1
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Bharadwaj M, Gaur A. Photoluminescence Confocal Mapping of a Novel Nd 3+/Yb 3+: Zn 2SiO 4 Composite thin film on Si (100) Substrate Utilizing a 980 nm Pumping Source. J Fluoresc 2024:10.1007/s10895-024-03850-2. [PMID: 39172326 DOI: 10.1007/s10895-024-03850-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Accepted: 07/15/2024] [Indexed: 08/23/2024]
Abstract
A fixed Nd3+ and varied Yb3+ ion concentration were incorporated in a Zinc-Silicate (SZNYX) composite solution using ex-situ sol-gel solution to fabricate a novel thin film (TF) on Si (100)-substrate. The upconversion luminescence (UCL) spectra of the thin films were measured under 980 nm laser excitation, with the most optimized result for Yb3+ ion concentration of 1.5 mol%. Additionally, a 2-D photoluminescence (PL) confocal mapping of the SZNY15-TF material confirmed uniform PL distribution throughout the space under the same excitation wavelength. Structural characterization via XRD revealed the tetragonal Zn2SiO4 nano-crystalline nature of the film at three distinct annealing temperatures. Morphological characterization using the Field-emission scanning electron Microscope (FESEM) coupled with energy dispersion spectrometer (EDS) affirmed the nanoflower structure and the purity of doping purity in the samples, respectively. These findings collectively confirm the promising UCL properties of the SZNYX-TF samples, suggesting potential applications in photonic.
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Affiliation(s)
| | - Ankita Gaur
- School of Energy Sciences and Engineering, IIT Guwahati, Assam, 781039, India.
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2
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Dhaffouli A, Holzinger M, Carinelli S, Barhoumi H, Salazar-Carballo PA. ZnO Doped Silica Nanoparticles (ZnO@SiO 2) for Enhanced Electrochemical Detection of Cd 2+ Ions in Real Samples. SENSORS (BASEL, SWITZERLAND) 2024; 24:4179. [PMID: 39000958 PMCID: PMC11244355 DOI: 10.3390/s24134179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/21/2024] [Accepted: 06/24/2024] [Indexed: 07/16/2024]
Abstract
Pollution by heavy metal ions has a serious impact on human health and the environment, which is why the monitoring of heavy metal ions is of great practical importance. In this work, we describe the development of an electrochemical sensor for the detection of cadmium (Cd2+) involving the doping of porous SiO2 spheres with ZnO nanoparticles. Zinc oxide is chosen as the central dopant in the composite material to increase the conductivity and thus improve the electrochemical detection of Cd2+ ions with the SiO2 spheres. The resulting composite is characterized by electrochemical spectroscopic XRD and microscopic methods. As a result, the developed sensor shows good selectivity towards the targeted Cd2+ ions compared to other divalent ions. After optimization of the experimental conditions, the electrochemical sensor shows two different linear ranges between 2.5 × 10-11 molL-1 to 1.75 × 10-10 molL-1 and 2 × 10-9 molL-1 to 1.75 × 10-9 molL-1, indicating a change from diffusion-controlled to surface-controlled oxidation of Cd2+. A detection limit was reached at 4.4 × 10-11 molL-1. In addition, it offers good repeatability and recovery, and can detect accurate trace amounts of Cd2+ ions in real samples such as tap water or seawater by spiking these samples with known Cd2+ concentrations. This setup also provides satisfactory recovery rates in the range of 89-102%.
