Azmer Mohamad Izzat, Aziz Fakhra, Ahmad Zubair, Raza Ehsan, Najeeb Mansoor Ani, Fatima Noshin, Bawazeer Tahani M, Alsoufi Mohammad S, Shakoor R A, Sulaiman Khaulah
Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia; Department of Electronics, Jinnah College for Women, University of Peshawar, Peshawar 25120, Pakistan.
Talanta. 2017 Nov 1;174:279-284. doi: 10.1016/j.talanta.2017.06.016. Epub 2017 Jun 7.
This research work demonstrates compositional engineering of an organic-inorganic hybrid nano-composites for modifying absolute threshold of humidity sensors. Vanadyl-2,9,16,23-tetraphenoxy-29H,31H-phthalocyanine (VOPcPhO), an organic semiconductor, doped with Titanium-dioxide nanoparticles (TiO NPs) has been employed to fabricate humidity sensors. The morphology of the VOPcPhO:TiO nano-composite films has been analyzed by atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM). The sensors have been examined over a wide range of relative humidity i.e. 20-99% RH. The sensor with TiO (90nm) shows reduced sensitivity-threshold and improved linearity. The VOPcPhO:TiO (90nm) nano-composite film is comprised of uniformly distributed voids which makes the surface more favorable for adsorption of moisture content from environment. The VOPcPhO:TiO nano-composite based sensor demonstrates remarkable improvement in the sensing parameter when equated with VOPcPhO sensors.
这项研究工作展示了用于改变湿度传感器绝对阈值的有机-无机杂化纳米复合材料的组成工程。已采用掺杂有二氧化钛纳米颗粒（TiO NPs）的有机半导体钒氧基-2,9,16,23-四苯氧基-29H,31H-酞菁（VOPcPhO）来制造湿度传感器。通过原子力显微镜（AFM）和场发射扫描电子显微镜（FESEM）分析了VOPcPhO:TiO纳米复合薄膜的形态。已在较宽的相对湿度范围即20 - 99%RH内对传感器进行了检测。具有TiO（90nm）的传感器显示出降低的灵敏度阈值和改善的线性度。VOPcPhO:TiO（90nm）纳米复合薄膜由均匀分布的空隙组成，这使得表面更有利于从环境中吸附水分。与VOPcPhO传感器相比，基于VOPcPhO:TiO纳米复合材料的传感器在传感参数方面表现出显著改善。
