1
|
Vecchio G, Darcos V, Grill SL, Brouillet F, Coppel Y, Duttine M, Pugliara A, Combes C, Soulié J. Spray-dried ternary bioactive glass microspheres: Direct and indirect structural effects of copper-doping on acellular degradation behavior. Acta Biomater 2024; 181:453-468. [PMID: 38723927 DOI: 10.1016/j.actbio.2024.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/16/2024] [Accepted: 05/01/2024] [Indexed: 05/19/2024]
Abstract
Silicate-based bioactive glass nano/microspheres hold significant promise for bone substitution by facilitating osteointegration through the release of biologically active ions and the formation of a biomimetic apatite layer. Cu-doping enhances properties such as pro-angiogenic and antibacterial behavior. While sol-gel methods usually yield homogeneous spherical particles for pure silica or binary glasses, synthesizing poorly aggregated Cu-doped ternary glass nano/microparticles without a secondary CuO crystalline phase remains challenging. This article introduces an alternative method for fabricating Cu-doped ternary microparticles using sol-gel chemistry combined with spray-drying. The resulting microspheres exhibit well-defined, poorly aggregated particles with spherical shapes and diameters of a few microns. Copper primarily integrates into the microspheres as Cu0 nanoparticles and as Cu2+ within the amorphous network. This doping affects silica network connectivity, as calcium and phosphorus are preferentially distributed in the glass network (respectively as network modifiers and formers) or involved in amorphous calcium phosphate nano-domains depending on the doping rate. These differences affect the interaction with simulated body fluid. Network depolymerization, ion release (SiO44-, Ca2+, PO43-, Cu2+), and apatite nanocrystal layer formation are impacted, as well as copper release. The latter is mainly provided by the copper involved in the silica network and not from metal nanoparticles, most of which remain in the microspheres after interaction. This understanding holds promising implications for potential therapeutic applications, offering possibilities for both short-term and long-term delivery of a tunable copper dose. STATEMENT OF SIGNIFICANCE: A novel methodology, scalable to industrial levels, enables the synthesis of copper-doped ternary bioactive glass microparticles by combining spray-drying and sol-gel chemistry. It provides precise control over the copper percentage in microspheres. This study explores the influence of synthesis conditions on the copper environment, notably Cu0 and Cu2+ ratios, characterized by EPR spectroscopy, an aspect poorly described for copper-doped bioactive glass. Additionally, copper indirectly affects silica network connectivity and calcium/phosphorus distribution, as revealed by SSNMR. Multiscale characterization illustrates how these features impact acellular degradation in simulated body fluid, highlighting the therapeutic potential for customizable copper dosing to address short- and long-term needs.
Collapse
Affiliation(s)
- Gabriele Vecchio
- Institut des Biomolécules Max Mousseron (IBMM), University of Montpellier, CNRS, ENSCM, 34293 Montpellier, France; CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 31030 Toulouse, France
| | - Vincent Darcos
- Institut des Biomolécules Max Mousseron (IBMM), University of Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Sylvain Le Grill
- CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 31030 Toulouse, France
| | - Fabien Brouillet
- CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 31030 Toulouse, France
| | - Yannick Coppel
- Laboratoire de Chimie de Coordination (LCC), Université de Toulouse, CNRS, UPR 8241, Université Toulouse 3 - Paul Sabatier, Toulouse 31077, France
| | - Mathieu Duttine
- Université de Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, Pessac F-33600, France
| | - Alessandro Pugliara
- CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 31030 Toulouse, France; Centre de MicroCaractérisation Raimond Castaing, Université Toulouse 3 - Paul Sabatier, Toulouse INP, INSA Toulouse, CNRS, 31400 Toulouse, France
| | - Christèle Combes
- CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 31030 Toulouse, France
| | - Jérémy Soulié
- CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 31030 Toulouse, France.
| |
Collapse
|
2
|
Ozawa K, Adachi M, Sugimoto H, Fujii M. Photoluminescence from FRET pairs coupled with Mie-resonant silicon nanospheres. NANOSCALE 2024; 16:4039-4046. [PMID: 38344928 DOI: 10.1039/d3nr06290b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Optically resonant nanoparticles decorated with donor-acceptor molecular pairs have been attracting attention for applications as nanoprobes in bioimaging and biosensing. We produced composite nanoparticles composed of donor-acceptor molecular pairs and silicon nanospheres (Si NSs) with diameters of 100-200 nm exhibiting Mie resonances in the visible range and studied the effect of Mie resonances on their photoluminescence properties. We showed that the photoluminescence spectra are strongly modified by Mie resonances and the spectral shape is controlled in a wide range by the Si NS size; by controlling the size, we can achieve the photoluminescence maximum from that of a donor molecule to that of an acceptor molecule almost continuously. From the photoluminescence decay properties in combination with theoretical calculations, we showed that the observed strong modification of the spectral shape is mainly due to the Purcell effect on donor and acceptor molecules, and the effect of Mie resonances on the Förster resonance energy transfer (FRET) rate is relatively small. We also showed that because of the large Purcell effect and the small FRET rate enhancement, Mie resonances decrease the FRET efficiency.
Collapse
Affiliation(s)
- Keisuke Ozawa
- Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan.
| | - Masato Adachi
- Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan.
| | - Hiroshi Sugimoto
- Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan.
| | - Minoru Fujii
- Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan.
| |
Collapse
|
3
|
Sainz-Menchón M, González de Arrieta I, Zaki A, Fayon F, López GA. Structural Unit Determination in Silica Nanoparticles Using Infrared Micro-Reflectance Spectroscopy. APPLIED SPECTROSCOPY 2024; 78:209-216. [PMID: 38130116 DOI: 10.1177/00037028231218289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
A method based on infrared (IR) micro-reflectance measurements for the structural characterization of glassy nanomaterials is presented. Near-specular reflectance spectra of pressed pellets can be analyzed using a model relating the structure of silicate glasses to their dielectric response and an effective medium approximation to account for the effect of porosity. The integrated intensities of phenomenological bands attributed to Q 2 , Q 3 , and Q 4 structural units allow quantifying their relative populations. These values are in good agreement with those obtained with magic-angle spinning nuclear magnetic resonance, which serves as validation of the method and proves the feasibility of extracting quantitative information about glass structure from IR micro-reflectance experiments.
Collapse
Affiliation(s)
| | - Iñigo González de Arrieta
- Physics Department, University of the Basque Country (UPV/EHU), Leioa, Spain
- CNRS, CEMHTI UPR3079, Universitė Orléans, Orléans, France
| | - Abdelali Zaki
- CNRS, CEMHTI UPR3079, Universitė Orléans, Orléans, France
- CNRS, Laboratoire SPMS, CentraleSupélec, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Franck Fayon
- CNRS, CEMHTI UPR3079, Universitė Orléans, Orléans, France
| | - Gabriel A López
- Physics Department, University of the Basque Country (UPV/EHU), Leioa, Spain
| |
Collapse
|
4
|
Cho HS, Noh MS, Kim YH, Namgung J, Yoo K, Shin MS, Yang CH, Kim YJ, Yu SJ, Chang H, Rho WY, Jun BH. Recent Studies on Metal-Embedded Silica Nanoparticles for Biological Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:268. [PMID: 38334538 PMCID: PMC10856399 DOI: 10.3390/nano14030268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 01/18/2024] [Accepted: 01/23/2024] [Indexed: 02/10/2024]
Abstract
Recently, silica nanoparticles (NPs) have attracted considerable attention as biocompatible and stable templates for embedding noble metals. Noble-metal-embedded silica NPs utilize the exceptional optical properties of novel metals while overcoming the limitations of individual novel metal NPs. In addition, the structure of metal-embedded silica NPs decorated with small metal NPs around the silica core results in strong signal enhancement in localized surface plasmon resonance and surface-enhanced Raman scattering. This review summarizes recent studies on metal-embedded silica NPs, focusing on their unique designs and applications. The characteristics of the metal-embedded silica NPs depend on the type and structure of the embedded metals. Based on this progress, metal-embedded silica NPs are currently utilized in various spectroscopic applications, serving as nanozymes, detection and imaging probes, drug carriers, photothermal inducers, and bioactivation molecule screening identifiers. Owing to their versatile roles, metal-embedded silica NPs are expected to be applied in various fields, such as biology and medicine, in the future.
Collapse
Affiliation(s)
- Hye-Seong Cho
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea; (H.-S.C.); (Y.-H.K.); (J.N.); (K.Y.); (M.-S.S.); (C.-H.Y.); (Y.J.K.)
| | - Mi Suk Noh
- Bio & Medical Research Center, Bio Business Division, Korea Testing Certification, Gunpo 15809, Gyeonggi-do, Republic of Korea;
| | - Yoon-Hee Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea; (H.-S.C.); (Y.-H.K.); (J.N.); (K.Y.); (M.-S.S.); (C.-H.Y.); (Y.J.K.)
| | - Jayoung Namgung
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea; (H.-S.C.); (Y.-H.K.); (J.N.); (K.Y.); (M.-S.S.); (C.-H.Y.); (Y.J.K.)
| | - Kwanghee Yoo
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea; (H.-S.C.); (Y.-H.K.); (J.N.); (K.Y.); (M.-S.S.); (C.-H.Y.); (Y.J.K.)
| | - Min-Sup Shin
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea; (H.-S.C.); (Y.-H.K.); (J.N.); (K.Y.); (M.-S.S.); (C.-H.Y.); (Y.J.K.)
| | - Cho-Hee Yang
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea; (H.-S.C.); (Y.-H.K.); (J.N.); (K.Y.); (M.-S.S.); (C.-H.Y.); (Y.J.K.)
| | - Young Jun Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea; (H.-S.C.); (Y.-H.K.); (J.N.); (K.Y.); (M.-S.S.); (C.-H.Y.); (Y.J.K.)
| | - Seung-Ju Yu
- Graduate School of Integrated Energy-AI, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Republic of Korea;
| | - Hyejin Chang
- Division of Science Education, Kangwon National University, Chuncheon 24341, Republic of Korea;
| | - Won Yeop Rho
- Graduate School of Integrated Energy-AI, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Republic of Korea;
| | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Republic of Korea; (H.-S.C.); (Y.-H.K.); (J.N.); (K.Y.); (M.-S.S.); (C.-H.Y.); (Y.J.K.)
| |
Collapse
|
5
|
Kaewchuchuen J, Matthew SAL, Phuagkhaopong S, Bimbo LM, Seib FP. Functionalising silk hydrogels with hetero- and homotypic nanoparticles. RSC Adv 2024; 14:3525-3535. [PMID: 38259992 PMCID: PMC10801455 DOI: 10.1039/d3ra07634b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 01/02/2024] [Indexed: 01/24/2024] Open
Abstract
Despite many reports detailing silk hydrogels, the development of composite silk hydrogels with homotypic and heterotypic silk nanoparticles and their impact on material mechanics and biology have remained largely unexplored. We hypothesise that the inclusion of nanoparticles into silk-based hydrogels enables the formation of homotropic and heterotropic material assemblies. The aim was to explore how well these systems allow tuning of mechanics and cell adhesion to ultimately control the cell-material interface. We utilised nonporous silica nanoparticles as a standard reference and compared them to nanoparticles derived from Bombyx mori silk and Antheraea mylitta (tasar) silk (approximately 100-150 nm in size). Initially, physically cross-linked B. mori silk hydrogels were prepared containing silica, B. mori silk nanoparticles, or tasar silk nanoparticles at concentrations of either 0.05% or 0.5% (w/v). The initial modulus (stiffness) of these nanoparticle-functionalised silk hydrogels was similar. Stress relaxation was substantially faster for nanoparticle-modified silk hydrogels than for unmodified control hydrogels. Increasing the concentrations of B. mori silk and silica nanoparticles slowed stress relaxation, while the opposite trend was observed for hydrogels modified with tasar nanoparticles. Cell attachment was similar for all hydrogels, but proliferation during the initial 24 h was significantly improved with the nanoparticle-modified hydrogels. Overall, this study demonstrates the manufacture and utilisation of homotropic and heterotropic silk hydrogels.
