Gulsaran Ahmet, Bastug Azer Bersu, Gursu Gamze, Tasaltin Cihat, Tasaltin Nevin, Ozyigit Dogu, Kim A-Reum, Zhao Boxin, Pope Michael A, Yavuz Mustafa
Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Ave. West, Waterloo, N2L 3G1, ON, Canada.
Waterloo Institute for Nanotechnology (WIN), University of Waterloo, 200 University Ave. West, Waterloo, N2L 3G1, ON, Canada.
Discov Nano. 2025 Jul 11;20(1):110. doi: 10.1186/s11671-025-04284-w.
Borophene and silicene, two novel members of the Xene family, feature high surface reactivity and stability suitable for sensing applications. However, the gas sensing capabilities of these materials in their pristine form have not been systematically investigated. Here we show that borophene- and silicene-based quartz crystal microbalance (QCM) sensors achieve stable and sensitive relative humidity detection and we model their adsorption-desorption mechanisms. Borophene and silicene nanosheets were synthesized via liquid-phase exfoliation and characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller surface area analysis. The QCM sensors exhibited sensitivities of 3.2 Hz/%RH and 3.9 Hz/%RH, response/recovery times of 122/65 s and 47/130 s and hysteresis of 1.8% and 3.8% hysteresis for borophene and silicene, respectively. The dominant sensing mechanism was determined to be chemisorption, supported by thermodynamic modeling. These results suggest that 2D borophene and silicene can significantly contribute to sensing applications, especially in environments requiring air stability.
硼烯和硅烯是烯族的两个新型成员，具有高表面反应性和稳定性，适用于传感应用。然而，这些材料原始形式的气敏性能尚未得到系统研究。在此，我们展示了基于硼烯和硅烯的石英晶体微天平（QCM）传感器实现了稳定且灵敏的相对湿度检测，并对其吸附-解吸机制进行了建模。通过液相剥离法合成了硼烯和硅烯纳米片，并通过透射电子显微镜（TEM）、X射线光电子能谱和布鲁诺尔-埃米特-泰勒表面积分析对其进行了表征。QCM传感器对硼烯和硅烯的灵敏度分别为3.2 Hz/%RH和3.9 Hz/%RH，响应/恢复时间分别为122/65秒和47/130秒，滞后率分别为1.8%和3.8%。热力学建模表明，主要传感机制为化学吸附。这些结果表明，二维硼烯和硅烯可显著推动传感应用，尤其是在需要空气稳定性的环境中。
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