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Vasantha VA, Hua NQ, Rusli W, Hadia NJ, Stubbs LP. Unique Oil-in-Brine Pickering Emulsion Using Responsive Antipolyelectrolyte Functionalized Latex: A Versatile Emulsion Stabilizer. ACS APPLIED MATERIALS & INTERFACES 2020; 12:23443-23452. [PMID: 32348674 DOI: 10.1021/acsami.0c03743] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A simple and straightforward approach to synthesize oil-in-water (O/W) emulsions under high salinity and temperature using zwitterion-functionalized latexes are presented in this work. First, well-defined functionalized latexes were synthesized by emulsifier-free emulsion copolymerization in the presence of precursor sulfobetaine comonomer using brine as a continuous phase. The surface-functionalized latex particles were then characterized by DLS, SEM, TEM, XPS, and TGA. The functionalized latex exhibited antipolyelectrolyte behavior in high salinity brine and at high temperatures. The effects of salinity, temperature, and pH on the long-term stability of the particles were investigated. Further, to evaluate the potential in high salinity brine and high temperature, the saltphilic functionalized latexes were utilized to stabilize the oil/brine (O/W) interface without any other additives. The latex enabled the formation of a stable Pickering emulsion system with low solid content (<0.02% w/w) in the presence of 50% v/v n-decane. The functionalized latexes were self-assembled at the O/W interface as a spherical colloidosome in high salinity brine through hydrophobic interactions and irreversible adsorption. The supraparticles were imaged with SEM, providing an insight that the exterior of the emulsion droplets is stabilized by the saltphilic latex particles, forming a protective layer at the oil-water interface through electrostatic repulsion. The antipolyelectrolyte latex can be utilized as a novel emulsion stabilizer, which can provide a versatile alternative for applications in a complex environment such as high salinity, temperature, and low or high pH.
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Affiliation(s)
- Vivek Arjunan Vasantha
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833
| | - Ng Qi Hua
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833
| | - Wendy Rusli
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833
| | - Nanji J Hadia
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833
| | - Ludger Paul Stubbs
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, Singapore 627833
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Lim H, Jo M, Ban C, Choi YJ. Interfacial and colloidal characterization of oil-in-water emulsions stabilized by interface-tunable solid lipid nanoparticles. Food Chem 2020; 306:125619. [DOI: 10.1016/j.foodchem.2019.125619] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 09/25/2019] [Accepted: 09/29/2019] [Indexed: 11/26/2022]
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Zhang Y, Abidi W, Berlin JM. Colloidal Capsules Assembled from Gold Nanoparticles Using Small-Molecule Hydrophobic Cross-linkers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:17037-17045. [PMID: 31804093 PMCID: PMC8837261 DOI: 10.1021/acs.langmuir.9b01903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Colloidal capsules (or colloidosomes) have been studied for various applications such as therapeutic agent encapsulation, photothermal therapy, imaging, and energy storage. Emulsion-based synthesis is the most common approach for preparing colloidal capsules as it is relatively straightforward and scalable. However, while the initial formation requires only introducing the colloidal subunits into an emulsion and letting them assemble at the interface, a second step is required in order to prepare stable, covalently linked colloidal capsules, and preparing submicron colloidal capsules is quite challenging. Here, we describe a simple and quick one-step method to synthesize covalently linked, stable nanoscale colloidal capsules consisting of gold nanoparticles (NPs) (AuNP) and thiol-containing cross-linkers. Gold nanoparticle capsules (AuNCs) were formed by coating emulsion droplets containing thiol-containing cross-linkers with citrate-stabilized AuNPs. The physicochemical properties of the colloidal capsules can be tailored by changing the building blocks. In order to demonstrate this, colloidal capsules were assembled from AuNPs ranging from 5 to 20 nm in size. The use of the larger 20 nm starting particles resulted in AuNCs with a sufficiently pronounced red shift for λmax to be suitable for biological photothermal applications, where use of a near-infrared laser is strongly preferred. The AuNCs were found to be biocompatible and stable in cell culture conditions and to provide moderate heating. This demonstrates the modularity of the synthesis and the potential advantages of a one-step synthesis to prepare nanoscale gold colloidal capsules.
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Affiliation(s)
- Yijia Zhang
- Department of Molecular Medicine, Irell and Manella Graduate School of Biological Sciences, Beckman Research Institute , City of Hope National Medical Center , Duarte , California 91010 , United States
| | - Wafa Abidi
- Department of Molecular Medicine, Irell and Manella Graduate School of Biological Sciences, Beckman Research Institute , City of Hope National Medical Center , Duarte , California 91010 , United States
| | - Jacob M Berlin
- Department of Molecular Medicine, Irell and Manella Graduate School of Biological Sciences, Beckman Research Institute , City of Hope National Medical Center , Duarte , California 91010 , United States
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Riley L, Schirmer L, Segura T. Granular hydrogels: emergent properties of jammed hydrogel microparticles and their applications in tissue repair and regeneration. Curr Opin Biotechnol 2019; 60:1-8. [PMID: 30481603 PMCID: PMC6534490 DOI: 10.1016/j.copbio.2018.11.001] [Citation(s) in RCA: 118] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/03/2018] [Accepted: 11/05/2018] [Indexed: 01/24/2023]
Abstract
Granular hydrogels are emerging as a versatile and effective platform for tissue engineered constructs in regenerative medicine. The hydrogel microparticles (HMPs) that compose these materials exhibit particle jamming above a minimum packing fraction, which results in a bulk, yet dynamic, granular hydrogel scaffold. These injectable, microporous scaffolds possess self-assembling, shear-thinning, and self-healing properties. Recently, they have been utilized as cell cultures platforms and extracellular matrix mimics with remarkable success in promoting cellular infiltration and subsequent tissue remodeling in vivo. Furthermore, the modular nature of granular hydrogels accommodates heterogeneous HMP assembly, where varying HMPs have been fabricated to target distinct biological processes or deliver unique cargo. Such multifunctional materials offer enormous potential for capturing the structural and biofunctional complexity observed in native human tissue.
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Affiliation(s)
- Lindsay Riley
- Department of Biomedical Engineering, Duke University, United States
| | - Lucas Schirmer
- Department of Biomedical Engineering, Duke University, United States
| | - Tatiana Segura
- Department of Biomedical Engineering, Duke University, United States; Department of Dermatology, Duke University, United States; Department of Neurology, Duke University, United States.
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56
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Pickering emulsion stabilization by using amphiphilic cellulose nanofibrils prepared by aqueous counter collision. Carbohydr Polym 2019; 226:115293. [DOI: 10.1016/j.carbpol.2019.115293] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 08/20/2019] [Accepted: 09/03/2019] [Indexed: 01/19/2023]
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Shi B, Zhang H, Liu Y, Wang J, Zhou P, Cao M, Wang G. Development of ICAR ATRP–Based Polymerization‐Induced Self‐Assembly and Its Application in the Preparation of Organic–Inorganic Nanoparticles. Macromol Rapid Commun 2019; 40:e1900547. [DOI: 10.1002/marc.201900547] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 11/04/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Boyang Shi
- State Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Polymers and Polymer Composite MaterialsDepartment of Macromolecular ScienceFudan University Shanghai 200433 China
| | - Hao Zhang
- State Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Polymers and Polymer Composite MaterialsDepartment of Macromolecular ScienceFudan University Shanghai 200433 China
| | - Yi Liu
- State Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Polymers and Polymer Composite MaterialsDepartment of Macromolecular ScienceFudan University Shanghai 200433 China
| | - Jian Wang
- State Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Polymers and Polymer Composite MaterialsDepartment of Macromolecular ScienceFudan University Shanghai 200433 China
| | - Peng Zhou
- State Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Polymers and Polymer Composite MaterialsDepartment of Macromolecular ScienceFudan University Shanghai 200433 China
| | - Mengya Cao
- State Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Polymers and Polymer Composite MaterialsDepartment of Macromolecular ScienceFudan University Shanghai 200433 China
| | - Guowei Wang
- State Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Polymers and Polymer Composite MaterialsDepartment of Macromolecular ScienceFudan University Shanghai 200433 China
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Avossa J, Esteves ACC. Influence of experimental parameters on the formation and stability of silica-wax colloidosomes. J Colloid Interface Sci 2019; 561:244-256. [PMID: 31830736 DOI: 10.1016/j.jcis.2019.11.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 10/31/2019] [Accepted: 11/02/2019] [Indexed: 11/15/2022]
Abstract
HYPOTHESIS Silica-wax colloidosomes find application in various fields, for instance through their use as microencapsules for triggered release of chemical components or as precursors for the production of Janus particles. The characteristics of these colloidosomes are highly dependent on the particles/water-oil system composition and experimental parameters. EXPERIMENTS Different colloidosomes were prepared using silica particles (D¯ ≈ 295 nm) and a positively charged surfactant (cetyltrimethylammonium bromide, CTAB) as co-stabilizers of a wax in water. The CTAB concentration, type of stirring and wax addition procedure were systematically varied. The silica particles and colloidosomes formed were analysed by Scanning Electron Microscopy (SEM) and Dynamic Light Scattering (DLS). The final percentage of the silica particles embedded on the wax colloidosomes (embedding yield) was estimated by a gravimetric method and the formation of monolayer or multilayer/clusters of silica particles at the wax surface was inspected with SEM. FINDINGS The CTAB concentration and the wax addition procedure play a major role in obtaining an embedding yield close to 100% and a monolayer coverage of the colloidosomes surface. The results indicate the existence of a mechanism consisting of a dynamic redistribution of the surfactant between the interfaces present in the emulsion. The practical and theoretical insights provided can be used towards an efficient production and scale-up of silica-wax colloidosomes.
