1
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Siuzdak K, Haryński Ł, Wawrzyniak J, Grochowska K. Review on robust laser light interaction with titania – Patterning, crystallisation and ablation processes. PROG SOLID STATE CH 2021. [DOI: 10.1016/j.progsolidstchem.2020.100297] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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2
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Wu CT, Utsunomiya T, Ichii T, Sugimura H. Microstructured SiO x/COP Stamps for Patterning TiO 2 on Polymer Substrates via Microcontact Printing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:10933-10940. [PMID: 32864972 DOI: 10.1021/acs.langmuir.0c01558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Microcontact printing (μCP) techniques have sparked a surge of interests in microfabrication since they help produce arrays on a wide range of target substrates in a facile and efficient manner. Polydimethylsiloxane (PDMS), as a well-established material for stamps, has constraints resulting from its hydrophobicity and softness, and the replication of PDMS stamps usually requires rigid masters or processes using a photoresist. Herein, a novel μCP stamp based on cyclo-olefin polymer (COP) is produced through vacuum ultraviolet (VUV) lithography. 2,4,6,8-Tetramethylcyclotetrasiloxane is selectively deposited at the affinity-patterns on the COP surface, and these patterned siloxane films are converted into SiOx meanwhile protecting the COP beneath them from the VUV photoetching. By this means, a patterned relief is fabricated on the COP plates, resulting in a hydrophilic SiOx/COP μCP stamp with punch heights of ∼180 nm. The novelty arises from the simplicity of the master- and photoresist-free microstructuring, and the higher stiffness of SiOx/COP stamps prevents the deformation during pressing. Finally, an example μCP is given to transfer titania precursor gel and produce TiO2 micropatterns on flexible polymer substrates. The SiOx/COP stamps and the μCP of TiO2 provide simple and cost-effective patterning techniques, which should contribute to the future design and creation of flexible devices.
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Affiliation(s)
- Cheng-Tse Wu
- Department of Materials Science and Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Toru Utsunomiya
- Department of Materials Science and Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Takashi Ichii
- Department of Materials Science and Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hiroyuki Sugimura
- Department of Materials Science and Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan
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3
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Li N, Pranantyo D, Kang ET, Wright DS, Luo HK. A Simple Drop-and-Dry Approach to Grass-Like Multifunctional Nanocoating on Flexible Cotton Fabrics Using In Situ-Generated Coating Solution Comprising Titanium-Oxo Clusters and Silver Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2020; 12:12093-12100. [PMID: 32057229 DOI: 10.1021/acsami.9b22768] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Multifunctional nanocoatings have been of central importance in various technological fields, yet their fabrication, especially on flexible substrates, still remains a persistent challenge to date. We herein demonstrate a mild single-step drop-and-dry approach to the in situ growth of hierarchical grass-like nanostructures on flexible cotton fabrics. A precursor solution comprising titanium-oxo clusters [Ti18MnO30(OEt)20(MnPhen)3] (Phen = 1,10-phenanthroline) and AgNO3 is employed wherein Ag+ cations are in situ-reduced to silver nanoparticles (AgNPs). Drop-casting onto cotton fabrics under mild conditions induces the in situ growth of the heterogeneous grass-like assembly, and each constituent nanofibrous 'grass leaf' incorporates AgNPs both on the surface and embedded in the interior. The hierarchical morphology and heterogeneous composition of these grass-like nanostructures impart the coated cotton fabrics with enhanced antibacterial properties, robust hydrophobicity, and UV-blocking capability, which are features desired in textile materials but lacking in natural cotton.
