1
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Zhang X, Xie W, Du S, Wang H, Zhang Z. Synthesis of Rod-Shaped ZnO/Polysiloxane Micromotors with Patch-Dependent Motion Modes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4389-4395. [PMID: 35348333 DOI: 10.1021/acs.langmuir.2c00123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Inorganic particles with photocatalytic properties are excellent candidates for the fabrication of micromotors. To achieve self-propulsion, the geometric and chemical symmetries of inorganic particles should be broken. However, the synthesis of micromotors with different geometric and chemical symmetries remains challenging. In this paper, a simple synthesis method is proposed to prepare rod-shaped micromotors with different patches, leading to distinct geometric and chemical symmetries. The micromotors are composed of zinc oxide (ZnO) microrods partially patched with polysiloxanes at different positions. The patches of the micromotors can be roughly regulated by varying the amount of siloxanes used in the synthesis. These micromotors are propelled in H2O2 solution by an ionic self-diffusiophoresis mechanism, which exhibits two motion modes, including linear motion and circular motion, due to different patch positions. Moreover, the degradation of organic dyes by the micromotors depending on the patches is demonstrated.
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Affiliation(s)
- Xunqiang Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Wenqing Xie
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Sinan Du
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Huaguang Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Zexin Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China
- Institute for Advanced Study, Soochow University, Suzhou 215006, China
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2
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Rilda Y, Rinaldi R, Syukri S, Armaini A, Refinel R, Agustien A, Pardi H. Biosynthesis of Zinc Oxide (ZnO) Using the Biomass of
Aspergillus niger
to Impart Cotton Fabric with Antimicrobial Properties. ChemistrySelect 2022. [DOI: 10.1002/slct.202103824] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Yetria Rilda
- Department of Chemistry Faculty Mathematics and Natural Sciences of Andalas University, Campus Unand Limau Padang 25163 Indonesia
| | - Rifki Rinaldi
- Department of Chemistry Faculty Mathematics and Natural Sciences of Andalas University, Campus Unand Limau Padang 25163 Indonesia
| | - Syukri Syukri
- Department of Chemistry Faculty Mathematics and Natural Sciences of Andalas University, Campus Unand Limau Padang 25163 Indonesia
| | - Armaini Armaini
- Department of Chemistry Faculty Mathematics and Natural Sciences of Andalas University, Campus Unand Limau Padang 25163 Indonesia
| | - Refinel Refinel
- Department of Chemistry Faculty Mathematics and Natural Sciences of Andalas University, Campus Unand Limau Padang 25163 Indonesia
| | - Anthoni Agustien
- Department of Biology Faculty Mathematics and Natural Sciences of Andalas University, Campus Unand Limau Padang 25163 Indonesia
| | - Hilfi Pardi
- Department of Chemistry Education Faculty of Teacher Training and Education Raja Ali Haji Maritime University Senggarang Tanjungpinang 29111 Indonesia
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3
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Zvoníček V, Stoklasa O, Trunov D, Sedlářová I, Boleslavská T, Němeček J, Lhotka M, Němeček J, Žvátora P, Šoóš M. Breakage Study of the Urchinlike Crystal Clusters of Ibrutinib. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vít Zvoníček
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technická 3, 16628 Prague 6, Czech Republic
- Zentiva, k.s., U kabelovny 130, 10237 Prague 10, Czech Republic
| | - Ondřej Stoklasa
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technická 3, 16628 Prague 6, Czech Republic
| | - Dan Trunov
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technická 3, 16628 Prague 6, Czech Republic
| | - Ivona Sedlářová
- Department of Inorganic Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague 6, Czech Republic
| | - Tereza Boleslavská
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technická 3, 16628 Prague 6, Czech Republic
- Zentiva, k.s., U kabelovny 130, 10237 Prague 10, Czech Republic
| | - Jiří Němeček
- Department of Mechanics, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech Republic
| | - Miloslav Lhotka
- Department of Inorganic Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague 6, Czech Republic
| | - Jiří Němeček
- Department of Mechanics, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech Republic
| | - Pavel Žvátora
- Zentiva, k.s., U kabelovny 130, 10237 Prague 10, Czech Republic
| | - Miroslav Šoóš
- Department of Chemical Engineering, University of Chemistry and Technology Prague, Technická 3, 16628 Prague 6, Czech Republic
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4
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Matta R, Yousafzai MS, Murrell M, Gonzalez AL. Endothelial cell secreted metalloproteinase-2 enhances neural stem cell N-cadherin expression, clustering, and migration. FASEB J 2021; 35:e21311. [PMID: 33417253 DOI: 10.1096/fj.202002302rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/09/2020] [Accepted: 12/11/2020] [Indexed: 11/11/2022]
Abstract
Neuroblasts have a clustered phenotype critical for their unidirectional migration, which in part is dependent on signaling from microvascular endothelial cells (EC) and pericytes (PC). Diffusible signals secreted by vascular cells have been demonstrated to increase survival, proliferation, and differentiation of subventricular zone resident neural stem cells (NSC); however, the signals that promote the necessary initiating step of NSC clustering are undefined. To investigate the role of vascular cells in promoting NSC clustering and directing migration, we created a 3-D hydrogel that mimics the biomechanics, biochemistry, and architectural complexity of brain tissue. We demonstrate that EC, and not PC, have a crucial role in NSC clustering and migration, further verified through microfluidic chamber systems and traction force microscopy. Ablation of the extended NSC aggregate arm halts aggregate movement, suggesting that clustering is a prerequisite for migration. When cultured with EC, NSC clustering occurs and NSC coincidentally increase their expression of N-cadherin, as compared to NSC cultured alone. NSC-presented N-cadherin expression was increased following exposure to EC secreted metalloproteinase-2 (MMP2). We demonstrate that inhibition of MMP2 prevented NSC N-cadherin surface expression and subsequent NSC clustering, even when NSC were in direct contact with EC. Furthermore, with exogenous activation of EGFR, which serves as a downstream activator of N-cadherin cleavage, NSC form clusters. Our results suggest that EC secretion of MMP2 promotes NSC clustering through N-cadherin expression. The insight gained about the mechanisms by which EC promote NSC migration may enhance NSC therapeutic response to sites of injury.
