1
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Chen Y, Mosa A, Bouvier S, Bernard J, Ganachaud F. Proper Determination of Phase Diagrams while Nanoprecipitating Oils. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12488-12496. [PMID: 38837953 DOI: 10.1021/acs.langmuir.4c00899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
The Ouzo effect is a generic process to generate colloidal dispersions from a variety of solutes. Whereas phase diagrams have been quite easily established when nanoprecipitating polymers, the case of oils is less straightforward. Indeed, the short-term stability of generated nanodroplets in water/solvent mixtures complexifies the identification of the diagram boundaries. This article proposes two complementary methods, namely, fluorescence microscopy and dynamic light scattering, to determine with fair accuracy Ouzo limits in ternary systems oil/solvent/nonsolvent, without and with a surfactant, respectively. This accuracy in PD determination opens the way to a better understanding and control of the aggregation events during the nanoprecipitation process.
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Affiliation(s)
- Yiping Chen
- Univ Lyon, CNRS, UMR 5223, Ingénierie des Matériaux Polymères, Université Claude Bernard Lyon 1, INSA Lyon, Université Jean Monnet, F-69621 Villeurbanne Cedex, France
| | - Adèle Mosa
- Univ Lyon, CNRS, UMR 5223, Ingénierie des Matériaux Polymères, Université Claude Bernard Lyon 1, INSA Lyon, Université Jean Monnet, F-69621 Villeurbanne Cedex, France
| | - Sacha Bouvier
- Univ Lyon, CNRS, UMR 5223, Ingénierie des Matériaux Polymères, Université Claude Bernard Lyon 1, INSA Lyon, Université Jean Monnet, F-69621 Villeurbanne Cedex, France
| | - Julien Bernard
- Univ Lyon, CNRS, UMR 5223, Ingénierie des Matériaux Polymères, Université Claude Bernard Lyon 1, INSA Lyon, Université Jean Monnet, F-69621 Villeurbanne Cedex, France
| | - François Ganachaud
- Univ Lyon, CNRS, UMR 5223, Ingénierie des Matériaux Polymères, Université Claude Bernard Lyon 1, INSA Lyon, Université Jean Monnet, F-69621 Villeurbanne Cedex, France
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2
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Melnyk IV, Tomina V, Yankovych H, Kolev H, Dutkova E, Breijaert TC, Kessler VG, Seisenbaeva GA. Insights into emulsion synthesis of self-assembled suprastructures formed by Janus silica particles with -NH 2/-SH surface groups. NANOSCALE ADVANCES 2024; 6:3146-3157. [PMID: 38868832 PMCID: PMC11166104 DOI: 10.1039/d3na00909b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 04/24/2024] [Indexed: 06/14/2024]
Abstract
Spherical particles with tunable anisotropic structures enabled by multiple surface functionalities have garnered interest for their potential applications in adsorption technologies. The presence of diverse functional groups in the surface layer, exhibiting varying acidity and hydrophilicity, can lead to unique characteristics in terms of surface structure and behaviour. In this study, the particles were synthesised using a two-step approach involving surface functionalisation of previously synthesised SiO2 Stöber particles. This was achieved by employing 3-mercaptopropyltrimethoxysilane (MPTMS) and 3-aminopropyltrimethoxysilane (APTMS) in a toluene-in-water emulsion. The resulting particles were found to be nonporous, with a specific surface area of 8 m2 g-1. Their sizes were determined to be up to 350 nm through photon cross-correlation spectroscopy. Moreover, the particles exhibited a high net content of functional groups (both amino and mercapto) of 2 mmol g-1. The organisation of the particles during synthesis was observed through SEM images, providing insights into their structural characteristics. Additionally, the study of Eu(iii), Au(iii), and Ag(i) ions and fluorescein adsorption demonstrated varying interactions on the surface, highlighting the potential applications and versatility of these functionalised particles.
