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Gorobtsov PY, Mokrushin AS, Simonenko TL, Simonenko NP, Simonenko EP, Kuznetsov NT. Microextrusion Printing of Hierarchically Structured Thick V 2O 5 Film with Independent from Humidity Sensing Response to Benzene. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7837. [PMID: 36363430 PMCID: PMC9655664 DOI: 10.3390/ma15217837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 10/28/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
The process of V2O5 oxide by the combination of sol-gel technique and hydrothermal treatment using heteroligand [VO(C5H7O2)2-x(C4H9O)x] precursor was studied. Using thermal analysis, X-ray powder diffraction (XRD) and infra-red spectroscopy (IR), it was found that the resulting product was VO2(B), which after calcining at 300 °C (1 h), oxidized to orthorhombic V2O5. Scanning electron microscopy (SEM) results for V2O5 powder showed that it consisted of nanosheets (~50 nm long and ~10 nm thick) assembled in slightly spherical hierarchic structures (diameter ~200 nm). VO2 powder dispersion was used as functional ink for microextrusion printing of oxide film. After calcining the film at 300 °C (30 min), it was found that it oxidized to V2O5, with SEM and atomic force microscopy (AFM) results showing that the film structure retained the hierarchic structure of the powder. Using Kelvin probe force microscopy (KPFM), the work function value for V2O5 film in ambient conditions was calculated (4.81 eV), indicating a high amount of deficiencies in the sample. V2O5 film exhibited selective response upon sensing benzene, with response value invariable under changing humidity. Studies of the electrical conductivity of the film revealed increased resistance due to high film porosity, with conductivity activation energy being 0.26 eV.
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Lin TC, Jheng BJ, Yen HM, Huang WC. Thermal Annealing Effects of V2O5 Thin Film as an Ionic Storage Layer for Electrochromic Application. MATERIALS 2022; 15:ma15134598. [PMID: 35806721 PMCID: PMC9267838 DOI: 10.3390/ma15134598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 06/25/2022] [Accepted: 06/27/2022] [Indexed: 02/06/2023]
Abstract
A vanadium pentoxide (V2O5) thin film with thermal annealing as an ionic storage layer for electrochromic devices is presented in our study. The V2O5 thin film was deposited on an ITO glass substrate by an RF magnetron sputtering. The electrochromic properties of the film were evaluated after various thermal annealing temperatures. The structural analysis of the film was observed by X-ray diffraction (XRD), field emission electron microscopy (FE-SEM), and atomic force microscopy (AFM). The structure of the V2O5 thin film transformed from an amorphous to polycrystalline structure with directions of (110) and (020) after 400 °C thermal annealing. The electrochromic properties of the film improved compared with the unannealed V2O5 thin film. We obtained a charge capacity of 97.9 mC/cm2 with a transparent difference ΔT value of 31% and coloration efficiency of 6.3 cm2/C after 400 °C thermal annealing. The improvement was due to the polycrystalline orthorhombic structure formation of V2O5 film by the rearrangement of atoms from thermal energy. Its laminate structure facilitates Li+ ion intercalation and increases charge capacity and transparent difference.
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Affiliation(s)
- Tien-Chai Lin
- Department of Electrical Engineering, Kun Shan University, Yongkang, Tainan 710303, Taiwan; (T.-C.L.); (B.-J.J.)
| | - Bai-Jhong Jheng
- Department of Electrical Engineering, Kun Shan University, Yongkang, Tainan 710303, Taiwan; (T.-C.L.); (B.-J.J.)
| | - Hui-Min Yen
- Green Energy Technology Research Center, Kun Shan University, Yongkang, Tainan 710303, Taiwan;
| | - Wen-Chang Huang
- Department of Electrical Engineering, Kun Shan University, Yongkang, Tainan 710303, Taiwan; (T.-C.L.); (B.-J.J.)