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Affiliation(s)
- J Avossa
- Institute of Atmospheric Pollution Research, National Research Council, Rome, Italy; Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Naples, Italy.
| | - A C C Esteves
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, the Netherlands.
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59
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Qu F, Meng T, Dong Y, Sun H, Tang Q, Liu T, Wang Y. Aqueous Two-Phase Droplet-Templated Colloidosomes Composed of Self-Formed Particles via Spatial Confined Biomineralization. ACS APPLIED MATERIALS & INTERFACES 2019; 11:35613-35621. [PMID: 31505927 DOI: 10.1021/acsami.9b15086] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A facile and green approach is developed for fabricating colloidosomes with well-controlled size and structure from the microfluidic-generated aqueous two-phase system (ATPS) emulsion droplet. Unlike other methods that rely on self-assembly of externally added colloidal particles at the emulsion interface, urease-mediated biomineralization induced by "drainage" is introduced to form CaCO3 particles at the alginate emulsion interface for preparing Ca-alg@CaCO3 colloidosomes. Two types of bioactive molecules (bovine serum albumin and catalase) can be encapsulated with high efficiency (>85%) because of the partitioning effect of the ATPS and high viscosity of alginate solution. The encapsulated bioactive molecules can be controllably released by regulating the compactness of colloidosomes. Moreover, after being freeze-dried or dried at 37 °C, the activity of catalase in colloidosomes is obviously higher than that in alginate hydrogels, which confirms that the Ca-alg@CaCO3 structure has strong protection for inclusions. We believe that the biocompatible and controllable Ca-alg@CaCO3 colloidosomes possess great potential applications in bioencapsulation for foods, daily chemicals, and synthetic protocell formation.
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Affiliation(s)
- Fengmei Qu
- School of Life Sciences and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , P. R. China
| | - Tao Meng
- School of Life Sciences and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , P. R. China
| | - Yuman Dong
- School of Life Sciences and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , P. R. China
| | - Hejia Sun
- School of Life Sciences and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , P. R. China
| | - Qiming Tang
- School of Life Sciences and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , P. R. China
| | - Tiantian Liu
- School of Life Sciences and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , P. R. China
| | - Yaolei Wang
- School of Life Sciences and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031 , P. R. China
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60
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Grzegorzewski F, Benhaim A, Itzhaik Alkotzer Y, Zelinger E, Yaakov N, Mechrez G. In situ Fabrication of Multi-Walled Carbon Nanotubes/Silica Hybrid Colloidosomes by Pickering Emulsion Templating Using Trialkoxysilanes of Opposite Polarity. Polymers (Basel) 2019; 11:E1480. [PMID: 31510082 PMCID: PMC6780190 DOI: 10.3390/polym11091480] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 09/03/2019] [Accepted: 09/07/2019] [Indexed: 11/16/2022] Open
Abstract
A simple and effective way to prepare multi-walled carbon nanotubes (MWNT)//silica hybrid microcapsules (colloidosomes) is presented. These microcapsules have been generated by emulsion templating in a biphasic oil-in-water (o/w) system. Two trialkoxysilanes of complementary polarity, (3-aminopropyl)triethoxysilane (APTES) and dodecyltriethoxysilane (DTES), were used to chemically immobilize the silica nanoparticles at the o/w interface and stabilize the as-generated Pickering emulsions. The effects of varying the o/w ratio and the concentration of the added solids on the type of emulsion formed, the oil droplet size, as well as the emulsion stability have been investigated. The emulsion phase fraction was dependent on the silica content while the droplet size increased with increasing oil volume percentage. A solid shell emerged around the oil droplets from copolymerization between silane monomers. The thickness of the resulting shells was several hundreds of nm. Although MWNTs and silica nanoparticles both were co-assembled at the o/w interface, silica has shown to be the sole stabilizer, with APTES being crucial for the formation of the shell structure. Drop-casting of the emulsion and air-drying led to hierarchical open porous MWNT-silica nanocomposites. These new structures are promising as electrically conductive thin films for variety of applications, such as electro-optics, encapsulation, or chemical sensing.
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Affiliation(s)
- Franziska Grzegorzewski
- Department of Food Quality & Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon LeZion 7505101, Israel; (F.G.); (A.B.); (Y.I.A.); (N.Y.)
| | - Avital Benhaim
- Department of Food Quality & Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon LeZion 7505101, Israel; (F.G.); (A.B.); (Y.I.A.); (N.Y.)
| | - Yafit Itzhaik Alkotzer
- Department of Food Quality & Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon LeZion 7505101, Israel; (F.G.); (A.B.); (Y.I.A.); (N.Y.)
| | - Einat Zelinger
- The Interdepartmental Equipment Unit, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, POB 12, Rehovot 7610001, Israel;
| | - Noga Yaakov
- Department of Food Quality & Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon LeZion 7505101, Israel; (F.G.); (A.B.); (Y.I.A.); (N.Y.)
| | - Guy Mechrez
- Department of Food Quality & Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon LeZion 7505101, Israel; (F.G.); (A.B.); (Y.I.A.); (N.Y.)
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61
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Xia Y, Na X, Wu J, Ma G. The Horizon of the Emulsion Particulate Strategy: Engineering Hollow Particles for Biomedical Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1801159. [PMID: 30260511 DOI: 10.1002/adma.201801159] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 07/06/2018] [Indexed: 05/13/2023]
Abstract
With their hierarchical structures and the substantial surface areas, hollow particles have gained immense research interest in biomedical applications. For scalable fabrications, emulsion-based approaches have emerged as facile and versatile strategies. Here, the recent achievements in this field are unfolded via an "emulsion particulate strategy," which addresses the inherent relationship between the process control and the bioactive structures. As such, the interior architectures are manipulated by harnessing the intermediate state during the emulsion revolution (intrinsic strategy), whereas the external structures are dictated by tailoring the building blocks and solidification procedures of the Pickering emulsion (extrinsic strategy). Through integration of the intrinsic and extrinsic emulsion particulate strategy, multifunctional hollow particles demonstrate marked momentum for label-free multiplex detections, stimuli-responsive therapies, and stem cell therapies.
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Affiliation(s)
- Yufei Xia
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiangming Na
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jie Wu
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- PLA Key Laboratory of Biopharmaceutical Production & Formulation Engineering Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Guanghui Ma
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- PLA Key Laboratory of Biopharmaceutical Production & Formulation Engineering Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing, 211816, P. R. China
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62
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Xue Z, Wang P, Peng A, Wang T. Architectural Design of Self-Assembled Hollow Superstructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1801441. [PMID: 30256464 DOI: 10.1002/adma.201801441] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 07/01/2018] [Indexed: 06/08/2023]
Abstract
Colloidal nanoparticle assemblies are widely designed and fabricated via various building blocks to enhance their intrinsic properties and potential applications. Self-assembled hollow superstructures have been a focal point in nanotechnology for several decades and are likely to remain so for the foreseeable future. The novel properties of self-assembled hollow superstructures stem from their effective spatial utilization. As such, a comprehensive appreciation of the interactive forces at play among individual building blocks is a prerequisite for designing and managing the self-assembly process, toward the fabrication of optimal hollow nanoproducts. Herein, the emerging approaches to the fabrication of self-assembled hollow superstructures, including hard-templated, soft-templated, self-templated, and template-free methods, are classified and discussed. The corresponding reinforcement mechanisms, such as strong ligand interaction strategies and extra-capping strategies, are discussed in detail. Finally, possible future directions for the construction of multifunctional hollow superstructures with highly efficient catalytic reaction systems and an integration platform for bioapplications are discussed.