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Affiliation(s)
- Afef Dhaffouli
- Laboratory of Interfaces and Advanced Materials, Faculty of Sciences of Monastir, University of Monastir, Monastir 5000, Tunisia
- Department of Chemistry, Faculty of Sciences of Gafsa, University of Gafsa, Gafsa 2100, Tunisia
| | - Michael Holzinger
- Department of Molecular Chemistry UMR CNRS 5250, Grenoble-Alpes University, CEDEX 9, 38058 Grenoble, France
| | - Soledad Carinelli
- Laboratory of Sensors, Biosensors and Advanced Materials, Faculty of Health Sciences, University of La Laguna, Campus de Ofra s/n, 38071 La Laguna, Spain
| | - Houcine Barhoumi
- Laboratory of Interfaces and Advanced Materials, Faculty of Sciences of Monastir, University of Monastir, Monastir 5000, Tunisia
| | - Pedro A Salazar-Carballo
- Laboratory of Sensors, Biosensors and Advanced Materials, Faculty of Health Sciences, University of La Laguna, Campus de Ofra s/n, 38071 La Laguna, Spain
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3
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Qomariyah L, Hirano T, Putra NR, Suprapto S, Ajiz HA, Fauziyah M. Innovative surfactant-free synthesis of core-shell SiO 2/ZnO particles: rapid ultrasonication and photocatalytic inhibition. RSC Adv 2024; 14:12665-12675. [PMID: 38645520 PMCID: PMC11027039 DOI: 10.1039/d4ra01309c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 04/05/2024] [Indexed: 04/23/2024] Open
Abstract
This study demonstrates the preparation of SiO2/ZnO core-shell nanoparticles with controllable shell size and their optical properties. A facile ultrasonication method was utilized to prepare the core-shell particles in the absence of surfactant materials. The synthesis duration was 75% shorter than that required for the common sol-gel method, which favours its potential applicability in the future for mass production. Tetraethyl orthosilicate (TEOS) was used as the silica source, while the core material was prepared using zinc acetate dihydrate. The outer shell size could easily be controlled by changing the molar ratio of silica from 0.25 to 1.00. The experimental results show that increasing the silica ratio was effective in suppressing the self-agglomeration of ZnO and, further, in obtaining agglomeration-free particles. The investigation of the photoluminescence (PL) properties of nanometre-sized ZnO revealed several emission peaks in the ultraviolet (UV) wavelength range, indicating variations in bandgap energy. This did not appear in the spectrum of micrometre-sized ZnO particles. The core-shell particles produced with higher amounts of silica showed higher UV-A and UV-B absorption. In addition, the presence of silica reduced the photocatalytic activity of ZnO by 65% and reduced the PL intensity. The obtained emission peaks, intensity changes, and spectral characteristics open new avenues for further research on tailoring the properties of SiO2/ZnO core-shell structures for specific technological advancements. These advancements hold promising applications in UV attenuation materials, LED technologies, lenses, and solar cells within the realm of optical devices.
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Affiliation(s)
- Lailatul Qomariyah
- Department of Industrial Chemical Engineering, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
| | - Tomoyuki Hirano
- Chemical Engineering Program, Graduate School of Advanced Science and Engineering, Hiroshima University 1-4-1 Kagamiyama Higashihiroshima Hiroshima 739-8527 Japan
| | - Nicky Rahmana Putra
- Research Center for Pharmaceutical Ingredients and Traditional Medicine, National Research and Innovation Agency (BRIN), Complex Cibinong Science Center-BRIN Cibinong 16911 Jawa Barat Indonesia
| | - Suprapto Suprapto
- Department of Industrial Chemical Engineering, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
| | - Hendrix Abdul Ajiz
- Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia
| | - Mar'atul Fauziyah
- Department of Chemical Engineering, Faculty of Engineering, Universitas Brawijaya Malang 65145 Indonesia
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Smirnov O, Dzhagan V, Kovalenko M, Gudymenko O, Dzhagan V, Mazur N, Isaieva O, Maksimenko Z, Kondratenko S, Skoryk M, Yukhymchuk V. ZnO and Ag NP-decorated ZnO nanoflowers: green synthesis using Ganoderma lucidum aqueous extract and characterization. RSC Adv 2022; 13:756-763. [PMID: 36683769 PMCID: PMC9809204 DOI: 10.1039/d2ra05834k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/14/2022] [Indexed: 01/05/2023] Open
Abstract
Fungi produce and excrete various proteins, enzymes, polysaccharides, and secondary metabolites, which may be used as media for the "green" synthesis of metal and semiconductor nanoparticles (NPs). ZnO NPs with a flower-like morphology were synthesized by an affordable colloidal route, using an aqueous extract of Ganoderma lucidum as a reducing agent and stabilizer. Each individual "flower" has a large effective surface, which is preserved when the particles are close packed into a dense film, which is advantageous for numerous applications. The phonon Raman spectrum and X-ray diffraction (XRD) pattern prove the high crystallinity of the NPs, with the distinct pattern of a hexagonal (wurtzite) lattice, negligible residual stress, and a crystallite size of 12-14 nm determined from the XRD. The photoluminescence (PL) spectrum of the as-synthesized ZnO NPs contains a structured defect-related feature in the violet-blue range, while the green PL, common for nanostructures synthesized by "green" routes, is very weak. By applying dimethylsulfoxide as an additional passivating agent, the excitonic (UV) PL band was activated without enhancement of the defect-related features. Ag NP-decorated ZnO flowers were synthesized by subsequent silver reduction by pepper extract. The ZnO/Ag NPs exhibited efficient surface-enhanced Raman scattering (SERS) of a standard dye analyte, rhodamine 6G, ensuring the feasibility of other applications that require close contact of ZnO/Ag to other nanostructures or molecules to realize the energy of the charge transfer.