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Affiliation(s)
- Rita Matta
- Biomedical Engineering Department, Yale University, New Haven, CT, USA
| | - Muhammad Sulaiman Yousafzai
- Biomedical Engineering Department, Yale University, New Haven, CT, USA.,Systems Biology Institute, Yale University, West Haven, CT, USA
| | - Michael Murrell
- Biomedical Engineering Department, Yale University, New Haven, CT, USA.,Systems Biology Institute, Yale University, West Haven, CT, USA.,Physics Department, Yale University, New Haven, CT, USA
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5
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Padmanabhan SC, Collins TW, Pillai SC, McCormack DE, Kelly JM, Holmes JD, Morris MA. A conceptual change in crystallisation mechanisms of oxide materials from solutions in closed systems. Sci Rep 2020; 10:18414. [PMID: 33110206 PMCID: PMC7592049 DOI: 10.1038/s41598-020-75241-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 09/28/2020] [Indexed: 11/09/2022] Open
Abstract
Atomic and molecular level interactions in solutions dictate the structural and functional attributes of crystals. These features clearly dictate the properties of materials and their applicability in technologies. However, the microscopic phenomena of particle formation-nucleation and growth-in real systems are still not fully understood. Specifically, crystallisation occurring in closed systems are largely unproven. Combining coherent experimental data, we here demonstrate a fundamental nucleation-growth mechanism that occurs in a model zinc oxide system when particles are formed under continuous, rapid heating under closed reaction conditions. Defying all previous reports, we show that the nucleation commences only when the heating is terminated. A prenucleation clusters pathway is observed for nucleation, followed by crystallite assembly-growth. We show that the nucleation-growth processes result from temporal and dynamic activity of constituent ions and gaseous molecules in solution and by the irreversible expulsion of the dissolved gaseous molecules. We suggest that this nucleation process is generic to most closed systems that go through precipitation, and, therefore, important for the crystallisation of a variety of metal oxides, composites and minerals. We anticipate that the work may be a platform for future experimental and theoretical investigation promoting deeper understanding of the nucleation-growth phenomena of a variety of practical systems.
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Affiliation(s)
- Sibu C Padmanabhan
- Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College Dublin, College Green, Dublin 2, Ireland. .,School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland. .,School of Chemistry, University College Cork, College Road, Cork, T12 YN60, Ireland.
| | - Timothy W Collins
- School of Chemistry, University College Cork, College Road, Cork, T12 YN60, Ireland
| | - Suresh C Pillai
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Ash Lane, Sligo, F91 YW50, Ireland.,Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, Institute of Technology Sligo, Ash Lane, Sligo, F91 YW50, Ireland
| | - Declan E McCormack
- School of Chemical and Pharmaceutical Sciences, Technical University Dublin, City Campus, Kevin Street, Dublin 8, D02 HW71, Ireland
| | - John M Kelly
- School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Justin D Holmes
- Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College Dublin, College Green, Dublin 2, Ireland.,School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland.,School of Chemistry, University College Cork, College Road, Cork, T12 YN60, Ireland
| | - Michael A Morris
- Advanced Materials and BioEngineering Research (AMBER) Centre, Trinity College Dublin, College Green, Dublin 2, Ireland. .,School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland.
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6
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Ullattil SG, Jabeen Fatima MJ, Abdel-Wahab A. Defect minimized Ag-ZnO microneedles for photocatalysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:37036-37043. [PMID: 32577972 PMCID: PMC7456407 DOI: 10.1007/s11356-020-09433-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Abstract
A facile solution processing strategy has been developed for the formation of Ag-modified ZnO microneedles at various calcination temperatures such as 300, 500, and 700 °C (AZ3, AZ5, and AZ7 respectively). Due to the heavy doping of AgNO3, Ag+ ions have been incorporated in to the crystal lattice of ZnO in all the Ag-ZnO samples, which facilitated the formation of Ag-ZnO microneedle morphology with minimized defect states, and obviously, the plasmon peaks were observed due to Ag modification. These Ag-ZnO microneedle structures have been evaluated for their photocatalytic performance using methylene blue as model target contaminant and their activity was compared with the commercially available titania P25 photocatalyst. The photoactivity of all the Ag-ZnO microneedle structures was significantly higher than that of the commercially available P25 photocatalyst with the most active Ag-ZnO material having a photocatalytic activity ~ 1.4 times greater than that of P25 titania.
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Affiliation(s)
- Sanjay Gopal Ullattil
- Chemical Engineering Program, Texas A&M University at Qatar, 23874, Education City, Doha, Qatar.
| | - M J Jabeen Fatima
- Department of Nanoscience and Technology, University of Calicut, Malappuram, Kerala, 673635, India
| | - Ahmed Abdel-Wahab
- Chemical Engineering Program, Texas A&M University at Qatar, 23874, Education City, Doha, Qatar.
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7
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Nayak SK, Mishra A, Pradhan SS, Agarwal J. Two-different ways of synthesis for EG: Study of mechanical, thermal, and electrical properties of epoxy composite for TIMs. HIGH PERFORM POLYM 2020. [DOI: 10.1177/0954008320945383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The current study reports the synthesis of expanded graphite (EG) in two different ways and its fabrication with epoxy matrix to form composite at various filler fractions (5, 10, 12.5). One type EG (EG-C) is prepared by the electrochemical process using natural graphite flake (NGF), concentrated sulfuric acid, and ammonium persulfate, while the other (EG-P) is just mixing and heating of NGF with zinc nitrate hexahydrate. The functional groups of synthesized EG were confirmed by Fourier transform infrared spectroscopy. The surface morphology and microstructure of synthesized filler (EG-C, EG-P) were studied using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. An optimum through-plane thermal conductivity (TC) of 2.04 and 2.22 W/mK was observed in the case of the composites containing 12.5 wt% of EG-C and EG-P, respectively. The obtained experimental TC was compared with three numerical thermal models, that is, inverse rule of mixture, Maxwell–Eucken model, and Agari model. Furthermore, the thermal stability of both composites was compared by using a thermogravimetric analyzer. The electrical resistivity of EG-P/epoxy composite at different formulations was higher than the EG-C-filled epoxy composites.
