Herein, we report a simple and efficient approach to the fabrication of vesicle-like structures based on coassembly of homopolymer chains and protein molecules. At room temperature, poly(N-isopropylacrylamide) (PNIPAM) and bovine serum albumin (BSA) are able to form complexes through hydrophobic interactions in aqueous solution. Upon heating to a temperature above the cloud point of PNIPAM, vesicle-like structures with collapsed PNIPAM in the walls and BSA at the surfaces are formed. The size and membrane thickness of the assemblies can be tuned by the molar ratio of PNIPAM to BSA. The hydrophobic interaction between PNIPAM and BSA plays a key role in the complex formation and self-assembly process. The complexes and assembled structures are analyzed by using micro differential scanning calorimetry, light scattering, and transmission electron microscopy. BSA in the assemblies retains over 90% of its activity, and the protein stability is enhanced because of the hydrophobic interaction between proteins and polymers. This approach allows us to prepare polymer-protein assemblies without bioconjugate synthesis. Meanwhile, possible damages to the protein structures and the loss of bioactivities of proteins can be avoided.
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36
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Zhang Q, Li D, Cao X, Gu H, Deng W. Self-Assembled Microgels Arrays for Electrostatic Concentration and Surface-Enhanced Raman Spectroscopy Detection of Charged Pesticides in Seawater. Anal Chem 2019; 91:11192-11199. [DOI: 10.1021/acs.analchem.9b02106] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Qinmei Zhang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, P.R. China
| | - Dan Li
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, P.R. China
| | - Xiukai Cao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, P.R. China
| | - Haixin Gu
- Shanghai Fire Research Institute of MEM, 918 Minjing Road, Shanghai 200438, P.R. China
| | - Wei Deng
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, P.R. China
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37
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Li J, Sun CL, An P, Liu X, Dong R, Sun J, Zhang X, Xie Y, Qin C, Zheng W, Zhang HL, Jiang X. Construction of Dopamine-Releasing Gold Surfaces Mimicking Presynaptic Membrane by On-Chip Electrochemistry. J Am Chem Soc 2019; 141:8816-8824. [PMID: 31117642 DOI: 10.1021/jacs.9b01003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a strategy to construct a dopamine-releasing gold surface mimicking a presynaptic membrane on a microfluidic chip to simulate in vivo neural signaling. We constructed dopamine self-assembled monolayers (DA SAMs) by electrochemical deprotection of methyl group-protected DA SAMs on a gold surface. Electrochemically controllable release of DA SAMs can be realized by applying nonhydrolytic negative potential on the gold surface. Our method in constructing DA SAMs avoids the polymerization and protonation of DA molecules which may lead to the failure of the DA SAM formation. By combining microfluidics, we realized spatial and temporal controllable release of DA by electrochemistry from the gold surface. Furthermore, by culturing neurons on the patterned DA SAMs, the interface between the DA SAMs and the neurons could serve as a presynaptic membrane, and the spatiotemporal release of DA could modulate the neuron activity with high precision. Our study holds great promise in the fields of neurobiology research and drug screening.
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Affiliation(s)
- Jun Li
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Chun-Lin Sun
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , P. R. China
| | - Pengrong An
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Xiaoyan Liu
- CAS Center for Excellence in Nanoscience, CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety , National Center for NanoScience and Technology , Beijing 100190 , P. R. China
| | - Ruihua Dong
- CAS Center for Excellence in Nanoscience, CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety , National Center for NanoScience and Technology , Beijing 100190 , P. R. China
| | - Jinghong Sun
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Xingyu Zhang
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Yanbo Xie
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Chuanguang Qin
- MOE Key Laboratory of Space Applied Physics and Chemistry, Joint Lab of Nanofluidics and Interfaces (LONI), School of Natural and Applied Sciences , Northwestern Polytechnical University , Xi'an , Shanxi 710072 , P. R. China
| | - Wenfu Zheng
- CAS Center for Excellence in Nanoscience, CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety , National Center for NanoScience and Technology , Beijing 100190 , P. R. China
| | - Hao-Li Zhang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , P. R. China
| | - Xingyu Jiang
- Department of Biomedical Engineering , Southern University of Science and Technology , No. 1088 Xueyuan Rd, Nanshan District , Shenzhen , Guangdong 518055 , P. R. China.,CAS Center for Excellence in Nanoscience, CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety , National Center for NanoScience and Technology , Beijing 100190 , P. R. China
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38
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Abstract
This review describes available smart biomaterials for biomedical applications. Biomaterials have gained special attention because of their characteristics, along with biocompatibility, biodegradability, renewability, and inexpensiveness. In addition, they are also sensitive towards various stimuli such as temperature, light, magnetic, electro, pH and can respond to two or more stimuli at the same time. In this manuscript, the suitability of stimuli-responsive smart polymers was examined, providing examples of its usefulness in the biomedical applications.