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Affiliation(s)
- Oleksandr Smirnov
- ESC "Institute of Biology and Medicine", Taras Shevchenko National University of Kyiv Kyiv Ukraine
- Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine Kyiv Ukraine
| | - Volodymyr Dzhagan
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine Kyiv Ukraine
- Physics Department, Taras Shevchenko National University of Kyiv Kyiv Ukraine
| | - Mariia Kovalenko
- ESC "Institute of Biology and Medicine", Taras Shevchenko National University of Kyiv Kyiv Ukraine
| | - Oleksandr Gudymenko
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine Kyiv Ukraine
| | - Veronika Dzhagan
- ESC "Institute of Biology and Medicine", Taras Shevchenko National University of Kyiv Kyiv Ukraine
| | - Nazar Mazur
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine Kyiv Ukraine
| | - Oksana Isaieva
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine Kyiv Ukraine
| | - Zoia Maksimenko
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine Kyiv Ukraine
| | - Serhiy Kondratenko
- Physics Department, Taras Shevchenko National University of Kyiv Kyiv Ukraine
| | - Mykola Skoryk
- Physics Department, Taras Shevchenko National University of Kyiv Kyiv Ukraine
- G.V. Kurdyumov Institute for Metal Physics, National Academy of Sciences of Ukraine Kyiv Ukraine
| | - Volodymyr Yukhymchuk
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine Kyiv Ukraine
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Xing X, Zhao Y, Xu C, He Y, Yang C, Xiao K, Zheng J, Deng B. Omniphobic Polyvinylidene Fluoride Membrane Decorated with a ZnO Nano Sea Urchin Structure: Performance Against Surfactant-Wetting in Membrane Distillation. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xing Xing
- College of Resources and Environment, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, China
| | - Yurong Zhao
- College of Resources and Environment, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, China
| | - Congbin Xu
- College of Resources and Environment, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, China
| | - Yali He
- College of Resources and Environment, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, China
| | - Chen Yang
- College of Resources and Environment, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, China
| | - Kang Xiao
- College of Resources and Environment, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, China
| | - Jianzhong Zheng
- College of Resources and Environment, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, China
| | - Baolin Deng
- Department of Civil and Environmental Engineering, University of Missouri, Columbia, Missouri 65211, United States
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6
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Stroyuk O, Raievska O, Zahn DRT. Single-layer carbon nitride: synthesis, structure, photophysical/photochemical properties, and applications. Phys Chem Chem Phys 2021; 23:20745-20764. [PMID: 34542127 DOI: 10.1039/d1cp03457j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This Perspective provides a critical summary of the current state of the art in the synthesis and properties of polyheptazine single-layer carbon nitride (SLCN). The summary combines the authors' research and literature reports on SLCN concerning the synthesis of single-layer polyheptazine sheets, light absorption and emission by SLCN, photochemical and photocatalytic properties of SLCN as well as examples of applications of SLCN sheets as "building blocks" in heterostructures with nanocrystalline semiconductors and metals. The Perspective is concluded with an outlook discussing the most promising directions for further studies and applications of SLCN and related composites.
