1451
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Ouhajji S, Landman J, Prévost S, Jiang L, Philipse AP, Petukhov AV. In situ observation of self-assembly of sugars and surfactants from nanometres to microns. SOFT MATTER 2017; 13:2421-2425. [PMID: 28318000 DOI: 10.1039/c7sm00109f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The hierarchical self-assembly of sugar and surfactant molecules into hollow tubular microstructures was characterized in situ with high resolution small-angle X-ray scattering spanning more than three orders of magnitude of spatial scales. Scattering profiles reveal that aqueous host-guest inclusion complexes self-assemble into multiple equally spaced curved bilayers forming a collection of concentric hollow cylinders. Scattering data can be described by a simple theoretical model of the microtubes. The interlamellar distance was found to be surprisingly large. Moreover, we report that the multi-walled structure of the microtubes swells as the concentration or the temperature is varied.
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Affiliation(s)
- Samia Ouhajji
- Van 't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.
| | - Jasper Landman
- Van 't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands. and European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Sylvain Prévost
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Lingxiang Jiang
- Department of Materials Science and Engineering, Jinan University, Guangzhou 510632, China
| | - Albert P Philipse
- Van 't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.
| | - Andrei V Petukhov
- Van 't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands. and Laboratory of Physical Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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1452
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Chen K, Ding J, Zhang S, Tang X, Yue Y, Guo L. A General Bioinspired, Metals-Based Synergic Cross-Linking Strategy toward Mechanically Enhanced Materials. ACS NANO 2017; 11:2835-2845. [PMID: 28240883 DOI: 10.1021/acsnano.6b07932] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Creating lightweight engineering materials combining high strength and great toughness remains a significant challenge. Despite possessing-enhanced strength and stiffness, bioinspired/polymeric materials usually suffer from clearly reduced extensibility and toughness when compared to corresponding bulk polymer materials. Herein, inspired by tiny amounts of various inorganic impurities for mechanical improvement in natural materials, we present a versatile and effective metal ion (Mn+)-based synergic cross-linking (MSC) strategy incorporating eight types of metal ions into material bulks that can drastically enhance the tensile strength (∼24.1-70.8%), toughness (∼18.6-110.1%), modulus (∼21.6-66.7%), and hardness (∼6.4-176.5%) of multiple types of pristine materials (from hydrophilic to hydrophobic and from unary to binary). More importantly, we also explore the primarily elastic-plastic deformation mechanism and brittle fracture behavior (indentation strain of >5%) of the synergic cross-linked graphene oxide (Syn-GO) paper by means of in situ nanoindentation SEM. The MSC strategy for mechanically enhanced integration can be readily attributed to the formation of the complicated metals-based cross-linking/complex networks in the interfaces and intermolecules between functional groups of materials and various metal ions that give rise to efficient energy dissipation. This work suggests a promising MSC strategy for designing advanced materials with outstanding mechanical properties by adding low amounts (<1.0 wt %) of synergic metal ions serving as synergic ion-bonding cross-linkers.
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Affiliation(s)
- Ke Chen
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, People's Republic of China
| | - Jin Ding
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, People's Republic of China
| | - Shuhao Zhang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, People's Republic of China
| | - Xuke Tang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, People's Republic of China
| | - Yonghai Yue
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, People's Republic of China
| | - Lin Guo
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University , Beijing 100191, People's Republic of China
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1453
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Hor JL, Jiang Y, Ring DJ, Riggleman RA, Turner KT, Lee D. Nanoporous Polymer-Infiltrated Nanoparticle Films with Uniform or Graded Porosity via Undersaturated Capillary Rise Infiltration. ACS NANO 2017; 11:3229-3236. [PMID: 28221754 DOI: 10.1021/acsnano.7b00298] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we present the fabrication of nanoporous polymer-infiltrated nanoparticle films (PINFs) with either uniform or graded porosity based on undersaturated capillary rise infiltration (UCaRI) and study the processing-structure-property relationship of these nanoporous PINFs. The UCaRI process involves first generating a bilayer film of a randomly packed nanoparticle layer atop a polymer layer, such that the volume of the polymer is less than the void volume in the nanoparticle packing. Subsequently, the bilayer film is annealed above the glass transition temperature of the polymer to induce polymer infiltration into the voids of the nanoparticle packing. Using in situ spectroscopic ellipsometry and molecular dynamics simulations, we observe that the polymer transport occurs in two stages: capillarity-induced infiltration, followed by gradual spreading, likely via surface diffusion. By varying the annealing time, UCaRI enables the generation of graded or uniform nanoporous PINFs. We also show that these nanoporous PINFs have tunable optical and mechanical properties, which can be tailored simply by changing the nanoparticle to polymer layer thickness ratio in the initial bilayer. The UCaRI approach is versatile and widely applicable to various polymers, which allows generation of nanoporous PINFs for multiple applications.
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Affiliation(s)
- Jyo Lyn Hor
- Department of Chemical and Biomolecular Engineering and ‡Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Yijie Jiang
- Department of Chemical and Biomolecular Engineering and ‡Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - David J Ring
- Department of Chemical and Biomolecular Engineering and ‡Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Robert A Riggleman
- Department of Chemical and Biomolecular Engineering and ‡Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Kevin T Turner
- Department of Chemical and Biomolecular Engineering and ‡Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
| | - Daeyeon Lee
- Department of Chemical and Biomolecular Engineering and ‡Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States
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1454
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Paulraj T, Riazanova AV, Yao K, Andersson RL, Müllertz A, Svagan AJ. Bioinspired Layer-by-Layer Microcapsules Based on Cellulose Nanofibers with Switchable Permeability. Biomacromolecules 2017; 18:1401-1410. [DOI: 10.1021/acs.biomac.7b00126] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Thomas Paulraj
- Wallenberg
Wood Science Center and Department of Fiber and Polymer Technology and ∥Fiber and Polymer
Technology, School of Chemical Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden
| | - Anastasia V. Riazanova
- Wallenberg
Wood Science Center and Department of Fiber and Polymer Technology and ∥Fiber and Polymer
Technology, School of Chemical Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden
| | - Kun Yao
- School
of Biotechnology, Royal Institute of Technology, Alba Nova University Centre, 10691, Stockholm, Sweden
| | | | - Anette Müllertz
- Department
of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Anna J. Svagan
- Wallenberg
Wood Science Center and Department of Fiber and Polymer Technology and ∥Fiber and Polymer
Technology, School of Chemical Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden
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1455
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Eliaz N, Metoki N. Calcium Phosphate Bioceramics: A Review of Their History, Structure, Properties, Coating Technologies and Biomedical Applications. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E334. [PMID: 28772697 PMCID: PMC5506916 DOI: 10.3390/ma10040334] [Citation(s) in RCA: 393] [Impact Index Per Article: 56.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Revised: 03/15/2017] [Accepted: 03/22/2017] [Indexed: 02/06/2023]
Abstract
Calcium phosphate (CaP) bioceramics are widely used in the field of bone regeneration, both in orthopedics and in dentistry, due to their good biocompatibility, osseointegration and osteoconduction. The aim of this article is to review the history, structure, properties and clinical applications of these materials, whether they are in the form of bone cements, paste, scaffolds, or coatings. Major analytical techniques for characterization of CaPs, in vitro and in vivo tests, and the requirements of the US Food and Drug Administration (FDA) and international standards from CaP coatings on orthopedic and dental endosseous implants, are also summarized, along with the possible effect of sterilization on these materials. CaP coating technologies are summarized, with a focus on electrochemical processes. Theories on the formation of transient precursor phases in biomineralization, the dissolution and reprecipitation as bone of CaPs are discussed. A wide variety of CaPs are presented, from the individual phases to nano-CaP, biphasic and triphasic CaP formulations, composite CaP coatings and cements, functionally graded materials (FGMs), and antibacterial CaPs. We conclude by foreseeing the future of CaPs.
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Affiliation(s)
- Noam Eliaz
- Biomaterials and Corrosion Lab, Department of Materials Science and Engineering, Tel-Aviv University, Ramat Aviv 6997801, Israel.
| | - Noah Metoki
- Biomaterials and Corrosion Lab, Department of Materials Science and Engineering, Tel-Aviv University, Ramat Aviv 6997801, Israel.