- Green Energy Technology Research Center, Kun Shan University, Yongkang, Tainan 710303, Taiwan;
- Correspondence:
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Impact of Zr precursor on the electrochemical properties of V2O5 sol-gel films. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.03.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chalker CJ, An H, Zavala J, Parija A, Banerjee S, Lutkenhaus JL, Batteas JD. Fabrication and Electrochemical Performance of Structured Mesoscale Open Shell V 2O 5 Networks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5975-5981. [PMID: 28494587 DOI: 10.1021/acs.langmuir.6b04163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Crystalline vanadium pentoxide (V2O5) has attracted significant interest as a potential cathode material for energy storage applications due to its high theoretical capacity. Unfortunately, the material suffers from low conductivity as well as slow lithium ion diffusion, both of which affect how fast the electrode can be charged/discharged and how many times it can be cycled. Colloidal crystal templating (CCT) provides a simple approach to create well-organized 3-D nanostructures of materials, resulting in a significant increase in surface area that can lead to marked improvements in electrochemical performance. Here, a single layer of open shell V2O5 architectures ca. 1 μm in height with ca. 100 nm wall thickness was fabricated using CCT, and the electrochemical properties of these assemblies were evaluated. A decrease in polarization effects, resulting from the higher surface area mesostructured features, was found to produce significantly enhanced electrochemical performance. The discharge capacity of an unpatterned thin film of V2O5 (∼8.1 μAh/cm2) was found to increase to ∼10.2 μAh/cm2 when the material was patterned by CCT, affording enhanced charge storage capabilities as well as a decrease in the irreversible degradation during charge-discharge cycling. This work demonstrates the importance of creating mesoscale electrode surfaces for improving the performance of energy storage devices and provides fundamental understanding of the means to improve device performance.
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Affiliation(s)
- Cody J Chalker
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Hyosung An
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Jose Zavala
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Abhishek Parija
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Sarbajit Banerjee
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Jodie L Lutkenhaus
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - James D Batteas
- Department of Chemistry, ‡Artie McFerrin Department of Chemical Engineering, and §Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States
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Glynn C, McNulty D, Geaney H, O'Dwyer C. Growing Oxide Nanowires and Nanowire Networks by Solid State Contact Diffusion into Solution-Processed Thin Films. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:5954-5962. [PMID: 27622769 DOI: 10.1002/smll.201602346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 08/05/2016] [Indexed: 06/06/2023]
Abstract
New techniques to directly grow metal oxide nanowire networks without the need for initial nanoparticle seed deposition or postsynthesis nanowire casting will bridge the gap between bottom-up formation and top-down processing for many electronic, photonic, energy storage, and conversion technologies. Whether etched top-down, or grown from catalyst nanoparticles bottom-up, nanowire growth relies on heterogeneous material seeds. Converting surface oxide films, ubiquitous in the microelectronics industry, to nanowires and nanowire networks by the incorporation of extra species through interdiffusion can provide an alternative deposition method. It is shown that solution-processed thin films of oxides can be converted and recrystallized into nanowires and networks of nanowires by solid-state interdiffusion of ionic species from a mechanically contacted donor substrate. NaVO3 nanowire networks on smooth Si/SiO2 and granular fluorine-doped tin oxide surfaces can be formed by low-temperature annealing of a Na diffusion species-containing donor glass to a solution-processed V2 O5 thin film, where recrystallization drives nanowire growth according to the crystal habit of the new oxide phase. This technique illustrates a new method for the direct formation of complex metal oxide nanowires on technologically relevant substrates, from smooth semiconductors, to transparent conducting materials and interdigitated device structures.
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Affiliation(s)
- Colm Glynn
- Department of Chemistry, University College Cork, Cork, T12 YN60, Ireland
| | - David McNulty
- Department of Chemistry, University College Cork, Cork, T12 YN60, Ireland
| | - Hugh Geaney
- Department of Chemistry, University College Cork, Cork, T12 YN60, Ireland
| | - Colm O'Dwyer
- Department of Chemistry, University College Cork, Cork, T12 YN60, Ireland
- Micro-Nano Systems Centre, Tyndall National Institute, Lee Maltings, Cork, T12 R5CP, Ireland
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Abstract
Luminescent films have received great interest for chemo-/bio-sensing applications due to their distinct advantages over solution-based probes, such as good stability and portability, tunable shape and size, non-invasion, real-time detection, extensive suitability in gas/vapor sensing, and recycling. On the other hand, they can achieve selective and sensitive detection of chemical/biological species using special luminophores with a recognition moiety or the assembly of common luminophores and functional materials. Nowadays, the extensively used assembly techniques include drop-casting/spin-coating, Langmuir-Blodgett (LB), self-assembled monolayers (SAMs), layer-by-layer (LBL), and electrospinning. Therefore, this review summarizes the recent advances in luminescent films with these assembly techniques and their applications in chemo-/bio-sensing. We mainly focused on the discussion of the relationship between the sensing properties of the films and their architecture. Furthermore, we discussed some critical challenges existing in this field and possible solutions that have been or are being developed to overcome these challenges.
