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Gebretsadik A, Kefale B, Sori C, Tsegaye D, Ananda Murthy HC, Abebe B. Cu-doped ZnO/Ag/CuO heterostructure: superior photocatalysis and charge transfer. RSC Adv 2024; 14:29763-29773. [PMID: 39301231 PMCID: PMC11409720 DOI: 10.1039/d4ra05989a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2024] [Accepted: 09/13/2024] [Indexed: 09/22/2024] Open
Abstract
Doped semiconductor heterostructures have superior properties compared to their components. In this study, we observed the synthesis of Cu-doped ZnO/Ag/CuO heterostructure with the presence of charge transfer and visible light-harvesting properties resulting from doping and heterojunction. The porous heterostructures were prepared using the bottom-up combustion (BUC) approach. This method generated porous heterostructures by eliminating gaseous by-products. X-ray diffraction (XRD) optimization revealed that the ideal conditions included 1.00 g of polyvinyl alcohol (PVA), a synthesis temperature of 50 °C, and a 1 hour calcination time. Introducing copper (Cu) into the zinc oxide (ZnO) lattice caused a high-angle shift in the XRD pattern peaks. High-resolution transmission electron microscopy (HRTEM) images and XRD patterns confirmed the formation of Cu-doped ZnO/Ag/CuO (c-zac) heterostructures. Elemental mapping analysis confirmed the even surface distribution of Ag metal. The c-zac heterostructures exhibited superior optoelectrical and charge transfer properties compared to single ZnO. The heterostructures demonstrated improved methylene blue (MB) dye degradation potential (k = 0.065 min-1) compared to single ZnO (k = 0.0041 min-1). This photocatalytic potential is attributed to enhanced light absorption and charge transfer properties. The extended visible light absorption resulted from CuO and Ag's surface plasmon resonance properties. The selected 15c-zac heterostructure also performed well in a reusability photocatalytic test, remaining effective until the 3rd cycle. Consequently, this heterostructure holds promise for scaling up as a catalyst for environmental remediation.
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Affiliation(s)
- Abbay Gebretsadik
- Department of Applied Chemistry, Adama Science and Technology University 1888 Adama Ethiopia
| | - Bontu Kefale
- Department of Applied Chemistry, Adama Science and Technology University 1888 Adama Ethiopia
| | - Chaluma Sori
- Department of Applied Chemistry, Adama Science and Technology University 1888 Adama Ethiopia
| | - Dereje Tsegaye
- Department of Applied Chemistry, Adama Science and Technology University 1888 Adama Ethiopia
| | - H C Ananda Murthy
- School of Applied Sciences, Papua New Guinea University of Technology Lae Morobe Province 411 Papua New Guinea
| | - Buzuayehu Abebe
- Department of Applied Chemistry, Adama Science and Technology University 1888 Adama Ethiopia
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2
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Wang F, Yue S, Han X, Zhang T, Han A, Wang L, Liu J. ZnS/C Dual-Quantum-Dots Heterostructural Nanofibers for High-Performance Photocatalytic H 2O 2 Production. ACS APPLIED MATERIALS & INTERFACES 2024; 16:2606-2613. [PMID: 38175744 DOI: 10.1021/acsami.3c14183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Constructing heterostructures of dual quantum-dots (QDs) is a promising way to achieve high performance in photocatalysis, but it still faces substantial synthetic challenges. Herein, we developed an in situ transformation strategy to coassemble ZnS QDs and C QDs into dual-quantum-dot heterostructural nanofibers (ZnS/C-DQDH). Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy results revealed the formation of strong Zn-O-C bonds at the interface between ZnS QDs and C QDs, improving the separation efficiency of photogenerated charge carriers. The ZnS/C-DQDH demonstrated remarkable photocatalytic activity in H2O2 production, with generation rates of 2896.4 μmol gcat-1 h-1 without sacrificial agents and 9879.3 μmol gcat-1 h-1 with ethanol as the sacrificial agent, significantly higher than the QD counterparts and surpassed state-of-the-art photocatalysts. Moreover, due to the nanofibrous feature, ZnS/C-DQDH demonstrated excellent stability and facile recyclability. This work provides a facile and large scalable method to gain dual-quantum-dot heterostructures and a promising alternative for photocatalytic H2O2 production.
