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Otieno W, Brilliantov NV, Krapivsky PL. Supercluster states and phase transitions in aggregation-fragmentation processes. Phys Rev E 2023; 108:044142. [PMID: 37978667 DOI: 10.1103/physreve.108.044142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 09/14/2023] [Indexed: 11/19/2023]
Abstract
We study the evolution of aggregates triggered by collisions with monomers that either lead to the attachment of monomers or the break-up of aggregates into constituting monomers. Depending on parameters quantifying addition and break-up rates, the system falls into a jammed or a steady state. Supercluster states (SCSs) are very peculiar nonextensive jammed states that also arise in some models. Fluctuations underlie the formation of the SCSs. Conventional tools, such as the van Kampen expansion, apply to small fluctuations. We go beyond the van Kampen expansion and determine a set of critical exponents quantifying SCSs. We observe continuous and discontinuous phase transitions between the states. Our theoretical predictions are in good agreement with numerical results.
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Affiliation(s)
- Wendy Otieno
- Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom
| | - Nikolai V Brilliantov
- Skolkovo Institute of Science and Technology, Moscow 121205, Russia
- Department of Mathematics, University of Leicester, Leicester LE1 7RH, United Kingdom
| | - P L Krapivsky
- Department of Physics, Boston University, Boston, Massachusetts 02215, USA
- Santa Fe Institute, Santa Fe, New Mexico 87501, USA
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2
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One-step synthesis and stabilization of Au, Ag and Au-Ag nanoparticles with an ion-exchange polymer contained amide and carboxylic acid functional groups. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3
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Brilliantov NV, Otieno W, Krapivsky PL. Nonextensive Supercluster States in Aggregation with Fragmentation. PHYSICAL REVIEW LETTERS 2021; 127:250602. [PMID: 35029448 DOI: 10.1103/physrevlett.127.250602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 10/13/2021] [Accepted: 10/27/2021] [Indexed: 06/14/2023]
Abstract
Systems evolving through aggregation and fragmentation may possess an intriguing supercluster state (SCS). Clusters constituting this state are mostly very large, so the SCS resembles a gelling state, but the formation of the SCS is controlled by fluctuations and in this aspect, it is similar to a critical state. The SCS is nonextensive, that is, the number of clusters varies sublinearly with the system size. In the parameter space, the SCS separates equilibrium and jamming (extensive) states. The conventional methods, such as, e.g., the van Kampen expansion, fail to describe the SCS. To characterize the SCS we propose a scaling approach with a set of critical exponents. Our theoretical findings are in good agreement with numerical results.
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Affiliation(s)
- Nikolai V Brilliantov
- Skolkovo Institute of Science and Technology, 143026 Moscow, Russia
- Department of Mathematics, University of Leicester, Leicester LE1 7RH, United Kingdom
| | - Wendy Otieno
- Department of Mathematics, University of Leicester, Leicester LE1 7RH, United Kingdom
| | - P L Krapivsky
- Skolkovo Institute of Science and Technology, 143026 Moscow, Russia
- Department of Physics, Boston University, Boston, Massachusetts 02215, USA
- Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, New Mexico 87501, USA
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4
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Sawaguchi A, Kamimura T, Takahashi N, Yamashita A, Asada Y, Imazato H, Aoyama F, Wakui A, Sato T, Choijookhuu N, Hishikawa Y. In situ strategy for biomedical target localization via nanogold nucleation and secondary growth. Commun Biol 2021; 4:710. [PMID: 34112923 PMCID: PMC8192519 DOI: 10.1038/s42003-021-02246-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 05/19/2021] [Indexed: 01/20/2023] Open
Abstract
Immunocytochemistry visualizes the exact spatial location of target molecules. The most common strategy for ultrastructural immunocytochemistry is the conjugation of nanogold particles to antibodies as probes. However, conventional nanogold labelling requires time-consuming nanogold probe preparation and ultrathin sectioning of cell/tissue samples. Here, we introduce an in situ strategy involving nanogold nucleation in immunoenzymatic products on universal paraffin/cryostat sections and provide unique insight into nanogold development under hot-humid air conditions. Nanogold particles were specifically localized on kidney podocytes to target synaptopodin. Transmission electron microscopy revealed secondary growth and self-assembly that could be experimentally controlled by bovine serum albumin stabilization and phosphate-buffered saline acceleration. Valuable retrospective nanogold labelling for gastric H+/K+-ATPase was achieved on vintage immunoenzymatic deposits after a long lapse of 15 years (i.e., 15-year-old deposits). The present in situ nanogold labelling is anticipated to fill the gap between light and electron microscopy to correlate cell/tissue structure and function.