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Almouse R, Wen X, Na S, Anderson G, Xie D. Polyvinylchloride surface with enhanced cell/bacterial adhesion-resistant and antibacterial functions. J Biomater Appl 2019; 33:1415-1426. [DOI: 10.1177/0885328219834680] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This study reports synthesis and attachment of a novel antibacterial and hydrophilic polymer onto a polyvinylchloride surface via a simple and mild surface coating technique. The compound 3,4-dichloro-5-hydroxy-2(5H)-furanone was derivatized and copolymerized with N-vinylpyrrolidone. The copolymer was then covalently coated onto polyvinylchloride surface. 3T3 mouse fibroblast cells and bacterium Pseudomonas aeruginosa were used to evaluate surface adhesion and antibacterial activity. Results showed that the polymer-modified polyvinylchloride surface not only exhibited significantly decreased 3T3 fibroblast cell adhesion with a 64–84% reduction but also demonstrated significantly decreased P. aeruginosa adhesion with a 65–84% reduction, as compared to unmodified polyvinylchloride. Furthermore, the modified polyvinylchloride surfaces exhibited significant antibacterial functions by inhibiting P. aeruginosa growth with a 58–80% reduction and killing bacteria, as compared to unmodified polyvinylchloride. These results demonstrate that covalent polymer attachment conferred cell/bacterial adhesion-resistant and antibacterial properties to the polyvinylchloride surface.
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Affiliation(s)
- Rashed Almouse
- Department of Biomedical Engineering, Purdue School of Engineering and Technology Indiana University-Purdue University at Indianapolis
- Department of Medical Equipment Technology, College of Applied Medical Science Majmaah University, Almajmaah, Riyadh, Saudi Arabia
| | - Xin Wen
- Department of Biomedical Engineering, Purdue School of Engineering and Technology Indiana University-Purdue University at Indianapolis
| | - Sungsoo Na
- Department of Biomedical Engineering, Purdue School of Engineering and Technology Indiana University-Purdue University at Indianapolis
| | - Gregory Anderson
- Department of Biology, Purdue School of Science Indiana University-Purdue University at Indianapolis
| | - Dong Xie
- Department of Biomedical Engineering, Purdue School of Engineering and Technology Indiana University-Purdue University at Indianapolis
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40
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Zhou W, Le J, Chen Y, Cai Y, Hong Z, Chai Y. Recent advances in microfluidic devices for bacteria and fungus research. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.12.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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41
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Wen X, Almousa R, Anderson G, Na S, Xie D. Coating polyvinylchloride surface for improved antifouling property. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:322-336. [DOI: 10.1080/09205063.2019.1570434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xin Wen
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indianapolis, IN, USA
| | - Rashed Almousa
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indianapolis, IN, USA
| | - Gregory Anderson
- Department of Biology, Purdue School of Science, Indiana University-Purdue University at Indianapolis, Indianapolis, IN, USA
| | - Sungsoo Na
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indianapolis, IN, USA
| | - Dong Xie
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indianapolis, IN, USA
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42
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Almousa R, Wen X, Na S, Anderson G, Xie D. A modified polyvinylchloride surface with antibacterial and antifouling functions. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4554] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Rashed Almousa