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Affiliation(s)
- Ning Li
- Agency for Science, Technology and Research, Institute of Materials Research and Engineering, 2 Fusionopolis Way, #08-03, Innovis, 138634, Singapore
- Chemistry Department, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Dicky Pranantyo
- Department of Chemical & Biomolecular Engineering, National University of Singapore, Kent Ridge, 119260, Singapore
| | - En-Tang Kang
- Department of Chemical & Biomolecular Engineering, National University of Singapore, Kent Ridge, 119260, Singapore
| | - Dominic S Wright
- Chemistry Department, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - He-Kuan Luo
- Agency for Science, Technology and Research, Institute of Materials Research and Engineering, 2 Fusionopolis Way, #08-03, Innovis, 138634, Singapore
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4
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Micro-Patterning of Magnetron Sputtered Titanium Dioxide Coatings and Their Efficiency for Photocatalytic Applications. COATINGS 2020. [DOI: 10.3390/coatings10010068] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Titanium dioxide thin films were deposited onto sola-lime glass substrates by reactive magnetron sputtering. Fine stainless steel mesh sheets with different aperture sizes were applied as masks over glass substrates to allow the deposition of the coatings with micro-patterned structures and, therefore, enhanced surface area. Non-patterned titania films were deposited for comparison purposes. The titanium dioxide films were post-deposition annealed at 873 K for crystallinity development and then extensively analysed by a number of analytical techniques, including scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDX), optical and stylus profilometry, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-Vis spectroscopy. The photocatalytic activity of non-patterned and micro-patterned titania films was assessed under UV light irradiation by three different methods; namely methylene blue, stearic acid, and oleic acid degradation. The results revealed that the micro-patterned coatings significantly outperformed non-patterned titania in all types of photocatalytic tests, due to their higher values of surface area. Increasing the aperture of the stainless steel mesh resulted in lower photocatalytic activity and lower surface area values, compared to the coatings deposited through a smaller aperture mesh.
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5
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Wu CT, Soliman AIA, Utsunomiya T, Ichii T, Sugimura H. Formation of submicron-sized silica patterns on flexible polymer substrates based on vacuum ultraviolet photo-oxidation. RSC Adv 2019; 9:32313-32322. [PMID: 35530761 PMCID: PMC9072887 DOI: 10.1039/c9ra07256j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 09/30/2019] [Indexed: 11/21/2022] Open
Abstract
Formation of precise and high-resolution silica micropatterns on polymer substrates is of importance in surface structuring for flexible device fabrication of optics, microelectronic, and biotechnology. To achieve that, substrates modified with affinity-patterns serve as a strategy for site-selective deposition. In the present paper, vacuum ultraviolet (VUV) treatment is utilized to achieve spatially-controlled surface functionalization on a cyclo-olefin polymer (COP) substrate. An organosilane, 2,4,6,8-tetramethylcyclotetrasiloxane (TMCTS), preferentially deposits on the functionalized regions. Well-defined patterns of TMCTS are formed with a minimum feature of ∼500 nm. The secondary VUV/(O)-treatment converts TMCTS into SiO x , meanwhile etches the bare COP surface, forming patterned SiO x /COP microstructures with an average height of ∼150 nm. The resulting SiO x patterns retain a good copy of TMCTS patterns, which are also consistent with the patterns of photomask used in polymer affinity-patterning. The high quality SiO x patterns are of interests in microdevice fabrication, and the hydrophilicity contrast and adjustable heights reveal their potential application as a "stamp" for microcontact printing (μCP) techniques.
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Affiliation(s)
- Cheng-Tse Wu
- Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University Kyoto 606-8501 Japan +81-75-753-9131
| | - Ahmed I A Soliman
- Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University Kyoto 606-8501 Japan +81-75-753-9131.,Chemistry Department, Faculty of Science, Assiut University Assiut 71516 Egypt
| | - Toru Utsunomiya
- Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University Kyoto 606-8501 Japan +81-75-753-9131
| | - Takashi Ichii
- Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University Kyoto 606-8501 Japan +81-75-753-9131
| | - Hiroyuki Sugimura
- Department of Materials Science and Engineering, Graduate School of Engineering, Kyoto University Kyoto 606-8501 Japan +81-75-753-9131
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Takahashi M, Usui A, Eba H, Tajima K. Preparation of Patterned Ultrathin TiO 2 Films by Langmuir–Blodgett Method Using Mixed Monolayers of Octadecylamine and 1 H,1 H-Perfluoro-1-dodecanol. CHEM LETT 2017. [DOI: 10.1246/cl.170464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masashi Takahashi
- Department of Chemistry and Energy Engineering, Tokyo City University, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo 158-8557
| | - Akitoshi Usui
- Department of Chemistry and Energy Engineering, Tokyo City University, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo 158-8557
| | - Hiromi Eba
- Department of Chemistry and Energy Engineering, Tokyo City University, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo 158-8557
| | - Kazuo Tajima
- Project of 3-phase emulsion technology, Kanagawa University, 3-27 Rokkakubashi, Kanagawa-ku, Yokohama, Kanagawa 221-8686
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7
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Chen D, Kang Z, Bessho T. Molecular grafting to improve adhesion of spray-deposited circuits on polymeric surface for flexible electronics. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2017.03.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Hammer BAG, Müllen K. Dimensional Evolution of Polyphenylenes: Expanding in All Directions. Chem Rev 2015; 116:2103-40. [DOI: 10.1021/acs.chemrev.5b00515] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Brenton A. G. Hammer