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Affiliation(s)
- Oleksandr Stroyuk
- Forschungszentrum Jülich GmbH, Helmholtz-Institut Erlangen Nürnberg für Erneuerbare Energien (HI ERN), Immerwahrstr. 2, 91058 Erlangen, Germany.
| | - Oleksandra Raievska
- Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany. .,Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, D-09107 Chemnitz, Germany
| | - Dietrich R T Zahn
- Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany. .,Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, D-09107 Chemnitz, Germany
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7
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Garcia IM, Balhaddad AA, Ibrahim MS, Weir MD, Xu HH, Collares FM, Melo MAS. Antibacterial response of oral microcosm biofilm to nano-zinc oxide in adhesive resin. Dent Mater 2021; 37:e182-e193. [DOI: 10.1016/j.dental.2020.11.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 11/26/2020] [Indexed: 01/30/2023]
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8
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Wang K, Peng X, Gao X, Araki Y, Zhao H, Liang J, Xiao L, Chen J, Liu G, Wu J, Yang G, Tsubaki N. Insights into the synergistic effect of active centers over ZnMg/SBA-15 catalysts in direct synthesis of butadiene from ethanol. REACT CHEM ENG 2021. [DOI: 10.1039/d0re00449a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functionalized catalysts with multiple active centers have been studied for direct conversion of ethanol to butadiene (ETB).
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9
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Dzhagan V, Stroyuk O, Raievska O, Isaieva O, Kapush O, Selyshchev O, Yukhymchuk V, Valakh M, Zahn DRT. Photoinduced Enhancement of Photoluminescence of Colloidal II-VI Nanocrystals in Polymer Matrices. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2565. [PMID: 33371226 PMCID: PMC7766198 DOI: 10.3390/nano10122565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/11/2020] [Accepted: 12/19/2020] [Indexed: 01/03/2023]
Abstract
The environment strongly affects both the fundamental physical properties of semiconductor nanocrystals (NCs) and their functionality. Embedding NCs in polymer matrices is an efficient way to create a desirable NC environment needed for tailoring the NC properties and protecting NCs from adverse environmental factors. Luminescent NCs in optically transparent polymers have been investigated due to their perspective applications in photonics and bio-imaging. Here, we report on the manifestations of photo-induced enhancement of photoluminescence (PL) of aqueous colloidal NCs embedded in water-soluble polymers. Based on the comparison of results obtained on bare and core/shell NCs, NCs of different compounds (CdSe, CdTe, ZnO) as well as different embedding polymers, we conclude on the most probable mechanism of the photoenhancement for these sorts of systems. Contrary to photoenhancement observed earlier as a result of surface photocorrosion, we do not observe any change in peak position and width of the excitonic PL. Therefore, we suggest that the saturation of trap states by accumulated photo-excited charges plays a key role in the observed enhancement of the radiative recombination. This suggestion is supported by the unique temperature dependence of the trap PL band as well as by power-dependent PL measurement.
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Affiliation(s)
- Volodymyr Dzhagan
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 01601 Kyiv, Ukraine; (O.I.); (O.K.); (V.Y.); (M.V.)
- Department of Physics, Taras Shevchenko National University of Kyiv, 64 Volodymyrs’ka St., 01601 Kyiv, Ukraine
| | - Oleksandr Stroyuk
- Forschungszentrum Julich GmbH, Helmholtz-Institut Erlangen Nürnberg für Erneuerbare Energien (HI ERN), Immerwahrstr. 2, 91058 Erlangen, Germany;
| | - Oleksandra Raievska
- Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany; (O.R.); (O.S.); (D.R.T.Z.)
