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Dieulesaint A, Chaix-Pluchery O, Weber M, Donatini F, Lacoste A, Consonni V, Sarigiannidou E. Tunable Hydrogen-Related Defects in ZnO Nanowires Using Oxygen Plasma Treatment by Ion Energy Adjustment. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1225. [PMID: 39057901 PMCID: PMC11279584 DOI: 10.3390/nano14141225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 07/28/2024]
Abstract
The chemical bath deposition (CBD) process enables the deposition of ZnO nanowires (NWs) on various substrates with customizable morphology. However, the hydrogen-rich CBD environment introduces numerous hydrogen-related defects, unintentionally doping the ZnO NWs and increasing their electrical conductivity. The oxygen-based plasma treatment can modify the nature and amount of these defects, potentially tailoring the ZnO NW properties for specific applications. This study examines the impact of the average ion energy on the formation of oxygen vacancies (VO) and hydrogen-related defects in ZnO NWs exposed to low-pressure oxygen plasma. Using X-ray photoelectron spectroscopy (XPS), 5 K cathodoluminescence (5K CL), and Raman spectroscopy, a comprehensive understanding of the effect of the oxygen ion energy on the formation of defects and defect complexes was established. A series of associative and dissociative reactions indicated that controlling plasma process parameters, particularly ion energy, is crucial. The XPS data suggested that increasing the ion energy could enhance Fermi level pinning by increasing the amount of VO and favoring the hydroxyl group adsorption, expanding the depletion region of charge carriers. The 5K CL and Raman spectroscopy further demonstrated the potential to adjust the ZnO NW physical properties by varying the oxygen ion energy, affecting various donor- and acceptor-type defect complexes. This study highlights the ability to tune the ZnO NW properties at low temperature by modifying plasma process parameters, offering new possibilities for a wide variety of nanoscale engineering devices fabricated on flexible and/or transparent substrates.
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Affiliation(s)
| | | | - Matthieu Weber
- Université Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France
| | - Fabrice Donatini
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL, F-38000 Grenoble, France;
| | - Ana Lacoste
- Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, F-38000 Grenoble, France;
| | - Vincent Consonni
- Université Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France
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2
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AlAbdulaal T, AlShadidi M, Hussien M, Ganesh V, Bouzidi AF, Rafique S, Algarni H, Zahran H, Abdel-Wahab M, Yahia I. Multifunctional and smart Er 2O 3-ZnO nanocomposites for electronic ceramic varistors and visible light degradation of wastewater treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:19109-19131. [PMID: 34713401 DOI: 10.1007/s11356-021-16754-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
In this proposed study, erbium (Er3+)-doped ZnO nanocomposites were prepared through the effective, basic, and green combustion method. The significant effects of Er dopants on the structural, morphological features, dielectric, and optical behaviors of the pure ZnO matrix as well as Er2O3-ZnO nanostructured materials were investigated applying X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transformation infrared (FT-IR) spectroscopy, and UV-Vis spectrophotometer techniques. These results showed that the synthesized Er2O3-ZnO nanocomposites are well polycrystalline. The Er2O3-ZnO nanocomposites are almost uniformly distributed on the surface morphologies. Furthermore, UV-Vis diffuse reflectance spectroscopy, AC electrical conductivity, and dielectric properties' current-voltage characteristics were utilized to examine the influence of erbium doping on the optical properties, energy bandgaps of the proposed Er2O3-ZnO nanostructured powder. The tested nano-samples were applied for the visible light photodegradation of p-chlorophenol(4-CP) and p-nitrophenol (4-NP). The Er-doped ZnO ratio affects the photocatalytic activity of the ZnO matrix. This current research substantiated that more than 99.5% of 4-CP and 4-NP were photodegraded through 30 min of irradiation. Four times, the Er:ZnO nanocatalysts were used and still displayed an efficiency of more than 96.5% for 4-CP and 4-NP degradations in the specified period of 30 min. The as-prepared Er2O3-ZnO nanostructures are considered novel potential candidates in broad nano-applications from visible photocatalytic degradation of waste pollutants to the electronic varistor devices.
