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Cai R, Zhang L, Chi H. Recent development of polymer nanomicelles in the treatment of eye diseases. Front Bioeng Biotechnol 2023; 11:1246974. [PMID: 37600322 PMCID: PMC10436511 DOI: 10.3389/fbioe.2023.1246974] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 07/26/2023] [Indexed: 08/22/2023] Open
Abstract
The eye, being one of the most intricate organs in the human body, hosts numerous anatomical barriers and clearance mechanisms. This highlights the importance of devising a secure and efficacious ocular medication delivery system. Over the past several decades, advancements have been made in the development of a nano-delivery platform based on polymeric micelles. These advancements encompass diverse innovations such as poloxamer, chitosan, hydrogel-encapsulated micelles, and contact lenses embedded with micelles. Such technological evolutions allow for sustained medication retention and facilitate enhanced permeation within the eye, thereby standing as the avant-garde in ocular medication technology. This review provides a comprehensive consolidation of ocular medications predicated on polymer nanomicelles from 2014 to 2023. Additionally, it explores the challenges they pose in clinical applications, a discussion intended to aid the design of future clinical research concerning ocular medication delivery formulations.
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Affiliation(s)
- Ruijun Cai
- Department of Pharmacy, The People’s Hospital of Jiuquan, Jiuquan, Gansu, China
| | - Ling Zhang
- Department of Pharmacy, The People’s Hospital of Jiuquan, Jiuquan, Gansu, China
| | - Hao Chi
- Qingdao Municipal Hospital, University of Health and Rehabilitation Sciences, Qingdao, China
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2
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Double Stimuli-Responsive di- and Triblock Copolymers of Poly(N-isopropylacrylamide) and Poly(1-vinylimidazole): Synthesis and Self-Assembly. Int J Mol Sci 2023; 24:ijms24010879. [PMID: 36614322 PMCID: PMC9820948 DOI: 10.3390/ijms24010879] [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: 12/12/2022] [Revised: 12/25/2022] [Accepted: 12/26/2022] [Indexed: 01/05/2023] Open
Abstract
For the first time, double stimuli-responsive properties of poly(N-isopropylacrylamide) (PNIPA) and poly(1-vinylimidazole) (PVIM) block copolymers in aqueous solutions were studied. The synthesis of PNIPA60-b-PVIM90 and PNIPA28-b-PVIM62-b-PNIPA29 was performed using reversible addition-fragmentation chain transfer (RAFT) polymerization. The polymers were characterized by size exclusion chromatography and 1H NMR spectroscopy. The conformational behavior of the polymers was studied using dynamic light scattering (DLS) and fluorescence spectroscopy (FS). It was found that PNIPA and block copolymers conformation and ability for self-assembly in aqueous medium below and above cloud point temperature depend on the locus of hydrophobic groups derived from the RAFT agent within the chain. Additionally, the length of PVIM block, its locus in the chain and charge perform an important role in the stabilization of macromolecular micelles and aggregates below and above cloud point temperature. At 25 °C the average hydrodynamic radius (Rh) of the block copolymer particles at pH 3 is lower than at pH 9 implying the self-assembling of macromolecules in the latter case. Cloud points of PNIPA60-b-PVIM90 are ~43 °C and ~37 °C at a pH of 3 and 9 and of PNIPA28-b-PVIM62-b-PNIPA29 they are ~35 °C and 31 °C at a pH of 3 and 9. Around cloud point independently of pH, the Rh value for triblock copolymer rises sharply, achieves the maximum value, then falls and reaches the constant value, while for diblock copolymer, it steadily grows after reaching cloud point. The information about polarity of microenvironment around polymer obtained by FS accords with DLS data.
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3
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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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Programed Thermoresponsive Polymers with Cleavage-Induced Phase Transition. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27186082. [PMID: 36144815 PMCID: PMC9501266 DOI: 10.3390/molecules27186082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/12/2022] [Accepted: 09/15/2022] [Indexed: 11/24/2022]
Abstract
A new programed upper critical solution temperature-type thermoresponsive polymer was developed using water-soluble anionic polymer conjugates derived from polyallylamine and phthalic acid with cleavage-induced phase transition property. Intrinsic charge inversion from anion to cation of the polymer side chain is induced through a side chain cleavage reaction in acidic aqueous media. With the progress of side chain cleavage under fixed external conditions, the polymer conjugates express a thermoresponsive property, followed by shifting a phase boundary due to the change in polymer composition. When the phase transition boundary eventually reached the examined temperature, phase transition occurs under fixed external conditions. Such new insight obtained in this study opens up the new concept of time-programed stimuli-responsive polymer possessing a cleavage-induced phase transition.
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5
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Penaloza-Amion M, C Rêgo CR, Wenzel W. Local Electronic Charge Transfer in the Helical Induction of Cis-Transoid Poly(4-carboxyphenyl)acetylene by Chiral Amines. J Chem Inf Model 2022; 62:544-552. [PMID: 35080886 DOI: 10.1021/acs.jcim.1c01347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Understanding the phenomena that lead to the formation of a specific helicity in helical polymers remains a challenge even today. Various polymers have been shown to assume different helical screw-senses depending on different stimuli. Acid-base chiral amines, for example, can induce helical conformations on cis-transoid poly(4-carboxyphenyl)acetylene yielding high-intensity circular dichroism signals. There have been many experimental attempts to elucidate the driving forces involved, but the induction process remains unclear. Here, we investigate the mechanism of helical polymer formation by both Molecular Dynamics (MD) and Density Functional Theory (DFT) approaches. We find that DFT calculations and the dissociation energies between 4 monomer polymers and amines show a clear trend in the affinity of R and S conformers with clockwise and counterclockwise polymer screw-senses, respectively. The charge analysis revealed that the local charge transfer effect plays a crucial role that leads to the helical polymer-amine induction.
