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Sedov V, Martyanov A, Popovich A, Savin S, Sovyk D, Tiazhelov I, Pasternak D, Mandal S, Ralchenko V. Microporous poly- and monocrystalline diamond films produced from chemical vapor deposited diamond-germanium composites. NANOSCALE ADVANCES 2023; 5:1307-1315. [PMID: 36866268 PMCID: PMC9972548 DOI: 10.1039/d2na00688j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
We report on a novel method for porous diamond fabrication, which is based on the synthesis of diamond-germanium composite films followed by etching of the Ge component. The composites were grown by microwave plasma assisted CVD in CH4-H2-GeH4 mixtures on (100) silicon, and microcrystalline- and single-crystal diamond substrates. The structure and the phase composition of the films before and after etching were analyzed with scanning electron microscopy and Raman spectroscopy. The films revealed a bright emission of GeV color centers due to diamond doping with Ge, as evidenced by photoluminescence spectroscopy. The possible applications of the porous diamond films include thermal management, surfaces with superhydrophobic properties, chromatography, supercapacitors, etc.
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Affiliation(s)
- Vadim Sedov
- Prokhorov General Physics Institute of the Russian Academy of Sciences Moscow 119991 Russia
| | - Artem Martyanov
- Prokhorov General Physics Institute of the Russian Academy of Sciences Moscow 119991 Russia
| | - Alexey Popovich
- Prokhorov General Physics Institute of the Russian Academy of Sciences Moscow 119991 Russia
- Kotel'nikov Institute of Radio Engineering and Electronics RAS Fryazino 141120 Russia
| | - Sergey Savin
- MIREA - Russian Technological University Moscow 119454 Russia
| | - Dmitry Sovyk
- Prokhorov General Physics Institute of the Russian Academy of Sciences Moscow 119991 Russia
| | - Ivan Tiazhelov
- Prokhorov General Physics Institute of the Russian Academy of Sciences Moscow 119991 Russia
| | - Dmitrii Pasternak
- Prokhorov General Physics Institute of the Russian Academy of Sciences Moscow 119991 Russia
| | - Soumen Mandal
- School of Physics and Astronomy, Cardiff University CF24 3AA Cardiff UK
| | - Victor Ralchenko
- Prokhorov General Physics Institute of the Russian Academy of Sciences Moscow 119991 Russia
- Harbin Institute of Technology Harbin 150001 P. R. China
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2
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Molecularly Imprinted Ligand-Free Nanogels for Recognizing Bee Venom-Originated Phospholipase A2 Enzyme. Polymers (Basel) 2022; 14:polym14194200. [PMID: 36236149 PMCID: PMC9571764 DOI: 10.3390/polym14194200] [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] [Received: 09/19/2022] [Revised: 10/03/2022] [Accepted: 10/05/2022] [Indexed: 11/16/2022] Open
Abstract
In this study, ligand-free nanogels (LFNGs) as potential antivenom mimics were developed with the aim of preventing hypersensitivity and other side effects following massive bee attacks. For this purpose, poly (ethylene glycol) diacrylate was chosen as a main synthetic biocompatible matrix to prepare the experimental LFNGs. The overall concept uses inverse mini-emulsion polymerization as the main route to deliver nanogel caps with complementary cavities for phospholipase A2 (PLA2) from bee venom, created artificially with the use of molecular imprinting (MI) technologies. The morphology and the hydrodynamic features of the nanogels were confirmed by transmission electron microscopy (TEM) and dynamic light scattering (DLS) analysis. The following rebinding experiments evidenced the specificity of molecularly imprinted LFNG for PLA2, with rebinding capacities up to 8-fold higher compared to the reference non-imprinted nanogel, while the in vitro binding assays of PLA2 from commercial bee venom indicated that such synthetic nanogels are able to recognize and retain the targeted PLA2 enzyme. The results were finally collaborated with in vitro cell-viability experiments and resulted in a strong belief that such LFNG may actually be used for future therapies against bee envenomation.
