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.
Highlights
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 [1,2,3,4]
The results showed that the surface states can affect the transport property of the nanobelt device and display stripe patterns in the current images
High-resolution transmission electron microscopy (HRTEM) image of a single SnO2 nanobelt is obtained with a JEM-2010 transmission electron microscope (Figure 2b)
Summary
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 [1,2,3,4]. The better understanding of the surface states affected the device transport property needed. The transport property of the nanobelts device and the surface states on the (1-D) SnO2 surface must be cared. The results showed that the surface states can affect the transport property of the nanobelt device and display stripe patterns in the current images. A horizontal alumina tube (outer diameter, 3.7 mm; length, 120 cm) is mounted inside a high-temperature tube furnace. After transferring the wafer to the center of the alumina tube, the tube is evacuated by a mechanical rotary pump to a pressure of 6 × 10-2 Torr. After applying a droplet of the SnO2 nanobelt suspension onto the electrodes, the electrodes were connected to a 10 V and 50-kHz AC signal, which was chosen for optimizing the alignment of a single nanobelt. Under the electrical polarization force, the nanobelts were deposited on the electrodes
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