This research presents an innovative approach for ethanol gas detection by utilizing a cholesteric liquid crystal (CLC) dispersed with titanium dioxide nanorods (TiO NRs). Titanium dioxide nanorods (TiO NRs) are synthesized using a hydrothermal method, ensuring uniform and effective doping process in the CLC matrix. The morphological and structural properties of the synthesized TiO nanorods are thoroughly analyzed using Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM), revealing the successful formation of rod-like structures. Brunauer-Emmett-Teller (BET) analysis confirms the porous nature of these nanorods, with a surface area of 3.158 m²/g and a mesoporous distribution featuring an average pore size of 14.0 nm. The CLC/TiO NRs sensor shows high sensitivity and rapid detection, with a response time of 21 sec. It also exhibits excellent selectivity against various gases, maintaining consistent performance over multiple cycles. The enhanced sensing performance is attributed to the interaction between ethanol gas molecules and TiO NRs, leading to a change in resistance within the CLC matrix. This work demonstrates the potential of TiO NRs in enhancing the capabilities of CLCs for environmental sensing and provides a promising direction for future research in developing highly sensitive and selective gas sensors.

中文翻译：

---

使用分散在胆甾型液晶中的 TiO2 纳米棒增强乙醇气体检测：合成、表征和传感性能


这项研究提出了一种利用分散有二氧化钛纳米棒 (TiO NR) 的胆甾型液晶 (CLC) 进行乙醇气体检测的创新方法。采用水热法合成二氧化钛纳米棒 (TiO NR)，确保 CLC 基体中均匀有效的掺杂过程。使用扫描电子显微镜（SEM）和透射电子显微镜（TEM）对合成的 TiO 纳米棒的形态和结构特性进行了彻底分析，揭示了棒状结构的成功形成。 Brunauer-Emmett-Teller (BET) 分析证实了这些纳米棒的多孔性质，其表面积为 3.158m²/g，介孔分布，平均孔径为 14.0nm。 CLC/TiO NRs 传感器具有高灵敏度和快速检测的特点，响应时间为 21 秒。它还对各种气体表现出出色的选择性，在多个循环中保持一致的性能。传感性能的增强归因于乙醇气体分子和 TiO NR 之间的相互作用，导致 CLC 基质内的电阻发生变化。这项工作展示了 TiO NR 在增强 CLC 环境传感能力方面的潜力，并为未来开发高灵敏度和选择性气体传感器的研究提供了有前景的方向。