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1456
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Myllymäki TTT, Lemetti L, Nonappa, Ikkala O. Hierarchical Supramolecular Cross-Linking of Polymers for Biomimetic Fracture Energy Dissipating Sacrificial Bonds and Defect Tolerance under Mechanical Loading. ACS Macro Lett 2017; 6:210-214. [PMID: 35650915 DOI: 10.1021/acsmacrolett.7b00011] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Biological structural materials offer fascinating models how to synergistically increase the solid-state defect tolerance, toughness, and strength using nanocomposite structures by incorporating different levels of supramolecular sacrificial bonds to dissipate fracture energy. Inspired thereof, we show how to turn a commodity acrylate polymer, characteristically showing a brittle solid state fracture, to become defect tolerant manifesting noncatastrophic crack propagation by incorporation of different levels of fracture energy dissipating supramolecular interactions. Therein, poly(2-hydroxyethyl methacrylate) (pHEMA) is a feasible model polymer showing brittle solid state fracture in spite of a high maximum strain and clear yielding, where the weak hydroxyl group mediated hydrogen bonds do not suffice to dissipate fracture energy. We provide the next level stronger supramolecular interactions toward solid-state networks by postfunctionalizing a minor part of the HEMA repeat units using 2-ureido-4[1H]-pyrimidinone (UPy), capable of forming four strong parallel hydrogen bonds. Interestingly, such a polymer, denoted here as p(HEMA-co-UPyMA), shows toughening by suppressed catastrophic crack propagation, even if the strength and stiffness are synergistically increased. At the still higher hierarchical level, colloidal level cross-linking using oxidized carbon nanotubes with hydrogen bonding surface decorations, including UPy, COOH, and OH groups, leads to further increased stiffness and ultimate strength, still leading to suppressed catastrophic crack propagation. The findings suggest to incorporate a hierarchy of supramolecular groups of different interactions strengths upon pursuing toward biomimetic toughening.
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Affiliation(s)
- Teemu T. T. Myllymäki
- Department
of Applied Physics, Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland
| | - Laura Lemetti
- School
of Chemical Technology, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Nonappa
- Department
of Applied Physics, Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland
| | - Olli Ikkala
- Department
of Applied Physics, Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland
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1457
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Zhang L, Li R, Chen H, Wei J, Qian H, Su S, Shao J, Wang L, Qian X, Liu B. Human cytotoxic T-lymphocyte membrane-camouflaged nanoparticles combined with low-dose irradiation: a new approach to enhance drug targeting in gastric cancer. Int J Nanomedicine 2017; 12:2129-2142. [PMID: 28360520 PMCID: PMC5364008 DOI: 10.2147/ijn.s126016] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Cell membrane-derived nanoparticles are becoming more attractive because of their ability to mimic many features of their source cells. This study reports on a biomimetic delivery platform based on human cytotoxic T-lymphocyte membranes. In this system, the surface of poly-lactic-co-glycolic acid nanoparticles was camouflaged using T-lymphocyte membranes, and local low-dose irradiation (LDI) was used as a chemoattractant for nanoparticle targeting. The T-lymphocyte membrane coating was verified using dynamic light scattering, transmission electron microscopy, and confocal laser scanning microscopy. This new platform reduced nanoparticle phagocytosis by macrophages to 23.99% (P=0.002). Systemic administration of paclitaxel-loaded T-lymphocyte membrane-coated nanoparticles inhibited the growth of human gastric cancer by 56.68% in Balb/c nude mice. Application of LDI at the tumor site significantly increased the tumor growth inhibition rate to 88.50%, and two mice achieved complete remission. Furthermore, LDI could upregulate the expression of adhesion molecules in tumor vessels, which is important in the process of leukocyte adhesion and might contribute to the localization of T-lymphocyte membrane-encapsulated nanoparticles in tumors. Therefore, this new drug-delivery platform retained both the long circulation time and tumor site accumulation ability of human cytotoxic T lymphocytes, while local LDI could significantly enhance tumor localization.
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Affiliation(s)
- Lianru Zhang
- The Comprehensive Cancer Centre of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, People’s Republic of China
| | - Rutian Li
- The Comprehensive Cancer Centre of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, People’s Republic of China
| | - Hong Chen
- The Comprehensive Cancer Centre of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, People’s Republic of China
| | - Jia Wei
- The Comprehensive Cancer Centre of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, People’s Republic of China
| | - Hanqing Qian
- The Comprehensive Cancer Centre of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, People’s Republic of China
| | - Shu Su
- The Comprehensive Cancer Centre of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, People’s Republic of China
| | - Jie Shao
- The Comprehensive Cancer Centre of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, People’s Republic of China
| | - Lifeng Wang
- The Comprehensive Cancer Centre of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, People’s Republic of China
| | - Xiaoping Qian
- The Comprehensive Cancer Centre of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, People’s Republic of China
| | - Baorui Liu
- The Comprehensive Cancer Centre of Drum Tower Hospital, Medical School of Nanjing University and Clinical Cancer Institute of Nanjing University, Nanjing, People’s Republic of China
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1458
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Paik T, Yun H, Fleury B, Hong SH, Jo PS, Wu Y, Oh SJ, Cargnello M, Yang H, Murray CB, Kagan CR. Hierarchical Materials Design by Pattern Transfer Printing of Self-Assembled Binary Nanocrystal Superlattices. NANO LETTERS 2017; 17:1387-1394. [PMID: 28146634 DOI: 10.1021/acs.nanolett.6b04279] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We demonstrate the fabrication of hierarchical materials by controlling the structure of highly ordered binary nanocrystal superlattices (BNSLs) on multiple length scales. Combinations of magnetic, plasmonic, semiconducting, and insulating colloidal nanocrystal (NC) building blocks are self-assembled into BNSL membranes via the liquid-interfacial assembly technique. Free-standing BNSL membranes are transferred onto topographically structured poly(dimethylsiloxane) molds via the Langmuir-Schaefer technique and then deposited in patterns onto substrates via transfer printing. BNSLs with different structural motifs are successfully patterned into various meso- and microstructures such as lines, circles, and even three-dimensional grids across large-area substrates. A combination of electron microscopy and grazing incidence small-angle X-ray scattering (GISAXS) measurements confirm the ordering of NC building blocks in meso- and micropatterned BNSLs. This technique demonstrates structural diversity in the design of hierarchical materials by assembling BNSLs from NC building blocks of different composition and size by patterning BNSLs into various size and shape superstructures of interest for a broad range of applications.
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Affiliation(s)
- Taejong Paik
- School of Integrative Engineering, Chung-Ang University , Seoul, 06974, South Korea
| | | | | | - Sung-Hoon Hong
- Electronics and Telecommunications Research Institute , Daejeon, 34129, South Korea
| | - Pil Sung Jo
- Complex Assemblies of Soft Matter, CNRS-SOLVAY-PENN UMI 3254 , Bristol, Pennsylvania 19007, United States
| | | | - Soong-Ju Oh
- Department of Materials Science and Engineering, Korea University , Seoul 02841, South Korea
| | - Matteo Cargnello
- Department of Chemical Engineering and SUNCAT Center for Interface Science and Catalysis, Stanford University , Stanford, California 94305, United States
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1459
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Toivonen MS, Kurki-Suonio S, Wagermaier W, Hynninen V, Hietala S, Ikkala O. Interfacial Polyelectrolyte Complex Spinning of Cellulose Nanofibrils for Advanced Bicomponent Fibers. Biomacromolecules 2017; 18:1293-1301. [DOI: 10.1021/acs.biomac.7b00059] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Matti S. Toivonen
- Molecular
Materials, Department of Applied Physics, Aalto University (previously Helsinki
University of Technology), P.O. Box 15100, FIN-00076 Aalto, Espoo, Finland
| | - Sauli Kurki-Suonio
- Molecular
Materials, Department of Applied Physics, Aalto University (previously Helsinki
University of Technology), P.O. Box 15100, FIN-00076 Aalto, Espoo, Finland
| | - Wolfgang Wagermaier
- Department
of Biomaterials, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany
| | - Ville Hynninen
- Molecular
Materials, Department of Applied Physics, Aalto University (previously Helsinki
University of Technology), P.O. Box 15100, FIN-00076 Aalto, Espoo, Finland
| | - Sami Hietala
- Department
of Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland
| | - Olli Ikkala
- Molecular
Materials, Department of Applied Physics, Aalto University (previously Helsinki
University of Technology), P.O. Box 15100, FIN-00076 Aalto, Espoo, Finland
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1460
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Geologically-inspired strong bulk ceramics made with water at room temperature. Nat Commun 2017; 8:14655. [PMID: 28262760 PMCID: PMC5343517 DOI: 10.1038/ncomms14655] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 01/12/2017] [Indexed: 11/26/2022] Open
Abstract
Dense ceramic materials can form in nature under mild temperatures in water. By contrast, man-made ceramics often require sintering temperatures in excess of 1,400 °C for densification. Chemical strategies inspired by biomineralization processes have been demonstrated but remain limited to the fabrication of thin films and particles. Besides biomineralization, the formation of dense ceramic-like materials such as limestone also occurs in nature through large-scale geological processes. Inspired by the geological compaction of mineral sediments in nature, we report a room-temperature method to produce dense and strong ceramics within timescales comparable to those of conventional manufacturing processes. Using nanoscale powders and high compaction pressures, we show that such cold sintering process can be realized with water at room temperature to result in centimetre-sized bulk parts with specific strength that is comparable to, and occasionally even higher than, that of traditional structural materials like concrete. Milder conditions for processing ceramics is of interest for a range of uses. Here authors report room temperature sintering of nanoparticulate powders using a solution-assisted route, yielding parts with centimetre-sized bulk parts with specific strength comparable to and possibly surpassing that of traditional structural materials like concrete.
