Journal
NANOSCALE RESEARCH LETTERS
Volume 9, Issue -, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/1556-276X-9-503
Keywords
Pd-doped SnO2; Single nanoribbon; Gas sensor; Ethanol
Funding
- National Natural Science Foundation [10764005, 11164034]
- Yunnan Province Natural Science Foundation [2010 DC053]
- Key Applied Basic Research Program of Science and Technology Commission Foundation of Yunnan Province [2013FA035]
- New Century Training Program Foundation for Talents from the Ministry of Education of China [NCET-08-0926]
- Innovative Talents of Science and Technology Plan Projects of Yunnan Province [2012HA007]
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Monocrystal SnO2 and Pd-SnO2 nanoribbons have been successfully synthesized by thermal evaporation, and novel ethanol sensors based on a single Pd-SnO2 nanoribbon and a single SnO2 nanoribbon were fabricated. The sensing properties of SnO2 nanoribbon (SnO2 NB) and Pd-doped SnO2 nanoribbon (Pd-SnO2 NB) sensors were investigated. The results indicated that the SnO2 NB showed a high sensitivity to ethanol and the Pd-SnO2 NB has a much higher sensitivity of 4.3 at 1,000 ppm of ethanol at 230 degrees C, which is the highest sensitivity for a SnO2-based NB. Pd-SnO2 NB can detect ethanol in a wide range of concentration (1 similar to 1,000 ppm) with a relatively quick response (recovery) time of 8 s (9 s) at a temperature from 100 degrees C to 300 degrees C. In the meantime, the sensing capabilities of the Pd-SnO2 NB under 1 ppm of ethanol at 230 degrees C will help to promote the sensitivity of a single nanoribbon sensor. Excellent performances of such a sensor make it a promising candidate for a device design toward ever-shrinking dimensions because a single nanoribbon device is easily integrated in the electronic devices.
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