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Optimisation of alendronate conjugation to polyethylene glycol for functionalisation of biopolymers and nanoparticles. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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De Coster V, Poelman H, Dendooven J, Detavernier C, Galvita VV. Designing Nanoparticles and Nanoalloys for Gas-Phase Catalysis with Controlled Surface Reactivity Using Colloidal Synthesis and Atomic Layer Deposition. Molecules 2020; 25:E3735. [PMID: 32824236 PMCID: PMC7464189 DOI: 10.3390/molecules25163735] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/10/2020] [Accepted: 08/14/2020] [Indexed: 11/17/2022] Open
Abstract
Supported nanoparticles are commonly applied in heterogeneous catalysis. The catalytic performance of these solid catalysts is, for a given support, dependent on the nanoparticle size, shape, and composition, thus necessitating synthesis techniques that allow for preparing these materials with fine control over those properties. Such control can be exploited to deconvolute their effects on the catalyst's performance, which is the basis for knowledge-driven catalyst design. In this regard, bottom-up synthesis procedures based on colloidal chemistry or atomic layer deposition (ALD) have proven successful in achieving the desired level of control for a variety of fundamental studies. This review aims to give an account of recent progress made in the two aforementioned synthesis techniques for the application of controlled catalytic materials in gas-phase catalysis. For each technique, the focus goes to mono- and bimetallic materials, as well as to recent efforts in enhancing their performance by embedding colloidal templates in porous oxide phases or by the deposition of oxide overlayers via ALD. As a recent extension to the latter, the concept of area-selective ALD for advanced atomic-scale catalyst design is discussed.
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Affiliation(s)
- Valentijn De Coster
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, 9052 Ghent, Belgium; (V.D.C.); (H.P.)
| | - Hilde Poelman
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, 9052 Ghent, Belgium; (V.D.C.); (H.P.)
| | - Jolien Dendooven
- Department of Solid State Sciences, CoCooN, Ghent University, Krijgslaan 281/S1, 9000 Ghent, Belgium; (J.D.); (C.D.)
| | - Christophe Detavernier
- Department of Solid State Sciences, CoCooN, Ghent University, Krijgslaan 281/S1, 9000 Ghent, Belgium; (J.D.); (C.D.)
| | - Vladimir V. Galvita
- Laboratory for Chemical Technology (LCT), Ghent University, Technologiepark 125, 9052 Ghent, Belgium; (V.D.C.); (H.P.)
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3
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Ozay H, Ilgin P, Ozyurt C, Ozay O. The single-step synthesis of thiol-functionalized phosphazene-based polymeric microspheres as drug carrier. POLYM-PLAST TECH MAT 2020. [DOI: 10.1080/25740881.2020.1784212] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Hava Ozay
- Laboratory of Inorganic Materials, Department of Chemistry, Faculty of Science and Arts, Canakkale Onsekiz Mart University, Canakkale, Turkey
| | - Pinar Ilgin
- Department of Chemistry and Chemical Processing Technologies, Lapseki Vocational School, Canakkale Onsekiz Mart University, Canakkale, Turkey
| | - Canan Ozyurt
- Department of Chemistry and Chemical Processing Technologies, Lapseki Vocational School, Canakkale Onsekiz Mart University, Canakkale, Turkey
| | - Ozgur Ozay
- Laboratory of Inorganic Materials, Department of Chemistry, Faculty of Science and Arts, Canakkale Onsekiz Mart University, Canakkale, Turkey