- Department of Biomedical Engineering, Purdue School of Engineering and TechnologyIndiana University‐Purdue University at Indianapolis Indianapolis IN 46202 USA
- Department of Medical Equipment Technology, College of Applied Medical ScienceMajmaah University Al Majma'ah Riyadh 11952 Saudi Arabia
| | - Xin Wen
- Department of Biomedical Engineering, Purdue School of Engineering and TechnologyIndiana University‐Purdue University at Indianapolis Indianapolis IN 46202 USA
| | - Sungsoo Na
- Department of Biomedical Engineering, Purdue School of Engineering and TechnologyIndiana University‐Purdue University at Indianapolis Indianapolis IN 46202 USA
| | - Gregory Anderson
- Department of Biology, Purdue School of ScienceIndiana University‐Purdue University at Indianapolis Indianapolis IN 46202 USA
| | - Dong Xie
- Department of Biomedical Engineering, Purdue School of Engineering and TechnologyIndiana University‐Purdue University at Indianapolis Indianapolis IN 46202 USA
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43
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Xie D, Howard L, Almousa R. Surface modification of polyurethane with a hydrophilic, antibacterial polymer for improved antifouling and antibacterial function. J Biomater Appl 2018; 33:340-351. [PMID: 30089433 DOI: 10.1177/0885328218792687] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Antimicrobial surface is important for the inhibition of bacteria or biofilm formation on biomaterials. The objective of this study was to immobilize a novel hydrophilic polymer containing the antibacterial moiety onto polyurethane surface via a simple surface coating technology to make the surface not only antibacterial but also antifouling. The compound 3,4-dichloro-5-hydroxy-2(5H)-furanone was derivatized, characterized and incorporated onto polyvinylpyrrolidone containing succinimidyl functional groups, followed by coating onto the polyurethane surface. Contact angle, antibacterial function and protein adsorption of the modified surface were evaluated. The result shows that the modified surface exhibited significantly enhanced hydrophilicity with a 54-65% decrease in contact angle, increased antibacterial activity to Staphylococcus aureus, Staphylococcus epidermidis, and Pseudomonas aeruginosa with a 24-57% decrease in viability, and reduced human serum albumin adsorption with a 64-70% decrease in adsorption, as compared to the original polyurethane.
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Affiliation(s)
- Dong Xie
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis 46202, IN, USA
| | - Leah Howard
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis 46202, IN, USA
| | - Rashed Almousa
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis 46202, IN, USA
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Self-Assembly Behavior and pH-Stimuli-Responsive Property of POSS-Based Amphiphilic Block Copolymers in Solution. MICROMACHINES 2018; 9:mi9060258. [PMID: 30424191 PMCID: PMC6187445 DOI: 10.3390/mi9060258] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 05/16/2018] [Accepted: 05/17/2018] [Indexed: 12/05/2022]
Abstract
Stimuli-responsive polymeric systems containing special responsive moieties can undergo alteration of chemical structures and physical properties in response to external stimulus. We synthesized a hybrid amphiphilic block copolymer containing methoxy polyethylene glycol (MePEG), methacrylate isobutyl polyhedral oligomeric silsesquioxane (MAPOSS) and 2-(diisopropylamino)ethyl methacrylate (DPA) named MePEG-b-P(MAPOSS-co-DPA) via atom transfer radical polymerization (ATRP). Spherical micelles with a core-shell structure were obtained by a self-assembly process based on MePEG-b-P(MAPOSS-co-DPA), which showed a pH-responsive property. The influence of hydrophobic chain length on the self-assembly behavior was also studied. The pyrene release properties of micelles and their ability of antifouling were further studied.