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3
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Mun SJ, Ko D, Kim HU, Han Y, Roh YH, Kim BG, Na HB, Bong KW. Photopolymerization-Based Synthesis of Uniform Magnetic Hydrogels and Colorimetric Glucose Detection. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4401. [PMID: 33023165 PMCID: PMC7579115 DOI: 10.3390/ma13194401] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 09/29/2020] [Accepted: 09/30/2020] [Indexed: 01/03/2023]
Abstract
Magnetic hydrogels have been commonly used in biomedical applications. As magnetite nanoparticles (MNPs) exhibit peroxidase enzyme-like activity, magnetic hydrogels have been actively used as signal transducers for biomedical assays. Droplet microfluidics, which uses photoinitiated polymerization, is a preferred method for the synthesis of magnetic hydrogels. However, light absorption by MNPs makes it difficult to obtain fully polymerized and homogeneous magnetic hydrogels through photoinitiated polymerization. Several methods have been reported to address this issue, but few studies have focused on investigating the light absorption properties of photoinitiators. In this study, we developed a simple method for the synthesis of poly(ethylene glycol) (PEG)-based uniform magnetic hydrogels that exploits the high ultraviolet absorption of a photoinitiator. Additionally, we investigated this effect on shape deformation and structural uniformity of the synthesized magnetic hydrogels. Two different photoinitiators, Darocur 1173 and lithium phenyl (2,4,6-trimethylbenzoyl) phosphinate (LAP), with significantly different UV absorption properties were evaluated based on the synthesis of magnetic hydrogels. The magnetic characteristics of the PEG-stabilized MNPs in hydrogels were investigated with a vibrating sample magnetometer. Finally, the colorimetric detection of hydrogen peroxide and glucose was conducted based on the enzyme-like property of MNPs and repeated several times to observe the catalytic activity of the magnetic hydrogels.
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Affiliation(s)
- Seok Joon Mun
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (S.J.M.); (H.U.K.); (Y.H.R.)
| | - Donghyun Ko
- Department of Chemical Engineering, Myongji University, Yongin, Gyeonggi-do 17058, Korea; (D.K.); (Y.H.); (B.-G.K.)
| | - Hyeon Ung Kim
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (S.J.M.); (H.U.K.); (Y.H.R.)
| | - Yujin Han
- Department of Chemical Engineering, Myongji University, Yongin, Gyeonggi-do 17058, Korea; (D.K.); (Y.H.); (B.-G.K.)
| | - Yoon Ho Roh
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (S.J.M.); (H.U.K.); (Y.H.R.)
| | - Bong-Geun Kim
- Department of Chemical Engineering, Myongji University, Yongin, Gyeonggi-do 17058, Korea; (D.K.); (Y.H.); (B.-G.K.)
| | - Hyon Bin Na
- Department of Chemical Engineering, Myongji University, Yongin, Gyeonggi-do 17058, Korea; (D.K.); (Y.H.); (B.-G.K.)
| | - Ki Wan Bong
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (S.J.M.); (H.U.K.); (Y.H.R.)
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Wu X, Teng F, Libera M. Functional Changes during Electron-Beam Lithography of Biotinylated Poly(ethylene glycol) Thin Films. ACS Macro Lett 2019; 8:1252-1256. [PMID: 35651171 DOI: 10.1021/acsmacrolett.9b00585] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In contrast to photolithography where particular wavelengths of light can couple to specific photochemistries, electron-beam lithography can drive competing chemistries. To separate surface-grafting, cross-linking, and chemical functionality, we studied the effects of 2 keV electrons on thin films of poly(ethylene glycol) end-functionalized with hydroxyls (PEG-OH) or biotins (PEG-B). Similarities in the dose-dependent thickness changes of the patterned PEGs indicate that surface grafting and cross-linking primarily involve the ethylene oxide main chain. While higher doses create thicker patterns with more biotin, the concurrent increase in thiol reactivity indicates that cross-linking competes with biotin degradation. The dose window for optimal e-beam patterning of biotinylated PEG is very narrow. Biotin is entirely consumed at higher doses. Its modified functionality is reactive with 5-((2-(and-3)-S-(acetylmercapto) succinoyl) amino) (SAMSA). This effect creates a dose-dependent orthogonal functionality that can be patterned from a single precursor thin film.
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Affiliation(s)
- Xinpei Wu
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Feiyue Teng
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
| | - Matthew Libera
- Department of Chemical Engineering & Materials Science, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
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5
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Heydarifard S, Gao W, Fatehi P. Impact of Counter Ions of Cationic Monomers on the Production and Characteristics of Chitosan-Based Hydrogel. ACS OMEGA 2019; 4:15087-15096. [PMID: 31552352 PMCID: PMC6751722 DOI: 10.1021/acsomega.9b01953] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 08/16/2019] [Indexed: 06/10/2023]
Abstract
Chitosan-based hydrogel has received considerable interests because of its appealing properties and applications in many areas. The primary objective of this work was to produce novel cationic chitosan-based hydrogels via polymerizing chitosan with two cationic monomers of the same structure but with different counter ions [2-(methacryloyloxy)ethyl]trimethylammonium methyl sulfate (METMS) and [2-(methacryloyloxy)ethyl]trimethylammonium chloride (METAC). Polymerization of chitosan with the cationic monomers performed under the conditions of 50 °C, 5 h, 7 pH, and 2/1 mol/mol monomer/chitosan led to chitosan-METMS and -METAC with the cationic charge densities of 3.22 and 2.88 mequiv/g, respectively. Elemental analysis, gel permeation chromatography, Fourier transform infrared, X-ray diffraction, and differential scanning calorimetry analyses were used to confirm the impact of counter ions of cationic monomers (i.e., polarizability of monomers) on their polymerization performance and the characteristics of induced chitosan-based hydrogels. Also, the results of this work postulated that the counter ions associated with the monomers could dramatically impact the water uptake and swelling properties of the generated chitosan-based hydrogels as well as their performance in adsorbing an anionic dye from a simulated solution.
