Hwang Min-Jin, Shim Wang Geun, Choi Won-Seok, Moon Hee
Center for Functional Nano Fine Chemicals and School of Applied Chemical Engineering, Chonnam National University, Gwangju 500-750, Korea.
J Nanosci Nanotechnol. 2013 Jun;13(6):4168-71. doi: 10.1166/jnn.2013.7000.
In order to investigate the effect of surface morphology on the sensing performance in detecting sulfur dioxide, two different types polystyrene, polystyrene latex spheres (PLS) and polystyrene film (PSF), are synthesized by using an emulsion polymerization, which are coated on quartz crystal microbalance (QCM) surfaces. It is found that the sensing performance is strongly dependent on the morphology of polymer materials. The adsorption capacity of the synthesized PLS is higher than that of the PSF. In addition, the response of the PLS coated QCM to SO2 is approximately 6 times faster than that of the PSF coated one. The adsorption characteristics of SO2 on the PLS coated QCM are also evaluated in terms of temperature and concentration. These results show that the PLS can be used as SO2 sensor materials due to their high sensitivity and quick response.
为了研究表面形态对检测二氧化硫传感性能的影响，采用乳液聚合法合成了两种不同类型的聚苯乙烯，即聚苯乙烯乳胶球（PLS）和聚苯乙烯薄膜（PSF），并将它们涂覆在石英晶体微天平（QCM）表面。研究发现，传感性能强烈依赖于聚合物材料的形态。合成的PLS的吸附容量高于PSF。此外，涂覆PLS的QCM对SO2的响应速度比涂覆PSF的QCM快约6倍。还从温度和浓度方面评估了SO2在涂覆PLS的QCM上的吸附特性。这些结果表明，PLS因其高灵敏度和快速响应可作为SO2传感器材料。