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Affiliation(s)
- Montserrat Penaloza-Amion
- Institute of Nanotechnology Hermann-von-Helmholtz-Platz, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - Celso R C Rêgo
- Institute of Nanotechnology Hermann-von-Helmholtz-Platz, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - Wolfgang Wenzel
- Institute of Nanotechnology Hermann-von-Helmholtz-Platz, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
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6
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Stimuli-responsive copolymeric hydrogels based on oligo(ethylene glycol) dimethacrylate for biomedical applications: An optimisation study of pH and thermoresponsive behaviour. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2021.105140] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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7
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Nishimura SN, Nishida K, Ueda T, Shiomoto S, Tanaka M. Biocompatible poly( N-(ω-acryloyloxy- n-alkyl)-2-pyrrolidone)s with widely-tunable lower critical solution temperatures (LCSTs): a promising alternative to poly( N-isopropylacrylamide). Polym Chem 2022. [DOI: 10.1039/d2py00154c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The biocompatible (co)polymers undergoes a thermal stimulus-driven liquid–liquid phase separation and form coacervates above the lower critical solution temperature (LCST). The LCSTs are able to be precisely controlled between 0 °C and 100 °C.
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Affiliation(s)
- Shin-nosuke Nishimura
- Institute for Materials Chemistry and Engineering, Kyushu University, 744, Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kei Nishida
- Institute for Materials Chemistry and Engineering, Kyushu University, 744, Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Tomoya Ueda
- Gladuate School of Engineering, Kyushu University, 744, Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Shohei Shiomoto
- Institute for Materials Chemistry and Engineering, Kyushu University, 744, Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Masaru Tanaka
- Institute for Materials Chemistry and Engineering, Kyushu University, 744, Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
- Gladuate School of Engineering, Kyushu University, 744, Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
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Baert M, Wicht K, Moussa A, Desmet G, Broeckhoven K, Lynen F. Implementations of temperature gradients in temperature-responsive liquid chromatography. J Chromatogr A 2021; 1654:462425. [PMID: 34425285 DOI: 10.1016/j.chroma.2021.462425] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/09/2021] [Accepted: 07/13/2021] [Indexed: 11/16/2022]
Abstract
Temperature Responsive Liquid Chromatography (TRLC) offers an alternative and environmentally friendly way to perform reversed-phase like separations. Its use of temperature responsive polymers to control retention based on column temperature, instead of the fraction of organic modifier in the mobile phase mobile, eliminates the need for solvent composition gradients and allows, for example, for purely aqueous separations. In principle this temperature induced retention should allow for gradient elutions to be performed using downward temperature gradients to control retention and refocus the analyte peaks. Yet, the unavailability of dedicated commercial temperature controlling systems allowing suitable temperature control in TRLC limits implementations thereof often to isothermal or step gradient applications. In this work we study the potential of 1) a simple yet programmable water bath and of 2) a modified HPLC system allowing column temperature programming through controlled mixing of a warm and cold mobile phase streams. The performance of both systems was evaluated under both isocratic and gradient applications, resulting in a more thorough understanding of the influence of temperature gradients in TRLC. This knowledge is then applied to a sample of phenolic solutes, illustrating that, although both systems have some flaws, both are able to impose temperature gradients in TRLC resulting in significantly reduced retention and enhanced refocusing of the analyte peak.
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Affiliation(s)
- Mathijs Baert
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4bis, Ghent B-9000, Belgium
| | - Kristina Wicht
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4bis, Ghent B-9000, Belgium
| | - Ali Moussa
- Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, Brussel B-1050, Belgium
| | - Gert Desmet
- Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, Brussel B-1050, Belgium
| | - Ken Broeckhoven
- Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, Brussel B-1050, Belgium
| | - Frederic Lynen
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4bis, Ghent B-9000, Belgium.
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9
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Nagase K, Ishizawa Y, Inoue M, Kokubun M, Yamada S, Kanazawa H. Temperature-responsive spin column for sample preparation using an all-aqueous eluent. Anal Chim Acta 2021; 1179:338806. [PMID: 34535268 DOI: 10.1016/j.aca.2021.338806] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/31/2021] [Accepted: 06/24/2021] [Indexed: 11/21/2022]
Abstract
We present a temperature-responsive spin column using an all-aqueous eluent. The method is intended as a simple sample preparation method for protein removal from serum, which is required for serum drug analysis. As packing materials for the spin column, we prepared two types of silica beads via surface-initiated radical polymerization. The large beads (diameter, 40-63 μm) were grafted with a temperature-responsive cationic copolymer, poly(N-isopropylacrylamide-co-N,N-dimethylaminopropyl acrylamide-co-n-butyl methacrylate) (P(NIPAAm-co-DMAPAAm-co-BMA)), and the small beads (diameter, 5 μm) were grafted with a temperature-responsive hydrophobic copolymer, P(NIPAAm-co-BMA). The beads were packed into the spin column as a double layer: P(NIPAAm-co-BMA) silica beads on the bottom and P(NIPAAm-co-DMAPAAm-co-BMA) silica beads on the top. The sample purification efficacy of the prepared spin column was evaluated on a model sample analyte (the antifungal drug voriconazole mixed with blood serum proteins). At 40 °C, the serum proteins and voriconazole were adsorbed on the prepared spin column via hydrophobic and electrostatic interactions. When the temperature was decreased to 4 °C, the adsorbed voriconazole was eluted from the column with the pure water eluent, while the serum proteins remained in the column. This temperature-responsive spin column realizes sample preparation simply by changing the temperature.
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Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan.