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1461
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Liang BL, Shu YQ, Yin PG, Guo L. Nacre-inspired polyglutamic acid/layered double hydroxide bionanocomposite film with high mechanical, translucence and UV-blocking properties. CHINESE JOURNAL OF POLYMER SCIENCE 2017. [DOI: 10.1007/s10118-017-1924-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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1462
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Liang Y, Chen L, Zhuang D, Liu H, Fu R, Zhang M, Wu D, Matyjaszewski K. Fabrication and nanostructure control of super-hierarchical carbon materials from heterogeneous bottlebrushes. Chem Sci 2017; 8:2101-2106. [PMID: 28507662 PMCID: PMC5407264 DOI: 10.1039/c6sc03961h] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Accepted: 11/24/2016] [Indexed: 11/21/2022] Open
Abstract
Advances in the performances of many modern materials fundamentally depend upon the exploitation of new micro/nanostructures. Therefore, ingenious design of hierarchical structures through the mimicking of natural systems is of increasing importance. Currently, there is an urgent need for creation of multidimensional carbonaceous structures by integrating a customized hierarchical pore architecture and hybrid carbon framework. Here we report the pioneering fabrication of novel super-hierarchical carbons with a unique carbonaceous hybrid nanotube-interconnected porous network structure by utilizing well-defined carbon nanotube@polystyrene bottlebrushes as building blocks. Hypercrosslinking of such heterogeneous core-shell structured building blocks not only allows for constructing amorphous microporous carbon shells on the surface of graphitic carbon nanotube cores, but also leads to formation of covalently interconnected nanoscale networks. Benefiting from such a well-orchestrated structure, these super-hierarchical carbons exhibit good electrochemical performances. Our findings may open up a new avenue for fabrication of unique and unusual functional carbon materials which possess well-orchestrated structural hierarchy and thus generate valuable breakthroughs in many applications including energy, adsorption, separation, catalysis and medicine.
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Affiliation(s)
- Yeru Liang
- Materials Science Institute , PCFM Lab and GDHPPC Lab , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , P. R. China .
- College of Materials and Energy , South China Agricultural University , Guangzhou 510642 , P. R. China
| | - Luyi Chen
- Materials Science Institute , PCFM Lab and GDHPPC Lab , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , P. R. China .
| | - Dongyang Zhuang
- Materials Science Institute , PCFM Lab and GDHPPC Lab , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , P. R. China .
| | - Hao Liu
- Materials Science Institute , PCFM Lab and GDHPPC Lab , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , P. R. China .
| | - Ruowen Fu
- Materials Science Institute , PCFM Lab and GDHPPC Lab , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , P. R. China .
| | - Mingqiu Zhang
- Materials Science Institute , PCFM Lab and GDHPPC Lab , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , P. R. China .
| | - Dingcai Wu
- Materials Science Institute , PCFM Lab and GDHPPC Lab , School of Chemistry and Chemical Engineering , Sun Yat-sen University , Guangzhou 510275 , P. R. China .
| | - Krzysztof Matyjaszewski
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , PA 15213 , USA
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1463
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Song Y, Zhang C, Wang P, Wang L, Bao C, Weir MD, Reynolds MA, Ren K, Zhao L, Xu HHK. Engineering bone regeneration with novel cell-laden hydrogel microfiber-injectable calcium phosphate scaffold. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:895-905. [PMID: 28415545 DOI: 10.1016/j.msec.2017.02.158] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 02/26/2017] [Accepted: 02/27/2017] [Indexed: 02/05/2023]
Abstract
Cell-based tissue engineering is promising to create living functional tissues for bone regeneration. The implanted cells should be evenly distributed in the scaffold, be fast-released to the defect and maintain high viability in order to actively participate in the regenerative process. Herein, we report an injectable calcium phosphate cement (CPC) scaffold containing cell-encapsulating hydrogel microfibers with desirable degradability that could deliver cells in a timely manner and maintain cell viability. Microfibers were synthesized using partially-oxidized alginate with various concentrations (0-0.8%) of fibrinogen to optimize the degradation rate of the alginate-fibrin microfibers (Alg-Fb MF). A fibrin concentration of 0.4% in Alg-Fb MF resulted in the greatest enhancement of cell migration, release and proliferation. Interestingly, a significant amount of cell-cell contact along the long-axis of the microfibers was established in Alg-0.4%Fb MF as early as day 2. The injectable tissue engineered construct for bone reconstruct was fabricated by mixing the fast-degradable Alg-0.4%Fb MF with CPC paste at 1:1 volume ratio. In vitro study showed that cells re-collected from the construct maintained good viability and osteogenic potentials. In vivo study demonstrated that the hBMSC-encapsulated CPC-MF tissue engineered construct displayed a robust capacity for bone regeneration. At 12weeks after implantation, osseous bridge in the rat mandibular defect was observed in CPC-MF-hBMSCs group with a new bone area fraction of (42.1±7.8) % in the defects, which was >3-fold that of the control group. The novel tissue-engineered construct presents an excellent prospect for a wide range of dental, craniofacial and orthopedic applications.
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Affiliation(s)
- Yang Song
- Department of Prosthodontics, Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, China; Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Chi Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China; Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Ping Wang
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA.
| | - Lin Wang
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; VIP Integrated Department, School and Hospital of Stomatology, Jilin University, Changchun, Jilin 130011, China
| | - Chunyun Bao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China; Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Michael D Weir
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Mark A Reynolds
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Ke Ren
- Department of Neural and Pain Sciences, School of Dentistry, Program in Neuroscience, University of Maryland, Baltimore, MD 21201, USA
| | - Liang Zhao
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Department of Orthopaedic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China.
| | - Hockin H K Xu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China; Center for Stem Cell Biology and Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA; University of Maryland Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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1464
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Yang Y, Chen Z, Song X, Zhang Z, Zhang J, Shung KK, Zhou Q, Chen Y. Biomimetic Anisotropic Reinforcement Architectures by Electrically Assisted Nanocomposite 3D Printing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:10.1002/adma.201605750. [PMID: 28185341 PMCID: PMC7032659 DOI: 10.1002/adma.201605750] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 12/09/2016] [Indexed: 05/23/2023]
Abstract
Biomimetic architectures with Bouligand-type carbon nanotubes are fabricated by an electrically assisted 3D-printing method. The enhanced impact resistance is attributed to the energy dissipation by the rotating anisotropic layers. This approach is used to mimic the collagen-fiber alignment in the human meniscus to create a reinforced artificial meniscus with circumferentially and radially aligned carbon nanotubes.