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Affiliation(s)
- Zhenjie Xue
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Peilong Wang
- Institute of Quality Standards & Testing Technology for Agriculture Products, China Agricultural Academy of Science, Beijing, 100081, P. R. China
| | - Aidong Peng
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Tie Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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63
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64
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Affiliation(s)
- Qian Sun
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology , Beijing , PR China.,Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology , Beijing , PR China
| | - Jian-Feng Chen
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology , Beijing , PR China.,Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology , Beijing , PR China
| | - Alexander F Routh
- Department of Chemical Engineering and Biotechnology, BP Institute, University of Cambridge, Madingley Rise , Cambridge , UK
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65
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Douliez JP, Perro A, Béven L. Stabilization of All-in-Water Emulsions To Form Capsules as Artificial Cells. Chembiochem 2019; 20:2546-2552. [PMID: 31087750 DOI: 10.1002/cbic.201900196] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Indexed: 12/21/2022]
Abstract
Building artificial cells through a bottom-up approach is a remarkable challenge that would be of interest for our understanding of the origin of life, research into the minimal conditions required for life, the formation of bioreactors, and for industrial applications. To date, capsules such as liposomes, including polymersomes, are widely used, but the low membrane permeability and method to encapsulate biological materials within these structures hamper their use. By contrast, all-in-water emulsion droplets, including coacervate droplets, are promising compartments, mainly because they can spontaneously sequester chemicals. However, they lack a membrane necessary to control exchange between the inner and outer media. Moreover, droplets tend to coalesce with time, yielding macroscopic phase separation that is deleterious for any use as artificial cells. Recent advances, which are reviewed herein, have shown that such droplets can be stabilized by using lipid membranes, liposomes, polymers, proteins, and particles, and thus, preventing coalescence. Finally, different strategies that could allow the future development of artificial cells from these stabilized all-in-water emulsion droplets are discussed.
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Affiliation(s)
- Jean-Paul Douliez
- UMR 1332, Biologie du Fruit et Pathologie, INRA, Centre de Bordeaux, Université de Bordeaux, Équipe Mollicute, 71, rue E. Bourlaux, 33883, Villenave d'Ornon, France
| | - Adeline Perro
- Université de Bordeaux, INP Bordeaux, ISM, UMR 5255, site ENSCBP, 16 av. Pey-Berland, 33607, Pessac, France
| | - Laure Béven
- UMR 1332, Biologie du Fruit et Pathologie, INRA, Centre de Bordeaux, Université de Bordeaux, Équipe Mollicute, 71, rue E. Bourlaux, 33883, Villenave d'Ornon, France
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66
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Carrasco-Fadanelli V, Castillo R. Measurement of the force between uncharged colloidal particles trapped at a flat air/water interface. SOFT MATTER 2019; 15:5815-5818. [PMID: 31305848 DOI: 10.1039/c9sm01051c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The radial attraction between microspheres straddling at the air/water interface (Bond number ≪1), whose origin is the irregular shape of the contact line and its concomitant distortion of the water surface, is measured using two light beams of a time-sharing optical tweezer. The colloidal particles used to make the measurements are microspheres made of hydrophobically covered silica to reduce the electrostatic interactions to a minimum. The measured radial force goes as a quadrupolar power law, r-n, with n = 5.02 ± 0.18 and n = 5.04 ± 0.18 for particles of 3 μm and 5 μm, respectively. In both cases, the electrostatic interaction is negligible.
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67
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68
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Zhang Y, Chen K, Cao L, Li K, Wang Q, Fu E, Guo X. Stabilization of Pickering Emulsions by Hairy Nanoparticles Bearing Polyanions. Polymers (Basel) 2019; 11:E816. [PMID: 31067697 PMCID: PMC6571738 DOI: 10.3390/polym11050816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 04/13/2019] [Accepted: 04/28/2019] [Indexed: 11/23/2022] Open
Abstract
Pickering emulsions are increasingly applied in drug delivery, oil-water separation, composite materials preparation, and other fields. However, systematic studies on the stabilization of Pickering emulsions to satisfy the growing application demands in multiple fields with long-term conservation are rare. Compared to conventional solid nanoparticles, polyanion-modified hairy nanoparticles are more stable in practical environments and are investigated in this study. Poly (sodium p-styrenesulfonate) was grafted to a polystyrene (PS) core via a photoemulsion polymerization. A hairy nanoparticle bearing polyanions called poly (sodium p-styrenesulfonate) brush (PS@PSS) was synthesized. The size and uniformity of the Pickering emulsions stabilized by PS@PSS were investigated via a polarizing microscope. The stability of Pickering emulsions were optimized by adjusting critical factors like ultrasonic power and time, standing time, oil phases, salt concentration, and water:oil ratio. Results indicated that the Pickering emulsions could be stabilized by PS@PSS nanoparticles, which showed remarkable and adjustable partial wetting properties. It was found that the optimized conditions were ultrasonic power of 150 W, ultrasonic time of 3 min, salt concentration of 0.1 mM, oil phase of hexadecane, and water:oil ratio of 1:1. The formation and stability of Pickering emulsion are closely related to the hairy poly (sodium p-styrenesulfonate) brush layer on the nanoparticle surface.
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Affiliation(s)
- Ying Zhang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Kaimin Chen
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
| | - Lan Cao
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Kai Li
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
| | - Qiaoling Wang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
| | - Enyu Fu
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
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69
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Feng Y, Lee Y. Microfluidic fabrication of wrinkled protein microcapsules and their nanomechanical properties affected by protein secondary structure. J FOOD ENG 2019. [DOI: 10.1016/j.jfoodeng.2018.10.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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70
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Mihali V, Honciuc A. Evolution of Self-Organized Microcapsules with Variable Conductivities from Self-Assembled Nanoparticles at Interfaces. ACS NANO 2019; 13:3483-3491. [PMID: 30862162 DOI: 10.1021/acsnano.8b09625] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Self-organization dramatically affects the surface properties of materials on a macroscopic scale, such as wettability and adhesion. Fundamentally, it is equally interesting when self-organization at the nanoscale affects the bulk properties and thus provides a means to engineer the optoelectronic properties of the materials on larger scales. In this work, we report the evolution of conductive self-organized polymer microcapsules from a monomer emulsion droplet stabilized by a monolayer of conductive Janus nanoparticles (JNPs) via a mechanism resembling morphogenesis. The wall of the resulting conductive microcapsule has a honeycomb-like structure with highly oriented JNPs occupying each hollow cell. The JNPs consist of an electrically conductive lobe and an insulating lobe; because of their orientation and presence in the honeycomb, the conductivity of the microcapsule is greatly enhanced as compared to that of each of the constituting materials. This method can be universally applied to induce self-organization in conductive polymers forming by oxidative addition.
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Affiliation(s)
- Voichita Mihali
- Institute of Chemistry and Biotechnology , Zurich University of Applied Sciences , Einsiedlerstrasse 31 , 8820 Waedenswil , Switzerland
| | - Andrei Honciuc
- Institute of Chemistry and Biotechnology , Zurich University of Applied Sciences , Einsiedlerstrasse 31 , 8820 Waedenswil , Switzerland
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71
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Liposomes for delivery of antioxidants in cosmeceuticals: Challenges and development strategies. J Control Release 2019; 300:114-140. [PMID: 30853528 DOI: 10.1016/j.jconrel.2019.03.003] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/05/2019] [Accepted: 03/05/2019] [Indexed: 12/24/2022]
Abstract
Antioxidants (AOs) play a crucial role in the protection and maintenance of health and are also integral ingredients in beauty products. Unfortunately, most of them are sensitive due to their instability and insolubility. The use of liposomes to protect AOs and expand their applicability to cosmeceuticals, thereby, is one of the most effective solutions. Notwithstanding their offered advantages for the delivery of AOs, liposomes, in their production and application, present many challenges. Here, we provide a critical review of the major problems complicating the development of liposomes for AO delivery. Along with issues related to preparation techniques and encapsulation efficiency, the loss of protective function and inefficiency of skin permeability are the main disadvantages of liposomes. Corresponding development strategies for resolving these problems, with their respective advantages and drawbacks, are introduced, discussed in some depth, and summarized in these pages as well. Advanced liposomes have a vital role to play in the development and delivery of AOs in practical cosmeceutical product applications.
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72
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Lošdorfer Božič A, Čopar S. Spherical structure factor and classification of hyperuniformity on the sphere. Phys Rev E 2019; 99:032601. [PMID: 30999521 DOI: 10.1103/physreve.99.032601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Indexed: 06/09/2023]
Abstract
Understanding how particles are arranged on the surface of a sphere is not only central to numerous physical, biological, soft matter, and materials systems but also finds applications in computational problems, approximation theory, and analysis of geophysical and meteorological measurements. Objects that lie on a sphere experience constraints that are not present in Euclidean (flat) space and that influence both how the particles can be arranged as well as their statistical properties. These constraints, coupled with the curved geometry, require a careful extension of quantities used for the analysis of particle distributions in Euclidean space to distributions confined to the surface of a sphere. Here, we introduce a framework designed to analyze and classify structural order and disorder in particle distributions constrained to the sphere. The classification is based on the concept of hyperuniformity, which was first introduced 15 years ago and since then studied extensively in Euclidean space, yet has only very recently been considered also for spherical surfaces. We employ a generalization of the structure factor on the sphere, related to the power spectrum of the corresponding multipole expansion of particle density distribution. The spherical structure factor is then shown to couple with cap number variance, a measure of density variations at different scales, allowing us to analytically derive different forms of the variance pertaining to different types of distributions. Based on these forms, we construct a classification of hyperuniformity for scale-free particle distributions on the sphere and show how it can be extended to include other distribution types as well. We demonstrate that hyperuniformity on the sphere can be defined either through a vanishing spherical structure factor at low multipole numbers or through a scaling of the cap number variance-in both cases extending the Euclidean definition, while at the same time pointing out crucial differences. Our work thus provides a comprehensive tool for detecting global, long-range order on spheres and for the analysis of spherical computational meshes, biological and synthetic spherical assemblies, and ordering phase transitions in spherically distributed particles.