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Affiliation(s)
- Thekrayat AlAbdulaal
- Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia.
| | - Manal AlShadidi
- Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
| | - Mai Hussien
- Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt
- Nanoscience Laboratory for Environmental and Bio-medical Applications (NLEBA), Semiconductor Lab., Metallurgical Lab.1. Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt
| | - Vanga Ganesh
- Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
| | - Abdel-Fatah Bouzidi
- Research Unit, Physics of Insulating and Semi-insulating Materials, Faculty of Sciences, University of Sfax, B.P.1171, 3000, Sfax, Tunisia
| | - Saqib Rafique
- Multidisciplinary Nanotechnology Centre, College of Engineering, Swansea University, Swansea, SA1 8EN, United Kingdom
| | - Hamed Algarni
- Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
| | - Heba Zahran
- Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
- Nanoscience Laboratory for Environmental and Bio-medical Applications (NLEBA), Semiconductor Lab., Metallurgical Lab.1. Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt
| | - Mohamed Abdel-Wahab
- Center of Nanotechnology, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Ibrahim Yahia
- Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
- Nanoscience Laboratory for Environmental and Bio-medical Applications (NLEBA), Semiconductor Lab., Metallurgical Lab.1. Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
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3
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Saha D, Negi DPS. Particle size enlargement and 6-fold fluorescence enhancement of colloidal CdS quantum dots induced by selenious acid. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 225:117486. [PMID: 31491615 DOI: 10.1016/j.saa.2019.117486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/31/2019] [Accepted: 08/24/2019] [Indexed: 06/10/2023]
Abstract
Herein, colloidal CdS QDs have been synthesized by using cysteine as a stabilizing agent. The interaction between the CdS QDs and selenious acid was monitored by using UV-visible, fluorescence and Fourier transform infrared (FTIR) spectroscopy. The onset of absorption of the CdS QDs (430 nm) was progressively red-shifted upon increase in the concentration of selenious acid at pH 10. It indicated enlargement of the particle size which was confirmed by the dynamic light scattering (DLS) measurements. Interestingly, the addition of 100 μM selenious acid at pH 6 resulted in a 6-fold enhancement of the red emission (λmax = 617 nm) of the CdS QDs. The particle size enlargement of CdS was due to an electrostatic interaction between selenious acid and QD stabilizer cysteine. The 6-fold fluorescence enhancement was of the CdS QDs was explained on the basis of hydrogen-bonding interaction between selenious acid and cysteine. The fluorescence-based method was applied for the sensing of selenious acid at pH 6.
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Affiliation(s)
- Dipika Saha
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Devendra P S Negi
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India.
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Packirisamy RG, Govindasamy C, Sanmugam A, Venkatesan S, Kim HS, Vikraman D. Synthesis of novel Sn1-xZnxO-chitosan nanocomposites: Structural, morphological and luminescence properties and investigation of antibacterial properties. Int J Biol Macromol 2019; 138:546-555. [DOI: 10.1016/j.ijbiomac.2019.07.120] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 04/19/2019] [Accepted: 07/19/2019] [Indexed: 11/26/2022]
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Deka Boruah B. Zinc oxide ultraviolet photodetectors: rapid progress from conventional to self-powered photodetectors. NANOSCALE ADVANCES 2019; 1:2059-2085. [PMID: 36131964 PMCID: PMC9416854 DOI: 10.1039/c9na00130a] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 03/28/2019] [Indexed: 05/14/2023]
Abstract
Currently, the development of ultraviolet (UV) photodetectors (PDs) has attracted the attention of the research community because of the vast range of applications of photodetectors in modern society. A variety of wide-band gap nanomaterials have been utilized for UV detection to achieve higher photosensitivity. Specifically, zinc oxide (ZnO) nanomaterials have attracted significant attention primarily due to their additional properties such as piezo-phototronic and pyro-phototronic effects, which allow the fabrication of high-performance and low power consumption-based UV PDs. This article primarily focuses on the recent development of ZnO nanostructure-based UV PDs ranging from nanomaterials to architectural device design. A brief overview of the photoresponse characteristics of UV PDs and potential ZnO nanostructures is presented. Moreover, the recent development in self-powered PDs and implementation of the piezo-phototronic effect, plasmonic effect and pyro-phototronic effect for performance enhancement is highlighted. Finally, the research perspectives and future research direction related to ZnO nanostructures for next-generation UV PDs are summarized.
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Affiliation(s)
- Buddha Deka Boruah
- Institute for Manufacturing, Department of Engineering, University of Cambridge UK CB3 0FS
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6
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Enhanced photocatalytic activity of Ag-ZnO nanoparticles synthesized by using Padina gymnospora seaweed extract. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.073] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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7
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Cannas M, Camarda P, Vaccaro L, Amato F, Messina F, Fiore T, Li Vigni M. Enhancing the luminescence efficiency of silicon-nanocrystals by interaction with H + ions. Phys Chem Chem Phys 2018; 20:10445-10449. [PMID: 29616694 DOI: 10.1039/c8cp00616d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The emission of silicon nanocrystals (Si-NCs), synthesized by pulsed laser ablation in water, was investigated on varying the pH of the solution. These samples emit μs decaying orange photoluminescence (PL) associated with radiative recombination of quantum-confined excitons. Time-resolved spectra reveal that both the PL intensity and the lifetime increase by a factor of ∼20 when the pH decreases from 10 to 1 thus indicating that the emission quantum efficiency increases by inhibiting nonradiative decay rates. Infrared (IR) absorption and electron paramagnetic resonance (EPR) experiments allow addressing the origin of defects on which the excitons nonradiatively recombine. The linear correlation between the PL and the growth of SiH groups demonstrates that H+ ions passivate the nonradiative defects that are located in the interlayer between the Si-NC core and the amorphous SiO2 shell.