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Park JE, Kang HS, Baek J, Park TH, Oh S, Lee H, Koo M, Park C. Rewritable, Printable Conducting Liquid Metal Hydrogel. ACS NANO 2019; 13:9122-9130. [PMID: 31407567 DOI: 10.1021/acsnano.9b03405] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The development of high-performance printable electrical circuits, particularly based on liquid metals, is fundamental for device interconnection in flexible electronics, motivating numerous attempts to develop a variety of alloys and their composites. Despite their great potential, rewritable and printable electronic circuits based on liquid metals are still manufactured on demand. In this study, we demonstrate liquid metal-based hydrogels suitable for rewritable, printable electrical circuits. Our liquid metal hydrogels are based on sedimentation-induced composites of eutectic gallium-indium (EGaIn) particles in poly(ethylene glycol) diacrylate (PEGDA). The EGaIn particles are vertically phase-segregated in the PEGDA. When a composite surface with high EGaIn content is gently scratched, the surface covering PEGDA is removed, followed by the rupture of the native oxide layers of the particles, and the exposed EGaIn becomes conductive. The subsequent water-driven swelling of PEGDA on the scratched surface completely erases the conductive circuit, causing the system to reset. Our friction-responsive liquid metal hydrogel exhibits writing-erasing endurance for 20 cycles, with a dramatic change in the electrical resistance from metal (∼1 Ω) to insulator (∼107 Ω). By employing surface friction pen printing, we demonstrate mechanically flexible, rewritable, printable electrical conductors suitable for displays.
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7
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Hocken A, Yang Y, Beyer FL, Morgan BF, Kline K, Piper T, Green MD. Photocurable Poly(ethylene glycol) Diacrylate Resins with Variable Silica Nanoparticle Loading. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b02068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexis Hocken
- Department of Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
| | - Yi Yang
- Department of Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
| | - Frederick L. Beyer
- U.S. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Brian F. Morgan
- U.S. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Katelyn Kline
- Department of Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
| | | | - Matthew D. Green
- Department of Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
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Huang PJ, Hwangbo M, Chen Z, Liu Y, Kameoka J, Chu KH. Reusable Functionalized Hydrogel Sorbents for Removing Long- and Short-Chain Perfluoroalkyl Acids (PFAAs) and GenX from Aqueous Solution. ACS OMEGA 2018; 3:17447-17455. [PMID: 31458350 PMCID: PMC6644158 DOI: 10.1021/acsomega.8b02279] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/23/2018] [Indexed: 05/06/2023]
Abstract
Per- and poly-fluoroalkyl substances (PFASs) are man-made chemicals that are toxic and widely detected in the environment, including drinking water sources. A cost-effective treatment process for PFASs is currently not available. We developed reusable hydrogel sorbents to remove long- and short-chain perfluoroalkyl acids and 2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)propanoic acid (GenX), which is are emerging PFAS. Through fluoridation and amination of poly(ethylene glycol) diacrylate (PEGDA), the newly synthesized sorbents can sorb the five targeted PFASs (perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), perfluorobutanesulfonic acid (PFBS), and perfluorobutanoic acid (PFBA) and GenX) to different degrees from aqueous solution. Aminated PEGDA showed the highest sorption capacity for all five PFASs, particularly for PFBA and PFBS. The bifunctionalized PEGDA showed higher capacities for PFOA and PFOS, suggesting that both hydrophobic interactions and charges contribute to the sorption. Both aminated and bifunctionalized sorbents can remove GenX from water, with the highest sorption capacity of 98.7 μmol g aminated PEGDA-1 within 6 h. The absorbed PFASs on the sorbents were observed and characterized by Fourier-transform infrared spectroscopy. The spent sorbents were reusable after readily regenerated with 70% methanol contained 1% NaCl.