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Affiliation(s)
- Inna V Melnyk
- Chuiko Institute of Surface Chemistry of NAS of Ukraine 17, Generala Naumova Str. Kyiv 03164 Ukraine
- Institute of Geotechnics, Slovak Academy of Sciences 45, Watsonova Str. Kosice 04001 Slovak Republic
| | - Veronika Tomina
- Chuiko Institute of Surface Chemistry of NAS of Ukraine 17, Generala Naumova Str. Kyiv 03164 Ukraine
| | - Halyna Yankovych
- Institute of Geotechnics, Slovak Academy of Sciences 45, Watsonova Str. Kosice 04001 Slovak Republic
| | - Hristo Kolev
- Institute of Catalysis, Bulgarian Academy of Sciences 11, Acad. G. Bonchev Str. Sofia 1113 Bulgaria
| | - Erika Dutkova
- Institute of Geotechnics, Slovak Academy of Sciences 45, Watsonova Str. Kosice 04001 Slovak Republic
| | - Troy C Breijaert
- Department of Molecular Sciences, Swedish University of Agricultural Sciences Box 7015, 5, Almas allé Uppsala 75007 Sweden
| | - Vadim G Kessler
- Department of Molecular Sciences, Swedish University of Agricultural Sciences Box 7015, 5, Almas allé Uppsala 75007 Sweden
| | - Gulaim A Seisenbaeva
- Department of Molecular Sciences, Swedish University of Agricultural Sciences Box 7015, 5, Almas allé Uppsala 75007 Sweden
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3
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Kamp M, Sacanna S, Dullens RPA. Spearheading a new era in complex colloid synthesis with TPM and other silanes. Nat Rev Chem 2024; 8:433-453. [PMID: 38740891 DOI: 10.1038/s41570-024-00603-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/03/2024] [Indexed: 05/16/2024]
Abstract
Colloid science has recently grown substantially owing to the innovative use of silane coupling agents (SCAs), especially 3-trimethoxysilylpropyl methacrylate (TPM). SCAs were previously used mainly as modifying agents, but their ability to form droplets and condense onto pre-existing structures has enabled their use as a versatile and powerful tool to create novel anisotropic colloids with increasing complexity. In this Review, we highlight the advances in complex colloid synthesis facilitated by the use of TPM and show how this has driven remarkable new applications. The focus is on TPM as the current state-of-the-art in colloid science, but we also discuss other silanes and their potential to make an impact. We outline the remarkable properties of TPM colloids and their synthesis strategies, and discuss areas of soft matter science that have benefited from TPM and other SCAs.
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Affiliation(s)
- Marlous Kamp
- Van 't Hoff Laboratory for Physical & Colloid Chemistry, Department of Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, The Netherlands.
| | - Stefano Sacanna
- Department of Chemistry, New York University, New York, NY, USA
| | - Roel P A Dullens
- Institute for Molecules and Materials, Radboud University, Nijmegen, The Netherlands.
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4
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Zou H, Ren Y. Synthetic strategies for nonporous organosilica nanoparticles from organosilanes. NANOSCALE 2023. [PMID: 37326150 DOI: 10.1039/d3nr00791j] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Organosilica nanoparticles refer to silica nanoparticles containing carbon along with organic or functional groups and can be divided into mesoporous organosilica nanoparticles and nonporous organosilica nanoparticles. During the past few decades, considerable efforts have been devoted to the development of organosilica nanoparticles directly from organosilanes. However, most of the reports have focused on mesoporous organosilica nanoparticles, while relatively few are concerned with nonporous organosilica nanoparticles. The synthesis of nonporous organosilica nanoparticles typically involves (i) self-condensation of an organosilane as the single source, (ii) co-condensation of two or more types of organosilanes, (iii) co-condensation of tetraalkoxysilane and an organosilane, and (iv) spontaneous emulsification and the subsequent radical polymerization of 3-(trimethoxysilyl)propyl methacrylate (TPM). This article aims to provide a review on the synthetic strategies of this important type of colloidal particle, followed by a brief discussion on their applications and future perspectives.