Collapse
Affiliation(s)
- Jirada Kaewchuchuen
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde 161 Cathedral Street Glasgow G4 0RE UK
| | - Saphia A L Matthew
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde 161 Cathedral Street Glasgow G4 0RE UK
| | - Suttinee Phuagkhaopong
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde 161 Cathedral Street Glasgow G4 0RE UK
- Department of Pharmacology, Faculty of Medicine, Chulalongkorn University Bangkok Thailand
| | - Luis M Bimbo
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde 161 Cathedral Street Glasgow G4 0RE UK
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Coimbra 3000-548 Coimbra Portugal
- CNC - Center for Neuroscience and Cell Biology, Rua Larga, University of Coimbra 3004-504 Coimbra Portugal
- CIBB - Center for Innovative Biomedicine and Biotechnology, Rua Larga, University of Coimbra 3004-504 Coimbra Portugal
| | - F Philipp Seib
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde 161 Cathedral Street Glasgow G4 0RE UK
- Fraunhofer Institute for Molecular Biology & Applied Ecology Branch Bioresources, Ohlebergsweg 12 35392 Giessen Germany
- Friedrich Schiller University Jena, Institute of Pharmacy Lessingstr. 8 07743 Jena Germany +49 3641 9 499 00
| |
Collapse
|
6
|
Harrop ACF, Tupally KR, Pandey P, Parekh HS. Opportunities for Bioactive Glass in Gastrointestinal Conditions: A Review of Production Methodologies, Morphology, Composition, and Performance. Mol Pharm 2023; 20:5954-5980. [PMID: 37962352 DOI: 10.1021/acs.molpharmaceut.3c00188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Bioactive glasses (BGs) are widely used in orthopedic and dental applications for their ability to stimulate endogenous bone formation and regeneration. BG applications more recently broadened to include soft tissue conditions, based on their ability to stimulate angiogenesis, soft tissue regeneration, and wound healing. Sol-gel synthesis has helped facilitate this expansion, allowing formulators to tailor the morphological characteristics of the BG matrix. The effectiveness of BGs in skin wound healing is viewed as a gateway for their use as both a therapeutic and drug delivery platform in other soft tissue applications, notably gastrointestinal (GI) applications, which form the focus of this review. Recent changes in international guidelines for GI conditions shifted clinical objectives from symptom management to mucosal wound healing. The additional scrutiny of proton pump inhibitor (PPI) safety, increasing burden of disease, and financial costs associated with gastroesophageal reflux disease (GERD), peptic ulcer disease (PUD), and inflammatory bowel disease (IBD) open new clinical possibilities for BG. This narrative literature review intersects materials engineering, formulation science, and clinical practice, setting it apart from prior literature. Broadly, current evidence for BG applications in GI conditions is sparse and under-developed, which this review directly addresses. It explores and synthesizes evidence that supports the potential use of sol-gel-derived BG for the efficacious treatment of soft tissue applications, with specific reference to GI conditions. An overview with comparative analysis of current BG synthesis techniques and associated challenges is presented, and influences of composition, biologically active ions, and morphological characteristics in soft tissue applications are explored. To contextualize this, sol-gel-derived BGs are proposed as a dual, tailorable therapeutic and drug delivery platform for upper and lower GI conditions. Future directions for this largely untapped area of translational research are also proposed, based on extant literature.
Collapse
Affiliation(s)
- Angus C F Harrop
- The University of Queensland, School of Pharmacy, The Pharmacy Australia Centre of Excellence, 20 Cornwall St, Woolloongabba, Queensland 4102, Australia
| | - Karnaker R Tupally
- The University of Queensland, School of Pharmacy, The Pharmacy Australia Centre of Excellence, 20 Cornwall St, Woolloongabba, Queensland 4102, Australia
| | - Preeti Pandey
- The University of Queensland, School of Pharmacy, The Pharmacy Australia Centre of Excellence, 20 Cornwall St, Woolloongabba, Queensland 4102, Australia
| | - Harendra S Parekh
- The University of Queensland, School of Pharmacy, The Pharmacy Australia Centre of Excellence, 20 Cornwall St, Woolloongabba, Queensland 4102, Australia
| |
Collapse
|
7
|
Vergnaud F, Mekonnen B, El Abbassi A, Vichery C, Nedelec JM. Correlating the Effect of Composition and Textural Properties on Bioactivity for Pristine and Copper-Doped Binary Mesoporous Bioactive Glass Nanoparticles. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6690. [PMID: 37895672 PMCID: PMC10608725 DOI: 10.3390/ma16206690] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/09/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023]
Abstract
Multifunctional substitutes for bone tissue engineering have gained significant interest in recent years in the aim to address the clinical challenge of treating large bone defects resulting from surgical procedures. Sol-gel mesoporous bioactive glass nanoparticles (MBGNs) have emerged as a promising solution due to their high reactivity and versatility. The effect of calcium content on MBGNs textural properties is well known. However, the relationship between their composition, textural properties, and reactivity has not yet been thoroughly discussed in existing studies, leading to divergent conclusions. In this study, pristine and copper-doped binary MGBNs were synthesized by a modified Stöber method, using a cationic surfactant as pore-templating agent. An opposite evolution between calcium content (12-26 wt%) and specific surface area (909-208 m2/g) was evidenced, while copper introduction (8.8 wt%) did not strongly affect the textural properties. In vitro bioactivity assessments conducted in simulated body fluid (SBF) revealed that the kinetics of hydroxyapatite (HAp) crystallization are mainly influenced by the specific surface area, while the composition primarily controls the quantity of calcium phosphate produced. The MBGNs exhibited a good bioactivity within 3 h, while Cu-MBGNs showed HAp crystallization after 48 h, along with a controlled copper release (up to 84 ppm at a concentration of 1 mg/mL). This comprehensive understanding of the interplay between composition, textural properties, and bioactivity, offers insights for the design of tailored MBGNs for bone tissue regeneration with additional biological and antibacterial effects.
Collapse
Affiliation(s)
| | | | | | - Charlotte Vichery
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, ICCF, F-63000 Clermont-Ferrand, France
| | | |
Collapse
|
8
|
Sánchez-Salcedo S, Heras C, Lozano D, Vallet-Regí M, Salinas AJ. Nanodevices based on mesoporous glass nanoparticles enhanced with zinc and curcumin to fight infection and regenerate bone. Acta Biomater 2023; 166:655-669. [PMID: 37142110 DOI: 10.1016/j.actbio.2023.04.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 04/25/2023] [Accepted: 04/28/2023] [Indexed: 05/06/2023]
Abstract
Nanotechnology-based approaches are emerging as promising strategies to treat different bone pathologies such as infection, osteoporosis or cancer. To this end, several types of nanoparticles are being investigated, including those based on mesoporous bioactive glasses (MGN) which exhibit exceptional structural and textural properties and whose biological behaviour can be improved by including therapeutic ions in their composition and loading them with biologically active substances. In this study, the bone regeneration capacity and antibacterial properties of MGNs in the SiO2-CaO-P2O5 system were evaluated before and after being supplemented with 2.5% or 4% ZnO and loaded with curcumin. in vitro studies with preosteoblastic cells and mesenchymal stem cells allowed determining the biocompatible MGNs concentrations range. Moreover, the bactericidal effect of MGNs with zinc and curcumin against S. aureus was demonstrated, as a significant reduction of bacterial growth was detected in both planktonic and sessile states and the degradation of a pre-formed bacterial biofilm in the presence of the nanoparticles also occurred. Finally, MC3T3-E1 preosteoblastic cells and S. aureus were co-cultured to investigate competitive colonisation between bacteria and cells in the presence of the MGNs. Preferential colonisation and survival of osteoblasts and effective inhibition of both bacterial adhesion and biofilm formation of S. aureus in the co-culture system were detected. Our study demonstrated the synergistic antibacterial effect of zinc ions combined with curcumin and the enhancement of the bone regeneration characteristics of MGNs containing zinc and curcumin to obtain systems capable of simultaneously promoting bone regeneration and controlling infection. STATEMENT OF SIGNIFICANCE: In search of a new approach to regenerate bone and fight infections, a nanodevice based on mesoporous SiO2-CaO-P2O5 glass nanoparticles enriched with Zn2+ ions and loaded with curcumin was designed. This study demonstrates the synergistic effect of the simultaneous presence of zinc ions and curcumin in the nanoparticles that significantly reduces the bacterial growth in planktonic state and is capable to degrade pre-formed S. aureus biofilms whereas the nanosystem exhibits a cytocompatible behaviour in the presence of preosteoblasts and mesenchymal stem cells. Based on these results, the designed nanocarrier represents a promising alternative for the treatment of acute and chronic infections in bone tissues, while avoiding the significant current problem of bacterial resistance to antibiotics.
Collapse
Affiliation(s)
- Sandra Sánchez-Salcedo
- Dpt. Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de octubre, imas12; Plaza Ramón y Cajal s/n, 28040 Madrid, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain.
| | - Clara Heras
- Dpt. Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de octubre, imas12; Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
| | - Daniel Lozano
- Dpt. Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de octubre, imas12; Plaza Ramón y Cajal s/n, 28040 Madrid, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain
| | - María Vallet-Regí
- Dpt. Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de octubre, imas12; Plaza Ramón y Cajal s/n, 28040 Madrid, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain
| | - Antonio J Salinas
- Dpt. Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de octubre, imas12; Plaza Ramón y Cajal s/n, 28040 Madrid, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina, CIBER-BBN, Madrid, Spain.
| |
Collapse
|
9
|
Mohammed AA, Li S, Sang T, Jones JR, Pinna A. Nanocomposite Hydrogels with Polymer Grafted Silica Nanoparticles, Using Glucose Oxidase. Gels 2023; 9:486. [PMID: 37367156 PMCID: PMC10298067 DOI: 10.3390/gels9060486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 06/28/2023] Open
Abstract
Nanocomposite hydrogels offer remarkable potential for applications in bone tissue engineering. They are synthesized through the chemical or physical crosslinking of polymers and nanomaterials, allowing for the enhancement of their behaviour by modifying the properties and compositions of the nanomaterials involved. However, their mechanical properties require further enhancement to meet the demands of bone tissue engineering. Here, we present an approach to improve the mechanical properties of nanocomposite hydrogels by incorporating polymer grafted silica nanoparticles into a double network inspired hydrogel (gSNP Gels). The gSNP Gels were synthesised via a graft polymerization process using a redox initiator. gSNP Gels were formed by grafting 2-acrylamido-2-methylpropanesulfonic acid (AMPS) as the first network gel followed by a sequential second network acrylamide (AAm) onto amine functionalized silica nanoparticles (ASNPs). We utilized glucose oxidase (GOx) to create an oxygen-free atmosphere during polymerization, resulting in higher polymer conversion compared to argon degassing. The gSNP Gels showed excellent compressive strengths of 13.9 ± 5.5 MPa, a strain of 69.6 ± 6.4%, and a water content of 63.4% ± 1.8. The synthesis technique demonstrates a promising approach to enhance the mechanical properties of hydrogels, which can have significant implications for bone tissue engineering and other soft tissue applications.
Collapse
Affiliation(s)
- Ali A. Mohammed
- Dyson School of Design Engineering, Imperial College London, London SW7 9EG, UK;
- Department of Materials, Imperial College London, London SW7 2AZ, UK; (S.L.); (T.S.); (J.R.J.)
| | - Siwei Li
- Department of Materials, Imperial College London, London SW7 2AZ, UK; (S.L.); (T.S.); (J.R.J.)
| | - Tian Sang
- Department of Materials, Imperial College London, London SW7 2AZ, UK; (S.L.); (T.S.); (J.R.J.)
| | - Julian R. Jones
- Department of Materials, Imperial College London, London SW7 2AZ, UK; (S.L.); (T.S.); (J.R.J.)
| | - Alessandra Pinna
- Department of Materials, Imperial College London, London SW7 2AZ, UK; (S.L.); (T.S.); (J.R.J.)