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Affiliation(s)
- Po-Jung Huang
- Department
of Materials Science and Engineering, Texas
A&M University, College Station, Texas 77840, United States
- Institute
of Environmental Engineering, National Sun
Yat-sen University, Kaohsiung 80424, Taiwan
| | - Myung Hwangbo
- Zachry Department of Civil Engineering and Department of Electrical and Computer
Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Zheyuan Chen
- Zachry Department of Civil Engineering and Department of Electrical and Computer
Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Yina Liu
- Geochemical
and Environmental Research Group, Texas
A&M University, College Station, Texas 77845, United States
| | - Jun Kameoka
- Department
of Materials Science and Engineering, Texas
A&M University, College Station, Texas 77840, United States
- Zachry Department of Civil Engineering and Department of Electrical and Computer
Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Kung-Hui Chu
- Zachry Department of Civil Engineering and Department of Electrical and Computer
Engineering, Texas A&M University, College Station, Texas 77843, United States
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Alev-Tuzuner B, Beyler-Cigil A, Vezir Kahraman M, Yarat A. PEG-based hydrogel-coated test strip for on-site urea determination. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2018.1482460] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Burcin Alev-Tuzuner
- Department of Basic Medical Sciences, Biochemistry, Faculty of Dentistry, Marmara University, Maltepe, Turkey, Istanbul
| | - Asli Beyler-Cigil
- Department of Chemistry, Faculty of Arts and Sciences, Marmara University, Goztepe, Turkey Istanbul
- Department of Chemistry, Faculty of Arts and Sciences, Amasya University, Amasya, Turkey
| | - Memet Vezir Kahraman
- Department of Chemistry, Faculty of Arts and Sciences, Marmara University, Goztepe, Turkey Istanbul
| | - Aysen Yarat
- Department of Basic Medical Sciences, Biochemistry, Faculty of Dentistry, Marmara University, Maltepe, Turkey, Istanbul
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Day JR, David A, Kim J, Farkash EA, Cascalho M, Milašinović N, Shikanov A. The impact of functional groups of poly(ethylene glycol) macromers on the physical properties of photo-polymerized hydrogels and the local inflammatory response in the host. Acta Biomater 2018; 67:42-52. [PMID: 29242160 DOI: 10.1016/j.actbio.2017.12.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 12/01/2017] [Accepted: 12/04/2017] [Indexed: 01/03/2023]
Abstract
Poly(ethylene glycol) (PEG) can be functionalized and modified with various moieties allowing for a multitude of cross-linking chemistries. Here, we investigate how vinyl sulfone, acrylate, and maleimide functional end groups affect hydrogel formation, physical properties, viability of encapsulated cells, post-polymerization modification, and inflammatory response of the host. We have shown that PEG-VS hydrogels, in the presence of a co-monomer, N-vinyl-2-pyrrolidone (NVP), form more efficiently than PEG-Ac and PEG-Mal hydrogels, resulting in superior physical properties after 6 min of ultraviolet light exposure. PEG-VS hydrogels exhibited hydrolytic stability and non-fouling characteristics, as well as the ability to be modified with biological motifs, such as RGD, after polymerization. Additionally, unmodified PEG-VS hydrogels resulted in lesser inflammatory response, cellular infiltration, and macrophage recruitment after implantation for 28 days in mice. These findings show that altering the end group chemistry of PEG macromer impacts characteristics of the photo-polymerized network. We have developed a tunable non-degradable PEG system that is conducive for cell or tissue encapsulation and evokes a minimal inflammatory response, which could be utilized for future immunoisolation applications. STATEMENT OF SIGNIFICANCE The objective of this study was to develop a tunable non-degradable PEG system that is conducive for encapsulation and evokes a minimal inflammatory response, which could be utilized for immunoisolation applications. This study has demonstrated that reactive functional groups of the PEG macromers impact free radical mediated network formation. Here, we show PEG-VS hydrogels meet the design criteria for an immunoisolating device as PEG-VS hydrogels form efficiently via photo-polymerization, impacting bulk properties, was stable in physiological conditions, and elicited a minimal inflammatory response. Further, NVP can be added to the precursor solution to expedite the cross-linking process without impacting cellular response upon encapsulation. These findings present an additional approach/chemistry to encapsulate cells or tissue for immunoisolation applications.