- Max Planck Institute for Polymer Research, Ackermannweg
10, 55128, Mainz, Germany
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, Ackermannweg
10, 55128, Mainz, Germany
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9
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Ganiyu SO, van Hullebusch ED, Cretin M, Esposito G, Oturan MA. Coupling of membrane filtration and advanced oxidation processes for removal of pharmaceutical residues: A critical review. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.09.059] [Citation(s) in RCA: 360] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Yan Y, Huang LB, Zhou Y, Han ST, Zhou L, Sun Q, Zhuang J, Peng H, Yan H, Roy VAL. Surface Decoration on Polymeric Gate Dielectrics for Flexible Organic Field-Effect Transistors via Hydroxylation and Subsequent Monolayer Self-Assembly. ACS APPLIED MATERIALS & INTERFACES 2015; 7:23464-23471. [PMID: 26439239 DOI: 10.1021/acsami.5b05363] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A simple photochemical reaction based on confined photocatalytic oxidation (CPO) treatment and hydrolysis was employed to efficiently convert C-H bonds into C-OH groups on polymeric material surfaces, followed by investigation of monolayer self-assembly decoration on polymeric dielectrics via chemical bonding for the organic field-effect transistors (OFETs) applications. This method is a low temperature process and has negligible etching effect on polymeric dielectric layers. Various types of self-assembled monolayers have been tested and successfully attached onto the hydroxylated polymeric dielectric surfaces through chemical bonding, ensuring the stability of decorated functional films during the subsequent device fabrication consisting of solution processing of the polymer active layer. With the surface decoration of functional groups, both n-type and p-type polymers exhibit enhanced carrier mobilities in the unipolar OFETs. In addition, enhanced and balanced mobilities are obtained in the ambipolar OFETs with the blend of polymer semiconductors. The anchored self-assembled monolayers on the dielectric surfaces dramatically preclude the solvent effect, thus enabling an improvement of carrier mobility up to 2 orders of magnitude. Our study opens a way of targeted modifications of polymeric surfaces and related applications in organic electronics.
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Affiliation(s)
- Yan Yan
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Long-Biao Huang
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Ye Zhou
- Institute for Advanced Study, Shenzhen University , Shenzhen, Guangdong 508060, People's Republic of China
| | - Su-Ting Han
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Li Zhou
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Qijun Sun
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Jiaqing Zhuang
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Haiyan Peng
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
- Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences , Guangzhou 511458, People's Republic of China
| | - He Yan
- Department of Chemistry, Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong
| | - V A L Roy
- Department of Physics and Materials Science, City University of Hong Kong , Tat Chee Avenue, Kowloon, Hong Kong SAR
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11
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Hammer BAG, Moritz R, Stangenberg R, Baumgarten M, Müllen K. The polar side of polyphenylene dendrimers. Chem Soc Rev 2015; 44:4072-90. [DOI: 10.1039/c4cs00245h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The site-specific functionalization of poly(phenylene) dendrimers can produce macromolecules with a range of different polarities.
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Affiliation(s)
| | - Ralf Moritz
- Max-Planck-Institut für Polymerforschung
- 55128 Mainz
- Germany
| | | | | | - Klaus Müllen
- Max-Planck-Institut für Polymerforschung
- 55128 Mainz
- Germany
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12
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Barik S, Valiyaveettil S. Synthesis and self-assembly of polyhydroxylated and electropolymerizable block copolymers. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Satyananda Barik
- Department of Chemistry; 3 Science Drive 3, National University of Singapore; 10 Kent Ridge Crescent Singapore 117543
| | - Suresh Valiyaveettil
- Department of Chemistry; 3 Science Drive 3, National University of Singapore; 10 Kent Ridge Crescent Singapore 117543
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13
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Mu X, Guo S, Zhang L, Yang P. Modification of indium tin oxide with persulfate-based photochemistry toward facile, rapid, and low-temperature interface-mediated multicomponent assembling. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4945-4951. [PMID: 24716839 DOI: 10.1021/la5004963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The well-controlled material assembly and patterning on indium tin oxide (ITO) coating layer is of great importance for the practical fabrication of a functional device. Nonetheless, the conventional way to achieve this aim is still mainly based on the combination of photolithography with pattern transfer techniques (e.g., wet/dry etching, μCP) due to the lack of one method that is able to directly afford site-selective ITO surface tailoring and subsequent templating for material assembly. Herein, we reported a novel, fast, and efficient photochemical reaction to accurately tailor the surface property of ITO with light-controlled site-selectivity, thus resulting in direct photoresist-free and etching/contact-free lithographic patterning of building blocks, e.g., ZnO, BaTiO3, CdS, lipid membrane, conductive polymers, colloids, and liquid crystals. The entire process reveals new interfacial chemistry suitable for inorganic metal oxide and its important versatile implications for low-cost fabrication of large-area flat and flexible optical/electronic/biorelated devices.