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Affiliation(s)
- Hua Zou
- School of Materials and Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China.
| | - Yuhang Ren
- School of Materials and Chemistry, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China.
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5
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Kempe H, Kempe M. Ouzo polymerization: A bottom-up green synthesis of polymer nanoparticles by free-radical polymerization of monomers spontaneously nucleated by the Ouzo effect; Application to molecular imprinting. J Colloid Interface Sci 2022; 616:560-570. [DOI: 10.1016/j.jcis.2022.02.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 11/25/2022]
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Tang T, Han C, Deng J, Luo G. Controllable preparation of thio-functionalized composite polysilsesquioxane microspheres in a microreaction system. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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7
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Peng Q, Hu H, Ma J, Yang J. High Performance Low Dielectric Polybenzocyclobutene Nanocomposites with Organic-Inorganic Hybrid Silicon Nanoparticles. Phys Chem Chem Phys 2022; 24:6570-6579. [DOI: 10.1039/d1cp05458a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, benzocyclobutene-functionalized organic-inorganic hybrid spherical silicon nanoparticles (BCBNPs) with controllable size (200-600 nm) and good dispersion were synthesized by one-step sol-gel method in aqueous solution. The effect of...
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8
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Chen GT, Hu TM. Stable Encapsulation of Methylene Blue in Polysulfide Organosilica Colloids for Fluorescent Tracking of Nanoparticle Uptake in Cells. ACS OMEGA 2021; 6:32109-32119. [PMID: 34870032 PMCID: PMC8637969 DOI: 10.1021/acsomega.1c04877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
Methylene blue (MB), a century-old drug and a fluorescent dye, has a long history of diverse applications, both in drug therapy and as a tissue-staining agent. However, MB is inherently unstable when exposed to light and reducing agents. In this study, we aim to prepare and characterize polysulfide-based organosilica colloidal particles for efficient, stable, and protective encapsulation of MB. Disulfide- and tetrasulfide-containing organosilane congeners were used as organosilica precursors for direct synthesis of organosilica colloids based on the silica ouzo effect. MB was spontaneously entrapped into the colloidal particles during the particle formation process. The following properties of the colloidal MB were evaluated: particle size, surface charge, atomic distribution, encapsulation efficiency, MB release, photodynamic activity, thiol and ascorbate reactivity, and cytotoxicity. The DLS measurements show that the size of colloidal MB is tunable in a range of 100 nm to 1 μm. SEM images reveal spherical particles with composition-dependent particle sizes of 70-120 nm (coefficient of variation: 15-18%). MB was encapsulated in the colloidal particles with a maximal efficiency of 95%. The release of MB from the colloids was <1% at 4 h and <3.5% at 48 h. The colloidal particles show much reduced photodynamic activity, low reactivity toward reducing agents, and low cytotoxicity. Accordingly, the colloidal MB was proposed and further investigated as a fluorescent particle tracer for the study of cell-nanoparticle interactions. In conclusion, MB can be efficiently and stably loaded into polysulfide organosilica colloidal particles using a simple and convenient physical route.
