Influence of morphology, crystal structures on the enhanced photoluminescence dynamics, zeta potential, and AC resistance of disc shaped cesium oxidex@cobalt oxide nanostructures
In the present study, cesium oxidex@cobalt oxide (Cs2Ox@Co3O4) (x = 5, 10 and 12 wt%) nanostructures (NS) were successfully synthesized by chemical precipitation method and characterized by XRD (X-ray diffraction), SEM (scanning electron microscope), EDX (energy dispersive X-ray), XPS (X-ray photoel...
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Elsevier
2024-12-01
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| Series: | Results in Optics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666950124001391 |
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| author | Vinayak Adimule Sunitha DV Rajeev Joshi A.K. Swetha Kalpana Sharma Rangappa Keri |
| author_facet | Vinayak Adimule Sunitha DV Rajeev Joshi A.K. Swetha Kalpana Sharma Rangappa Keri |
| author_sort | Vinayak Adimule |
| collection | DOAJ |
| description | In the present study, cesium oxidex@cobalt oxide (Cs2Ox@Co3O4) (x = 5, 10 and 12 wt%) nanostructures (NS) were successfully synthesized by chemical precipitation method and characterized by XRD (X-ray diffraction), SEM (scanning electron microscope), EDX (energy dispersive X-ray), XPS (X-ray photoelectron spectroscopy), BET (Brunauer-Emmett-Teller), Raman, and UV–visible analytical techniques. XRD studies revealed the formation of the mixed phase of orthorhombic/monoclinic crystal structure. Disc shaped morphology of the cesium oxidex@cobalt oxide NS was noticed from SEM images. Redshift in optical absorbance and decrease in optical band gap (Eg) resulted in increase in Cs1+ concentration. Room temperature photoluminescence (RTPL) studies of cesium oxidex@cobalt oxide NS at various excitation wavelengths showed sharp and broad emission peaks located at 668.2 nm (red), 675.1 nm (red), 561.8 nm (yellow-green), 834.5 nm (near infrared region), 594 nm (yellow). Steady state photoluminescence (SSPL) studies revealed a sharp emission peak at ∼ 428.0 nm (violet) with large stoke’s shift (21.1 to 590.0 eV). The zeta potential studies showed a decrease in conductance from 62 to 57 μs with an increase in mobility of the charge carriers (0.4 to 1.08 μ/s V/cm) and an increase in zeta potential (31.90 to 82.92 mV). AC resistance studies at various temperatures showed inducting coupling phenomenon in cesium oxidex@cobalt oxide NS with DC resistance of cesium oxide5 wt.%@cobalt oxide was found to be 8.2 × 10–4 Sm–1. The relaxation frequency of cesium oxide12 wt.%@cobalt oxide NS was found be 1.2 × 105 Hz. The synthesized NS is a promising candidate for optoelectronics and photonic applications. |
| format | Article |
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| institution | OA Journals |
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| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
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| series | Results in Optics |
| spelling | doaj-art-bfd2d584043b4bcf91825d08079e49092025-08-20T02:39:07ZengElsevierResults in Optics2666-95012024-12-011710074210.1016/j.rio.2024.100742Influence of morphology, crystal structures on the enhanced photoluminescence dynamics, zeta potential, and AC resistance of disc shaped cesium oxidex@cobalt oxide nanostructuresVinayak Adimule0Sunitha DV1Rajeev Joshi2A.K. Swetha3Kalpana Sharma4Rangappa Keri5Department of Chemistry, Angadi Institute of Technology and Management (AITM), Savagaon Road, Belagavi 590009, Karnataka, India; Corresponding authors at: Department of Chemistry, Angadi Institute of Technology and Management (AITM), Savagaon Road, Belagavi 590009, Karnataka, India (V. Adimule).Department of Physics, School of Applied Sciences, REVA University, Yelahanka, Sathanur, Kattigenahalli, Bangalore 560 064, Karnataka, India; Corresponding authors at: Department of Chemistry, Angadi Institute of Technology and Management (AITM), Savagaon Road, Belagavi 590009, Karnataka, India (V. Adimule).Department of Physics, School of Physical Sciences, Central University of Karnataka, Kalaburagi-585367, Karnataka, India; Corresponding authors at: Department of Chemistry, Angadi Institute of Technology and