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Affiliation(s)
- Yang Yang
- Epstein Department of Industrial and Systems Engineering, Department of Aerospace and Mechanical Engineering, Viterbi School of Engineering, University of Southern California, 3715 McClintock Ave, Los Angeles, CA 90089-01932
| | - Zeyu Chen
- Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California. 3650 McClintock Ave, Los Angeles, CA 90089
- School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, China
| | - Xuan Song
- Epstein Department of Industrial and Systems Engineering, Department of Aerospace and Mechanical Engineering, Viterbi School of Engineering, University of Southern California, 3715 McClintock Ave, Los Angeles, CA 90089-01932
- Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa City, Iowa, 52242
| | - Zhuofeng Zhang
- Epstein Department of Industrial and Systems Engineering, Department of Aerospace and Mechanical Engineering, Viterbi School of Engineering, University of Southern California, 3715 McClintock Ave, Los Angeles, CA 90089-01932
| | - Jun Zhang
- Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California. 3650 McClintock Ave, Los Angeles, CA 90089
- School of Power and Mechanical Engineering, Wuhan University, Wuhan, 430072
| | - K. Kirk Shung
- Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California. 3650 McClintock Ave, Los Angeles, CA 90089
| | - Qifa Zhou
- Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California. 3650 McClintock Ave, Los Angeles, CA 90089
| | - Yong Chen
- Epstein Department of Industrial and Systems Engineering, Department of Aerospace and Mechanical Engineering, Viterbi School of Engineering, University of Southern California, 3715 McClintock Ave, Los Angeles, CA 90089-01932
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1465
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Saleh MS, Hu C, Panat R. Three-dimensional microarchitected materials and devices using nanoparticle assembly by pointwise spatial printing. SCIENCE ADVANCES 2017; 3:e1601986. [PMID: 28275733 PMCID: PMC5336350 DOI: 10.1126/sciadv.1601986] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 02/01/2017] [Indexed: 05/19/2023]
Abstract
Three-dimensional (3D) hierarchical materials are important to a wide range of emerging technological applications. We report a method to synthesize complex 3D microengineered materials, such as microlattices, with nearly fully dense truss elements with a minimum diameter of approximately 20 μm and having high aspect ratios (up to 20:1) without using any templating or supporting materials. By varying the postprocessing conditions, we have also introduced an additional control over the internal porosity of the truss elements to demonstrate a hierarchical porous structure with an overall void size and feature size control of over five orders of magnitudes in length scale. The method uses direct printing of nanoparticle dispersions using the Aerosol Jet technology in 3D space without templating or supporting materials followed by binder removal and sintering. In addition to 3D microlattices, we have also demonstrated directly printed stretchable interconnects, spirals, and pillars. This assembly method could be implemented by a variety of microdroplet generation methods for fast and large-scale fabrication of the hierarchical materials for applications in tissue engineering, ultralight or multifunctional materials, microfluidics, and micro-optoelectronics.
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Affiliation(s)
- Mohammad Sadeq Saleh
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99163, USA
| | - Chunshan Hu
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99163, USA
| | - Rahul Panat
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99163, USA
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1466
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Affiliation(s)
- Nailiang Yang
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
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1467
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Hughes EAB, Williams RL, Cox SC, Grover LM. Biologically Analogous Calcium Phosphate Tubes from a Chemical Garden. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2059-2067. [PMID: 28135096 DOI: 10.1021/acs.langmuir.6b04574] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Calcium phosphate (CaPO4) tubes with features comparable to mineralized biological microstructures, such as Haversian canals, were grown from a calcium gel/phosphate solution chemical garden system. A significant difference in gel mass in response to high and low solute phosphate equivalent environments existed within 30 min of solution layering upon gel (p = 0.0067), suggesting that the nature of advective movement between gel and solution is dependent on the solution concentration. The transport of calcium cations (Ca2+) and phosphate anions (PO43-) was quantified and changes in pH were monitored to explain the preferential formation of tubes within a PO43- concentration range of 0.5-1.25 M. Ingress from the anionic solution phase into the gel followed by the liberation of Ca2+ ions from the gel was found to be essential for acquiring self-assembled tubular CaPO4 structures. Tube analysis by scanning electron microscopy (SEM), X-ray diffraction (XRD), and micro X-ray florescence (μ-XRF) revealed hydroxyapatite (HA, Ca10(PO4)6(OH)2) and dicalcium phosphate dihydrate (DCPD, CaHPO4·2H2O) phases organized in a hierarchical manner. Notably, the tubule diameters ranged from 100 to 150 μm, an ideal size for the permeation of vasculature in biological hard tissue.
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Affiliation(s)
- Erik A B Hughes
- School of Chemical Engineering, University of Birmingham , Edgbaston B15 2TT, U.K
| | - Richard L Williams
- School of Chemical Engineering, University of Birmingham , Edgbaston B15 2TT, U.K
| | - Sophie C Cox
- School of Chemical Engineering, University of Birmingham , Edgbaston B15 2TT, U.K
| | - Liam M Grover
- School of Chemical Engineering, University of Birmingham , Edgbaston B15 2TT, U.K
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1468
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Graupner N, Labonte D, Humburg H, Buzkan T, Dörgens A, Kelterer W, Müssig J. Functional gradients in the pericarp of the green coconut inspire asymmetric fibre-composites with improved impact strength, and preserved flexural and tensile properties. BIOINSPIRATION & BIOMIMETICS 2017; 12:026009. [PMID: 28245197 DOI: 10.1088/1748-3190/aa5262] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Here we investigate the mechanical properties and structural design of the pericarp of the green coconut (Cocos nucifera L.). The pericarp showed excellent impact characteristics, and mechanical tests of its individual components revealed gradients in stiffness, strength and elongation at break from the outer to the inner layer of the pericarp. In order to understand more about the potential effect of such gradients on 'bulk' material properties, we designed simple, graded, cellulose fibre-reinforced polylactide (PLA) composites by stacking layers reinforced with fibres of different mechanical properties. Tensile properties of the graded composites were largely determined by the 'weakest' fibre, irrespective of the fibre distribution. However, a graded design led to pronounced asymmetric bending and impact properties. Bio-inspired, asymmetrically graded composites showed a flexural strength and modulus comparable to that of the strongest reference samples, but the elongation at maximum load was dependent on the specimen orientation. The impact strength of the graded composites showed a similar orientation-dependence, and peak values exceeded the impact strength of a non-graded reference composite containing identical fibre fractions by up to a factor of three. In combination, our results show that an asymmetric, systematic variation of fibre properties can successfully combine desirable properties of different fibre types, suggesting new routes for the development of high-performance composites, and improving our understanding of the structure-function relationship of the coconut pericarp.
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Affiliation(s)
- Nina Graupner
- HSB-City University of Applied Sciences Bremen, Biomimetics-The Biological Materials Group, Bremen, Germany
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1469
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Divakar P, Trembly BS, Moodie KL, Hoopes PJ, Wegst UGK. Preliminary Assessment of a Hysteroscopic Fallopian Tube Heat and Biomaterial Technology for Permanent Female Sterilization. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2017; 10066. [PMID: 31363298 DOI: 10.1117/12.2255843] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Recent failures in hysteroscopic female sterilization procedures have brought into question the implantation of non-resorbable metal devices into the fallopian tubes due to long-term risks such as migration, fragmentation, and tubal perforation. The goal of this study is to assess whether a porous, biodegradable implant can be deposited into the fallopian tube lumen with or without a local mild heat treatment to generate a safe and permanent fallopian tube occlusion/sterilization event. The technologies investigated included freeze-cast collagen-based scaffolds and magnetic nanoparticle (MNP) based scaffolds. In vitro assessment of iron oxide MNP-based scaffolds was performed to determine the absorption rate density (ARD); subsequent computational modeling quantified the thermal in vivo steady state temperature as a function of tubal radius for treatment planning. For collagen-based scaffolds, in vivo testing was performed to study the biocompatibility in a mouse flank model, followed by implantation into an in vivo anestrus feline uterine horn (animal model for the fallopian tube). Biological responses were studied histopathologically. Uterine horn patency was assessed via radiographic imaging. Preliminary studies suggest the MNP-impregnated scaffold and a safe, noninvasive AMF excitation field have potential to generate a sufficient focal fallopian tube thermal dose to create a fibrotic healing event and ultimately, permanent tubal occlusion.