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Affiliation(s)
- Marco Cannas
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Via Archirafi 36, I-90123 Palermo, Italy.
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Sharma A, Kumar Y, Mazumder K, Rana AK, Shirage PM. Controlled Zn1−xNixO nanostructures for an excellent humidity sensor and a plausible sensing mechanism. NEW J CHEM 2018. [DOI: 10.1039/c7nj04801g] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A Freundlich adsorption isotherm model confirms a plausible humidity sensing mechanism when using wet chemically prepared Zn1−xNixO nanostructures.
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Affiliation(s)
- Alfa Sharma
- Discipline of Metallurgy Engineering & Materials Science, Indian Institute of Technology Indore
- Indore-453552
- India
| | - Yogendra Kumar
- Discipline of Metallurgy Engineering & Materials Science, Indian Institute of Technology Indore
- Indore-453552
- India
| | - Kushal Mazumder
- Discipline of Physics, Indian Institute of Technology Indore
- Indore-453552
- India
| | - Amit Kumar Rana
- Discipline of Physics, Indian Institute of Technology Indore
- Indore-453552
- India
| | - Parasharam M. Shirage
- Discipline of Metallurgy Engineering & Materials Science, Indian Institute of Technology Indore
- Indore-453552
- India
- Discipline of Physics, Indian Institute of Technology Indore
- Indore-453552
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9
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Liu X, Tong Y, Wang A, Xuan X. Synthesis, structural characterization, thermal stability, vibrational spectra and density functional theoretical studies of 1,3-bis(carboxymethyl)imidazolium nitrate ionic liquid. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.09.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Abstract
Inkjet printing is a powerful and cost-effective technique for deposition of liquid inks with high accuracy, which is not only of great significance for graphic applications but also has enormous potential for the direct printing of optoelectronic devices. This review highlights a comprehensive overview of the progress that has been made in optoelectronics fabrication by the inkjet printing technique. The first part briefly covers the droplet-generation process in the nozzles of printheads and the physical properties affecting droplet formation and the profiles of the printed patterns. The second section outlines the recent activities related to applications of inkjet printing in optoelectronics fabrication including solar cells, light-emitting diodes, photodetectors and transparent electrodes. In each application field, the challenges with the inkjet printing process and the possible solutions are discussed before a few remarks. In the last section, a brief summary on the progress of inkjet printing fabrication of optoelectronics and an outlook for future research effort are presented.
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Affiliation(s)
- Zhaoyao Zhan
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Ave, 639798, Singapore.
| | - Jianing An
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Ave, 639798, Singapore.
| | - Yuefan Wei
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Ave, 639798, Singapore.
| | - Van Thai Tran
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Ave, 639798, Singapore.
| | - Hejun Du
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Ave, 639798, Singapore.
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11
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Zhang C, Huang X, Liu H, Chua SJ, Ross CA. Large-area zinc oxide nanorod arrays templated by nanoimprint lithography: control of morphologies and optical properties. NANOTECHNOLOGY 2016; 27:485604. [PMID: 27811408 DOI: 10.1088/0957-4484/27/48/485604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Vertically aligned, highly ordered, large area arrays of nanostructures are important building blocks for multifunctional devices. Here, ZnO nanorod arrays are selectively synthesized on Si substrates by a solution method within patterns created by nanoimprint lithography. The growth modes of two dimensional nucleation-driven wedding cakes and screw dislocation-driven spirals are inferred to determine the top end morphologies of the nanorods. Sub-bandgap photoluminescence of the nanorods is greatly enhanced by the manipulation of the hydrogen donors via a post-growth thermal treatment. Lasing behavior is facilitated in the nanorods with faceted top ends formed from wedding cakes growth mode. This work demonstrates the control of morphologies of oxide nanostructures in a large scale and the optimization of the optical performance.