- The Francis Crick Institute, London NW1 1AT, UK
- School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, London GU2 7XH, UK
| |
Collapse
|
10
|
Simila HO, Boccaccini AR. Sol-gel synthesis of lithium doped mesoporous bioactive glass nanoparticles and tricalcium silicate for restorative dentistry: Comparative investigation of physico-chemical structure, antibacterial susceptibility and biocompatibility. Front Bioeng Biotechnol 2023; 11:1065597. [PMID: 37077228 PMCID: PMC10106781 DOI: 10.3389/fbioe.2023.1065597] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 03/14/2023] [Indexed: 04/05/2023] Open
Abstract
Introduction: The sol-gel method for production of mesoporous bioactive glass nanoparticles (MBGNs) has been adapted to synthesize tricalcium silicate (TCS) particles which, when formulated with other additives, form the gold standard for dentine-pulp complex regeneration. Comparison of TCS and MBGNs obtained by sol-gel method is critical considering the results of the first ever clinical trials of sol-gel BAG as pulpotomy materials in children. Moreover, although lithium (Li) based glass ceramics have been long used as dental prostheses materials, doping of Li ion into MBGNs for targeted dental applications is yet to be investigated. The fact that lithium chloride benefits pulp regeneration in vitro also makes this a worthwhile undertaking. Therefore, this study aimed to synthesize TCS and MBGNs doped with Li by sol-gel method, and perform comparative characterizations of the obtained particles.Methods: TCS particles and MBGNs containing 0%, 5%, 10% and 20% Li were synthesized and particle morphology and chemical structure determined. Powder concentrations of 15mg/10 mL were incubated in artificial saliva (AS), Hank’s balanced saline solution (HBSS) and simulated body fluid (SBF), at 37°C for 28 days and pH evolution and apatite formation, monitored. Bactericidal effects against S. aureus and E. coli, as well as possible cytotoxicity against MG63 cells were also evaluated through turbidity measurements.Results: MBGNs were confirmed to be mesoporous spheres ranging in size from 123 nm to 194 nm, while TCS formed irregular nano-structured agglomerates whose size was generally larger and variable. From ICP-OES data, extremely low Li ion incorporation into MBGNs was detected. All particles had an alkalinizing effect on all immersion media, but TCS elevated pH the most. SBF resulted in apatite formation for all particle types as early as 3 days, but TCS appears to be the only particle to form apatite in AS at a similar period. Although all particles had an effect on both bacteria, this was pronounced for undoped MBGNs. Whereas all particles are biocompatible, MBGNs showed better antimicrobial properties while TCS particles were associated with greater bioactivity.Conclusion: Synergizing these effects in dental biomaterials may be a worthwhile undertaking and realistic data on bioactive compounds targeting dental application may be obtained by varying the immersion media.
Collapse
|
11
|
Coloma A, Velty A, Díaz U. Hybrid organic-inorganic nanoparticles with associated functionality for catalytic transformation of biomass substrates. RSC Adv 2023; 13:10144-10156. [PMID: 37006368 PMCID: PMC10061267 DOI: 10.1039/d3ra01486j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 03/25/2023] [Indexed: 04/04/2023] Open
Abstract
We present the one-pot synthesis of functionalized organosilica nanoparticles to generate multi-functional hybrid catalysts. Octadecyl, alkyl-thiol and alkyl-amino moieties were used separately and in different combinations, to generate different hybrid spherical nanoparticles with tunable acidic, basic and amphiphilic properties, covalently incorporating up to three organic functional elements onto the surface of the nanoparticles. Several parameters were optimised such as the concentration of the base employed during the hydrolysis and condensation synthesis process that showed a strong influence on the particle size. The physico-chemical properties of the hybrid materials were fully characterized by XRD, elemental and thermogravimetric analysis, electron microscopy, nitrogen adsorption isotherms and 13C and 29Si NMR spectroscopy. Finally, the potential uses of the prepared materials as amphiphilic catalysts, with acidic or basic properties for the conversion of biomass molecules into platform chemicals were evaluated.
Collapse
Affiliation(s)
- Alicia Coloma
- Instituto de Tecnología Química, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas 46022 Valencia Spain
| | - Alexandra Velty
- Instituto de Tecnología Química, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas 46022 Valencia Spain
| | - Urbano Díaz
- Instituto de Tecnología Química, Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas 46022 Valencia Spain
| |
Collapse
|
12
|
Naruphontjirakul P, Panpisut P, Patntirapong S. Zinc and Strontium-Substituted Bioactive Glass Nanoparticle/Alginate Composites Scaffold for Bone Regeneration. Int J Mol Sci 2023; 24:ijms24076150. [PMID: 37047122 PMCID: PMC10094307 DOI: 10.3390/ijms24076150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 03/14/2023] [Accepted: 03/21/2023] [Indexed: 04/14/2023] Open
Abstract
The global population is growing older and entering an aging society. Aging results in severe tissue disorder and organ dysfunction. Bone-related injuries are particularly significant. The need for alternative bone replacement materials for human implants has grown over the past few decades. Alginate has the potential for use as a cell scaffold for bone tissue engineering due to its high bio-compatibility. To improve the bioactivity of alginate scaffolds, zinc- and strontium-containing sol-gel-derived bioactive glass nanoparticles (Zn-Sr-BGNPs) with sizes ranging from 100 to l40 nm were incorporated. Zn-Sr-BGNPs synthesized through the sol-gel process have a high sur-face-to-volume ratio, homogeneity, and purity, resulting in faster degradation. The therapeutic bivalent ions released from Zn-Sr-BGNPs strengthen the cell scaffold and improve the stimulation of the production and development of bone cells. Zn-Sr-BGNPs with different Zn to Si nominal ratios of 0, 1, and 1.5 were mixed with alginate in this research. The ratio of Zn in Zn-Sr-BGNPs and the ratio of Zn-Sr-BGNPs in scaffolds impact the pore size, swelling, and biological properties of synthesized composite scaffolds. The surface area and pore volume of a 1:1 1Zn-Sr-BGNP:Alg composite scaffold were 22.58 m2/g and 0.055 cm3/g, respectively. The incorporation of Zn-Sr-BGNPs improved the mechanical performance of the scaffolds up to 4.73 ± 0.48 MPa. The swelling rate decreased slightly from 2.12 (pure Alg) to 1.50 (1Zn-Sr-BGNP:Alg (1:1)). The 1Zn-Sr-BGNP:Alg (1:1) composite scaffold promoted bioactivity through apatite layer formation, increased bone cell proliferation via the dissolution products released from the scaffold, enhanced calcium deposition, and facilitated cell attachment. Thus, 1Zn-Sr-BGNP:Alg (1:1) composite scaffold is proposed as a possible artificial bone scaffold in bone tissue regeneration.
Collapse
Affiliation(s)
- Parichart Naruphontjirakul
- Biological Engineering Program, Faculty of Engineering, King Mongkut's University of Technology Thonburi, 126 Pracha Uthit Rd., Bang Mod, Thung Khru, Bangkok 10140, Thailand
| | - Piyaphong Panpisut
- Faculty of Dentistry, Thammasat University, Pathum Thani 12120, Thailand
- Research Unit in Dental and Bone Substitute Biomaterials, Thammasat University, Pathum Thani 12120, Thailand
| | - Somying Patntirapong
- Faculty of Dentistry, Thammasat University, Pathum Thani 12120, Thailand
- Research Unit in Dental and Bone Substitute Biomaterials, Thammasat University, Pathum Thani 12120, Thailand
| |
Collapse
|
13
|
Qin X, Wang K, Cao P, Su Y, Chen S, Yu H, Quan X. Highly efficient electro-Fenton process on hollow porous carbon spheres enabled by enhanced H 2O 2 production and Fe 2+ regeneration. JOURNAL OF HAZARDOUS MATERIALS 2023; 446:130664. [PMID: 36584650 DOI: 10.1016/j.jhazmat.2022.130664] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/14/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
Electro-Fenton (e-Fenton) is a promising method for wastewater treatment that relies on powerful ·OH generated via the decomposition of electro-generated H2O2 catalyzed by Fe2+. In this regard, developing a catalyst capable of simultaneously producing H2O2 and accelerating Fe2+ regeneration is of considerable importance; however, this remains a challenge because of the difficulty in modulating the electronic microenvironment. Herein, a hollow porous carbon sphere catalyst (HPCS) is developed to synchronously enhance H2O2 generation and accelerate Fe3+/Fe2+ cycling by constructing an electron-rich microenvironment via surface curvature regulation. The Fe2+ regeneration efficiency reaches 35.5% on HPCS featuring a larger curvature structure (HPCS-TPOS), which is 1.6 times higher than the smaller curvature HPCS-S catalyst (22.8%). Density functional theory reveals that the electron-rich microenvironment on the outer surface of high curvature structure promotes Fe2+ regeneration. The H2O2 production rate on HPCS-TPOS is 47.2 mmol L-1 h-1, exceeding the state-of-the-art e-Fenton catalysts reported. Benefiting from the concurrent high-efficiency of H2O2 production and Fe2+ regeneration, HPCS-TPOS e-Fenton is demonstrated to be efficient for sulfamethoxazole removal with the kinetic rate of 0.30-0.72 min-1 at pH 3-7. This work offers new insight into the design of efficient catalysts by rationally regulating curvature structures for wastewater treatment.
Collapse
Affiliation(s)
- Xin Qin
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Kaixuan Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Peike Cao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yan Su
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, China
| | - Shuo Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Hongtao Yu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xie Quan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
| |
Collapse
|
14
|
Hassani Besheli N, Verbakel J, Hosseini M, Andrée L, Joosten B, Walboomers XF, Cambi A, Yang F, Leeuwenburgh SCG. Cellular Uptake of Modified Mesoporous Bioactive Glass Nanoparticles for Effective Intracellular Delivery of Therapeutic Agents. Int J Nanomedicine 2023; 18:1599-1612. [PMID: 37013026 PMCID: PMC10066699 DOI: 10.2147/ijn.s397297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 02/23/2023] [Indexed: 03/30/2023] Open
Abstract
Introduction There has recently been a surge of interest in mesoporous bioactive glass nanoparticles (MBGNs) as multi-functional nanocarriers for application in bone-reconstructive and -regenerative surgery. Their excellent control over their structural and physicochemical properties renders these nanoparticles suitable for the intracellular delivery of therapeutic agents to combat degenerative bone diseases, such as bone infection, or bone cancer. Generally, the therapeutic efficacy of nanocarriers strongly depends on the efficacy of their cellular uptake, which is determined by numerous factors including cellular features and the physicochemical characteristics of nanocarriers, particularly surface charge. In this study, we have systematically investigated the effect of the surface charge of MBGNs doped with copper as a model therapeutic agent on cellular uptake by both macrophages and pre-osteoblast cells involved in bone healing and bone infections to guide the future design of MBGN-based nanocarriers. Methods Cu-MBGNs with negative, neutral, and positive surface charges were synthesized and their cellular uptake efficiency was assessed. Additionally, the intracellular fate of internalized nanoparticles along with their ability to deliver therapeutic cargo was studied in detail. Results The results showed that both cell types internalized Cu-MBGNs regardless of their surface charge, indicating that cellular uptake of nanoparticles is a complex process influenced by multiple factors. This similarity in cellular uptake was attributed to the formation of a protein corona surrounding the nanoparticles when exposed to protein-rich biological media, which masks the original nanoparticle surface. Once internalized, the nanoparticles were found to mainly colocalize with lysosomes, exposing them to a more compartmentalized and acidic environment. Furthermore, we verified that Cu-MBGNs released their ionic components (Si, Ca, and Cu ions) in both acidic and neutral environments, leading to the delivery of these therapeutic cargos intracellularly. Conclusion The effective internalization of Cu-MBGNs and their ability to deliver cargos intracellularly highlight their potential as intracellular delivery nanocarriers for bone-regenerative and -healing applications.
Collapse
Affiliation(s)
- Negar Hassani Besheli
- Department of Dentistry – Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Juul Verbakel
- Department of Dentistry – Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Maryam Hosseini
- Department of Dentistry – Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Lea Andrée
- Department of Dentistry – Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Ben Joosten
- Department of Cell Biology, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - X Frank Walboomers
- Department of Dentistry – Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Alessandra Cambi
- Department of Cell Biology, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Fang Yang
- Department of Dentistry – Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
| | - Sander C G Leeuwenburgh
- Department of Dentistry – Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, The Netherlands
- Correspondence: Sander CG Leeuwenburgh, Tel +31 6 15 40 9006, Fax +31 2 43 61 4657, Email
| |
Collapse
|
15
|
Dos Santos da Silva A, Dos Santos JHZ. Stöber method and its nuances over the years. Adv Colloid Interface Sci 2023; 314:102888. [PMID: 37001206 DOI: 10.1016/j.cis.2023.102888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/06/2023] [Accepted: 03/25/2023] [Indexed: 03/30/2023]
Abstract
Some characteristics of silica-based materials, such as the control/adjustment of their physical and chemical properties, compatibility, and friendly-use synthesis methods, have held the attention of several scientific groups over the years. This condition of prominence becomes even more evident when we seek these characteristics at the micro- and/or nanoscale. Among existing methods to obtain these micro/nanomaterials, the Stöber method is the focus of this review. This method is known to enable the production of silica micro- or nanoparticles from reagents of medium-easy manipulation under mild conditions using equipment that is common in most laboratories. However, this method has many nuances that must be considered to guarantee accurate results, either in size or distribution, and to ensure result reproducibility. Thus, in this review, we discuss the effects of the primary components used in the synthesis of these materials (i.e., TEOS, ammonia, and water), as well as those of other reaction conditions, such as solvent, temperature, and ionic strength. Therefore, we discuss studies involving the synthesis and characterization of micro- and nanoparticles over the years to establish discussions between their experimental observations and proposed models. This review provides experimental observations about the synthesis of these materials, as well as discussions according to complementary and/or contradictory evidence found over the years. This review seeks to help those who intend to work with this method and provide certain key points that, in our experience, can be important to obtain desired results.