| | - Yuta Ishizawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Masakazu Inoue
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Matsurika Kokubun
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Sota Yamada
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
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Hahn L, Keßler L, Polzin L, Fritze L, Forster S, Helten H, Luxenhofer R. ABA Type Amphiphiles with Poly(2‐benzhydryl‐2‐oxazine) Moieties: Synthesis, Characterization and Inverse Thermogelation. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100114] [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)
- Lukas Hahn
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy Julius‐Maximilians‐University Würzburg Röntgenring 11 Würzburg 97070 Germany
| | - Larissa Keßler
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy Julius‐Maximilians‐University Würzburg Röntgenring 11 Würzburg 97070 Germany
- Soft Matter Chemistry, Department of Chemistry and Helsinki Institute of Sustainability Science, Faculty of Science University of Helsinki P.O. Box 55 Helsinki 00014 Finland
| | - Lando Polzin
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy Julius‐Maximilians‐University Würzburg Röntgenring 11 Würzburg 97070 Germany
| | - Lars Fritze
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB) Julius‐Maximilians‐University Würzburg Am Hubland Würzburg 97074 Germany
| | - Stefan Forster
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy Julius‐Maximilians‐University Würzburg Röntgenring 11 Würzburg 97070 Germany
| | - Holger Helten
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB) Julius‐Maximilians‐University Würzburg Am Hubland Würzburg 97074 Germany
| | - Robert Luxenhofer
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy Julius‐Maximilians‐University Würzburg Röntgenring 11 Würzburg 97070 Germany
- Soft Matter Chemistry, Department of Chemistry and Helsinki Institute of Sustainability Science, Faculty of Science University of Helsinki P.O. Box 55 Helsinki 00014 Finland
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11
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Constantinou AP, Zhan B, Georgiou TK. Tuning the Gelation of Thermoresponsive Gels Based on Triblock Terpolymers. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02533] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Anna P. Constantinou
- Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, SW7 2AZ London, U.K
| | - Beini Zhan
- Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, SW7 2AZ London, U.K
| | - Theoni K. Georgiou
- Department of Materials, Imperial College London, Royal School of Mines, Exhibition Road, SW7 2AZ London, U.K
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12
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Li Q, Zhu S, Hao G, Hu Y, Wu F, Jiang W. Fabrication of thermoresponsive metal-organic nanotube sponge and its application on the adsorption of endocrine-disrupting compounds and pharmaceuticals/personal care products: Experiment and molecular simulation study. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 273:116466. [PMID: 33486254 DOI: 10.1016/j.envpol.2021.116466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 01/05/2021] [Accepted: 01/06/2021] [Indexed: 05/12/2023]
Abstract
Thermoresponsive metal-organic nanotube modified (MONT-pNIPAM, pNIPAM = poly N-isopropylacrylamide) sponge was synthesized using the dip-coating method and served as an adsorbent for endocrine-disrupting compounds (EDCs) and pharmaceuticals/personal care products (PPCPs) removal. The material was characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and N2 sorption-desorption. Nonlinear regression-based equations were derived to optimize pH and ionic strength during process. Though thermoresponsive polymer phase transition between dissolve and aggregate, realizing the adsorption tunnel "ON-OFF" under the temperature control. Adsorption kinetics and isotherms were investigated on the basis of a static experiment. The pseudo-second-order kinetic model and the Langmuir isotherm were fitted well to characterize adsorption. At an initial concentration of 50 mg L-1, maximum adsorption capacity were 128 mg/g, 184 mg/g and partition coefficient were 1.09 mg g-1 μM-1, 1.13 mg g-1 μM-1 for dibutyl phthalate (DBP) and parachlorometaxylenol (PCMX), respectively. The density-functional theory (DFT) was applied to calculate the interaction energy and investigate the possible mechanism. Combining the experimental data with theoretical calculation, results demonstrated that the MONT-pNIPAM sponge was a highly efficient adsorbent material that was suitable for the removal of EDCs/PPCPs from water.
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Affiliation(s)
- Qiulin Li
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Simin Zhu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Gazi Hao
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Yubing Hu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Fang Wu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Wei Jiang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China.
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Gobeze HB, Ma J, Leonik FM, Kuroda DG. Bottom-Up Approach to Assess the Molecular Structure of Aqueous Poly( N-Isopropylacrylamide) at Room Temperature via Infrared Spectroscopy. J Phys Chem B 2020; 124:11699-11710. [PMID: 33306373 PMCID: PMC7872429 DOI: 10.1021/acs.jpcb.0c08424] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The structure of poly(N-isopropylacrylamide) (PNIPAM) in solution is still an unresolved topic. Here, the PNIPAM structure in water was investigated using a bottom-up approach, involving the monomer, dimer, and trimer, and a combination of infrared (IR) spectroscopies as well as molecular dynamics simulations. The experiments show that the monomer and oligomers exhibit a broad and asymmetric amide I band with two underlying transitions, while PNIPAM presents the same major transitions and a minor one. Analysis of the 2D IR spectra and theoretical modeling of the amide I band indicates that the two transitions of the monomer do not have the same molecular origin as the oligomers and the polymer. In the monomer, the two bands originate from the ultrafast rotation of its ethyl group, which leads to different solvation structures for the various rotational conformers. In the case of the oligomers, the asymmetry and splitting of the amide I band is caused by the vibrational coupling among adjacent amide side chains. Moreover, it is deduced from the simulations that the oligomers have three distinct backbone conformations for neighboring amides. In particular, two of the backbone conformations have a closed and compact structure, while in the third, the backbone is open and elongated. The bottom-up approach allowed us to infer that such backbone conformations exist in PNIPAM as well. Consequently, the two major amide I transitions of the polymer are also assigned to split amide I transitions resulting from the vibrationally coupled nearest-neighboring amides. In contrast, the additional minor transition observed in PNIPAM is assigned to unsolvated amide units of the polymer. The proposed molecular model successfully describes that PNIPAM amide I band changes with temperature in terms of its molecular structure. This new model strongly suggests that PNIPAM does not have a completely random backbone structure, but has distinct backbone conformers between neighboring amides.
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Affiliation(s)
- Habtom B Gobeze
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Jianbo Ma
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Fedra M Leonik
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Daniel G Kuroda
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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14
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González-Sálamo J, Ortega-Zamora C, Carrillo R, Hernández-Borges J. Application of stimuli-responsive materials for extraction purposes. J Chromatogr A 2020; 1636:461764. [PMID: 33316565 DOI: 10.1016/j.chroma.2020.461764] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 11/21/2020] [Accepted: 11/24/2020] [Indexed: 12/21/2022]
Abstract
Stimuli-responsive materials, frequently designated as "smart/intelligent materials", can modify their structure or properties by either a biological, physical, or chemical stimulus which, if properly controlled, could be used for specific applications. Such materials have been studied and exploited in several fields, like electronics, photonics, controlled drugs administration, imaging and medical diagnosis, among others, as well as in Analytical Chemistry where they have been used as chromatographic stationary phases, as part of sensors and for extraction purposes. This review article pretends to provide an overview of the most recent applications of these materials (mostly polymeric materials) in sample preparation for extraction purposes, as well as to provide a general vision of the current state-of-the-art of this field, their potential use and future applications.