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Affiliation(s)
- Fanping Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Shuang Yue
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Xu Han
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Tianyu Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Aijuan Han
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Lianying Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Junfeng Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
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3
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Al-Gaashani R, Pasha M, Jabbar KA, Shetty AR, Baqiah H, Mansour S, Kochkodan V, Lawler J. Antimicrobial activity of ZnO-Ag-MWCNTs nanocomposites prepared by a simple impregnation-calcination method. Sci Rep 2023; 13:21418. [PMID: 38049503 PMCID: PMC10695929 DOI: 10.1038/s41598-023-48831-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 11/30/2023] [Indexed: 12/06/2023] Open
Abstract
Zinc oxide (ZnO) nanorods and ZnO nanostructures composited with silver (Ag) and multi-walled carbon nanotubes (MWCNTs) have been synthesized by a simple impregnation-calcination method and have been shown to be suitable for use as antimicrobial agents. The preparation method used for composite materials is very simple, time-effective, and can be used for large-scale production. Several analytical techniques, including X-ray diffraction (XRD), scanning electron spectroscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and Fourier transmission infrared spectroscopy (FTIR), have been used to characterize the prepared ZnO-Ag-MWCNT composite materials. The effects on structural, morphological, and antimicrobial properties of (ZnO)100-x (Ag)x nanocomposites at various weight ratios (x = 0, 5, 10, 30, and 50 wt%) have been investigated. The antimicrobial properties of ZnO composited with Ag nanoparticles and MWCNTs towards both gram-positive and gram-negative bacteria species were studied. The effect of raw MWCNTs and MWCNTs composited with ZnO and Ag on the cell morphology and chemical composition of Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) was studied by SEM and EDS, respectively. It was found that composite materials made of ZnO-Ag-MWCNTs exhibit greater antibacterial activities toward the microorganisms E. coli and S. aureus than ZnO-Ag, which could be beneficial for efficient antimicrobial agents in water and air treatment applications.
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Affiliation(s)
- Rashad Al-Gaashani
- Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, 34110, Doha, Qatar.
| | - Mujaheed Pasha
- HBKU Core Labs, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Khadeeja Abdul Jabbar
- Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, 34110, Doha, Qatar
| | - Akshath R Shetty
- HBKU Core Labs, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Hussein Baqiah
- Shandong Key Laboratory of Biophysics, Institute of Biophysics, Dezhou University, No.566 University Rd. West, Dezhou, Shandong, China
| | - Said Mansour
- HBKU Core Labs, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Viktor Kochkodan
- Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, 34110, Doha, Qatar
| | - Jenny Lawler
- Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, 34110, Doha, Qatar
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4
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Sitinjak EM, Masmur I, Hutajulu PE, Marbun NVMD, Gultom G. Electrospun Nanofiber Mats with Embedded Zinc Oxysulfide for Photoreduction of Nitrobenzene to Aniline under Mild Condition. ACS OMEGA 2023; 8:35328-35335. [PMID: 37779950 PMCID: PMC10536102 DOI: 10.1021/acsomega.3c05171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 08/29/2023] [Indexed: 10/03/2023]
Abstract
In this work, electrospun nanofiber embedded with zinc oxysulfide (Zn(O,S)) has been demonstrated as an efficient and robust photocatalyst for hydrogenation of nitrobenzene to aniline under solar light irradiation at mild conditions with methanol as the hole scavenger. The solid solution state of Zn(O,S) in electrospun nanofiber was successfully revealed by high-resolution transmission electron microscopy and X-ray diffraction analyses in which the lattice fringes and diffraction planes located in between those of ZnO and ZnS phases. Moreover, the electrochemical and optical properties of Zn(O,S) embedded in polyethylene oxide (PEO) nanofiber are found to be better than those of ZnO and ZnS indicating more efficient photocatalytic activities as well. The photocatalytic hydrogenation of nitrobenzene to aniline occurred completely within 2 h of the photocatalytic reaction with a reusability of 95% after five consecutive runs. Finally, the mechanism of photocatalytic hydrogenation by Zn(O,S) embedded in the PEO (PZOS) nanofiber involves a total of six electrons (e-) and six protons (H+) to hydrogenate nitrobenzene to nitrosobenzene, phenylhydroxylamine, and aniline.
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Affiliation(s)
- Elvri Melliaty Sitinjak
- Department
of Chemical Engineering, Politeknik Teknologi
Kimia Industri, Medan 20228, Indonesia
| | - Indra Masmur
- Department
of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Medan 20155, Indonesia
| | - Poltak Evencus Hutajulu
- Department
of Palm Oil Agribusiness, Politeknik Teknologi
Kimia Industri, Medan 20228, Indonesia
| | | | - Golfrid Gultom
- Department
of Mechanical Engineering, Politeknik Teknologi
Kimia Industri, Medan 20228, Indonesia
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Mousa HM, Sayed MM, Mohamed IMA, El-sadek MSA, Nasr EA, Mohamed MA, Taha M. Engineering of Multifunctional Nanocomposite Membranes for Wastewater Treatment: Oil/Water Separation and Dye Degradation. MEMBRANES 2023; 13:810. [PMID: 37887982 PMCID: PMC10608485 DOI: 10.3390/membranes13100810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 09/22/2023] [Accepted: 09/23/2023] [Indexed: 10/28/2023]
Abstract
Multifunctional membrane technology has gained tremendous attention in wastewater treatment, including oil/water separation and photocatalytic activity. In the present study, a multifunctional composite nanofiber membrane is capable of removing dyes and separating oil from wastewater, as well as having antibacterial activity. The composite nanofiber membrane is composed of cellulose acetate (CA) filled with zinc oxide nanoparticles (ZnO NPs) in a polymer matrix and dipped into a solution of titanium dioxide nanoparticles (TiO2 NPs). Membrane characterization was performed using transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), and Fourier transform infrared (FTIR), and water contact angle (WCA) studies were utilized to evaluate the introduced membranes. Results showed that membranes have adequate wettability for the separation process and antibacterial activity, which is beneficial for water disinfection from living organisms. A remarkable result of the membranes' analysis was that methylene blue (MB) dye removal occurred through the photocatalysis process with an efficiency of ~20%. Additionally, it exhibits a high separation efficiency of 45% for removing oil from a mixture of oil-water and water flux of 20.7 L.m-2 h-1 after 1 h. The developed membranes have multifunctional properties and are expected to provide numerous merits for treating complex wastewater.