Collapse
|
16
|
Kermanizadeh S, Naeimi H, Mousavi S. An efficient and eco-compatible multicomponent synthesis of 2,4,5-trisubstituted imidazole derivatives using modified-silica-coated cobalt ferrite nanoparticles with tungstic acid. Dalton Trans 2023; 52:1257-1267. [PMID: 36607334 DOI: 10.1039/d2dt03021g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The aim of this study has been to offer a method for the synthesis of 2,4,5-trisubstituted imidazole derivatives based on green chemistry principles. Therefore, a one-pot multicomponent cyclocondensation reaction through aldehyde interaction with ammonium acetate and 1,2-diketone under solvent-free conditions was utilized as an eco-effective synthetic route using CoFe2O4@SiO2@(-CH2)3OWO3H NPs as the catalyst. The stabilized tungstic acid on 3-chloropropyl-anchored SiO2-coated CoFe2O4 magnetic nanoparticles was designed, prepared, and applied as a recyclable heterogeneous acid catalyst to attain high product yield in a short reaction time. The nanocatalyst structure was confirmed using FT-IR, Raman, XRD, FE-SEM, EDX, VSM, and TGA techniques, and the organic product structures were examined by melting point, FT-IR and 1H NMR analyses.
Collapse
Affiliation(s)
- Shadan Kermanizadeh
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317, I. R. Iran.
| | - Hossein Naeimi
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317, I. R. Iran.
| | - Setareh Mousavi
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317, I. R. Iran.
| |
Collapse
|
17
|
Zeimaran E, Pourshahrestani S, Razak NABA, Kadri NA, Kargozar S, Baino F. Nanoscale bioactive glass/injectable hydrogel composites for biomedical applications. FUNCTIONAL NANOCOMPOSITE HYDROGELS 2023:125-147. [DOI: 10.1016/b978-0-323-99638-9.00005-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
|
18
|
Hosseini M, Hassani Besheli N, Deng D, Lievens C, Zuo Y, Leeuwenburgh SCG, Yang F. Facile post modification synthesis of copper-doped mesoporous bioactive glass with high antibacterial performance to fight bone infection. BIOMATERIALS ADVANCES 2022; 144:213198. [PMID: 36424276 DOI: 10.1016/j.bioadv.2022.213198] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 10/24/2022] [Accepted: 11/13/2022] [Indexed: 11/17/2022]
Abstract
Successful treatment of infected bone defects caused by multi-drug resistant bacteria (MDR) has become a major clinical challenge, stressing the urgent need for effective antibacterial bone graft substitutes. Mesoporous bioactive glass nanoparticles (MBGNs), a rapidly emerging class of nanoscale biomaterials, offer specific advantages for the development of biomaterials to treat bone infection due to endowed antibacterial features. Herein, we propose a facile post-modification sol-gel strategy to synthesize effective antibacterial MBGNs doped with copper ions (Cu-PMMBGNs). In this strategy, amine functional groups as chelating agents were introduced to premade mesoporous silica nanoparticles (MSNs) which further facilitate the incorporation of high content of calcium (∼17 mol%) and copper ions (∼8 mol%) without compromising nanoparticle shape, mesoporosity, and homogeneity. The resulting nanoparticles were degradable and showed rapidly induce abundant deposition of apatite crystals on their surface upon soaking in simulated body fluids (SBF) after 3 days. Cu-PMMBGNs exhibited a dose-dependent inhibitory effect on Methicillin-resistant Staphylococcus aureus (MRSA) bacteria, which are common pathogens causing severe bone infections. Most importantly, the nanoparticles containing 5 mol% copper ions at concentrations of 500 and 1000 μg.mL-1 showed highly effective antibacterial performance as reflected by a 99.9 % reduction of bacterial viability. Nanoparticles at a concentration of 500 μg.mL-1 showed no significant cytotoxicity toward preosteoblast cells (∼85-89 % cell viability) compared to the control group. In addition, the nanoscale properties of synthesized Cu-PMMBGNs (∼100 nm in size) facilitated their internalization into preosteoblast cells, which highlights their potential as intracellular carriers in combating intracellular bacteria. Therefore, these copper-doped nanoparticles hold strong promise for use as an antibacterial component in antibacterial bone substitutes such as hydrogels, nanocomposites, and coatings.
Collapse
Affiliation(s)
- Maryam Hosseini
- Department of Dentistry - Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands; Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), Tehran 1591634311, Iran
| | - Negar Hassani Besheli
- Department of Dentistry - Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands
| | - Dongmei Deng
- Department of Preventive Dentistry, Academic Center for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam 1081 LA, The Netherlands
| | - Caroline Lievens
- Department of Earth Systems Analysis, Faculty of Geo-information Science and Earth Observation, University of Twente, Hengelosestraat 99, 7514 AE Enschede, The Netherlands
| | - Yi Zuo
- Analytic and Testing Center, Sichuan University, 610064 Chengdu, China
| | - Sander C G Leeuwenburgh
- Department of Dentistry - Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands.
| | - Fang Yang
- Department of Dentistry - Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboudumc, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands.
| |
Collapse
|
19
|
Mitchell J, Pintro C, Nolan K, Davenport-Munoz M, Spitzer K, Yu R, Wu J. Functionalized silica nanoparticles coupled with nanoporous membrane for efficient ionic current rectification. NANOTECHNOLOGY 2022; 34:015707. [PMID: 36179658 DOI: 10.1088/1361-6528/ac9687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
In the last few decades, tremendous effort has been dedicated to mimicking the efficient ionic current rectification (ICR) of biological nanopores. Nanoporous membranes and singular nanopores with ICR functionality have been fabricated using advanced, yet costly technologies. We herein demonstrate that a simple, novel, and robust ICR platform can be constructed using 80 nm silica nanoparticles and a piece of 15 nm track-etched polycarbonate membrane. Efficient ICR can be obtained when voltages of different polarities are applied across the membrane, due to the asymmetric electrophoretic migration of silica nanoparticles whose surfaces are modified with different functional groups. The effect of pore size, ionic strength, pH, voltage magnitude, and density of silica nanoparticles on the efficiency of the ICR system has been systematically investigated in this report. Our results clearly show that smaller pore, lower ionic strength, appropriate pH value, higher electrical field strength, lower density of silica nanoparticles can generally enhance the efficiency of the ICR system. The principles of this new ICR system may find many potential applications in controllable drug delivery, energy storage and water purification.
Collapse
Affiliation(s)
- Juan Mitchell
- Department of Chemistry and Biochemistry, Georgia Southern University, 250 Forest Drive, Statesboro, GA 30460, United States of America
| | - Chris Pintro
- Department of Chemistry and Biochemistry, Georgia Southern University, 250 Forest Drive, Statesboro, GA 30460, United States of America
| | - Katie Nolan
- Department of Chemistry and Biochemistry, Georgia Southern University, 250 Forest Drive, Statesboro, GA 30460, United States of America
| | - Maurice Davenport-Munoz
- Department of Chemistry and Biochemistry, Georgia Southern University, 250 Forest Drive, Statesboro, GA 30460, United States of America
| | - Kyle Spitzer
- Department of Chemistry and Biochemistry, Georgia Southern University, 250 Forest Drive, Statesboro, GA 30460, United States of America
| | - Rachel Yu
- Department of Chemistry and Biochemistry, Georgia Southern University, 250 Forest Drive, Statesboro, GA 30460, United States of America
| | - Ji Wu
- Department of Chemistry and Biochemistry, Georgia Southern University, 250 Forest Drive, Statesboro, GA 30460, United States of America
| |
Collapse
|
20
|
Fandzloch M, Bodylska W, Barszcz B, Trzcińska-Wencel J, Roszek K, Golińska P, Lukowiak A. Effect of ZnO on sol–gel glass properties toward (bio)application. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
21
|
Sivolapov P, Myronyuk O, Baklan D. Synthesis of Stober silica nanoparticles in solvent environments with different Hansen solubility parameters. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
22
|
Mat N, Timmiati SN, Teh LP. Recent development in metal oxide-based core–shell material for CO2 capture and utilisation. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02559-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
23
|
Ornelas-Hernández LF, Garduno-Robles A, Zepeda-Moreno A. A Brief Review of Carbon Dots-Silica Nanoparticles Synthesis and their Potential Use as Biosensing and Theragnostic Applications. NANOSCALE RESEARCH LETTERS 2022; 17:56. [PMID: 35661270 PMCID: PMC9167377 DOI: 10.1186/s11671-022-03691-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
Carbon dots (CDs) are carbon nanoparticles with sizes below 10 nm and have attracted attention due to their relatively low toxicity, great biocompatibility, water solubility, facile synthesis, and exceptional photoluminescence properties. Accordingly, CDs have been widely exploited in different sensing and biomedical applications, for example, metal sensing, catalysis, biosensing, bioimaging, drug and gene delivery, and theragnostic applications. Similarly, the well-known properties of silica, such as facile surface functionalization, good biocompatibility, high surface area, and tunable pore volume, have allowed the loading of diverse inorganic and organic moieties and nanoparticles, creating complex hybrid nanostructures that exploit distinct properties (optical, magnetic, metallic, mesoporous, etc.) for sensing, biosensing, bioimaging, diagnosis, and gene and drug delivery. In this context, CDs have been successfully grafted into diverse silica nanostructures through various synthesis methods (e.g., solgel chemistry, inverse microemulsion, surfactant templating, and molecular imprinting technology (MIT)), imparting hybrid nanostructures with multimodal properties for distinct objectives. This review discusses the recently employed synthesis methods for CDs and silica nanoparticles and their typical applications. Then, we focus on combined synthesis techniques of CD-silica nanostructures and their promising biosensing operations. Finally, we overview the most recent potential applications of these materials as innovative smart hybrid nanocarriers and theragnostic agents for the nanomedical field.
Collapse
Affiliation(s)
- Luis Fernando Ornelas-Hernández
- Onkogenetik/Mexicana de Investigación Y Biotectogía SA. de C.V., Av. Miguel Hidalgo y Costilla 1966, Guadalajara, Jalisco, México
| | - Angeles Garduno-Robles
- Onkogenetik/Mexicana de Investigación Y Biotectogía SA. de C.V., Av. Miguel Hidalgo y Costilla 1966, Guadalajara, Jalisco, México
| | - Abraham Zepeda-Moreno
- Onkogenetik/Mexicana de Investigación Y Biotectogía SA. de C.V., Av. Miguel Hidalgo y Costilla 1966, Guadalajara, Jalisco, México.
- Unidad de Biología Molecular, Investigación Y Diagnóstico SA de CV, Hospital San Javier, Pablo Casals 640, Guadalajara, Jalisco, México.
- Departamento de Clínicas Médicas, Centro Universitario de Ciencias de La Salud, Universidad de Guadalajara, Sierra Mojada 950, Guadalajara, Jalisco, México.
| |
Collapse
|
24
|
Zinc-Containing Sol-Gel Glass Nanoparticles to Deliver Therapeutic Ions. NANOMATERIALS 2022; 12:nano12101691. [PMID: 35630912 PMCID: PMC9143105 DOI: 10.3390/nano12101691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 05/10/2022] [Accepted: 05/13/2022] [Indexed: 12/21/2022]
Abstract
Zn-containing dense monodispersed bioactive glass nanoparticles (Zn-BAGNPs) have been developed to deliver therapeutic inorganic trace elements, including Si, Ca, Sr, and Zn, to the cells through the degradation process, as delivery carriers for stimulating bone regeneration because of their capacity to induce osteogenic differentiation. The sol–gel-derived dense silica nanoparticles (SiO2-NPs) were first synthesized using the modified Stöber method, prior to incorporating therapeutic cations through the heat treatment process. The successfully synthesized monodispersed Zn-BAGNPs (diameter of 130 ± 20 nm) were homogeneous in size with spherical morphology. Ca, Sr and Zn were incorporated through the two-step post-functionalization process, with the nominal ZnO ratio between 0 and 2 (0, 0.5, 1.0, 1.5 and 2.0). Zn-BAGNPs have the capacity for continuous degradation and simultaneous ion release in SBF and PBS solutions due to their amorphous structure. Zn-BAGNPs have no in vitro cytotoxicity on the murine pre-osteoblast cell (MC3T3-E1) and periodontal ligament stem cells (PDLSCs), up to a concentration of 250 µg/mL. Zn-BAGNPs also stimulated osteogenic differentiation on PDLSCs treated with particles, after 2 and 3 weeks in culture. Zn-BAGNPs were not toxic to the cells and have the potential to stimulate osteogenic differentiation on PDLSCs. Therefore, Zn-BAGNPs are potential vehicles for therapeutic cation delivery for applications in bone and dental regenerations.