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Affiliation(s)
- Anže Lošdorfer Božič
- Department of Theoretical Physics, Jožef Stefan Institute, SI-1000 Ljubljana, Slovenia
| | - Simon Čopar
- Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia
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73
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Koroleva M, Bidanov D, Yurtov E. Emulsions stabilized with mixed SiO2 and Fe3O4 nanoparticles: mechanisms of stabilization and long-term stability. Phys Chem Chem Phys 2019; 21:1536-1545. [DOI: 10.1039/c8cp05292a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Using SiO2 and Fe3O4 nanoparticles as stabilizers makes it possible to obtain Pickering emulsions with long-term stability to coalescence and creaming.
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Affiliation(s)
- M. Koroleva
- Mendeleev University of Chemical Technology
- Moscow 125047
- Russia
| | - D. Bidanov
- Mendeleev University of Chemical Technology
- Moscow 125047
- Russia
| | - E. Yurtov
- Mendeleev University of Chemical Technology
- Moscow 125047
- Russia
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74
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Itzhaik Alkotzer Y, Grzegorzewski F, Belausov E, Zelinger E, Mechrez G. In situ interfacial surface modification of hydrophilic silica nanoparticles by two organosilanes leading to stable Pickering emulsions. RSC Adv 2019; 9:39611-39621. [PMID: 35541385 PMCID: PMC9076063 DOI: 10.1039/c9ra07597f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 11/25/2019] [Indexed: 11/21/2022] Open
Abstract
Oil-in-water Pickering emulsions are stabilized by in situ functionalization of hydrophilic silica nanoparticles with two organosilane precursors of opposite polarity, dodecyltriethoxysilane (DTES) and 3-(aminopropyl)triethoxysilane (APTES), in a two-step emulsification procedure. The modification of the silica nanoparticles is verified by Fourier transform infrared (FTIR) spectroscopy analysis. The stabilization of the oil droplets by silica is confirmed by tracing the localization of the colloidal silica nanoparticles at the oil–water interface, as observed by confocal fluorescence microscopy. In comparison to modification of the silica nanoparticles prior to the emulsification, in situ functionalization of silica with both organosilanes achieves enhanced emulsion stability and homogeneity, by forming a polysiloxane network between the silica nanoparticles, through polymerization of the organosilanes in the presence of water. The polysiloxane network fixes the silica in place as solid shells around the emulsion droplets, in structures called colloidosomes. These colloidosome shell structures are visualized using confocal microscopy and cryogenic scanning electron microscopy, the latter method successfully enables the direct observation of the silica nanoparticles embedded in the polysiloxane matrix around the oil droplets. Stabilizing the Pickering emulsion droplets and forming silica-based colloidosome shells is dependent on the extent of the hydrolysis and polycondensation reaction of the two organosilanes. Oil-in-water Pickering emulsions are stabilized by in situ functionalization of hydrophilic silica nanoparticles with two organosilane precursors of opposite polarity in a two-step emulsification procedure.![]()
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Affiliation(s)
- Yafit Itzhaik Alkotzer
- Department of Food Sciences
- Institute of Postharvest and Food Sciences
- Agricultural Research Organization (ARO)
- Volcani Center
- Rishon Letzion 7505101
| | - Franziska Grzegorzewski
- Department of Food Sciences
- Institute of Postharvest and Food Sciences
- Agricultural Research Organization (ARO)
- Volcani Center
- Rishon Letzion 7505101
| | - Eduard Belausov
- Department of Ornamental Plants and Agricultural Biotechnology
- Institute of Plant Sciences
- Agricultural Research Organization (ARO)
- Volcani Center
- Rishon Letzion 7505101
| | - Einat Zelinger
- The Interdepartmental Equipment Unit
- The Robert H. Smith Faculty of Agriculture
- Food and Environment
- The Hebrew University of Jerusalem
- Rehovot 7610001
| | - Guy Mechrez
- Department of Food Sciences
- Institute of Postharvest and Food Sciences
- Agricultural Research Organization (ARO)
- Volcani Center
- Rishon Letzion 7505101
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75
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Dockx G, Geisel S, Moore DG, Koos E, Studart AR, Vermant J. Designer liquid-liquid interfaces made from transient double emulsions. Nat Commun 2018; 9:4763. [PMID: 30420659 PMCID: PMC6232135 DOI: 10.1038/s41467-018-07272-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 10/24/2018] [Indexed: 11/29/2022] Open
Abstract
Current methods for generating liquid-liquid interfaces with either controlled composition or coverage often rely on adsorption equilibria which limits the freedom to design such multiphase materials, in particular when different components are used. Moreover, when interfaces become densely populated, slowing down of adsorption may impose additional constraints. Up to now, it is not possible to control surface coverage and composition of droplet interfaces at will. Here, we report a generic and versatile method to create designer liquid-liquid interfaces, using transient double emulsions. We demonstrate how the surface coverage in Pickering emulsions can be controlled at will, even for dense particulate layers going up to multilayers. Moreover, composite droplet interfaces with compositional control can be generated, even with particles which would have intrinsically different or even opposite adsorption characteristics. Given its simplicity, this method offers a general approach for control of composition of liquid-liquid interfaces in a variety of multiphase systems.
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Affiliation(s)
- Greet Dockx
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Steffen Geisel
- Soft Materials, Department of Materials, ETH Zurich, CH-8093, Zurich, Switzerland
| | - David G Moore
- Complex Materials, Department of Materials, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Erin Koos
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Andre R Studart
- Complex Materials, Department of Materials, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Jan Vermant
- Soft Materials, Department of Materials, ETH Zurich, CH-8093, Zurich, Switzerland.
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76
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Shi S, Russell TP. Nanoparticle Assembly at Liquid-Liquid Interfaces: From the Nanoscale to Mesoscale. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1800714. [PMID: 30035834 DOI: 10.1002/adma.201800714] [Citation(s) in RCA: 166] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 03/29/2018] [Indexed: 05/21/2023]
Abstract
In the past few decades, novel syntheses of a wide range of nanoparticles (NPs) with well-defined chemical composition and structure have opened tremendous opportunities in areas ranging from optical and electronic devices to biomedical markers. Controlling the assembly of such well-defined NPs is important to effectively harness their unique properties. The assembly of NPs at liquid-liquid interfaces is becoming a central topic both in surface and colloid science. Hierarchical structures, including 2D films, 3D capsules, and structured liquids, have been generating significant interest and are showing promise for physical, chemical, and biological applications. Here, a brief overview of the development of the self-assembly of NPs at liquid-liquid interfaces is provided, from theory to experiment, from synthetic NPs to bio-nanoparticles, from water-oil to water-water, and from "liquid-like" to "solid-like" assemblies.
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Affiliation(s)
- Shaowei Shi
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Thomas P Russell
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA, 01003, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
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77
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Douliez JP, Perro A, Chapel JP, Goudeau B, Béven L. Preparation of Template-Free Robust Yolk-Shell Gelled Particles from Controllably Evolved All-in-Water Emulsions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803042. [PMID: 30203913 DOI: 10.1002/smll.201803042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 08/14/2018] [Indexed: 06/08/2023]
Abstract
A template-free all-aqueous bulk preparation of robust hollow capsules having a gelatin shell from all-in-water double emulsions is reported. The hot (>40 °C) quaternary system water/polyethylene glycol (PEG)/gelatin/alginate is shown to spontaneously form PEG-in-gelatin-in-PEG double water emulsion droplets having a multinuclear core. These droplets are stable upon cooling below the temperature at which gelatin gelled. In contrast, above the melting temperature of gelatin, multinuclear double emulsion droplets controllably evolve into stable mononuclear yolk (aqueous PEG)-shell (gelatin) capsules dispersed in the aqueous PEG continuous phase. It is demonstrated that the gelatin shell can accommodate negatively charged latex beads and be re-enforced by glutaraldehyde or silica. These capsules are also shown to encapsulate payloads, suggesting possible applications in microencapsulation, drug delivery, and synthetic biology.
