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Rashidi M, Benneker AM. pH-Tunable electrokinetic movement of droplets. SOFT MATTER 2023; 19:3136-3146. [PMID: 37039565 DOI: 10.1039/d3sm00385j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Manipulation and control of droplet motion in an electric field is of interest in biological systems, microfluidics and electrokinetic (EK) separation techniques. In this work, we show that the electrokinetic motion of oil-in-water (O/W) emulsions stabilized by an amphoteric surfactant can be controlled by changing the pH. Amphoteric surfactants carry both positive and negative head groups and change charge under the influence of changing pH, which allows them to impact the surface charge of droplets as a function of pH, and in extension their direction of motion in an electric field. Using a microfluidic system, we evaluate the effect of pH, surfactant concentration and droplet size on the EK velocity of droplets, which is a combination of electrophoresis (EP) and electro-osmotic flow (EOF). We show that by changing the pH from acidic to alkali, the direction of droplet motion in an external electric field changes. The magnitude of the EK velocity at acidic and neutral pH is not significantly altered as a result of the competition of the EP and EOF in the system, which generally have opposite directions. Our results are in good agreement with theoretical predictions for the droplet EP mobility and can thus serve as a verification of the theoretical descriptions. In addition to the pH, the surfactant concentration affects droplet EK velocity, most specifically at pH of 7 which is close to the isoelectric point of the surfactant monomers. At this pH, changing the surfactant concentration changes the direction of droplet motion due the competing effect of the EP and EOF at different surfactant concentrations. By increasing the droplet size, the magnitude of the EK velocity increases because of the larger local ζ-potential of the larger droplets as well as the wall-enhanced effect in the system. The results from this work can be applied to design on-chip droplet separation strategies based on pH variations and are relevant for systems in which pH gradients naturally occur, such as the human body.
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Affiliation(s)
- Mansoureh Rashidi
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, AB, T2N 1N4, Canada.
| | - Anne M Benneker
- Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, AB, T2N 1N4, Canada.
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2
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Chiu CY, Lin HT, Yen TJ, Chang Y. Self-Assembly Anchored Cationic Copolymer Interfaces for Applying the Control of Counterion-Induced Bacteria Killing/Release Procedure. Macromol Biosci 2022; 22:e2200207. [PMID: 35875978 DOI: 10.1002/mabi.202200207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/30/2022] [Indexed: 12/25/2022]
Abstract
In recent years, daily hygiene and disease control issues have received increasing attention, especially the raging epidemics caused by the spread of deadly viruses. The construction of the interface of new polymer materials is focused on, which can provide a cyclic operation process for the killing and releasing of bacteria, and perform repeated regeneration, which is of great significance for the development of advanced medical biomaterials. In order to explore the basic physical phenomena of bacterial attachment and detachment on the polymer material interface by different amine groups, this study plans to synthesize four different butyl methacrylate (BMA)-based cationic copolymers with primary, ternary, and quaternary amine groups, and compare their effects on bactericidal efficiency. Since BMA can generate strong hydrophobic interactions with the benzene ring structure, this study used a polystyrene substrate to realize a self-assembled cationic copolymer interface for controlling the counterion-induced bacterial killing/release process. Furthermore, negatively charged ions are introduced to induce changes in the hydration capability of water molecules and control the subsequent bacterial detachment function. In this study, possible directions to answer and clarify the above concepts are proposed, and there is a basic reference principle that can lead to research work in macromolecular bioscience fields.
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Affiliation(s)
- Chieh-Yang Chiu
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu City, 300044, Taiwan (R.O.C.)
| | - Hao-Tung Lin
- R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Zhongli Dist., Taoyuan City, 320314, Taiwan (R.O.C.)
| | - Ta-Jen Yen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu City, 300044, Taiwan (R.O.C.)
| | - Yung Chang
- R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Zhongli Dist., Taoyuan City, 320314, Taiwan (R.O.C.)