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Affiliation(s)
- Prajan Divakar
- Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
| | - B Stuart Trembly
- Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
| | - Karen L Moodie
- Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, USA
| | - P Jack Hoopes
- Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA.,Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, USA
| | - Ulrike G K Wegst
- Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
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1470
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Yang J, Xu F, Han CR. Metal Ion Mediated Cellulose Nanofibrils Transient Network in Covalently Cross-linked Hydrogels: Mechanistic Insight into Morphology and Dynamics. Biomacromolecules 2017; 18:1019-1028. [DOI: 10.1021/acs.biomac.6b01915] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jun Yang
- Beijing Key Laboratory of
Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
| | - Feng Xu
- Beijing Key Laboratory of
Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
| | - Chun-Rui Han
- Beijing Key Laboratory of
Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China
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1471
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Li Y, Xiao Y, Liu C. The Horizon of Materiobiology: A Perspective on Material-Guided Cell Behaviors and Tissue Engineering. Chem Rev 2017; 117:4376-4421. [PMID: 28221776 DOI: 10.1021/acs.chemrev.6b00654] [Citation(s) in RCA: 345] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Although the biological functions of cell and tissue can be regulated by biochemical factors (e.g., growth factors, hormones), the biophysical effects of materials on the regulation of biological activity are receiving more attention. In this Review, we systematically summarize the recent progress on how biomaterials with controllable properties (e.g., compositional/degradable dynamics, mechanical properties, 2D topography, and 3D geometry) can regulate cell behaviors (e.g., cell adhesion, spreading, proliferation, cell alignment, and the differentiation or self-maintenance of stem cells) and tissue/organ functions. How the biophysical features of materials influence tissue/organ regeneration have been elucidated. Current challenges and a perspective on the development of novel materials that can modulate specific biological functions are discussed. The interdependent relationship between biomaterials and biology leads us to propose the concept of "materiobiology", which is a scientific discipline that studies the biological effects of the properties of biomaterials on biological functions at cell, tissue, organ, and the whole organism levels. This Review highlights that it is more important to develop ECM-mimicking biomaterials having a self-regenerative capacity to stimulate tissue regeneration, instead of attempting to recreate the complexity of living tissues or tissue constructs ex vivo. The principles of materiobiology may benefit the development of novel biomaterials providing combinative bioactive cues to activate the migration of stem cells from endogenous reservoirs (i.e., cell niches), stimulate robust and scalable self-healing mechanisms, and unlock the body's innate powers of regeneration.
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Affiliation(s)
- Yulin Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology , Meilong Road 130, Shanghai 200237, People's Republic of China
| | - Yin Xiao
- Institute of Health and Biomedical Innovation, Queensland University of Technology , Kelvin Grove, Brisbane, Queensland 4059, Australia
| | - Changsheng Liu
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology , Meilong Road 130, Shanghai 200237, People's Republic of China
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1472
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Knöller A, Runčevski T, Dinnebier RE, Bill J, Burghard Z. Cuttlebone-like V 2O 5 Nanofibre Scaffolds - Advances in Structuring Cellular Solids. Sci Rep 2017; 7:42951. [PMID: 28218301 PMCID: PMC5317173 DOI: 10.1038/srep42951] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 01/17/2017] [Indexed: 11/23/2022] Open
Abstract
The synthesis of ceramic materials combining high porosity and permeability with good mechanical stability is challenging, as optimising the latter requires compromises regarding the first two properties. Nonetheless, significant progress can be made in this direction by taking advantage of the structural design principles evolved by nature. Natural cellular solids achieve good mechanical stability via a defined hierarchical organisation of the building blocks they are composed of. Here, we report the first synthetic, ceramic-based scaffold whose architecture closely mimics that of cuttlebone –a structural biomaterial whose porosity exceeds that of most other natural cellular solids, whilst preserving an excellent mechanical strength. The nanostructured, single-component scaffold, obtained by ice-templated assembly of V2O5 nanofibres, features a highly sophisticated and elaborate architecture of equally spaced lamellas, which are regularly connected by pillars as lamella support. It displays an unprecedented porosity of 99.8 %, complemented by an enhanced mechanical stability. This novel bioinspired, functional material not only displays mechanical characteristics similar to natural cuttlebone, but the multifunctionality of the V2O5 nanofibres also renders possible applications, including catalysts, sensors and electrodes for energy storage.
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Affiliation(s)
- Andrea Knöller
- Institute for Materials Science, University of Stuttgart, Heisenbergstr. 3, 70569 Stuttgart, Germany
| | - Tomče Runčevski
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, USA.,Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Robert E Dinnebier
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany
| | - Joachim Bill
- Institute for Materials Science, University of Stuttgart, Heisenbergstr. 3, 70569 Stuttgart, Germany
| | - Zaklina Burghard
- Institute for Materials Science, University of Stuttgart, Heisenbergstr. 3, 70569 Stuttgart, Germany
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1473
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Ma B, Zhang S, Liu R, Qiu J, Zhao L, Wang S, Li J, Sang Y, Jiang H, Liu H. Prolonged fluorescence lifetime of carbon quantum dots by combining with hydroxyapatite nanorods for bio-applications. NANOSCALE 2017; 9:2162-2171. [PMID: 27849086 DOI: 10.1039/c6nr05983j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Carbon quantum dots (CQDs) are a new type of fluorescent nanoparticle for cell imaging and tracking. However, they would easily diffuse and quench, followed by the loss of their fluorescence ability. By connecting their functional groups with other nanoparticles, the CQDs will be protected from destruction and exhibit long-time fluorescence. Here, carbon quantum dot-hydroxyapatite (CQD-HAp) hybrid nanorods were prepared by the self-assembly of CQDs on the surface of HAp nanorods through a facile one-pot process. The morphology and size of the CQD-HAp hybrid nanorods can be well controlled by using oleic acid, which meanwhile is the source of CQDs. The hydrophilic CQD-HAp hybrid nanorods have prolonged fluorescence life due to the connection between CQDs and HAp nanorods, and exhibit a higher fluorescence quantum yield than pure CQDs. In addition, when hybrid nanorods load doxorubicin (Dox) to form Dox-CQD-HAp hybrid nanorods, they can more efficiently kill human cervical cancer (HeLa) cells, rather than human prostatic cancer (PC-3) cells. Long time fluorescence for cell imaging and high efficiency in killing cancer cells as a drug-delivery medium make CQD-HAp hybrid nanorods have great potential applications in the bio-field.
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Affiliation(s)
- Baojin Ma
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
| | - Shan Zhang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
| | - Ruoyu Liu
- Department of Physics, Reed College, USA
| | - Jichuan Qiu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
| | - Lili Zhao
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
| | - Shicai Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
| | - Jianhua Li
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
| | - Yuanhua Sang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
| | - Huaidong Jiang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
| | - Hong Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, China.
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1474
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Using graphene networks to build bioinspired self-monitoring ceramics. Nat Commun 2017; 8:14425. [PMID: 28181518 PMCID: PMC5309856 DOI: 10.1038/ncomms14425] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 12/20/2016] [Indexed: 11/09/2022] Open
Abstract
The properties of graphene open new opportunities for the fabrication of composites exhibiting unique structural and functional capabilities. However, to achieve this goal we should build materials with carefully designed architectures. Here, we describe the fabrication of ceramic-graphene composites by combining graphene foams with pre-ceramic polymers and spark plasma sintering. The result is a material containing an interconnected, microscopic network of very thin (20-30 nm), electrically conductive, carbon interfaces. This network generates electrical conductivities up to two orders of magnitude higher than those of other ceramics with similar graphene or carbon nanotube contents and can be used to monitor 'in situ' structural integrity. In addition, it directs crack propagation, promoting stable crack growth and increasing the fracture resistance by an order of magnitude. These results demonstrate that the rational integration of nanomaterials could be a fruitful path towards building composites combining unique mechanical and functional performances.
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1475
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Architected cellular ceramics with tailored stiffness via direct foam writing. Proc Natl Acad Sci U S A 2017; 114:1832-1837. [PMID: 28179570 DOI: 10.1073/pnas.1616769114] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Hierarchical cellular structures are ubiquitous in nature because of their low-density, high-specific properties, and multifunctionality. Inspired by these systems, we created lightweight ceramic architectures composed of closed-cell porous struts patterned in the form of hexagonal and triangular honeycombs by direct foam writing. The foam ink contains bubbles stabilized by attractive colloidal particles suspended in an aqueous solution. The printed and sintered ceramic foam honeycombs possess low relative density (∼6%). By tailoring their microstructure and geometry, we created honeycombs with different modes of deformation, exceptional specific stiffness, and stiffness values that span over an order of magnitude. This capability represents an important step toward the scalable fabrication of hierarchical porous materials for applications, including lightweight structures, thermal insulation, tissue scaffolds, catalyst supports, and electrodes.
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1476
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Abstract
Natural biomaterials with hierarchical structures that enable extraordinary capability of detecting chemicals have inspired the interest in producing materials that can mimic these natural structures. This study reports the fabrication of hierarchically-structured, reduced graphene oxide (rGO) aerogels with heavily loaded palladium (Pd), platinum (Pt), nickel (Ni), and tin (Sn) metallic nanoparticles. Metal salts chelated with ethylenediaminetetraacetic acid (EDTA) were mixed with graphene oxide (GO) and then freeze-dried. The subsequent reduction produces rGO/metal nanoparticle aerogels. SEM and EDS results indicated that a loading of 59, 67, 39, and 46 wt % of Pd, Pt, Ni, and Sn nanoparticles was achieved. Pd/rGO aerogels of different Pd nanoparticle concentrations were exposed to H2 gas to monitor the resistance change of the composites. The results suggest that rGO aerogels can achieve a higher nanoparticle loading by using chelation to minimize electrostatic interactions between metal ions and GO. Higher loading of Pd nanoparticles in graphene aerogels lead to improved hydrogen gas sensing performance.
