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Cao H, Escamilla M, Anas M, Tan Z, Gulati S, Yun J, Arole KD, Lutkenhaus JL, Radovic M, Pentzer EB, Green MJ. Synthesis and Electronic Applications of Particle-Templated Ti 3C 2T z MXene-Polymer Films via Pickering Emulsion Polymerization. ACS APPLIED MATERIALS & INTERFACES 2021; 13:51556-51566. [PMID: 34672540 DOI: 10.1021/acsami.1c16234] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
MXene/polymer composites have gained widespread attention due to their high electrical conductivity and extensive applications, including electromagnetic interference (EMI) shielding, energy storage, and catalysis. However, due to the difficulty of dispersing MXenes in common polymers, the fabrication of MXene/polymer composites with high electrical conductivity and satisfactory EMI shielding properties is challenging, especially at low MXene loadings. Here, we report the fabrication of MXene-armored polymer particles using dispersion polymerization in Pickering emulsions and demonstrate that these composite powders can be used as feedstocks for MXene/polymer composite films with excellent EMI shielding performance. Ti3C2Tz nanosheets are used as the representative MXene, and three different monomers are used to prepare the armored particles. The presence of nanosheets on the particle surface was confirmed by X-ray photoelectron spectroscopy and scanning electron microscopy. Hot pressing the armored particles above Tg of the polymer produced Ti3C2Tz/polymer composite films; the films are electrically conductive because of the network of nanosheets templated by the particle feedstocks. For example, the particle-templated Ti3C2Tz/polystyrene film had an electrical conductivity of 0.011 S/cm with 1.2 wt % of Ti3C2Tz, which resulted in a high radio frequency heating rate of 13-15 °C/s in the range of 135-150 MHz and an EMI shielding effectiveness of ∼21 dB within the X band. This work provides a new approach to fabricate MXene/polymer composite films with a templated electrical network at low MXene loadings.
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Affiliation(s)
- Huaixuan Cao
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Maria Escamilla
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Muhammad Anas
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Zeyi Tan
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Siddhant Gulati
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Junyeong Yun
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Kailash Dhondiram Arole
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Jodie L Lutkenhaus
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Miladin Radovic
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Emily B Pentzer
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Micah J Green
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
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Chojnacka-Górka K, Wolski K, Zapotoczny S. Durable Polyelectrolyte Microcapsules with Near-Infrared-Triggered Loading and Nondestructive Release of Cargo. ACS APPLIED MATERIALS & INTERFACES 2021; 13:1562-1572. [PMID: 33369391 DOI: 10.1021/acsami.0c19353] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Microcapsules formed using a "layer-by-layer" alternating deposition of oppositely charged polyelectrolytes on sacrificial templates have reached high interest because of their facile fabrication procedure using a broad range of materials and tailored properties. However, their practical applications as microcarriers are limited as the capsules commonly suffer from low mechanical stability that can be enhanced by chemical or physical crosslinking but at the expense of decreasing permeability of the capsules' walls. It is demonstrated here that the incorporation of multiwalled carbon nanotubes in a relatively small amount (3.5%) arranged in the direction perpendicular to the capsules' walls led to an almost 20-fold increase of the apparent elastic modulus of the microcapsules as shown using the osmotic pressure method. Importantly, the introduced carbon nanotubes due to their absorption in the near-infrared region and specific arrangement enabled also a light-triggered increase of permeability of the capsules in a reversible, nondestructive manner as shown using fluorescently labeled dextrans of various molar masses. Such results imply durability and facile loading/unloading of the microcapsules that are both crucial for their practical applications as microcontainers and microreactors.
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Affiliation(s)
| | - Karol Wolski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Szczepan Zapotoczny
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
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Zhang J, Zheng T, Alarçin E, Byambaa B, Guan X, Ding J, Zhang YS, Li Z. Porous Electrospun Fibers with Self-Sealing Functionality: An Enabling Strategy for Trapping Biomacromolecules. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:10.1002/smll.201701949. [PMID: 29094479 PMCID: PMC5845855 DOI: 10.1002/smll.201701949] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 08/25/2017] [Indexed: 05/30/2023]
Abstract
Stimuli-responsive porous polymer materials have promising biomedical application due to their ability to trap and release biomacromolecules. In this work, a class of highly porous electrospun fibers is designed using polylactide as the polymer matrix and poly(ethylene oxide) as a porogen. Carbon nanotubes (CNTs) with different concentrations are further impregnated onto the fibers to achieve self-sealing functionality induced by photothermal conversion upon light irradiation. The fibers with 0.4 mg mL-1 of CNTs exhibit the optimum encapsulation efficiency of model biomacromolecules such as dextran, bovine serum albumin, and nucleic acids, although their photothermal conversion ability is slightly lower than the fibers with 0.8 mg mL-1 of CNTs. Interestingly, reversible reopening of the surface pores is accomplished with the degradation of PLA, affording a further possibility for sustained release of biomacromolecules after encapsulation. Effects of CNT loading on fiber morphology, structure, thermal/mechanical properties, degradation, and cell viability are also investigated. This novel class of porous electrospun fibers with self-sealing capability has great potential to serve as an enabling strategy for trapping/release of biomacromolecules with promising applications in, for example, preventing inflammatory diseases by scavenging cytokines from interstitial body fluids.
