tailieunhanh - Báo cáo hóa học: " Fabrication and ultraviolet photoresponse characteristics of ordered SnOx (x ≈ 0.87, 1.45, 2) nanopore films"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Fabrication and ultraviolet photoresponse characteristics of ordered SnOx (x ≈ , , 2) nanopore films | Li et al. Nanoscale Research Letters 2011 6 615 http content 6 1 615 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Fabrication and ultraviolet photoresponse characteristics of ordered SnOx x 2 nanopore films 1 1 2 13 1 Changli Li Maojun Zheng Xianghu Wang Lujun Yao Li Ma and Wenzhong Shen Abstract Based on the porous anodic aluminum oxide templates ordered SnOx nanopore films approximately 150 nm thickness with different x x 2 have been successfully fabricated by direct current magnetron sputtering and oxidizing annealing. Due to the high specific surface area this ordered nanopore films exhibit a great improvement in recovery time compared to thin films for ultraviolet UV detection. Especially the ordered SnOx nanopore films with lower x reveal higher UV light sensitivity and shorter current recovery time which was explained by the higher concentration of the oxygen vacancies in this SnOx films. This work presents a potential candidate material for UV light detector. PACS . Keywords highly ordered tin oxide nanopores films anodized aluminum oxide aao ultraviolet uv response oxygen vacancies Background Tin oxide is a wide band-gap eV M-type semiconductor and exhibits unique electrical and optical properties. It has been used extensively for gas sensors 1-4 solar cells 5 optoelectronic devices 6 catalysts 7 lithium-ion batteries 8 and so forth. In the last few years intensive attention has been paid to fabricate a variety of SnO2 nanostructured materials such as nanowires 9 nanobelts 10 nanoribbons 11 nanotubes 9 12 nanoparticles 13 and nanowhiskers 14 . However little attention had been paid to 2D ordered SnO2 porous nanomaterials as electronic and chemical devices. 2D ordered porous nanostructures with well-aligned interconnected pores are of great potential applications due to several distinctive properties such as high internal surface areas high .