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Affiliation(s)
- Javier González-Sálamo
- Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL). Avda. Astrofísico Fco. Sánchez, s/n. 38206 San Cristóbal de La Laguna, España; Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Universidad de La Laguna (ULL). Avda. Astrofísico Fco. Sánchez, s/n. 38206 San Cristóbal de La Laguna, España.
| | - Cecilia Ortega-Zamora
- Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL). Avda. Astrofísico Fco. Sánchez, s/n. 38206 San Cristóbal de La Laguna, España
| | - Romen Carrillo
- Instituto de Productos Naturales y Agrobiología IPNA-CSIC. Avda. Astrofísico Fco. Sánchez, 3. 38206 San Cristóbal de La Laguna, España
| | - Javier Hernández-Borges
- Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL). Avda. Astrofísico Fco. Sánchez, s/n. 38206 San Cristóbal de La Laguna, España; Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Universidad de La Laguna (ULL). Avda. Astrofísico Fco. Sánchez, s/n. 38206 San Cristóbal de La Laguna, España.
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15
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Jana S, Uchman M. Poly(2-oxazoline)-based stimulus-responsive (Co)polymers: An overview of their design, solution properties, surface-chemistries and applications. Prog Polym Sci 2020. [DOI: 10.1016/j.progpolymsci.2020.101252] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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16
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Kil KH, Yethiraj A, Kim JS. Nematic ordering of hard rods under strong confinement in a dense array of nanoposts. Phys Rev E 2020; 101:032705. [PMID: 32289982 DOI: 10.1103/physreve.101.032705] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 02/26/2020] [Indexed: 11/07/2022]
Abstract
The effect of confinement on the behavior of liquid crystals is interesting from a fundamental and practical standpoint. In this work, we report Monte Carlo simulations of hard rods in an array of hard nanoposts, where the surface-to-surface separations between nanoposts are comparable to or less than the length of hard rods. This particular system shows promise as a means of generating large-scale organization of the nematic liquid by introducing an entropic external field set by the alignment of nanoposts. The simulations show that nematic ordering of hard rods is enhanced in the nanopost arrays compared with that in bulk, in the sense that the nematic order is significant even at low concentrations at which hard rods remain isotropic in bulk, and the enhancement becomes more significant as the passage width between two nearest nanoposts decreases. An analysis of local distribution of hard-rod orientations at low concentrations with weak nematic ordering reveals that hard rods are preferentially aligned along nanoposts in the narrowing regions between two curved surfaces of nearest nanoposts; hard rods are less ordered in the passages and in the centers of interpost spaces. It is concluded that at low concentrations the confinement in a dense array of nanoposts induces the localized nematic order first in the narrowing regions and, as the concentration further increases, the nematic order spreads over the whole region. The formation of a well-ordered phase at low concentrations of hard rods in a dense array of nanoposts can provide a new route to the low-concentration preparation of nematic liquid crystals that can be used as anisotropic dispersion media.
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Affiliation(s)
- Kye Hyoung Kil
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Arun Yethiraj
- Department of Chemistry, University of Wisconsin-Madison, Wisconsin 53706, USA
| | - Jun Soo Kim
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
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17
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Gao HM, Li B, Zhang R, Sun ZY, Lu ZY. Free energy for inclusion of nanoparticles in solvated polymer brushes from molecular dynamics simulations. J Chem Phys 2020; 152:094905. [DOI: 10.1063/5.0002257] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- Hui-Min Gao
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China
- School of Mathematics, Jilin University, Changchun 130023, China
| | - Bing Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Ran Zhang
- School of Mathematics, Jilin University, Changchun 130023, China
| | - Zhao-Yan Sun
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Chinese Academy of Sciences, Beijing 100039, China
- Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters, College of Physical Science and Technology, Yili Normal University, Yining 835000, China
| | - Zhong-Yuan Lu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China
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18
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Yamano T, Higashi N, Koga T. Precisely Synthesized Sequence-Controlled Amino Acid-Derived Vinyl Polymers: New Insights into Thermo-Responsive Polymer Design. Macromol Rapid Commun 2020; 41:e1900550. [PMID: 31894629 DOI: 10.1002/marc.201900550] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 12/06/2019] [Indexed: 01/01/2023]
Abstract
Thermo-responsive block copolymers are of great interest in biomedical and nanotechnological fields. These polymers achieve a versatile and complex responsiveness through a sophisticated and intricate combination of different thermo-responsive blocks. While their utility is clear, the fundamental design principles of such vinyl polymers are not yet thoroughly understood. Herein, a precise synthesis of sequence-controlled amino-acid-derived vinyl polymers and their unique thermal response in water are reported. Seven distinct block (random) copolymers that contain two kinds of amino acid blocks (poly(N-acryloyl alanine(A)- or glycine(G)-methyl ester)) with the same total chain length (degree of polymerization [DP] ≈30) and chemical composition (A/G ≈1), but with systematic variations in the block sequence and length, with an accuracy target of DP ± 1, are prepared. By specifying the primary structure, the thermal responses including transition temperature, thermo-sensitivity, and microenvironment in the dehydrated state can be finely tuned. These findings offer new directions in the design of structurally and functionally diverse thermo-responsive vinyl polymers.
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Affiliation(s)
- Tsukasa Yamano
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
| | - Nobuyuki Higashi
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
| | - Tomoyuki Koga
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
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Nagase K, Shukuwa R, Takahashi H, Takeda N, Okano T. Enhanced mechanical properties and cell separation with thermal control of PIPAAm-brushed polymer-blend microfibers. J Mater Chem B 2020; 8:6017-6026. [DOI: 10.1039/d0tb00972e] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Thermoresponsive microfibers with enhanced mechanical properties for temperature-modulated cell separation were developed by electrospinning of blending PVBC and PBMA, and by subsequently modifying the microfibers with PIPAAm via ATRP.