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1477
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Panfilov P, Kabanova A, Guo J, Zhang Z. Transmission electron microscopical study of teenage crown dentin on the nanometer scale. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:994-998. [PMID: 27987798 DOI: 10.1016/j.msec.2016.11.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 10/26/2016] [Accepted: 11/06/2016] [Indexed: 11/20/2022]
Abstract
This is the first transmission electron microscopic study of teenage crown dentin on the nanometer scale. Samples for TEM were prepared by mechanical thinning and chemical polishing that allowed obtaining the electron transparent foils. It was firstly shown that human dentin possesses the layered morphology: the layers are oriented normally to the main axis of a tooth and have the thickness of ~50nm. HA inorganic phase of teenage crown dentin is in the amorphous state. The cellular structure, which was formed from collagen fibers (diameter is ~5nm), are observed near DEJ region in teenage dentin, whereas bioorganic phase of teenage crown dentin near the pulp camera does not contain the collagen fibers. Cracks in dentin thin foils have sharp tips, but big angles of opening (~30°) with plastic zone ahead crack tip. It means that young crown human dentin exhibits ductile or viscous-elastic fracture behavior on the nanometer scale.
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Affiliation(s)
| | | | - Jinming Guo
- Erich Schmid Institute for Materials Science, Austrian Academy of Sciences, Leoben, Austria
| | - Zaoli Zhang
- Erich Schmid Institute for Materials Science, Austrian Academy of Sciences, Leoben, Austria
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1478
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Bielinski AR, Boban M, He Y, Kazyak E, Lee DH, Wang C, Tuteja A, Dasgupta NP. Rational Design of Hyperbranched Nanowire Systems for Tunable Superomniphobic Surfaces Enabled by Atomic Layer Deposition. ACS NANO 2017; 11:478-489. [PMID: 28114759 DOI: 10.1021/acsnano.6b06463] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Superomniphobic surfaces display contact angles of θ* > 150° and low contact angle hysteresis with virtually all high and low surface tension liquids. The introduction of hierarchical scales of texture can increase the contact angles and decrease the contact angle hysteresis of superomniphobic surfaces by reducing the solid-liquid contact area. Thus far, it has not been possible to fabricate superomniphobic surfaces with three or more hierarchical scales of texture where the size, spacing, and angular orientation of features within each scale of texture can be independently varied and controlled. Here, we report a method for tunable control of geometry in hyperbranched ZnO nanowire (NW) structures, which in turn enables the rational design and fabrication of superomniphobic surfaces. Branched NWs with tunable density and orientation were grown via a sequential hydrothermal process, in which atomic layer deposition was used for NW seeding, disruption of epitaxy, and selective blocking of NW nucleation. This approach allows for the rational design and optimization of three-level hierarchical structures, in which the geometric parameters of each level of hierarchy can be individually controlled. We demonstrate the coupled relationships between geometry and contact angles for a variety of liquids, which is supported by mathematical models. The highest performing superomniphobic surface was designed with three levels of hierarchy and achieved the following advancing/receding contact angles with water 172°/170°, hexadecane 166°/156°, octane 162°/145°, and heptane 160°/130°.
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Affiliation(s)
| | | | - Yang He
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh , Pittsburgh, Pennsylvania 15261, United States
| | | | | | - Chongmin Wang
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh , Pittsburgh, Pennsylvania 15261, United States
- Pacific Northwest National Laboratory , Richland, Washington 99354, United States
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1479
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Cymbiola nobilis shell: Toughening mechanisms in a crossed-lamellar structure. Sci Rep 2017; 7:40043. [PMID: 28094256 PMCID: PMC5240333 DOI: 10.1038/srep40043] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 11/30/2016] [Indexed: 12/20/2022] Open
Abstract
Natural structural materials with intricate hierarchical architectures over several length scales exhibit excellent combinations of strength and toughness. Here we report the mechanical response of a crossed-lamellar structure in Cymbiola nobilis shell via stepwise compression tests, focusing on toughening mechanisms. At the lower loads microcracking is developed in the stacked direction, and channel cracking along with uncracked-ligament bridging and aragonite fiber bridging occurs in the tiled direction. At the higher loads the main mechanisms involve cracking deflection in the bridging lamellae in the tiled direction alongside step-like cracking in the stacked direction. A distinctive crack deflection in the form of “convex” paths occurs in alternative lamellae with respect to the channel cracks in the tiled direction. Furthermore, a barb-like interlocking mechanism along with the uneven interfaces in the 1st-order aragonite lamellae is also observed. The unique arrangement of the crossed-lamellar structure provides multiple interfaces which result in a complicated stress field ahead of the crack tip, hence increasing the toughness of shell.
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1480
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Ganesh SD, Saha N, Zandraa O, Zuckermann RN, Sáha P. Peptoids and polypeptoids: biomimetic and bioinspired materials for biomedical applications. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-016-1902-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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1481
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Liu N, Hong J, Zeng X, Pidaparti R, Wang X. Fracture mechanisms in multilayer phosphorene assemblies: from brittle to ductile. Phys Chem Chem Phys 2017; 19:13083-13092. [DOI: 10.1039/c7cp01033h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper studies the transition of fracture patterns of multilayer phosphorene assemblies.
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Affiliation(s)
- Ning Liu
- College of Engineering
- University of Georgia
- Athens
- USA
| | - Jiawang Hong
- Department of Applied Mechanics
- Beijing Institute of Technology
- Beijing 100081
- China
| | - Xiaowei Zeng
- Department of Mechanical Engineering
- University of Texas at San Antonio
- San Antonio
- USA
| | | | - Xianqiao Wang
- College of Engineering
- University of Georgia
- Athens
- USA
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1482
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Wang J, Li H, Zou H, Wang C, Zhang H, Mano JF, Song W. Flexible method for fabricating protein patterns on superhydrophobic platforms controlled by magnetic field. Biomater Sci 2017; 5:408-411. [DOI: 10.1039/c6bm00867d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A flexible, magnetic-field controlled patterning method of water soluble proteins or other functional materials has been developed based on superhydrophobic platforms.
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Affiliation(s)
- Jian Wang
- The State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130023
- P. R. China
| | - Hao Li
- The State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130023
- P. R. China
| | - Haoyang Zou
- The State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130023
- P. R. China
| | - Chenmiao Wang
- The State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130023
- P. R. China
| | - Hao Zhang
- The State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130023
- P. R. China
| | - João F. Mano
- Department of Chemistry
- CICECO
- University of Aveiro
- Aveiro 3810-194
- Portugal
| | - Wenlong Song
- The State Key Laboratory of Supramolecular Structure and Materials
- Jilin University
- Changchun 130023
- P. R. China
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1483
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Wang L, Chen D, Jiang K, Shen G. New insights and perspectives into biological materials for flexible electronics. Chem Soc Rev 2017; 46:6764-6815. [DOI: 10.1039/c7cs00278e] [Citation(s) in RCA: 259] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Materials based on biological materials are becoming increasingly competitive and are likely to be critical components in flexible electronic devices.
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Affiliation(s)
- Lili Wang
- State Key Laboratory on Integrated Optoelectronics
- College of Electronic Science and Engineering
- Jilin University
- Changchun 130012
- P. R. China
| | - Di Chen
- School of Mathematics and Physics
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Kai Jiang
- Institute & Hospital of Hepatobiliary Surgery
- Key Laboratory of Digital Hepatobiliary Surgery of Chinese PLA
- Chinese PLA Medical School
- Chinese PLA General Hospital
- Beijing 100853
| | - Guozhen Shen
- State Key Laboratory for Superlattices and Microstructures
- Institute of Semiconductors
- Chinese Academy of Sciences
- Beijing 100083
- China
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1484
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Al-Maskari NS, McAdams DA, Reddy JN. Modeling of a biological material nacre: Waviness stiffness model. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 70:772-776. [PMID: 27770954 DOI: 10.1016/j.msec.2016.09.061] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 08/15/2016] [Accepted: 09/26/2016] [Indexed: 01/27/2023]
Abstract
Nacre is a tough yet stiff natural composite composed of microscopic mineral polygonal tablets bonded by a tough biopolymer. The high stiffness of nacre is known to be due to its high mineral content. However, the remarkable toughness of nacre is explained by its ability to deform past a yield point and develop large inelastic strain over a large volume around defects and cracks. The high strain is mainly due to sliding and waviness of the tablets. Mimicking nacre's remarkable properties, to date, is still a challenge due in part to fabrication challenges as well as a lack of models that can predict its properties or properties of a bulk material given specific constituent materials and material structure. Previous attempts to create analytical models for nacre include tablet sliding but don't account for the waviness of the tablets. In this work, a mathematical model is proposed to account for the waviness of the tablet. Using this model, a better prediction of the elastic modulus is obtained that agrees with experimental values found in the literature. In addition, the waviness angle can be predicted which is within the recommended range. Having a good representative model aids in designing a bio-mimicked nacre.
