Explore on the quantitative analysis of specific surface area on sensitivity of polyacrylic acid-based QCM ammonia sensor

• Published in: Sensors and actuators. B, Chemical Vol. 243; pp. 1042 - 1045
• Main Authors: Jia, Yongtang, Yu, Hui, Cai, Jie, Li, Zhe, Dong, Fengchun
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.05.2017; Elsevier Science Ltd
• Subjects: Ammonia; Beads; Coated electrodes; Crystals; Electrodeposition; Electrodes; Gold; Microbalances; Microparticles; Morphology; Physical properties; Polyacrylic acid; Quantitative analysis; Quartz crystal microbalance; Quartz crystals; Sensitivity analysis; Sensors; Specific surface; Specific surface area; Substrates; Surface area; Electrodeposition; Specific surface area; Quartz crystal microbalance; Sensors; Polyacrylic acid
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2016.12.090

[Display omitted] •Novel QCM-based PAA ammonia sensors with distinct SSAs were introduced in this study.•The fabricated PAA/QCM sensors exhibited excellent ammonia-sensing performances.•The quantitative relationship of SSA and sensitivity showed logarithmic growth function. To understand the effect of specific surface area (SSA) on the sensitivity of quartz crystal microbalance (QCM)-based polyacrylic acid (PAA) ammonia sensor, PAA substrate was deposited as sensing coating on a QCM gold electrode through an electrospray/electrospinning process. The physical properties of fabricated PAA membranes were investigated through FESEM and BET. Experimental results showed various morphologies involving microparticles, beads-on-string and fibers, as well as a wide SSA range of 1.9–14.7m2/g. The fabricated ammonia sensors exhibited excellent sensing performance including rapid response, good reversibility and high selectivity, the ammonia-detection sensitivity was closely correlated with SSA expressed by a logarithmic function curve.