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Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy
- Keio University
- Tokyo 105-8512
- Japan
- Institute of Advanced Biomedical Engineering and Science
| | - Risa Shukuwa
- Institute of Advanced Biomedical Engineering and Science
- Tokyo Women's Medical University (TWIns)
- Tokyo 162-8666
- Japan
- Department of Life Science and Medical Bioscience
| | - Hironobu Takahashi
- Institute of Advanced Biomedical Engineering and Science
- Tokyo Women's Medical University (TWIns)
- Tokyo 162-8666
- Japan
| | - Naoya Takeda
- Department of Life Science and Medical Bioscience
- Graduate School of Advanced Science and Engineering
- Waseda University (TWIns)
- Tokyo 162-8480
- Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science
- Tokyo Women's Medical University (TWIns)
- Tokyo 162-8666
- Japan
- Cell Sheet Tissue Engineering Center (CSTEC)
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20
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Hoffman AS, Stayton PS. Applications of “Smart Polymers” as Biomaterials. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00016-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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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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22
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Preparation and Properties of Thermoresponsive P(N-Isopropylacrylamide-co-butylacrylate) Hydrogel Materials for Smart Windows. INT J POLYM SCI 2019. [DOI: 10.1155/2019/3824207] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Thermoresponsive polymers that exhibit phase transition in response to temperature change can be used as material for smart windows because they can control solar light transmission depending on the outside temperature. The development of thermoresponsive polymers for a smart window that can be used over a wide temperature range is required. Therefore, to obtain smart window materials that can be used at various temperatures, three-dimensional thermoresponsive P(NIPAm-co-BA) hydrogels were prepared by free radical polymerization from main monomer N-isopropylacrylamide, comonomer butyl acrylate, and crosslinking agent N,N′-methylenebisacrylamide (MBAm) in this study. This study examined the effect of BA content on the lower critical solution temperature (LCST) and the solar light transmittance of crosslinked P(NIPAm-co-BA) hydrogel films. The LCST of hydrogel films was found to be significantly decreased from 34.3 to 29.5°C with increasing BA content from 0 to 20 mol%. It was found that the transparent films at T=25°C (T<LCST) were converted to translucent films at a higher temperature (T=45°C) (T>LCST). These results suggested that the crosslinked P(NIPAm-co-BA) hydrogel materials prepared in this study could have high potential for application in smart window materials.
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23
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Mixed polymer brush as a functional ligand of silica beads for temperature-modulated hydrophobic and electrostatic interactions. Anal Chim Acta 2019; 1095:1-13. [PMID: 31864610 DOI: 10.1016/j.aca.2019.10.058] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 10/21/2019] [Accepted: 10/24/2019] [Indexed: 11/23/2022]
Abstract
We developed a mixed polymer brush, which consists of temperature-responsive polymer and cationic polymer modified beads as functional chromatographic matrices, for temperature-modulated multiple hydrophobic and electrostatic interactions. The mixed polymer brush was modified on silica beads through the combination of reversible addition-fragmentation chain transfer (RAFT) polymerization of N,N-dimethylaminopropyl acrylamide (DMAPAAm) and surface initiated atom transfer radical polymerization (ATRP) of N-isopropylacrylamide (NIPAAm). Zeta potential measurement of the mixed polymer brush revealed that the zeta potential increased with increasing temperature, which was attributed to the exposed PDMAPAAm on the beads arising from the shrinking of PNIPAAm upon increasing the temperature. The prepared beads were used as the packing material of high performance liquid chromatography (HPLC) columns, and the elution behavior of steroids, adenosine nucleotides, and proteins through the column was observed. The retention time of steroids increased with increasing the column temperature because of the dehydration of PNIPAAm in the mixed polymer brush. Adenosine nucleotides were also retained by the columns, which was attributed to the electrostatic interaction with PDMAPAAm in the mixed polymer brush. Several proteins were adsorbed on the column at elevated temperatures because of the enhanced electrostatic interaction of exposed PDMAPAAm and the enhanced hydrophobic interaction resulting from the dehydration of PNIPAAm. By exploiting this unique property, mixtures of proteins could be separated by simply changing the column temperature. These results indicate that the developed mixed polymer brush modified beads would be useful as functional chromatographic packing matrices for thermally-modulated multiple hydrophobic and electrostatic interactions.
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Sponchioni M, Capasso Palmiero U, Moscatelli D. Thermo-responsive polymers: Applications of smart materials in drug delivery and tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 102:589-605. [PMID: 31147031 DOI: 10.1016/j.msec.2019.04.069] [Citation(s) in RCA: 164] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/02/2019] [Accepted: 04/22/2019] [Indexed: 01/01/2023]
Abstract
Synthetic polymers are attracting great attention in the last decades for their use in the biomedical field as nanovectors for controlled drug delivery, hydrogels and scaffolds enabling cell growth. Among them, polymers able to respond to environmental stimuli have been recently under growing consideration to impart a "smart" behavior to the final product, which is highly desirable to provide it with a specific dynamic and an advanced function. In particular, thermo-responsive polymers, materials able to undergo a discontinuous phase transition or morphological change in response to a temperature variation, are among the most studied. The development of the so-called controlled radical polymerization techniques has paved the way to a high degree of engineering for the polymer architecture and properties, which in turn brought to a plethora of sophisticated behaviors for these polymers by simply switching the external temperature. These can be exploited in many different fields, from separation to advanced optics and biosensors. The aim of this review is to critically discuss the latest advances in the development of thermo-responsive materials for biomedical applications, including a highly controlled drug delivery, mediation of cell growth and bioseparation. The focus is on the structural and design aspects that are required to exploit such materials for cutting-edge applications in the biomedical field.
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Affiliation(s)
- Mattia Sponchioni
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy; Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland.
| | - Umberto Capasso Palmiero
- Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Davide Moscatelli
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via Mancinelli 7, 20131 Milano, Italy
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25
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Korde JM, Kandasubramanian B. Fundamentals and Effects of Biomimicking Stimuli-Responsive Polymers for Engineering Functions. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00683] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jay M. Korde
- Biocomposite Laboratory, Department of Metallurgical & Materials Engineering, DIAT (DU), Ministry of Defence, Girinagar, Pune-411025, India
| | - Balasubramanian Kandasubramanian
- Biocomposite Laboratory, Department of Metallurgical & Materials Engineering, DIAT (DU), Ministry of Defence, Girinagar, Pune-411025, India
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26
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Investigations into the interaction thermodynamics of TRAP-related peptides with a temperature-responsive polymer-bonded porous silica stationary phase. Anal Chim Acta X 2019; 1:100008. [PMID: 33117975 PMCID: PMC7587034 DOI: 10.1016/j.acax.2019.100008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The interaction thermodynamics of the thrombin receptor agonistic peptide (TRAP-1), H-Ser-Phe-Leu-Leu-Arg-Asn-Pro-OH, and a set of alanine scan substitution peptides, have been investigated with an n-octadecylacrylic polymer-bonded porous silica (Sil-ODA18) and water-acetonitrile mobile phases at temperatures ranging from 5 to 80 °C in 5 °C increments. The retention of these peptides on the Sil-ODA18 stationary phase decreased as the water content in the mobile phase was lowered from 80% (v/v) to ca. 45% (v/v) and reached a minimum value for each peptide at a specific water-acetonitrile composition. Further decreases in the water content of the mobile phase led to increased retention. The magnitude of the changes in enthalpy of interaction, Δ H a s s o c 0 , changes in entropy of interaction, Δ S a s s o c 0 , and changes in heat capacity, Δ C p 0 , were found to be dependent on the molecular properties of the mobile phase, the temperature, the structure/mobility of the stationary phase, and the conformation and solvation state of the peptides. With water-rich mobile phases, the retention behaviour of the TRAP analogues was dominated by enthalpic processes, consistent with the participation of strong hydrogen bonding effects, but became dominated by entropic effects with acetonitrile-rich mobile phases as the temperature was increased. These changes in the retention behaviour of these TRAP peptides are consistent with the generation of water or acetonitrile clusters in the mobile phase depending on the volume fractions of the organic solvent as the Sil-ODA18 stationary phase transitions from its crystalline to its isotropic state.