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Affiliation(s)
- Jean-Paul Douliez
- UMR1332, Biologie du Fruit et Pathologie, INRA, University of Bordeaux, Centre de Bordeaux, 33883, Villenave d'Ornon, France
| | - Adeline Perro
- University of Bordeaux, INP Bordeaux, ISM, UMR 5255, site ENSCBP, 16 av. Pey-Berland, 33607, Pessac, France
| | - Jean-Paul Chapel
- CNRS, University of Bordeaux, CRPP, 115 av. A. Schweitzer, 33600, Pessac, France
| | - Bertrand Goudeau
- University of Bordeaux, INP Bordeaux, ISM, UMR 5255, site ENSCBP, 16 av. Pey-Berland, 33607, Pessac, France
| | - Laure Béven
- UMR1332, Biologie du Fruit et Pathologie, INRA, University of Bordeaux, Centre de Bordeaux, 33883, Villenave d'Ornon, France
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78
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Hong CS, Park JH, Lee S, Rhoo KY, Lee JT, Paik SR. Fabrication of Protease-Sensitive and Light-Responsive Microcapsules Encompassed with Single Layer of Gold Nanoparticles by Using Self-Assembly Protein of α-Synuclein. ACS APPLIED MATERIALS & INTERFACES 2018; 10:26628-26640. [PMID: 30052414 DOI: 10.1021/acsami.8b07661] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A bioapplicable cargo delivery system requires the following characteristics of biocompatibility, in vivo stability, and selective cargo release at target sites. We introduce herein the microcapsules enclosed with a single-layered shell of gold nanoparticles (AuNPs) mutually connected by an amyloidogenic protein of α-synuclein (αS). The microcapsules were fabricated by producing oil(chloroform)-in-water Pickering emulsions of the αS-encapsulated AuNPs and subsequent molecular engagement of the outlying αS molecules, leading to formidable β-sheet formation in the presence of chloroform. The wrinkled skin of microcapsules obtained after evaporation of the internal chloroform also reflects robustness of the protein-protein interaction, which was experimentally confirmed by their rheological stability. For the emulsions loaded with rhodamine 6G, their dye release was demonstrated to be controlled by proteases. Along with their photothermal activity, the AuNP-containing microcapsules and their proteolyzed fragments were therefore suggested to be capable of eliminating aberrant cells in the protease-activated pathologically affected areas. Orthogonal cargo loading was also achieved by encapsulating both hydrophobic and hydrophilic substances either directly dissolved in chloroform or prepackaged in inverted micelles, respectively. Microcapsule's functionality was further expanded by localizing quantum dots, magnetic nanoparticles, and antibodies inside or on the surface of the microcapsules. Taken together, these multimodal AuNP microcapsules are suggested to be an ideal cargo carrier system, which could be employed in not only biomedical theranostic applications as they exhibit structural robustness, specific targeting, triggered release, and photothermal activity but also sensor development in general.
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Affiliation(s)
- Chul-Suk Hong
- School of Chemical and Biological Engineering, Institute of Chemical Processes, College of Engineering , Seoul National University , Seoul 08826 , Korea
| | - Jae Hyung Park
- School of Chemical and Biological Engineering, Institute of Chemical Processes, College of Engineering , Seoul National University , Seoul 08826 , Korea
| | - Soonkoo Lee
- School of Chemical and Biological Engineering, Institute of Chemical Processes, College of Engineering , Seoul National University , Seoul 08826 , Korea
| | - Kun Yil Rhoo
- School of Chemical and Biological Engineering, Institute of Chemical Processes, College of Engineering , Seoul National University , Seoul 08826 , Korea
| | - Jong Tak Lee
- School of Chemical and Biological Engineering, Institute of Chemical Processes, College of Engineering , Seoul National University , Seoul 08826 , Korea
| | - Seung R Paik
- School of Chemical and Biological Engineering, Institute of Chemical Processes, College of Engineering , Seoul National University , Seoul 08826 , Korea
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79
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Mallikarjunachari G, Nallamilli T, Ravindran P, Basavaraj MG. Nanoindentation of clay colloidosomes. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.04.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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80
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Lei L, Kong T, Zhu P, Kang Z, Tian X, Wang L. Self-Assembly of TiO 2 Nanofiber-Based Microcapsules by Spontaneously Evolved Multiple Emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8785-8791. [PMID: 29983067 DOI: 10.1021/acs.langmuir.8b01472] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We demonstrate hierarchical nest/crust-like colloidosomes composed of interlocked titanium dioxide (TiO2) nanofibers using spontaneously evolved n-butanol/water/ n-butanol (B/W/B) emulsions. We find two mechanisms to produce colloidosomes from B/W/B droplets due to their mutual solubility and dewetting discrepancy. Porous TiO2 colloidal capsules with loosely intertwined nanofibers were obtained after the dewetting of nanofiber-coated B/W/B droplets, while crustlike TiO2 colloidosomes with a thin shell and large hollow interior are developed from amphiphilic polymer-stabilized B/W/B droplets. We further investigate the effect of experimental parameters, including the initial droplet size, the nanofiber concentration, and the water/butanol ratios in butanol phases, on the droplet-to-colloidosome evolution and resultant morphology of colloidosomes. Our simple and versatile approach for fabricating TiO2 colloidosomes can be extended to a range of irregular colloidal particles, and the products have great potential to act as host systems in electrochemical catalysis, photothermal therapy, or filtration materials.
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Affiliation(s)
- Leyan Lei
- Department of Mechanical Engineering , University of Hong Kong , Hong Kong SAR 999077 , China
| | - Tiantian Kong
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, School of Medicine , Shenzhen University , Shenzhen , Guangdong 51800 , China
- HKU-Zhejiang Institute of Research and Innovation (HKU-ZIRI) , Hangzhou , Zhejiang 310000 , China
| | - Pingan Zhu
- Department of Mechanical Engineering , University of Hong Kong , Hong Kong SAR 999077 , China
- HKU-Zhejiang Institute of Research and Innovation (HKU-ZIRI) , Hangzhou , Zhejiang 310000 , China
| | - Zhanxiao Kang
- Department of Mechanical Engineering , University of Hong Kong , Hong Kong SAR 999077 , China
- HKU-Zhejiang Institute of Research and Innovation (HKU-ZIRI) , Hangzhou , Zhejiang 310000 , China
| | - Xiaowei Tian
- Department of Mechanical Engineering , University of Hong Kong , Hong Kong SAR 999077 , China
- HKU-Zhejiang Institute of Research and Innovation (HKU-ZIRI) , Hangzhou , Zhejiang 310000 , China
| | - Liqiu Wang
- Department of Mechanical Engineering , University of Hong Kong , Hong Kong SAR 999077 , China
- HKU-Zhejiang Institute of Research and Innovation (HKU-ZIRI) , Hangzhou , Zhejiang 310000 , China
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81
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Morphew D, Chakrabarti D. Programming hierarchical self-assembly of colloids: matching stability and accessibility. NANOSCALE 2018; 10:13875-13882. [PMID: 29993063 DOI: 10.1039/c7nr09258j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Encoding hierarchical self-assembly in colloidal building blocks is a promising bottom-up route to high-level structural complexity often observed in biological materials. However, harnessing this promise faces the grand challenge of bridging hierarchies of multiple length- and time-scales, associated with structure and dynamics respectively along the self-assembly pathway. Here we report on a case study, which examines the kinetic accessibility of a series of hollow spherical structures with a two-level structural hierarchy self-assembled from charge-stabilized colloidal magnetic particles. By means of a variety of computational methods, we find that for a staged assembly pathway, the structure, which derives the strongest energetic stability from the first stage of assembly and the weakest from the second stage, is most kinetically accessible. Such a striking correspondence between energetics and kinetics for optimal design principles should have general implications for programming hierarchical self-assembly pathways for nano- and micro-particles, while matching stability and accessibility.
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Affiliation(s)
- Daniel Morphew
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
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82
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Manga MS, Cayre OJ, Biggs S, Hunter TN. Influence of pH-Responsive Monomer Content on the Behavior of Di-Block Copolymers in Solution and as Stabilizers of Pickering Latex Particle Emulsifiers. Front Chem 2018; 6:301. [PMID: 30079336 PMCID: PMC6062645 DOI: 10.3389/fchem.2018.00301] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 06/29/2018] [Indexed: 11/13/2022] Open
Abstract
In this study, diblock copolymers poly(methyl methacrylate)-block-poly (2-dimethylaminoethyl methacrylate) (pMMA-b-pDMAEMA) are investigated for the steric stabilization of latex particles and the subsequent use of these latex particles as Pickering emulsifiers. Solution properties of the diblock copolymers highlight that the pDMAEMA block length influences the critical micelle concentration (CMC) and micelle hydrodynamic diameter in response to changes in pH and the pKa. The block length can also be used as a way to control the particle size of sterically stabilized polystyrene latex particles prepared via emulsion polymerization. The suspension properties of these latex particles are also presented. Emulsion studies using these latex particles as emulsifiers show that both continuous phase pH and electrolyte concentration affect emulsion stability to coalescence. At high pH, stable emulsions are formed due to the affinity of the particles to the interface. At low pH, protonation of the amine groups reduces the affinity and thus droplet coalescence is observed. Increasing the electrolyte concentration improves emulsion stability, but causes an increase in droplet size due to adsorption of flocculated/aggregated particles. Finally, it is shown that these latex particles can be used in conjunction with membrane emulsification techniques to produce emulsions with low polydispersity.