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Affiliation(s)
- Akira Sawaguchi
- Division of Ultrastructural Cell Biology, Department of Anatomy, University of Miyazaki, Miyazaki, Japan.
| | | | - Nobuyasu Takahashi
- Division of Ultrastructural Cell Biology, Department of Anatomy, University of Miyazaki, Miyazaki, Japan
| | - Atsushi Yamashita
- Division of Pathophysiology, Department of Pathology, University of Miyazaki, Miyazaki, Japan
| | - Yujiro Asada
- Division of Pathophysiology, Department of Pathology, University of Miyazaki, Miyazaki, Japan
| | - Hiroyuki Imazato
- Division of Orthopedic Surgery, Department of Medicine of Sensory and Motor Organs, University of Miyazaki, Miyazaki, Japan
| | - Fumiyo Aoyama
- Division of Ultrastructural Cell Biology, Department of Anatomy, University of Miyazaki, Miyazaki, Japan
| | | | | | - Narantsog Choijookhuu
- Division of Histochemical Cell Biology, Department of Anatomy, University of Miyazaki, Miyazaki, Japan
| | - Yoshitaka Hishikawa
- Division of Histochemical Cell Biology, Department of Anatomy, University of Miyazaki, Miyazaki, Japan
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A Facile One-Pot Synthesis of Versatile PEGylated Platinum Nanoflowers and Their Application in Radiation Therapy. Int J Mol Sci 2020; 21:ijms21051619. [PMID: 32120829 PMCID: PMC7084439 DOI: 10.3390/ijms21051619] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/22/2020] [Accepted: 02/24/2020] [Indexed: 12/19/2022] Open
Abstract
Nanomedicine has stepped into the spotlight of radiation therapy over the last two decades. Nanoparticles (NPs), especially metallic NPs, can potentiate radiotherapy by specific accumulation into tumors, thus enhancing the efficacy while alleviating the toxicity of radiotherapy. Water radiolysis is a simple, fast and environmentally-friendly method to prepare highly controllable metallic nanoparticles in large scale. In this study, we used this method to prepare biocompatible PEGylated (with Poly(Ethylene Glycol) diamine) platinum nanoflowers (Pt NFs). These nanoagents provide unique surface chemistry, which allows functionalization with various molecules such as fluorescent markers, drugs or radionuclides. The Pt NFs were produced with a controlled aggregation of small Pt subunits through a combination of grafted polymers and radiation-induced polymer cross-linking. Confocal microscopy and fluorescence lifetime imaging microscopy revealed that Pt NFs were localized in the cytoplasm of cervical cancer cells (HeLa) but not in the nucleus. Clonogenic assays revealed that Pt NFs amplify the gamma rays induced killing of HeLa cells with a sensitizing enhancement ratio (SER) of 23%, thus making them promising candidates for future cancer radiation therapy. Furthermore, the efficiency of Pt NFs to induce nanoscopic biomolecular damage by interacting with gamma rays, was evaluated using plasmids as molecular probe. These findings show that the Pt NFs are efficient nano-radio-enhancers. Finally, these NFs could be used to improve not only the performances of radiation therapy treatments but also drug delivery and/or diagnosis when functionalized with various molecules.
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Sultana S, Alzahrani N, Alzahrani R, Alshamrani W, Aloufi W, Ali A, Najib S, Siddiqui NA. Stability issues and approaches to stabilised nanoparticles based drug delivery system. J Drug Target 2020; 28:468-486. [PMID: 31984810 DOI: 10.1080/1061186x.2020.1722137] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Nanoparticles form the fundamental building blocks for many exciting applications in various scientific disciplines due to its unique features such as large surface to mass ratio, targeting potential, ability to adsorbed and carry other compound which makes them suitable for biomedical applications. However, the problem of the large-scale synthesis of nanoparticles remains challenging due to physical instability associated with nanoparticles which lead to generation of aggregates particles with high polydispersity index (PDI) indicating low particle homogeneity and eventually loss of their special nanoscale properties. The stabilisation concept can be generated by repulsive electrostatic force, which nanoparticles experience, when they are surrounded by a double layer of electric charges. Selection of proper stabiliser will govern the stability of NPs and ultimately development of optimised drug delivery system. This review summarises mechanism of physical instability issues likely to be encountered during the development of nanoformulations. It also discusses potential stabilising agents used so far and their mechanism in achieving stable nanosystems.
