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Lin Z, Haataja JS, Hu X, Hong X, Ikkala O, Peng B. Randomizing the growth of silica nanofibers for whiteness. CELL REPORTS. PHYSICAL SCIENCE 2024; 5:102021. [PMID: 38947181 PMCID: PMC11211975 DOI: 10.1016/j.xcrp.2024.102021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 04/22/2024] [Accepted: 05/10/2024] [Indexed: 07/02/2024]
Abstract
In colloids, the shape influences the function. In silica, straight nanorods have already been synthesized from water-in-oil emulsions. By contrast, curly silica nanofibers have been less reported because the underlying growth mechanism remains unexplored, hindering further morphology control for applications. Herein, we describe the synthetic protocol for silica nanofibers with a tunable curliness based on the control of the water-in-oil emulsion droplets. Systematically decreasing the droplet size and increasing their contact angle, the Brownian motion of the droplets intensifies during the silica growth, thus increasing the random curliness of the nanofibers. This finding is supported by simplistic theoretical arguments and experimentally verified by varying the temperature to finely tune the curliness. Assembling these nanofibers toward porous disordered films enhances multiple scattering in the visible range, resulting in increased whiteness in contrast to films constructed by spherical and rod-like building units, which can be useful for, e.g., coatings and pigments.
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Affiliation(s)
- Zhen Lin
- Department of Applied Physics, Aalto University, P.O. Box 15100, 02150 Espoo, Finland
- Department of Materials Science, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai 200433, China
| | - Johannes S. Haataja
- Department of Applied Physics, Aalto University, P.O. Box 15100, 02150 Espoo, Finland
| | - Xichen Hu
- Department of Applied Physics, Aalto University, P.O. Box 15100, 02150 Espoo, Finland
- Department of Materials Science, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai 200433, China
| | - Xiaodan Hong
- Department of Applied Physics, Aalto University, P.O. Box 15100, 02150 Espoo, Finland
| | - Olli Ikkala
- Department of Applied Physics, Aalto University, P.O. Box 15100, 02150 Espoo, Finland
| | - Bo Peng
- Department of Applied Physics, Aalto University, P.O. Box 15100, 02150 Espoo, Finland
- Department of Materials Science, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai 200433, China
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2
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Abdulazeez I, Alrajjal AS, Ganiyu S, Baig N, Salhi B, AbdElazem S. Facile engineering of mesoporous silica for the effective removal of anionic dyes from wastewater: Insights from DFT and experimental studies. Heliyon 2023; 9:e21356. [PMID: 37920496 PMCID: PMC10618791 DOI: 10.1016/j.heliyon.2023.e21356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 10/10/2023] [Accepted: 10/19/2023] [Indexed: 11/04/2023] Open
Abstract
The discharge of dye effluents from the textile industries has become a major environmental issue due to its potential to impart serious harm to human health and aquatic life. Mesoporous silica due to its high chemical stability, large surface area, tunable morphologies, large pore volume and pore size and cost-effectiveness is commonly used to remove such dyes before recycling of the wastewater for agricultural, domestic, and industrial applications. However, the low colloidal stability, the fast aggregation of the silica particles and the slow etching of the silica surface often results in the fast deactivation of the adsorbents and limits their long-term applications. In this study, we report the functionalization of mesoporous silica (SBA-15) with ZnO nanoparticles for the effective removal of anionic dyes. The Zn-silica exhibited highly positive surface with a dipole moment of 172 Debye and high charge transfer efficacy with an energy bandgap (ΔE) of 3.35 eV as revealed by quantum chemical DFT simulations. It achieved excellent removal of Alizarin red dye reaching a removal efficiency of 99.99 % and an adsorption capacity of 50 mg/g. In the presence of heavy metal ions commonly present in wastewater (Cd2+, Co2+, Zn2+, Ni2+, Cu2+ and Hg2+), the Zn-silica maintain excellent stability, high selectivity, and reusability within 5 cycles without a significant decline in efficiency. This study thus presents an effective way of wastewater purification on cost-effective adsorbents for meeting the water scarcity demands.