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Affiliation(s)
- Mohamed S Manga
- Faculty of Engineering, School of Chemical and Process Engineering, University of Leeds, Leeds, United Kingdom
| | - Olivier J Cayre
- Faculty of Engineering, School of Chemical and Process Engineering, University of Leeds, Leeds, United Kingdom
| | - Simon Biggs
- Faculty of Engineering, School of Chemical and Process Engineering, University of Leeds, Leeds, United Kingdom.,The University of Western Australia, Perth, WA, Australia
| | - Timothy N Hunter
- Faculty of Engineering, School of Chemical and Process Engineering, University of Leeds, Leeds, United Kingdom
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83
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Hegemann J, Boltz HH, Kierfeld J. Elastic capsules at liquid-liquid interfaces. SOFT MATTER 2018; 14:5665-5685. [PMID: 29946629 DOI: 10.1039/c8sm00316e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We investigate the deformation of elastic microcapsules adsorbed at liquid-liquid interfaces. An initially spherical elastic capsule at a liquid-liquid interface undergoes circumferential stretching due to the liquid-liquid surface tension and becomes lens- or discus-shaped, depending on its bending rigidity. The resulting elastic capsule deformation is qualitatively similar, but distinct from the deformation of a liquid droplet into a liquid lens at a liquid-liquid interface. We discuss the deformed shapes of droplets and capsules adsorbed at liquid-liquid interfaces for a whole range of different surface elasticities: from droplets (only surface tension) deforming into liquid lenses, droplets with a Hookean membrane (finite stretching modulus, zero bending modulus) deforming into elastic lenses, to microcapsules (finite stretching and bending modulus) deforming into rounded elastic lenses. We calculate capsule shapes at liquid-liquid interfaces numerically using shape equations from nonlinear elastic shell theory. Finally, we present theoretical results for the contact angle (or the capsule height) and the maximal capsule curvature at the three phase contact line. These results can be used to infer information about the elastic moduli from optical measurements. During capsule deformation into a lens-like shape, surface energy of the liquid-liquid interface is converted into elastic energy of the capsule shell giving rise to an overall adsorption energy gain by deformation. Soft hollow capsules exhibit a pronounced increase of the adsorption energy as compared to filled soft particles and, thus, are attractive candidates as foam and emulsion stabilizers.
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Affiliation(s)
- Jonas Hegemann
- Physics Department, TU Dortmund University, 44221 Dortmund, Germany.
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84
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Douliez JP, Martin N, Beneyton T, Eloi JC, Chapel JP, Navailles L, Baret JC, Mann S, Béven L. Preparation of Swellable Hydrogel-Containing Colloidosomes from Aqueous Two-Phase Pickering Emulsion Droplets. Angew Chem Int Ed Engl 2018; 57:7780-7784. [PMID: 29683257 DOI: 10.1002/anie.201802929] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Indexed: 12/22/2022]
Abstract
The fabrication of stable colloidosomes derived from water-in-water Pickering-like emulsions are described that were produced by addition of fluorescent amine-modified polystyrene latex beads to an aqueous two-phase system consisting of dextran-enriched droplets dispersed in a PEG-enriched continuous phase. Addition of polyacrylic acid followed by carbodiimide-induced crosslinking with dextran produces hydrogelled droplets capable of reversible swelling and selective molecular uptake and exclusion. Colloidosomes produced specifically in all-water systems could offer new opportunities in microencapsulation and the bottom-up construction of synthetic protocells.
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Affiliation(s)
- Jean-Paul Douliez
- UMR 1332, biologie du fruit et pathologie, INRA, Univ. Bordeaux, centre de Bordeaux, 33883, Villenave d'Ornon, France
| | - Nicolas Martin
- Centre for Organized Matter Chemistry and Centre for Protolife Research, School of Chemistry, University of Bristol, Cantock's Close, BS8 1TS, Bristol, UK
| | - Thomas Beneyton
- CNRS, Univ. Bordeaux, CRPP, 115 Av. A. Schweitzer, 33600, Pessac, France
| | - Jean-Charles Eloi
- Chemical Imaging Facility, School of Chemistry, University of Bristol, Cantock's Close, BS8 1TS, Bristol, UK
| | - Jean-Paul Chapel
- CNRS, Univ. Bordeaux, CRPP, 115 Av. A. Schweitzer, 33600, Pessac, France
| | - Laurence Navailles
- CNRS, Univ. Bordeaux, CRPP, 115 Av. A. Schweitzer, 33600, Pessac, France
| | | | - Stephen Mann
- Centre for Organized Matter Chemistry and Centre for Protolife Research, School of Chemistry, University of Bristol, Cantock's Close, BS8 1TS, Bristol, UK
| | - Laure Béven
- UMR 1332, biologie du fruit et pathologie, INRA, Univ. Bordeaux, centre de Bordeaux, 33883, Villenave d'Ornon, France
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85
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Douliez JP, Martin N, Beneyton T, Eloi JC, Chapel JP, Navailles L, Baret JC, Mann S, Béven L. Preparation of Swellable Hydrogel-Containing Colloidosomes from Aqueous Two-Phase Pickering Emulsion Droplets. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802929] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jean-Paul Douliez
- UMR 1332, biologie du fruit et pathologie, INRA; Univ. Bordeaux; centre de Bordeaux 33883 Villenave d'Ornon France
| | - Nicolas Martin
- Centre for Organized Matter Chemistry and Centre for Protolife Research; School of Chemistry; University of Bristol; Cantock's Close BS8 1TS Bristol UK
| | - Thomas Beneyton
- CNRS; Univ. Bordeaux; CRPP; 115 Av. A. Schweitzer 33600 Pessac France
| | - Jean-Charles Eloi
- Chemical Imaging Facility; School of Chemistry; University of Bristol; Cantock's Close BS8 1TS Bristol UK
| | - Jean-Paul Chapel
- CNRS; Univ. Bordeaux; CRPP; 115 Av. A. Schweitzer 33600 Pessac France
| | | | | | - Stephen Mann
- Centre for Organized Matter Chemistry and Centre for Protolife Research; School of Chemistry; University of Bristol; Cantock's Close BS8 1TS Bristol UK
| | - Laure Béven
- UMR 1332, biologie du fruit et pathologie, INRA; Univ. Bordeaux; centre de Bordeaux 33883 Villenave d'Ornon France
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86
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McNamee CE, Sato Y, Wiege B, Furikado I, Marefati A, Nylander T, Kappl M, Rayner M. Rice Starch Particle Interactions at Air/Aqueous Interfaces-Effect of Particle Hydrophobicity and Solution Ionic Strength. Front Chem 2018; 6:139. [PMID: 29868551 PMCID: PMC5962698 DOI: 10.3389/fchem.2018.00139] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 04/12/2018] [Indexed: 12/20/2022] Open
Abstract
Starch particles modified by esterification with dicarboxylic acids to give octenyl succinic anhydride (OSA) starch is an approved food additive that can be used to stabilize oil in water emulsions used in foods and drinks. However, the effects of the OSA modification of the starch particle on the interfacial interactions are not fully understood. Here, we directly measured the packing of films of rice starch granules, i.e., the natural particle found inside the plant, at air/aqueous interfaces, and the interaction forces in that system as a function of the particle hydrophobicity and ionic strength, in order to gain insight on how starch particles can stabilize emulsions. This was achieved by using a combined Langmuir trough and optical microscope system, and the Monolayer Interaction Particle Apparatus. Native rice starch particles were seen to form large aggregates at air/water interfaces, causing films with large voids to be formed at the interface. The OSA modification of the rice starches particles decreased this aggregation. Increasing the degree of modification improved the particle packing within the film of particles at the air/water interface, due to the introduction of inter-particle electrostatic interactions within the film. The introduction of salt to the water phase caused the particles to aggregate and form holes within the film, due to the screening of the charged groups on the starch particles by the salt. The presence of these holes in the film decreased the stiffness of the films. The effect of the OSA modification was concluded to decrease the aggregation of the particles at an air/water interface. The presence of salts, however, caused the particles to aggregate, thereby reducing the strength of the interfacial film.