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4
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Spiropyran-based photo- and thermal-responsive smart polymer with controllable wettability. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Deval P, Lin CH, Tsai WB. Fabrication of Polysulfobetaine Gradient Coating via Oxidation Polymerization of Pyrogallol To Modulate Biointerfaces. ACS OMEGA 2022; 7:7125-7133. [PMID: 35252703 PMCID: PMC8892856 DOI: 10.1021/acsomega.1c06798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 02/01/2022] [Indexed: 06/14/2023]
Abstract
A surface with a gradient physical or chemical feature, such as roughness, hardness, wettability, and chemistry, serves as a powerful platform for high-throughput investigation of cell responses to a biointerface. In this work, we developed a continuous antifouling gradient surface using pyrogallol (PG) chemistry. A copolymer of a zwitterionic monomer, sulfobetaine methacrylate, and an amino monomer, aminoethyl methacrylate, were synthesized (pSBAE) and deposited on glass slides via the deposition of self-polymerized PG. A gradient of pSBAE was fabricated on glass slides in 7 min in the presence of an oxidant, ammonium persulfate, by withdrawing the reaction solution. The modified glass slide showed a wettability gradient, determined by measuring the water contact angle. Cell adhesion and protein adsorption were well correlated with surface wettability. We expect that this simple and faster method for the fabrication of a continuous chemical gradient is applicable for high-throughput screening of surface properties to modulate biointerfaces.
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Affiliation(s)
- Piyush Deval
- Department
of Chemical Engineering, National Taiwan
University, Taipei 10617, Taiwan
| | - Chia-Hsuan Lin
- Department
of Material Science and Engineering, National
Taiwan University, Taipei 10617, Taiwan
| | - Wei-Bor Tsai
- Department
of Chemical Engineering, National Taiwan
University, Taipei 10617, Taiwan
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6
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Falina S, Syamsul M, Rhaffor NA, Sal Hamid S, Mohamed Zain KA, Abd Manaf A, Kawarada H. Ten Years Progress of Electrical Detection of Heavy Metal Ions (HMIs) Using Various Field-Effect Transistor (FET) Nanosensors: A Review. BIOSENSORS 2021; 11:478. [PMID: 34940235 PMCID: PMC8699440 DOI: 10.3390/bios11120478] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/13/2021] [Accepted: 11/17/2021] [Indexed: 05/16/2023]
Abstract
Heavy metal pollution remains a major concern for the public today, in line with the growing population and global industrialization. Heavy metal ion (HMI) is a threat to human and environmental safety, even at low concentrations, thus rapid and continuous HMI monitoring is essential. Among the sensors available for HMI detection, the field-effect transistor (FET) sensor demonstrates promising potential for fast and real-time detection. The aim of this review is to provide a condensed overview of the contribution of certain semiconductor substrates in the development of chemical and biosensor FETs for HMI detection in the past decade. A brief introduction of the FET sensor along with its construction and configuration is presented in the first part of this review. Subsequently, the FET sensor deployment issue and FET intrinsic limitation screening effect are also discussed, and the solutions to overcome these shortcomings are summarized. Later, we summarize the strategies for HMIs' electrical detection, mechanisms, and sensing performance on nanomaterial semiconductor FET transducers, including silicon, carbon nanotubes, graphene, AlGaN/GaN, transition metal dichalcogenides (TMD), black phosphorus, organic and inorganic semiconductor. Finally, concerns and suggestions regarding detection in the real samples using FET sensors are highlighted in the conclusion.
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Affiliation(s)
- Shaili Falina
- Collaborative Microelectronic Design Excellence Center (CEDEC), Universiti Sains Malaysia, Sains@USM, Bayan Lepas 11900, Pulau Pinang, Malaysia; (S.F.); (N.A.R.); (S.S.H.); (K.A.M.Z.)