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27
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Feng J, Guo Z. Wettability of graphene: from influencing factors and reversible conversions to potential applications. NANOSCALE HORIZONS 2019; 4:339-364. [PMID: 32254088 DOI: 10.1039/c8nh00348c] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
As a member of the carbon material family, graphene has long been the focus of research on account of its abundant excellent properties. Nevertheless, many previous research works have attached much importance to its mechanical capacity and electrical properties, and not to its surface wetting properties with respect to water. In this review, a series of methods are put forward for characterization of the water contact angle of graphene, such as experimental measurements, classic molecular dynamics simulations, and formula calculations. A series of factors that affect the wettability of graphene, including defects, controllable atmosphere, doping, and electric field, are also discussed in detail, and have rarely have been covered in other review articles before. Finally, with the developments of smart surfaces, a reversible wettability variation of graphene from hydrophobic to hydrophilic is important in the presence of external stimulation and is discussed in detail herein. It is anticipated that graphene could serve as a tunable wettability coating for further developments in electronic devices and brings a new perspective to the construction of smart material surfaces.
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Affiliation(s)
- Jing Feng
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, People's Republic of China
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28
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Tizro N, Moniri E, Saeb K, Panahi HA, Ardakani SS. Preparation and application of grafted β‑cyclodextrin/thermo-sensitive polymer onto modified Fe3O4@SiO2 nano-particles for fenitrothion elimination from aqueous solution. Microchem J 2019. [DOI: 10.1016/j.microc.2018.09.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Serzen İlboğa, Pekdemir E, Coşkun M. Cloud Point Temperature, Thermal and Dielectrical Behaviors of Thermosensitive Block Copolymers Based N-Isopropylacrylamide. POLYMER SCIENCE SERIES B 2019. [DOI: 10.1134/s1560090419010068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Vancoillie G, Van Guyse JFR, Voorhaar L, Maji S, Frank D, Holder E, Hoogenboom R. Understanding the effect of monomer structure of oligoethylene glycol acrylate copolymers on their thermoresponsive behavior for the development of polymeric sensors. Polym Chem 2019. [DOI: 10.1039/c9py01326a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oligoethylene glycol acrylate (OEGA) polymers are a class of thermoresponsive polymers. Three new OEGA monomer combinations were investigated, which revealed three different types of thermoresponsive behavior as a function of copolymer composition.
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Affiliation(s)
- Gertjan Vancoillie
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Joachim F. R. Van Guyse
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Lenny Voorhaar
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Samarendra Maji
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Daniel Frank
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Elizabeth Holder
- Functional Polymers Group and Institute of Polymer Technology
- University of Wuppertal
- D-42097 Wuppertal
- Germany
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
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31
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Wu X, Wang S, Zhang L, Wu L, Chen Y. Thermally controlled biotransformation of glycyrrhizic acid via an asymmetric temperature-responsive polyurethane membrane. RSC Adv 2018; 8:34823-34829. [PMID: 35547039 PMCID: PMC9087016 DOI: 10.1039/c8ra06202a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 09/17/2018] [Indexed: 01/04/2023] Open
Abstract
Separating a target product from a relatively complex bioreaction system is often difficult. In this work, a "smart" bioreaction system was developed by using the special characteristic of temperature-responsive polyurethane (TRPU). By combining solvent evaporation with a wet phase inversion technique, an asymmetric membrane consisting of an integral and dense skin layer supported by a porous sublayer was prepared from a thermally responsive polyurethane that experiences a sudden free volume increase upon heating through a phase transition temperature of 56 °C. Subsequently, the asymmetric TRPU membrane served as the carrier of an immobilized enzyme, wherein β-glucuronidase was multipoint-conjugated by using biotin and streptavidin on the porous sublayer. Then, the material-asymmetric TRPU membrane served jointly as the antennae as well as the actuator, which reversibly responds to temperature to switch (on-off) the access of the reactant glycyrrhizic acid (GL). Under the optimal temperature (40 °C) and pH (7.0) conditions, the immobilized β-glucuronidase contributed to almost 33% yield of glycyrrhetinic acid 3-O-mono-β-d-glucuronide (GAMG) of the isolated counterpart for the same concentration of substrate (250 mg L-1) reaction for 24 h, while costing 1% of that of the isolated β-glucuronidase. Kinetic results showed that V max and K m values were 8.89 × 103 mg L-1 and 2.30 × 103 mg L-1 h-1, respectively. The specific functional polymer-immobilized β-glucuronidase design serves as a bioreactor of GL into GAMG, as well as a separator deliberately irritated and controlled by temperature. This "smart" support material presents a potential facilitator for the separation of complex biotransformation reactions.