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Affiliation(s)
- Hamouda M Mousa
- Mechanical Engineering Department, Faculty of Engineering, South Valley University, Qena 83523, Egypt
- Faculty of Technological Industry and Energy, Thebes Technological University, Thebes, Luxor 85863, Egypt
| | - Mostafa M. Sayed
- Department of Mechanical Design and Materials, Faculty of Energy Engineering, Aswan University, Aswan 81542, Egypt
| | | | - M. S. Abd El-sadek
- Nanomaterials Lab., Physics Department, Faculty of Science, South Valley University, Qena 83523, Egypt;
- Physics Department, Faculty of Science, Galala University, Galala, Suez 43511, Egypt
| | - Emad Abouel Nasr
- Department of Industrial Engineering, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;
| | - Mohamed A. Mohamed
- School of Engineering, University of South Wales, Pontypridd CF37 1DL, UK;
| | - Mohamed Taha
- Mechanical Engineering Department, College of Engineering and Technology, Arab Academy for Science, Technology and Maritime Transport, Sadat Road, Aswan 81511, Egypt;
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Anzar N, Suleman S, Bano H, Parvez S, Khanuja M, Pilloton R, Narang J. Paper-Based Electrodes Decorated with Silver and Zinc Oxide Nanocomposite for Electro-Chemical Sensing of Methamphetamine. SENSORS (BASEL, SWITZERLAND) 2023; 23:5519. [PMID: 37420685 DOI: 10.3390/s23125519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 07/09/2023]
Abstract
We present the development of an electrochemical paper-based analytical device (ePAD) for the detection of methamphetamine. Methamphetamine is a stimulant that young people use as an addictive narcotic, and it must be detected quickly since it may be hazardous. The suggested ePAD has the advantages of being simple, affordable, and recyclable. This ePAD was developed by immobilizing a methamphetamine-binding aptamer onto Ag-ZnO nanocomposite electrodes. The Ag-ZnO nanocomposites were synthesized via a chemical method and were further characterized via scanning electron microscopy, Fourier transform infrared spectroscopy, and UV-vis spectrometry in terms of their size, shape, and colloidal activity. The developed sensor showed a limit of detection of about 0.1 μg/mL, with an optimum response time of about 25 s, and its extensive linear range was between 0.01 and 6 μg/mL. The application of the sensor was recognized by spiking different beverages with methamphetamine. The developed sensor has a shelf life of about 30 days. This cost-effective and portable platform might prove to be highly successful in forensic diagnostic applications and will benefit those who cannot afford expensive medical tests.
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Affiliation(s)
- Nigar Anzar
- Department of Biotechnology, School of Chemical and Life Science, Jamia Hamdard University, New Delhi 110062, India
| | - Shariq Suleman
- Department of Biotechnology, School of Chemical and Life Science, Jamia Hamdard University, New Delhi 110062, India
| | - Husnara Bano
- Department of Biochemistry, School of Chemical and Life Science, Jamia Hamdard University, New Delhi 110062, India
| | - Suhel Parvez
- Department of Toxicology, School of Chemical and Life science, Jamia Hamdard University, New Delhi 110062, India
| | - Manika Khanuja
- Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi 110025, India
| | - Roberto Pilloton
- Institute of Crystallography, National Research Council (CNR-IC), 00015 Rome, Italy
| | - Jagriti Narang
- Department of Biotechnology, School of Chemical and Life Science, Jamia Hamdard University, New Delhi 110062, India
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Jessadaluk S, Khemasiri N, Kayunkid N, Rangkasikorn A, Wirunchit S, Tammarugwattana N, Mano K, Chananonnawathorn C, Horprathum M, Klamchuen A, Rahong S, Nukeaw J. Influence of Antimony Species on Electrical Properties of Sb-Doped Zinc Oxide Thin Films Prepared by Pulsed Laser Deposition. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13111799. [PMID: 37299702 DOI: 10.3390/nano13111799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 04/21/2023] [Accepted: 04/25/2023] [Indexed: 06/12/2023]
Abstract
This study systematically investigates the influence of antimony (Sb) species on the electrical properties of Sb-doped zinc oxide (SZO) thin films prepared by pulsed laser deposition in an oxygen-rich environment. The Sb species-related defects were controlled through a qualitative change in energy per atom by increasing the Sb content in the Sb2O3:ZnO-ablating target. By increasing the content of Sb2O3 (wt.%) in the target, Sb3+ became the dominant Sb ablation species in the plasma plume. Consequently, n-type conductivity was converted to p-type conductivity in the SZO thin films prepared using the ablating target containing 2 wt.% Sb2O3. The substituted Sb species in the Zn site (SbZn3+ and SbZn+) were responsible for forming n-type conductivity at low-level Sb doping. On the other hand, the Sb-Zn complex defects (SbZn-2VZn) contributed to the formation of p-type conductivity at high-level doping. The increase in Sb2O3 content in the ablating target, leading to a qualitative change in energy per Sb ion, offers a new pathway to achieve high-performing optoelectronics using ZnO-based p-n junctions.