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Pelras T, Glass S, Scherzer T, Elsner C, Schulze A, Abel B. Transparent Low Molecular Weight Poly(Ethylene Glycol) Diacrylate-Based Hydrogels as Film Media for Photoswitchable Drugs. Polymers (Basel) 2017; 9:E639. [PMID: 30965940 PMCID: PMC6418822 DOI: 10.3390/polym9120639] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/16/2017] [Accepted: 11/18/2017] [Indexed: 12/17/2022] Open
Abstract
Hydrogels have shown a great potential as materials for drug delivery systems thanks to their usually excellent bio-compatibility and their ability to trap water-soluble organic molecules in a porous network. In this study, poly(ethylene glycol)-based hydrogels containing a model dye were synthesized by ultraviolet (UV-A) photopolymerization of low-molecular weight macro-monomers and the material properties (dye release ability, transparency, morphology, and polymerization kinetics) were studied. Real-time infrared measurements revealed that the photopolymerization of the materials was strongly limited when the dye was added to the uncured formulation. Consequently, the procedure was adapted to allow for the formation of sufficiently cured gels that are able to capture and later on to release dye molecules in phosphate-buffered saline solution within a few hours. Due to the transparency of the materials in the 400⁻800 nm range, the hydrogels are suitable for the loading and excitation of photoactive molecules. These can be uptaken by and released from the polymer matrix. Therefore, such materials may find applications as cheap and tailored materials in photodynamic therapy (i.e., light-induced treatment of skin infections by bacteria, fungi, and viruses using photoactive drugs).
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Affiliation(s)
- Théophile Pelras
- Leibniz-Institute of Surface Modification, Permoserstraβe 15, 04318 Leipzig, Germany.
- Key Center for Polymers and Colloids, School of Chemistry, University of Sydney, Sydney, NSW 2006, Australia.
| | - Sarah Glass
- Leibniz-Institute of Surface Modification, Permoserstraβe 15, 04318 Leipzig, Germany.
| | - Tom Scherzer
- Leibniz-Institute of Surface Modification, Permoserstraβe 15, 04318 Leipzig, Germany.
| | - Christian Elsner
- Leibniz-Institute of Surface Modification, Permoserstraβe 15, 04318 Leipzig, Germany.
| | - Agnes Schulze
- Leibniz-Institute of Surface Modification, Permoserstraβe 15, 04318 Leipzig, Germany.
| | - Bernd Abel
- Leibniz-Institute of Surface Modification, Permoserstraβe 15, 04318 Leipzig, Germany.
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Pirani F, Sharma N, Moreno-Cencerrado A, Fossati S, Petri C, Descrovi E, Toca-Herrera JL, Jonas U, Dostalek J. Optical Waveguide-Enhanced Diffraction for Observation of Responsive Hydrogel Nanostructures. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201600400] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Federica Pirani
- AIT-Austrian Institute of Technology; Biosensor Technologies; Muthgasse, 11/2 1190 Vienna Austria
- Centre for Space Human Robotics; Istituto Italiano di Tecnologia; Corso Trento, 21 10129 Torino Italy
- Dipartimento di Scienza Applicata e Tecnologia; Politecnico di Torino; C.so Duca degli Abruzzi 24 10129 Torino Italy
| | - Nityanand Sharma
- AIT-Austrian Institute of Technology; Biosensor Technologies; Muthgasse, 11/2 1190 Vienna Austria
- Nanyang Technological University; Centre for Biomimetic Sensor Science; School of Materials Science and Engineering; 50 Anyang Drive Singapore 637553 Singapore
| | - Alberto Moreno-Cencerrado
- Institute for Biophysics; Department of Nanobiotechnology; University of Natural Resources and Life Sciences Vienna (BOKU); Muthgasse 11 Vienna 1190 Austria
| | - Stefan Fossati
- AIT-Austrian Institute of Technology; Biosensor Technologies; Muthgasse, 11/2 1190 Vienna Austria
| | - Christian Petri
- Macromolecular Chemistry; Department Chemistry-Biology; University of Siegen; Adolf Reichwein-Strasse 2 Siegen 57076 Germany
| | - Emiliano Descrovi
- Dipartimento di Scienza Applicata e Tecnologia; Politecnico di Torino; C.so Duca degli Abruzzi 24 10129 Torino Italy
| | - José L. Toca-Herrera
- Institute for Biophysics; Department of Nanobiotechnology; University of Natural Resources and Life Sciences Vienna (BOKU); Muthgasse 11 Vienna 1190 Austria
| | - Ulrich Jonas
- Macromolecular Chemistry; Department Chemistry-Biology; University of Siegen; Adolf Reichwein-Strasse 2 Siegen 57076 Germany
- Foundation for Research and Technology Hellas (FORTH); P.O. Box 1527 71110 Heraklion Crete Greece
| | - Jakub Dostalek
- AIT-Austrian Institute of Technology; Biosensor Technologies; Muthgasse, 11/2 1190 Vienna Austria