- Department of Bioengineering, Faculty of Engineering, Canakkale Onsekiz Mart University, Canakkale, Turkey
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Omachi H, Inoue T, Hatao S, Shinohara H, Criado A, Yoshikawa H, Syrgiannis Z, Prato M. Concise, Single‐Step Synthesis of Sulfur‐Enriched Graphene: Immobilization of Molecular Clusters and Battery Applications. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201913578] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Haruka Omachi
- Department of Chemistry Graduate School of Science Nagoya University, Chikusa Nagoya 464-8602 Japan
- Research Center for Materials Science Nagoya University, Chikusa Nagoya 464-8602 Japan
| | - Tsukasa Inoue
- Department of Chemistry Graduate School of Science Nagoya University, Chikusa Nagoya 464-8602 Japan
| | - Shuya Hatao
- Department of Nanotechnology for Sustainable Energy School of Science and Technology Kwansei Gakuin University Sanda 669-1337 Japan
| | - Hisanori Shinohara
- Department of Chemistry Graduate School of Science Nagoya University, Chikusa Nagoya 464-8602 Japan
| | - Alejandro Criado
- Carbon Bionanotechnology Group CICbiomaGUNE P° Miramón 182 20014 Guipúzcoa Spain
| | - Hirofumi Yoshikawa
- Department of Nanotechnology for Sustainable Energy School of Science and Technology Kwansei Gakuin University Sanda 669-1337 Japan
| | - Zois Syrgiannis
- Center of Excellence for Nanostructured Materials (CENMAT) INSTM Dipartimento di Scienze Chimiche e Farmanceutiche Università di Trieste Piazzale Europa, 1 34127 Trieste Italy
- Present Address: Simpson Querrey Institute Northwestern University 303 East Superior Street, 11th floor Chicago IL 60611 USA
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Maurizio Prato
- Carbon Bionanotechnology Group CICbiomaGUNE P° Miramón 182 20014 Guipúzcoa Spain
- Center of Excellence for Nanostructured Materials (CENMAT) INSTM Dipartimento di Scienze Chimiche e Farmanceutiche Università di Trieste Piazzale Europa, 1 34127 Trieste Italy
- Basque Foundation for Science Ikerbasque Bilbao 48013 Spain
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Omachi H, Inoue T, Hatao S, Shinohara H, Criado A, Yoshikawa H, Syrgiannis Z, Prato M. Concise, Single-Step Synthesis of Sulfur-Enriched Graphene: Immobilization of Molecular Clusters and Battery Applications. Angew Chem Int Ed Engl 2020; 59:7836-7841. [PMID: 32045508 PMCID: PMC7317581 DOI: 10.1002/anie.201913578] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 01/20/2020] [Indexed: 12/26/2022]
Abstract
The concise synthesis of sulfur-enriched graphene for battery applications is reported. The direct treatment of graphene oxide (GO) with the commercially available Lawesson's reagent produced sulfur-enriched-reduced GO (S-rGO). Various techniques, such as X-ray photoelectron spectroscopy (XPS), confirmed the occurrence of both sulfur functionalization and GO reduction. Also fabricated was a nanohybrid material by using S-rGO with polyoxometalate (POM) as a cathode-active material for a rechargeable battery. Transmission electron microscopy (TEM) revealed that POM clusters were individually immobilized on the S-rGO surface. This battery, based on a POM/S-rGO complex, exhibited greater cycling stability for the charge-discharge process than a battery with nanohybrid materials positioned between the POM and nonenriched rGO. These results demonstrate that the use of sulfur-containing groups on a graphene surface can be extended to applications such as the catalysis of electrochemical reactions and electrodes in other battery systems.