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Charmet J, Arosio P, Knowles TP. Microfluidics for Protein Biophysics. J Mol Biol 2018; 430:565-580. [DOI: 10.1016/j.jmb.2017.12.015] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 12/19/2017] [Accepted: 12/20/2017] [Indexed: 01/09/2023]
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Yang H, Leow WR, Chen X. Thermal-Responsive Polymers for Enhancing Safety of Electrochemical Storage Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1704347. [PMID: 29363208 DOI: 10.1002/adma.201704347] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 11/03/2017] [Indexed: 06/07/2023]
Abstract
Thermal runway constitutes the most pressing safety issue in lithium-ion batteries and supercapacitors of large-scale and high-power density due to risks of fire or explosion. However, traditional strategies for averting thermal runaway do not enable the charging-discharging rate to change according to temperature or the original performance to resume when the device is cooled to room temperature. To efficiently control thermal runaway, thermal-responsive polymers provide a feasible and reversible strategy due to their ability to sense and subsequently act according to a predetermined sequence when triggered by heat. Herein, recent research progress on the use of thermal-responsive polymers to enhance the thermal safety of electrochemical storage devices is reviewed. First, a brief discussion is provided on the methods of preventing thermal runaway in electrochemical storage devices. Subsequently, a short review is provided on the different types of thermal-responsive polymers that can efficiently avoid thermal runaway, such as phase change polymers, polymers with sol-gel transitions, and polymers with positive temperature coefficients. The results represent the important development of thermal-responsive polymers toward the prevention of thermal runaway in next-generation smart electrochemical storage devices.
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Affiliation(s)
- Hui Yang
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Wan Ru Leow
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xiaodong Chen
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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Zhuang Y, Cui M, Huang Z, Zou G, Zhang Q. Resilient collapse of thermal sensitive polymer on the surface of the optical fiber taper. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/polb.24590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Yiwei Zhuang
- CAS Key Laboratory of Soft Matter Chemistry, Key Laboratory of Optoelectronic Science and Technology, Innovation Centre of Chemistry for Energy Materials, Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei Anhui 230026 People's Republic of China
| | - Minxin Cui
- CAS Key Laboratory of Soft Matter Chemistry, Key Laboratory of Optoelectronic Science and Technology, Innovation Centre of Chemistry for Energy Materials, Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei Anhui 230026 People's Republic of China
| | - Zichao Huang
- CAS Key Laboratory of Soft Matter Chemistry, Key Laboratory of Optoelectronic Science and Technology, Innovation Centre of Chemistry for Energy Materials, Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei Anhui 230026 People's Republic of China
| | - Gang Zou
- CAS Key Laboratory of Soft Matter Chemistry, Key Laboratory of Optoelectronic Science and Technology, Innovation Centre of Chemistry for Energy Materials, Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei Anhui 230026 People's Republic of China
| | - Qijin Zhang
- CAS Key Laboratory of Soft Matter Chemistry, Key Laboratory of Optoelectronic Science and Technology, Innovation Centre of Chemistry for Energy Materials, Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei Anhui 230026 People's Republic of China
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Han L, Yan B, Zhang L, Wu M, Wang J, Huang J, Deng Y, Zeng H. Tuning protein adsorption on charged polyelectrolyte brushes via salinity adjustment. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Li S, Liu B, Wei T, Hu C, Hang Y, Dong Y, Liu X, Chen H. Microfluidic channels with renewable and switchable biological functionalities based on host–guest interactions. J Mater Chem B 2018; 6:8055-8063. [DOI: 10.1039/c8tb02148a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Microfluidic channels with renewable and switchable biological functionalities were prepared using host–guest interactions.
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Affiliation(s)
- Siyuan Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
- Suzhou
- P. R. China
| | - Bing Liu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
- Suzhou
- P. R. China
| | - Ting Wei
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
- Suzhou
- P. R. China
| | - Changming Hu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
- Suzhou
- P. R. China
| | - Yingjie Hang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
- Suzhou
- P. R. China
| | - Yishi Dong
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
- Suzhou
- P. R. China
| | - Xiaoli Liu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
- Suzhou
- P. R. China
| | - Hong Chen
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University
- Suzhou
- P. R. China
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Wei P, Götz S, Schubert S, Brendel JC, Schubert US. Accelerating the acidic degradation of a novel thermoresponsive polymer by host–guest interaction. Polym Chem 2018. [DOI: 10.1039/c8py00188j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Carboxylate modified pillar arenes can not only shift the LCST of acetalized polymers but can also accelerate their hydrolysis under acidic conditions.
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Affiliation(s)
- Peng Wei
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Stefan Götz
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Stephanie Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Institute of Pharmacy
| | - Johannes C. Brendel
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Jena Center for Soft Matter (JCSM)
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