School of Chemical and Biological Engineering, Seoul National University, 599 Gwanangro, Sillim-dong, Gwanak-gu, Seoul 151-742, Republic of Korea.
Talanta. 2010 Sep 15;82(4):1338-43. doi: 10.1016/j.talanta.2010.06.058. Epub 2010 Jul 27.
Poly(3,4-ethylenedioxythiophene) nanotubes (PEDOT NTs) flexible membrane was successfully fabricated by vapor deposition polymerization (VDP) mediated electrospinning for ammonia gas detection. PVA nanofibers (NFs) were electrospun as a core part and polyvinyl alcohol (PVA)/PEDOT coaxial nanocables (NCs) were prepared by VDP method via EDOT monomer adsorption onto the electrospun PVA NFs as templates. To obtain the PEDOT NTs membrane, the PVA NFs were removed from PVA/PEDOT coaxial NCs with distilled water. PVA/PEDOT coaxial NCs and PEDOT NTs had the conductivities of 71 and 61 Scm(-1) and were applied as a transducer for ammonia gas detection in the range of 1-100 parts per million (ppm) of NH(3) gas. They exhibited the minimum detectable level of ca. 5 parts per million (ppm) and fast response time (less than 1s) towards ammonia gas. In a recovery time, the PEDOT NTs membrane sensor was ca. 30s and shorter compared to that of the membrane sensor based on the PVA/PEDOT NCs (ca. 50s). In addition, sensor performance of PEDOT NTs membrane was also undertaken as a function of membrane thickness. Thick membrane sensor (30 microm) had the enhanced sensitivity and the sensitivity on the membrane thickness was in the order of 30 microm>20 microm>10 microm at 60 ppm of NH(3) gas.
聚（3,4-亚乙基二氧噻吩）纳米管（PEDOT NTs）柔性膜是通过气相沉积聚合（VDP）介导的静电纺丝成功制备的，用于氨气检测。通过 VDP 方法，将聚乙烯醇（PVA）纳米纤维（NFs）作为核心部分进行静电纺丝，并通过 EDOT 单体吸附到静电纺丝 PVA NFs 上作为模板制备聚乙烯醇（PVA）/PEDOT 同轴纳米电缆（NCs）。为了获得 PEDOT NTs 膜，用去离子水从 PVA/PEDOT 同轴 NCs 中去除 PVA NFs。PVA/PEDOT 同轴 NCs 和 PEDOT NTs 的电导率分别为 71 和 61 Scm(-1)，并被用作检测 1-100 百万分率（ppm）范围内 NH(3)气体的传感器。它们对氨气的最低检测限约为 5 ppm，响应时间快（小于 1s）。在恢复时间内，PEDOT NTs 膜传感器约为 30s，比基于 PVA/PEDOT NCs 的膜传感器（约 50s）短。此外，还研究了 PEDOT NTs 膜传感器的性能作为膜厚度的函数。厚膜传感器（30 µm）具有增强的灵敏度，在 60 ppm 的 NH(3)气体下，灵敏度的膜厚度顺序为 30 µm>20 µm>10 µm。