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Affiliation(s)
- Haruka Omachi
- Department of ChemistryGraduate School of ScienceNagoya University, ChikusaNagoya464-8602Japan
- Research Center for Materials ScienceNagoya University, ChikusaNagoya464-8602Japan
| | - Tsukasa Inoue
- Department of ChemistryGraduate School of ScienceNagoya University, ChikusaNagoya464-8602Japan
| | - Shuya Hatao
- Department of Nanotechnology for Sustainable EnergySchool of Science and TechnologyKwansei Gakuin UniversitySanda669-1337Japan
| | - Hisanori Shinohara
- Department of ChemistryGraduate School of ScienceNagoya University, ChikusaNagoya464-8602Japan
| | - Alejandro Criado
- Carbon Bionanotechnology GroupCICbiomaGUNEP° Miramón 18220014GuipúzcoaSpain
| | - Hirofumi Yoshikawa
- Department of Nanotechnology for Sustainable EnergySchool of Science and TechnologyKwansei Gakuin UniversitySanda669-1337Japan
| | - Zois Syrgiannis
- Center of Excellence for Nanostructured Materials (CENMAT)INSTMDipartimento di Scienze Chimiche e FarmanceuticheUniversità di TriestePiazzale Europa, 134127TriesteItaly
- Present Address: Simpson Querrey InstituteNorthwestern University303 East Superior Street, 11th floorChicagoIL60611USA
- Department of ChemistryNorthwestern University2145 Sheridan RoadEvanstonIL60208USA
| | - Maurizio Prato
- Carbon Bionanotechnology GroupCICbiomaGUNEP° Miramón 18220014GuipúzcoaSpain
- Center of Excellence for Nanostructured Materials (CENMAT)INSTMDipartimento di Scienze Chimiche e FarmanceuticheUniversità di TriestePiazzale Europa, 134127TriesteItaly
- Basque Foundation for ScienceIkerbasqueBilbao48013Spain
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Gubala V, Giovannini G, Kunc F, Monopoli MP, Moore CJ. Dye-doped silica nanoparticles: synthesis, surface chemistry and bioapplications. Cancer Nanotechnol 2020. [DOI: 10.1186/s12645-019-0056-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Abstract
Background
Fluorescent silica nanoparticles have been extensively utilised in a broad range of biological applications and are facilitated by their predictable, well-understood, flexible chemistry and apparent biocompatibility. The ability to couple various siloxane precursors with fluorescent dyes and to be subsequently incorporated into silica nanoparticles has made it possible to engineer these fluorophores-doped nanomaterials to specific optical requirements in biological experimentation. Consequently, this class of nanomaterial has been used in applications across immunodiagnostics, drug delivery and human-trial bioimaging in cancer research.
Main body
This review summarises the state-of-the-art of the use of dye-doped silica nanoparticles in bioapplications and firstly accounts for the common nanoparticle synthesis methods, surface modification approaches and different bioconjugation strategies employed to generate biomolecule-coated nanoparticles. The use of dye-doped silica nanoparticles in immunoassays/biosensing, bioimaging and drug delivery is then provided and possible future directions in the field are highlighted. Other non-cancer-related applications involving silica nanoparticles are also briefly discussed. Importantly, the impact of how the protein corona has changed our understanding of NP interactions with biological systems is described, as well as demonstrations of its capacity to be favourably manipulated.
Conclusions
Dye-doped silica nanoparticles have found success in the immunodiagnostics domain and have also shown promise as bioimaging agents in human clinical trials. Their use in cancer delivery has been restricted to murine models, as has been the case for the vast majority of nanomaterials intended for cancer therapy. This is hampered by the need for more human-like disease models and the lack of standardisation towards assessing nanoparticle toxicity. However, developments in the manipulation of the protein corona have improved the understanding of fundamental bio–nano interactions, and will undoubtedly assist in the translation of silica nanoparticles for disease treatment to the clinic.
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Wondergem CS, van Swieten TP, Geitenbeek RG, Erné BH, Weckhuysen BM. Extending Surface-Enhanced Raman Spectroscopy to Liquids Using Shell-Isolated Plasmonic Superstructures. Chemistry 2019; 25:15772-15778. [PMID: 31478273 DOI: 10.1002/chem.201903204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Indexed: 12/20/2022]
Abstract
Plasmonic superstructures (PS) based on Au/SiO2 were prepared for Shell-Isolated Nanoparticle-Enhanced Raman Spectroscopy (SHINERS) in liquid phase applications. These superstructures are composed of functionalized SiO2 spheres with plasmonic Au nanoparticles (NPs) on their surface. Functionalization was performed with (3-aminopropyl)trimethoxysilane, (3-mercaptopropyl)trimethoxysilane and poly(ethylene-imine) (PEI). Of these three, PEI-functionalized spheres showed the highest adsorption density of Au NPs in TEM, UV/Vis and dynamic light scattering (DLS) experiments. Upon decreasing the Au NP/SiO2 sphere size ratio, an increase in adsorption density was also observed. To optimize plasmonic activity, 61 nm Au NPs were adsorbed onto 900 nm SiO2 -PEI spheres and these PS were coated with an ultrathin layer (1-2 nm) of SiO2 to obtain Shell-Isolated Plasmonic Superstructures (SHIPS), preventing direct contact between Au NPs and the liquid medium. Zeta potential measurements, TEM and SHINERS showed that SiO2 coating was successful. The detection limit for SHINERS using SHIPS and a 638 nm laser was around 10-12 m of Rhodamine (10-15 m for uncoated PS), all with acquisition settings suitable for catalysis applications.