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Affiliation(s)
- Xiaoyan Mu
- Key Laboratory of Applied Surface and Colloids Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xìan, 710119 China
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14
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Yang P, Yang W. Hydroxylation of organic polymer surface: method and application. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3759-70. [PMID: 24564629 DOI: 10.1021/am405857m] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
It may be hardly believable that inert C-H bonds on a polymeric material surface could be quickly and efficiently transformed into C-OH by a simple and mild way. Thanks to the approaches developed recently, it is now possible to transform surface H atoms of a polymeric substrate into monolayer OH groups by a simple/mild photochemical reaction. Herein the method and application of this small-molecular interfacial chemistry is highlighted. The existence of hydroxyl groups on material surfaces not only determines the physical and chemical properties of materials but also provides effective reaction sites for postsynthetic sequential modification to fulfill the requirements of various applications. However, organic synthetic materials based on petroleum, especially polyolefins comprise mainly C and H atoms and thus present serious surface problems due to low surface energy and inertness in reactivity. These limitations make it challenging to perform postsynthetic surface sequential chemical derivatization toward enhanced functionalities and properties and also cause serious interfacial problems when bonding or integrating polymer substrates with natural or inorganic materials. Polymer surface hydroxylation based on direct conversion of C-H bonds on polymer surfaces is thus of significant importance for academic and practical industrial applications. Although highly active research results have reported on small-molecular C-H bond activation in solution (thus homogeneous), most of them, featuring the use of a variety of transition metals as catalysts, present a slow reaction rate, a low atom economy and an obvious environmental pollution. In sharp contrast to these conventional C-H activation strategies, the present Spotlight describes a universal confined photocatalytic oxidation (CPO) system that is able to directly convert polymer surface C-H bonds to C-OSO3(-) and, subsequently, to C-OH through a simple hydrolysis. Generally speaking, these newly implanted hydroxyl groups preserve their own reactivity toward other complementary compounds, thus creating a novel base with distinct surface properties. Thanks to this functionalized platform, a wide range of organic, inorganic and metal materials have been attached to conventional organic polymer substrates through the rational engineering of surface molecular templates from small functional groups to macromolecules. It is expected that the proposed novel CPO method and its versatile usages in advanced material applications will offer new opportunities for a variety of scientific communities, especially for those working on surface/interface modulation.
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Affiliation(s)
- Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an 710062, China
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15
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Yang P, Yang W. Surface Chemoselective Phototransformation of C–H Bonds on Organic Polymeric Materials and Related High-Tech Applications. Chem Rev 2013; 113:5547-94. [PMID: 23614481 DOI: 10.1021/cr300246p] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Peng Yang
- Key Laboratory
of Applied Surface
and Colloid Chemistry, Ministry of Education, College of Chemistry
and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Wantai Yang
- The State Key Laboratory of
Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing
100029, China
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16
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Photoelectrochemical Sensor Based on Molecularly Imprinted Polymer-Coated TiO2 Nanotubes for Lindane Specific Recognition and Detection. J Inorg Organomet Polym Mater 2013. [DOI: 10.1007/s10904-013-9836-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Correlation of SiO x layer thickness and properties of BOPP/SiO x composite films with spin coating process parameters. CHINESE JOURNAL OF POLYMER SCIENCE 2013. [DOI: 10.1007/s10118-013-1224-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Gong YH, Yang J, Cao FY, Zhang J, Cheng H, Zhuo RX, Zhang XZ. Photoresponsive smart template for reversible cell micropatterning. J Mater Chem B 2013; 1:2013-2017. [DOI: 10.1039/c3tb20073f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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19
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Wang P, Dai W, Ge L, Yan M, Ge S, Yu J. Visible light photoelectrochemical sensor based on Au nanoparticles and molecularly imprinted poly(o-phenylenediamine)-modified TiO2nanotubes for specific and sensitive detection chlorpyrifos. Analyst 2013; 138:939-45. [DOI: 10.1039/c2an36266j] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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20
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Cross AJ, Dunnill CW, Parkin IP. Production of Predominantly Anatase Thin Films on Various Grades of Steel and Other Metallic Substrates From TiCl4 and Ethyl Acetate by Atmospheric Pressure CVD. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/cvde.201106964] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Yen YC, Cheng CC, Wang YS, Chu YL, Lu CH, Yang W, Chang FC. Surface modification of poly(2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH-PPV) by confined photo-catalytic oxidation. J Colloid Interface Sci 2012; 368:663-6. [DOI: 10.1016/j.jcis.2011.11.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 11/15/2011] [Accepted: 11/17/2011] [Indexed: 11/27/2022]