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Affiliation(s)
- Guann-Tyng Chen
- Institute
of Biopharmaceutical Sciences, National
Yang Ming Chiao Tung University, Yangming Campus, Taipei 112, Taiwan
- Tri-Service
General Hospital, Beitou-Branch, Taipei 112, Taiwan
| | - Teh-Min Hu
- Institute
of Biopharmaceutical Sciences, National
Yang Ming Chiao Tung University, Yangming Campus, Taipei 112, Taiwan
- Department
of Pharmacy, National Yang Ming Chiao Tung
University, Yangming Campus, Taipei 112, Taiwan
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9
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Neibloom D, Bevan MA, Frechette J. Droplet Formation and Growth Mechanisms in Reaction-Induced Spontaneous Emulsification of 3-(Trimethoxysilyl) Propyl Methacrylate. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11625-11636. [PMID: 34569795 DOI: 10.1021/acs.langmuir.1c02048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Spontaneous emulsification of 3-(trimethoxysilyl) propyl methacrylate (TPM) can produce complex and active colloids, nanoparticles, or monodisperse Pickering emulsions. Despite the applicability of TPM in particle synthesis, the nucleation and growth mechanisms of TPM emulsions are still poorly understood. We investigate droplet formation and growth of TPM in aqueous solutions under quiescent conditions. Our results show that in the absence of stirring the mechanisms of diffusion and stranding likely drive the spontaneous emulsification of TPM through the formation of co-soluble species during hydrolysis. In addition, turbidity and dynamic light scattering experiments show that the pH modulates the growth mechanism. At pH 10.1, the droplets grow via Ostwald ripening, while at pH 11.5, the droplets grow via monomer addition. Adding surfactants [Tween, sodium dodecyl sulfate (SDS), or cetyltrimethylammonium bromide] leads to <100 nm droplets that are kinetically stable. The growth of Tween droplets occurs through addition of TPM species while the number density of droplets is kept constant. In addition, in the presence of the ionic surfactant SDS, electrostatic repulsion between the solubilized TPM species and SDS leads to a significant increase in the number density of droplets as well as additional nucleation events. Finally, imaging of the solubilization of TPM in capillaries shows that in the absence of a surfactant, TPM hydrolysis is likely the rate-limiting step for emulsification, whereas the presence of silica particles in the aqueous phase likely acts as a catalyst of TPM hydrolysis. Our experiments highlight the importance of diffusion and solubilization of TPM species in the aqueous phase in the nucleation and growth of droplets.
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Affiliation(s)
- Denise Neibloom
- Chemical and Biomolecular Engineering Department, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Michael A Bevan
- Chemical and Biomolecular Engineering Department, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Joelle Frechette
- Chemical and Biomolecular Engineering Department, Johns Hopkins University, Baltimore, Maryland 21218, United States
- Chemical and Biomolecular Engineering Department, University of California, Berkeley, California 94760, United States
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10
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Gao F, Lei C, Liu Y, Song H, Kong Y, Wan J, Yu C. Rational Design of Dendritic Mesoporous Silica Nanoparticles' Surface Chemistry for Quantum Dot Enrichment and an Ultrasensitive Lateral Flow Immunoassay. ACS APPLIED MATERIALS & INTERFACES 2021; 13:21507-21515. [PMID: 33939415 DOI: 10.1021/acsami.1c02149] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Lateral flow immunoassays (LFIAs) have drawn much attention in point-of-care diagnostic applications, and the development of high-performance label materials is the key. In this study, the impact of the surface chemistry of dendritic mesoporous silica nanoparticles (DMSNs) on their enrichment performance toward quantum dots (QDs) and signal amplification of the resultant DMSNs-QDs as label materials have been investigated. A series of DMSNs with controllable amino/thiol group densities have been synthesized. It is demonstrated that the amino groups are beneficial for QD fluorescence preservation, owing to the amino-based surface passivation, while the thiol groups are responsible for increasing the loading capacity of QDs due to the thiol-metal coordination. The optimized DMSNs-QDs labels with an amino density of 153 μmol g-1 and a thiol density of 218 μmol g-1 displayed sufficient QD fluorescence preservation (89.4%) and high QD loading capacity (1.55 g g-1). Ultrasensitive detection of serum amyloid A (SAA) with a detection limit of 10 pg mL-1 with the naked eye was achieved, which is 1 order of magnitude higher than that reported in the literature. This study provides insights into the development of advanced label materials and an ultrasensitive LFIA for future bioassay applications.