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Affiliation(s)
- Sagar Kumar Nayak
- SARP-Laboratory for Advanced Research in Polymeric Materials, Central Institute of Plastics Engineering and Technology Bhubaneswar, Bhubaneswar, Odisha, India
| | - Arjyama Mishra
- SARP-Laboratory for Advanced Research in Polymeric Materials, Central Institute of Plastics Engineering and Technology Bhubaneswar, Bhubaneswar, Odisha, India
| | - Subhransu S Pradhan
- SARP-Laboratory for Advanced Research in Polymeric Materials, Central Institute of Plastics Engineering and Technology Bhubaneswar, Bhubaneswar, Odisha, India
| | - Jyoti Agarwal
- SARP-Laboratory for Advanced Research in Polymeric Materials, Central Institute of Plastics Engineering and Technology Bhubaneswar, Bhubaneswar, Odisha, India
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8
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Chen YC, Wu ZJ, Hsu YK. Enhancing the quasi-theoretical photocurrent density of ZnO nanorods via a lukewarm hydrothermal method. NANOSCALE 2020; 12:12292-12299. [PMID: 32285059 DOI: 10.1039/d0nr00058b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A ∼10-μm-long one-dimensional (1D) ZnO nanorod array (NRA) vertically oriented on a fluorine-doped tin oxide (FTO) coated glass substrate is successfully fabricated via a lukewarm hydrothermal method. The reflection of light from the rough surface of this ultralong ZnO NRA, resulting from the variation in the characteristic length of individual ZnO NRs in a tapered geometry, is largely suppressed. This in turn favors the ZnO NRA as a photoelectrode effectively harnessing UV-light for solar water splitting, as evidently manifested in the quasi-theoretical photocurrent density that reached ∼0.9 mA cm-2 at 1VAg/AgCl. A further contribution to such an outstanding performance stems from additional photocurrent generation by the ZnO NRA upon visible light illumination. This is attributed to a variety of native defects and the surface hydroxyl groups present in the ZnO NRA, giving rise to the mid-gap states that mediate the associated electronic transitions. Moreover, those lattice imperfections further boost the carrier concentration of the ZnO NRA to facilitate the carrier transport which in turn enhances the photoelectrochemical activity.
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Affiliation(s)
- Ying-Chu Chen
- China-UK Low Carbon College, Shanghai Jiao Tong University, No. 3, Yinlian Road, Lingang, Shanghai 201306, People's Republic of China
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9
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Xiong S, Liu X, Zhou J, Liu Y, Shen Y, Yin X, Wu J, Tao R, Fu Y, Duan H. Stability studies of ZnO and AlN thin film acoustic wave devices in acid and alkali harsh environments. RSC Adv 2020; 10:19178-19184. [PMID: 35515426 PMCID: PMC9054069 DOI: 10.1039/d0ra02448a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 05/11/2020] [Indexed: 11/21/2022] Open
Abstract
Surface acoustic wave (SAW) devices based on piezoelectric thin-films such as ZnO and AlN are widely used in sensing, microfluidics and lab-on-a-chip applications. However, for many of these applications, the SAW devices will inevitably be used in acid or alkali harsh environments, which may cause their early failures. In this work, we investigated the behavior and degradation mechanisms of thin film based SAW devices in acid and alkali harsh environments. Results show that under the acid and alkali attacks, chemical reaction and corrosion of ZnO devices are very fast (usually within 45 s). During the corrosion, the crystalline orientation of the ZnO film is not changed, but its grain defects are significantly increased and the grain sizes are decreased. The velocity of ZnO-based SAW devices is decreased due to the formation of porous structures induced by the chemical reactions. Whereas an AlN thin-film based SAW device does not perform well in acid–alkali conditions, it might be able to maintain a normal performance without obvious degradation for more than ten hours in acid or alkali solutions. This work could provide guidance for the applications of both ZnO or AlN-based SAW devices in acid/alkali harsh environments. Surface acoustic wave (SAW) devices based on piezoelectric thin-films such as ZnO and AlN are widely used in sensing, microfluidics and lab-on-a-chip applications.![]()
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10
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van Rijt MMJ, Oosterlaken BM, Joosten RRM, Wijkhuijs LEA, Bomans PHH, Friedrich H, de With G. Counter-ion influence on the mechanism of HMTA-mediated ZnO formation. CrystEngComm 2020. [DOI: 10.1039/d0ce00847h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The influence of the metal counter-ion on the mechanism of formation, nucleation location and the reaction product for the formation of ZnO under mild aqueous conditions is demonstrated.
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Affiliation(s)
- Mark M. J. van Rijt
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Bernette M. Oosterlaken
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Rick R. M. Joosten
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Levina E. A. Wijkhuijs
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Paul H. H. Bomans
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Heiner Friedrich
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
| | - Gijsbertus de With
- Laboratory of Physical Chemistry
- Center for Multiscale Electron Microscopy
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
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11
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Abstract
Functional ZnO nanostructured surfaces are important in a wide range of applications. Here we report the simple fabrication of ZnO surface structures at near room temperature with morphology resembling that of sea urchins, with densely packed, μm-long, tapered nanoneedles radiating from the urchin center. The ZnO urchin structures were successfully formed on several different substrates with high surface density and coverage, including silicon (Si), glass, polydimethylsiloxane (PDMS), and copper (Cu) sheets, as well as Si seeded with ZnO nanocrystals. Time-resolved SEM revealed growth kinetics of the ZnO nanostructures on Si, capturing the emergence of “infant” urchins at the early growth stage and subsequent progressive increases in the urchin nanoneedle length and density, whilst the spiky nanoneedle morphology was retained throughout the growth. ε-Zn(OH)2 orthorhombic crystals were also observed alongside the urchins. The crystal structures of the nanostructures at different growth times were confirmed by synchrotron X-ray diffraction measurements. On seeded Si substrates, a two-stage growth mechanism was identified, with a primary growth step of vertically aligned ZnO nanoneedle arrays preceding the secondary growth of the urchins atop the nanoneedle array. The antibacterial, anti-reflective, and wetting functionality of the ZnO urchins—with spiky nanoneedles and at high surface density—on Si substrates was demonstrated. First, bacteria colonization was found to be suppressed on the surface after 24 h incubation in gram-negative Escherichia coli (E. coli) culture, in contrast to control substrates (bare Si and Si sputtered with a 20 nm ZnO thin film). Secondly, the ZnO urchin surface, exhibiting superhydrophilic property with a water contact angle ~ 0°, could be rendered superhydrophobic with a simple silanization step, characterized by an apparent water contact angle θ of 159° ± 1.4° and contact angle hysteresis ∆θ < 7°. The dynamic superhydrophobicity of the surface was demonstrated by the bouncing-off of a falling 10 μL water droplet, with a contact time of 15.3 milliseconds (ms), captured using a high-speed camera. Thirdly, it was shown that the presence of dense spiky ZnO nanoneedles and urchins on the seeded Si substrate exhibited a reflectance R < 1% over the wavelength range λ = 200–800 nm. The ZnO urchins with a unique morphology fabricated via a simple route at room temperature, and readily implementable on different substrates, may be further exploited for multifunctional surfaces and product formulations.