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Affiliation(s)
- Chen Zhang
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. Singapore-MIT Alliance, National University of Singapore, 4 Engineering Drive 3, 117576 Singapore
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12
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Tao Y, Li X, Han L, Zhang W, Liu Z. Spectroscopy (FT-IR, FT-Raman), hydrogen bonding, electrostatic potential and HOMO-LUMO analysis of tioxolone based on DFT calculations. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.05.077] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Huang X, Zhang L, Wang S, Chi D, Chua SJ. Solution-Grown ZnO Films toward Transparent and Smart Dual-Color Light-Emitting Diode. ACS APPLIED MATERIALS & INTERFACES 2016; 8:15482-15488. [PMID: 27213523 DOI: 10.1021/acsami.6b03868] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An individual light-emitting diode (LED) capable of emitting different colors of light under different bias conditions not only allows for compact device integration but also extends the functionality of the LED beyond traditional illumination and display. Herein, we report a color-switchable LED based on solution-grown n-type ZnO on p-GaN/n-GaN heterojunction. The LED emits red light with a peak centered at ∼692 nm and a full width at half-maximum of ∼90 nm under forward bias, while it emits green light under reverse bias. These two lighting colors can be switched repeatedly by reversing the bias polarity. The bias-polarity-switched dual-color LED enables independent control over the lighting color and brightness of each emission with two-terminal operation. The results offer a promising strategy toward transparent, miniaturized, and smart LEDs, which hold great potential in optoelectronics and optical communication.
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Affiliation(s)
- Xiaohu Huang
- Institute of Materials Research and Engineering , Agency for Science, Technology and Research, Singapore 138634, Singapore
| | - Li Zhang
- Singapore-MIT Alliance for Research and Technology , Singapore 138602, Singapore
| | - Shijie Wang
- Institute of Materials Research and Engineering , Agency for Science, Technology and Research, Singapore 138634, Singapore
| | - Dongzhi Chi
- Institute of Materials Research and Engineering , Agency for Science, Technology and Research, Singapore 138634, Singapore
| | - Soo Jin Chua
- Singapore-MIT Alliance for Research and Technology , Singapore 138602, Singapore
- Department of Electrical and Computer Engineering, National University of Singapore , Singapore 117576, Singapore
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14
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Yang D, Hernandez JA, Katiyar RS, Fonseca LF. Surface morphology-controlled fabrication of Na2WO4 films with high structural stability. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.04.071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Wang A, Zhao Y, Liu X, Chang L, Xuan X. 1,3-Bis(carboxymethyl)imidazolium bis(trifluoromethylsulfonyl)imide organic salt: Synthesis, single crystal structure, vibrational spectra, DFT calculations and physical-chemical properties. J Fluor Chem 2016. [DOI: 10.1016/j.jfluchem.2016.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Park JK, Kwon HJ, Lee CE. NMR Observation of Mobile Protons in Proton-Implanted ZnO Nanorods. Sci Rep 2016; 6:23378. [PMID: 26988733 PMCID: PMC4796899 DOI: 10.1038/srep23378] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 03/04/2016] [Indexed: 01/27/2023] Open
Abstract
The diffusion properties of H(+) in ZnO nanorods are investigated before and after 20 MeV proton beam irradiation by using (1)H nuclear magnetic resonance (NMR) spectroscopy. Herein, we unambiguously observe that the implanted protons occupy thermally unstable site of ZnO, giving rise to a narrow NMR line at 4.1 ppm. The activation barrier of the implanted protons was found to be 0.46 eV by means of the rotating-frame spin-lattice relaxation measurements, apparently being interstitial hydrogens. High-energy beam irradiation also leads to correlated jump diffusion of the surface hydroxyl group of multiple lines at ~1 ppm, implying the presence of structural disorder at the ZnO surface.
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Affiliation(s)
- Jun Kue Park
- Korea Multi-purpose Accelerator Complex, Korea Atomic Energy Research Institute, Gyeongju 38180, Korea.,Korea University of Science and Technology, Daejon 34113, Korea
| | - Hyeok-Jung Kwon
- Korea Multi-purpose Accelerator Complex, Korea Atomic Energy Research Institute, Gyeongju 38180, Korea.,Korea University of Science and Technology, Daejon 34113, Korea
| | - Cheol Eui Lee
- Department of Physics, Korea University, Seoul 02841, Korea
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Tao Y, Han L, Li X, Han Y, Liu Z. Molecular structure, spectroscopy (FT-IR, FT-Raman), thermodynamic parameters, molecular electrostatic potential and HOMO-LUMO analysis of 2, 6-dichlorobenzamide. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.12.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Xu L, Li X, Zhan Z, Wang L, Feng S, Chai X, Lu W, Shen J, Weng Z, Sun J. Catalyst-Free, Selective Growth of ZnO Nanowires on SiO2 by Chemical Vapor Deposition for Transfer-Free Fabrication of UV Photodetectors. ACS APPLIED MATERIALS & INTERFACES 2015; 7:20264-20271. [PMID: 26308593 DOI: 10.1021/acsami.5b05811] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Catalyst-free, selective growth of ZnO nanowires directly on the commonly used dielectric SiO2 layer is of both scientific significance and application importance, yet it is still a challenge. Here, we report a facile method to grow single-crystal ZnO nanowires on a large scale directly on SiO2/Si substrate through vapor-solid mechanism without using any predeposited metal catalyst or seed layer. We found that a rough SiO2/Si substrate surface created by the reactive ion etching is critical for ZnO growth without using catalyst. ZnO nanowire array exclusively grows in area etched by the reactive ion etching method. The advantages of this method include facile and safe roughness-assisted catalyst-free growth of ZnO nanowires on SiO2/Si substrate and the subsequent transfer-free fabrication of electronic or optoelectronic devices. The ZnO nanowire UV photodetector fabricated by a transfer-free process presented high performance in responsivity, quantum efficiency and response speed, even without any post-treatments. The strategy shown here would greatly reduce the complexity in nanodevice fabrication and give an impetus to the application of ZnO nanowires in nanoelectronics and optoelectronics.