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Affiliation(s)
- Caterina S Wondergem
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, The Netherlands
| | - Thomas P van Swieten
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, The Netherlands
| | - Robin G Geitenbeek
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, The Netherlands
| | - Ben H Erné
- Van 't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, The Netherlands
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9
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Surface Functionalisation of Upconversion Nanoparticles with Different Moieties for Biomedical Applications. SURFACES 2018. [DOI: 10.3390/surfaces1010009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Lanthanide ion-doped upconversion nanoparticles (UCNPs) that can convert low-energy infrared photons into high-energy visible and ultraviolet photons, are becoming highly sought-after for advanced biomedical and biophotonics applications. Their unique luminescent properties enable UCNPs to be applied for diagnosis, including biolabeling, biosensing, bioimaging, and multiple imaging modality, as well as therapeutic treatments including photothermal and photodynamic therapy, bio-reductive chemotherapy and drug delivery. For the employment of the inorganic nanomaterials into biological environments, it is critical to bridge the gap in between nanoparticles and biomolecules via surface modifications and subsequent functionalisation. This work reviews the various ways to surface modify and functionalise UCNPs so as to impart different functional molecular groups to the UCNPs surfaces for a broad range of applications in biomedical areas. We discussed commonly used base functionalities, including carboxyl, amino and thiol moieties that are typically imparted to UCNP surfaces so as to provide further functional capacity.
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Asadpour S, Chamsaz M, Entezari MH, Haron MJ, Ghows N. On-line preconcentration of ultra-trace thallium(I) in water samples with titanium dioxide nanoparticles and determination by graphite furnace atomic absorption spectrometry. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2012.05.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Baars RJ, van Leeuwen YM, Hendrix Y, Velikov KP, Kegel WK, Philipse AP. Morphology-controlled functional colloids by heterocoagulation of zein and nanoparticles. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.04.042] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kundu S, Leelavathi A, Madras G, Ravishankar N. Room temperature growth of ultrathin Au nanowires with high areal density over large areas by in situ functionalization of substrate. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:12690-12695. [PMID: 25279505 DOI: 10.1021/la502899x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Although ultrathin Au nanowires (∼2 nm diameter) are expected to demonstrate several interesting properties, their extreme fragility has hampered their use in potential applications. One way to improve the stability is to grow them on substrates; however, there is no general method to grow these wires over large areas. The existing methods suffer from poor coverage and associated formation of larger nanoparticles on the substrate. Herein, we demonstrate a room temperature method for growth of these nanowires with high coverage over large areas by in situ functionalization of the substrate. Using control experiments, we demonstrate that an in situ functionalization of the substrate is the key step in controlling the areal density of the wires on the substrate. We show that this strategy works for a variety of substrates ranging like graphene, borosil glass, Kapton, and oxide supports. We present initial results on catalysis using the wires grown on alumina and silica beads and also extend the method to lithography-free device fabrication. This method is general and may be extended to grow ultrathin Au nanowires on a variety of substrates for other applications.
