近年來的研究發現，偵測人體呼氣中的丙酮濃度可用來做為非侵入式檢測糖尿病的方法。而氮化銦因其具有表面電子累積層等特性，可用來製作具有高靈敏度的丙酮氣體感測器。
本研究探討利用超薄膜 (約10 nm) 磊晶氮化銦（indium nitrite）製成之電阻式丙酮感測器之偵測反應特性，並比較裸面氮化銦與在氮化銦表面鍍上一層10 nm白金催化層的感測特性差異。結果證明在氮化銦表面鍍上10 nm白金層可提高感測器對丙酮的反應。在空氣的環境中，裸面氮化銦感測器在200°C的操作溫度下會對10 ppm的丙酮產生16 % (37.6 µA)的電流變化率，反應時間為 1262秒。在丙酮濃度介於0.4 ppm – 20 ppm的範圍內，電流變化率取對數和丙酮濃度取對數( log(△I/I0) to log(Cacetone) )會存在一線性關係，其斜率為0.58。
而鍍上白金薄膜的氮化銦感測器則是在200°C的操作溫度下會對10 ppm的丙酮產生28.7 % (94 µA) 的電流變化率，反應時間為150 秒。電流變化率取對數和丙酮濃度取對數會存在一線性關係，其斜率為0.50。裸面氮化銦感測器和具白金層之氮化銦感測器皆可偵測到濃度低於0.4 ppm的丙酮氣體。而鍍上白金薄膜後，電流變化可提高約2.5倍，並且反應時間縮短了8.4倍。
本研究亦探討了二氧化碳和氧氣對具白金層之氮化銦感測器的影響。發現當環境中氧氣濃度由原本空氣的21 %減少為16 %時，對應的電流變化率為4.6 % (15 µA)，相當於0.4 ppm丙酮所引起的電流變化率。另外，對於5 % CO2有7.6 % (26.4 µA)的電流變化率，相當於1 ppm丙酮所引起的電流變化率。

Detection of acetone concentration in exhaled breath can be developed to diagnose diabetes as a noninvasive methods. And indium nitride (InN) epilayer, which have some special electronic property such as electron accumulation, can be used to fabricate acetone gas sensors with high sensitivity.
Acetone gas sensors based on ultrathin (~10 nm) InN epilayers with and without a thin catalytic platinum (Pt) layer have been fabricated and demonstrated. The bare InN sensor exhibits a maximum response at 200 °C in air ambiences. The maximum response of current variation under 10 ppm acetone exposure in air ambience at 200 °C corresponding to 16 % ( 37.6 µA ), with a response time of 1262 s. The plot of log(△I/I0) to log(Cacetone) shows a linear relationship with a slope of 0.58 at a acetone concentration range from 0.4 ppm to 20 ppm.
On the other hand, the Pt-coated InN sensor exhibits a higher response to acetone. At 200 °C, the sensor shows a high current variation ratio of 28.7 % (94 µA) and a short response time of 150 s under the same gas exposure environment. The plot of log(△I/I0) to log(Cacetone) shows a linear relationship with a slope of 0.50 at a acetone concentration range from 0.4 ppm to 20 ppm. In comparison with a bare InN sensor tested in the same conditions, the Pt catalytic layer enhances the current variation by 2.5 times. The detection limits of the sensors with and without a Pt layer are both less than 0.4 ppm.
The influences of carbon dioxide and oxygen on Pt-coated InN sensors have been investigated. The current variation ratio is 4.6 % (15 µA) when oxygen concentration drop off from 21 % to 16 %, near to the current variation ratio under 0.4 ppm acetone exposure. And the current variation ratio under 5 % CO2 in air ambiance is 7.6 % (26.4 µA), near to the current variation ration under 1 ppm acetone exposure.

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