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Affiliation(s)
- Ismail Abdulazeez
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Ali S. Alrajjal
- Aerospace Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Saheed Ganiyu
- Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
- Interdisciplinary Research Center for Refining and Advanced Chemicals, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Nadeem Baig
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Billel Salhi
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Sohaib AbdElazem
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
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3
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Prasad R, Selvaraj K. Effective Distribution of Gold Nanorods in Ordered Thick Mesoporous Silica: A Choice of Noninvasive Theranostics. ACS APPLIED MATERIALS & INTERFACES 2023; 15:47615-47627. [PMID: 37782885 DOI: 10.1021/acsami.3c06108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Porous silica coated gold nanorod core-shell structures demonstrate a multifunctional role in bioimaging, drug delivery, and cancer therapeutics applications. Here, we address a new approach for effective distribution of gold nanorods (GNRs) in a mesoporous silica (MS) shell, viz., one nanorod in one silica particle (GMS). We have studied that silica coating presents major advantages for the better biocompatibility and stability of GNRs. In this study, two different thicknesses of silica shell over GNRs have been discussed as per the application's need; GNRs in thin silica (11 nm) are fit for phototherapy and bioimaging, whereas thick and porous silica (51 nm) coated gold nanorods are suitable for triggered drug delivery and theranostics. However, effective distribution of GNRs in ordered architecture of thick mesoporous silica (MS, more than 50 nm thickness) with high surface area (more than 1000 m2/g) is not well understood so far. Here, we present methodical investigations for uniform and highly ordered mesoporous silica coating over GNRs with tunable thickness (6 to 51 nm). Judicious identification and optimization of different reaction parameters like concentrations of silica precursor (TEOS, 1.85-43.9 mM), template (CTAB, 0.9-5.7 mM), effect of temperature, pH (8.6-10.8), stirring speed (100-400 rpm), and, most importantly, the mode of addition of TEOS with GNRs have been discussed. Studies with thick, porous silica coated GNRs simplify the highest ever reported surface area (1100 m2/g) and cargo capacity (57%) with better product yield (g/batch). First and foremost, we report a highly scalable (more than 500 mL) and rapid direct deposition of an ordered MS shell around GNRs. These engineered core-shell nanoparticles demonstrate X-ray contrast property, synergistic photothermal-chemotherapeutics, and imaging of tumor cell (96% cell death) due to released fluorescent anticancer drug molecules and photothermal effect (52 °C) of embedded GNRs. A deeper insight into their influence on the architectural features and superior theranostics performances has been illustrated in detail. Hence, these findings indicate the potential impact of individual GMS for image guided combination therapeutics of cancer.
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Affiliation(s)
- Rajendra Prasad
- Nano and Computational Materials Lab, Catalysis and Inorganic Chemistry Division, CSIR National Chemical Laboratory, Pune 411008, India
- Interventional Theranostics & Multimode Imaging Lab, School of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi 221005, Uttar Pradesh, India
| | - Kaliaperumal Selvaraj
- Nano and Computational Materials Lab, Catalysis and Inorganic Chemistry Division, CSIR National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), (CSIR-HRDG) Campus, Postal Staff College area, Ghaziabad, Uttar Pradesh 201002, India
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4
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Kotni R, Grau-Carbonell A, Chiappini M, Dijkstra M, van Blaaderen A. Splay-bend nematic phases of bent colloidal silica rods induced by polydispersity. Nat Commun 2022; 13:7264. [DOI: 10.1038/s41467-022-34658-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 11/01/2022] [Indexed: 12/02/2022] Open
Abstract
AbstractLiquid crystal (LC) phases are in between solids and liquids with properties of both. Nematic LCs composed of rod-like molecules or particles exhibit long-range orientational order, yielding characteristic birefringence, but they lack positional order, allowing them to flow like a liquid. This combination of properties as well as their sensitivity to external fields make nematic LCs fundamental for optical applications e.g. liquid crystal displays (LCDs). When rod-like particles become bent, spontaneous bend deformations arise in the LC, leading to geometric frustration which can be resolved by complementary twist or splay deformations forming intriguing twist-bend (NTB) and splay-bend (NSB) nematic phases. Here, we show experimentally that the elusive NSB phases can be stabilized in systems of polydisperse micron-sized bent silica rods. Our results open avenues for the realization of NTB and NSB phases of colloidal and molecular LCs.
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5
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Controlled synthesis of biomimetic materials with protruding structures by in situ growth of silica nanorods via hydroxyl-localized droplet template method. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Luo Z, Li S, Wang L, Liu B. Asymmetrical ring-shaped colloidal particles for self-assembly and superhydrophobic coatings. Chem Commun (Camb) 2022; 58:5757-5760. [PMID: 35446326 DOI: 10.1039/d2cc01853e] [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
A frame-guided wetting strategy is reported to synthesize highly uniform but asymmetrical colloidal particles from rings to oblate ellipsoids through symmetrical discs, which can self-assemble into diversified highly open 2D superstructures. In particular, ring-shaped particle monolayers have a higher contact angle of water than similar spherical ones, suggesting an attractive particle material for self-cleaning superhydrophobic coatings.