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, 09107 Chemnitz, Germany
- L.V. Pysarzhevsky Institute of Physical Chemistry, National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
| | - Oksana Isaieva
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 01601 Kyiv, Ukraine; (O.I.); (O.K.); (V.Y.); (M.V.)
| | - Olga Kapush
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 01601 Kyiv, Ukraine; (O.I.); (O.K.); (V.Y.); (M.V.)
| | - Oleksandr Selyshchev
- Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany; (O.R.); (O.S.); (D.R.T.Z.)
| | - Volodymyr Yukhymchuk
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 01601 Kyiv, Ukraine; (O.I.); (O.K.); (V.Y.); (M.V.)
| | - Mykhailo Valakh
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 01601 Kyiv, Ukraine; (O.I.); (O.K.); (V.Y.); (M.V.)
| | - Dietrich R. T. Zahn
- Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany; (O.R.); (O.S.); (D.R.T.Z.)
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, 09107 Chemnitz, Germany
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Prasanna APS, Venkataprasanna KS, Pannerselvam B, Asokan V, Jeniffer RS, Venkatasubbu GD. Multifunctional ZnO/SiO 2 Core/Shell Nanoparticles for Bioimaging and Drug Delivery Application. J Fluoresc 2020; 30:1075-1083. [PMID: 32621092 DOI: 10.1007/s10895-020-02578-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 06/23/2020] [Indexed: 11/29/2022]
Abstract
Semiconducting nanoparticles with luminescent properties are used as detection probes and drug carriers in in-vitro and in-vivo analysis. ZnO nanoparticles, due to its biocompatibility and low cost, have shown potential application in bioimaging and drug delivery. Thus, ZnO/SiO2 core/shell nanoparticle was synthesised by wet chemical method for fluorescent probing and drug delivery application. The synthesised core/shell nanomaterial was characterized using XRD, FTIR, UV-VIS spectroscopy, Raman spectroscopy, TEM and PL analysis. The silicon shell enhances the photoluminescence and aqueous stability of the pure ZnO nanoparticles. The porous surface of the shell acts as a carrier for sustained release of curcumin. The synthesized core/shell particle shows high cell viability, hemocompatibility and promising florescent property. Graphical Abstract.
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Affiliation(s)
- A P S Prasanna
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Chengalpattu District, Tamil Nadu, 603 203, India
| | - K S Venkataprasanna
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Chengalpattu District, Tamil Nadu, 603 203, India
| | | | - Vijayshankar Asokan
- Department of Chemistry and Chemical Engineering, Chalmers University, Gothenburg, Sweden
| | - R Sofia Jeniffer
- Center of Nanotechnology Research (CNR), VIT University, Vellore, Tamilnadu, India
| | - G Devanand Venkatasubbu
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Chengalpattu District, Tamil Nadu, 603 203, India.
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11
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Quantum-Sized Zinc Oxide Nanoparticles Synthesised within Mesoporous Silica (SBA-11) by Humid Thermal Decomposition of Zinc Acetate. CRYSTALS 2020. [DOI: 10.3390/cryst10060549] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A modified facile method is presented to synthesise quantum-sized zinc oxide nanoparticles within the pores of a mesoporous silica host (SBA-11). This method eliminates the 3 h alcohol reflux and the basic solution reaction steps of zinc acetate. The mesoporous structure and the ZnO nanoparticles were analysed by X-ray diffractometry, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, nitrogen sorption analysis and UV–VIS spectroscopy. These tests confirm the synthesis of ~1 nm sized ZnO within the pores of SBA-11 and that the porous structure remained intact after ZnO synthesis.