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12
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Karlsson ME, Mamie YC, Calamida A, Gardner JM, Ström V, Pourrahimi AM, Olsson RT. Synthesis of Zinc Oxide Nanorods via the Formation of Sea Urchin Structures and Their Photoluminescence after Heat Treatment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5079-5087. [PMID: 29630844 DOI: 10.1021/acs.langmuir.8b01101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
A protocol for the aqueous synthesis of ca. 1-μm-long zinc oxide (ZnO) nanorods and their growth at intermediate reaction progression is presented, together with photoluminescence (PL) characteristics after heat treatment at temperatures of up to 1000 °C. The existence of solitary rods after the complete reaction (60 min) was traced back to the development of sea urchin structures during the first 5 s of the precipitation. The rods primarily formed in later stages during the reaction due to fracture, which was supported by the frequently observed broken rod ends with sharp edges in the final material, in addition to tapered uniform rod ends consistent with their natural growth direction. The more dominant rod growth in the c direction (extending the length of the rods), together with the appearance of faceted surfaces on the sides of the rods, occurred at longer reaction times (>5 min) and generated zinc-terminated particles that were more resistant to alkaline dissolution. A heat treatment for 1 h at 600 or 800 °C resulted in a smoothing of the rod surfaces, and PL measurements displayed a decreased defect emission at ca. 600 nm, which was related to the disappearance of lattice imperfections formed during the synthesis. A heat treatment at 1000 °C resulted in significant crystal growth reflected as an increase in luminescence at shorter wavelengths (ca. 510 nm). Electron microscopy revealed that the faceted rod structure was lost for ZnO rods exposed to temperatures above 600 °C, whereas even higher temperatures resulted in particle sintering and/or mass redistribution along the initially long and slender ZnO rods. The synthesized ZnO rods were a more stable Wurtzite crystal structure than previously reported ball-shaped ZnO consisting of merging sheets, which was supported by the shifts in PL spectra occurring at ca. 200 °C higher annealing temperature, in combination with a smaller thermogravimetric mass loss occurring upon heating the rods to 800 °C.
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Affiliation(s)
- Mattias E Karlsson
- KTH Royal Institute of Technology , School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, SE- 100 44 Stockholm , Sweden
| | - Yann C Mamie
- KTH Royal Institute of Technology , School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, SE- 100 44 Stockholm , Sweden
| | - Andrea Calamida
- KTH Royal Institute of Technology , School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, SE- 100 44 Stockholm , Sweden
| | - James M Gardner
- KTH Royal Institute of Technology , School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry , SE- 114 28 Stockholm , Sweden
| | - Valter Ström
- KTH Royal Institute of Technology , School of Industrial Engineering and Management, Material Science and Engineering, SE- 100 44 Stockholm , Sweden
| | - Amir Masoud Pourrahimi
- KTH Royal Institute of Technology , School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, SE- 100 44 Stockholm , Sweden
| | - Richard T Olsson
- KTH Royal Institute of Technology , School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, SE- 100 44 Stockholm , Sweden
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13
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Chatterjee A, Gale DJG, Grebennikov D, Whelan LD, Merschrod S EF. Surface potential and morphology mapping to investigate analyte adsorption effects on surface enhanced Raman scattering (SERS). Chem Commun (Camb) 2018; 53:12024-12027. [PMID: 29058738 DOI: 10.1039/c7cc05473d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrate the power of Kelvin probe force microscopy (KPFM) in enabling a comprehensive study of enhancement mechanisms of surface enhanced Raman scattering (SERS) through the correlation of surface electrical and topographical effects. Local electric fields generated on Au/ZnO nanohybrid films impact analyte adsorption, while roughness is linked to hotspot generation. Optimizing the interplay between these two effects yields SERS enhancement factors (EFs) of 106, enabling ppb detection of polycyclic aromatic hydrocarbons (PAHs) in water.
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Affiliation(s)
- Abhijit Chatterjee
- Department of Chemistry, Memorial University of Newfoundland, St. John's, NL A1B3X7, Canada.