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Affiliation(s)
- Fang Gao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Chang Lei
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Yang Liu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, P. R. China
| | - Hao Song
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Yueqi Kong
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jingjing Wan
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, P. R. China
| | - Chengzhong Yu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, P. R. China
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11
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M. Ways TM, Ng KW, Lau WM, Khutoryanskiy VV. Silica Nanoparticles in Transmucosal Drug Delivery. Pharmaceutics 2020; 12:E751. [PMID: 32785148 PMCID: PMC7465701 DOI: 10.3390/pharmaceutics12080751] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 07/27/2020] [Accepted: 08/06/2020] [Indexed: 02/06/2023] Open
Abstract
Transmucosal drug delivery includes the administration of drugs via various mucous membranes, such as gastrointestinal, nasal, ocular, and vaginal mucosa. The use of nanoparticles in transmucosal drug delivery has several advantages, including the protection of drugs against the harsh environment of the mucosal lumens and surfaces, increased drug residence time, and enhanced drug absorption. Due to their relatively simple synthetic methods for preparation, safety profile, and possibilities of surface functionalisation, silica nanoparticles are highly promising for transmucosal drug delivery. This review provides a description of silica nanoparticles and outlines the preparation methods for various core and surface-functionalised silica nanoparticles. The relationship between the functionalities of silica nanoparticles and their interactions with various mucous membranes are critically analysed. Applications of silica nanoparticles in transmucosal drug delivery are also discussed.
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Affiliation(s)
- Twana Mohammed M. Ways
- Reading School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, UK;
- College of Pharmacy, University of Sulaimani, Sulaimani 46001, Iraq
| | - Keng Wooi Ng
- School of Pharmacy, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK; (K.W.N.); (W.M.L.)
| | - Wing Man Lau
- School of Pharmacy, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK; (K.W.N.); (W.M.L.)
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12
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Leichner C, Jelkmann M, Bernkop-Schnürch A. Thiolated polymers: Bioinspired polymers utilizing one of the most important bridging structures in nature. Adv Drug Deliv Rev 2019; 151-152:191-221. [PMID: 31028759 DOI: 10.1016/j.addr.2019.04.007] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 04/16/2019] [Accepted: 04/16/2019] [Indexed: 12/13/2022]
Abstract
Thiolated polymers designated "thiomers" are obtained by covalent attachment of thiol functionalities on the polymeric backbone of polymers. In 1998 these polymers were first described as mucoadhesive and in situ gelling compounds forming disulfide bonds with cysteine-rich substructures of mucus glycoproteins and crosslinking through inter- and intrachain disulfide bond formation. In the following, it was shown that thiomers are able to form disulfides with keratins and membrane-associated proteins exhibiting also cysteine-rich substructures. Furthermore, permeation enhancing, enzyme inhibiting and efflux pump inhibiting properties were demonstrated. Because of these capabilities thiomers are promising tools for drug delivery guaranteeing a strongly prolonged residence time as well as sustained release on mucosal membranes. Apart from that, thiomers are used as drugs per se. In particular, for treatment of dry eye syndrome various thiolated polymers are in development and a first product has already reached the market. Within this review an overview about the thiomer-technology and its potential for different applications is provided discussing especially the outcome of studies in non-rodent animal models and that of numerous clinical trials. Moreover, an overview on product developments is given.