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Affiliation(s)
- Liping Xu
- School of Electronics and Information Engineering, Changchun University of Science and Technology , 7089 Weixing Road, Changchun, Jilin 130022, People's Republic of China
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Xin Li
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Zhaoyao Zhan
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Liang Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Shuanglong Feng
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Xiangyu Chai
- School of Electronics and Information Engineering, Changchun University of Science and Technology , 7089 Weixing Road, Changchun, Jilin 130022, People's Republic of China
| | - Wenqiang Lu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Jun Shen
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing, 400714, People's Republic of China
- Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences , Chongqing 400714, People's Republic of China
| | - Zhankun Weng
- School of Electronics and Information Engineering, Changchun University of Science and Technology , 7089 Weixing Road, Changchun, Jilin 130022, People's Republic of China
| | - Jie Sun
- College of Electronic Information and Control Engineering, Beijing University of Technology , 100 Ping Le Yuan, Chaoyang District, Beijing 100124, People's Republic of China
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19
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Tao Y, Han L, Li X, Han Y, Liu Z. Conformational stability and vibrational study of phenylacetyl chloride. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3474] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yaping Tao
- College of Physics and Electronic Information; Luoyang Normal University; Luoyang 471022 China
| | - Ligang Han
- College of Physics and Electronic Information; Luoyang Normal University; Luoyang 471022 China
| | - Xiaofeng Li
- College of Physics and Electronic Information; Luoyang Normal University; Luoyang 471022 China
| | - Yunxia Han
- College of Physics and Electronic Information; Luoyang Normal University; Luoyang 471022 China
| | - Zhaojun Liu
- College of Physics and Electronic Information; Luoyang Normal University; Luoyang 471022 China
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Identification of intrinsic hydrogen impurities in ZnO with 1H solid-state nuclear magnetic resonance spectroscopy. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.03.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Li G, Wang H, Wang Q, Zhao Y, Wang Z, Du J, Ma Y. Structure and properties of Co-doped ZnO films prepared by thermal oxidization under a high magnetic field. NANOSCALE RESEARCH LETTERS 2015; 10:112. [PMID: 25852407 PMCID: PMC4385247 DOI: 10.1186/s11671-015-0834-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 02/19/2015] [Indexed: 05/29/2023]
Abstract
The effect of a high magnetic field applied during oxidation on the structure, optical transmittance, resistivity, and magnetism of cobalt (Co)-doped zinc oxide (ZnO) thin films prepared by oxidizing evaporated Zn/Co bilayer thin films in open air was studied. The relationship between the structure and properties of films oxidized with and without an applied magnetic field was analyzed. The results show that the high magnetic field obviously changed the structure and properties of the Co-doped ZnO films. The Lorentz force of the high magnetic field suppressed the oxidation growth on nanowhiskers. As a result, ZnO nanowires were formed without a magnetic field, whereas polyhedral particles formed under a 6 T magnetic field. This morphology variation from dendrite to polyhedron caused the transmittance below 1,200 nm of the film oxidized under a magnetic field of 6 T to be much lower than that of the film oxidized without a magnetic field. X-ray photoemission spectroscopy indicated that the high magnetic field suppressed Co substitution in the ZnO lattice, increased the concentration of oxygen vacancies, and changed the chemical state of Co. The increased concentration of oxygen vacancies affected the temperature dependence of the resistivity of the film oxidized under a magnetic field of 6 T compared with that of the film oxidized without a magnetic field. The changes of oxygen vacancy concentration and Co state caused by the application of the high magnetic field also increase the ferromagnetism of the film at room temperature. All of these results indicate that a high magnetic field is an effective tool to modify the structure and properties of ZnO thin films.