Management (AITM), Savagaon Road, Belagavi 590009, Karnataka, India (V. Adimule).Department of Physics, School of Physical Sciences, Central University of Karnataka, Kalaburagi-585367, Karnataka, IndiaDepartment of Physics, M S Ramaiah Institute of Technology, MSR Nagar-560054, Bangalore, Karnataka, IndiaCentre for Nano and Material Sciences (CNMS), Jain (Deemed-to-be)University, Jain Global Campus, Ramanagaram, Kanakapura, Bangalore 562112, Karnataka, IndiaIn the present study, cesium oxidex@cobalt oxide (Cs2Ox@Co3O4) (x = 5, 10 and 12 wt%) nanostructures (NS) were successfully synthesized by chemical precipitation method and characterized by XRD (X-ray diffraction), SEM (scanning electron microscope), EDX (energy dispersive X-ray), XPS (X-ray photoelectron spectroscopy), BET (Brunauer-Emmett-Teller), Raman, and UV–visible analytical techniques. XRD studies revealed the formation of the mixed phase of orthorhombic/monoclinic crystal structure. Disc shaped morphology of the cesium oxidex@cobalt oxide NS was noticed from SEM images. Redshift in optical absorbance and decrease in optical band gap (Eg) resulted in increase in Cs1+ concentration. Room temperature photoluminescence (RTPL) studies of cesium oxidex@cobalt oxide NS at various excitation wavelengths showed sharp and broad emission peaks located at 668.2 nm (red), 675.1 nm (red), 561.8 nm (yellow-green), 834.5 nm (near infrared region), 594 nm (yellow). Steady state photoluminescence (SSPL) studies revealed a sharp emission peak at ∼ 428.0 nm (violet) with large stoke’s shift (21.1 to 590.0 eV). The zeta potential studies showed a decrease in conductance from 62 to 57 μs with an increase in mobility of the charge carriers (0.4 to 1.08 μ/s V/cm) and an increase in zeta potential (31.90 to 82.92 mV). AC resistance studies at various temperatures showed inducting coupling phenomenon in cesium oxidex@cobalt oxide NS with DC resistance of cesium oxide5 wt.%@cobalt oxide was found to be 8.2 × 10–4 Sm–1. The relaxation frequency of cesium oxide12 wt.%@cobalt oxide NS was found be 1.2 × 105 Hz. The synthesized NS is a promising candidate for optoelectronics and photonic applications.http://www.sciencedirect.com/science/article/pii/S2666950124001391Bimetallic OxidesRoom Temperature PhotoluminescenceSteady State PhotoluminescenceZeta PotentialNanostructuresElectrical Properties |
| spellingShingle | Vinayak Adimule Sunitha DV Rajeev Joshi A.K. Swetha Kalpana Sharma Rangappa Keri Influence of morphology, crystal structures on the enhanced photoluminescence dynamics, zeta potential, and AC resistance of disc shaped cesium oxidex@cobalt oxide nanostructures Results in Optics Bimetallic Oxides Room Temperature Photoluminescence Steady State Photoluminescence Zeta Potential Nanostructures Electrical Properties |
| title | Influence of morphology, crystal structures on the enhanced photoluminescence dynamics, zeta potential, and AC resistance of disc shaped cesium oxidex@cobalt oxide nanostructures |
| title_full | Influence of morphology, crystal structures on the enhanced photoluminescence dynamics, zeta potential, and AC resistance of disc shaped cesium oxidex@cobalt oxide nanostructures |
| title_fullStr | Influence of morphology, crystal structures on the enhanced photoluminescence dynamics, zeta potential, and AC resistance of disc shaped cesium oxidex@cobalt oxide nanostructures |
| title_full_unstemmed | Influence of morphology, crystal structures on the enhanced photoluminescence dynamics, zeta potential, and AC resistance of disc shaped cesium oxidex@cobalt oxide nanostructures |
| title_short | Influence of morphology, crystal structures on the enhanced photoluminescence dynamics, zeta potential, and AC resistance of disc shaped cesium oxidex@cobalt oxide nanostructures |
| title_sort | influence of morphology crystal structures on the enhanced photoluminescence dynamics zeta potential and ac resistance of disc shaped cesium oxidex cobalt oxide nanostructures |
| topic | Bimetallic Oxides Room Temperature Photoluminescence Steady State Photoluminescence Zeta Potential Nanostructures Electrical Properties |
| url | http://www.sciencedirect.com/science/article/pii/S2666950124001391 |
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