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13
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Application of a novel bi-functional nanoadsorbent for the simultaneous removal of inorganic and organic compounds: Equilibrium, kinetic and thermodynamic studies. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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14
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Hu TM, Lin CY, Wu MJ. Kinetics of fluoride-catalysed synthesis of organosilica colloids in aqueous solutions of amphiphiles. RSC Adv 2019; 9:28028-28037. [PMID: 35530447 PMCID: PMC9070784 DOI: 10.1039/c9ra05509f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 08/29/2019] [Indexed: 01/15/2023] Open
Abstract
Reactions involving hydrophobic reactants in water can be much accelerated in organic solvent-free solutions containing amphiphiles at neutral pH and room temperature. Previously, we demonstrated that organosilica colloidal particles could be conveniently synthesized by a versatile salt-catalysis method in solutions modified with various amphiphilic molecules. The method precludes the use of any solvent, any added form of energy (thermal or mechanical), and any strong (or hazardous) acids/bases. Herein, the kinetic properties of the reaction were systematically investigated for fluoride-catalysed synthesis of colloidal organosilica from a thiol-functionalized organosilane precursor, (3-mercaptopropyl)trimethoxysilane. Continuous, real-time ATR-FTIR measurements allowed probing the time evolution of organosilica condensation in different reaction systems, containing one of the following: non-ionic surfactants (Tween 20, Tween 40, Tween 60, Tween 80, Triton X-100), anionic surfactant (sodium dodecyl sulphate; SDS), cationic surfactant (cetyltrimethylammonium bromide; CTAB), and amphiphilic polymers (polyvinyl alcohol and polyvinylpyrrolidone). Overall, while some amphiphile-specific properties were revealed, fluoride-catalysed synthesis was ultrafast with a universal two-phase kinetic scheme (e.g. transition within 5–10 min) for all amphiphiles studied. Systematic real-time ATR-FTIR studies reveal ultrafast two-phase kinetics of sodium fluoride-catalysed synthesis of organosilica colloids in purely aqueous, amphiphile-assisted systems.![]()
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Affiliation(s)
- Teh-Min Hu
- Faculty of Pharmacy
- School of Pharmaceutical Sciences
- National Yang-Ming University
- Taipei 112
- Taiwan
| | - Chien-Yu Lin
- Faculty of Pharmacy
- School of Pharmaceutical Sciences
- National Yang-Ming University
- Taipei 112
- Taiwan
| | - Meng-Ju Wu
- Faculty of Pharmacy
- School of Pharmaceutical Sciences
- National Yang-Ming University
- Taipei 112
- Taiwan
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15
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Ahmed E, Kalathil S, Shi L, Alharbi O, Wang P. Synthesis of ultra-small platinum, palladium and gold nanoparticles by Shewanella loihica PV-4 electrochemically active biofilms and their enhanced catalytic activities. JOURNAL OF SAUDI CHEMICAL SOCIETY 2018. [DOI: 10.1016/j.jscs.2018.02.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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16
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Su YL, Lin CY, Chiu SJ, Hu TM. Formation of organosilica nanoparticles with dual functional groups and simultaneous payload entrapment. J Microencapsul 2018; 35:381-391. [PMID: 30086674 DOI: 10.1080/02652048.2018.1508314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
A mixed organosilane system for simultaneous formation of organosilica nanoparticles has been systematically studied for loading of various compounds with a wide range of log P values. The molecule-entrapping system was understood by investigating the effects of adjusting various experimental parameters on particle formation and molecule entrapment. Particularly, rhodamine 6 G (R6G) loaded colloidal particles were prepared and characterised in detail. The results show that whereas most molecules had entrapment efficiency (EE%) in the range of 20-80%, R6G exhibited near 100% efficiency. Moreover, the colloidal system can be tuned to incorporate R6G with the extent of entrapment spanning at least 2 orders of magnitude (i.e. from 0.04 to 4 mg) and a maximum EE% of 98%. In conclusion, the study demonstrates the promise of the proposed mixed organosilane system in forming colloidal particles containing multiple functional groups with selective loading of highly hydrophobic molecules.
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Affiliation(s)
- Ya-Ling Su
- a School of Pharmacy , Taipei Medical University , Taipei , Taiwan
| | - Chien-Yu Lin
- b Faculty of Pharmacy , National Yang-Ming University , Taipei , Taiwan
| | - Shih-Jiuan Chiu
- a School of Pharmacy , Taipei Medical University , Taipei , Taiwan
| | - Teh-Min Hu
- b Faculty of Pharmacy , National Yang-Ming University , Taipei , Taiwan
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17
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A pH stimuli thiol modified mesoporous silica nanoparticles: Doxorubicin carrier for cancer therapy. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2018.03.048] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Lin SY, Wang MR, Chiu SJ, Lin CY, Hu TM. S-Nitrosothiols (SNO) as light-responsive molecular activators for post-synthesis fluorescence augmentation in fluorophore-loaded nanospheres. J Mater Chem B 2018; 6:153-164. [DOI: 10.1039/c7tb02233f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
For the first time S-nitrosothiol is engineered into fluorophore-loaded silica nanospheres for post-synthesis, light-triggered fluorescence augmentation.