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Affiliation(s)
- Guojian Li
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, No 3-11, Wenhua road, Heping district Shenyang, 110819 China
| | - Huimin Wang
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, No 3-11, Wenhua road, Heping district Shenyang, 110819 China
| | - Qiang Wang
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, No 3-11, Wenhua road, Heping district Shenyang, 110819 China
| | - Yue Zhao
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, No 3-11, Wenhua road, Heping district Shenyang, 110819 China
| | - Zhen Wang
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, No 3-11, Wenhua road, Heping district Shenyang, 110819 China
| | - Jiaojiao Du
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, No 3-11, Wenhua road, Heping district Shenyang, 110819 China
| | - Yonghui Ma
- Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, No 3-11, Wenhua road, Heping district Shenyang, 110819 China
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22
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Juan YM, Chang SJ, Hsueh HT, Wang SH, Cheng TC, Huang SW, Hsu CL. Electron field emission enhancement of hybrid Cu/CuO nanowires fabricated by rapid thermal reduction of CuO nanowires. RSC Adv 2015. [DOI: 10.1039/c5ra08330c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
CuO nanowires (NWs) were grown via the thermal oxidation of Cu film deposited on a CuO/glass template.
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Affiliation(s)
- Yen-Ming Juan
- Institute of Microelectronics
- Department of Electrical Engineering
- National Cheng Kung University
- Tainan 701
- Taiwan
| | - Shoou-Jinn Chang
- Institute of Microelectronics
- Department of Electrical Engineering
- National Cheng Kung University
- Tainan 701
- Taiwan
| | - Han-Ting Hsueh
- National Nano Device Laboratories
- National Applied Research Laboratories
- Tainan 741
- Taiwan
| | - Sin-Hui Wang
- Institute of Microelectronics
- Department of Electrical Engineering
- National Cheng Kung University
- Tainan 701
- Taiwan
| | - Tsung-Chieh Cheng
- Department of Mechanical Engineering
- National Kaohsiung University of Applied Science
- Kaohsiung 807
- Taiwan
| | - Shih-Wei Huang
- Department of Mechanical Engineering
- National Kaohsiung University of Applied Science
- Kaohsiung 807
- Taiwan
| | - Cheng-Liang Hsu
- Department of Electrical Engineering
- National University of Tainan
- Tainan 700
- Taiwan
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23
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Hsu CL, Chang SJ. Doped ZnO 1D nanostructures: synthesis, properties, and photodetector application. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:4562-85. [PMID: 25319960 DOI: 10.1002/smll.201401580] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 08/01/2014] [Indexed: 05/14/2023]
Abstract
In the past decades, the doping of ZnO one-dimensional nanostructures has attracted a great deal of attention due to the variety of possible morphologies, large surface-to-volume ratios, simple and low cost processing, and excellent physical properties for fabricating high-performance electronic, magnetic, and optoelectronic devices. This article mainly concentrates on recent advances regarding the doping of ZnO one-dimensional nanostructures, including a brief overview of the vapor phase transport method and hydrothermal method, as well as the fabrication process for photodetectors. The dopant elements include B, Al, Ga, In, N, P, As, Sb, Ag, Cu, Ti, Na, K, Li, La, C, F, Cl, H, Mg, Mn, S, and Sn. The various dopants which act as acceptors or donors to realize either p-type or n-type are discussed. Doping to alter optical properties is also considered. Lastly, the perspectives and future research outlook of doped ZnO nanostructures are summarized.
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Affiliation(s)
- Cheng-Liang Hsu
- Departments of Electrical Engineering, National University of Tainan, Tainan, 700, Taiwan
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24
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Das PP, Agarkar SA, Mukhopadhyay S, Manju U, Ogale SB, Devi PS. Defects in chemically synthesized and thermally processed ZnO nanorods: implications for active layer properties in dye-sensitized solar cells. Inorg Chem 2014; 53:3961-72. [PMID: 24684654 DOI: 10.1021/ic500279q] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We have carried out the effect of post annealing temperatures on the performance of solution-grown ZnO rods as photoanodes in dye-sensitized solar cells. Keeping our basic objective of exploring the effect of native defects on the performance of DSSC, we have synthesized ZnO rods having length in the range of 2-5 μm by a modified sonication-induced precipitation technique. We performed extensive characterization on the samples annealed at various temperatures and confirmed that annealing at 300 °C results in ZnO rods with minimum native defects that have been identified as doubly ionized oxygen vacancies. The electron paramagnetic resonance measurements on the samples, on the other hand, confirmed the presence of shallow donors in the low temperature annealed samples. We also carried out electrochemical impedance measurements to understand the transport properties at different interfaces in the solar cell assembly. We could conclude that solution-processed ZnO rods annealed at 300 °C are better suited for fabricating DSSC with improved efficiency (1.57%), current density (5.11 mA/cm(2)), and fill factor (45.29%). On the basis of our results, we were able to establish a close connection between the defects in the metal oxide electron transporting nano system and the DSSC performance.