Collapse
|
25
|
Yeşil Acar Z, Asiltürk M, Arpaç E. Preparation of ceria by combined sol–gel and hydrothermal method: insights from the effects of different bases on the particle size distribution. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02217-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
26
|
Nawaz Q, de Pablos-Martín A, Berthold L, Martins de Souza e Silva J, Hurle K, Boccaccini AR. Mapping the elemental and crystalline phase distribution in Cu2+ doped 45S5 bioactive glass upon crystallization. CrystEngComm 2022. [DOI: 10.1039/d1ce01160j] [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
Nano-CT and TEM imaging characterisation of Cu-doped 45S5 glass-ceramics. The grain size and content of Cu-riched glassy phase, which affect bioactive and mechanical responses, can be tuned by heat treatment.
Collapse
Affiliation(s)
- Qaisar Nawaz
- Institute of Biomaterials, Department of Material Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
| | - Araceli de Pablos-Martín
- Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Walter-Huelse-Strasse 1, 06120 Halle, Germany
- Otto Schott Institute of Materials Research, Friedrich Schiller University, Fraunhoferstr. 6, 07743 Jena, Germany
| | - Lutz Berthold
- Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Walter-Huelse-Strasse 1, 06120 Halle, Germany
| | - Juliana Martins de Souza e Silva
- Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Walter-Huelse-Strasse 1, 06120 Halle, Germany
- Institute of Physics, Martin Luther University Halle-Wittenberg, Heinrich-Damerow-Str. 4, 06120 Halle, Germany
| | - Katrin Hurle
- Mineralogy, University of Erlangen-Nürnberg, GeoZentrum Nordbayern, Schloßgarten 5a, 91054 Erlangen, Germany
| | - Aldo R. Boccaccini
- Institute of Biomaterials, Department of Material Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
| |
Collapse
|
27
|
Magnetite-Silica Core/Shell Nanostructures: From Surface Functionalization towards Biomedical Applications—A Review. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112211075] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The interconnection of nanotechnology and medicine could lead to improved materials, offering a better quality of life and new opportunities for biomedical applications, moving from research to clinical applications. Magnetite nanoparticles are interesting magnetic nanomaterials because of the property-depending methods chosen for their synthesis. Magnetite nanoparticles can be coated with various materials, resulting in “core/shell” magnetic structures with tunable properties. To synthesize promising materials with promising implications for biomedical applications, the researchers functionalized magnetite nanoparticles with silica and, thanks to the presence of silanol groups, the functionality, biocompatibility, and hydrophilicity were improved. This review highlights the most important synthesis methods for silica-coated with magnetite nanoparticles. From the presented methods, the most used was the Stöber method; there are also other syntheses presented in the review, such as co-precipitation, sol-gel, thermal decomposition, and the hydrothermal method. The second part of the review presents the main applications of magnetite-silica core/shell nanostructures. Magnetite-silica core/shell nanostructures have promising biomedical applications in magnetic resonance imaging (MRI) as a contrast agent, hyperthermia, drug delivery systems, and selective cancer therapy but also in developing magnetic micro devices.
Collapse
|
28
|
Kurtuldu F, Kaňková H, Beltrán AM, Liverani L, Galusek D, Boccaccini AR. Anti-inflammatory and antibacterial activities of cerium-containing mesoporous bioactive glass nanoparticles for drug-free biomedical applications. Mater Today Bio 2021; 12:100150. [PMID: 34761197 PMCID: PMC8568607 DOI: 10.1016/j.mtbio.2021.100150] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/08/2021] [Accepted: 10/09/2021] [Indexed: 12/19/2022] Open
Abstract
Mesoporous bioactive glass nanoparticles (MBGNPs) are attracting significant attention as suitable materials for multifunctional biomedical applications. In this study, cerium was incorporated into MBGNPs using two different approaches. In the first approach, cerium was added to the glass system directly during the synthesis, while in the second approach, cerium was added to the as-synthesized MBGNPs via the template ion-exchange method. The influence of the method of synthesis on the physicochemical properties of nanoparticles was examined by SEM, TEM, XRD, FTIR, and N2 adsorption-desorption analyses. The MBGNPs exhibited spheroidal morphology and disordered mesoporous structure. XRD analysis confirmed the amorphous nature of the nanoparticles. The chemical composition was determined by the acid digestion method using ICP-OES. The influence of the synthesis method on the specific surface area, mesoporosity, and solubility of synthesized nanoparticles in Tris/HCl (pH 7.4) and acetate (pH 4.5) buffer has also been studied. The obtained Ce containing MBGNPs were non-cytotoxic toward preosteoblast MC3T3-E1 cells in contact with nanoparticles in a concentration of up to 100 μg/mL. The anti-inflammatory effect of Ce containing MBGNPs was tested with lipopolysaccharides (LPS)-induced proinflammatory RAW 264.7 macrophage cells. Ce containing MBGNPs decreased the release of nitric oxide, indicating the anti-inflammatory response of macrophage cells. Ce containing MBGNPs also showed antibacterial activity against S. aureus and E. coli. The mentioned features of the obtained MBGNPs make them useful in a variety of biomedical applications, considering their biocompatibility, anti-inflammatory response, and enhanced antibacterial effect.
Collapse
Affiliation(s)
- F Kurtuldu
- FunGlass, Alexander Dubček University of Trenčín, 911 50 Trenčín, Slovakia.,Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
| | - H Kaňková
- FunGlass, Alexander Dubček University of Trenčín, 911 50 Trenčín, Slovakia
| | - A M Beltrán
- Departamento de Ingeniería y Ciencia de Los Materiales y Del Transporte, Escuela Politécnica Superior, University of Seville, 41011 Seville, Spain
| | - L Liverani
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
| | - D Galusek
- FunGlass, Alexander Dubček University of Trenčín, 911 50 Trenčín, Slovakia.,Joint Glass Centre of the IIC SAS, TnUAD and FChFT STU, FunGlass, 911 50, Trenčín, Slovakia
| | - A R Boccaccini
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
| |
Collapse
|
29
|
Casteleiro B, Martinho JMG, Farinha JPS. Encapsulation of gold nanoclusters: stabilization and more. NANOSCALE 2021; 13:17199-17217. [PMID: 34622909 DOI: 10.1039/d1nr04939a] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Gold nanoparticles with only a few atoms, known as gold nanoclusters (AuNCs), have dimensions below 2 nm and feature singular properties such as size dependent luminescence. AuNCs are also highly photostable and have catalytic activity, low toxicity and good biocompatibility. With these properties, they are extremely promising candidates for application in bioimaging, sensing and catalysis. However, when stabilized only with small capping ligands, their use is hindered by lack of colloidal stability. Encapsulation of the AuNCs can contribute to provide a more robust protection and even to improve their properties. Here, we review the encapsulation of AuNCs in polymers, silica and metal organic frameworks (MOFs) for applications in bioimaging, sensing and catalysis.
Collapse
Affiliation(s)
- Bárbara Casteleiro
- Centro de Química Estrutural and Department of Chemical Engineering, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal.
| | - José Manuel Gaspar Martinho
- Centro de Química Estrutural and Department of Chemical Engineering, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal.
| | - José Paulo Sequeira Farinha
- Centro de Química Estrutural and Department of Chemical Engineering, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal.
| |
Collapse
|
30
|
Brézulier D, Chaigneau L, Jeanne S, Lebullenger R. The Challenge of 3D Bioprinting of Composite Natural Polymers PLA/Bioglass: Trends and Benefits in Cleft Palate Surgery. Biomedicines 2021; 9:1553. [PMID: 34829782 PMCID: PMC8615666 DOI: 10.3390/biomedicines9111553] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/15/2021] [Accepted: 10/19/2021] [Indexed: 11/22/2022] Open
Abstract
Cleft lip and palate is the fourth most common congenital malformation. Its prevalence is about 1 in 750 to 1 in 2000 live births. The consequences of this malformation are major: maxillary growth deficit, unaesthetic appearance, phonation disorders, difficulty in eating, and psycho-social disorders. Cleft palate repair establishes the division between the oral and nasal cavities. The alveolar bone graft is a key step. Different sites of autogenous bone harvesting are used, the most common being the iliac crest. Nevertheless, the large number of complications associated with harvesting has led to the use of substitute biomaterials. Bioactive glasses, discovered in 1969, are a group of synthetic silica-based materials with bone-bonding properties. Although 45S5 granular composition is commonly used in bone surgery to repair critical defects, it is only rarely used in the repair of cleft palates because this galenic form is only moderately adapted. However, advances in bone tissue engineering allow the shaping of three-dimensional scaffolds, which support colonization by host cells. Recent advances in computer-aided design/computer-aided manufacturing (CAD/CAM) have even led to the 3D printing of scaffolds combining 45S5 bioglass with a natural and biocompatible poly-lactic acid matrix. The shape of the parts is customized and adapted to the particular shape of the critical bone defects. The objective of this literature review is to highlight the particularities of alveolar defects subsequent to facial clefts, then to detail the characteristics of the materials and technologies used to elaborate 3D matrices by bioprinting. Finally, we will explore research directions regarding their use in reconstructive surgery of cleft palates.
Collapse
Affiliation(s)
- Damien Brézulier
- CNRS, University of Rennes, ISCR-UMR 6226, 35000 Rennes, France; (L.C.); (S.J.); (R.L.)
- Pôle Odontologie, CHU Rennes, University of Rennes, 35043 Rennes, France
| | - Louis Chaigneau
- CNRS, University of Rennes, ISCR-UMR 6226, 35000 Rennes, France; (L.C.); (S.J.); (R.L.)
| | - Sylvie Jeanne
- CNRS, University of Rennes, ISCR-UMR 6226, 35000 Rennes, France; (L.C.); (S.J.); (R.L.)
- Pôle Odontologie, CHU Rennes, University of Rennes, 35043 Rennes, France
| | - Ronan Lebullenger
- CNRS, University of Rennes, ISCR-UMR 6226, 35000 Rennes, France; (L.C.); (S.J.); (R.L.)
| |
Collapse
|
31
|
Staropoli M, Rogé V, Moretto E, Didierjean J, Michel M, Duez B, Steiner P, Thielen G, Lenoble D, Thomann JS. Hybrid Silica-Based Fillers in Nanocomposites: Influence of Isotropic/Isotropic and Isotropic/Anisotropic Fillers on Mechanical Properties of Styrene-Butadiene (SBR)-Based Rubber. Polymers (Basel) 2021; 13:2413. [PMID: 34372014 PMCID: PMC8348337 DOI: 10.3390/polym13152413] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/14/2021] [Accepted: 07/19/2021] [Indexed: 11/17/2022] Open
Abstract
The improvement of mechanical properties of polymer-based nanocomposites is usually obtained through a strong polymer-silica interaction. Most often, precipitated silica nanoparticles are used as filler. In this work, we study the synergetic effect occurring between dual silica-based fillers in a styrene-butadiene rubber (SBR)/polybutadiene (PBD) rubber matrix. Precipitated Highly Dispersed Silica (HDS) nanoparticles (10 nm) have been associated with spherical Stöber silica nanoparticles (250 nm) and anisotropic nano-Sepiolite. By imaging filler at nano scale through Scanning Transmission Electron Microscopy, we have shown that anisotropic fillers align only in presence of a critical amount of HDS. The dynamic mechanical analysis of rubber compounds confirms that this alignment leads to a stiffer nanocomposite when compared to Sepiolite alone. On the contrary, spherical 250 nm nanoparticles inhibit percolation network and reduce the nanocomposite stiffness.