- Faculty of Science and Engineering, Waseda University, Tokyo 169-8555, Japan;
| | - Mohd Syamsul
- Faculty of Science and Engineering, Waseda University, Tokyo 169-8555, Japan;
- Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia, Sains@USM, Bayan Lepas 11900, Pulau Pinang, Malaysia
| | - Nuha Abd Rhaffor
- Collaborative Microelectronic Design Excellence Center (CEDEC), Universiti Sains Malaysia, Sains@USM, Bayan Lepas 11900, Pulau Pinang, Malaysia; (S.F.); (N.A.R.); (S.S.H.); (K.A.M.Z.)
| | - Sofiyah Sal Hamid
- Collaborative Microelectronic Design Excellence Center (CEDEC), Universiti Sains Malaysia, Sains@USM, Bayan Lepas 11900, Pulau Pinang, Malaysia; (S.F.); (N.A.R.); (S.S.H.); (K.A.M.Z.)
| | - Khairu Anuar Mohamed Zain
- Collaborative Microelectronic Design Excellence Center (CEDEC), Universiti Sains Malaysia, Sains@USM, Bayan Lepas 11900, Pulau Pinang, Malaysia; (S.F.); (N.A.R.); (S.S.H.); (K.A.M.Z.)
| | - Asrulnizam Abd Manaf
- Collaborative Microelectronic Design Excellence Center (CEDEC), Universiti Sains Malaysia, Sains@USM, Bayan Lepas 11900, Pulau Pinang, Malaysia; (S.F.); (N.A.R.); (S.S.H.); (K.A.M.Z.)
| | - Hiroshi Kawarada
- Faculty of Science and Engineering, Waseda University, Tokyo 169-8555, Japan;
- The Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku, Tokyo 169-0051, Japan
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7
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Enhancing the antifouling properties of a PVDF membrane for protein separation by grafting branch-like zwitterions via a novel amphiphilic SMA-HEA linker. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119126] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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8
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Mousavi SA, Arab Aboosadi Z, Mansourizadeh A, Honarvar B. Surface modified porous polyetherimide hollow fiber membrane for sweeping gas membrane distillation of dyeing wastewater. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125439] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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9
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Koc J, Schardt L, Nolte K, Beyer C, Eckhard T, Schwiderowski P, Clarke JL, Finlay JA, Clare AS, Muhler M, Laschewsky A, Rosenhahn A. Effect of Dipole Orientation in Mixed, Charge-Equilibrated Self-assembled Monolayers on Protein Adsorption and Marine Biofouling. ACS APPLIED MATERIALS & INTERFACES 2020; 12:50953-50961. [PMID: 33112127 DOI: 10.1021/acsami.0c11580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
While zwitterionic interfaces are known for their excellent low-fouling properties, the underlying molecular principles are still under debate. In particular, the role of the zwitterion orientation at the interface has been discussed recently. For elucidation of the effect of this parameter, self-assembled monolayers (SAMs) on gold were prepared from stoichiometric mixtures of oppositely charged alkyl thiols bearing either a quaternary ammonium or a carboxylate moiety. The alkyl chain length of the cationic component (11-mercaptoundecyl)-N,N,N-trimethylammonium, which controls the distance of the positively charged end group from the substrate's surface, was kept constant. In contrast, the anionic component and, correspondingly, the distance of the negatively charged carboxylate groups from the surface was varied by changing the alkyl chain length in the thiol molecules from 7 (8-mercaptooctanoic acid) to 11 (12-mercaptododecanoic acid) to 15 (16-mercaptohexadecanoic acid). In this way, the charge neutrality of the coating was maintained, but the charged groups exposed at the interface to water were varied, and thus, the orientation of the dipoles in the SAMs was altered. In model biofouling studies, protein adsorption, diatom accumulation, and the settlement of zoospores were all affected by the altered charge distribution. This demonstrates the importance of the dipole orientation in mixed-charged SAMs for their inertness to nonspecific protein adsorption and the accumulation of marine organisms. Overall, biofouling was lowest when both the anionic and the cationic groups were placed at the same distance from the substrate's surface.