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Affiliation(s)
| | | | | | | | - Waad Aloufi
- Pharmaceutics, Taif University, Taif, Saudi Arabia
| | - Amena Ali
- Pharmaceutical Chemistry, Taif University, Taif, Saudi Arabia
| | - Shehla Najib
- Pharmacognosy and Phytochemistry, King Khalid University, Abha, Saudi Arabia
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Kusumawati EN, Nishio-Hamane D, Sasaki T. Size-controllable gold nanoparticles prepared from immobilized gold-containing ionic liquids on SBA-15. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.09.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Krapivsky PL, Otieno W, Brilliantov NV. Phase transitions in systems with aggregation and shattering. Phys Rev E 2018; 96:042138. [PMID: 29347546 DOI: 10.1103/physreve.96.042138] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Indexed: 11/07/2022]
Abstract
We consider a system of clusters made of elementary building blocks, monomers, and evolving via collisions between diffusing monomers and immobile composite clusters. In our model, the cluster-monomer collision can lead to the attachment of the monomer to the cluster (addition process) or to the total breakup of the cluster (shattering process). A phase transition, separating qualitatively different behaviors, occurs when the probability of shattering events exceeds a certain threshold. The novel feature of the phase transition is the dramatic dependence on the initial conditions.
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Affiliation(s)
- P L Krapivsky
- Department of Physics, Boston University, Boston, Massachusetts 02215, USA
| | - W Otieno
- Department of Mathematics, University of Leicester, Leicester LE1 7RH, United Kingdom
| | - N V Brilliantov
- Department of Mathematics, University of Leicester, Leicester LE1 7RH, United Kingdom
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Fernández-Llamosas H, Castro L, Blázquez ML, Díaz E, Carmona M. Speeding up bioproduction of selenium nanoparticles by using Vibrio natriegens as microbial factory. Sci Rep 2017; 7:16046. [PMID: 29167550 PMCID: PMC5700131 DOI: 10.1038/s41598-017-16252-1] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 11/10/2017] [Indexed: 11/09/2022] Open
Abstract
Selenium and selenium nanoparticles (SeNPs) are extensively used in biomedicine, electronics and some other industrial applications. The bioproduction of SeNPs is gaining interest as a green method to manufacture these biotechnologically relevant products. Several microorganisms have been used for the production of SeNPs either under aerobic or anaerobic conditions. Vibrio natriegens is a non-pathogenic fast-growing bacterium, easily cultured in different carbon sources and that has recently been engineered for easy genetic manipulation in the laboratory. Here we report that V. natriegens was able to perfectly grow aerobically in the presence of selenite concentrations up to 15 mM with a significant survival still observed at concentrations as high as 100 mM selenite. Electron microscopy and X-ray spectroscopy analyses demonstrate that V. natriegens cells growing aerobically in selenite-containing LB medium at 30 °C produced spherical electron-dense SeNPs whose size ranged from 100-400 nm. Selenite reduction just started at the beginning of the exponential growth phase and the release of SeNPs was observed after cell lysis. Remarkably, V. natriegens produced SeNPs faster than other described microorganisms that were proposed as model bioreactors for SeNPs production. Thus, the fast-growing V. natriegens bacterium becomes a suitable biocatalyst for bioremediation of selenite and for speeding-up the eco-friendly synthesis of SeNPs.
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Affiliation(s)
- Helga Fernández-Llamosas
- Environmental Biology Department, Centro de Investigaciones Biológicas-CSIC, Ramiro de Maeztu 9, 28040, Madrid, Spain
| | - Laura Castro
- Department of Material Science and Metallurgical Engineering, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Av. Complutense s/n, 28040, Madrid, Spain
| | - María Luisa Blázquez
- Department of Material Science and Metallurgical Engineering, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Av. Complutense s/n, 28040, Madrid, Spain
| | - Eduardo Díaz
- Environmental Biology Department, Centro de Investigaciones Biológicas-CSIC, Ramiro de Maeztu 9, 28040, Madrid, Spain
| | - Manuel Carmona
- Environmental Biology Department, Centro de Investigaciones Biológicas-CSIC, Ramiro de Maeztu 9, 28040, Madrid, Spain.