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Affiliation(s)
- Jin Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Ting Zheng
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Emine Alarçin
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Batzaya Byambaa
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Xiaofei Guan
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Jianxun Ding
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Zhongming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
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4
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González-Domínguez E, Iturrioz-Rodríguez N, Padín-González E, Villegas J, García-Hevia L, Pérez-Lorenzo M, Parak WJ, Correa-Duarte MA, Fanarraga ML. Carbon nanotubes gathered onto silica particles lose their biomimetic properties with the cytoskeleton becoming biocompatible. Int J Nanomedicine 2017; 12:6317-6328. [PMID: 28919736 PMCID: PMC5587187 DOI: 10.2147/ijn.s141794] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Carbon nanotubes (CNTs) are likely to transform the therapeutic and diagnostic fields in biomedicine during the coming years. However, the fragmented vision of their side effects and toxicity in humans has proscribed their use as nanomedicines. Most studies agree that biocompatibility depends on the state of aggregation/dispersion of CNTs under physiological conditions, but conclusions are confusing so far. This study designs an experimental setup to investigate the cytotoxic effect of individualized multiwalled CNTs compared to that of identical nanotubes assembled on submicrometric structures. Our results demonstrate how CNT cytotoxicity is directly dependent on the nanotube dispersion at a given dosage. When CNTs are gathered onto silica templates, they do not interfere with cell proliferation or survival becoming highly compatible. These results support the hypothesis that CNT cytotoxicity is due to the biomimetics of these nanomaterials with the intracellular nanofilaments. These findings provide major clues for the development of innocuous CNT-containing nanodevices and nanomedicines.
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Affiliation(s)
- Elena González-Domínguez
- Department of Physical Chemistry, Biomedical Research Center (CINBIO), Southern Galicia Institute of Health Research (IISSG), Biomedical Research Networking Center for Mental Health (CIBERSAM), Universidade de Vigo, Vigo, Spain
| | | | | | - Juan Villegas
- Nanomedicine Group, Universidad de Cantabria-IDIVAL, Santander, Spain
| | | | - Moisés Pérez-Lorenzo
- Department of Physical Chemistry, Biomedical Research Center (CINBIO), Southern Galicia Institute of Health Research (IISSG), Biomedical Research Networking Center for Mental Health (CIBERSAM), Universidade de Vigo, Vigo, Spain
| | - Wolfgang J Parak
- Department of Physics, Philipps Universität Marburg, Marburg, Germany
| | - Miguel A Correa-Duarte
- Department of Physical Chemistry, Biomedical Research Center (CINBIO), Southern Galicia Institute of Health Research (IISSG), Biomedical Research Networking Center for Mental Health (CIBERSAM), Universidade de Vigo, Vigo, Spain
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Crosslinking of floating colloidal monolayers. MONATSHEFTE FUR CHEMIE 2017; 148:1539-1546. [PMID: 28751794 PMCID: PMC5504139 DOI: 10.1007/s00706-017-1997-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 05/09/2017] [Indexed: 11/06/2022]
Abstract
Abstract Crosslinked colloidal monolayers are promising as templates, lithographic masks, filtration membranes, or membranes for controlled release rates in drug delivery. We demonstrate assembly of monodisperse micron-sized polystyrene (PS) beads at an air/water interface, which are transformed into crystalline monolayers using addition of surface-active agents. Vapor annealing methods with solvents (toluene and xylene) and crosslinking agents (divinylbenzene) were investigated regarding their ability to crosslink these floating monolayers directly at the interface, generating crosslinked membranes with crystal size up to 44 cm2, domain size up to 1.9 mm2, and nano-sized pores (100–300 nm). The demonstrated fabrication method emphasizes short fabrication time using a simple setup. Graphical abstract ![]()
Electronic supplementary material The online version of this article (doi:10.1007/s00706-017-1997-6) contains supplementary material, which is available to authorized users.