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Affiliation(s)
- Xiuhong Wu
- School of Chemical and Engineering, University of Science and Technology Liaoning Anshan Liaoning 114051 PR China
- Department of Chemistry, Massachusetts of Institute of Technology Cambridge MA 02139 USA
| | - Shaoyan Wang
- School of Chemical and Engineering, University of Science and Technology Liaoning Anshan Liaoning 114051 PR China
| | - Lina Zhang
- School of Chemical and Engineering, University of Science and Technology Liaoning Anshan Liaoning 114051 PR China
| | - Lidong Wu
- The Key Laboratory of Control of Quality and Safety for Aquatic Products, Ministry of Agriculture, Chinese Academy of Fishery Sciences Beijing 100141 PR China
- Department of Chemistry, Massachusetts of Institute of Technology Cambridge MA 02139 USA
| | - Yi Chen
- The Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education Chengdu 610065 PR China
- Department of Chemistry, Massachusetts of Institute of Technology Cambridge MA 02139 USA
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32
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Jommanee N, Chanthad C, Manokruang K. Preparation of injectable hydrogels from temperature and pH responsive grafted chitosan with tuned gelation temperature suitable for tumor acidic environment. Carbohydr Polym 2018; 198:486-494. [PMID: 30093026 DOI: 10.1016/j.carbpol.2018.06.099] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 06/21/2018] [Accepted: 06/22/2018] [Indexed: 11/15/2022]
Abstract
In this present work, stimuli responsive polymers that can respond to the temperature and pH of the environment were prepared. A series of temperature responsive diblock copolymers based on poly(ethylene glycol) methyl ether (mPEG) and ε-caprolactone (CL) were synthesized. Subsequently, the diblock copolymers were grafted onto chitosan, a pH responsive biopolymer. These chitosan-graft-(mPEG-block-PCL) (chitosan-g-(mPEG-b-PCL)) graft copolymers were structurally characterized by 1H NMR and FTIR and their sol-gel phase transitions were analyzed by the test tube inversion method as well as dynamic rheological measurements. These chitosan-g-(mPEG-b-PCL) graft copolymers demonstrated tunable temperature and pH responsive sol-gel phase transitions that correspond well with body temperature and pH of acidic tumor microenvironments. Gelation temperature (Tgel) decreased with increasing pH of the system, increasing PCL composition in the diblock copolymers, increasing solution concentration and decreasing grafting content of the diblock copolymers on chitosan. The graft copolymer hydrogels successfully showed the sustained release of both doxorubicin and curcumin for up to 2 weeks. The designed system was based on chitosan-g-(mPEG-b-PCL) graft copolymers, of which chitosan showed pH responsive properties and mPEG-b-PCL acted as a temperature sensitive moiety. In addition, mPEG and PCL are recognized as biocompatible polymers and chitosan has been engaged in various pharmaceutical research. Thus, this system could be considered an alternative choice for drug delivery applications.
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Affiliation(s)
- Natnicha Jommanee
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chalathorn Chanthad
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Kiattikhun Manokruang
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
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33
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Preparation of an ethylene glycol-based block copolymer consisting of six different temperature-responsive blocks. Polym J 2018. [DOI: 10.1038/s41428-018-0091-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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34
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Yang QS, Fan QW, Shen ZL, Xia YQ, Tian WD, Chen K. Beating of grafted chains induced by active Brownian particles. J Chem Phys 2018; 148:214904. [PMID: 29884058 DOI: 10.1063/1.5029967] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study the interplay between active Brownian particles (ABPs) and a "hairy" surface in two-dimensional geometry. We find that the increase of propelling force leads to and enhances inhomogeneous accumulation of ABPs inside the brush region. Oscillation of chain bundles (beating like cilia) is found in company with the formation and disassembly of a dynamic cluster of ABPs at large propelling forces. Meanwhile chains are stretched and pushed down due to the effective shear force by ABPs. The decrease of the average brush thickness with propelling force reflects the growth of the beating amplitude of chain bundles. Furthermore, the beating phenomenon is investigated in a simple single-chain system. We find that the chain swings regularly with a major oscillatory period, which increases with chain length and decreases with the increase of propelling force. We build a theory to describe the phenomenon and the predictions on the relationship between the period and amplitude for various chain lengths, and propelling forces agree very well with simulation data.
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Affiliation(s)
- Qiu-Song Yang
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China
| | - Qing-Wei Fan
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China
| | - Zhuang-Lin Shen
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China
| | - Yi-Qi Xia
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China
| | - Wen-de Tian
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China
| | - Kang Chen
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China
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35
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Poly(N-isopropylacrylamide) grafting solution parameters for controlling temperature responsiveness in PET membranes fabricated using 248 nm KrF excimer laser. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.04.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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36
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Synthesis of high generation thermo-sensitive dendrimers for extraction of rivaroxaban from human fluid and pharmaceutic samples. J Chromatogr A 2018. [DOI: 10.1016/j.chroma.2018.02.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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Abdelaty MSA. Environmental functional photo-cross-linked hydrogel bilayer thin films from vanillin (part 2): temperature-responsive layer A, functional, temperature and pH layer B. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2297-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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38
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AKIYAMA Y, OKANO T. Temperature-Responsive Cell Culture Surface for Cell-Sheet Tissue Engineering and Its Design to Express Temperature-Dependent Cell Attachment/Detachment Character. KOBUNSHI RONBUNSHU 2018. [DOI: 10.1295/koron.2017-0078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yoshikatsu AKIYAMA
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University
| | - Teruo OKANO
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University
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39
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Umapathi R, Reddy PM, Rani A, Venkatesu P. Influence of additives on thermoresponsive polymers in aqueous media: a case study of poly(N-isopropylacrylamide). Phys Chem Chem Phys 2018; 20:9717-9744. [DOI: 10.1039/c7cp08172c] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Thermoresponsive polymers (TRPs) in different solvent media have been studied over a long period and are important from both scientific and technical points of view.
