Zahra Mohammed Saeed, Yasir Hussein Mohammed, Samir Mahmmod Ahmad
{"title":"Atmospheric Pressure Chemical Vapor Deposition Grown One-Dimensional ZnO Nanostructures","authors":"Zahra Mohammed Saeed, Yasir Hussein Mohammed, Samir Mahmmod Ahmad","doi":"10.1134/S1063783424600742","DOIUrl":null,"url":null,"abstract":"<p>One-dimensional (1D) zinc oxide (ZnO) nanostructures (NSs) as nanowires (NWs) and columnar nanoflakes (NFs) were prepared by atmospheric pressure chemical vapor deposition (APCVD) system. The effect of different thermal treatment times (0, 1, 2, and 3 h) on the physical properties of the grown ZnO NWs was methodically investigated. Further, the surface morphology of such 1D ZnO NSs was studied under different substrates (glass and silicon (Si)). The samples revealed that the synthesized ZnO NWs strongly depended on the thermal treatment time. Prepared samples were well characterized using ultraviolet visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and energy-dispersive X-ray (EDX) spectroscopy. The optical band gap (<i>E</i><sub><i>g</i></sub>) widened from 3.2 to 3.3 eV as the thermal treatment time increased and the transmittance of the NWs improved to approximately 75%, accompanied by a blue-shift at the UV absorption edge. FTIR results disclosed that ZnO absorption bands in the region between 445.5 and 478.3 cm<sup>–1</sup> have appeared from interatomic vibrations owing to the stretching of the Zn–O bond. XRD findings of the studied samples disclosed the polycrystalline hexagonal wurtzite structure with preferred orientation along the <i>c</i>-axis. According to the FESEM images, the morphological transition of the hierarchical ZnO NWs to individual NWs architectures was accomplished by increasing the treatment time from 0 to 3 h. Also, FESEM images indicated that the substrate type played a crucial role in determining the morphologies of 1D ZnO NSs. EDX outcomes showed a little Zn deficiency in the prepared samples with slightly different stoichiometric ratios between Zn and O atoms. Our current work could form the foundation for fabricating future nano-optoelectronic devices.</p>","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.9000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics of the Solid State","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063783424600742","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}
引用次数: 0
Abstract
One-dimensional (1D) zinc oxide (ZnO) nanostructures (NSs) as nanowires (NWs) and columnar nanoflakes (NFs) were prepared by atmospheric pressure chemical vapor deposition (APCVD) system. The effect of different thermal treatment times (0, 1, 2, and 3 h) on the physical properties of the grown ZnO NWs was methodically investigated. Further, the surface morphology of such 1D ZnO NSs was studied under different substrates (glass and silicon (Si)). The samples revealed that the synthesized ZnO NWs strongly depended on the thermal treatment time. Prepared samples were well characterized using ultraviolet visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and energy-dispersive X-ray (EDX) spectroscopy. The optical band gap (Eg) widened from 3.2 to 3.3 eV as the thermal treatment time increased and the transmittance of the NWs improved to approximately 75%, accompanied by a blue-shift at the UV absorption edge. FTIR results disclosed that ZnO absorption bands in the region between 445.5 and 478.3 cm–1 have appeared from interatomic vibrations owing to the stretching of the Zn–O bond. XRD findings of the studied samples disclosed the polycrystalline hexagonal wurtzite structure with preferred orientation along the c-axis. According to the FESEM images, the morphological transition of the hierarchical ZnO NWs to individual NWs architectures was accomplished by increasing the treatment time from 0 to 3 h. Also, FESEM images indicated that the substrate type played a crucial role in determining the morphologies of 1D ZnO NSs. EDX outcomes showed a little Zn deficiency in the prepared samples with slightly different stoichiometric ratios between Zn and O atoms. Our current work could form the foundation for fabricating future nano-optoelectronic devices.
期刊介绍:
Presents the latest results from Russia’s leading researchers in condensed matter physics at the Russian Academy of Sciences and other prestigious institutions. Covers all areas of solid state physics including solid state optics, solid state acoustics, electronic and vibrational spectra, phase transitions, ferroelectricity, magnetism, and superconductivity. Also presents review papers on the most important problems in solid state physics.