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Affiliation(s)
- Subhajit Kundu
- Materials Research Centre, and ‡Centre for Nanoscience and Engineering, and §Department of Chemical Engineering, Indian Institute of Science , C.V. Raman Avenue, Bangalore, India 560012
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Johari K, Saman N, Mat H. A comparative evaluation of mercury(II) adsorption equilibrium and kinetics onto silica gel and sulfur-functionalised silica gels adsorbents. CAN J CHEM ENG 2013. [DOI: 10.1002/cjce.21949] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Khairiraihanna Johari
- Advanced Materials and Process Engineering Laboratory, Faculty of Chemical Engineering; Universiti Teknologi Malaysia; 81310 UTM Skudai Johor Malaysia
| | - Norasikin Saman
- Advanced Materials and Process Engineering Laboratory, Faculty of Chemical Engineering; Universiti Teknologi Malaysia; 81310 UTM Skudai Johor Malaysia
| | - Hanapi Mat
- Advanced Materials and Process Engineering Laboratory, Faculty of Chemical Engineering; Universiti Teknologi Malaysia; 81310 UTM Skudai Johor Malaysia
- Novel Materials Research Group, Nanotechnology Research Alliance; Universiti Teknologi Malaysia; 81310 UTM Skudai Johor Malaysia
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Vieira EG, Soares IV, Dias Filho NL, da Silva NC, Garcia EF, Bastos AC, Perujo SD, Ferreira TT, Rosa AH, Fraceto LF. Preconcentration and determination of metal ions from fuel ethanol with a new 2,2′-dipyridylamine bonded silica. J Colloid Interface Sci 2013; 391:116-24. [DOI: 10.1016/j.jcis.2012.08.073] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 08/13/2012] [Accepted: 08/20/2012] [Indexed: 11/29/2022]
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Wu J, Coradin T, Aimé C. Reversible bioresponsive aptamer-based nanocomposites: ATP binding and removal from DNA-grafted silica nanoparticles. J Mater Chem B 2013; 1:5353-5359. [DOI: 10.1039/c3tb20499e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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16
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Aimé C, Mosser G, Pembouong G, Bouteiller L, Coradin T. Controlling the nano-bio interface to build collagen-silica self-assembled networks. NANOSCALE 2012; 4:7127-7134. [PMID: 23070474 DOI: 10.1039/c2nr31901b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Bio-hybrid networks are designed based on the self-assembly of surface-engineered collagen-silica nanoparticles. Collagen triple helices can be confined on the surface of sulfonate-modified silica particles in a controlled manner. This gives rise to hybrid building blocks with well-defined diameters and surface potentials. Taking advantage of the self-assembling properties of collagen, collagen-silica networks are further built-up in solution. The structural and specific recognition properties of the collagen fibrils are well-preserved within the hybrid assembly. A combination of calorimetry, dynamic light scattering, zetametry and microscopy studies indicates that network formation occurs via a surface-mediated mechanism where pre-organization of the protein chains on the particle surface favors the fibrillogenesis process. These results enlighten the importance of the nano-bio interface on the formation and properties of self-assembled bionanocomposites.
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Affiliation(s)
- Carole Aimé
- UPMC Univ Paris 06, CNRS, Chimie de la Matière Condensée de Paris Collège de France, 11 place Marcelin Berthelot, F-75005 Paris, France.
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Wu J, Silvent J, Coradin T, Aimé C. Biochemical investigation of the formation of three-dimensional networks from DNA-grafted large silica particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:2156-2165. [PMID: 22084966 DOI: 10.1021/la2037372] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
DNA is used to rationally build up networks of silica nanoparticles (SiNPs) based on the molecular recognition properties of complementary sequences. Network self-assembly is controlled from DNA covalently grafted at the surface of chemically modified SiNPs. Two strategies are compared, where grafted DNA sequences are designed in a three-strand system using noncomplementary sequences and an extra DNA linker, or in a two-strand approach for direct hybridization. In this paper, both systems are compared in terms of DNA hybridization stability, network size, and three-dimensional organization using a combination of dynamic light scattering and electron microscopy. The observed differences are discussed in terms of hybridization interactions between DNA sequences in particle-free systems through fluorescence, circular dichroism, and UV spectroscopy techniques.