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Affiliation(s)
- Sukittaya Jessadaluk
- King Mongkut's Institute of Technology Ladkrabang, College of Materials Innovation and Technology, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand
| | - Narathon Khemasiri
- Research Institute for Electronic Science, Hokkaido University N20 W10, Kita, Sapporo 001-0020, Japan
| | - Navaphun Kayunkid
- King Mongkut's Institute of Technology Ladkrabang, College of Materials Innovation and Technology, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand
- Thailand Center of Excellence in Physics, Commission on Higher Education, Ministry of Higher Education, Science, Research and Innovation, Bangkok 10400, Thailand
| | - Adirek Rangkasikorn
- King Mongkut's Institute of Technology Ladkrabang, College of Materials Innovation and Technology, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand
- Thailand Center of Excellence in Physics, Commission on Higher Education, Ministry of Higher Education, Science, Research and Innovation, Bangkok 10400, Thailand
| | - Supamas Wirunchit
- King Mongkut's Institute of Technology Ladkrabang, College of Materials Innovation and Technology, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand
- Thailand Center of Excellence in Physics, Commission on Higher Education, Ministry of Higher Education, Science, Research and Innovation, Bangkok 10400, Thailand
| | - Narin Tammarugwattana
- Department of Instrumentation and Control Engineering, School of Engineering, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand
| | - Kitipong Mano
- Department of Engineering Education, School of Industrial Education and Technology, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand
| | - Chanunthorn Chananonnawathorn
- Opto-Electrochemical Sensing Research Team, Spectroscopic and Sensing Devices Research Group, National Electronics and Computer Technology Center, Pathum Thani 12120, Thailand
| | - Mati Horprathum
- Opto-Electrochemical Sensing Research Team, Spectroscopic and Sensing Devices Research Group, National Electronics and Computer Technology Center, Pathum Thani 12120, Thailand
| | - Annop Klamchuen
- National Nanotechnology Center, National Science and Technology Development Agency, Pathum Thani 12120, Thailand
| | - Sakon Rahong
- King Mongkut's Institute of Technology Ladkrabang, College of Materials Innovation and Technology, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand
| | - Jiti Nukeaw
- King Mongkut's Institute of Technology Ladkrabang, College of Materials Innovation and Technology, Chalongkrung Rd., Ladkrabang, Bangkok 10520, Thailand
- Thailand Center of Excellence in Physics, Commission on Higher Education, Ministry of Higher Education, Science, Research and Innovation, Bangkok 10400, Thailand
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Antibacterial Activity of Solvothermal Obtained ZnO Nanoparticles with Different Morphology and Photocatalytic Activity against a Dye Mixture: Methylene Blue, Rhodamine B and Methyl Orange. Int J Mol Sci 2023; 24:ijms24065677. [PMID: 36982751 PMCID: PMC10058279 DOI: 10.3390/ijms24065677] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 03/09/2023] [Accepted: 03/14/2023] [Indexed: 03/18/2023] Open
Abstract
In this paper, we report the synthesis of ZnO nanoparticles (NPs) by forced solvolysis of Zn(CH3COO)2·2H2O in alcohols with a different number of –OH groups. We study the influence of alcohol type (n-butanol, ethylene glycol and glycerin) on the size, morphology, and properties of the obtained ZnO NPs. The smallest polyhedral ZnO NPs (<30 nm) were obtained in n-butanol, while in ethylene glycol the NPs measured on average 44 nm and were rounded. Polycrystalline particles of 120 nm were obtained in glycerin only after water refluxing. In addition, here, we report the photocatalytic activity, against a dye mixture, of three model pollutants: methyl orange (MO), methylene blue (MB), and rhodamine B (RhB), a model closer to real situations where water is polluted with many chemicals. All samples exhibited good photocatalytic activity against the dye mixture, with degradation efficiency reaching 99.99%. The sample with smallest nanoparticles maintained a high efficiency >90%, over five catalytic cycles. Antibacterial tests were conducted against Gram-negative strains Salmonella enterica serovar Typhimurium, Pseudomonas aeruginosa, and Escherichia coli, and Gram-positive strains Enterococcus faecalis, Bacillus subtilis, Staphylococcus aureus, and Bacillus cereus. The ZnO samples presented strong inhibition of planktonic growth for all tested strains, indicating that they can be used for antibacterial applications, such as water purification.
