Vertical SnSe nanorod arrays: from controlled synthesis and growth mechanism to thermistor and photoresistor
- 14 February 2014
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 25 (10), 105705
- https://doi.org/10.1088/0957-4484/25/10/105705
Abstract
We demonstrate that high-quality vertically aligned SnSe nanorod (NR) arrays have been synthesized via a facile chemical vapor deposition method on SiO₂ substrates using Bi powder as catalysts. Both SEM and TEM measurements reveal that this kind of SnSe NR consists of a one-dimensional core and dense two-dimensional branches. Thermistors and photoresistors have been fabricated in situ by directly depositing silver paint on the growth substrates. The thermistor shows the great merits of a broad temperature range (77-390 K), linear input-output characteristic, suitable thermal index and high sensitivity. The photoresistor device exhibits relatively fast response time, linear input-output, high reversibility and stability. In addition, both of the devices have the advantages of low cost, environment-friendliness and easy fabrication. The high performance of SnSe thermistors and photodetectors will make SnSe material promising in industrial multi-function nanodevices.Keywords
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