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Affiliation(s)
- Shu-Yi Lin
- School of Pharmacy, National Defense Medical Center
- Taipei
- Republic of China
| | - Meng-Ren Wang
- School of Pharmacy, National Defense Medical Center
- Taipei
- Republic of China
| | - Shih-Jiuan Chiu
- School of Pharmacy, Taipei Medical University
- Taipei
- Republic of China
| | - Chien-Yu Lin
- Faculty of Pharmacy, School of Pharmaceutical Sciences, National Yang-Ming University
- Taipei
- Republic of China
| | - Teh-Min Hu
- School of Pharmacy, National Defense Medical Center
- Taipei
- Republic of China
- Faculty of Pharmacy, School of Pharmaceutical Sciences, National Yang-Ming University
- Taipei
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19
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Lo CH, Hu TM. From a silane monomer to anisotropic buckled silica nanospheres: a polymer-mediated, solvent-free and one-pot synthesis. SOFT MATTER 2017; 13:5950-5960. [PMID: 28770266 DOI: 10.1039/c7sm01043e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The morphology of particles, along with other particle attributes, has been shown to affect the biological fate of particles administered into the body. Particles with collapsed surfaces or shells (dimpled, buckled or crumpled) can have different appearances, under the microscope, that resemble many things encountered in our daily life, such as apples/cherries, doughnuts, and bowls. Recent studies have demonstrated that they are not just particles with interesting geometries, but they can also be used as functional blocks for assembled complex materials. Since previous research focus has been on micron-sized particles and organic solvents were often used, it is of particular interest to synthesize the nanosized counterpart with a buckled surface using a purely aqueous method. Herein we report a facile method for rapid synthesis of buckled silica nanoparticles (SiNPs) based on S-nitrosothiol chemistry in a solvent-free reaction. 3-Mercaptopropyl trimethoxysilane (MPTMS) was used as a single silane source in a one-pot aqueous solution containing sodium nitrite and polyvinyl alcohol (PVA). Upon the addition of HCl, S-nitrosation and condensation of MPTMS occur simultaneously and the reaction system undergoes a rapid transition from a clear solution to a solution containing nanoparticles with a lag time controlled mainly by the amount of HCl added. The experimental parameters were systematically studied to determine the optimal concentration of each component. For a typical reaction, sub-100 nm nanoparticles can be produced in less than 1 h, and the best result can be obtained within 2 to 4 h. Remarkably, the nanoparticle exhibits buckled surface morphologies under TEM and SEM. The average size is about 60 nm in diameter. Moreover, the solid-state Si-NMR data show that T2 and T3 silicon species are rapidly evolved with slight dynamic changes over the reaction time. Further, PVA is shown to control the surface buckling as well as to stabilize the formed particles. The as-prepared SiNPs can be used as a nitric oxide (NO) carrier with the potential to release NO in an apparent zero-order manner. In conclusion, the study demonstrates the feasibility of employing an aqueous route for efficiently preparing SiNPs with multifarious surface cavities based on S-nitrosothiol chemistry.