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Affiliation(s)
- Zhang Luo
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Shanshan Li
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China. .,University of Chinese Academy of Sciences, Beijing, 100149, China
| | - Linna Wang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China. .,University of Chinese Academy of Sciences, Beijing, 100149, China
| | - Bing Liu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China. .,University of Chinese Academy of Sciences, Beijing, 100149, China
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7
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Hao T, Wang Y, Liu Z, Li J, Shan L, Wang W, Liu J, Tang J. Emerging Applications of Silica Nanoparticles as Multifunctional Modifiers for High Performance Polyester Composites. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2810. [PMID: 34835575 PMCID: PMC8622537 DOI: 10.3390/nano11112810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 10/16/2021] [Accepted: 10/20/2021] [Indexed: 11/17/2022]
Abstract
Nano-modification of polyester has become a research hotspot due to the growing demand for high-performance polyester. As a functional carrier, silica nanoparticles show large potential in improving crystalline properties, enhancing strength of polyester, and fabricating fluorescent polyester. Herein, we briefly traced the latest literature on synthesis of silica modifiers and the resultant polyester nanocomposites and presented a review. Firstly, we investigated synthesis approaches of silica nanoparticles for modifying polyester including sol-gel and reverse microemulsion technology, and their surface modification methods such as grafting silane coupling agent or polymer. Then, we summarized processing technics of silica-polyester nanocomposites, like physical blending, sol-gel processes, and in situ polymerization. Finally, we explored the application of silica nanoparticles in improving crystalline, mechanical, and fluorescent properties of composite materials. We hope the work provides a guideline for the readers working in the fields of silica nanoparticles as well as modifying polyester.
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Affiliation(s)
- Tian Hao
- National Center of International Research for Hybrid Materials Technology, Institute of Hybrid Materials, National Base of International Science & Technology Cooperation, Qingdao University, Qingdao 266071, China; (T.H.); (Z.L.); (J.L.); (L.S.); (W.W.)
| | - Yao Wang
- National Center of International Research for Hybrid Materials Technology, Institute of Hybrid Materials, National Base of International Science & Technology Cooperation, Qingdao University, Qingdao 266071, China; (T.H.); (Z.L.); (J.L.); (L.S.); (W.W.)
- College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Zhipeng Liu
- National Center of International Research for Hybrid Materials Technology, Institute of Hybrid Materials, National Base of International Science & Technology Cooperation, Qingdao University, Qingdao 266071, China; (T.H.); (Z.L.); (J.L.); (L.S.); (W.W.)
| | - Jie Li
- National Center of International Research for Hybrid Materials Technology, Institute of Hybrid Materials, National Base of International Science & Technology Cooperation, Qingdao University, Qingdao 266071, China; (T.H.); (Z.L.); (J.L.); (L.S.); (W.W.)
| | - Liangang Shan
- National Center of International Research for Hybrid Materials Technology, Institute of Hybrid Materials, National Base of International Science & Technology Cooperation, Qingdao University, Qingdao 266071, China; (T.H.); (Z.L.); (J.L.); (L.S.); (W.W.)
- College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Wenchao Wang
- National Center of International Research for Hybrid Materials Technology, Institute of Hybrid Materials, National Base of International Science & Technology Cooperation, Qingdao University, Qingdao 266071, China; (T.H.); (Z.L.); (J.L.); (L.S.); (W.W.)
| | - Jixian Liu
- National Center of International Research for Hybrid Materials Technology, Institute of Hybrid Materials, National Base of International Science & Technology Cooperation, Qingdao University, Qingdao 266071, China; (T.H.); (Z.L.); (J.L.); (L.S.); (W.W.)
| | - Jianguo Tang
- National Center of International Research for Hybrid Materials Technology, Institute of Hybrid Materials, National Base of International Science & Technology Cooperation, Qingdao University, Qingdao 266071, China; (T.H.); (Z.L.); (J.L.); (L.S.); (W.W.)
