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Le Ferrand H, Arrieta AF. Magnetically driven in-plane modulation of the 3D orientation of vertical ferromagnetic flakes. SOFT MATTER 2022; 18:1054-1063. [PMID: 35022646 DOI: 10.1039/d1sm01423d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
External magnetic fields are known to attract and orient magnetically responsive colloidal particles. In the case of 2D microplatelets, rotating magnetic fields are typically used to orient them parallel to each other in a brick-and-mortar fashion. Thanks to this microstructure, the resulting composites achieve enhanced mechanical and functional properties. However, parts with complex geometries require their microstructure to be specifically tuned and controlled locally in 3D. Although the tunability of the microstructure along the vertical direction has already been demonstrated using magnetic orientation combined with sequential or continuous casting, controlling the particle orientation in the horizontal plane in a fast and effective fashion remains challenging. Here, we propose to use rotating magnetic arrays to control the in-plane orientation of ferromagnetic nickel flakes distributed in curable polymeric matrices. We experimentally studied the orientation of the flakes in response to magnets rotating at various frequencies and precessing angles. Then, we used COMSOL to model the magnetic field from rotating magnetic arrays and predicted the resulting in-plane orientations. To validate the approach, we created composites with locally oriented flakes. This work could initiate reverse-engineering methods to design the microstructure in composite materials with intricate geometrical shapes for structural or functional applications.
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Affiliation(s)
- Hortense Le Ferrand
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
| | - Andres F Arrieta
- School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA
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2
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Tough metal-ceramic composites with multifunctional nacre-like architecture. Sci Rep 2021; 11:1621. [PMID: 33452425 PMCID: PMC7810751 DOI: 10.1038/s41598-021-81068-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 12/16/2020] [Indexed: 11/09/2022] Open
Abstract
The brick-and-mortar architecture of biological nacre has inspired the development of synthetic composites with enhanced fracture toughness and multiple functionalities. While the use of metals as the “mortar” phase is an attractive option to maximize fracture toughness of bulk composites, non-mechanical functionalities potentially enabled by the presence of a metal in the structure remain relatively limited and unexplored. Using iron as the mortar phase, we develop and investigate nacre-like composites with high fracture toughness and stiffness combined with unique magnetic, electrical and thermal functionalities. Such metal-ceramic composites are prepared through the sol–gel deposition of iron-based coatings on alumina platelets and the magnetically-driven assembly of the pre-coated platelets into nacre-like architectures, followed by pressure-assisted densification at 1450 °C. With the help of state-of-the-art characterization techniques, we show that this processing route leads to lightweight inorganic structures that display outstanding fracture resistance, show noticeable magnetization and are amenable to fast induction heating. Materials with this set of properties might find use in transport, aerospace and robotic applications that require weight minimization combined with magnetic, electrical or thermal functionalities.
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3
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Le Ferrand H. Magnetic slip casting for dense and textured ceramics: A review of current achievements and issues. Ann Ital Chir 2021. [DOI: 10.1016/j.jeurceramsoc.2020.08.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Cheung CCL, Monaco I, Kostevšek N, Franchini MC, Al-Jamal WT. Nanoprecipitation preparation of low temperature-sensitive magnetoliposomes. Colloids Surf B Biointerfaces 2020; 198:111453. [PMID: 33234412 DOI: 10.1016/j.colsurfb.2020.111453] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 01/05/2023]
Abstract
Lysolipid-containing thermosensitive liposomes (LTSL) have gained attention for triggered release of chemotherapeutics. Superparamagnetic iron oxide nanoparticles (SPION) offers multimodal imaging and hyperthermia therapy opportunities as a promising theranostic agent. Combining LTSL with SPION may further enhance their performance and functionality of LTSL. However, a major challenge in clinical translation of nanomedicine is the poor scalability and complexity of their preparation process. Exploiting the nature of self-assembly, nanoprecipitation is a simple and scalable technique for preparing liposomes. Herein, we developed a novel SPION-incorporated lysolipid-containing thermosensitive liposome (mLTSL10) formulation using nanoprecipitation. The formulation and processing parameters were carefully designed to ensure high reproducibility and stability of mLTSL10. The effect of solvent, aqueous-to-organic volume ratio, SPION concentration on the mLTSL10 size and dispersity was investigated. mLTSL10 were successfully prepared with a small size (∼100 nm), phase transition temperature at around 42 °C, and high doxorubicin encapsulation efficiency. Indifferent from blank LTSL, we demonstrated that mLTSL10 combining the functionality of both LTSL and SPION can be successfully prepared using a scalable nanoprecipitation approach.