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6
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Wu F, Li J, Su Y, Wang J, Yang W, Li N, Chen L, Chen S, Chen R, Bao L. Layer-by-Layer Assembled Architecture of Polyelectrolyte Multilayers and Graphene Sheets on Hollow Carbon Spheres/Sulfur Composite for High-Performance Lithium-Sulfur Batteries. NANO LETTERS 2016; 16:5488-5494. [PMID: 27479273 DOI: 10.1021/acs.nanolett.6b01981] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In the present work, polyelectrolyte multilayers (PEMs) and graphene sheets are applied to sequentially coat on the surface of hollow carbon spheres/sulfur composite by a flexible layer-by-layer (LBL) self-assembly strategy. Owing to the strong electrostatic interactions between the opposite charged materials, the coating agents are very stable and the coating procedure is highly efficient. The LBL film shows prominent impact on the stability of the cathode by acting as not only a basic physical barrier, and more importantly, an ion-permselective film to block the polysulfides anions by Coulombic repulsion. Furthermore, the graphene sheets can help to stabilize the polyelectrolytes film and greatly reduce the inner resistance of the electrode by changing the transport of the electrons from a "point-to-point" mode to a more effective "plane-to-point'' mode. On the basis of the synergistic effect of the PEMs and graphene sheets, the fabricated composite electrode exhibits very stable cycling stability for over 200 cycles at 1 A g(-1), along with a high average Coulombic efficiency of 99%. With the advantages of rapid and controllable fabrication of the LBL coating film, the multifunctional architecture developed in this study should inspire the design of other lithium-sulfur cathodes with unique physical and chemical properties.
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Affiliation(s)
- Feng Wu
- School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
- Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China
| | - Jian Li
- School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
| | - Yuefeng Su
- School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
- Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China
| | - Jing Wang
- School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
- Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China
| | - Wen Yang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology , Beijing 100081, China
| | - Ning Li
- School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
| | - Lai Chen
- School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
| | - Shi Chen
- School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
- Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China
| | - Renjie Chen
- School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
- Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China
| | - Liying Bao
- School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China
- Collaborative Innovation Center of Electric Vehicles in Beijing , Beijing 100081, China
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7
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Chojnacka-Górka K, Rozpędzik A, Zapotoczny S. Robust polyelectrolyte microcapsules reinforced with carbon nanotubes. RSC Adv 2016. [DOI: 10.1039/c6ra21220d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A facile method of incorporation of carbon nanotubes across the walls of polyelectrolyte microcapsules was developed for their reinforcement and sealing.
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Affiliation(s)
| | - Anna Rozpędzik
- Jagiellonian University
- Faculty of Chemistry
- 30-060 Krakow
- Poland
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8
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Li YX, Gao Y, Yang C, Wang ZQ, Xue G. Facile and controllable assembly of multiwalled carbon nanotubes on polystyrene microspheres. CHINESE JOURNAL OF POLYMER SCIENCE 2014. [DOI: 10.1007/s10118-014-1424-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Hu CY, Xu YJ, Duo SW, Li WK, Xiang JH, Li MS, Zhang RF. Preparation of Inorganic Hollow Spheres Based on Different Methods. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201000154] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Ünal H, Niazi JH. Carbon nanotube decorated magnetic microspheres as an affinity matrix for biomolecules. J Mater Chem B 2013; 1:1894-1902. [DOI: 10.1039/c3tb00563a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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11
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Yang C, Liu P. Chitosan/Functionalized Multiwalled Carbon Nanotubes Multilayer Hollow Microspheres Prepared via Layer-by-Layer Assembly Technique. Ind Eng Chem Res 2012. [DOI: 10.1021/ie301666z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chao Yang
- State Key Laboratory of Applied Organic Chemistry and
Institute of Polymer Science and Engineering, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Peng Liu
- State Key Laboratory of Applied Organic Chemistry and
Institute of Polymer Science and Engineering, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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12