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Gonzalez-Gil G, Lens PNL, Saikaly PE. Selenite Reduction by Anaerobic Microbial Aggregates: Microbial Community Structure, and Proteins Associated to the Produced Selenium Spheres. Front Microbiol 2016; 7:571. [PMID: 27199909 PMCID: PMC4844624 DOI: 10.3389/fmicb.2016.00571] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 04/05/2016] [Indexed: 12/22/2022] Open
Abstract
Certain types of anaerobic granular sludge, which consists of microbial aggregates, can reduce selenium oxyanions. To envisage strategies for removing those oxyanions from wastewater and recovering the produced elemental selenium (Se(0)), insights into the microbial community structure and synthesis of Se(0) within these microbial aggregates are required. High-throughput sequencing showed that Veillonellaceae (c.a. 20%) and Pseudomonadaceae (c.a.10%) were the most abundant microbial phylotypes in selenite reducing microbial aggregates. The majority of the Pseudomonadaceae sequences were affiliated to the genus Pseudomonas. A distinct outer layer (∼200 μm) of selenium deposits indicated that bioreduction occurred in the outer zone of the microbial aggregates. In that outer layer, SEM analysis showed abundant intracellular and extracellular Se(0) (nano)spheres, with some cells having high numbers of intracellular Se(0) spheres. Electron tomography showed that microbial cells can harbor a single large intracellular sphere that stretches the cell body. The Se(0) spheres produced by the microorganisms were capped with organic material. X-ray photoelectron spectroscopy (XPS) analysis of extracted Se(0) spheres, combined with a mathematical approach to analyzing XPS spectra from biological origin, indicated that proteins and lipids were components of the capping material associated to the Se(0) spheres. The most abundant proteins associated to the spheres were identified by proteomic analysis. Most of the proteins or peptide sequences capping the Se(0) spheres were identified as periplasmic outer membrane porins and as the cytoplasmic elongation factor Tu protein, suggesting an intracellular formation of the Se(0) spheres. In view of these and previous findings, a schematic model for the synthesis of Se(0) spheres by the microorganisms inhabiting the granular sludge is proposed.
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Affiliation(s)
- Graciela Gonzalez-Gil
- Division of Biological and Environmental Sciences and Engineering, Water Desalination and Reuse Center, King Abdullah University of Science and TechnologyThuwal, Saudi Arabia; Department of Environmental Engineering and Water Technology, UNESCO-IHE Institute for Water EducationDelft, Netherlands
| | - Piet N L Lens
- Department of Environmental Engineering and Water Technology, UNESCO-IHE Institute for Water Education Delft, Netherlands
| | - Pascal E Saikaly
- Division of Biological and Environmental Sciences and Engineering, Water Desalination and Reuse Center, King Abdullah University of Science and Technology Thuwal, Saudi Arabia
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Polte J. Fundamental growth principles of colloidal metal nanoparticles – a new perspective. CrystEngComm 2015. [DOI: 10.1039/c5ce01014d] [Citation(s) in RCA: 416] [Impact Index Per Article: 46.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In the past few decades, much effort was put into the development of synthetic strategies to produce nanoparticles of different sizes and morphologies and a large number of scientific contributions are dedicated to the characterization and application of metal nanoparticles.
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Affiliation(s)
- Jörg Polte
- Humboldt-Universität zu Berlin
- Department of Chemistry
- 12489 Berlin, Germany
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13
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Kumar A, Sevonkaev I, Goia DV. Synthesis of selenium particles with various morphologies. J Colloid Interface Sci 2014; 416:119-23. [DOI: 10.1016/j.jcis.2013.10.046] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/21/2013] [Indexed: 11/24/2022]
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Sevonkaev I, Privman V, Goia D. Growth of highly crystalline nickel particles by diffusional capture of atoms. J Chem Phys 2013; 138:014703. [DOI: 10.1063/1.4772743] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wang T, LaMontagne D, Lynch J, Zhuang J, Cao YC. Colloidal superparticles from nanoparticle assembly. Chem Soc Rev 2013; 42:2804-23. [DOI: 10.1039/c2cs35318k] [Citation(s) in RCA: 204] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Sevonkaev I, Privman V, Goia D. Synthesis of dispersed metal particles for applications in photovoltaics, catalysis, and electronics. J Solid State Electrochem 2012. [DOI: 10.1007/s10008-012-1954-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Wang Y, Zhu Z, Xu F, Wei X. One-pot reaction to synthesize superparamagnetic iron oxide nanoparticles by adding phenol as reducing agent and stabilizer. JOURNAL OF NANOPARTICLE RESEARCH 2012; 14:755. [PMID: 0 DOI: 10.1007/s11051-012-0755-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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Uskoković V, Uskoković DP. Nanosized hydroxyapatite and other calcium phosphates: Chemistry of formation and application as drug and gene delivery agents. J Biomed Mater Res B Appl Biomater 2010; 96:152-91. [DOI: 10.1002/jbm.b.31746] [Citation(s) in RCA: 389] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Huang Y, Pemberton JE. Synthesis of uniform, spherical sub-100nm silica particles using a conceptual modification of the classic LaMer model. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.02.031] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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