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14
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Zammit I, Vaiano V, Iervolino G, Rizzo L. Inactivation of an urban wastewater indigenousEscherichia colistrain by cerium doped zinc oxide photocatalysis. RSC Adv 2018; 8:26124-26132. [PMID: 35541927 PMCID: PMC9082927 DOI: 10.1039/c8ra05020a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 07/16/2018] [Indexed: 11/21/2022] Open
Abstract
Heterogeneous photocatalysis (HPC) is a subset of Advanced Oxidation Processes (AOPs) with potential future applications in water disinfection. Herein, a zinc oxide photocatalyst was doped with cerium at various atomic ratios ranging from 0 to 0.1 Ce : Zn. Keeping in mind that the application of HPC is often limited by its cost of use, a simple and easy to upscale method, that is the hydroxide induced hydrolysis of zinc nitrate in the presence of Ce3+ followed by calcination at 300 °C, was used to synthesise the catalysts. The catalysts have been characterized by different techniques such as X-ray diffraction (XRD), UV-vis diffuse reflectance (UV-vis DRS) and Raman spectroscopy. XRD results showed that Ce3+ ions were successfully incorporated into the ZnO lattice. UV-vis DRS spectra evidenced that Ce–ZnO samples present band-gap values of about 2.97 eV, lower than those of undoped ZnO (3.21 eV). These various photocatalysts, at 0.1 g L−1 in saline 0.85%, were used to inactivate Escherichia coli previously isolated from an urban wastewater treatment plant. Higher atomic ratios of Ce in the ZnO lattice, as confirmed by XRD and Raman spectroscopy, showed significant improvements to the inactivation rate; the resulting recommended optimum cerium loading of 0.04 : 1 Ce : Zn gave multiple orders of magnitude higher rate of inactivation after 60 min of treatment when compared to un-doped ZnO. This optimum loading of cerium was faster than the de facto literature standard TiO2-P25 tested under identical conditions. Doping of ZnO with cerium at 0.04 : 1 Ce : Zn at/at gives substantial improvements in rate of photocatalytic inactivation of E. coli over undoped ZnO.![]()
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Affiliation(s)
- Ian Zammit
- Department of Civil Engineering
- University of Salerno
- Italy
| | - Vincenzo Vaiano
- Department of Industrial Engineering
- University of Salerno
- Italy
| | | | - Luigi Rizzo
- Department of Civil Engineering
- University of Salerno
- Italy
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15
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Galeazzi R, González-Panzo IJ, Díaz-Becerril T, Morales C, Rosendo E, Silva R, Romano-Trujillo R, Coyopol A, Nieto-Caballero FG, Treviño-Yarce L. Physicochemical conditions for ZnO films deposited by microwave chemical bath deposition. RSC Adv 2018; 8:8662-8670. [PMID: 35539881 PMCID: PMC9078622 DOI: 10.1039/c8ra00065d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 02/16/2018] [Indexed: 12/30/2022] Open
Abstract
Physicochemical analysis was carried out to obtain the species distribution diagrams (SDDs) for the deposition of ZnO films as a function of OH− ion concentration ([OH−]) in the reaction solution. The study of SDDs predicts nucleation and ZnO film growth by means of the dominant species at a given pH value. To confirm this, a series of experiments were made varying the [OH−] in the reaction solution and keeping the others parameters constant. Structured zinc oxide (ZnO) films were obtained on glass substrates by microwave chemical bath deposition (MWCBD). Structural, optical and morphological ZnO film properties were investigated as a function of [OH−]. X-Ray diffraction technique (XRD) measurements show multiple diffraction peaks, indicating the polycrystalline nature of ZnO films. Scanning Electron Microscopy (SEM) images of ZnO structures showed morphological changes with the variation of [OH−]. The stoichiometry of the structures changed as the [OH−] was varied in solution. From Raman spectra, it was observed that the [OH−] of the reaction mixture strongly affects the crystal quality of ZnO structures. A reaction pathway for the synthesis of ZnO structures based on our results is proposed. Experimental results are consistent with the physical–chemical analysis. Physicochemical analysis was carried out to obtain the species distribution diagrams (SDDs) for the deposition of ZnO films as a function of OH− ion concentration ([OH−]) in the reaction solution.![]()
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Affiliation(s)
- R. Galeazzi
- CIDS-ICUAP
- Benemérita Universidad Autónoma de Puebla
- Puebla
- México
| | | | | | - C. Morales
- CIDS-ICUAP
- Benemérita Universidad Autónoma de Puebla
- Puebla
- México
| | - E. Rosendo
- CIDS-ICUAP
- Benemérita Universidad Autónoma de Puebla
- Puebla
- México
| | - R. Silva
- IFUAP
- Benemérita Universidad Autónoma de Puebla
- Puebla
- México
| | | | - A. Coyopol
- CIDS-ICUAP
- Benemérita Universidad Autónoma de Puebla
- Puebla
- México
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16
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Koike N, Iyoki K, Keoh SH, Chaikittisilp W, Okubo T. Synthesis of New Microporous Zincosilicates with CHA Zeolite Topology as Efficient Platforms for Ion-Exchange of Divalent Cations. Chemistry 2017; 24:808-812. [DOI: 10.1002/chem.201705277] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Natsume Koike
- Department of Chemical System Engineering; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Kenta Iyoki
- Department of Chemical System Engineering; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Sye Hoe Keoh
- Department of Chemical System Engineering; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Watcharop Chaikittisilp
- Department of Chemical System Engineering; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Tatsuya Okubo
- Department of Chemical System Engineering; The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
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17
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Carp O, Tirsoaga A, Ene R, Ianculescu A, Negrea RF, Chesler P, Ionita G, Birjega R. Facile, high yield ultrasound mediated protocol for ZnO hierarchical structures synthesis: Formation mechanism, optical and photocatalytic properties. ULTRASONICS SONOCHEMISTRY 2017; 36:326-335. [PMID: 28069217 DOI: 10.1016/j.ultsonch.2016.12.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 11/28/2016] [Accepted: 12/05/2016] [Indexed: 06/06/2023]
Abstract
Hierarchical flowers-like zinc oxide structures have been successfully obtained by a simple and fast ultrasound-assisted method performed in a ordinary ultrasonic bath using an ammonia solution and zinc acetate, in the absence of any surfactant or template. The composition, structure, crystallinity, morphology and optical properties of the materials obtained at different ultrasound irradiation times were characterized by infrared, UV-Vis and photoluminescence spectroscopy, X-ray diffraction, scanning and transmission electron microscopy investigations. It was proved that the ultrasound irradiation time manipulates both the defect content (implicit the photoluminescent properties) and morphology of the ZnO materials: shorter irradiation times leads to the synthesis of high-defected ZnO structures of flower morphology with triangular-shaped petals, while higher irradiation times favours the formation of low-defected ZnO structures with tipped rod-like petals. A plausible growth mechanism of the architectures that implies aggregation via oriented attachment followed by an Ostwald ripening is advanced based on these results. The ZnO flower-like structures present high photocatalytic activities, a total phenol mineralization being registered in the case of visible light experiments. Electron-spin resonance measurements demonstrate the generation of reactive oxygen species, namely hydroxyl radicals but also C centred radicals adducts derived most probable from the residual acetate adsorbed on ZnO surface.