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Affiliation(s)
- Partha Pratim Das
- Nano-Structured Materials Division, and ‡Materials Characterization Division, CSIR-Central Glass and Ceramic Research Institute , Kolkata 700 032, India
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25
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Xue X, Wang T, Jiang X, Jiang J, Pan C, Wu Y. Interaction of hydrogen with defects in ZnO nanoparticles – studied by positron annihilation, Raman and photoluminescence spectroscopy. CrystEngComm 2014. [DOI: 10.1039/c3ce42202j] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Gokarna A, Parize R, Kadiri H, Nomenyo K, Patriarche G, Miska P, Lerondel G. Highly crystalline urchin-like structures made of ultra-thin zinc oxide nanowires. RSC Adv 2014. [DOI: 10.1039/c4ra06327a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synthesis of ultra-thin, well-aligned, monocrystalline, highly luminescent ZnO nanowires on polystyrene beads as templates.
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Affiliation(s)
- Anisha Gokarna
- Laboratoire de Nanotechnologie et d'Instrumentation Optique
- Institut Charles Delaunay
- CNRS UMR 6281
- Université de Technologie de Troyes
- 10010 Troyes, France
| | - Romain Parize
- Laboratoire de Nanotechnologie et d'Instrumentation Optique
- Institut Charles Delaunay
- CNRS UMR 6281
- Université de Technologie de Troyes
- 10010 Troyes, France
| | - Hind Kadiri
- Laboratoire de Nanotechnologie et d'Instrumentation Optique
- Institut Charles Delaunay
- CNRS UMR 6281
- Université de Technologie de Troyes
- 10010 Troyes, France
| | - Komla Nomenyo
- Laboratoire de Nanotechnologie et d'Instrumentation Optique
- Institut Charles Delaunay
- CNRS UMR 6281
- Université de Technologie de Troyes
- 10010 Troyes, France
| | - Gilles Patriarche
- Laboratory of Photonics and Nanostructures
- UPR-20
- 91460 Marcoussis, France
| | - Patrice Miska
- Institut Jean Lamour – CNRS UMR 7198 – Université de Lorraine
- Faculté des Sciences et Technologies
- F-54506 Vandoeuvre les Nancy, France
| | - Gilles Lerondel
- Laboratoire de Nanotechnologie et d'Instrumentation Optique
- Institut Charles Delaunay
- CNRS UMR 6281
- Université de Technologie de Troyes
- 10010 Troyes, France
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27
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Li J, Fu T, Chen Y, Guan B, Zhuo M, Yang T, Xu Z, Li Q, Zhang M. Highly sensitive humidity sensors based on Sb-doped ZnSnO3 nanoparticles with very small sizes. CrystEngComm 2014. [DOI: 10.1039/c3ce42172d] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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28
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Zhou H, Wang H, Zheng K, Gu Z, Wu Z, Tian X. Aluminum-doped zinc oxide nanoparticles with tunable near-infrared absorption/reflectance by a simple solvothermal process. RSC Adv 2014. [DOI: 10.1039/c4ra08196j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aluminum-doped ZnO nanoparticles with tunable NIR absorption.
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Affiliation(s)
- Haifeng Zhou
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031, China
| | - Hua Wang
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031, China
| | - Kang Zheng
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031, China
| | - Zhen Gu
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031, China
| | - Zhaofeng Wu
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031, China
| | - Xingyou Tian
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031, China
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29
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Gopalakrishnan M, Purushothaman V, Ramakrishnan V, Bhalerao GM, Jeganathan K. The effect of nitridation temperature on the structural, optical and electrical properties of GaN nanoparticles. CrystEngComm 2014. [DOI: 10.1039/c3ce42417k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitridation at high temperature enhances the crystalline and optical quality of GaN nanoparticles synthesized by a novel chemical co-precipitation method.
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Affiliation(s)
- M. Gopalakrishnan
- Centre for Nanoscience and Nanotechnology
- School of Physics
- Bharathidasan University
- Tiruchirappalli – 620 024, India
| | - V. Purushothaman
- Centre for Nanoscience and Nanotechnology
- School of Physics
- Bharathidasan University
- Tiruchirappalli – 620 024, India
| | - V. Ramakrishnan
- Department of Laser Studies
- School of Physics
- Madurai Kamaraj University
- Madurai – 625 021, India
| | - G. M. Bhalerao
- UGC-DAE Consortium for Scientific Research (CSR)
- Kalpakkam Node
- , India
| | - K. Jeganathan
- Centre for Nanoscience and Nanotechnology
- School of Physics
- Bharathidasan University
- Tiruchirappalli – 620 024, India
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30
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Ibrahim Dar M, Arora N, Pratap Singh N, Sampath S, Shivashankar SA. Role of spectator ions in influencing the properties of dopant-free ZnO nanocrystals. NEW J CHEM 2014. [DOI: 10.1039/c4nj00410h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of defects on the functional properties of dopant-free ZnO nanocrystals has been established by recording their luminescence and magnetism.
