Synthesis of ultra-thin nanobelt-like vanadium-oxide and its abnormal optical-electrical properties. Issue 4 (15th February 2023)

• Record Type: Journal Article
• Authors: Park, Hee Jung; Lee, Jeong Min; Nasir, Mohammad; Yoo, Seung Jo; Choi, Chel-Jong; Lee, Kimoon
• Is Part Of: Ceramics international. Volume 49:Issue 4(2023)
• Page Start: 6419
• Page End: 6428
• Publication Date: 2023-02-15
• Subjects: Vanadium-oxide nanobelt -- Ultra-thin thickness -- Optical & electrical property -- Thermally activated transport -- Metal-insulator transition; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.10.086
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The transport and optical response can be easily modulated in low-dimensional structures which makes them potential candidates for future technologies. Therefore, a variety of 2-dimensional nanostructures of different metal oxides were designed for a large number of applications such as energy storage, transparent electrodes, solar cells, etc. In this study, ultra-thin vanadium-oxide nanobelts were fabricated by the chemical exfoliation method (a top-down approach), and their structure, electrical, and optical properties were investigated. The nanobelts exhibited excellent structural and morphological stability even at high temperatures. Surprisingly, the metal-insulator transition was absent in vanadium oxide nanobelts, contrary to 3-dimensional vanadium dioxide structures (metal-insulator transition around 68 °C). The electrical behavior of 2-dimensionally structured vanadium oxide nanobelts was well described by thermally activated transport phenomena. The optical band gap was estimated to be ∼2.1 eV. The unique morphology (nanobelt-like) and unusual electrical-optical properties make this material a worthy candidate for applications in the electronic industry.