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22
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Preparation and characterization of copper patterns on polyethylenimine-modified flexible substrates. REACT FUNCT POLYM 2011. [DOI: 10.1016/j.reactfunctpolym.2011.06.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Zhang J, Ding Q, Wang R, Gong J, Yang C. Liquid phase deposition of mesoporous TiO2/DNA hybrid film: Characterization and photoelectrochemical investigation. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.01.116] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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24
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Chen D, Zhang H, Li X, Li J. Biofunctional Titania Nanotubes for Visible-Light-Activated Photoelectrochemical Biosensing. Anal Chem 2010; 82:2253-61. [DOI: 10.1021/ac9021055] [Citation(s) in RCA: 198] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Da Chen
- College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China, and Department of Chemistry, Key Lab of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing 100084, China
| | - Hao Zhang
- College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China, and Department of Chemistry, Key Lab of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing 100084, China
| | - Xiang Li
- College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China, and Department of Chemistry, Key Lab of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing 100084, China
| | - Jinghong Li
- College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China, and Department of Chemistry, Key Lab of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing 100084, China
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25
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Gan S, Yang P, Yang W. Interface-directed sol-gel: direct fabrication of the covalently attached ultraflat inorganic oxide pattern on functionalized plastics. Sci China Chem 2010. [DOI: 10.1007/s11426-010-0022-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Lv S, Liu L, Yang W. Preparation of soft hydrogel nanoparticles with PNIPAm hair and characterization of their temperature-induced aggregation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:2076-2082. [PMID: 19795850 DOI: 10.1021/la9025766] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
There exists a great number of publications concerning the synthesis of core-shell and/or hairy particles by means of controlled/living polymerization. Nevertheless, how to fabricate ultrafine nanosized hairy particles, especially polymeric soft hairy particles, remains a significant challenge. This paper presents a simple self-developed approach consisting of a two-step photoinduced polymerization of cross-linked polyacrylamide (CLPAM) soft hydrogel nanoparticles (5-10 nm in diameter) grafted with poly(N-isopropylacrylamide) (PNIPAm) chains. The architecture of such ultrafine soft water-swollen CLPAM@PNIPAm core/shell nanoparticles (20-35 nm in diameter) demonstrated very specific temperature sensitive behaviors. During heating a fast association process was observed at approximately 33-34 degrees C and the singular hairy particles with 34 nm diameters clustered into aggregates that were approximately 120 nm in diameter. Raising the temperature further, however, led to a decrease in size to about 100 nm at 45 degrees C. This behavior was attributed to the formation of hydrophobic shell layers accompanying the shrinkage of PNIPAm chains with chain polar transformations. With the contraction pressure produced by further shrinkage of the hydrophobic shell layers, the soft fully swollen PAM cores expelled water and diminished in size. During the cooling process, these contracted cores that were trapped in the aggregates gave rise to an early dissociation. The hydrophilic hairy CLPAM@PNIPAm particles are believed to be potentially useful as carriers to specific target regions, e.g., cells for controlled drug delivery and other smart biomaterial applications.
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Affiliation(s)
- Shengjie Lv
- State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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Li T, Xu Y, Feng YQ. Open Tubular Capillary Electrochromatographic Separation of Proteins and Peptides Using a TiO2 Nanoparticle-Deposited Capillary by Liquid Phase Deposition. J LIQ CHROMATOGR R T 2009. [DOI: 10.1080/10826070903248411] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Ting Li
- a Department of Chemistry , Wuhan University , Wuhan, P. R. China
| | - Ying Xu
- a Department of Chemistry , Wuhan University , Wuhan, P. R. China
| | - Yu-Qi Feng
- a Department of Chemistry , Wuhan University , Wuhan, P. R. China
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28
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Liu L, Ren M, Yang W. Preparation of polymeric Janus particles by directional UV-induced reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:11048-11053. [PMID: 19522475 DOI: 10.1021/la901364a] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Polymeric Janus particles are obtained by UV-induced selective surface grafting polymerizations and coupling reactions, in virtue of the light-absorption of photoreactive materials such as the immobilized photoinitiator and spread photoinitiator solution on the surfaces exposed to UV light and the sheltering of densely arrayed immovable particles from light. Varying the monomers or macromolecules applied in photografting polymerization or coupling reaction, and choosing diverse polymeric particles of various size, bicolor and amphiphilic Janus particles could be successfully achieved. Observations by fluorescence microscope, scanning electron microscope ,and transmission electron microscope confirmed the asymmetrical morphology of the resultant Janus particles.