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Affiliation(s)
- Oana Carp
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania.
| | - Alina Tirsoaga
- University of Bucharest, Physical Chemistry Department, Bd. Elisabeta 4-12, 030018 Bucharest, Romania
| | - Ramona Ene
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
| | - Adelina Ianculescu
- "Politechnica" University of Bucharest, Gh. Polizu Street no. 1-7, 011061 Bucharest, Romania
| | - Raluca F Negrea
- National Institute for Materials Physics, Atomistilor Street no. 105 bis, P.O. Box Mg-7, Bucharest-Magurele R-077125, Romania
| | - Paul Chesler
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
| | - Gabriela Ionita
- "Ilie Murgulescu" Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania
| | - Ruxandra Birjega
- National Institute for Lasers, Plasma and Radiation Physics, P.O. Box Mg-27, Bucharest-Magurele, Romania
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18
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Samadipakchin P, Mortaheb HR, Zolfaghari A. ZnO nanotubes: Preparation and photocatalytic performance evaluation. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.01.018] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Sol-Gel Syntheses of Zinc Oxide and Hydrogenated Zinc Oxide (ZnO:H) Phases. JOURNAL OF NANOTECHNOLOGY 2017. [DOI: 10.1155/2017/5219850] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
ZnO synthesized by chemical precipitation with varying starch concentrations (0.00, 0.01, 0.02, 0.05, 0.10, 0.15, and 0.20%) as stabilizing agent was used in making ZnO:H when placed in a glass tube under mild heat and hydrogen (H2) gas flow for 2 mins. Observations showed that the sample colour changed from white to light brown and finally to dark brown during the process particularly for the ZnO-starch samples. XRD data of ZnO (0.02%) and ZnO:H (0.02%) showed ZnO as the major phase with Zn(OH)2 impurity phase and a new ZnO:H peak at 2θ, 29.60° for ZnO and ZnO:H, respectively. The estimated particle sizes determined from XRD were 47 and 30 nm, respectively. The SEM of the 0.02% ZnO appeared more microporous and needle-like than those of 0.01%, while the EDX of both confirmed Zn and O as the main components. Different conductivities of 30.90 and 27.50 μS/cm were obtained for ZnO and ZnO:H samples in ethanol, respectively. Also, the UV-Vis absorption for both showed n-type and p-type material absorption bands at 310 cm−1, while the intensities of all the characteristic ZnO IR bands at 430–552 (ZnO vibrations) and 1500–1640 cm−1 (Zn-O stretching) increased for the corresponding ZnO:H samples.
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20
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Kegel J, Halpin J, Laffir F, Povey IM, Pemble ME. Rapid low-temperature solution growth of ZnO:Co nanorod arrays with controllable visible light absorption. CrystEngComm 2017. [DOI: 10.1039/c7ce00378a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Ghica D, Vlaicu ID, Stefan M, Nistor LC, Nistor SV. On the agent role of Mn2+ in redirecting the synthesis of Zn(OH)2 towards nano-ZnO with variable morphology. RSC Adv 2016. [DOI: 10.1039/c6ra23065b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Evidence of manganese induced redirection of the Zn(OH)2 synthesis towards nanostructured ZnO:Mn, not observed for other M(ii)(OH)2 compounds.
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Affiliation(s)
- Daniela Ghica
- National Institute of Materials Physics
- Magurele
- Romania
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22
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Construction of Zinc Oxide into Different Morphological Structures to Be Utilized as Antimicrobial Agent against Multidrug Resistant Bacteria. Bioinorg Chem Appl 2015; 2015:536854. [PMID: 26451136 PMCID: PMC4588359 DOI: 10.1155/2015/536854] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 08/20/2015] [Indexed: 12/23/2022] Open
Abstract
Nano-ZnO has been successfully implemented in particles, rods, and tubes nanostructures via sol-gel and hydrothermal techniques. The variation of the different preparation parameters such as reaction temperature, time, and stabilizer agents was optimized to attain different morphological structures. The influence of the microwave annealing process on ZnO crystallinity, surface area, and morphological structure was monitored using XRD, BET, and SEM techniques, respectively. The antimicrobial activity of zinc oxide produced in nanotubes structure was examined against four different multidrug resistant bacteria: Gram-positive (Staphylococcus aureus and Bacillus subtilis) and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) strains. The activity of produced nano-ZnO was determined by disc diffusion technique and the results revealed that ZnO nanotubes recorded high activity against the studied strains due to their high surface area equivalent to 17.8 m2/g. The minimum inhibitory concentration (MIC) of ZnO nanotubes showed that the low concentrations of ZnO nanotubes could be a substitution for the commercial antibiotics when approached in suitable formula. Although the annealing process of ZnO improves the degree of material crystallinity, however, it declines its surface area and consequently its antimicrobial activity.
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23
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Chai L, Yan X, Li Q, Yang B, Wang X, Wang Q. Enhancement of ZnO particles aggregation and sedimentation using polysaccharide and amino acid: Importance in abiological granular sludge (ABGS) formation. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.07.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Fricke M, Voigt A, Veit P, Sundmacher K. Miniemulsion-Based Process for Controlling the Size and Shape of Zinc Oxide Nanoparticles. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b01149] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael Fricke
- Max Planck Institute for Dynamics of Complex Technical Systems, 39106 Magdeburg, Germany
- Process
Systems Engineering, Otto-von-Guericke University Magdeburg, 39106 Magdeburg, Germany
| | - Andreas Voigt
- Process
Systems Engineering, Otto-von-Guericke University Magdeburg, 39106 Magdeburg, Germany
| | - Peter Veit
- Institute
for Experimental Physics, Otto-von-Guericke University Magdeburg, 39106 Magdeburg, Germany
| | - Kai Sundmacher
- Max Planck Institute for Dynamics of Complex Technical Systems, 39106 Magdeburg, Germany
- Process
Systems Engineering, Otto-von-Guericke University Magdeburg, 39106 Magdeburg, Germany
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25
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Lee HJ, Jin Y, Park SS, Hong SS, Lee GD. Photocatalytic Degradation of Rhodamine B Using Cd 0.5Zn 0.5S/ZnO Photocatalysts under Visible Light Irradiation. APPLIED CHEMISTRY FOR ENGINEERING 2015. [DOI: 10.14478/ace.2015.1046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Shi Z, Walker AV. Chemical bath deposition of ZnO on functionalized self-assembled monolayers: selective deposition and control of deposit morphology. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:1421-8. [PMID: 25587750 DOI: 10.1021/la5040239] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We have developed a method by which to selectively and reproducibly deposit ZnO films on functionalized self-assembled monolayers (SAMs) using chemical bath deposition (CBD). The deposition bath is composed of zinc acetate and ethylenediamine. The deposition reaction pathways are shown to be similar to those observed for sulfides and selenides, even though ethylenediamine acts as both an oxygen source and a complexing agent. On -COOH terminated SAMs, Zn-carboxylate surface complexes act as nucleation sites for ion-by-ion growth, leading to the formation of adherent ZnO nanocrystallites. Cluster-by-cluster growth is also observed, which produces weakly adherent micrometer-sized ZnO crystallites. On -CH3 and -OH terminated SAMs, only micrometer-sized ZnO crystallites are observed because Zn(2+) does not complex with the SAM terminal group, preventing nucleation of the nanocrystalline phase. The application of either ultrasound ("sonication-assisted CBD") or stirring promotes ion-by-ion ZnO growth on -COOH terminated SAMs. Stirring produces smoother but less reproducible ZnO films than sonication-assisted CBD.