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Affiliation(s)
- Julian Koc
- Analytical Chemistry - Biointerfaces, Ruhr University Bochum, Bochum 44801, Germany
| | - Lisa Schardt
- Analytical Chemistry - Biointerfaces, Ruhr University Bochum, Bochum 44801, Germany
| | - Kim Nolte
- Analytical Chemistry - Biointerfaces, Ruhr University Bochum, Bochum 44801, Germany
| | - Cindy Beyer
- Analytical Chemistry - Biointerfaces, Ruhr University Bochum, Bochum 44801, Germany
| | - Till Eckhard
- Laboratory of Industrial Chemistry, Ruhr University Bochum, Bochum 44801, Germany
| | | | - Jessica L Clarke
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - John A Finlay
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - Anthony S Clare
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - Martin Muhler
- Laboratory of Industrial Chemistry, Ruhr University Bochum, Bochum 44801, Germany
| | - Andre Laschewsky
- Institut für Chemie, Universität Potsdam, Potsdam 14469, Germany
- Fraunhofer Institute of Applied Polymer Research IAP, Potsdam 14476, Germany
| | - Axel Rosenhahn
- Analytical Chemistry - Biointerfaces, Ruhr University Bochum, Bochum 44801, Germany
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10
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Lin HT, Venault A, Chang Y. Reducing the pathogenicity of wastewater with killer vapor-induced phase separation membranes. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118543] [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]
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11
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Detecting zeta potential of polydimethylsiloxane (PDMS) in electrolyte solutions with atomic force microscope. J Colloid Interface Sci 2020; 578:116-123. [PMID: 32521351 DOI: 10.1016/j.jcis.2020.05.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 05/12/2020] [Accepted: 05/12/2020] [Indexed: 11/22/2022]
Abstract
Zeta potential of PDMS-liquid interface is an important parameter for generating electroosmotic flow in a PDMS microchannel. In this paper, the zeta potentials of a PDMS slab in contacting with electrolyte solutions were evaluated with an atomic force microscope (AFM). As a colloidal probe of the AFM approaches to the surface of a PDMS slab in an electrolyte solution, a force curve is obtained and used to calculate the zeta potential of the PDMS. The effects of the plasma treating time and the aging of the electrolyte solutions on the zeta potential of PDMS surfaces were examined. The experimental results show that the air plasma treating time does not change the zeta potential of PDMS appreciably. Furthermore, the decreased zeta potential of a plasma-treated PDMS in an electrolyte solution is due to liquid aging, not the PDMS itself. Such characteristics probed by AFM provide new understanding of the surface charges of PDMS in electrolyte solutions.
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12
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Lafuente M, Pellejero I, Clemente A, Urbiztondo MA, Mallada R, Reinoso S, Pina MP, Gandía LM. In Situ Synthesis of SERS-Active Au@POM Nanostructures in a Microfluidic Device for Real-Time Detection of Water Pollutants. ACS APPLIED MATERIALS & INTERFACES 2020; 12:36458-36467. [PMID: 32646210 DOI: 10.1021/acsami.0c06725] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We present a simple, versatile, and low-cost approach for the preparation of surface-enhanced Raman spectroscopy (SERS)-active regions within a microfluidic channel 50 cm in length. The approach involves the UV-light-driven formation of polyoxometalate-decorated gold nanostructures, Au@POM (POM: H3PW12O40 (PW) and H3PMo12O40 (PMo)), that self-assemble in situ on the surface of the polydimethylsiloxane (PDMS) microchannels without any extra functionalization procedure. The fabricated LoCs were characterized by scanning electron microscopy (SEM), UV-vis, Raman, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) techniques. The SERS activity of the resulting Au@POM-coated lab-on-a-chip (LoC) devices was evaluated in both static and flow conditions using rhodamine R6G. The SERS response of Au@PW-based LoCs was found to be superior to Au@PMo counterparts and outstanding when compared to reported data on metal@POM nanocomposites. We demonstrate the potentialities of both Au@POM-coated LoCs as analytical platforms for real-time detection of the organophosphorous pesticide paraoxon-methyl at 10-6 M concentration level.