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12
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Abd El-Hady MM, Sharaf S, Farouk A. Highly hydrophobic and UV protective properties of cotton fabric using layer by layer self-assembly technique. CELLULOSE 2020; 27:1099-1110. [DOI: 10.1007/s10570-019-02815-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 10/26/2019] [Indexed: 09/02/2023]
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13
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Procházková L, Vaněček V, Čuba V, Pjatkan R, Martinez-Turtos R, Jakubec I, Buryi M, Omelkov S, Auffray E, Lecoq P, Mihóková E, Nikl M. Core-shell ZnO:Ga-SiO 2 nanocrystals: limiting particle agglomeration and increasing luminescence via surface defect passivation. RSC Adv 2019; 9:28946-28952. [PMID: 35528437 PMCID: PMC9071835 DOI: 10.1039/c9ra04421c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 09/06/2019] [Indexed: 12/02/2022] Open
Abstract
Heat treatment is needed to increase the luminescence intensity of ZnO:Ga particles, but it comes at the cost of higher particle agglomeration. Higher agglomeration results in low transparency of scintillating powder when embedded in a matrix and constitutes one of the biggest disadvantages, besides low light yield and low stopping power, of ZnO:Ga powder. Limiting ZnO:Ga particle size is therefore a key step in order to prepare highly luminescent and transparent composites with prospects for optical applications. In this work, SiO2 coating was successfully used to improve luminescence intensity or limitation of crystallite size growth during further annealing. Furthermore, ZnO:Ga and ZnO:Ga-SiO2 core-shells were embedded in a polystyrene matrix.
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Affiliation(s)
- Lenka Procházková
- Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering Břehová 7 115 19 Czech Republic
- Institute of Physics of the AS CR v.v.i, Cukrovarnická 10 Prague 6 Czech Republic
| | - Vojtěch Vaněček
- Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering Břehová 7 115 19 Czech Republic
| | - Václav Čuba
- Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering Břehová 7 115 19 Czech Republic
| | - Radek Pjatkan
- NUVIA a.s. Trojanova street 117 278 01 Kralupy nad Vltavou Czech Reublic
| | | | - Ivo Jakubec
- Institute of Inorganic Chemistry of the Czech Academy of Sciences Řež 250 68 Husinec-Řež 1001 Czech Republic
| | - Maksym Buryi
- Institute of Physics of the AS CR v.v.i, Cukrovarnická 10 Prague 6 Czech Republic
| | - Sergey Omelkov
- Institute of Physics, University of Tartu W. Ostwaldi 1 50411 Tartu Estonia
| | | | | | - Eva Mihóková
- Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering Břehová 7 115 19 Czech Republic
- Institute of Physics of the AS CR v.v.i, Cukrovarnická 10 Prague 6 Czech Republic
| | - Martin Nikl
- Institute of Physics of the AS CR v.v.i, Cukrovarnická 10 Prague 6 Czech Republic
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14
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Engku Ali EAG, Matori KA, Saion E, Aziz SHA, Zaid MHM, Alibe IM. Effect of sintering temperatures on structural and optical properties of ZnO-Zn2SiO4 composite prepared by using amorphous SiO2 nanoparticles. JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY 2019; 55:115-122. [DOI: 10.1007/s41779-018-0217-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 05/19/2018] [Accepted: 06/05/2018] [Indexed: 09/02/2023]
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15
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Mansur AAP, Mansur HS, Carvalho SM, Caires AJ. One-Pot Aqueous Synthesis of Fluorescent Ag-In-Zn-S Quantum Dot/Polymer Bioconjugates for Multiplex Optical Bioimaging of Glioblastoma Cells. CONTRAST MEDIA & MOLECULAR IMAGING 2017; 2017:3896107. [PMID: 29259535 PMCID: PMC5702976 DOI: 10.1155/2017/3896107] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 09/04/2017] [Accepted: 09/13/2017] [Indexed: 11/17/2022]
Abstract
Cancer research has experienced astonishing advances recently, but cancer remains a major threat because it is one of the leading causes of death worldwide. Glioblastoma (GBM) is the most malignant brain tumor, where the early diagnosis is vital for longer survival. Thus, this study reports the synthesis of novel water-dispersible ternary AgInS2 (AIS) and quaternary AgInS2-ZnS (ZAIS) fluorescent quantum dots using carboxymethylcellulose (CMC) as ligand for multiplexed bioimaging of malignant glioma cells (U-87 MG). Firstly, AgInS2 core was prepared using a one-pot aqueous synthesis stabilized by CMC at room temperature and physiological pH. Then, an outer layer of ZnS was grown and thermally annealed to improve their optical properties and split the emission range, leading to core-shell alloyed nanostructures. Their physicochemical and optical properties were characterized, demonstrating that luminescent monodispersed AIS and ZAIS QDs were produced with average sizes of 2.2 nm and 4.3 nm, respectively. Moreover, the results evidenced that they were cytocompatible using in vitro cell viability assays towards human embryonic kidney cell line (HEK 293T) and U-87 MG cells. These AIS and ZAIS successfully behaved as fluorescent nanoprobes (red and green, resp.) allowing multiplexed bioimaging and biolabeling of costained glioma cells using confocal microscopy.