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Affiliation(s)
- Zhiwei Shi
- Department of Materials Science and Engineering, RL 10, University of Texas at Dallas , 800 West Campbell Road, Richardson, Texas 75080, United States
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27
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Wang M, Jiang L, Kim EJ, Hahn SH. Electronic structure and optical properties of Zn(OH)2: LDA+U calculations and intense yellow luminescence. RSC Adv 2015. [DOI: 10.1039/c5ra17024a] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Assigned U values in the LDA+U calculations should assure an appropriate overlap of the p−d states.
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Affiliation(s)
- Mingsong Wang
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang 212013
- China
| | - Lingxia Jiang
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang 212013
- China
| | - Eui Jung Kim
- Department of Chemical Engineering
- University of Ulsan
- Ulsan 680-749
- South Korea
| | - Sung Hong Hahn
- Department of Physics and Energy Harvest-Storage Research Center
- University of Ulsan
- Ulsan 680-749
- South Korea
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28
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Das R, Kumar A, Kumar Y, Sen S, Shirage PM. Effect of growth temperature on the optical properties of ZnO nanostructures grown by simple hydrothermal method. RSC Adv 2015. [DOI: 10.1039/c5ra07135f] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Here we report an easy and rapid synthesis technique of wurtzite ZnO nanostructures in the form of flowers, nano-rods and nano-tubes that are achieved by a facile hydrothermal method.
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Affiliation(s)
- Rajasree Das
- Department of Physics
- Indian Institute of Technology Indore
- Simrol Campus
- Indore-452020
- India
| | - Amit Kumar
- Department of Physics
- Indian Institute of Technology Indore
- Simrol Campus
- Indore-452020
- India
| | - Yogendra Kumar
- Centre for Materials Science and Engineering
- Indian Institute of Technology Indore
- Simrol Campus
- Indore-452020
- India
| | - Somaditya Sen
- Department of Physics
- Indian Institute of Technology Indore
- Simrol Campus
- Indore-452020
- India
| | - Parasharam M. Shirage
- Department of Physics
- Indian Institute of Technology Indore
- Simrol Campus
- Indore-452020
- India
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29
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Mostafa NY, Heiba ZK, Ibrahim MM. Structure and optical properties of ZnO produced from microwave hydrothermal hydrolysis of tris(ethylenediamine)zinc nitrate complex. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.09.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Li X, Wang C, Zhou X, Liu J, Sun P, Lu G. Gas sensing properties of flower-like ZnO prepared by a microwave-assisted technique. RSC Adv 2014. [DOI: 10.1039/c4ra07425d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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31
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Wang S, Wang P, Li Z, Xiao C, Xiao B, Zhao R, Yang T, Zhang M. Highly enhanced methanol gas sensing properties by Pd0.5Pd3O4nanoparticle loaded ZnO hierarchical structures. RSC Adv 2014. [DOI: 10.1039/c4ra05462h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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32
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Bagheri M, Azizian S, Jaleh B, Chehregani A. Adsorption of Cu(II) from aqueous solution by micro-structured ZnO thin films. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.10.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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33
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Liang S, Zhu L, Gai G, Yao Y, Huang J, Ji X, Zhou X, Zhang D, Zhang P. Synthesis of morphology-controlled ZnO microstructures via a microwave-assisted hydrothermal method and their gas-sensing property. ULTRASONICS SONOCHEMISTRY 2014; 21:1335-1342. [PMID: 24618526 DOI: 10.1016/j.ultsonch.2014.02.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 11/20/2013] [Accepted: 02/07/2014] [Indexed: 06/03/2023]
Abstract
Controllable ZnO architectures with flower-like and rod-like morphologies were synthesized via a microwave-assisted hydrothermal method. By adjusting the concentration of Zn(2+) in the aqueous precursors, different morphologies of ZnO microstructures were obtained. The size of ZnO was uniform after ultrasonic treatment. The growth process of ZnO in solution was studied by monitoring the intermediate products, which were extracted at different stages of the reactions: (i) precursor preparation, (ii) microwave irradiation heating, (iii) natural cooling. Studies of the SEM images and XRD data revealed that the formation of ZnO occurred via in situ assembly or dissolution-reprecipitation of zinc hydroxide complexes. The morphology-dependent ethanol sensing performance was observed; the seven-spine ZnO structures exhibit the highest activity.
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Affiliation(s)
- Sa Liang
- School of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Lianfeng Zhu
- Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China
| | - Guosheng Gai
- Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China
| | - Youwei Yao
- Graduated School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China
| | - Jue Huang
- Graduated School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China
| | - Xuewen Ji
- Shenzhen Dovelet Sensors Technology Co., Ltd., Shenzhen 518057, PR China
| | - Xiaoming Zhou
- School of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Dongyun Zhang
- School of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Peixin Zhang
- School of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, PR China.
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34
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Patra AK, Dutta A, Bhaumik A. Self-assembled ultra small ZnO nanocrystals for dye-sensitized solar cell application. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2014.03.036] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Zhang XL, Dai HT, Zhao JL, Wang SG, Sun XW. Surface-morphology evolution of ZnO nanostructures grown by hydrothermal method. CRYSTAL RESEARCH AND TECHNOLOGY 2014. [DOI: 10.1002/crat.201300334] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- X. L. Zhang
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science; Tianjin University; Tianjin 300072 China
| | - H. T. Dai
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science; Tianjin University; Tianjin 300072 China
| | - J. L. Zhao
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science; Tianjin University; Tianjin 300072 China
| | - S. G. Wang
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science; Tianjin University; Tianjin 300072 China
| | - X. W. Sun
- South University of Science and Technology of China; Shenzhen Guangdong China
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36
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Lin Z, Guo F, Wang C, Wang X, Wang K, Qu Y. Preparation and sensing properties of hierarchical 3D assembled porous ZnO from zinc hydroxide carbonate. RSC Adv 2014. [DOI: 10.1039/c3ra45254a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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37
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Preparation of "Cauliflower-Like" ZnO Micron-Sized Particles. MATERIALS 2013; 6:5234-5246. [PMID: 28788386 PMCID: PMC5452773 DOI: 10.3390/ma6115234] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 11/04/2013] [Accepted: 11/07/2013] [Indexed: 11/16/2022]
Abstract
Porous polydivinyl benzene (PDVB) microspheres of narrow size distribution were formed by a single-step swelling process of template uniform polystyrene microspheres with divinyl benzene (DVB), followed by polymerization of the DVB within the swollen template microspheres. The PDVB porous particles were then formed by dissolution of the template polystyrene polymer. Unique “cauliflower-like” ZnO microparticles were prepared by the entrapping of the ZnO precursor ZnCl2 in the PDVB porous microspheres under vacuum, followed by calcination of the obtained ZnCl2-PDVB microspheres in an air atmosphere. The morphology, crystallinity and fluorescence properties of those ZnO microparticles were characterized. This “cauliflower-like” shape ZnO particles is in contrast to a previous study demonstrated the preparation of spherical shaped porous ZnO and C-ZnO microparticles by a similar method, using zinc acetate (ZnAc) as a precursor. Two diverted synthesis mechanisms for those two different ZnO microparticles structures are proposed, based on studies of the distribution of each of the ZnO precursors within the PDVB microspheres.