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Affiliation(s)
- Marta Lafuente
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Department of Chemical & Environmental Engineering, University of Zaragoza, Edificio I+D+i, Campus Rio Ebro, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain
| | - Ismael Pellejero
- Institute for Advanced Materials and Mathematics (InaMat2), Universidad Pública de Navarra (UPNA), Edificio Jerónimo de Ayanz, Campus de Arrosadia, 31006 Pamplona, Spain
| | - Alberto Clemente
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Department of Chemical & Environmental Engineering, University of Zaragoza, Edificio I+D+i, Campus Rio Ebro, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain
- Institute for Advanced Materials and Mathematics (InaMat2), Universidad Pública de Navarra (UPNA), Edificio Jerónimo de Ayanz, Campus de Arrosadia, 31006 Pamplona, Spain
| | - Miguel A Urbiztondo
- Centro Universitario de la Defensa de Zaragoza, Carretera Huesca s/n, 50090 Zaragoza, Spain
| | - Reyes Mallada
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Department of Chemical & Environmental Engineering, University of Zaragoza, Edificio I+D+i, Campus Rio Ebro, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
| | - Santiago Reinoso
- Institute for Advanced Materials and Mathematics (InaMat2), Universidad Pública de Navarra (UPNA), Edificio Jerónimo de Ayanz, Campus de Arrosadia, 31006 Pamplona, Spain
| | - María P Pina
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Department of Chemical & Environmental Engineering, University of Zaragoza, Edificio I+D+i, Campus Rio Ebro, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
| | - Luis M Gandía
- Institute for Advanced Materials and Mathematics (InaMat2), Universidad Pública de Navarra (UPNA), Edificio Jerónimo de Ayanz, Campus de Arrosadia, 31006 Pamplona, Spain
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13
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Göktaş M. Synthesis and characterization of temperature-responsive block copolymers using macromonomeric initiator. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01074-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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14
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Liu S, Ma J, Xu L, Lin W, Xue W, Huang M, Chen S. An electrospun polyurethane scaffold-reinforced zwitterionic hydrogel as a biocompatible device. J Mater Chem B 2020; 8:2443-2453. [DOI: 10.1039/c9tb02870f] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An electrospun scaffold-reinforced zwitterionic hydrogel achieved both high tensile strength and mechano-induced self-enhancement while maintaining excellent hemocompatibility.
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Affiliation(s)
- Sihang Liu
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Jun Ma
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Liangbo Xu
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Weifeng Lin
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Weili Xue
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Mei Huang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
| | - Shengfu Chen
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou
- China
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15
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Sohail M, Ashfaq B, Azeem I, Faisal A, Doğan SY, Wang J, Duran H, Yameen B. A facile and versatile route to functional poly(propylene) surfaces via UV-curable coatings. REACT FUNCT POLYM 2019. [DOI: 10.1016/j.reactfunctpolym.2019.104366] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Zhao Y, Liu L, Zhao H. Surface Reconstruction by a Coassembly Approach. Angew Chem Int Ed Engl 2019; 58:10577-10581. [PMID: 31125514 DOI: 10.1002/anie.201903798] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 05/21/2019] [Indexed: 12/11/2022]
Abstract
Materials with switchable surfaces, capable of changing surface properties under external stimuli, are playing a pivotal role in many applications, such as tissue engineering, biosensors, and drug/protein delivery. In this research silica particles with patterned and switchable surfaces are fabricated. Surface micelles on silica particles are formed by coassembly of polymer brushes and "free" block copolymer chains in a selective solvent. The cores of the surface micelles are crosslinked by anthracene photodimerization. After quaternization of the coronae, amphiphilic surface micelles are prepared. The surface micelles are able to rearrange in different media. After treatment with an organic solvent, the surfaces of silica particles are occupied by hydrophobic polymer components; in aqueous solution, the positively charged polymer chains are on the surfaces. The switching of the surface micelles results in changes in surface composition and wetting behaviors.
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Affiliation(s)
- Ya Zhao
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Li Liu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Hanying Zhao
- Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Tianjin, 300071, China.,Collaborative Innovation Center, of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
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17
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Affiliation(s)
- Ya Zhao
- Key Laboratory of Functional Polymer MaterialsMinistry of EducationCollege of ChemistryNankai University Tianjin 300071 China
| | - Li Liu
- Key Laboratory of Functional Polymer MaterialsMinistry of EducationCollege of ChemistryNankai University Tianjin 300071 China
| | - Hanying Zhao
- Key Laboratory of Functional Polymer MaterialsMinistry of EducationCollege of ChemistryNankai University Tianjin 300071 China
- Collaborative Innovation Center, of Chemical Science and Engineering (Tianjin) Tianjin 300071 China
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