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Incorporation of multiwalled carbon nanotubes on the surface of polystyrene microspheres via In Situ suspension polymerization. Macromol Res 2011. [DOI: 10.1007/s13233-011-0310-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Petrov PD, Georgiev GL. Ice-mediated coating of macroporous cryogels by carbon nanotubes: a concept towards electrically conducting nanocomposites. Chem Commun (Camb) 2011; 47:5768-70. [DOI: 10.1039/c1cc11045d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Feller JF, Lu J, Zhang K, Kumar B, Castro M, Gatt N, Choi HJ. Novel architecture of carbon nanotube decorated poly(methyl methacrylate) microbead vapour sensors assembled by spray layer by layer. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03779f] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Zhang C, Liu T, Lu X. Facile fabrication of polystyrene/carbon nanotube composite nanospheres with core-shell structure via self-assembly. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.06.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Song C, Kwon T, Han JH, Shandell M, Strano MS. Controllable synthesis of single-walled carbon nanotube framework membranes and capsules. NANO LETTERS 2009; 9:4279-4284. [PMID: 19842680 DOI: 10.1021/nl902518b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Controlling the morphology of membrane components at the nanometer scale is central to many next-generation technologies in water purification, gas separation, fuel cell, and nanofiltration applications. Toward this end, we report the covalent assembly of single-walled carbon nanotubes (SWNTs) into three-dimensional framework materials with intertube pores controllable by adjusting the size of organic linker molecules. The frameworks are fashioned into multilayer membranes possessing linker spacings from 1.7 to 3.0 nm, and the resulting framework films were characterized, including transport properties. Nanoindentation measurements by atomic force microscopy show that the spring constant of the SWNT framework film (22.6 +/- 1.2 N/m) increased by a factor of 2 from the control value (10.4 +/- 0.1 N/m). The flux ratio comparison in a membrane-permeation experiment showed that larger spacer sizes resulted in larger pore structures. This synthetic method was equally efficient on silica microspheres, which could then be etched to create all-SWNT framework, hollow capsules approximately 5 mum in diameter. These hollow capsules are permeable to organic and inorganic reagents, allowing one to form inorganic nanoparticles, for example, that become entrapped within the capsule. The ability to encapsulate functional nanomaterials inside perm-selective SWNT cages and membranes may find applications in new adsorbents, novel catalysts, and drug delivery vehicles.
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Affiliation(s)
- Changsik Song
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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17
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Hyun YJ, Lugstein A, Steinmair M, Bertagnolli E, Pongratz P. Orientation specific synthesis of kinked silicon nanowires grown by the vapour-liquid-solid mechanism. NANOTECHNOLOGY 2009; 20:125606. [PMID: 19420475 DOI: 10.1088/0957-4484/20/12/125606] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Kinked silicon nanowires (Si-NWs) were synthesized in a well reproducible manner using gold nanocluster-catalyzed quasi-one-dimensional growth on Si(111) substrates with silane (SiH(4)) as the precursor gas. The kinking is considered to be due to the change in the growth direction induced by the sudden change of the pressure during Si-NW synthesis. Structural high resolution transmission electron microscopy (HRTEM) characterization of the sample shows that epitaxial Si-NWs synthesized on Si(111) substrates at a total pressure of 3 mbar grow along the {111} direction, while the ones at 15 mbar favour the {112} direction. By dynamically changing the system pressure during the growth process morphological changes of the NW growth directions along their length have been shown, resulting in kinked nanowires. The crystallographic orientation relation of the kinking between the 3 and 15 mbar ranges has been analysed by TEM. It is shown that no defects or grain boundaries in the intersection between the two sections of the Si-NWs are necessary to form such kinks between different wire directions.
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Affiliation(s)
- Youn-Joo Hyun
- Institute for Solid State Electronics, Vienna University of Technology, Vienna, Austria
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18
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Sugikawa K, Numata M, Kaneko K, Sada K, Shinkai S. Alternate layer-by-layer adsorption of single- and double-walled carbon nanotubes wrapped by functionalized beta-1,3-glucan polysaccharides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:13270-13275. [PMID: 18973310 DOI: 10.1021/la802211q] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A great deal of attention has been focused on exploiting novel methods to fabricate thin carbonaceous capsules from multiple components for advanced materials. A layer-by-layer (LbL) method is therefore being introduced to synthesize thin and multi-carbon nanotube (CNT)-based hollow capsules from CNT complexes with cationic or anionic complementarily functionalized beta-1,3-glucans as building-blocks. These ionic beta-1,3-glucans wrap around single-walled carbon nanotubes (SWNTs) and double-walled carbon nanotubes (DWNTs) to form water-soluble complexes with ionic groups on their exterior surface. Alternate self-assembly of these CNT complexes on the silica particles is demonstrated in solution by electrostatic interactions. The LbL adsorption processes were carefully monitored by zeta-potential measurements, frequency shifts of a quartz crystal microbalance (QCM), and electron micrographs. Silica particles were then dissolved away by HF acid to obtain CNT-based hollow capsules composed of SWNTs and DWNTs. We believe that these novel surface adsorption methods are useful for potential design of CNT-based advanced functional materials.