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Affiliation(s)
- Alexandra A. P. Mansur
- Center of Nanoscience, Nanotechnology and Innovation (CeNanoI), Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Herman S. Mansur
- Center of Nanoscience, Nanotechnology and Innovation (CeNanoI), Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Sandhra M. Carvalho
- Center of Nanoscience, Nanotechnology and Innovation (CeNanoI), Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
- Department of Preventive Veterinary Medicine, Veterinary School, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
- Department of Physiology and Biophysics, ICB, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
| | - Anderson J. Caires
- Center of Nanoscience, Nanotechnology and Innovation (CeNanoI), Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, Brazil
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Galedari NA, Rahmani M, Tasbihi M. Preparation, characterization, and application of ZnO@SiO 2 core-shell structured catalyst for photocatalytic degradation of phenol. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:12655-12663. [PMID: 27778271 DOI: 10.1007/s11356-016-7888-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 10/10/2016] [Indexed: 06/06/2023]
Abstract
In the current study, ZnO@SiO2 core-shell structured catalyst was synthesized for photocatalytic degradation of phenol from aqueous samples. The synthesized catalyst was characterized by Fourier transform infrared spectra, X-ray diffraction, energy-dispersive X-ray spectroscopy, UV-Vis-NIR diffuse reflectance spectroscopy, transmission electron microscopy, BET surface area, zeta potential, and field emission scanning electron microscopy. The effect of catalyst loading, initial phenol concentration, pH, UV light intensity and weight ratio of ZnO/(SiO2 + ZnO) were studied towards photocatalytic degradation of phenol. Moreover, photocatalytic activities of bare ZnO and ZnO@SiO2 were compared. The results advocated that ZnO@SiO2 catalyst showed high photocatalytic performance for degradation of phenol (96 % after 120 min) at an initial pH of 5.9, catalyst loading of 0.5 g/L and initial phenol concentration of 25 mg/L. Increase in the weight ratio of ZnO/(SiO2 + ZnO) from 0.2 to 0.33 significantly enhanced the photodegradation of phenol from 84 to 94 %. It was also found that photocatalytic activity of ZnO@SiO2 was higher than bare ZnO nanoparticles. Graphical abstract ᅟ.
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Affiliation(s)
- Naghmeh Abuali Galedari
- Department of Chemical Engineering, Amirkabir University of Technology, Mahshahr Campus, Mahshahr, Iran
| | - Mohammad Rahmani
- Department of Chemical Engineering, Amirkabir University of Technology, Mahshahr Campus, Mahshahr, Iran.
- Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran.
| | - Minoo Tasbihi
- Laboratory for Environmental Research, University of Nova Gorica, Nova Gorica, Slovenia
- Technical University Berlin, Straße des 17.Juni 124, 10623, Berlin, Germany
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17
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The effects of silica based nanoparticles on the photophysicochemical properties, in vitro dark viability and photodynamic therapy study of zinc monocarboxyphenoxy phthalocyanine. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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18
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Burešová H, Procházková L, Turtos RM, Jarý V, Mihóková E, Beitlerová A, Pjatkan R, Gundacker S, Auffray E, Lecoq P, Nikl M, Čuba V. Preparation and luminescence properties of ZnO:Ga - polystyrene composite scintillator. OPTICS EXPRESS 2016; 24:15289-15298. [PMID: 27410805 DOI: 10.1364/oe.24.015289] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Highly luminescent ZnO:Ga-polystyrene composite (ZnO:Ga-PS) with ultrafast subnanosecond decay was prepared by homogeneous embedding the ZnO:Ga scintillating powder into the scintillating organic matrix. The powder was prepared by photo-induced precipitation with subsequent calcination in air and Ar/H2 atmospheres. The composite was subsequently prepared by mixing the ZnO:Ga powder into the polystyrene (10 wt% fraction of ZnO:Ga) and press compacted to the 1 mm thick pellet. Luminescent spectral and kinetic characteristics of ZnO:Ga were preserved. Radioluminescence spectra corresponded purely to the ZnO:Ga scintillating phase and emission of polystyrene at 300-350 nm was absent. These features suggest the presence of non-radiative energy transfer from polystyrene host towards the ZnO:Ga scintillating phase which is confirmed by the measurement of X-ray excited scintillation decay with picosecond time resolution. It shows an ultrafast rise time below the time resolution of the experiment (18 ps) and a single-exponential decay with the decay time around 500 ps.