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Affiliation(s)
- N S Al-Maskari
- Department of Mechanical Engineering, Texas A&M University, TX 77843-3123, USA.
| | - D A McAdams
- Department of Mechanical Engineering, Texas A&M University, TX 77843-3123, USA
| | - J N Reddy
- Department of Mechanical Engineering, Texas A&M University, TX 77843-3123, USA
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1485
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Du T, Ma S, Pei X, Wang S, Zhou F. Bio-Inspired Design and Fabrication of Micro/Nano-Brush Dual Structural Surfaces for Switchable Oil Adhesion and Antifouling. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1602020. [PMID: 27511623 DOI: 10.1002/smll.201602020] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Indexed: 05/22/2023]
Abstract
The underwater superoleophobic surfaces play a significant role in anti-oil contamination, marine antifouling, etc. Inspired by the Gecko's feet and its self-cleaning property, a hierarchical structure composed of poly (acrylic acid) gel micro-brushes is designed by the liquid-infused method. This surface exhibits underwater superoleophobicity with very low oil adhesion. It is then modified with stimuli-responsive polymer nano-brushes via surface-initiated atom transfer radical polymerization from the embedded initiator. The micro/nano-brush dual structural surfaces can switch the underwater oil adhesion between low and high while keeping the superoleophobicity. The antifouling properties against algae attachment under different mediums are also investigated to show a strong link between oleophobicity and antibiofouling property. The model surface will be very useful in directing the design of marine self-cleaning coatings to both living and non-living species.
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Affiliation(s)
- Tao Du
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shuanhong Ma
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaowei Pei
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Shutao Wang
- Laboratory of Bio-inspired Smart Interface Science, CAS Center for Excellence in Nanoscience, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Feng Zhou
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
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1486
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He M, Zhang Y, Munyemana JC, Wu T, Yang Z, Chen H, Qu W, Xiao J. Tuning the hierarchical nanostructure of hematite mesocrystals via collagen-templated biomineralization. J Mater Chem B 2017; 5:1423-1429. [DOI: 10.1039/c6tb02642g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of hematite mesocrystals with a tunable hierarchical nanostructure plays a critical role in the construction of improved functional materials.
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Affiliation(s)
- Manman He
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Yuping Zhang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jean Claude Munyemana
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Ting Wu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Zhangfu Yang
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Haijun Chen
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Wanpeng Qu
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jianxi Xiao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
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1487
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Chen W, Shen X, Hu Y, Xu K, Ran Q, Yu Y, Dai L, Yuan Z, Huang L, Shen T, Cai K. Surface functionalization of titanium implants with chitosan-catechol conjugate for suppression of ROS-induced cells damage and improvement of osteogenesis. Biomaterials 2017; 114:82-96. [DOI: 10.1016/j.biomaterials.2016.10.055] [Citation(s) in RCA: 133] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 10/07/2016] [Accepted: 10/31/2016] [Indexed: 12/19/2022]
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1488
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Mannan S, Paul Knox J, Basu S. Correlations between axial stiffness and microstructure of a species of bamboo. ROYAL SOCIETY OPEN SCIENCE 2017. [PMID: 28280545 DOI: 10.5061/dryad.5ch51] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Bamboo is a ubiquitous monocotyledonous flowering plant and is a member of the true grass family Poaceae. In many parts of the world, it is widely used as a structural material especially in scaffolding and buildings. In spite of its wide use, there is no accepted methodology for standardizing a species of bamboo for a particular structural purpose. The task of developing structure-property correlations is complicated by the fact that bamboo is a hierarchical material whose structure at the nanoscopic level is not very well explored. However, we show that as far as stiffness is concerned, it is possible to obtain reliable estimates of important structural properties like the axial modulus from the knowledge of certain key elements of the microstructure. Stiffness of bamboo depends most sensitively on the size and arrangement of the fibre sheaths surrounding the vascular bundles and the arrangement of crystalline cellulose microfibrils in their secondary cell walls. For the species of bamboo studied in this work, we have quantitatively determined the radial gradation that the arrangement of fibres renders to the structure. The arrangement of the fibres gives bamboo a radially graded property variation across its cross section.
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Affiliation(s)
- Sayyad Mannan
- Department of Mechanical Engineering , Indian Institute of Technology Kanpur , Kanpur , Uttar Pradesh 208016 , India
| | - J Paul Knox
- Centre for Plant Sciences , Faculty of Biological Sciences , University of Leeds , Leeds LS2 9JT , UK
| | - Sumit Basu
- Department of Mechanical Engineering , Indian Institute of Technology Kanpur , Kanpur , Uttar Pradesh 208016 , India
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1489
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Ovaska M, Bertalan Z, Miksic A, Sugni M, Di Benedetto C, Ferrario C, Leggio L, Guidetti L, Alava MJ, La Porta CA, Zapperi S. Deformation and fracture of echinoderm collagen networks. J Mech Behav Biomed Mater 2017; 65:42-52. [DOI: 10.1016/j.jmbbm.2016.07.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 07/07/2016] [Accepted: 07/31/2016] [Indexed: 11/26/2022]
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1490
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Liu W, Yao Y, Fu O, Jiang S, Fang Y, Wei Y, Lu X. Lignin-derived carbon nanosheets for high-capacitance supercapacitors. RSC Adv 2017. [DOI: 10.1039/c7ra08531a] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We disclose a simple and eco-friendly method to prepare carbon nanosheets (CNSs) by freeze-casting of lignin aqueous dispersion followed by direct carbonization. These lignin-derived CNSs show high performances as electrodes in supercapacitors.
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Affiliation(s)
- Wanshuang Liu
- Donghua University Center for Civil Aviation Composites
- Donghua University
- Shanghai
- China
| | - Yimin Yao
- Donghua University Center for Civil Aviation Composites
- Donghua University
- Shanghai
- China
| | - Ouli Fu
- Donghua University Center for Civil Aviation Composites
- Donghua University
- Shanghai
- China
| | - Sihan Jiang
- Donghua University Center for Civil Aviation Composites
- Donghua University
- Shanghai
- China
| | - Yucheng Fang
- Donghua University Center for Civil Aviation Composites
- Donghua University
- Shanghai
- China
| | - Yi Wei
- Donghua University Center for Civil Aviation Composites
- Donghua University
- Shanghai
- China
| | - Xuehong Lu
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
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1491
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Shang L, Fu F, Cheng Y, Yu Y, Wang J, Gu Z, Zhao Y. Bioinspired Multifunctional Spindle-Knotted Microfibers from Microfluidics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1600286. [PMID: 27071374 DOI: 10.1002/smll.201600286] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/08/2016] [Indexed: 06/05/2023]
Abstract
Heterostructured microfibers with spindle-knots and joints are developed using a novel microfluidic technology, which enables integrative microfiber joint spinning, fluid coating, and knot emulsification. The knots emulsification process can be precisely tunable by adjusting the flow rates. In this way, the size and spacing of the spindle-knots of the microfibers can be achieved with high controllability. More attractively, the construction process benefits from the broad availability of the coating fluids, which determines the compositions of the knots. Thus, the resultant microfibers are imparted with distinctive functions, such as humidity-responsive water capture, thermally triggered water convergence, induced colloidal crystal assembly, and cell microcarrier arrays. These features make such microfibers highly versatile for use in diverse applications.