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Minaeian S, Khales P, Hosseini-Hosseinabad SM, Farahmand M, Poortahmasebi V, Habib Z, Tavakoli A. Evaluation of Activity of Zinc Oxide Nanoparticles on Human Rotavirus and Multi-Drug Resistant Acinetobacter Baumannii. Pharm Nanotechnol 2023; 11:475-485. [PMID: 37150981 DOI: 10.2174/2211738511666230504121506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 03/10/2023] [Accepted: 03/22/2023] [Indexed: 05/09/2023]
Abstract
BACKGROUND Rotaviruses are the cause of acute gastroenteritis and severe diarrheal diseases in children worldwide. Children under the age of five are more susceptible to rotavirus infections. Due to such as the lack of effective drugs and supportive therapy only, the development of new antiviral agents against rotaviruses is required. Multi-drug-resistant Acinetobacter baumannii is also one of the most challenging Gram-negative bacteria to control and treat due to its antibiotic resistance, particularly in intensive care units. OBJECTIVE This study aimed to investigate the activity of zinc oxide nanoparticles against human rotavirus and multi-drug resistant Acinetobacter baumannii. METHODS The standard 50% tissue culture infectious dose method and the real-time polymerase chain reaction assay were used to investigate the effects of zinc oxide nanoparticles on rotaviruses. The well diffusion and the minimum inhibitory concentration method were used to assess the antibacterial activity of zinc oxide nanoparticles against Acinetobacter baumannii. RESULTS 300 μg/ml of zinc oxide nanoparticles demonstrated the highest anti-rotavirus effects, resulting in a 3.16 logarithmic decrease in virus infectious titer, and a four-unit increase in the cycle threshold value of the real-time polymerase chain reaction assay compared to the untreated control (P value <0.001 and P value = 0.005, respectively). The diameter of the inhibition zone of zinc oxide nanoparticles solution against Acinetobacter baumannii was 17 mm. The minimum inhibitory concentration results of the zinc oxide nanoparticles solution against Acinetobacter baumannii was 1.56 mg/ml. CONCLUSION Our findings showed that zinc oxide nanoparticles could be considered a promising antimicrobial compound.
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Affiliation(s)
- Sara Minaeian
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Pegah Khales
- Department of Bacteriology and Virology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | | | - Mohammad Farahmand
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Vahdat Poortahmasebi
- Infectious and Tropical Disease Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Bacteriology and Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zahra Habib
- Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ahmad Tavakoli
- Research Center of Pediatric Infectious Diseases, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
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10
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Motelica L, Vasile BS, Ficai A, Surdu AV, Ficai D, Oprea OC, Andronescu E, Jinga DC, Holban AM. Influence of the Alcohols on the ZnO Synthesis and Its Properties: The Photocatalytic and Antimicrobial Activities. Pharmaceutics 2022; 14:2842. [PMID: 36559334 PMCID: PMC9783502 DOI: 10.3390/pharmaceutics14122842] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022] Open
Abstract
Zinc oxide (ZnO) nanomaterials are used in various health-related applications, from antimicrobial textiles to wound dressing composites and from sunscreens to antimicrobial packaging. Purity, surface defects, size, and morphology of the nanoparticles are the main factors that influence the antimicrobial properties. In this study, we are comparing the properties of the ZnO nanoparticles obtained by solvolysis using a series of alcohols: primary from methanol to 1-hexanol, secondary (2-propanol and 2-butanol), and tertiary (tert-butanol). While the synthesis of ZnO nanoparticles is successfully accomplished in all primary alcohols, the use of secondary or tertiary alcohols does not lead to ZnO as final product, underlining the importance of the used solvent. The shape of the obtained nanoparticles depends on the alcohol used, from quasi-spherical to rods, and consequently, different properties are reported, including photocatalytic and antimicrobial activities. In the photocatalytic study, the ZnO obtained in 1-butanol exhibited the best performance against methylene blue (MB) dye solution, attaining a degradation efficiency of 98.24%. The comparative study among a series of usual model dyes revealed that triarylmethane dyes are less susceptible to photo-degradation. The obtained ZnO nanoparticles present a strong antimicrobial activity on a broad range of microorganisms (bacterial and fungal strains), the size and shape being the important factors. This permits further tailoring for use in medical applications.