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Affiliation(s)
- M. Ibrahim Dar
- Centre for Nano Science and Engineering
- Indian Institute of Science
- Bangalore 560012, India
- Materials Research Centre
- Indian Institute of Science
| | - Neha Arora
- Department of Inorganic & Physical Chemistry
- Indian Institute of Science
- Bangalore 560012, India
| | - Nagendra Pratap Singh
- Centre for Nano Science and Engineering
- Indian Institute of Science
- Bangalore 560012, India
- Mechanical Engineering
- Indian Institute of Science
| | - S. Sampath
- Department of Inorganic & Physical Chemistry
- Indian Institute of Science
- Bangalore 560012, India
| | - Srinivasrao A. Shivashankar
- Centre for Nano Science and Engineering
- Indian Institute of Science
- Bangalore 560012, India
- Materials Research Centre
- Indian Institute of Science
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31
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Chen Y, Guo X, Tse WH, Sham TK, Zhang J. Magnetic anisotropy induced in NiCo granular nanostructures by ZnO nanorods deposited on a polymer substrate. RSC Adv 2014. [DOI: 10.1039/c4ra07210c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Magnetic hetero-nanostructures were deposited on a polymer substrate by a two-step method. Magnetic anisotropy was found to be induced in the CoNi nanostructures by ZnO nanorods deposited on the flexible substrate.
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Affiliation(s)
- Yi Chen
- Department of Chemical and Biochemical Engineering
- University of Western Ontario
- London, Canada
| | - Xiaoxuan Guo
- The Chemistry Department
- University of Western Ontario
- London, Canada
| | - Wai Hei Tse
- Department of Chemical and Biochemical Engineering
- University of Western Ontario
- London, Canada
| | - Tsun-Kong Sham
- The Chemistry Department
- University of Western Ontario
- London, Canada
| | - Jin Zhang
- Department of Chemical and Biochemical Engineering
- University of Western Ontario
- London, Canada
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32
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Pan SS, Yu SF, Zhang WF, Zhu H, Lu W, Jin LM. Low threshold amplified spontaneous emission from tin oxide quantum dots: a instantiation of dipole transition silence semiconductors. NANOSCALE 2013; 5:11561-11567. [PMID: 24077429 DOI: 10.1039/c3nr03523a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Direct bandgap semiconductors, such as In2O3, Cu2O, and SnO2, have enormous applications in photochemistry, photovoltaics, and optoelectronics. Due to the same parity of conduction and valence bands, the dipole transition is silent in these direct bandgap semiconductors. The low band-to-band transition efficiency prevents them from high intensity light emission or absorption. Here, we report the fabrication of SnO2 quantum dots (QDs) with sizes less than the exciton Bohr radius by a facile "top-down" strategy based on laser fragmentation of SnO in water. The SnO2 QDs shows exciton emission at ∼300 nm with a high quantum yield of ~17%. Amplified spontaneous exciton emission is also achieved from a thin layer of SnO2 QDs dispersed in PEG400 on a quartz substrate. Therefore, we have shown that SnO2 QDs can be a potential luminescent material suitable for the realization of ultraviolet B lasing devices.
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Affiliation(s)
- Shu Sheng Pan
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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33
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Chen C, He H, Lu Y, Wu K, Ye Z. Surface passivation effect on the photoluminescence of ZnO nanorods. ACS APPLIED MATERIALS & INTERFACES 2013; 5:6354-6359. [PMID: 23751404 DOI: 10.1021/am401418b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report an investigation of the impact of surface passivation on the optical properties of ZnO nanorods. Al2O3 coating and hydrogen plasma treatment were used to passivate the surface states. It was found that Al2O3 coating led to the suppression of the deep level emissions, while hydrogen plasma treatment completely quenched the deep level emissions. It was confirmed that the surface states of the as-grown ZnO nanorod arrays indeed contributed to the deep level emissions. Evidence was also provided that shows surface states have a greater impact on the green emission than the orange emission and may cause the negative thermal quenching behavior. Moreover, the passivation effect was confirmed by the changes of the O 1s and Zn 2p spectra.
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Affiliation(s)
- Cong Chen
- State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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34
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Lv J, Li C, BelBruno JJ. Defect evolution on the optical properties of H+-implanted ZnO whiskers. CrystEngComm 2013. [DOI: 10.1039/c3ce40655e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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