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Affiliation(s)
- Cathy E McNamee
- Faculty of Textile Science and Technology, Shinshu University, Ueda, Japan
| | - Yu Sato
- Faculty of Textile Science and Technology, Shinshu University, Ueda, Japan
| | | | | | - Ali Marefati
- Department of Food Technology, Engineering and Nutrition, Lund University, Lund, Sweden
| | | | - Michael Kappl
- Max Planck Institute for Polymer Research, Mainz, Germany
| | - Marilyn Rayner
- Department of Food Technology, Engineering and Nutrition, Lund University, Lund, Sweden
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87
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Mohammadian M, Madadlou A. Technological functionality and biological properties of food protein nanofibrils formed by heating at acidic condition. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2018.03.013] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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88
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Chen Y, Li Z, Wang H, Pei Y, Shi Y, Wang J. Visible Light-Controlled Inversion of Pickering Emulsions Stabilized by Functional Silica Microspheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2784-2790. [PMID: 29382203 DOI: 10.1021/acs.langmuir.7b03822] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new class of donor-acceptor Stenhouse adduct (DASA)-functionalized silica microspheres (SMs) is designed and described to formulate Pickering emulsions with inversion property and large polarity change upon visible light irradiation. By tuning the hydrophilicity of the functional SM particles with visible light, these Pickering emulsions can easily perform inversion from water-in-oil to oil-in-water. The inversion performance of the emulsions is ascribed to DASA photoisomerization from an extended, hydrophobic, and intensely purple-colored triene to a compact, zwitterionic, and colorless cyclopentenone upon irradiation with visible light. This unique inversion behavior has been applied to control encapsulation and the release of fluorescein sodium salt.
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Affiliation(s)
- Yongkui Chen
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University , Xinxiang, Henan 453007, P. R. China
- School of Chemistry and Chemical Engineering, Xinxiang University , Xinxiang, Henan 453003, P. R. China
| | - Zhiyong Li
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Huiyong Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Yuanchao Pei
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Yunlei Shi
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University , Xinxiang, Henan 453007, P. R. China
| | - Jianji Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University , Xinxiang, Henan 453007, P. R. China
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89
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Sciortino F, Cuny J, Grasset F, Lagrost C, Lemoine P, Moréac A, Molard Y, Takei T, Cordier S, Chevance S, Gauffre F. The Ouzo effect to selectively assemble molybdenum clusters into nanomarbles or nanocapsules with increased HER activity. Chem Commun (Camb) 2018; 54:13387-13390. [DOI: 10.1039/c8cc07402j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Molybdenum clusters assemble spontaneously into nanocapsules or nanomarbles depending on their solubility in a water/THF mixture.
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Affiliation(s)
| | - Jérôme Cuny
- Laboratoire de Chimie et Physique Quantiques
- IRSAMC
- Université Paul Sabatier
- 31062 Toulouse Cedex 4
- France
| | - Fabien Grasset
- CNRS
- LINK (Laboratory for Innovative Key Materials and Structures)-UMI3629
- National Institute for Materials Science (NIMS)
- Tsukuba 305-0044
- Japan
| | | | | | | | - Yann Molard
- Univ Rennes
- CNRS
- ISCR-UMR6226
- SCANMat-UMS2001
- F-35000 Rennes
| | - Toshiaki Takei
- International Center for Materials Nanoarchitectonics
- MANA
- National Institute for Material Science (NIMS)
- Tsukuba 305-0044
- Japan
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90
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Wang G, Wang Z, Lee B, Yuan R, Lu Z, Yan J, Pan X, Song Y, Bockstaller MR, Matyjaszewski K. Polymerization-induced self-assembly of acrylonitrile via ICAR ATRP. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.09.029] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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91
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Higher-order assembly of crystalline cylindrical micelles into membrane-extendable colloidosomes. Nat Commun 2017; 8:426. [PMID: 28871204 PMCID: PMC5583177 DOI: 10.1038/s41467-017-00465-z] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Accepted: 06/30/2017] [Indexed: 11/24/2022] Open
Abstract
Crystallization-driven self-assembly of diblock copolymers into cylindrical micelles of controlled length has emerged as a promising approach to the fabrication of functional nanoscale objects with high shape anisotropy. Here we show the preparation of a series of crystallizable diblock copolymers with appropriate wettability and chemical reactivity, and demonstrate their self-assembly into size-specific cylindrical micelle building blocks for the hierarchical construction of mechanically robust colloidosomes with a range of membrane textures, surface chemistries and optical properties. The colloidosomes can be structurally elaborated post assembly by in situ epitaxial elongation of the membrane building blocks to produce microcapsules covered in a chemically distinct, dense network of hair-like outgrowths. Our approach provides a route to hierarchically ordered colloidosomes that retain the intrinsic growth activity of their constituent building blocks to permit biofunctionalization, and have potential applications in areas such as biomimetic encapsulation, drug delivery, catalysis and biosensing. Functional nanoscale objects can be prepared via crystallization-driven self-assembly of diblock copolymers. Here the authors show the self-assembly of crystalline block copolymers into size-specific cylindrical micelles for the hierarchical construction of mechanically robust colloidosomes with a range of membrane textures.
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92
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Morphew D, Chakrabarti D. Clusters of anisotropic colloidal particles: From colloidal molecules to supracolloidal structures. Curr Opin Colloid Interface Sci 2017. [DOI: 10.1016/j.cocis.2017.05.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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93
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Lei L, Zhang Q, Shi S, Zhu S. Breathable Microgel Colloidosome: Gas-Switchable Microcapsules with O 2 and CO 2 Tunable Shell Permeability for Hierarchical Size-Selective Control Release. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:6108-6115. [PMID: 28574273 DOI: 10.1021/acs.langmuir.7b01092] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Microcapsules enabling precise delivery and controlled release are highly desirable. However, it is still challenging to control the release profile by regulating the microcapsule shell permeability. In this work, gas-switchable microgel colloidosome (MGC) with oxygen (O2) and carbon dioxide (CO2) dual gas-tunable shell permeability has been developed and tested for control release of water-soluble cargo molecules, based on the size exclusion mechanism. The O2 and CO2 dual gas-switchable poly(2-(diethylamino)ethyl methacrylate-co-2,3,4,5,6-pentafluorostyrene), P(DEA-co-FS), microgels having surface modified with amino group (-NH2) were synthesized and used to stabilize oil-in-water (O/W) Pickering emulsions. The oil-soluble poly(propylene glycol) diglycidyl ether (PPGDGE) was added as an intermicrogel cross-linker. The cross-linking between adjacent microgel particles at the water-oil interface was achieved through the amine-epoxy reaction of PPGDGE with the amine groups at the particle surface. Fluorescent-labeled dextran model cargo molecules of 10 kDa (D1) and 2000 kDa (D2) were uploaded under CO2 treatment and locked inside the MGC with N2 treatment. The O2 and CO2 dual-gas switchable properties offered the MGC with tunable shell permeability, which allowed the hierarchical release of D1 and D2 based on size exclusive mechanism. This work provides a robust method for preparation of gas-switchable microcapsules with tunable permeability and size-exclusive hierarchical release profile, promising for multiple ingredient controllable release, separation, and reaction.
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Affiliation(s)
- Lei Lei
- Department of Chemical Engineering, McMaster University , Hamilton, Canada L8S 4L7
| | - Qi Zhang
- College of Chemical Engineering, Zhejiang University of Technology , Hangzhou 310014, China
| | - Shuxian Shi
- Key Laboratory of Carbon Fiber and Functional Polymers (Ministry of Education), Beijing University of Chemical Technology , Beijing 100029, China
| | - Shiping Zhu
- Department of Chemical Engineering, McMaster University , Hamilton, Canada L8S 4L7
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94
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Zhang L, Fan Q, Sha X, Zhong P, Zhang J, Yin Y, Gao C. Self-assembly of noble metal nanoparticles into sub-100 nm colloidosomes with collective optical and catalytic properties. Chem Sci 2017; 8:6103-6110. [PMID: 29619198 PMCID: PMC5859888 DOI: 10.1039/c7sc01841j] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 06/15/2017] [Indexed: 12/12/2022] Open
Abstract
Self-assembly at the nanoscale represents a powerful tool for creating materials with new structures and intriguing collective properties. Here, we report a novel strategy to synthesize nanoscale colloidosomes of noble metals by assembling primary metal nanoparticles at the interface of emulsion droplets formed by their capping agent. This strategy produces noble metal colloidosomes of unprecedentedly small sizes (<100 nm) in high yield and uniformity, which is highly desirable for practical applications. In addition, it enables the high tunability of the composition, producing a diversity of monometallic and bimetallic alloy colloidosomes. The colloidosomes exhibit interesting collective properties that are different from those of individual colloidal nanoparticles. Specifically, we demonstrate Au colloidosomes with well-controlled interparticle plasmon coupling and Au-Pd alloy colloidosomes with superior electrocatalytic performance, both thanks to the special structural features that arise from the assembly. We believe this strategy provides a general platform for producing a rich class of miniature colloidosomes that may have fascinating collective properties for a broad range of applications.