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Affiliation(s)
- Ludmila Motelica
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Research Center for Food Safety, University Politehnica of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania
| | - Bogdan-Stefan Vasile
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Research Center for Food Safety, University Politehnica of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Polizu St., 011061 Bucharest, Romania
| | - Anton Ficai
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Research Center for Food Safety, University Politehnica of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Polizu St., 011061 Bucharest, Romania
- Academy of Romanian Scientists, Ilfov Street 3, 050044 Bucharest, Romania
| | - Adrian-Vasile Surdu
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Research Center for Food Safety, University Politehnica of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Polizu St., 011061 Bucharest, Romania
| | - Denisa Ficai
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Research Center for Food Safety, University Politehnica of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Polizu St., 011061 Bucharest, Romania
| | - Ovidiu-Cristian Oprea
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Research Center for Food Safety, University Politehnica of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Polizu St., 011061 Bucharest, Romania
- Academy of Romanian Scientists, Ilfov Street 3, 050044 Bucharest, Romania
| | - Ecaterina Andronescu
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- National Research Center for Food Safety, University Politehnica of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Polizu St., 011061 Bucharest, Romania
- Academy of Romanian Scientists, Ilfov Street 3, 050044 Bucharest, Romania
| | - Dan Corneliu Jinga
- Department of Medical Oncology, Neolife Medical Center, Ficusului Bd. 40, 077190 Bucharest, Romania
| | - Alina Maria Holban
- Microbiology and Immunology Department, Faculty of Biology, University of Bucharest, 077206 Bucharest, Romania
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11
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Kim T, Cho W, Kim B, Yeom J, Kwon YM, Baik JM, Kim JJ, Shin H. Batch Nanofabrication of Suspended Single 1D Nanoheaters for Ultralow-Power Metal Oxide Semiconductor-Based Gas Sensors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204078. [PMID: 36180411 DOI: 10.1002/smll.202204078] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 09/05/2022] [Indexed: 06/16/2023]
Abstract
The demand for power-efficient micro-and nanodevices is increasing rapidly. In this regard, electrothermal nanowire-based heaters are promising solutions for the ultralow-power devices required in IoT applications. Herein, a method is demonstrated for producing a 1D nanoheater by selectively coating a suspended pyrolyzed carbon nanowire backbone with a thin Au resistive heater layer and utilizing it in a portable gas sensor system. This sophisticated nanostructure is developed without complex nanofabrication and nanoscale alignment processes, owing to the suspended architecture and built-in shadow mask. The suspended carbon nanowires, which are batch-fabricated using carbon-microelectromechanical systems technology, maintain their structural and functional integrity in subsequent nanopatterning processes because of their excellent mechanical robustness. The developed nanoheater is used in gas sensors via user-designable localization of the metal oxide semiconductor nanomaterials onto the central region of the nanoheater at the desired temperature. This allows the sensing site to be uniformly heated, enabling reliable and sensitive gas detection. The 1D nanoheater embedded gas sensor can be heated immediately to 250 °C at a remarkably low power of 1.6 mW, surpassing the performance of state-of-the-art microheater-based gas sensors. The presented technology offers facile 1D nanoheater production and promising pathways for applications in various electrothermal devices.
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Affiliation(s)
- Taejung Kim
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Wootaek Cho
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Beomsang Kim
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Junyeong Yeom
- Department of Electrical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Yeong Min Kwon
- Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jeong Min Baik
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Jae Joon Kim
- Department of Electrical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Heungjoo Shin
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
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12
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Zadorozhnaya LA, Tarasov AP, Volchkov IS, Muslimov AE, Kanevsky VM. Morphology and Luminescence of Flexible Free-Standing ZnO/Zn Composite Films Grown by Vapor Transport Synthesis. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8165. [PMID: 36431649 PMCID: PMC9697492 DOI: 10.3390/ma15228165] [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: 10/21/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
A method for fabricating flexible free-standing ZnO/Zn composite films from the vapor phase using a regular array of silicon microwhiskers as a substrate is presented. The structural and morphological peculiarities, as well as luminescent properties of the films, were studied. The films have a hybrid structure consisting of two main microlayers. The first layer is formed directly on the tops of Si whiskers and has a thickness up to 10 µm. This layer features a polycrystalline structure and well-developed surface morphology. The second layer, which makes up the front side of the films, is up to 100 µm thick and consists of large microcrystals. The films show good bending strength-in particular, resistance to repeated bending and twisting-which is provided by a zinc metallic part constituting the flexible carrier of the films. ZnO photoluminescence was observed from both surfaces of the films but with conspicuous spectral differences. In particular, a significant weakening of ZnO green luminescence (more than 10 times) at an almost constant intensity of UV near-band edge emission was found for the polycrystalline side of the films as compared to the microcrystalline side. A high degree of homogeneity of the luminescent properties of the films over their area was demonstrated. The results obtained emphasize the relevance of further studies of such ZnO structures-in particular, for application in flexible devices, sensors, photocatalysis and light generation.