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19
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Wang FR, Su YY, Liu JK, Wu Y. Enhanced photoelectric properties by the coordinating role of doping and modification. Phys Chem Chem Phys 2016; 18:4850-9. [PMID: 26804789 DOI: 10.1039/c5cp07159c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Dual technique design in this research has successfully enriched the complementation between doping and surface modification. Here, Co(2+) doped Ag-ZnO nanocomposites (CAZ NCs) are mass produced by the combustion method. The HRTEM image shows that the doped Co(2+) and the surface modified Ag nanoparticles on the ZnO NCs are influential on the preferential orientation. Based on the conductivity formula σ = nqμ and the actual verification, the improved photoelectric properties of CAZ NCs under visible light irradiation are attributed to the enhanced light absorption and the weakened recombination of photogenerated electron-hole pairs. It would be instructive for the sound design concept of subsequent material development.
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Affiliation(s)
- Feng-Rui Wang
- Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237, P. R. China.
| | - Yu-Yun Su
- Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237, P. R. China.
| | - Jin-Ku Liu
- Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237, P. R. China.
| | - Ying Wu
- Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, 321004, P. R. China
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Raevskaya AE, Panasiuk YV, Stroyuk OL, Kuchmy SY, Milekhin AG, Sveshnikova LL, Duda TA, Yeryukov NA, Rodyakina EE. Effect of Post-Synthesis Heat Treatment of ZnO Nanoparticles in DMF on Their Size and Spectral and Luminescent Properties. THEOR EXP CHEM+ 2016. [DOI: 10.1007/s11237-016-9436-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Muravitskaya A, Rumyantseva A, Kostcheev S, Dzhagan V, Stroyuk O, Adam PM. Enhanced Raman scattering of ZnO nanocrystals in the vicinity of gold and silver nanostructured surfaces. OPTICS EXPRESS 2016; 24:A168-A173. [PMID: 26832570 DOI: 10.1364/oe.24.00a168] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
nonresonant surface enhanced Raman scattering by optical phonons of ZnO nanocrystals on and beneath silver and gold island films is reported. For both configurations comparable SERS efficiency is observed, proving their potential utility. Variations in peak intensities can be attributed to difference in the morphology of island films on and beneath nanocrystals as well as to variation of the interface between semiconductor and metal. The dominant peaks in the SERS spectra are assigned to surface optical phonon modes.
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22
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Cao R, Zhu L, Liu H, Yang W, Li W. The effect of silica sols on electrodeposited zinc coatings for sintered NdFeB. RSC Adv 2015. [DOI: 10.1039/c5ra19517a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We developed an in situ method to prepare silica particle-containing zinc coatings on NdFeB.
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Affiliation(s)
- Rui Cao
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education)
- School of Materials Science and Engineering
- Beihang University
- Beijing 100191
- China
| | - Liqun Zhu
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education)
- School of Materials Science and Engineering
- Beihang University
- Beijing 100191
- China
| | - Huicong Liu
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education)
- School of Materials Science and Engineering
- Beihang University
- Beijing 100191
- China
| | - Wei Yang
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education)
- School of Materials Science and Engineering
- Beihang University
- Beijing 100191
- China
| | - Weiping Li
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education)
- School of Materials Science and Engineering
- Beihang University
- Beijing 100191
- China
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