Collapse
Affiliation(s)
- Mariapaola Staropoli
- MRT Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, Belvaux, L-4422 Luxembourg, Luxembourg; (V.R.); (E.M.); (J.D.); (M.M.); (D.L.); (J.-S.T.)
| | - Vincent Rogé
- MRT Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, Belvaux, L-4422 Luxembourg, Luxembourg; (V.R.); (E.M.); (J.D.); (M.M.); (D.L.); (J.-S.T.)
| | - Enzo Moretto
- MRT Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, Belvaux, L-4422 Luxembourg, Luxembourg; (V.R.); (E.M.); (J.D.); (M.M.); (D.L.); (J.-S.T.)
| | - Joffrey Didierjean
- MRT Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, Belvaux, L-4422 Luxembourg, Luxembourg; (V.R.); (E.M.); (J.D.); (M.M.); (D.L.); (J.-S.T.)
| | - Marc Michel
- MRT Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, Belvaux, L-4422 Luxembourg, Luxembourg; (V.R.); (E.M.); (J.D.); (M.M.); (D.L.); (J.-S.T.)
| | - Benoit Duez
- Goodyear S.A, Avenue Gordon Smith, Colmar-Berg, L-7750 Luxembourg, Luxembourg; (B.D.); (P.S.); (G.T.)
| | - Pascal Steiner
- Goodyear S.A, Avenue Gordon Smith, Colmar-Berg, L-7750 Luxembourg, Luxembourg; (B.D.); (P.S.); (G.T.)
| | - Georges Thielen
- Goodyear S.A, Avenue Gordon Smith, Colmar-Berg, L-7750 Luxembourg, Luxembourg; (B.D.); (P.S.); (G.T.)
| | - Damien Lenoble
- MRT Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, Belvaux, L-4422 Luxembourg, Luxembourg; (V.R.); (E.M.); (J.D.); (M.M.); (D.L.); (J.-S.T.)
| | - Jean-Sébastien Thomann
- MRT Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, Belvaux, L-4422 Luxembourg, Luxembourg; (V.R.); (E.M.); (J.D.); (M.M.); (D.L.); (J.-S.T.)
| |
Collapse
|
32
|
Mutlu N, Beltrán AM, Nawaz Q, Michálek M, Boccaccini AR, Zheng K. Combination of Selective Etching and Impregnation toward Hollow Mesoporous Bioactive Glass Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1846. [PMID: 34361232 PMCID: PMC8308350 DOI: 10.3390/nano11071846] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/03/2021] [Accepted: 07/12/2021] [Indexed: 12/16/2022]
Abstract
In this study, binary SiO2-CaO hollow mesoporous bioactive glass nanoparticles (HMBGNs) are prepared by combing selective etching and impregnation strategies. Spherical silica particles (SiO2 NPs) are used as hard cores to assemble cetyltrimethylammonium bromide (CTAB)/silica shells, which are later removed by selective etching to generate a hollow structure. After the removal of CTAB by calcination, the mesoporous shell of particles is formed. Calcium (Ca) is incorporated into the particles using impregnation by soaking the etched SiO2 NPs in calcium nitrate aqueous solution. The amount of incorporated Ca is tailorable by controlling the ratio of SiO2 NPs:calcium nitrate in the soaking solution. The produced HMBGNs are bioactive, as indicated by the rapid formation of hydroxyapatite on their surfaces after immersion in simulated body fluid. In a direct culture with MC3T3-E1 cells, HMBGNs were shown to exhibit concentration-dependent cytotoxicity and can stimulate osteogenic differentiation of MC3T3-E1 cells at concentrations of 1, 0.5, and 0.25 mg/mL. Our results indicate that the combination of selective etching and impregnation is a feasible approach to produce hierarchical HMBGNs. The produced hollow particles have potential in drug delivery and bone tissue regeneration applications, and should be further investigated in detailed in vitro and in vivo studies.
Collapse
Affiliation(s)
- Nurshen Mutlu
- Institute of Biomaterials, Department of Material Science and Engineering, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (N.M.); (Q.N.)
- FunGlass, Department of Biomaterials, Alexander Dubček University of Trenčín, Študentská 2, 911 50 Trenčín, Slovakia;
| | - Ana Maria Beltrán
- Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Politécnica Superior, Universidad de Sevilla, 41011 Seville, Spain;
| | - Qaisar Nawaz
- Institute of Biomaterials, Department of Material Science and Engineering, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (N.M.); (Q.N.)
| | - Martin Michálek
- FunGlass, Department of Biomaterials, Alexander Dubček University of Trenčín, Študentská 2, 911 50 Trenčín, Slovakia;
| | - Aldo R. Boccaccini
- Institute of Biomaterials, Department of Material Science and Engineering, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (N.M.); (Q.N.)
| | - Kai Zheng
- Institute of Biomaterials, Department of Material Science and Engineering, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (N.M.); (Q.N.)
| |
Collapse
|
33
|
Dolmatov AV, Maklakov SS, Zezyulina PA, Osipov AV, Petrov DA, Naboko AS, Polozov VI, Maklakov SA, Starostenko SN, Lagarkov AN. Deposition of a SiO 2 Shell of Variable Thickness and Chemical Composition to Carbonyl Iron: Synthesis and Microwave Measurements. SENSORS (BASEL, SWITZERLAND) 2021; 21:4624. [PMID: 34300364 PMCID: PMC8309671 DOI: 10.3390/s21144624] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 07/01/2021] [Accepted: 07/02/2021] [Indexed: 11/17/2022]
Abstract
Protective SiO2 coating deposited to iron microparticles is highly demanded both for the chemical and magnetic performance of the latter. Hydrolysis of tetraethoxysilane is the crucial method for SiO2 deposition from a solution. The capabilities of this technique have not been thoroughly studied yet. Here, two factors were tested to affect the chemical composition and the thickness of the SiO2 shell. It was found that an increase in the hydrolysis reaction time thickened the SiO2 shell from 100 to 200 nm. Moreover, a decrease in the acidity of the reaction mixture not only thickened the shell but also varied the chemical composition from SiO3.0 to SiO8.6. The thickness and composition of the dielectric layer were studied by scanning electron microscopy and energy-dispersive X-ray analysis. Microwave permeability and permittivity of the SiO2-coated iron particles mixed with a paraffin wax matrix were measured by the coaxial line technique. An increase in thickness of the silica layer decreased the real quasi-static permittivity. The changes observed were shown to agree with the Maxwell Garnett effective medium theory. The new method developed to fine-tune the chemical properties of the protective SiO2 shell may be helpful for new magnetic biosensor designs as it allows for biocompatibility adjustment.
Collapse
Affiliation(s)
- Arthur V. Dolmatov
- Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia; (A.V.D.); (P.A.Z.); (A.V.O.); (D.A.P.); (A.S.N.); (V.I.P.); (S.A.M.); (S.N.S.); (A.N.L.)
- Moscow Institute of Physics and Technology, National Research University, 9 Institutskiy per., 141700 Dolgoprudny, Russia
| | - Sergey S. Maklakov
- Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia; (A.V.D.); (P.A.Z.); (A.V.O.); (D.A.P.); (A.S.N.); (V.I.P.); (S.A.M.); (S.N.S.); (A.N.L.)
| | - Polina A. Zezyulina
- Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia; (A.V.D.); (P.A.Z.); (A.V.O.); (D.A.P.); (A.S.N.); (V.I.P.); (S.A.M.); (S.N.S.); (A.N.L.)
| | - Alexey V. Osipov
- Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia; (A.V.D.); (P.A.Z.); (A.V.O.); (D.A.P.); (A.S.N.); (V.I.P.); (S.A.M.); (S.N.S.); (A.N.L.)
| | - Dmitry A. Petrov
- Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia; (A.V.D.); (P.A.Z.); (A.V.O.); (D.A.P.); (A.S.N.); (V.I.P.); (S.A.M.); (S.N.S.); (A.N.L.)
| | - Andrey S. Naboko
- Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia; (A.V.D.); (P.A.Z.); (A.V.O.); (D.A.P.); (A.S.N.); (V.I.P.); (S.A.M.); (S.N.S.); (A.N.L.)
| | - Viktor I. Polozov
- Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia; (A.V.D.); (P.A.Z.); (A.V.O.); (D.A.P.); (A.S.N.); (V.I.P.); (S.A.M.); (S.N.S.); (A.N.L.)
- Moscow Institute of Physics and Technology, National Research University, 9 Institutskiy per., 141700 Dolgoprudny, Russia
| | - Sergey A. Maklakov
- Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia; (A.V.D.); (P.A.Z.); (A.V.O.); (D.A.P.); (A.S.N.); (V.I.P.); (S.A.M.); (S.N.S.); (A.N.L.)
| | - Sergey N. Starostenko
- Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia; (A.V.D.); (P.A.Z.); (A.V.O.); (D.A.P.); (A.S.N.); (V.I.P.); (S.A.M.); (S.N.S.); (A.N.L.)
| | - Andrey N. Lagarkov
- Institute for Theoretical and Applied Electromagnetics RAS, Izhorskaya St. 13, 125412 Moscow, Russia; (A.V.D.); (P.A.Z.); (A.V.O.); (D.A.P.); (A.S.N.); (V.I.P.); (S.A.M.); (S.N.S.); (A.N.L.)
| |
Collapse
|
34
|
Canziani H, Bever F, Sommereyns A, Schmidt M, Vogel N. Roughly Spherical: Tailored PMMA-SiO 2 Composite Supraparticles with Optimized Powder Flowability for Additive Manufacturing. ACS APPLIED MATERIALS & INTERFACES 2021; 13:25334-25345. [PMID: 34019394 DOI: 10.1021/acsami.1c02264] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Particulate materials with well-engineered properties are of key importance for many aspects in our daily life. Polymer powders with high flowability, for example, play a crucial role in the emerging field of powder-based additive manufacturing processes. However, the polymer- and composite material selection for these technologies is still limited. Here, we demonstrate the design of spherical polymethyl methacrylate (PMMA) and PMMA-SiO2 composite supraparticle powders with excellent powder flowability and tailored composition for powder-based additive manufacturing. Our process assembles these powders from the bottom up and affords a precise control over surface roughness and internal morphology via the choice of colloidal primary particles. We establish process-structure-property relationships connecting external spray-drying parameters and primary particle sizes with the resulting supraparticle roughness and, subsequently, with the macroscopic powder flowability and powder bed density. In a second step, we demonstrate the control of composition and internal morphology of PMMA-SiO2 composite supraparticles based on different mass mixings and diameter ratios of the two primary particle dispersions. Finally, we successfully apply the prepared supraparticle powders in powder bed additive manufacturing. The optimized flowability of the composite powders allows the production of two-layered square specimens with fusion between the individual layers and a uniform and tunable distribution of nanoscale SiO2 additives without requiring the addition of any flowing aids.
Collapse
Affiliation(s)
- Herbert Canziani
- Institute of Particle Technology, Friedrich-Alexander-University Erlangen-Nuremberg, Cauerstrasse 4, Erlangen 91058, Germany
- Interdisciplinary Center for Functional Particle Systems, Friedrich-Alexander-University Erlangen-Nuremberg, Haberstrasse 9a, Erlangen 91058, Germany
| | - Frederik Bever
- Institute of Particle Technology, Friedrich-Alexander-University Erlangen-Nuremberg, Cauerstrasse 4, Erlangen 91058, Germany
| | - Alexander Sommereyns
- Institute of Photonic Technologies, Friedrich-Alexander University Erlangen-Nuremberg, Konrad-Zuse-Strasse 3-5, Erlangen 91052, Germany
- Erlangen Graduate School in Advanced Optical Technologies (SAOT), Paul-Gordan-Strasse 6, Erlangen 91052, Germany
| | - Michael Schmidt
- Institute of Photonic Technologies, Friedrich-Alexander University Erlangen-Nuremberg, Konrad-Zuse-Strasse 3-5, Erlangen 91052, Germany
- Erlangen Graduate School in Advanced Optical Technologies (SAOT), Paul-Gordan-Strasse 6, Erlangen 91052, Germany
| | - Nicolas Vogel
- Institute of Particle Technology, Friedrich-Alexander-University Erlangen-Nuremberg, Cauerstrasse 4, Erlangen 91058, Germany
- Interdisciplinary Center for Functional Particle Systems, Friedrich-Alexander-University Erlangen-Nuremberg, Haberstrasse 9a, Erlangen 91058, Germany
| |
Collapse
|
35
|
Can sustainable, monodisperse, spherical silica be produced from biomolecules? A review. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01869-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
36
|
Jang E. Effect of Alcohol Chain Length on Formation of Cetyltrimethylammonium Bromide‐templated Mesoporous Silica Layer on Gold Nanorods. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Eue‐Soon Jang
- Department of Applied Chemistry Kumoh National Institute of Technology, Daehak‐ro 61, Gumi Gyeongbuk South Korea
| |
Collapse
|
37
|
Bano S, Akhtar M, Yasir M, Salman Maqbool M, Niaz A, Wadood A, Ur Rehman MA. Synthesis and Characterization of Silver-Strontium (Ag-Sr)-Doped Mesoporous Bioactive Glass Nanoparticles. Gels 2021; 7:34. [PMID: 33805013 PMCID: PMC8103248 DOI: 10.3390/gels7020034] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 12/16/2022] Open
Abstract
Biomedical implants are the need of this era due to the increase in number of accidents and follow-up surgeries. Different types of bone diseases such as osteoarthritis, osteomalacia, bone cancer, etc., are increasing globally. Mesoporous bioactive glass nanoparticles (MBGNs) are used in biomedical devices due to their osteointegration and bioactive properties. In this study, silver (Ag)- and strontium (Sr)-doped mesoporous bioactive glass nanoparticles (Ag-Sr MBGNs) were prepared by a modified Stöber process. In this method, Ag+ and Sr2+ were co-substituted in pure MBGNs to harvest the antibacterial properties of Ag ions, as well as pro-osteogenic potential of Sr2 ions. The effect of the two-ion concentration on morphology, surface charge, composition, antibacterial ability, and in-vitro bioactivity was studied. Scanning electron microscopy (SEM), X-Ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) confirmed the doping of Sr and Ag in MBGNs. SEM and EDX analysis confirmed the spherical morphology and typical composition of MBGNs, respectively. The Ag-Sr MBGNs showed a strong antibacterial effect against Staphylococcus carnosus and Escherichia coli bacteria determined via turbidity and disc diffusion method. Moreover, the synthesized Ag-Sr MBGNs develop apatite-like crystals upon immersion in simulated body fluid (SBF), which suggested that the addition of Sr improved in vitro bioactivity. The Ag-Sr MBGNs synthesized in this study can be used for the preparation of scaffolds or as a filler material in the composite coatings for bone tissue engineering.