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Majithia R, Speich J, Meissner KE. Mechanism of Generation of ZnO Microstructures by Microwave-Assisted Hydrothermal Approach. MATERIALS 2013; 6:2497-2507. [PMID: 28809286 PMCID: PMC5458951 DOI: 10.3390/ma6062497] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 05/21/2013] [Accepted: 06/13/2013] [Indexed: 11/16/2022]
Abstract
In this report, a technique for rapid synthesis of ZnO microstructures by microwave-assisted heating of precursors at hydrothermal conditions is demonstrated. Further, the reaction mechanism for the growth of ZnO microstructures is analyzed. An accelerated rate of reaction obtained using microwaves enables a dissolution-recrystallization mechanism for generation of one dimensional (1D) rod-like structures, thereby showing that time of reaction can be used to dictate ZnO microstructure morphology.
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Affiliation(s)
- Ravish Majithia
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Jeffrey Speich
- Department of Biomedical Engineering, 5045 ETB, Texas A&M University, TX 77843, USA.
| | - Kenith E Meissner
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA.
- Department of Biomedical Engineering, 5045 ETB, Texas A&M University, TX 77843, USA.
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Demirkıran N. Recovery of Zinc Ions From the Resulting Solution after Copper Cementation with Metallic Zinc. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2012.710702] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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40
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Hazra C, Sarkar S, Meesaragandla B, Mahalingam V. Eu3+ ions as an optical probe to follow the growth of colloidal ZnO nanostructures. Dalton Trans 2013; 42:11981-6. [DOI: 10.1039/c3dt51506k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Wang M, Zhang Y, Zhou Y, Yang F, Kim EJ, Hahn SH, Seong SG. Rapid room-temperature synthesis of nanosheet-assembled ZnO mesocrystals with excellent photocatalytic activity. CrystEngComm 2013. [DOI: 10.1039/c2ce26660a] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Influence of UV irradiation and two photon processing on the cinnamate monomers polymerization and formation of hybrid composites with nanosized ZnO. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2012.09.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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43
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The effect of sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB) on the Properties of ZnO synthesized by hydrothermal method. Int J Mol Sci 2012. [PMID: 23202952 PMCID: PMC3497326 DOI: 10.3390/ijms131013275] [Citation(s) in RCA: 167] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
ZnO nanostructures were synthesized by hydrothermal method using different molar ratios of cetyltrimethylammonium bromide (CTAB) and Sodium dodecyl sulfate (SDS) as structure directing agents. The effect of surfactants on the morphology of the ZnO crystals was investigated by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) techniques. The results indicate that the mixture of cationic-anionic surfactants can significantly modify the shape and size of ZnO particles. Various structures such as flakes, sheets, rods, spheres, flowers and triangular-like particles sized from micro to nano were obtained. In order to examine the possible changes in other properties of ZnO, characterizations like powder X-ray diffraction (PXRD), thermogravimetric and differential thermogravimetric analysis (TGA-DTG), FTIR, surface area and porosity and UV-visible spectroscopy analysis were also studied and discussed.
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Patil SL, Pawar SG, Chougule MA, Raut BT, Godse PR, Sen S, Patil VB. Structural, Morphological, Optical, and Electrical Properties of PANi-ZnO Nanocomposites. INT J POLYM MATER PO 2012. [DOI: 10.1080/00914037.2011.610051] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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45
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Ji XB, Lu WC, Ma HP. Photoluminescent hierarchical Zno micro-flower and its surface wettability. CRYSTAL RESEARCH AND TECHNOLOGY 2012. [DOI: 10.1002/crat.201200276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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46
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Comparison between synthesis techniques to obtain ZnO nanorods and its effect on dye sensitized solar cells. ADV POWDER TECHNOL 2012. [DOI: 10.1016/j.apt.2011.08.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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47
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Wang L, Tsan D, Stoeber B, Walus K. Substrate-free fabrication of self-supporting ZnO nanowire arrays. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:3999-4004. [PMID: 22700444 DOI: 10.1002/adma.201200928] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 03/27/2012] [Indexed: 06/01/2023]
Abstract
Thin films composed of self-supporting ZnO nanowire arrays are fabricated via a hydrothermal approach without the presence of any substrates. The films can be transferred and bonded to an arbitrary substrate for device applications. As a demonstration, a piezoelectric converter is made which is able to generate electric charge under compressive forces.
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Affiliation(s)
- Lisheng Wang
- Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, Canada.
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Gordon T, Kopel M, Grinblat J, Banin E, Margel S. New synthesis, characterization and antibacterial properties of porous ZnO and C-ZnO micrometre-sized particles of narrow size distribution. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15510a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Wang AJ, Liao QC, Feng JJ, Zhang PP, Li AQ, Wang JJ. Apple pectin-mediated green synthesis of hollow double-caged peanut-like ZnO hierarchical superstructures and photocatalytic applications. CrystEngComm 2012. [DOI: 10.1039/c1ce05830d] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Moonoosawmy KR, Es-Souni M, Minch R, Dietze M, Es-Souni M. Template-assisted generation of three-dimensionally branched titaniananotubes on a substrate. CrystEngComm 2012. [DOI: 10.1039/c1ce06064c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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