tailieunhanh - Báo cáo hóa học: " The current image of single SnO2 nanobelt nanodevice studied by conductive atomic force microscopy"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : The current image of single SnO2 nanobelt nanodevice studied by conductive atomic force microscopy | Wang et al. Nanoscale Research Letters 2011 6 541 http content 6 1 541 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access The current image of single SnO2 nanobelt nanodevice studied by conductive atomic force microscopy Shujie Wang Gang Cheng Ke Cheng Xiaohong Jiang and Zuliang Du Abstract A single SnO2 nanobelt was assembled on a pair of Au electrodes by electric-field assembly method. The electronic transport property of single SnO2 nanobelt was studied by conductive atomic force microscopy C-AFM . Back-to-back Schottky barrier-type junctions were created between AFM tip SnO2 nanobelt Au electrode which can be concluded from the I-V curve. The current images of single SnO2 nanobelt nanodevices were also studied by C-AFM techniques which showed stripes patterns on the nanobelt surface. The current images of the nanobelt devices correlate the microscopy with separate transport properties measurement together. Keywords SnO2 nanobelt C-AFM current image Introduction As an important wide band n-type semiconductor SnO2 possesses many unique optical and electrical properties which have been widely used in optoelectronic devices and gas sensors 1-4 . One dimensional 1-D SnO2 have been reported to have some different characteristics from the bulk crystal due to its large surface-to-volume ratio 5 . Nanodevices based on 1-D SnO2 nanostructures have been fabricated and showed significant potential for applications ranging from field-effect transistors gas sensors displays as well as solar cells 6-9 . Although promising results of the gas sensing and other performance of 1-D SnO2 have been reported the development of highly sensitized devices remains a future challenge. Usually the surface atoms and states on the 1-D SnO2 surface play an important role in its transport behavior which complicates the nanodevice characterization 10 . Recent research result showed that the surfac e states indeed existe d in these wires which .

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