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Affiliation(s)
- Ludmila A. Zadorozhnaya
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Moscow, Russia
| | - Andrey P. Tarasov
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Moscow, Russia
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13
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Navarro-López DE, Sánchez-Huerta TM, Flores-Jimenez MS, Tiwari N, Sanchez-Martinez A, Ceballos-Sanchez O, Garcia-Gonzalez A, Fuentes-Aguilar RQ, Sanchez-Ante G, Corona-Romero K, Rincón-Enríquez G, López-Mena ER. Nanocomposites based on doped ZnO nanoparticles for antibacterial applications. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Aloe barbadensis Mill leaf gel assisted combustion synthesized ZnO:Ni3+: Electrochemical sensor for Ascorbic Acid detection and Photocatalysis. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Gao W, Wang T, Xu J, Zeng P, Zhang W, Yao Y, Chen C, Li M, Yu SF. Robust and Flexible Random Lasers Using Perovskite Quantum Dots Coated Nickel Foam for Speckle-Free Laser Imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2103065. [PMID: 34410038 DOI: 10.1002/smll.202103065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Indexed: 06/13/2023]
Abstract
The advantage of using flexible metallic structures as the substrate of flexible lasers over plastic materials is its strong mechanical strength and high thermal conductivity. Here, it is proposed to deposit CsPbBr3 perovskite quantum dots onto Ni porous foam for the realization of flexible lasers. Under two-photon 800 nm excitation at room temperature, incoherent random lasing emission is observed at ≈537 nm. By external deformation of the Ni porous foam, incoherent random lasing can be tuned to amplified spontaneous emission as well as the corresponding lasing threshold be controlled. More importantly, it is demonstrated that the laser is robust to intensive bending (>1000 bending cycles) with minimum effect on the lasing intensity. This flexible laser is also shown to be an ideal light source to produce a "speckle" free micro-image.
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Affiliation(s)
- Wei Gao
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
- Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen, 518060, China
| | - Ting Wang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China
| | - Jiangtao Xu
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Ping Zeng
- State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Wenfei Zhang
- Shenzhen Key Laboratory of Laser Engineering, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Yunduo Yao
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Changsheng Chen
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Mingjie Li
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Siu Fung Yu
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
- Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen, 518060, China
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16
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Hlil AR, Thomas J, Garcia-Puente Y, Boisvert JS, Lima BC, Rakotonandrasana A, Maia LJQ, Tehranchi A, Loranger S, Gomes ASL, Messaddeq Y, Kashyap R. Structural and optical properties of Nd:YAB-nanoparticle-doped PDMS elastomers for random lasers. Sci Rep 2021; 11:16803. [PMID: 34413334 PMCID: PMC8377032 DOI: 10.1038/s41598-021-95921-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 07/26/2021] [Indexed: 11/08/2022] Open
Abstract
We report the structural and optical properties of Nd:YAB (NdxY1-x Al3(BO3)4)-nanoparticle-doped PDMS elastomer films for random lasing (RL) applications. Nanoparticles with Nd ratios of x = 0.2, 0.4, 0.6, 0.8, and 1.0 were prepared and then incorporated into the PDMS elastomer to control the optical gain density and scattering center content over a wide range. The morphology and thermal stability of the elastomer composites were studied. A systematic investigation of the lasing wavelength, threshold, and linewidth of the laser was carried out by tailoring the concentration and optical gain of the scattering centers. The minimum threshold and linewidth were found to be 0.13 mJ and 0.8 nm for x = 1 and 0.8. Furthermore, we demonstrated that the RL intensity was easily tuned by controlling the degree of mechanical stretching, with strain reaching up to 300%. A strong, repeatable lasing spectrum over ~ 50 cycles of applied strain was observed, which demonstrates the high reproducibility and robustness of the RL. In consideration for biomedical applications that require long-term RL stability, we studied the intensity fluctuation of the RL emission, and confirmed that it followed Lévy-like statistics. Our work highlights the importance of using rare-earth doped nanoparticles with polymers for RL applications.
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Affiliation(s)
- Antsar R Hlil
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada.
- Département de Chimie, Faculté des Sciences et de Génie Pavillon Alexmoura Vachon, Université Laval, 1045, avenue de la Médecine, Quebec, G1V 0A6, Canada.
- Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Quebec, QC, G1V 0A6, Canada.
| | - Jyothis Thomas
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Yalina Garcia-Puente
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Jean-Sebastien Boisvert
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Bismarck C Lima
- Center for Telecommunications Studies, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ando Rakotonandrasana
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Lauro J Q Maia
- Grupo Física de Materiais, Instituto de Física, Universidade Federal de Goiás-UFG, Campus II, Av.Esperança 1533, Goiânia, GO, 74690-900, Brazil
| | - Amirhossein Tehranchi
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Sebastien Loranger
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada
| | - Anderson S L Gomes
- Departamento de Física, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Younes Messaddeq
- Département de Chimie, Faculté des Sciences et de Génie Pavillon Alexmoura Vachon, Université Laval, 1045, avenue de la Médecine, Quebec, G1V 0A6, Canada
- Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Quebec, QC, G1V 0A6, Canada
| | - Raman Kashyap
- Fabulas Laboratory, Department of Engineering Physics, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada.