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Affiliation(s)
- Calvin C L Cheung
- School of Pharmacy, Queen's University Belfast, Belfast, United Kingdom
| | - Ilaria Monaco
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Italy
| | - Nina Kostevšek
- Department for Nanostructured Materials, Jožef Stefan Institute, Ljubljana, Slovenia
| | | | - Wafa T Al-Jamal
- School of Pharmacy, Queen's University Belfast, Belfast, United Kingdom.
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5
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Kostevšek N, Cheung CCL, Serša I, Kreft ME, Monaco I, Comes Franchini M, Vidmar J, Al-Jamal WT. Magneto-Liposomes as MRI Contrast Agents: A Systematic Study of Different Liposomal Formulations. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E889. [PMID: 32384645 PMCID: PMC7279489 DOI: 10.3390/nano10050889] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 04/27/2020] [Accepted: 04/30/2020] [Indexed: 12/11/2022]
Abstract
The majority of the clinically approved iron oxide nanoparticles (IO NPs) used as contrast agents for magnetic resonance imaging (MRI) have been withdrawn from the market either due to safety concerns or lack of profits. To address this challenge, liposomes have been used to prepare IO-based T2 contrast agents. We studied the influence of different phospholipids on the relaxivity (r2) values of magneto-liposomes (MLs) containing magnetic NPs in the bilayer, where a strong correlation between the bilayer fluidity and r2 is clearly shown. Embedding 5-nm IO NPs in the lipid bilayer leads to a significant improvement in their relaxivity, where r2 values range from 153 ± 5 s-1 mM-1 for DPPC/cholesterol/DSPE-PEG (96/50/4) up to 673 ± 12 s-1 mM-1 for DOPC/DSPE-PEG (96/4), compared to "free" IO NPs with an r2 value of 16 s-1 mM-1, measured at 9.4 T MRI scanner. In vitro MRI measurements, together with the ICP-MS analysis, revealed MLs as highly selective contrast agents that were preferentially taken up by cancerous T24 cells, which led to an improvement in the contrast and an easier distinction between the healthy and the cancerous cells. A careful selection of the lipid bilayer to prepare MLs could offer efficient MRI contrast agents, even at very low IO NP concentrations.
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Affiliation(s)
- Nina Kostevšek
- Department for Nanostructured Materials, Jožef Stefan Institute, 1000 Ljubljana, Slovenia
| | | | - Igor Serša
- Condensed Matter Physics Department, Jožef Stefan Institute, 1000 Ljubljana, Slovenia;
| | - Mateja Erdani Kreft
- Faculty of Medicine, Institute of Cell Biology, University of Ljubljana, 1000 Ljubljana, Slovenia;
| | - Ilaria Monaco
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, 40136 Bologna, Italy; (I.M.); (M.C.F.)
| | - Mauro Comes Franchini
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, 40136 Bologna, Italy; (I.M.); (M.C.F.)
| | - Janja Vidmar
- Department for Environmental Sciences, Jožef Stefan Institute, 1000 Ljubljana, Slovenia;
| | - Wafa T. Al-Jamal
- School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, UK;
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6
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Rey M, Uttinger MJ, Peukert W, Walter J, Vogel N. Probing particle heteroaggregation using analytical centrifugation. SOFT MATTER 2020; 16:3407-3415. [PMID: 32154548 DOI: 10.1039/d0sm00026d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The controlled aggregation of colloidal particles is not only a widespread natural phenomenon but also serves as a tool to design complex building blocks with tailored shape and functionalities. However, the quantitative characterization of such heteroaggregation processes remains challenging. Here, we demonstrate the use of analytical centrifugation to characterize the heteroaggregation of silica particles and soft microgels bearing similar surface charges. We investigate the attachment as well as the stability of the formed heteroaggregates as a function of particle to microgel surface ratio, microgel size and the influence of temperature. The attachment of microgels onto the colloidal particles induces a change in the sedimentation coefficient, which is used to quantitatively identify the number of attached microgels. We corroborate the shift in sedimentation coefficient by computer simulations of the frictional properties of heteroaggregates via a modified Brownian dynamic algorithm. The comparison between theoretical investigations and experiments suggest that the microgels deform and flatten upon attachment.