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Affiliation(s)
- Lianying Liu
- State Key Laboratory of Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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29
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Gan S, Yang P, Yang W. Photoactivation of alkyl C-H and silanization: a simple and general route to prepare high-density primary amines on inert polymer surfaces for protein immobilization. Biomacromolecules 2009; 10:1238-43. [PMID: 19317482 DOI: 10.1021/bm900011h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Surface modification through implanting functional groups has been demonstrated to be extremely important to biomedical applications. The usage of organic polymer phase is often required to achieve satisfactory results. However, organic surfaces usually have poor chemical reactivity toward other reactants and target biomolecules because these surfaces usually only consist of simple alkyl (C-H) and/or alkyl ether (ROR') structures. For the first time, we here report the potential to perform silanization techniques on alkyl polymer surface, which provide a simple, fast, inexpensive, and general method to decorate versatile functional groups at the molecular level. As an example, high-density primary amines could be obtained on a model polymer, polypropylene substrate, through the reaction between amine-capped silane, 3-aminopropyltriethoxysilane (APTES) and hydroxylated polypropylene surface. A model protein, immunoglobulin (IgG), could be effectively immobilized on the surface after transforming amines to aldehydes by the aldehyde-amine condensation reaction between glutaraldehyde (GA) and amines. The routes we report here could directly make use of the benefits from well-developed silane chemistry, and hereby are capable of grafting any functionalities on inert alkyl surfaces via changing the terminal groups in silanes, which should instantly stimulate the development of many realms such as microarrays, immunoassays, biosensors, filtrations, and microseparation.
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Affiliation(s)
- Shenghua Gan
- The State Key Laboratory of Chemical Resource Engineering, Beijing, 100029, China
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30
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Zou S, Bai H, Yang P, Yang W. A Biomimetic Chemical Approach to Facile Preparation of Large-Area, Patterned, ZnO Quantum Dot/Polymer Nanocomposites on Flexible Plastics. MACROMOL CHEM PHYS 2009. [DOI: 10.1002/macp.200900100] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Liu P, Cai W, Fang M, Li Z, Zeng H, Hu J, Luo X, Jing W. Room temperature synthesized rutile TiO(2) nanoparticles induced by laser ablation in liquid and their photocatalytic activity. NANOTECHNOLOGY 2009; 20:285707. [PMID: 19550020 DOI: 10.1088/0957-4484/20/28/285707] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
TiO(2) nanoparticles were prepared by one-step pulsed laser ablation of a titanium target immersed in a poly-(vinylpyrrolidone) solution at room temperature. The products were systematically characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM), Raman spectroscopy and x-ray photoelectron spectroscopy (XPS). The results indicated that the rutile TiO(2) nanocrystalline particles were one-step synthesized at room temperature and the mean size in diameter is about 50 nm with a narrow size distribution. A probable formation process was proposed on the basis of the microstructure and the instantaneous plasma plume induced by the laser. Photocatalytic activity was monitored by degradation of a methylene blue solution. The as-prepared rutile TiO(2) nanoparticles demonstrate a good photocatalytic performance. This work shows that pulsed laser ablation in liquid media is a good method to synthesize some nanosized materials which are difficult to produce by other conventional methods.
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Affiliation(s)
- Peisheng Liu
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, PR China.