Collapse
Affiliation(s)
- Shaher Bano
- Department of Materials Science and Engineering, Institute of Space Technology Islamabad, Islamabad 44000, Pakistan; (S.B.); (M.A.); (M.Y.); (A.W.)
| | - Memoona Akhtar
- Department of Materials Science and Engineering, Institute of Space Technology Islamabad, Islamabad 44000, Pakistan; (S.B.); (M.A.); (M.Y.); (A.W.)
| | - Muhammad Yasir
- Department of Materials Science and Engineering, Institute of Space Technology Islamabad, Islamabad 44000, Pakistan; (S.B.); (M.A.); (M.Y.); (A.W.)
| | - Muhammad Salman Maqbool
- Department of Mechanical and Manufacturing Engineering, La Trobe University, Melbourne, VIC 3086, Australia;
| | - Akbar Niaz
- Department of Mechanical Engineering, King Faisal University, Al Hufūf 31982, Saudi Arabia;
| | - Abdul Wadood
- Department of Materials Science and Engineering, Institute of Space Technology Islamabad, Islamabad 44000, Pakistan; (S.B.); (M.A.); (M.Y.); (A.W.)
| | - Muhammad Atiq Ur Rehman
- Department of Materials Science and Engineering, Institute of Space Technology Islamabad, Islamabad 44000, Pakistan; (S.B.); (M.A.); (M.Y.); (A.W.)
| |
Collapse
|
38
|
Uttinger MJ, Jung D, Dao N, Canziani H, Lübbert C, Vogel N, Peukert W, Harting J, Walter J. Probing sedimentation non-ideality of particulate systems using analytical centrifugation. SOFT MATTER 2021; 17:2803-2814. [PMID: 33554981 DOI: 10.1039/d0sm01805h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Analytical centrifugation is a versatile technique for the quantitative characterization of colloidal systems including colloidal stability. The recent developments in data acquisition and evaluation allow the accurate determination of particle size, shape anisotropy and particle density. High precision analytical centrifugation is in particular suited for the study of particle interactions and concentration-dependent sedimentation coefficients. We present a holistic approach for the quantitative determination of sedimentation non-ideality via analytical centrifugation for polydisperse, plain and amino-functionalized silica particles spanning over one order of magnitude in particle size between 100 nm and 1200 nm. These systems typically behave as neutral hard spheres as predicted by auxiliary lattice Boltzmann simulations. The extent of electrostatic interactions and their impact on sedimentation non-ideality can be quantified by the repulsion range, which is the ratio of the Debye length and the average interparticle distance. Experimental access to the repulsion range is provided through conductivity measurements. With the experimental repulsion range at hand, we estimate the effect of polydispersity on concentration-dependent sedimentation properties through a combination of lattice Boltzmann and Brownian dynamics simulations. Finally, we determine the concentration-dependent sedimentation properties of charge-stabilized, fluorescently-labeled silica particles with a nominal particle size of 30 nm and reduced interparticle distance, hence an elevated repulsion range. Overall, our results demonstrate how the influence of hard-sphere type and electrostatic interactions can be quantified when probing sedimentation non-ideality of particulate systems using analytical centrifugation even for systems exhibiting moderate sample heterogeneity and complex interactions.
Collapse
Affiliation(s)
- M J Uttinger
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstraße 9a, 91058 Erlangen, Germany
| | - D Jung
- Forschungszentrum Jülich, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Fürther Straße 248, 90429 Nürnberg, Germany
| | - N Dao
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany.
| | - H Canziani
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstraße 9a, 91058 Erlangen, Germany
| | - C Lübbert
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstraße 9a, 91058 Erlangen, Germany
| | - N Vogel
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstraße 9a, 91058 Erlangen, Germany
| | - W Peukert
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstraße 9a, 91058 Erlangen, Germany
| | - J Harting
- Forschungszentrum Jülich, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Fürther Straße 248, 90429 Nürnberg, Germany and Department of Chemical and Biological Engineering and Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fürther Straße 248, 90429 Nürnberg, Germany
| | - J Walter
- Institute of Particle Technology (LFG), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany. and Interdisciplinary Center for Functional Particle Systems (FPS), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Haberstraße 9a, 91058 Erlangen, Germany
| |
Collapse
|
39
|
Kapp M, Li C, Xu Z, Boccaccini AR, Zheng K. Protein Adsorption on SiO 2-CaO Bioactive Glass Nanoparticles with Controllable Ca Content. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:561. [PMID: 33668192 PMCID: PMC7995967 DOI: 10.3390/nano11030561] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/16/2021] [Accepted: 02/16/2021] [Indexed: 12/19/2022]
Abstract
Bioactive glass nanoparticles (BGNs) are emerging multifunctional building blocks for various biomedical applications. In this study, the primary aim was to develop monodispersed binary SiO2-CaO BGNs with controllable Ca content. We successfully synthesized such spherical BGNs (size ~110 nm) using a modified Stöber method. Our results showed that the incorporated Ca did not significantly affect particle size, specific surface area, and structure of BGNs. Concentrations of CaO in BGN compositions ranging from 0 to 10 mol% could be obtained without the gap between actual and nominal compositions. For this type of BGNs (specific surface area 30 m2/g), the maximum concentration of incorporated CaO appeared to be ~12 mol%. The influence of Ca content on protein adsorption was investigated using bovine serum albumin (BSA) and lysozyme as model proteins. The amount of adsorbed proteins increased over time at the early stage of adsorption (<2 h), regardless of glass composition and protein type. Further incubation of BGNs with protein-containing solutions seemed to induce a reduced amount of adsorbed proteins, which was more significant in BGNs with higher Ca content. The results indicate that the Ca content in BGNs is related to their protein adsorption behavior.
Collapse
Affiliation(s)
- Martin Kapp
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (M.K.); (C.L.); (A.R.B.)
| | - Chunde Li
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (M.K.); (C.L.); (A.R.B.)
| | - Zeqian Xu
- Section Medical Materials Science & Technology, University Hospital Tübingen, 72076 Tübingen, Germany;
| | - Aldo R. Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (M.K.); (C.L.); (A.R.B.)
| | - Kai Zheng
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (M.K.); (C.L.); (A.R.B.)
| |
Collapse
|
40
|
Heiman-Burstein D, Dotan A, Dodiuk H, Kenig S. Hybrid Sol-Gel Superhydrophobic Coatings Based on Alkyl Silane-Modified Nanosilica. Polymers (Basel) 2021; 13:polym13040539. [PMID: 33673101 PMCID: PMC7918660 DOI: 10.3390/polym13040539] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/05/2021] [Accepted: 02/07/2021] [Indexed: 11/16/2022] Open
Abstract
Hybrid sol-gel superhydrophobic coatings based on alkyl silane-modified nanosilica were synthesized and studied. The hybrid coatings were synthesized using the classic Stöber process for producing hydrophilic silica nanoparticles (NPs) modified by the in-situ addition of long-chain alkyl silanes co-precursors in addition to the common tetraethyl orthosilicate (TEOS). It was demonstrated that the long-chain alkyl substituent silane induced a steric hindrance effect, slowing the alkylsilane self-condensation and allowing for the condensation of the TEOS to produce the silica NPs. Hence, following the formation of the silica NPs the alkylsilane reacted with the silica's hydroxyls to yield hybrid alkyl-modified silica NPs having superhydrophobic (SH) attributes. The resulting SH coatings were characterized by contact angle goniometry, demonstrating a more than 150° water contact angle, a water sliding angle of less than 5°, and a transmittance of more than 90%. Confocal microscopy was used to analyze the micro random surface morphology of the SH surface and to indicate the parameters related to superhydrophobicity. It was found that a SH coating could be obtained when the alkyl length exceeded ten carbons, exhibiting a raspberry-like hierarchical morphology.
Collapse
|
41
|
Effects of different secondary nano-scaled roughness on the properties of omniphobic membranes for brine treatment using membrane distillation. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118918] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
42
|
Zheng K, Sui B, Ilyas K, Boccaccini AR. Porous bioactive glass micro- and nanospheres with controlled morphology: developments, properties and emerging biomedical applications. MATERIALS HORIZONS 2021; 8:300-335. [PMID: 34821257 DOI: 10.1039/d0mh01498b] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In recent years, porous bioactive glass micro/nanospheres (PBGSs) have emerged as attractive biomaterials in various biomedical applications where such engineered particles provide suitable functions, from tissue engineering to drug delivery. The design and synthesis of PBGSs with controllable particle size and pore structure are critical for such applications. PBGSs have been successfully synthesized using melt-quenching and sol-gel based methods. The morphology of PBGSs is controllable by tuning the processing parameters and precursor characteristics during the synthesis. In this comprehensive review on PBGSs, we first overview the synthesis approaches for PBGSs, including both melt-quenching and sol-gel based strategies. Sol-gel processing is the primary technology used to produce PBGSs, allowing for control over the chemical compositions and pore structure of particles. Particularly, the influence of pore-forming templates on the morphology of PBGSs is highlighted. Recent progress in the sol-gel synthesis of PBGSs with sophisticated pore structures (e.g., hollow mesoporous, dendritic fibrous mesoporous) is also covered. The challenges regarding the control of particle morphology, including the influence of metal ion precursors and pore expansion, are discussed in detail. We also highlight the recent achievements of PBGSs in a number of biomedical applications, including bone tissue regeneration, wound healing, therapeutic agent delivery, bioimaging, and cancer therapy. Finally, we conclude with our perspectives on the directions of future research based on identified challenges and potential new developments and applications of PBGSs.
Collapse
Affiliation(s)
- Kai Zheng
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany.
| | | | | | | |
Collapse
|
43
|
Pouroutzidou GK, Liverani L, Theocharidou A, Tsamesidis I, Lazaridou M, Christodoulou E, Beketova A, Pappa C, Triantafyllidis KS, Anastasiou AD, Papadopoulou L, Bikiaris DN, Boccaccini AR, Kontonasaki E. Synthesis and Characterization of Mesoporous Mg- and Sr-Doped Nanoparticles for Moxifloxacin Drug Delivery in Promising Tissue Engineering Applications. Int J Mol Sci 2021; 22:E577. [PMID: 33430065 PMCID: PMC7827177 DOI: 10.3390/ijms22020577] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 12/30/2020] [Accepted: 01/04/2021] [Indexed: 02/07/2023] Open
Abstract
Mesoporous silica-based nanoparticles (MSNs) are considered promising drug carriers because of their ordered pore structure, which permits high drug loading and release capacity. The dissolution of Si and Ca from MSNs can trigger osteogenic differentiation of stem cells towards extracellular matrix calcification, while Mg and Sr constitute key elements of bone biology and metabolism. The aim of this study was the synthesis and characterization of sol-gel-derived MSNs co-doped with Ca, Mg and Sr. Their physico-chemical properties were investigated by X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray analysis (SEM/EDX), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray fluorescence spectroscopy (XRF), Brunauer Emmett Teller and Brunauer Joyner Halenda (BET/BJH), dynamic light scattering (DLS) and ζ-potential measurements. Moxifloxacin loading and release profiles were assessed with high performance liquid chromatography (HPLC) cell viability on human periodontal ligament fibroblasts and their hemolytic activity in contact with human red blood cells (RBCs) at various concentrations were also investigated. Doped MSNs generally retained their textural characteristics, while different compositions affected particle size, hemolytic activity and moxifloxacin loading/release profiles. All co-doped MSNs revealed the formation of hydroxycarbonate apatite on their surface after immersion in simulated body fluid (SBF) and promoted mitochondrial activity and cell proliferation.