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Affiliation(s)
- Marcel Rey
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstrasse 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstrasse 9a, 91058 Erlangen, Germany
| | - Maximilian J Uttinger
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstrasse 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstrasse 9a, 91058 Erlangen, Germany
| | - Wolfgang Peukert
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstrasse 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstrasse 9a, 91058 Erlangen, Germany
| | - Johannes Walter
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstrasse 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstrasse 9a, 91058 Erlangen, Germany
| | - Nicolas Vogel
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstrasse 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstrasse 9a, 91058 Erlangen, Germany
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Yang Y, Song X, Li X, Chen Z, Zhou C, Zhou Q, Chen Y. Recent Progress in Biomimetic Additive Manufacturing Technology: From Materials to Functional Structures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1706539. [PMID: 29920790 DOI: 10.1002/adma.201706539] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 01/25/2018] [Indexed: 05/11/2023]
Abstract
Nature has developed high-performance materials and structures over millions of years of evolution and provides valuable sources of inspiration for the design of next-generation structural materials, given the variety of excellent mechanical, hydrodynamic, optical, and electrical properties. Biomimicry, by learning from nature's concepts and design principles, is driving a paradigm shift in modern materials science and technology. However, the complicated structural architectures in nature far exceed the capability of traditional design and fabrication technologies, which hinders the progress of biomimetic study and its usage in engineering systems. Additive manufacturing (three-dimensional (3D) printing) has created new opportunities for manipulating and mimicking the intrinsically multiscale, multimaterial, and multifunctional structures in nature. Here, an overview of recent developments in 3D printing of biomimetic reinforced mechanics, shape changing, and hydrodynamic structures, as well as optical and electrical devices is provided. The inspirations are from various creatures such as nacre, lobster claw, pine cone, flowers, octopus, butterfly wing, fly eye, etc., and various 3D-printing technologies are discussed. Future opportunities for the development of biomimetic 3D-printing technology to fabricate next-generation functional materials and structures in mechanical, electrical, optical, and biomedical engineering are also outlined.
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Affiliation(s)
- Yang Yang
- Epstein Department of Industrial and Systems Engineering, Viterbi School of Engineering, University of Southern California, 3715 McClintock Ave, Los Angeles, CA, 90089-0192, USA
| | - Xuan Song
- Department of Mechanical and Industrial Engineering, University of Iowa, Iowa City, IA, 52242, USA
- Center for Computer-Aided Design, University of Iowa, Iowa City, IA, 52242, USA
| | - Xiangjia Li
- Epstein Department of Industrial and Systems Engineering, Viterbi School of Engineering, University of Southern California, 3715 McClintock Ave, Los Angeles, CA, 90089-0192, USA
| | - Zeyu Chen
- Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, 3650 McClintock Ave, Los Angeles, CA, 90089, USA
| | - Chi Zhou
- Department of Industrial and Systems Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA
| | - Qifa Zhou
- Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, 3650 McClintock Ave, Los Angeles, CA, 90089, USA
| | - Yong Chen
- Epstein Department of Industrial and Systems Engineering, Viterbi School of Engineering, University of Southern California, 3715 McClintock Ave, Los Angeles, CA, 90089-0192, USA
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Kandibanda SR, Gundeboina N, Das S, Sunkara VM. Synthesis, characterisation, cellular uptake and cytotoxicity of functionalised magnetic ruthenium (II) polypyridine complex core-shell nanocomposite. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 178:270-276. [DOI: 10.1016/j.jphotobiol.2017.10.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/17/2017] [Accepted: 10/30/2017] [Indexed: 11/16/2022]
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Abstract
Additive manufacturing (AM) technologies offer an attractive pathway towards the fabrication of functional materials featuring complex heterogeneous architectures inspired by biological systems. In this paper, recent research on the use of AM approaches to program the local chemical composition, structure and properties of biologically-inspired materials is reviewed. A variety of structural motifs found in biological composites have been successfully emulated in synthetic systems using inkjet-based, direct-writing, stereolithography and slip casting technologies. The replication in synthetic systems of design principles underlying such structural motifs has enabled the fabrication of lightweight cellular materials, strong and tough composites, soft robots and autonomously shaping structures with unprecedented properties and functionalities. Pushing the current limits of AM technologies in future research should bring us closer to the manufacturing capabilities of living organisms, opening the way for the digital fabrication of advanced materials with superior performance, lower environmental impact and new functionalities.
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Affiliation(s)
- André R Studart
- Complex Materials, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland.
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