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Affiliation(s)
- Weijiang Guan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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Glynn C, Aureau D, Collins G, O'Hanlon S, Etcheberry A, O'Dwyer C. Solution processable broadband transparent mixed metal oxide nanofilm optical coatings via substrate diffusion doping. NANOSCALE 2015; 7:20227-20237. [PMID: 26575987 DOI: 10.1039/c5nr06184a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Devices composed of transparent materials, particularly those utilizing metal oxides, are of significant interest due to increased demand from industry for higher fidelity transparent thin film transistors, photovoltaics and a myriad of other optoelectronic devices and optics that require more cost-effective and simplified processing techniques for functional oxides and coatings. Here, we report a facile solution processed technique for the formation of a transparent thin film through an inter-diffusion process involving substrate dopant species at a range of low annealing temperatures compatible with processing conditions required by many state-of-the-art devices. The inter-diffusion process facilitates the movement of Si, Na and O species from the substrate into the as-deposited vanadium oxide thin film forming a composite fully transparent V0.0352O0.547Si0.4078Na0.01. Thin film X-ray diffraction and Raman scattering spectroscopy show the crystalline component of the structure to be α-NaVO3 within a glassy matrix. This optical coating exhibits high broadband transparency, exceeding 90-97% absolute transmission across the UV-to-NIR spectral range, while having low roughness and free of surface defects and pinholes. The production of transparent films for advanced optoelectronic devices, optical coatings, and low- or high-k oxides is important for planar or complex shaped optics or surfaces. It provides opportunities for doping metal oxides to ternary, quaternary or other mixed metal oxides on glass, encapsulants or other substrates that facilitate diffusional movement of dopant species.
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Affiliation(s)
- Colm Glynn
- Department of Chemistry, University College Cork, Cork, T12 YN60, Ireland.
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Glynn C, Creedon D, Geaney H, Armstrong E, Collins T, Morris MA, O'Dwyer C. Linking Precursor Alterations to Nanoscale Structure and Optical Transparency in Polymer Assisted Fast-Rate Dip-Coating of Vanadium Oxide Thin Films. Sci Rep 2015; 5:11574. [PMID: 26123117 PMCID: PMC4485054 DOI: 10.1038/srep11574] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 05/29/2015] [Indexed: 12/15/2022] Open
Abstract
Solution processed metal oxide thin films are important for modern optoelectronic devices ranging from thin film transistors to photovoltaics and for functional optical coatings. Solution processed techniques such as dip-coating, allow thin films to be rapidly deposited over a large range of surfaces including curved, flexible or plastic substrates without extensive processing of comparative vapour or physical deposition methods. To increase the effectiveness and versatility of dip-coated thin films, alterations to commonly used precursors can be made that facilitate controlled thin film deposition. The effects of polymer assisted deposition and changes in solvent-alkoxide dilution on the morphology, structure, optoelectronic properties and crystallinity of vanadium pentoxide thin films was studied using a dip-coating method using a substrate withdrawal speed within the fast-rate draining regime. The formation of sub-100 nm thin films could be achieved rapidly from dilute alkoxide based precursor solutions with high optical transmission in the visible, linked to the phase and film structure. The effects of the polymer addition was shown to change the crystallized vanadium pentoxide thin films from a granular surface structure to a polycrystalline structure composed of a high density of smaller in-plane grains, resulting in a uniform surface morphology with lower thickness and roughness.
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Affiliation(s)
- Colm Glynn
- 1] Department of Chemistry, University College Cork, Cork, Ireland [2] Micro-Nano Systems Centre, Tyndall National Institute, Lee Maltings, Cork, Ireland
| | - Donal Creedon
- Department of Chemistry, University College Cork, Cork, Ireland
| | - Hugh Geaney
- 1] Department of Chemistry, University College Cork, Cork, Ireland [2] Micro-Nano Systems Centre, Tyndall National Institute, Lee Maltings, Cork, Ireland
| | - Eileen Armstrong
- 1] Department of Chemistry, University College Cork, Cork, Ireland [2] Micro-Nano Systems Centre, Tyndall National Institute, Lee Maltings, Cork, Ireland
| | - Timothy Collins
- Department of Chemistry, University College Cork, Cork, Ireland
| | - Michael A Morris
- 1] Department of Chemistry, University College Cork, Cork, Ireland [2] Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin, Ireland
| | - Colm O'Dwyer
- 1] Department of Chemistry, University College Cork, Cork, Ireland [2] Micro-Nano Systems Centre, Tyndall National Institute, Lee Maltings, Cork, Ireland
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