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Affiliation(s)
- Jiangyu Wu
- UPMC-Université Paris 06, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris, Collège de France, 11 place Marcelin Berthelot, F-75005 Paris
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Kozlova D, Chernousova S, Knuschke T, Buer J, Westendorf AM, Epple M. Cell targeting by antibody-functionalized calcium phosphatenanoparticles. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm14683a] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Lu Z, Gao C, Zhang Q, Chi M, Howe JY, Yin Y. Direct assembly of hydrophobic nanoparticles to multifunctional structures. NANO LETTERS 2011; 11:3404-3412. [PMID: 21732588 DOI: 10.1021/nl201820r] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We present a general process that allows convenient production of multifunctional composite particles by direct self-assembly of hydrophobic nanoparticles on host nanostructures containing high-density surface thiol groups. Hydrophobic nanoparticles of various compositions and combinations can be directly assembled onto the host surface through the strong coordination interactions between metal cations and thiol groups. The resulting structures can be further conveniently overcoated with a layer of normal silica to stabilize the assemblies and render them highly dispersible in water for biomedical applications. As the entire fabrication process does not involve complicated surface modification procedures, the hydrophobic ligands on the nanoparticles are not disturbed significantly so that they retain their original properties such as highly efficient luminescence. Many complex composite nanostructures with tailored functions can be efficiently produced by using this versatile approach. For example, multifunctional nonspherical nanostructures can be efficiently produced by using mercapto-silica coated nano-objects of arbitrary shapes as hosts for immobilizing functional nanoparticles. Multilayer structures can also be achieved by repeating the mercapto-silica coating and nanoparticle immobilization processes. Such assembly approach will provide the research community a highly versatile, configurable, scalable, and reproducible process for the preparation of various multifunctional structures.
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Affiliation(s)
- Zhenda Lu
- Department of Chemistry, University of California, Riverside, California 92521, United States
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20
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Zhang L, Huang T, Liu X, Zhang M, Li K. Selective solid-phase extraction of trace thallium with nano-Al2O3 from environmental samples. JOURNAL OF ANALYTICAL CHEMISTRY 2011. [DOI: 10.1134/s1061934811040113] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Lu Z, Sun L, Nguyen K, Gao C, Yin Y. Formation mechanism and size control in one-pot synthesis of mercapto-silica colloidal spheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:3372-3380. [PMID: 21355589 DOI: 10.1021/la1048216] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Mercapto-silica spheres with controllable size from ∼150 nm to ∼3.5 μm and narrow size distribution have been prepared in water using a one-pot synthesis, in which 3-mercaptopropyltrimethoxysilane (MPS) was used as the sole silica source and ammonia as the base catalyst. The hydrolysis of MPS at the early stage of the reaction produces amphiphilic silicate species which initiate the self-emulsification of the system and lead to the formation of oil-in-water emulsion droplets. Further hydrolysis and condensation promote the nucleation and growth of the mercapto-silica spheres inside the emulsion droplets. These mercapto-silica spheres are both structurally and functionally different from typical silica particles prepared from silicon alkoxides. Understanding the formation mechanism allows systematic tuning of the size of mercapto-silica spheres in a wide range by changing the amount of precursor, the concentration of ammonia, the amount of additional surfactants, and the reaction time. We find that Ostwald ripening may occur quickly if the spheres are kept in the reaction solution, resulting in significant broadening of the particle size distribution. In order to obtain uniform and stable samples, it is important to quench the growth of the mercapto-silica spheres by separating them from the original reaction mixture and then storing them in solvents that can prevent further ripening.