- College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
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8
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van der Wee EB, Fokkema J, Kennedy CL, Del Pozo M, de Winter DAM, Speets PNA, Gerritsen HC, van Blaaderen A. 3D test sample for the calibration and quality control of stimulated emission depletion (STED) and confocal microscopes. Commun Biol 2021; 4:909. [PMID: 34302049 PMCID: PMC8302645 DOI: 10.1038/s42003-021-02432-3] [Citation(s) in RCA: 3] [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: 11/13/2020] [Accepted: 07/05/2021] [Indexed: 02/07/2023] Open
Abstract
Multiple samples are required to monitor and optimize the quality and reliability of quantitative measurements of stimulated emission depletion (STED) and confocal microscopes. Here, we present a single sample to calibrate these microscopes, align their laser beams and measure their point spread function (PSF) in 3D. The sample is composed of a refractive index matched colloidal crystal of silica beads with fluorescent and gold cores. The microscopes can be calibrated in three dimensions using the periodicity of the crystal; the alignment of the laser beams can be checked using the reflection of the gold cores; and the PSF can be measured at multiple positions and depths using the fluorescent cores. It is demonstrated how this sample can be used to visualize and improve the quality of STED and confocal microscopy images. The sample is adjustable to meet the requirements of different NA objectives and microscopy techniques and additionally can be used to evaluate refractive index mismatches as a function of depth quantitatively.
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Affiliation(s)
- Ernest B van der Wee
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
- Department of Imaging Physics, Delft University of Technology, Delft, the Netherlands
| | - Jantina Fokkema
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
| | - Chris L Kennedy
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
| | - Marc Del Pozo
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
- Stimuli-responsive Functional Materials and Devices, Department of Chemical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - D A Matthijs de Winter
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
- Environmental Hydrogeology, Department of Earth Sciences, Utrecht University, Utrecht, the Netherlands
| | - Peter N A Speets
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
- Department of Imaging Physics, Delft University of Technology, Delft, the Netherlands
| | - Hans C Gerritsen
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
| | - Alfons van Blaaderen
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands.
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9
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Singh B, Na J, Konarova M, Wakihara T, Yamauchi Y, Salomon C, Gawande MB. Functional Mesoporous Silica Nanomaterials for Catalysis and Environmental Applications. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200136] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Baljeet Singh
- CICECO-Aveiro Institute of Materials, University of Aveiro, Department of Chemistry, Aveiro 3810-193, Portugal
| | - Jongbeom Na
- Australian Institute for Bioengineering and Nanotechnology (AIBN) and School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
- JST-ERATO Yamauchi Materials Space-Tectonics Project and International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Muxina Konarova
- Australian Institute for Bioengineering and Nanotechnology (AIBN) and School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Toru Wakihara
- Graduate School of Engineering, The University of Tokyo, 7 Chome-3-1 Hongo, Bunkyo, Tokyo 113-8654, Japan
| | - Yusuke Yamauchi
- Australian Institute for Bioengineering and Nanotechnology (AIBN) and School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
- JST-ERATO Yamauchi Materials Space-Tectonics Project and International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- JST-ERATO Yamauchi Materials Space-Tectonics Project, Kagami Memorial Research Institute for Science and Technology, Waseda University, 2-8-26 Nishi-Waseda, Shinjuku, Tokyo 169-0051, Japan
| | - Carlos Salomon
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, University of Queensland Centre for Clinical Research, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, Queensland, Australia
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, University of Concepción, Concepción, Chile
| | - Manoj B. Gawande
- Regional Centre of Advanced Technologies and Materials, Palacky University, Šlechtitelů 27, Olomouc 783 71, Czech Republic
- Institute of Chemical Technology Mumbai-Marathwada Campus, Jalna, 431203 Maharashtra, India
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10
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Sadighikia S, Grau‐Carbonell A, Welling TA, Kotni R, Hagemans F, Imhof A, van Huis MA, van Blaaderen A. Low‐dose liquid cell electron microscopy investigation of the complex etching mechanism of rod‐shaped silica colloids. NANO SELECT 2020. [DOI: 10.1002/nano.202000060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Sina Sadighikia
- Soft Condensed Matter Debye Institute for Nanomaterials Science Utrecht University Princetonplein 5 Utrecht 3584CC The Netherlands
| | - Albert Grau‐Carbonell
- Soft Condensed Matter Debye Institute for Nanomaterials Science Utrecht University Princetonplein 5 Utrecht 3584CC The Netherlands
| | - Tom A.J. Welling
- Soft Condensed Matter Debye Institute for Nanomaterials Science Utrecht University Princetonplein 5 Utrecht 3584CC The Netherlands
| | - Ramakrishna Kotni
- Soft Condensed Matter Debye Institute for Nanomaterials Science Utrecht University Princetonplein 5 Utrecht 3584CC The Netherlands
| | - Fabian Hagemans