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Affiliation(s)
- Kouta Sugikawa
- Graduate School of Engineering, Kyushu University, Japan
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19
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Haensch C, Ott C, Hoeppener S, Schubert US. Combination of different chemical surface reactions for the fabrication of chemically versatile building blocks onto silicon surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:10222-10227. [PMID: 18698865 DOI: 10.1021/la8016744] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The use of nucleophilic displacement reactions on bromine-terminated monolayers is presented to create new functional moieties onto silicon surfaces. Functional amines were used as suitable nucleophiles to introduce versatile building blocks onto self-assembled monolayers to perform further surface chemistry toward the fabrication of surfaces with designed properties by combining compatible chemical routes. These modified substrates were analyzed by suitable surface sensitive techniques. Furthermore, the functional monolayers were used for different postmodification reactions. For example, functional amines facilitated with acetylene groups were applied in the click chemistry approach. The use of amino-functionalized terpyridine units leads to the construction of supramolecular systems, where the choice of the metal monocomplex for the complexation is important for the tuning of the surface properties.
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Affiliation(s)
- Claudia Haensch
- Laboratory of Macromolecular Chemistry and Nanoscience, Center for Nanomaterials, Eindhoven University of Technology, Eindhoven, The Netherlands
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20
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Huang XJ, Li Y, Choi YK. A chestnut-like hierarchical architecture of a SWCNT/microsphere composite on an electrode for electroanalysis. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2008.01.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Sanles-Sobrido M, Salgueiriño-Maceira V, Correa-Duarte MA, Liz-Marzán LM. Magnificent sea-anemone-like magnetic silica capsules reinforced with carbon nanotubes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2008; 4:583-586. [PMID: 18446796 DOI: 10.1002/smll.200700916] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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22
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Shim BS, Podsiadlo P, Lilly DG, Agarwal A, Lee J, Tang Z, Ho S, Ingle P, Paterson D, Lu W, Kotov NA. Nanostructured thin films made by dewetting method of layer-by-layer assembly. NANO LETTERS 2007; 7:3266-73. [PMID: 17935371 DOI: 10.1021/nl071245d] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Layer-by-layer (LBL) assembly is one of the most ubiquitous coating techniques today. It also offers a pathway for multifunctional/multicomponent materials with molecular-scale control of stratified structures. However, technological applications of LBL are impeded by laborious and fluid-demanding nature of the process. While vertical organization of LBL films is natural for this technique, the control of lateral organization of the films is fairly difficult. Using the deposition of carbon nanotubes (SWNTs) and other nanoscale colloids, we introduce here a new approach to LBL based on dewetting phenomena, d-LBL. Its strengths include: (1) elimination of rinsing steps, (2) significant acceleration of the process, (3) improvement of lateral organization of LBL films, and (4) ability to produce nanostructured coatings from colloids when classical LBL fails. The generality of d-LBL can compete with traditional LBL and is demonstrated for cellulose nanowires, polyelectrolyte pairs, and semiconductor nanoparticles, metal oxides, and Au nanorods.
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Affiliation(s)
- Bong Sup Shim
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
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Han SJ, Kim B, Suh KD. Electrical Properties of a Composite Film of Poly(acrylonitrile) Nanoparticles Coated with Carbon Nanotubes. MACROMOL CHEM PHYS 2007. [DOI: 10.1002/macp.200600410] [Citation(s) in RCA: 16] [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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Li Y, Huang XJ, Heo SH, Li CC, Choi YK, Cai WP, Cho SO. Superhydrophobic bionic surfaces with hierarchical microsphere/SWCNT composite arrays. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:2169-74. [PMID: 17279709 DOI: 10.1021/la0620758] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Superhydrophobic bionic surfaces with hierarchical micro/nano structures were synthesized by decorating single-walled or multiwalled carbon nanotubes (CNTs) on monolayer polystyrene colloidal crystals using a wet chemical self-assembly technique and subsequent surface treatment with a low surface-energy material of fluoroalkylsilane. The bionic surfaces are based on the regularly ordered colloidal crystals, and thus the surfaces have a uniform superhydrophobic property on the whole surface. Moreover, the wettability of the bionic surface can be well controlled by changing the distribution density of CNTs or the size of polystyrene microspheres. The morphologies of the synthesized bionic surfaces bear much resemblance to natural lotus leaves, and the wettability exhibited remarkable superhydrophobicity with a water contact angle of about 165 degrees and a sliding angle of 5 degrees.
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Affiliation(s)
- Yue Li
- Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea
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