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Affiliation(s)
- Zhenda Lu
- Department of Chemistry, University of California, Riverside, California 92521, USA
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Baruah S, Mahmood MA, Myint MTZ, Bora T, Dutta J. Enhanced visible light photocatalysis through fast crystallization of zinc oxide nanorods. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2010; 1:14-20. [PMID: 21977391 PMCID: PMC3045919 DOI: 10.3762/bjnano.1.3] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Accepted: 10/26/2010] [Indexed: 05/22/2023]
Abstract
Hydrothermally grown ZnO nanorods have inherent crystalline defects primarily due to oxygen vacancies that enhance optical absorption in the visible spectrum, opening up possibilities for visible light photocatalysis. Comparison of photocatalytic activity of ZnO nanorods and nanoparticle films on a test contaminant methylene blue with visible light irradiation at 72 kilolux (klx) showed that ZnO nanorods are 12-24% more active than ZnO nanoparticulate films. This can be directly attributed to the increased effective surface area for adsorption of target contaminant molecules. Defects, in the form of interstitials and vacancies, were intentionally created by faster growth of the nanorods by microwave activation. Visible light photocatalytic activity was observed to improve by ≈8% attributed to the availability of more electron deficient sites on the nanorod surfaces. Engineered defect creation in nanostructured photocatalysts could be an attractive solution for visible light photocatalysis.
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Affiliation(s)
- Sunandan Baruah
- Center of Excellence in Nanotechnology, School of Engineering and Technology, Asian Institute of Technology, Klong Luang, Pathumthani 12120, Thailand. Phone: +66 2 524 5680, Fax: +66 2 524 5617
| | - Mohammad Abbas Mahmood
- Center of Excellence in Nanotechnology, School of Engineering and Technology, Asian Institute of Technology, Klong Luang, Pathumthani 12120, Thailand. Phone: +66 2 524 5680, Fax: +66 2 524 5617
| | - Myo Tay Zar Myint
- Center of Excellence in Nanotechnology, School of Engineering and Technology, Asian Institute of Technology, Klong Luang, Pathumthani 12120, Thailand. Phone: +66 2 524 5680, Fax: +66 2 524 5617
| | - Tanujjal Bora
- Center of Excellence in Nanotechnology, School of Engineering and Technology, Asian Institute of Technology, Klong Luang, Pathumthani 12120, Thailand. Phone: +66 2 524 5680, Fax: +66 2 524 5617
| | - Joydeep Dutta
- Center of Excellence in Nanotechnology, School of Engineering and Technology, Asian Institute of Technology, Klong Luang, Pathumthani 12120, Thailand. Phone: +66 2 524 5680, Fax: +66 2 524 5617
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Planken KL, Kuipers BWM, Philipse AP. Model Independent Determination of Colloidal Silica Size Distributions via Analytical Ultracentrifugation. Anal Chem 2008; 80:8871-9. [DOI: 10.1021/ac801556t] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karel L. Planken
- Van ’t Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Bonny W. M. Kuipers
- Van ’t Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Albert P. Philipse
- Van ’t Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
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Sorption of thallium(III) ions from aqueous solutions using titanium dioxide nanoparticles. Mikrochim Acta 2008. [DOI: 10.1007/s00604-008-0100-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ichimura K, Funabiki A, Aoki KI, Akiyama H. Solid phase adsorption of crystal violet lactone on silica nanoparticles to probe mechanochemical surface modification. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:6470-6479. [PMID: 18537277 DOI: 10.1021/la8002178] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The solid phase adsorption of crystal violet lactone (CVL) on five types of Stober silica nanopowders with BET specific surface areas in the range of 50-800 m2/g under dry milling conditions was described for the first time. The hydrogen bonding between surface silanol and the carboxylate of the ring-opened triphenylmethane dye (CVL+) led to the formation of monolayers of CVL+ in a flat-laid configuration. The lambda max of CVL+ in diffusive reflection visible spectra was influenced by the particle size of silica powders, suggesting that the microenvironmental polarity of adsorbed CVL+ is considerably reduced along with the decrease of the particle size. The solid phase adsorption of CVL obeyed Langmuir adsorption isotherms to give a saturated amount of CVL+ for every silica nanoparticle. The surface concentration of CVL+ on nanoparticles at the saturation was estimated to be 0.31 mg/m2 on average, disclosing that about 52% of the surface can be covered by CVL+ under the assumption that the BET-specific surface areas are equivalent to the real surfaces active for the CVL adsorption. The generation of the blue color of CVL provided a convenient means to estimate qualitative and quantitative analysis of the surface coverage with surface-active reagents, which conceal surface silanols. Subsequently, silica nanoparticles were milled with a surface modifier, followed by milling with CVL to observe the intensity of the blue color in order to disclose that the surface coverage with oligo- and polyethylene glycols as well as with nonionic surfactants by dry milling was specifically determined by the number of repeating oxyethylene units. Although the surface-active reagents were easily desorbed in water, the desorption was notably suppressed by milling with CVL, suggesting that the surface-modified particles with the surface-active reagents are covered with ultrathin films of CVL.