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Affiliation(s)
- Luoran Shang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- Laboratory of Environment and Biosafety, Research Institute of Southeast University in Suzhou, Suzhou, 215123, China
| | - Fanfan Fu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- Laboratory of Environment and Biosafety, Research Institute of Southeast University in Suzhou, Suzhou, 215123, China
| | - Yao Cheng
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- Laboratory of Environment and Biosafety, Research Institute of Southeast University in Suzhou, Suzhou, 215123, China
| | - Yunru Yu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- Laboratory of Environment and Biosafety, Research Institute of Southeast University in Suzhou, Suzhou, 215123, China
| | - Jie Wang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- Laboratory of Environment and Biosafety, Research Institute of Southeast University in Suzhou, Suzhou, 215123, China
| | - Zhongze Gu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- Laboratory of Environment and Biosafety, Research Institute of Southeast University in Suzhou, Suzhou, 215123, China
| | - Yuanjin Zhao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- Laboratory of Environment and Biosafety, Research Institute of Southeast University in Suzhou, Suzhou, 215123, China
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1492
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1493
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Ding C, Chen Z, Li J. From molecules to macrostructures: recent development of bioinspired hard tissue repair. Biomater Sci 2017; 5:1435-1449. [DOI: 10.1039/c7bm00247e] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This review summarizes the bioinspired strategies for hard tissue repair, ranging from molecule-induced mineralization, to microscale assembly to macroscaffold fabrication.
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Affiliation(s)
- Chunmei Ding
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Zhuoxin Chen
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Jianshu Li
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
- State Key Laboratory of Polymer Materials Engineering
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1494
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Mannan S, Paul Knox J, Basu S. Correlations between axial stiffness and microstructure of a species of bamboo. ROYAL SOCIETY OPEN SCIENCE 2017; 4:160412. [PMID: 28280545 PMCID: PMC5319311 DOI: 10.1098/rsos.160412] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 12/14/2016] [Indexed: 06/06/2023]
Abstract
Bamboo is a ubiquitous monocotyledonous flowering plant and is a member of the true grass family Poaceae. In many parts of the world, it is widely used as a structural material especially in scaffolding and buildings. In spite of its wide use, there is no accepted methodology for standardizing a species of bamboo for a particular structural purpose. The task of developing structure-property correlations is complicated by the fact that bamboo is a hierarchical material whose structure at the nanoscopic level is not very well explored. However, we show that as far as stiffness is concerned, it is possible to obtain reliable estimates of important structural properties like the axial modulus from the knowledge of certain key elements of the microstructure. Stiffness of bamboo depends most sensitively on the size and arrangement of the fibre sheaths surrounding the vascular bundles and the arrangement of crystalline cellulose microfibrils in their secondary cell walls. For the species of bamboo studied in this work, we have quantitatively determined the radial gradation that the arrangement of fibres renders to the structure. The arrangement of the fibres gives bamboo a radially graded property variation across its cross section.
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Affiliation(s)
- Sayyad Mannan
- Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - J. Paul Knox
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK
| | - Sumit Basu
- Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
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1495
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Abraham S, Kumaran SK, Montemagno CD. Gas-switchable carbon nanotube/polymer hybrid membrane for separation of oil-in-water emulsions. RSC Adv 2017. [DOI: 10.1039/c7ra07032b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A gas responsive hybrid membrane is fabricated by surface-grafting PDEAEMA on carbon nanotubes.
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Affiliation(s)
- Sinoj Abraham
- Ingenuity Lab
- Edmonton
- Canada – T6G 2M9
- Department of Chemical and Materials Engineering
- University of Alberta
| | - Surjith Kumar Kumaran
- Ingenuity Lab
- Edmonton
- Canada – T6G 2M9
- Department of Chemical and Materials Engineering
- University of Alberta
| | - Carlo David Montemagno
- Ingenuity Lab
- Edmonton
- Canada – T6G 2M9
- Department of Chemical and Materials Engineering
- University of Alberta
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1496
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Akbarzadeh AH, Cui Y, Chen ZT. Thermal wave: from nonlocal continuum to molecular dynamics. RSC Adv 2017. [DOI: 10.1039/c6ra28831f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
To accommodate effects of thermomass and size-dependency of thermophysical properties on heat transport and to remove the theoretical singularity of temperature gradients across the thermal wavefront NL FTPL heat conduction, corroborated with MD simulation, is introduced.
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Affiliation(s)
- A. H. Akbarzadeh
- Department of Bioresource Engineering
- McGill University
- Island of Montreal
- Canada
| | - Y. Cui
- Department of Mechanical Engineering
- University of Alberta
- Edmonton
- Canada
| | - Z. T. Chen
- Department of Mechanical Engineering
- University of Alberta
- Edmonton
- Canada
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1497
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Hanßke F, Bas O, Vaquette C, Hochleitner G, Groll J, Kemnitz E, Hutmacher DW, Börner HG. Via precise interface engineering towards bioinspired composites with improved 3D printing processability and mechanical properties. J Mater Chem B 2017; 5:5037-5047. [DOI: 10.1039/c7tb00165g] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Precise interface engineering in inorganic–organic hybrid materials enhances both the elastic moduli and toughness of a biodegradable composite, which is of relevance for load-bearing applications in bone tissue engineering.
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Affiliation(s)
- Felix Hanßke
- Humboldt-Universität zu Berlin
- Department of Chemistry
- Laboratory for Organic Synthesis of Functional Systems
- 12489 Berlin
- Germany
| | - Onur Bas
- Centre for Regenerative Medicine
- Queensland University of Technology (QUT)
- Kelvin Grove
- Australia
| | - Cédryck Vaquette
- Centre for Regenerative Medicine
- Queensland University of Technology (QUT)
- Kelvin Grove
- Australia
| | - Gernot Hochleitner
- Department for Functional Materials in Medicine and Dentistry
- University of Würzburg
- 97070 Würzburg
- Germany
| | - Jürgen Groll
- Department for Functional Materials in Medicine and Dentistry
- University of Würzburg
- 97070 Würzburg
- Germany
| | - Erhard Kemnitz
- Humboldt-Universität zu Berlin
- Department of Chemistry
- Laboratory for Organic Synthesis of Functional Systems
- 12489 Berlin
- Germany
| | - Dietmar W. Hutmacher
- Centre for Regenerative Medicine
- Queensland University of Technology (QUT)
- Kelvin Grove
- Australia
- ARC Centre In Additive Biomanufacturing
| | - Hans G. Börner
- Humboldt-Universität zu Berlin
- Department of Chemistry
- Laboratory for Organic Synthesis of Functional Systems
- 12489 Berlin
- Germany
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1498
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Direct observation of the crystallographic relationship between interlamellar membranes and aragonite tablets in bivalve nacre. J Struct Biol 2016; 197:308-311. [PMID: 28025153 DOI: 10.1016/j.jsb.2016.12.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/19/2016] [Accepted: 12/19/2016] [Indexed: 11/22/2022]
Abstract
Nacre is one of the most attractive models for understanding the fundamental principles of biomineralization and for designing bio-inspired materials due to its simple structure but with unusual mechanical properties. It is made up of lamellae of aragonite tablets bonded together by the organic interlamellar membranes (ILMs), of which the latter occupy less than 5wt% of nacre. For a long time, previous authors failed to directly observe the crystallographic relationship between the ILM and aragonite tablet in bivalve shells. Here, using high resolution transmission electron microscope (HRTEM), we investigate the interfacial structure of the domed tablets that coexist with the flat ones in green mussels. We directly observed that the ILMs are oriented with the underlying tablets and connected with the latter via a superlattice region. The finding advances our current knowledge of nacre biomineralization and may help to design novel nacre-like materials.
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1499
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Cheng Q, Jiang L. Mimicking Nacre by Ice Templating. Angew Chem Int Ed Engl 2016; 56:934-935. [DOI: 10.1002/anie.201610176] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Qunfeng Cheng
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment; Beihang University; Xueyue Road No. 37, Haidian District Beijing 100191 China
| | - Lei Jiang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment; Beihang University; Xueyue Road No. 37, Haidian District Beijing 100191 China
- Laboratory of Bio-inspired Smart Interface Science, Technical Institute of Physics and Chemistry; Chinese Academy of Science; Zhongguancun East Road No.29, Haidian District Beijing 100190 China
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Affiliation(s)
- Qunfeng Cheng
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment; Beihang University; Xueyue Road No. 37, Haidian District Beijing 100191 China
| | - Lei Jiang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment; Beihang University; Xueyue Road No. 37, Haidian District Beijing 100191 China
- Laboratory of Bio-inspired Smart Interface Science, Technical Institute of Physics and Chemistry; Chinese Academy of Science; Zhongguancun East Road No.29, Haidian District Beijing 100190 China
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