- Centre d'Optique, Photonique et Laser, Université Laval, 2375 Rue de la Terrasse, Quebec, QC, G1V 0A6, Canada.
- Fabulas Laboratory, Department of Electrical Engineering, École Polytechnique Montréal, Station Centre-ville, P.O Box 6079, Montreal, QC, H3C 3A7, Canada.
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17
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Rashidi M, Haggren T, Su Z, Jagadish C, Mokkapati S, Tan HH. Managing Resonant and Nonresonant Lasing Modes in GaAs Nanowire Random Lasers. NANO LETTERS 2021; 21:3901-3907. [PMID: 33900783 DOI: 10.1021/acs.nanolett.1c00455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Random lasers are promising, easy-to-fabricate light sources that rely on scattering instead of well-defined optical cavities. We demonstrate random lasing in GaAs nanowires using both randomly oriented and vertically aligned arrays. These configurations are shown to lase in both resonant and nonresonant modes, where aligned nanowires support predominantly resonant lasing and randomly oriented favors nonresonant lasing. On the basis of numerical simulations, aligning the nanowires increases the system's scattering efficiency leading to higher quality factor modes and thus favoring the resonant modes. We further demonstrate two methods to optically suppress resonant mode lasing by increasing the number of excited modes. The light output-light input curves show a pronounced kink for the resonant lasing mode while the nonresonant mode is kink-free. The resonant lasing modes may be used as tunable lasers, and the nonresonant modes exhibit near-thresholdless amplification. Switching between lasing modes opens up new opportunities to use lasers in broader applications.
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Affiliation(s)
- Mohammad Rashidi
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Tuomas Haggren
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Zhicheng Su
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Chennupati Jagadish
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
- Australian Research Council Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Sudha Mokkapati
- Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Hark H Tan
- Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
- Australian Research Council Centre of Excellence for Transformative Meta-Optical Systems, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
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18
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Panigrahi UK, Sahu B, Behuria HG, Sahu SK, Dhal SP, Hussain S, Mallick P. Synthesis, characterization and bioactivity of thio-acetamide modified ZnO nanoparticles embedded in zinc acetate matrix. NANO EXPRESS 2021. [DOI: 10.1088/2632-959x/abdad8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
ZnO nanoparticles embedded in zinc acetate matrix were synthesized by chemical route. The effect of thio-acetamide concentration during its synthesis was probed by structural, morphological, optical and bioactivity studies. XRD characterization indicated the formation of dominant phase of zinc acetate along with the low intensity peak of wurtzite ZnO. Morphological transition from bulky-like feature to flower-like feature via flake-like feature, is evidenced with increasing thio-acetamide molar concentrations. The optical band gap of samples decreased from ∼3.29 to 3.24 eV whereas the emitted color shifted from near green to blue region with increasing of molar concentration of thio-acetamide from 0 to 30% in the sample. The nanoparticles exhibited antimicrobial activity against seven (7) common human pathogenic bacteria including drug resistant varieties K. pneumonaie and S. aureus. The nanoparticles formed pores in the biological model membranes made from egg-phosphatidyl choline. Our study reveals that the thio-acetamide modified ZnO nanoparticles embedded in zinc acetate matrix could be used as potential drug lead to fight drug resistance against K. pneumoniae and S. aureus.
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19
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Su CY, Hou CF, Hsu YT, Lin HY, Liao YM, Lin TY, Chen YF. Multifunctional Random-Laser Smart Inks. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49122-49129. [PMID: 33058666 DOI: 10.1021/acsami.0c14875] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
With the superiority of laser-level intensity, narrow spectral line width, and broad-angular emission, random lasers (RLs) have drawn considerable research interests for their potential to carry out a variety of applications. In this work, the applications associated with optical-encoded technologies, including security printing, military friend or foe identification (FFI), and anticounterfeiting of documents are highlighted, and the concept of a transient RL "smart ink" has been proposed. The proof-of-concept was demonstrated as invisible signatures, which encoded the messages through the spectral difference of spontaneous emission and RL under specified conditions. Next, the possibility of encoding the data with multibit signals was further confirmed by exploiting the threshold tunability of RLs. Moreover, the transient characteristic of this smart ink and its capability to be attached on freeform surfaces of different materials were also shown. With the advantages of a facile manufacturing process and multiple purposes, it is expected that this ink can soon be carried out in a variety of practical utilities.
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Affiliation(s)
- Chen-You Su
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Cheng-Fu Hou
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Yun-Tzu Hsu
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Hsia-Yu Lin
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Ming Liao
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Tai-Yuan Lin
- Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 202, Taiwan
| | - Yang-Fang Chen
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
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