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Affiliation(s)
- Kunihiro Ichimura
- Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
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Baruah S, Thanachayanont C, Dutta J. Growth of ZnO nanowires on nonwoven polyethylene fibers. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2008; 9:025009. [PMID: 27877984 PMCID: PMC5099741 DOI: 10.1088/1468-6996/9/2/025009] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Revised: 06/13/2008] [Accepted: 01/28/2008] [Indexed: 05/20/2023]
Abstract
We report the growth of ZnO nanowires on nonwoven polyethylene fibers using a simple hydrothermal method at a temperature below the boiling point of water. The ZnO nanowires were grown from seed ZnO nanoparticles affixed onto the fibers. The seed ZnO nanoparticles, with diameters of about 6-7 nm, were synthesized in isopropanol by reducing zinc acetate hydrate with sodium hydroxide. The growth process was carried out in a sealed chemical bath containing an equimolar solution of zinc nitrate hexahydrate and hexamethylene tetramine at a temperature of 95 °C over a period of up to 20 h. The thickness and length of the nanowires can be controlled by using different concentrations of the starting reactants and growth durations. A 0.5 mM chemical bath yielded nanowires with an average diameter of around 50 nm, while a 25 mM bath resulted in wires with a thickness of up to about 1 μm. The length of the wires depends both on the concentration of the precursor solution as well as the growth duration, and in 20 h, nanowires as long as 10 μm can be grown. The nonwoven mesh of polyethylene fibers covered with ZnO nanowires can be used for novel applications such as water treatment by degrading pollutants by photocatalysis. Photocatalysis tests carried out on standard test contaminants revealed that the polyethylene fibers with ZnO nanowires grown on them could accelerate the photocatalytic degradation process by a factor of 3.
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Affiliation(s)
- Sunandan Baruah
- NANOTEC Centre of Excellence in Nanotechnology at AIT, School of Engineering and Technology, Asian Institute of Technology, PO Box 4, Klong Luang, Pathumthani 12120, Thailand
| | - Chanchana Thanachayanont
- National Metal and Materials Technology Center, 114 Thailand Science Park, Phaholyothin Road, Klong 1, Klong Luang, Pathumthani 12120, Thailand
| | - Joydeep Dutta
- NANOTEC Centre of Excellence in Nanotechnology at AIT, School of Engineering and Technology, Asian Institute of Technology, PO Box 4, Klong Luang, Pathumthani 12120, Thailand
- E-mail:
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Shang W, Nuffer JH, Dordick JS, Siegel RW. Unfolding of ribonuclease A on silica nanoparticle surfaces. NANO LETTERS 2007; 7:1991-5. [PMID: 17559285 DOI: 10.1021/nl070777r] [Citation(s) in RCA: 193] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
This paper reports on the unfolding behavior of ribonuclease A (RNase A) on silica nanoparticle surfaces and quantitively demonstrates that nanoscale size and surface curvature play key roles in influencing the stability of adsorbed proteins. Urea denaturation analyses showed that the thermodynamic stability of RNase A decreased upon adsorption onto the nanoparticles, with greater decrease on larger nanoparticles. The stability changes of RNase A correlate well with the changes in the protein-nanoparticle interactions, which increase as the surface contact area and surface charge interaction increases. This study, therefore, provides fundamental information on the effect of nanoscale surfaces on protein structure and function.
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Affiliation(s)
- Wen Shang
- Rensselaer Nanotechnology Center, Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
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