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Affiliation(s)
- Lei Zhang
- Centre for Materials Chemistry , Frontier Institute of Science and Technology , Xi'an Jiaotong University , Xi'an , Shaanxi 710054 , China .
| | - Qikui Fan
- Centre for Materials Chemistry , Frontier Institute of Science and Technology , Xi'an Jiaotong University , Xi'an , Shaanxi 710054 , China .
| | - Xiao Sha
- Centre for Materials Chemistry , Frontier Institute of Science and Technology , Xi'an Jiaotong University , Xi'an , Shaanxi 710054 , China .
| | - Ping Zhong
- Centre for Materials Chemistry , Frontier Institute of Science and Technology , Xi'an Jiaotong University , Xi'an , Shaanxi 710054 , China .
| | - Jie Zhang
- School of Materials Science and Engineering , Xi'an Jiaotong University , Xi'an , Shaanxi 710049 , China
| | - Yadong Yin
- Department of Chemistry , University of California , Riverside , California 92521 , USA
| | - Chuanbo Gao
- Centre for Materials Chemistry , Frontier Institute of Science and Technology , Xi'an Jiaotong University , Xi'an , Shaanxi 710054 , China .
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95
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Nakato T, Nono Y, Mouri E. Textural diversity of hierarchical macroscopic structures of colloidal liquid crystalline nanosheets organized under electric fields. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.02.092] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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96
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Nur M, Vasiljevic T. Can natural polymers assist in delivering insulin orally? Int J Biol Macromol 2017; 103:889-901. [PMID: 28552728 DOI: 10.1016/j.ijbiomac.2017.05.138] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 05/01/2017] [Accepted: 05/23/2017] [Indexed: 02/02/2023]
Abstract
Diabetes mellitus is one of the most grave and lethal non communicable diseases. Insulin is normally used to medicate diabetes. Due to bioavailability issues, the most regular route of administration is through injection, which may pose compliance problems to treatment. The oral administration thus appears as a suitable alternative, but with several important problems. Low stability of insulin in the gastrointestinal tract and low intestinal permeation are some of the issues. Encapsulation of insulin into polymer-based particles emerges as a plausible strategy. Different encapsulation approaches and polymers have been used in this regard. Polymers with different characteristics from natural or synthetic origin have been assessed to attain this goal, with natural polymers being preferable. Natural polymers studied so far include chitosan, alginate, carrageenan, starch, pectin, casein, tragacanth, dextran, carrageenan, gelatine and cyclodextrin. While some promising knowledge and results have been gained, a polymeric-based particle system to deliver insulin orally has not been introduced onto the market yet. In this review, effectiveness of different natural polymer materials developed so far along with fabrication techniques are evaluated.
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Affiliation(s)
- Mokhamad Nur
- Advanced Food Systems Research Unit, College of Health and Biomedicine, Victoria University, PO Box 14428, Melbourne, 8001, Australia; Department of Agricultural Product Technology, Faculty of Agricultural Technology, Brawijaya University, Jl. Veteran, 65145, Malang, Indonesia
| | - Todor Vasiljevic
- Advanced Food Systems Research Unit, College of Health and Biomedicine, Victoria University, PO Box 14428, Melbourne, 8001, Australia.
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97
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Yin D, Bai L, Jia Y, Liu J, Zhang Q. Microencapsulation through thermally sintering Pickering emulsion-based colloidosomes. SOFT MATTER 2017; 13:3720-3725. [PMID: 28451672 DOI: 10.1039/c7sm00528h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Microcapsules of a phase change material synthesized by thermally sintering Pickering emulsion-based colloidosomes were demonstrated. The protocol included three steps: (1) monodispersive poly(glycidyl methacrylate) (PGMA) microspheres were prepared by dispersive polymerization and were endowed with a contact angle of 63.4° for oil-in-water Pickering stabilization by hydrolysis. (2) By phase separation during Pickering emulsion polymerization, microcapsules with a structure of a single PCM core and a PGMA armored polystyrene shell were fabricated. (3) Thermal sintering was performed to fuse the polystyrene and PGMA microspheres into an integral shell of the microcapsules. The durability of the microcapsules before and after sintering was investigated by a suspension test (in water and ethanol) and an accelerated thermal cycling test. The sintering reduced the percentage of leaked dodecanol from 19.6% to 10.3% in the suspension test in ethanol and from 10.4% to 2.8% in the accelerated cycling test. These results verified that the sintering process endowed the prepared microcapsules with better tightness and durability.
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Affiliation(s)
- Dezhong Yin
- School of Science, Northwestern Polytechnical University, Xi'an 710072, China.
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98
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Schröder A, Sprakel J, Schroën K, Berton-Carabin CC. Tailored microstructure of colloidal lipid particles for Pickering emulsions with tunable properties. SOFT MATTER 2017; 13:3190-3198. [PMID: 28397896 DOI: 10.1039/c6sm02432g] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Sub-micron colloidal lipid particles (CLPs) can successfully be used as Pickering stabilizers in oil-in-water (O/W) emulsions, leading to an enhanced physical stability compared to conventional emulsifier-stabilized emulsions. Varying the lipid solid-liquid ratio leads to particles with distinct nanostructure and morphology, resulting in tunable emulsion stabilization performance. Our CLPs are produced by hot high pressure homogenization of high melting point fats in water, and subsequent cooling to induce lipid crystallization. Lath-like tripalmitin and palm stearin CLPs form jammed, cohesive interfacial layers that prevent relaxation of emulsion droplets, and form a three-dimensional network in the continuous aqueous phase. CLPs consisting of a mixture of solid tripalmitin and liquid tricaprylin are polycrystalline platelet-like particles that form O/W emulsions with spherical and bridged droplets covered by a thin particle layer. Our results present a versatile approach to interfacial design that also opens up new perspectives for development of novel delivery systems for active ingredients.
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Affiliation(s)
- Anja Schröder
- Laboratory of Food Process Engineering, Wageningen University and Research, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands.
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99
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McNamee CE, Fujii S, Yusa SI, Kappl M. Physical properties of mixed Langmuir monolayers of polystyrene particles with poly(N,N-dimethylaminoethylmethacrylate) hairs and a poly(2-hydroxyethyl methacrylate) polymer at an air/water interface. SOFT MATTER 2017; 13:1583-1593. [PMID: 28127612 DOI: 10.1039/c6sm02529c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The effect of adding a poly(2-hydroxyethyl methacrylate) (PHEMA) polymer to a Langmuir monolayer of polystyrene particles carrying poly(N,N-dimethylaminoethylmethacrylate) hair (PDMA-PS particles) at air/water interfaces on the physical properties of the monolayer was studied. The addition of PHEMA to a PDMA-PS particle monolayer at an air/water interface gave a polymer-like monolayer at low surface pressures and a particle-like monolayer at high surface pressures. The PDMA-PS particles formed small aggregates that were dispersed throughout the PHEMA monolayer at low surface pressures, a result suggesting that the particles were trapped in the PHEMA network. Monolayers of closely packed particles were observed at higher surface pressures, suggesting that PHEMA was squeezed-out at higher surface pressures. The stiffness of the mixed monolayer was independent of the surface pressure, but increased as the ratio of PHEMA in the mixed monolayer increased. This increased stiffness was explained by the immobilization of the PDMA-PS particles by PHEMA.
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Affiliation(s)
- Cathy E McNamee
- Department of Chemistry and Materials, Faculty of Textile Science and Technology, Shinshu University, Tokida 3-15-1, Ueda, Nagano 386-8567, Japan.
| | - Syuji Fujii
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Shin-Ichi Yusa
- Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
| | - Michael Kappl
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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100
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Bollhorst T, Jakob S, Köser J, Maas M, Rezwan K. Chitosan supraparticles with fluorescent silica nanoparticle shells and nanodiamond-loaded cores. J Mater Chem B 2017; 5:1664-1672. [DOI: 10.1039/c6tb03069f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Supraparticles with a biopolymer chitosan core and templated with (ultra)small nanoparticles are reported. Nanoparticle density on the template surface could be controlled and the template core could be loaded with nanodiamonds.
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Affiliation(s)
- T. Bollhorst
- Advanced Ceramics
- Department of Production Engineering & MAPEX Center for Materials and Processes
- University of Bremen
- 28359 Bremen
- Germany
| | - S. Jakob
- Advanced Ceramics
- Department of Production Engineering & MAPEX Center for Materials and Processes
- University of Bremen
- 28359 Bremen
- Germany
| | - J. Köser
- Center for Environmental Research and Sustainable Technology
- University of Bremen
- 28359 Bremen
- Germany
| | - M. Maas
- Advanced Ceramics
- Department of Production Engineering & MAPEX Center for Materials and Processes
- University of Bremen
- 28359 Bremen
- Germany
| | - K. Rezwan
- Advanced Ceramics
- Department of Production Engineering & MAPEX Center for Materials and Processes
- University of Bremen
- 28359 Bremen
- Germany
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