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32
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Integration of separation and photocatalysis using an inorganic membrane modified with Si-doped TiO2 for water purification. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2009.02.040] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Room-temperature fabrication of anatase TiO2 submicrospheres with nanothornlike shell for photocatalytic degradation of methylene blue. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.03.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Nishizawa K, Nagano S, Seki T. Micropatterning of titanium oxide film via phototactic mass transport. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b916494d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Preparation of transparent polystyrene nano-latexes by an UV-induced routine emulsion polymerization. POLYMER 2009. [DOI: 10.1016/j.polymer.2008.10.058] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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36
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Cha MA, Shin C, Kannaiyan D, Jang YH, Kochuveedu ST, Ryu DY, Kim DH. A versatile approach to the fabrication of TiO2 nanostructures with reverse morphology and mesoporous Ag/TiO2 thin films via cooperative PS-b-PEO self-assembly and a sol-gel process. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b907922j] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Gratton SEA, Williams SS, Napier ME, Pohlhaus PD, Zhou Z, Wiles KB, Maynor BW, Shen C, Olafsen T, Samulski ET, DeSimone JM. The pursuit of a scalable nanofabrication platform for use in material and life science applications. Acc Chem Res 2008; 41:1685-95. [PMID: 18720952 DOI: 10.1021/ar8000348] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this Account, we describe the use of perfluoropolyether (PFPE)-based materials that are able to accurately mold and replicate micro- and nanosized features using traditional techniques such as embossing as well as new techniques that we developed to exploit the exceptional surface characteristics of fluorinated substrates. Because of the unique partial wetting and nonwetting characteristics of PFPEs, we were able to go beyond the usual molding and imprint lithography approaches and have created a technique called PRINT (Particle [or Pattern] Replication In Nonwetting Templates). PRINT is a distinctive "top-down" fabrication technique capable of generating isolated particles, arrays of particles, and arrays of patterned features for a plethora of applications in both nanomedicine and materials science. A particular strength of the PRINT technology is the high-resolution molding of well-defined particles with precise control over size, shape, deformability, and surface chemistry. The level of replication obtained showcases some of the unique characteristics of PFPE molding materials. In particular, these materials arise from very low surface energy precursors with positive spreading coefficients, can be photocured at ambient temperature, and are minimally adhesive, nonswelling, and conformable. These distinctive features enable the molding of materials with unique attributes and nanometer resolution that have unprecedented scientific and technological value. For example, in nanomedicine, the use of PFPE materials with the PRINT technique allows us to design particles in which we can tailor key therapeutic parameters such as bioavailability, biodistribution, target-specific cell penetration, and controlled cargo release. Similarly, in materials science, we can fabricate optical films and lens arrays, replicate complex, naturally occurring objects such as adenovirus particles, and create 2D patterned arrays of inorganic oxides.
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Affiliation(s)
| | | | | | - Patrick D. Pohlhaus
- Liquidia Technologies, P.O. Box 110085, Research Triangle Park, North Carolina 27709
| | - Zhilian Zhou
- Liquidia Technologies, P.O. Box 110085, Research Triangle Park, North Carolina 27709
| | | | - Benjamin W. Maynor
- Liquidia Technologies, P.O. Box 110085, Research Triangle Park, North Carolina 27709
| | - Clifton Shen
- Department of Molecular and Medical Pharmacology, University of California at Los Angeles, Los Angeles, California 90095
| | - Tove Olafsen
- Department of Molecular and Medical Pharmacology, University of California at Los Angeles, Los Angeles, California 90095
| | | | - Joseph M. DeSimone
- Liquidia Technologies, P.O. Box 110085, Research Triangle Park, North Carolina 27709
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695
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38
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Yin M, Cheng Y, Liu M, Gutmann J, Müllen K. Nanostructured TiO2Films Templated by Amphiphilic Dendritic Core-Double-Shell Macromolecules: From Isolated Nanorings to Continuous 2D Mesoporous Networks. Angew Chem Int Ed Engl 2008; 47:8400-3. [DOI: 10.1002/anie.200803071] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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39
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Yin M, Cheng Y, Liu M, Gutmann J, Müllen K. Nanostructured TiO2Films Templated by Amphiphilic Dendritic Core-Double-Shell Macromolecules: From Isolated Nanorings to Continuous 2D Mesoporous Networks. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200803071] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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40
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Li Y, Sasaki T, Shimizu Y, Koshizaki N. Hexagonal-Close-Packed, Hierarchical Amorphous TiO2 Nanocolumn Arrays: Transferability, Enhanced Photocatalytic Activity, and Superamphiphilicity without UV Irradiation. J Am Chem Soc 2008; 130:14755-62. [PMID: 18844352 DOI: 10.1021/ja805077q] [Citation(s) in RCA: 310] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yue Li
- Nanotechnology Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Takeshi Sasaki
- Nanotechnology Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Yoshiki Shimizu
- Nanotechnology Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Naoto Koshizaki
- Nanotechnology Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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41
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Stroyuk AL, Shvalagin VV, Raevskaya AE, Kryukov AI, Kuchmii SY. Photochemical formation of semiconducting nanostructures. THEOR EXP CHEM+ 2008. [DOI: 10.1007/s11237-008-9037-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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42
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Yang P, Zou S, Yang W. Positive and negative ZnO micropatterning on functionalized polymer surfaces. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2008; 4:1527-36. [PMID: 18711752 DOI: 10.1002/smll.200700859] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Patterned ZnO deposition on substrates has received increasing attention because of its great potential in photocatalysis, energy conversion, and electro-optical techniques. Chemical solution growth is especially promising for organic substrates due to its very mild reaction conditions. Here this method is used on functionality-patterned polymer surfaces in order to fabricate positive and negative ZnO micropatterns. A ZnO film made of arrayed rods, typically 500-750 nm in diameter and 2.5 microm in length, is selectively obtained on sulfated and hydroxylated regions of biaxially oriented poly(propylene), giving rise to positive patterns. For reactive polyesters such as poly(ethylene terephthalate), the ZnO rods selectively remain on the unmodified original regions, creating negative patterns. Unlike complex photolithography procedures, the irradiation and patterning processes do not require the use of positive or negative photoresists, and possible damage from acidic solutions on the underlying substrate during the chemical etching process is avoided. The process thus proves to be a simple, creditable, and low-cost method, which could be easily applied on a variety of inert and reactive polymer surfaces.