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Kong XB, Tang QY, Chen XY, Tu Y, Sun SZ, Sun ZL. Polyethylene glycol as a promising synthetic material for repair of spinal cord injury. Neural Regen Res 2017; 12:1003-1008. [PMID: 28761436 PMCID: PMC5514851 DOI: 10.4103/1673-5374.208597] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Polyethylene glycol is a synthetic, biodegradable, and water-soluble polyether. Owing to its good biological and material properties, polyethylene glycol shows promise in spinal cord tissue engineering applications. Although studies have examined repairing spinal cord injury with polyethylene glycol, these compelling findings have not been recently reviewed or evaluated as a whole. Thus, we herein review and summarize the findings of studies conducted both within and beyond China that have examined the repair of spinal cord injury using polyethylene glycol. The following summarizes the results of studies using polyethylene glycol alone as well as coupled with polymers or hydrogels: (1) polyethylene glycol as an adjustable biomolecule carrier resists nerve fiber degeneration, reduces the inflammatory response, inhibits vacuole and scar formation, and protects nerve membranes in the acute stage of spinal cord injury. (2) Polyethylene glycol-coupled polymers not only promote angiogenesis but also carry drugs or bioactive molecules to the injury site. Because such polymers cross both the blood-spinal cord and blood-brain barriers, they have been widely used as drug carriers. (3) Polyethylene glycol hydrogels have been used as supporting substrates for the growth of stem cells after injury, inducing cell migration, proliferation, and differentiation. Simultaneously, polyethylene glycol hydrogels isolate or reduce local glial scar invasion, promote and guide axonal regeneration, cross the transplanted area, and re-establish synaptic connections with target tissue, thereby promoting spinal cord repair. On the basis of the reviewed studies, we conclude that polyethylene glycol is a promising synthetic material for use in the repair of spinal cord injury.
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Affiliation(s)
- Xian-Bin Kong
- Department of Brain, Affiliated Hospital of China Logistics College of People's Armed Police Forces, Tianjin, China.,Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Qiu-Yan Tang
- Tianjin Key Laboratory of Neurological Trauma Repair, Tianjin, China
| | - Xu-Yi Chen
- Tianjin Key Laboratory of Neurological Trauma Repair, Tianjin, China
| | - Yue Tu
- Tianjin Key Laboratory of Neurological Trauma Repair, Tianjin, China
| | - Shi-Zhong Sun
- Tianjin Key Laboratory of Neurological Trauma Repair, Tianjin, China
| | - Zhong-Lei Sun
- Jinzhou Medical University, Jinzhou, Liaoning Province, China
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Lee JS, Song J, Kim SO, Kim S, Lee W, Jackman JA, Kim D, Cho NJ, Lee J. Multifunctional hydrogel nano-probes for atomic force microscopy. Nat Commun 2016; 7:11566. [PMID: 27199165 PMCID: PMC4876479 DOI: 10.1038/ncomms11566] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Accepted: 04/08/2016] [Indexed: 11/10/2022] Open
Abstract
Since the invention of the atomic force microscope (AFM) three decades ago, there have been numerous advances in its measurement capabilities. Curiously, throughout these developments, the fundamental nature of the force-sensing probe—the key actuating element—has remained largely unchanged. It is produced by long-established microfabrication etching strategies and typically composed of silicon-based materials. Here, we report a new class of photopolymerizable hydrogel nano-probes that are produced by bottom-up fabrication with compressible replica moulding. The hydrogel probes demonstrate excellent capabilities for AFM imaging and force measurement applications while enabling programmable, multifunctional capabilities based on compositionally adjustable mechanical properties and facile encapsulation of various nanomaterials. Taken together, the simple, fast and affordable manufacturing route and multifunctional capabilities of hydrogel AFM nano-probes highlight the potential of soft matter mechanical transducers in nanotechnology applications. The fabrication scheme can also be readily utilized to prepare hydrogel cantilevers, including in parallel arrays, for nanomechanical sensor devices. Atomic force microscopy typically employs hard tips to map the surface topology of a sample, with sub-nanometre resolution. Here, the authors instead develop softer hydrogel probes, which show potential for multifunctional measurement capabilities beyond that of conventional systems.
