A Sub-ppm acetone gas sensor for diabetes detection using 10 nm thick ultrathin InN FETs

N/ACitations
Citations of this article
147Readers
Mendeley users who have this article in their library.

Abstract

An indium nitride (InN) gas sensor of 10 nm in thickness has achieved detection limit of 0.4 ppm acetone. The sensor has a size of 1 mm by 2.5 mm, while its sensing area is 0.25 mm by 2 mm. Detection of such a low acetone concentration in exhaled breath could enable early diagnosis of diabetes for portable physiological applications. The ultrathin InN epilayer extensively enhances sensing sensitivity due to its strong electron accumulation on roughly 5-10 nm deep layers from the surface. Platinum as catalyst can increase output current signals by 2.5-fold (94 vs. 37.5 μA) as well as reduce response time by 8.4-fold (150 vs. 1,260 s) in comparison with bare InN. More, the effect of 3% oxygen consumption due to breath inhalation and exhalation on 2.4 ppm acetone gas detection was investigated, indicating that such an acetone concentration can be analyzed in air. © 2012 by the authors; licensee MDPI, Basel, Switzerland.

Cite

CITATION STYLE

APA

Kao, K. W., Hsu, M. C., Chang, Y. H., Gwo, S., & Andrew Yeh, J. (2012). A Sub-ppm acetone gas sensor for diabetes detection using 10 nm thick ultrathin InN FETs. Sensors (Switzerland), 12(6), 7157–7168. https://doi.org/10.3390/s120607157

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free