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Affiliation(s)
- Peng Yang
- The State Key Laboratory of Chemical Resource Engineering Beijing, PR China
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43
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Hampton MJ, Williams SS, Zhou Z, Nunes J, Ko DH, Templeton JL, Samulski ET, DeSimone JM. The Patterning of Sub-500 nm Inorganic Oxide Structures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2008; 20:2667-2673. [PMID: 25213887 DOI: 10.1002/adma.200702495] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Indexed: 06/03/2023]
Abstract
Elastomeric perfluoropolyether molds are applied to pattern arrays of sub-500 nm inorganic oxide features. This versatile soft-lithography technique can be used to pattern a wide range of materials; in this work inorganic oxides including TiO2 , SnO2 , ZnO, ITO, and BaTiO3 are patterned on a variety of substrates with different aspect ratios. An example of TiO2 posts is shown in the figure.
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Affiliation(s)
- Meredith J Hampton
- Department of Chemistry University of North Carolina at Chapel Hill CB #3290, Caudill Labs, Chapel Hill, NC 27599 (USA)
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44
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You B, Wen N, Zhou S, Wu L, Zhao D. Facile Method for Fabrication of Nanocomposite Films with an Ordered Porous Surface. J Phys Chem B 2008; 112:7706-12. [DOI: 10.1021/jp802812e] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bo You
- Department of Materials Science and the Advanced Coating Research Center of China Educational Ministry, and Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Nangen Wen
- Department of Materials Science and the Advanced Coating Research Center of China Educational Ministry, and Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Shuxue Zhou
- Department of Materials Science and the Advanced Coating Research Center of China Educational Ministry, and Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Limin Wu
- Department of Materials Science and the Advanced Coating Research Center of China Educational Ministry, and Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
| | - Dongyuan Zhao
- Department of Materials Science and the Advanced Coating Research Center of China Educational Ministry, and Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
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45
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Kobayashi A, Miyake H, Hattori H, Kuwana R, Hiruma Y, Nakahama KI, Ichinose S, Ota M, Nakamura M, Takeda S, Morita I. In vitro formation of capillary networks using optical lithographic techniques. Biochem Biophys Res Commun 2007; 358:692-7. [PMID: 17509527 DOI: 10.1016/j.bbrc.2007.04.206] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2007] [Accepted: 04/17/2007] [Indexed: 10/23/2022]
Abstract
Tissue engineering approaches have been developed for vascular grafts, but success has been limited to arterial replacements of large-caliber vessels. We have developed an innovative technique to transplant engineered capillary networks by printing techniques. Endothelial cells were cultured on a patterned substrate, in which network patterns were generated by prior optical lithography. Subsequently, the patterned cells were transferred to extracellular matrix and tissue at which point they changed their morphologies and formed tubular structures. Microinjection of dye showed that the micrometer-scale tubular structure had in vitro flow potential. When capillary-like networks engineered on amnion membranes were transplanted into mice, we found blood cells inside of the lumen of the transplanted capillary-like structure. This is the first report of the in vitro formation of capillary networks using cell transfer technique, and this novel technique may open the way for development of rapid and effective blood perfusion systems in regenerative medicine.
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Affiliation(s)
- Akiko Kobayashi
- Department of Cellular Physiological Chemistry, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
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