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Affiliation(s)
- Chih-Hui Lo
- School of Pharmacy, National Defense Medical Center, Taipei 11490, Taiwan
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Vlasova N, Sorokin M, Oborina E. Carbofunctional sulfur-containing organosilicon compounds. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3668] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- N.N. Vlasova
- A. E. Favorsky Irkutsk Institute of Chemistry; SB RAS; 1 Favorsky Street Irkutsk 664033 Russia
| | - M.S. Sorokin
- A. E. Favorsky Irkutsk Institute of Chemistry; SB RAS; 1 Favorsky Street Irkutsk 664033 Russia
| | - E.N. Oborina
- A. E. Favorsky Irkutsk Institute of Chemistry; SB RAS; 1 Favorsky Street Irkutsk 664033 Russia
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Vlasova NN, Sorokin MS, Oborina EN. Carbofunctional sulfur-containing organosilicon compounds: Synthesis and application fields. RUSS J APPL CHEM+ 2016. [DOI: 10.1134/s1070427216070016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chiu SJ, Lin CY, Chou HC, Hu TM. Silica Ouzo Effect: Amphiphilic Drugs Facilitate Nanoprecipitation of Polycondensed Mercaptosilanes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:211-220. [PMID: 26673354 DOI: 10.1021/acs.langmuir.5b04048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Amphiphilic drugs are therapeutic agents whose molecular structures contain both hydrophobic and hydrophilic portions. Here we report a systematic study on how amphiphilic drugs can assist in silica nanoprecipitation. 3-Mercaptopropyltrimethoxysilane (MPTMS) was used as the sole silica material and 12 amphiphilic drugs spanning a wide spectrum of therapeutic categories were included. MPTMS polycondensation was conducted in a DMSO-based organic phase. After a sufficient time, particle formation was induced by injecting a small amount of the organic phase into a water solution containing various amphiphiles. The results show that all amphiphilic drugs studied exerted concentration-dependent facilitating effect on nanoparticle formation. Under certain preparation conditions, the particle solution showed physical stability over a long period and the formed particles could be as small as 100 nm. By systematically varying drug concentrations and injection volumes, the ability of each amphiphile to promote nanoprecipitation can be quantified and compared, based on two novel indices: the area under the critical volume-concentration curve (AUC) and the critical stabilization concentration (CSC). We demonstrate that both ability indices significantly correlated with the drug's log P and critical micelle concentrations (CMC). Furthermore, we have optimized the aging and particle purification condition and extensively characterized our system through comprehensive TEM and zeta-potential measurements, as well as determinations for drug entrapment and release. In conclusion, we have established a quantitative structure-activity relationship for amphiphilic small-molecular drugs in their ability to interact with poly(mercaptopropyl)silsesquioxane species and form nanoparticles via solvent shifting. We speculate that both hydrophobic and electrostatic interactions play important roles in the formation and stabilization of nanoparticles.
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Affiliation(s)
- Shih-Jiuan Chiu
- College of Pharmacy, Taipei Medical University , Taipei 11031, Taiwan, ROC
| | - Chien-Yu Lin
- College of Pharmacy, Taipei Medical University , Taipei 11031, Taiwan, ROC
- School of Pharmacy, National Defense Medical Center , Taipei 11490, Taiwan, ROC
| | - Hung-Chang Chou
- School of Pharmacy, National Defense Medical Center , Taipei 11490, Taiwan, ROC
| | - Teh-Min Hu
- School of Pharmacy, National Defense Medical Center , Taipei 11490, Taiwan, ROC
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Hu Y, Ge L, Han J, Guo R. Concentration and temperature induced dual-responsive wormlike micelle to hydrogel transition in ionic liquid-type surfactant [C₁₆imC₉]Br aqueous solution without additives. SOFT MATTER 2015; 11:5624-31. [PMID: 26059909 DOI: 10.1039/c5sm01084e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A highly viscoelastic fluid formed by the ionic liquid-type surfactant 1-hexadecyl-3-nonyl imidazolium bromide ([C16imC9]Br) in water in the absence of any additive was studied. The phase behavior and morphology of aggregates were studied by a combination of rheological techniques, small-angle X-ray scattering (SAXS), cryo-etch-scanning electron microscopy (cryo-etch-SEM) and freeze-fractured transmission electron microscopy (FF-TEM). [C16imC9]Br aqueous solutions showed interesting rheological behavior as a function of both concentration and temperature, which invoked a transition between wormlike micelles and hydrogels. With the increase in [C16imC9]Br concentration, the aqueous solution could form viscoelastic wormlike micelles (50-80 mM), hydrogels (90-110 mM) and wormlike micelles (120-180 mM). As the temperature increased, the hydrogels (90-110 mM) could also transit to wormlike micelles. The unusual phase transition between wormlike micelles and elastic hydrogels was postulated to be the change of the average micellar length.
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Affiliation(s)
- Yimin Hu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, P. R. China.
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