Li Ke-Feng, Yu Chen-Hui, Liang Guang-Ling, Chen Jie, Chang Yu, Xu Gang, Wang Guan-E
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, PR China.
College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, PR China.
Nat Commun. 2025 Feb 12;16(1):1560. doi: 10.1038/s41467-025-56609-z.
Room-temperature chemiresistive sensors are valued for their low power consumption, ease of operation, and real-time monitoring capabilities, making them highly advantageous for various applications. However, the challenge of inaccurate detection due to variations in operating temperature is a significant hurdle for their practical use. To address this, we develop a ratiometric-gas sensing method that leverages the exceptional photoelectric and chemiresistive gas sensing sensitivity of organic-inorganic hybrid superlattice materials AgBDT (BDT = 1,4-benzenedithiol). This approach can effectively detect nitrogen dioxide molecules, with a detection limit of 3.06 ppb. Crucially, the ratiometric-gas sensing technique offers robust diminution to temperature interference, with the coefficient of variation value dropping from 21.81% to 7.81% within the temperature range of 25 to 65 °C, which significantly enhances the stability and reliability of the device. This method would be capable of not only the detecting of gases but also providing rapid, accurate analysis in real conditions.
室温化学电阻传感器因其低功耗、易于操作和实时监测能力而受到重视，使其在各种应用中具有高度优势。然而，由于工作温度变化导致检测不准确的挑战是其实际应用中的一个重大障碍。为了解决这个问题，我们开发了一种比率式气体传感方法，该方法利用了有机-无机杂化超晶格材料AgBDT（BDT = 1,4-苯二硫醇）出色的光电和化学电阻气体传感灵敏度。这种方法可以有效检测二氧化氮分子，检测限为3.06 ppb。至关重要的是，比率式气体传感技术对温度干扰具有强大的抑制作用，在25至65°C的温度范围内，变异系数值从21.81%降至7.81%，这显著提高了设备的稳定性和可靠性。这种方法不仅能够检测气体，还能够在实际条件下提供快速、准确的分析。
