ICTEAM, Université catholique de Louvain (UCL), Place du Levant, 3, 1348 Louvain-la-Neuve, Belgium.
Department of Materials Science, Materia Nova ASBL, 7000 Mons, Belgium.
Sensors (Basel). 2017 Mar 24;17(4):675. doi: 10.3390/s17040675.
Today, significant attention has been brought to the development of sensitive, specific, cheap, and reliable sensors for real-time monitoring. Molecular imprinting technology is a versatile and promising technology for practical applications in many areas, particularly chemical sensors. Here, we present a chemical sensor for detecting formaldehyde, a toxic common indoor pollutant gas. Polypyrrole-based molecularly-imprinted polymer (PPy-based MIP) is employed as the sensing recognition layer and synthesized on a titanium dioxide nanotube array (TiO₂-NTA) for increasing its surface-to-volume ratio, thereby improving the sensor performance. Our sensor selectively detects formaldehyde in the parts per million (ppm) range at room temperature. It also shows a long-term stability and small fluctuation to humidity variations. These are attributed to the thin fishnet-like structure of the PPy-based MIP on the highly-ordered and vertically-aligned TiO₂-NTA.
如今，人们高度关注开发用于实时监测的灵敏、特异、廉价和可靠的传感器。分子印迹技术是一种多功能且有前途的技术，可在许多领域（特别是化学传感器）得到实际应用。在这里，我们提出了一种用于检测甲醛（一种有毒的常见室内污染物气体）的化学传感器。聚吡咯基分子印迹聚合物（PPy 基 MIP）被用作传感识别层，并在二氧化钛纳米管阵列（TiO₂-NTA）上合成，以增加其表面积与体积比，从而提高传感器性能。我们的传感器在室温下可选择性地检测ppm 级别的甲醛。它还表现出对湿度变化的长期稳定性和小波动。这归因于 PPy 基 MIP 在高度有序和垂直排列的 TiO₂-NTA 上的薄渔网状结构。