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Affiliation(s)
- Jae Seol Lee
- Department of Mechanical Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul 04107, South Korea
| | - Jungki Song
- Department of Mechanical Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul 04107, South Korea
| | - Seong Oh Kim
- School of Materials Science and Engineering and Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore
| | - Seokbeom Kim
- Department of Mechanical Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul 04107, South Korea
| | - Wooju Lee
- Department of Mechanical Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul 04107, South Korea
| | - Joshua A Jackman
- School of Materials Science and Engineering and Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore
| | - Dongchoul Kim
- Department of Mechanical Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul 04107, South Korea
| | - Nam-Joon Cho
- School of Materials Science and Engineering and Centre for Biomimetic Sensor Science, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore.,School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Jungchul Lee
- Department of Mechanical Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul 04107, South Korea
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Mancini RJ, Paluck SJ, Bat E, Maynard HD. Encapsulated Hydrogels by E-beam Lithography and Their Use in Enzyme Cascade Reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4043-51. [PMID: 27078573 PMCID: PMC4852853 DOI: 10.1021/acs.langmuir.6b00560] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Electron beam (e-beam) lithography was employed to prepare one protein immobilized hydrogel encapsulated inside another by first fabricating protein-reactive hydrogels of orthogonal reactivity and subsequently conjugating the biomolecules. Exposure of thin films of eight arm star poly(ethylene glycol) (PEG) functionalized with biotin (Biotin-PEG), alkyne (Alkyne-PEG) or aminooxy (AO-PEG) end-groups to e-beam radiation resulted in cross-linked hydrogels with the respective functionality. It was determined via confocal microscopy that a nominal size exclusion effect exists for streptavidin immobilized on Biotin-PEG hydrogels of feature sizes ranging from 5 to 40 μm. AO-PEG was subsequently patterned as an encapsulated core inside a contiguous outer shell of Biotin-PEG. Similarly, Alkyne-PEG was patterned as a core inside an AO-PEG shell. The hydrogel reactive end-groups were conjugated to dyes or proteins of complementary reactivity, and the three-dimensional (3-D) spatial orientation was determined for both configurations using confocal microscopy. The enzyme glucose oxidase (GOX) was immobilized in the core of the encapsulated Alkyne-PEG core/ AO-PEG shell architecture, and horseradish peroxidase (HRP) was conjugated to the shell periphery. Bioactivity for the HRP-GOX enzyme pair was observed in this encapsulated configuration by demonstrating that the enzyme pair was capable of enzyme cascade reactions.
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16
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Epidermal growth factor loaded heparin-based hydrogel sheet for skin wound healing. Carbohydr Polym 2016; 147:251-260. [PMID: 27178931 DOI: 10.1016/j.carbpol.2016.03.072] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 03/22/2016] [Accepted: 03/23/2016] [Indexed: 11/20/2022]
Abstract
A heparin-based hydrogel sheet composed of thiolated heparin and diacrylated poly (ethylene glycol) was prepared via photo polymerization and human epidermal growth factor (hEGF) were loaded into it for the purpose of wound healing. It showed a sustained release profile of hEGF in vitro. In order to evaluate its function on wound healing in vivo, full thickness wounds were created on the dorsal surface of mice. Application of hEGF loaded heparin-based hydrogel sheet accelerated the wound closure compared to the non-treated control group, hEGF solution, and hEGF loaded PEG hydrogel sheet. Histological and immunohistological examinations also demonstrated an advanced granulation tissue formation, capillary formation, and epithelialization in wounds treated by hEGF loaded heparin-based hydrogel compared to other groups, and no biocompatibility issue was observed. In conclusion, the delivery of hEGF using the heparin-based hydrogel could accelerate the skin wound healing process.
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17
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Secret E, Kelly SJ, Crannell KE, Andrew JS. Enzyme-responsive hydrogel microparticles for pulmonary drug delivery. ACS APPLIED MATERIALS & INTERFACES 2014; 6:10313-21. [PMID: 24926532 DOI: 10.1021/am501754s] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Poly(ethylene glycol) based hydrogel microparticles were developed for pulmonary drug delivery. Hydrogels are particularly attractive for pulmonary delivery because they can be size engineered for delivery into the bronchi, yet also swell upon reaching their destination to avoid uptake and clearance by alveolar macrophages. To develop enzyme-responsive hydrogel microparticles for pulmonary delivery a new synthesis method based on a solution polymerization was developed. This method produces spherical poly(ethylene glycol) (PEG) microparticles from high molecular weight poly(ethylene glycol) diacrylate (PEGDA)-based precursors that incorporate peptides in the polymer chain. Specifically, we have synthesized hydrogel microparticles that degrade in response to matrix metalloproteinases that are overexpressed in pulmonary diseases. Small hydrogel microparticles with sizes suitable for lung delivery by inhalation were obtained from solid precursors when PEGDA was dissolved in water at a high concentration. The average diameter of the particles was between 2.8 and 4 μm, depending on the molecular weight of the precursor polymer used and its concentration in water. The relation between the physical properties of the particles and their enzymatic degradation is also reported, where an increased mesh size corresponds to increased degradation.