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Affiliation(s)
| | - P. Madhusudhana Reddy
- Department of Chemistry
- University of Delhi
- Delhi-110 007
- India
- Department of Chemical Engineering
| | - Anjeeta Rani
- Department of Chemistry
- University of Delhi
- Delhi-110 007
- India
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40
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Hernández-Vargas G, Ponce-Ponce de León CA, González-Valdez J, Iqbal HMN. “Smart” Polymers: Physicochemical Characteristics and Applications in Bio-Separation Strategies. SEPARATION AND PURIFICATION REVIEWS 2017. [DOI: 10.1080/15422119.2017.1356332] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Gustavo Hernández-Vargas
- Tecnologico de Monterrey, School of Engineering and Science, Tecnologico de Monterrey, Campus Monterrey, Monterrey, N.L., Mexico
| | | | - José González-Valdez
- Tecnologico de Monterrey, School of Engineering and Science, Tecnologico de Monterrey, Campus Monterrey, Monterrey, N.L., Mexico
| | - Hafiz M. N. Iqbal
- Tecnologico de Monterrey, School of Engineering and Science, Tecnologico de Monterrey, Campus Monterrey, Monterrey, N.L., Mexico
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41
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An amphiphilic and photoswitchable organocatalyst for the aldol reaction based on a product-imprinted polymer. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.07.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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42
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Hedir GG, Arno MC, Langlais M, Husband JT, O'Reilly RK, Dove AP. Poly(oligo(ethylene glycol) vinyl acetate)s: A Versatile Class of Thermoresponsive and Biocompatible Polymers. Angew Chem Int Ed Engl 2017; 56:9178-9182. [DOI: 10.1002/anie.201703763] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/12/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Guillaume G. Hedir
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
- Institute of Advanced Study; Millburn House; Millburn House Hill Road; The University of Warwick; Science Park Coventry CV4 8UW UK
| | - Maria C. Arno
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Marvin Langlais
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Jonathan T. Husband
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Rachel K. O'Reilly
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Andrew P. Dove
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
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43
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Hedir GG, Arno MC, Langlais M, Husband JT, O'Reilly RK, Dove AP. Poly(oligo(ethylene glycol) vinyl acetate)s: A Versatile Class of Thermoresponsive and Biocompatible Polymers. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703763] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Guillaume G. Hedir
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
- Institute of Advanced Study; Millburn House; Millburn House Hill Road; The University of Warwick; Science Park Coventry CV4 8UW UK
| | - Maria C. Arno
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Marvin Langlais
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Jonathan T. Husband
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Rachel K. O'Reilly
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Andrew P. Dove
- Department of Chemistry; The University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
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44
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Sepehrifar R, Boysen RI, Danylec B, Yang Y, Saito K, Hearn MT. Design, synthesis and application of a new class of stimuli-responsive separation materials. Anal Chim Acta 2017; 963:153-163. [DOI: 10.1016/j.aca.2017.01.061] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 01/25/2017] [Accepted: 01/29/2017] [Indexed: 11/29/2022]
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45
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Gyles DA, Castro LD, Silva JOC, Ribeiro-Costa RM. A review of the designs and prominent biomedical advances of natural and synthetic hydrogel formulations. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.01.027] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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46
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Raja MA, Arif M, Feng C, Zeenat S, Liu CG. Synthesis and evaluation of pH-sensitive, self-assembled chitosan-based nanoparticles as efficient doxorubicin carriers. J Biomater Appl 2017; 31:1182-1195. [PMID: 28081668 DOI: 10.1177/0885328216681184] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A novel pH-responsive polymer based on amphiphilic N-acetyl histidine and arginine-grafted chitosan was synthesized using N-acetyl histidine as hydrophobic segment and arginine as hydrophilic segment by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide-mediated coupling reactions as anticancer drug delivery system for doxorubicin. The structure of the synthesized polymer was confirmed by Fourier transform infrared and 1H nuclear magnetic resonance analysis. Due to self-association behavior, N-acetyl histidine and arginine-grafted chitosan structured nanoparticles with in size range of 204 nm. N-acetyl histidine and arginine-grafted chitosan with different substitution degree of N-acetyl histidine were initially prepared and characterized. The critical micelle concentration decreased with increasing substitution degree of N-acetyl histidine. Furthermore, N-acetyl histidine and arginine-grafted chitosan nanoparticles exhibited an acidic pH-triggered aggregation and disassembling nature. The doxorubicin-encapsulated nanoparticles based on synthesized conjugate ( N-acetyl histidine and arginine-grafted chitosan/doxorubicin nanoparticles) showed a sustained drug release pattern, which could be hastened under acidic pH conditions but delayed with increasing substitution degree of N-acetyl histidine. Anticancer effects demonstrated that N-acetyl histidine and arginine-grafted chitosan/doxorubicin nanoparticles could suppress both sensitive and resistant human breast tumor cell line (MCF-7) efficiently in a dose- and time-dependent pattern. Confocal microscopy results evidenced increased cellular uptake and enhanced retention of the synthesized nanoparticles in drug-resistant cells demonstrating better efficacy of nanoparticles over native doxorubicin. These results suggest that N-acetyl histidine and arginine-grafted chitosan/doxorubicin nanoparticles might be promising carriers for delivery of hydrophobic drug doxorubicin against drug-resistant tumors.
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Affiliation(s)
- Mazhar Ali Raja
- College of Marine Life Sciences, Ocean University of China, Qingdao, PR China
| | - Muhammad Arif
- College of Marine Life Sciences, Ocean University of China, Qingdao, PR China
| | - Chao Feng
- College of Marine Life Sciences, Ocean University of China, Qingdao, PR China
| | - Shah Zeenat
- College of Marine Life Sciences, Ocean University of China, Qingdao, PR China
| | - Chen-Guang Liu
- College of Marine Life Sciences, Ocean University of China, Qingdao, PR China
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47
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Jung Y, Jang WD. Recent approaches for clickable poly(2-oxazoline)-based functional stimuli-responsive polymers and related applications. Supramol Chem 2017. [DOI: 10.1080/10610278.2016.1269905] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yongseok Jung
- Department of Chemistry, Yonsei University, Seoul, Republic of Korea
| | - Woo-Dong Jang
- Department of Chemistry, Yonsei University, Seoul, Republic of Korea
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48
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Responsive Polymer Nanostructures. POLYMER-ENGINEERED NANOSTRUCTURES FOR ADVANCED ENERGY APPLICATIONS 2017. [DOI: 10.1007/978-3-319-57003-7_6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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49
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Shoji T, Sugo D, Nagasawa F, Murakoshi K, Kitamura N, Tsuboi Y. Highly Sensitive Detection of Organic Molecules on the Basis of a Poly(N-isopropylacrylamide) Microassembly Formed by Plasmonic Optical Trapping. Anal Chem 2016; 89:532-537. [DOI: 10.1021/acs.analchem.6b04024] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Tatsuya Shoji
- Division
of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Daiki Sugo
- Division
of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Fumika Nagasawa
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Kei Murakoshi
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Noboru Kitamura
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Yasuyuki Tsuboi
- Division
of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
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50
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Schmücker S, Kuckling D. Stimuli-responsive coil-rod-coil block copolymers synthesized by using a bis-alkoxyamine-functionalized poly(para-phenylene) macro initiator. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.10.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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