Collapse
Affiliation(s)
- Georgia K. Pouroutzidou
- School of Physics, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (G.K.P.); (I.T.)
| | - Liliana Liverani
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (L.L.); (A.R.B.)
| | - Anna Theocharidou
- School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (A.T.); (A.B.)
| | - Ioannis Tsamesidis
- School of Physics, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (G.K.P.); (I.T.)
- Pharmadev, UMR 152, Université de Toulouse, IRD, UPS, 31400 Toulouse, France
| | - Maria Lazaridou
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (M.L.); (E.C.); (C.P.); (K.S.T.); (D.N.B.)
| | - Evi Christodoulou
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (M.L.); (E.C.); (C.P.); (K.S.T.); (D.N.B.)
| | - Anastasia Beketova
- School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (A.T.); (A.B.)
| | - Christina Pappa
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (M.L.); (E.C.); (C.P.); (K.S.T.); (D.N.B.)
| | - Konstantinos S. Triantafyllidis
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (M.L.); (E.C.); (C.P.); (K.S.T.); (D.N.B.)
- Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center, 57001 Thessaloniki, Greece
| | - Antonios D. Anastasiou
- Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester M1 3AL, UK;
| | - Lambrini Papadopoulou
- School of Geology, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
| | - Dimitrios N. Bikiaris
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (M.L.); (E.C.); (C.P.); (K.S.T.); (D.N.B.)
| | - Aldo R. Boccaccini
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (L.L.); (A.R.B.)
| | - Eleana Kontonasaki
- School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (A.T.); (A.B.)
- Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center, 57001 Thessaloniki, Greece
| |
Collapse
|
44
|
Prabha S, Durgalakshmi D, Rajendran S, Lichtfouse E. Plant-derived silica nanoparticles and composites for biosensors, bioimaging, drug delivery and supercapacitors: a review. ENVIRONMENTAL CHEMISTRY LETTERS 2021; 19:1667-1691. [PMID: 33199978 PMCID: PMC7658439 DOI: 10.1007/s10311-020-01123-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 10/17/2020] [Indexed: 05/05/2023]
Abstract
Silica nanoparticles have rapidly found applications in medicine, supercapacitors, batteries, optical fibers and concrete materials, because silica nanoparticles have tunable physical, chemical, optical and mechanical properties. In most applications, high-purity silica comes from synthetic organic precursors, yet this approach could be costly, polluting and non-biocompatible. Alternatively, natural silica sources from biomass are often cheap and abundant, yet they contain impurities. Silica can be extracted from corn cob, coffee husk, rice husk, sugarcane bagasse and wheat husk wastes, which are often disposed of in rivers, lands and ponds. These wastes can be used to prepare homogenous silica nanoparticles. Here we review properties, preparation and applications of silica nanoparticles. Preparation includes chemical and biomass methods. Applications include biosensors, bioimaging, drug delivery and supercapacitors. In particular, to fight the COVID-19 pandemic, recent research has shown that silver nanocluster/silica deposited on a mask reduces SARS-Cov-2 infectivity to zero.
Collapse
Affiliation(s)
- S. Prabha
- Department of Medical Physics, Anna University, Chennai, 600025 India
| | - D. Durgalakshmi
- Department of Medical Physics, Anna University, Chennai, 600025 India
| | - Saravanan Rajendran
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez, 1775 Arica, Chile
| | - Eric Lichtfouse
- Aix-Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Avenue Louis Philibert, 13100 Aix en Provence, France
- International Research Centre for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049 China
| |
Collapse
|
45
|
Kuzmenka D, Sewohl C, König A, Flath T, Hahnel S, Schulze FP, Hacker MC, Schulz-Siegmund M. Sustained Calcium(II)-Release to Impart Bioactivity in Hybrid Glass Scaffolds for Bone Tissue Engineering. Pharmaceutics 2020; 12:E1192. [PMID: 33302527 PMCID: PMC7764395 DOI: 10.3390/pharmaceutics12121192] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/04/2020] [Accepted: 12/05/2020] [Indexed: 12/24/2022] Open
Abstract
In this study, we integrated different calcium sources into sol-gel hybrid glass scaffolds with the aim of producing implants with long-lasting calcium release while maintaining mechanical strength of the implant. Calcium(II)-release was used to introduce bioactivity to the material and eventually support implant integration into a bone tissue defect. Tetraethyl orthosilicate (TEOS) derived silica sols were cross-linked with an ethoxysilylated 4-armed macromer, pentaerythritol ethoxylate and processed into macroporous scaffolds with defined pore structure by indirect rapid prototyping. Triethyl phosphate (TEP) was shown to function as silica sol solvent. In a first approach, we investigated the integration of 1 to 10% CaCl2 in order to test the hypothesis that small CaCl2 amounts can be physically entrapped and slowly released from hybrid glass scaffolds. With 5 and 10% CaCl2 we observed an extensive burst release, whereas slightly improved release profiles were found for lower Calcium(II) contents. In contrast, introduction of melt-derived bioactive 45S5 glass microparticles (BG-MP) into the hybrid glass scaffolds as another Calcium(II) source led to an approximately linear release of Calcium(II) in Tris(hydroxymethyl)aminomethane (TRIS) buffer over 12 weeks. pH increase caused by BG-MP could be controlled by their amount integrated into the scaffolds. Compression strength remained unchanged compared to scaffolds without BG-MP. In cell culture medium as well as in simulated body fluid, we observed a rapid formation of a carbonated hydroxyapatite layer on BG-MP containing scaffolds. However, this mineral layer consumed the released Calcium(II) ions and prevented an additional increase in Calcium(II) concentration in the cell culture medium. Cell culture studies on the different scaffolds with osteoblast-like SaOS-2 cells as well as bone marrow derived mesenchymal stem cells (hMSC) did not show any advantages concerning osteogenic differentiation due to the integration of BG-MP into the scaffolds. Nonetheless, via the formation of a hydroxyapatite layer and the ability to control the pH increase, we speculate that implant integration in vivo and bone regeneration may benefit from this concept.
Collapse
Affiliation(s)
- Dzmitry Kuzmenka
- Pharmaceutical Technology, Institute of Pharmacy, Faculty of Medicine, Leipzig University, 04317 Leipzig, Germany; (D.K.); (C.S.); (M.C.H.)
| | - Claudia Sewohl
- Pharmaceutical Technology, Institute of Pharmacy, Faculty of Medicine, Leipzig University, 04317 Leipzig, Germany; (D.K.); (C.S.); (M.C.H.)
| | - Andreas König
- Department of Prosthetic Dentistry and Dental Materials Science, Leipzig University, 04103 Leipzig, Germany; (A.K.); (S.H.)
| | - Tobias Flath
- Department of Mechanical and Energy Engineering, University of Applied Sciences Leipzig, 04277 Leipzig, Germany; (T.F.); (F.P.S.)
| | - Sebastian Hahnel
- Department of Prosthetic Dentistry and Dental Materials Science, Leipzig University, 04103 Leipzig, Germany; (A.K.); (S.H.)
| | - Fritz Peter Schulze
- Department of Mechanical and Energy Engineering, University of Applied Sciences Leipzig, 04277 Leipzig, Germany; (T.F.); (F.P.S.)
| | - Michael C. Hacker
- Pharmaceutical Technology, Institute of Pharmacy, Faculty of Medicine, Leipzig University, 04317 Leipzig, Germany; (D.K.); (C.S.); (M.C.H.)
- Institute of Pharmaceutics and Biopharmaceutics, Heinrich Heine University Duesseldorf, 40225 Duesseldorf, Germany
| | - Michaela Schulz-Siegmund
- Pharmaceutical Technology, Institute of Pharmacy, Faculty of Medicine, Leipzig University, 04317 Leipzig, Germany; (D.K.); (C.S.); (M.C.H.)
| |
Collapse
|
46
|
Well-defined polyester-grafted silica nanoparticles for biomedical applications: Synthesis and quantitative characterization. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.123048] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
47
|
Chen W, Karde V, Cheng TNH, Ramli SS, Heng JYY. Surface hydrophobicity: effect of alkyl chain length and network homogeneity. Front Chem Sci Eng 2020. [DOI: 10.1007/s11705-020-2003-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AbstractUnderstanding the nature of hydrophobicity has fundamental importance in environmental applications. Using spherical silica nanoparticles (diameter = 369 ± 7 nm) as the model material, the current study investigates the relationship between the alkyl chain network and hydro-phobicity. Two alkyl silanes with different chain length (triethoxymethylsilane (C1) vs. trimethoxy(octyl)silane (C8)) were utilised separately for the functionalisation of the nanoparticles. Water contact angle and inverse gas chromatography results show that the alkyl chain length is essential for controlling hydrophobicity, as the octyl-functionalised nanoparticles were highly hydrophobic (water contact angle = 150.6° ± 6.6°), whereas the methyl-functionalised nanoparticles were hydrophilic (i.e., water contact angle = 0°, similar to the pristine nanoparticles). The homogeneity of the octyl-chain network also has a significant effect on hydrophobicity, as the water contact angle was reduced significantly from 148.4° ± 3.5° to 30.5° ± 1.0° with a methyl-/octyl-silane mixture (ratio = 160:40 µL·g−1 nanoparticles).
Collapse
|
48
|
Page SJ, Gallo A, Brown SP, Lewandowski JR, Hanna JV, Franks WT. Simultaneous MQMAS NMR Experiments for Two Half-Integer Quadrupolar Nuclei. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2020; 320:106831. [PMID: 33022562 PMCID: PMC7661836 DOI: 10.1016/j.jmr.2020.106831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 06/11/2023]
Abstract
A procedure to acquire two Multiple-Quantum Magic Angle Spinning (MQMAS) NMR experiments with the same instrument time is presented. A triply tuned probe is utilized with multiple receivers to collect data with staggered acquisitions and thus more efficiently use the instrument time. The data for one nucleus is collected during the recovery delay of the other nucleus, and vice versa. The instrument time is reduced to 60-80% of the time needed for the single acquisition collection Specifically our approach is presented for recording triple-quantum (3Q) 17O and either 3Q or quintuple-quantum (5Q) 27Al MAS NMR spectra of a 1.18Na2O•5SiO2•Al2O3 glass gel.
Collapse
Affiliation(s)
- Samuel J Page
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Angelo Gallo
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Steven P Brown
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Józef R Lewandowski
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - John V Hanna
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - W Trent Franks
- Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom; Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom.
| |
Collapse
|
49
|
Renaissance of Stöber method for synthesis of colloidal particles: New developments and opportunities. J Colloid Interface Sci 2020; 584:838-865. [PMID: 33127050 DOI: 10.1016/j.jcis.2020.10.014] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 09/27/2020] [Accepted: 10/03/2020] [Indexed: 12/21/2022]
Abstract
Colloidal silica particles have received a widespread interest because of their potential applications in adsorption, ceramics, catalysis, drug delivery and more. Among many approaches towards fabrication of these colloidal particles, Stöber, Fink and Bohn (SFB) method, known as Stöber synthesis is an effective sol-gel strategy for production of uniform, monodispersed silica particles with highly tailorable size and surface properties. This review, after a brief introduction showing the importance of colloidal chemistry, is focused on the Stöber synthesis of silica spheres including discussion of the key factors affecting their particle size, porosity and surface properties. Next, further developments of this method are presented toward fabrication of polymer, carbon, and composite spheres.
Collapse
|
50
|
Kawaguchi M. Dispersion stability and rheological properties of silica suspensions in aqueous solutions. Adv Colloid Interface Sci 2020; 284:102248. [PMID: 32916455 DOI: 10.1016/j.cis.2020.102248] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 08/20/2020] [Accepted: 08/20/2020] [Indexed: 11/29/2022]
Abstract
This historical perspective overviews the dispersion stability and rheological properties of fumed and colloidal silica suspensions in aqueous solutions as a function of the volume fraction of silica (ϕ) (where ϕ is ≤0.1). The silica suspensions exist in a gel state at lower ϕ in acidic conditions than at alkaline pH. The steady-state shear viscosities of silica suspensions at acid conditions exhibit shear thinning behavior at lower ϕ than in alkaline conditions; the magnitudes of the dynamic moduli of the silica suspensions at acidic pH are larger than those at alkaline pH. Changes in the dispersion stability and rheological behavior of the silica suspensions may be attributable to the addition of salt, which decreases electrostatic repulsion. Furthermore, the effects of polymer adsorption on the dispersion stability and rheological behavior of hydrophilic or hydrophobic silica suspensions are discussed.
Collapse
Affiliation(s)
- Masami Kawaguchi
- Graduate School of Engineering, Mie University, 1577 Kurimamachiya, Tsu, Mie 514-8507, Japan.
| |
Collapse
|