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Affiliation(s)
- Emilie Secret
- Department of Materials Science and Engineering, University of Florida , Gainesville, Florida 32611, United States
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18
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Palankar R, Medvedev N, Rong A, Delcea M. Fabrication of quantum dot microarrays using electron beam lithography for applications in analyte sensing and cellular dynamics. ACS NANO 2013; 7:4617-28. [PMID: 23597071 DOI: 10.1021/nn401424y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Quantum dot (QD) based micro-/nanopatterned arrays are of broad interest in applications ranging from electronics, photonics, to sensor devices for biomedical purposes. Here, we report on a rapid, physico-chemically mild approach to generate high fidelity micropattern arrays of prefunctionalized water-soluble quantum dots using electron beam lithography. We show that such patterns retain their fluorescence and bioaffinity upon electron beam lithography and, based on the streptavidin-biotin interaction, allow for detection of proteins, colloidal gold nanoparticles and magnetic microparticles. Furthermore, we demonstrate the applicability of QD based microarray patterns differing in their shape (circles, squares, grid-like), size (from 1 to 10 μm) and pitch distance to study the adhesion, spreading and migration of human blood derived neutrophils. Using live cell confocal fluorescence microscopy, we show that pattern geometry and pitch distance influence the adhesion, spreading and migratory behavior of neutrophils. Research reported in this work paves the way for producing QD microarrays with multiplexed functionalities relevant for applications in analyte sensing and cellular dynamics.
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Affiliation(s)
- Raghavendra Palankar
- Nanostructure Group, ZIK HIKE - Center for Innovation Competence , Humoral Immune Reactions in Cardiovascular Diseases, Ernst-Moritz-Arndt-Universität Greifswald, 17489 Greifswald, Germany.
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19
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Tucker RM, Parcher BW, Jones EF, Desai TA. Single-injection HPLC method for rapid analysis of a combination drug delivery system. AAPS PharmSciTech 2012; 13:605-10. [PMID: 22535518 DOI: 10.1208/s12249-012-9780-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 03/28/2012] [Indexed: 01/06/2023] Open
Abstract
Developing combination drug delivery systems (CDDS) is a challenging but necessary task to meet the needs of complex therapy regimes for patients. As the number of multi-drug regimens being administered increases, so does the difficulty of characterizing the CDDS as a whole. We present a single-step method for quantifying three model therapeutics released from a model hydrogel scaffold using high-performance liquid chromatography (HPLC). Poly(ethylene glycol) dimethacrylate (PEGDMA) hydrogel tablets were fabricated via photoinitiated crosslinking and subsequently loaded with model active pharmaceutical ingredients (APIs), namely, porcine insulin (PI), fluorescein isothiocyanate-labeled bovine serum albumin (FBSA), prednisone (PSE), or a combination of all three. The hydrogel tablets were placed into release chambers and sampled over 21 days, and APIs were quantified using the method described herein. Six compounds were isolated and quantified in total. Release kinetics based on chemical properties of the APIs did not give systematic relationships; however, PSE was found to have improved device loading versus PI and FBSA. Rapid analysis of three model APIs released from a PEGDMA CDDS was achieved with a direct, single-injection HPLC method. Development of CDDS platforms is posited to benefit from such analytical approaches, potentially affording innovative solutions to complex disease states.
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20
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Zhang Y, Gemeinhart RA. Improving matrix metalloproteinase-2 specific response of a hydrogel system using electrophoresis. Int J Pharm 2012; 429:31-7. [PMID: 22440150 DOI: 10.1016/j.ijpharm.2012.03.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Revised: 02/25/2012] [Accepted: 03/06/2012] [Indexed: 11/19/2022]
Abstract
Matrix metalloproteinases (MMPs) overexpression plays a critical role in cancer invasion and metastasis. We utilized this key feature of tumor microenvironment to develop a disease-stimuli triggered drug delivery system. Poly(acrylic acid) hydrogels were synthesized by UV polymerization and pendant MMP-2 sensitive peptides (Gly-Pro-Leu-Gly-Val-Arg-Gly-Lys) conjugated throughout using EDC/sulfo-NHS chemistry. There were significantly more peptides released in the presence of MMP-2 compared with the control groups. The released peptide fragments were analyzed by HPLC and MALDI-MS and confirmed to be the expected fragments. In order to avoid nonspecific release of nonconjugated (i.e. unreacted) peptides, a novel method of electrophoretic washing was developed disrupting the strong electrostatic interactions between the peptides and the pendant groups of the hydrogel. After electrophoresis, the nonspecific peptide release in the absence of MMP-2 was minimized. This newly developed purification system significantly improved the control of release to be in response of the magnitude of the stimuli, i.e. MMP. Specifically, peptides were released proportionally to the concentration of MMP-2 present. Now that many of the design parameters have been examined, anticancer drugs will be conjugated to the MMP sensitive peptide linkers with the goal of implantation in a tumor void releasing anticancer reagent in response to elevated level of MMPs.
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Affiliation(s)
- Yu Zhang
- Department of Biopharmaceutical Sciences, University of Illinois, Chicago, IL 60612-7231, USA
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