- Soft Condensed Matter Debye Institute for Nanomaterials Science Utrecht University Princetonplein 5 Utrecht 3584CC The Netherlands
| | - Arnout Imhof
- Soft Condensed Matter Debye Institute for Nanomaterials Science Utrecht University Princetonplein 5 Utrecht 3584CC The Netherlands
| | - Marijn A. van Huis
- Soft Condensed Matter Debye Institute for Nanomaterials Science Utrecht University Princetonplein 5 Utrecht 3584CC The Netherlands
| | - Alfons van Blaaderen
- Soft Condensed Matter Debye Institute for Nanomaterials Science Utrecht University Princetonplein 5 Utrecht 3584CC The Netherlands
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11
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Anzivino C, van Roij R, Dijkstra M. A Landau-de Gennes theory for twist-bend and splay-bend nematic phases of colloidal suspensions of bent rods. J Chem Phys 2020; 152:224502. [PMID: 32534541 DOI: 10.1063/5.0008936] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
We develop a phenomenological Landau-de Gennes (LdG) theory for lyotropic colloidal suspensions of bent rods using a Q-tensor expansion of the chemical-potential dependent grand potential. In addition, we introduce a bend flexoelectric term, coupling the polarization and the divergence of the Q-tensor, to study the stability of uniaxial (N), twist-bend (NTB), and splay-bend (NSB) nematic phases of colloidal bent rods. We first show that a mapping can be found between the LdG theory and the Oseen-Frank theory. By breaking the degeneracy between the splay and bend elastic constants, we find that the LdG theory predicts either an N-NTB-NSB or an N-NSB-NTB phase sequence upon increasing the particle concentration. Finally, we employ our theory to study the first-order N-NTB phase transition, for which we find that K33 as well as its renormalized version K33 eff remain positive at the transition, whereas K33 eff vanishes at the nematic spinodal. We connect these findings to recent simulation results.
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Affiliation(s)
- Carmine Anzivino
- Soft Condensed Matter, Debye Institute for Nanomaterial Science, Utrecht University, Princetonplein 1, Utrecht 3584 CC, The Netherlands
| | - René van Roij
- Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, Utrecht 3584 CC, The Netherlands
| | - Marjolein Dijkstra
- Soft Condensed Matter, Debye Institute for Nanomaterial Science, Utrecht University, Princetonplein 1, Utrecht 3584 CC, The Netherlands
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12
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Hu W, Liu C, Wang J, Pei C, Zhang Y, Zhang C, Liu Y, Shan Y, Yu C. Synthesis of cube–rod–tube triblock asymmetric nanostructures for enhanced heterogeneous catalysis. Chem Commun (Camb) 2020; 56:7973-7976. [DOI: 10.1039/d0cc03198d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A triblock asymmetric nanostructure is fabricated via a sequential growth process, which can be used as an active nano stir bar with accelerated catalytic performance.
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Affiliation(s)
- Wenli Hu
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Chao Liu
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Jing Wang
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Congcong Pei
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Ye Zhang
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Chaoqi Zhang
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Yang Liu
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Yongkui Shan
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Chengzhong Yu
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
- Australian Institute for Bioengineering and Nanotechnology
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13
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Hayden DR, Kennedy CL, Velikov KP, van Blaaderen A, Imhof A. Seeded-Growth of Silica Rods from Silica-Coated Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14913-14919. [PMID: 31652069 PMCID: PMC6868708 DOI: 10.1021/acs.langmuir.9b02847] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/24/2019] [Indexed: 06/10/2023]
Abstract
Seeded growth of silica rods from colloidal particles has emerged as a facile method to develop novel complex particle structures with hybrid compositions and asymmetrical shapes. However, this seeded-growth technique has been so far limited to colloidal particles of only a few materials. Here, we first develop a general synthesis for the seeded-growth of silica rods from silica particles. We then demonstrate the growth of silica rods from silica-coated particles with three different cores which highlight the generality of this synthesis: fluorescently labeled organo-silica (fluorescein), metallic (Ag), and organic (PS latex). We also demonstrate the assembly of these particles into supraparticles. This general synthesis method can be extended to the growth of silica rods from any colloidal particle which can be coated with silica.
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Affiliation(s)
- Douglas R. Hayden
- Soft
Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Chris L. Kennedy
- Soft
Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Krassimir P. Velikov
- Soft
Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
- Unilever
R&D Vlaardingen, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands
- Institute
of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Alfons van Blaaderen
- Soft
Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Arnout Imhof
- Soft
Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
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Pujala RK, Bohidar HB. Slow dynamics and equilibrium gelation in fractionated montmorillonite nanoplatelet dispersions. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04507-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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