| 초록 |
Sensors for trace detection of hazardous chemicals have been investigated for environmental remediation, public safety, military and homeland defense applications because of terrorist threats. First, organic field-effect transistor (OFET) based sensors have been proposed and investigated, as OFETs possess advantages of easy tuning of chemical and physical properties, low-cost processing, and mechanical flexibility, and as sensors they offer fast readout on analyte exposure from simple probes and meters. We demonstrated a “turn-on” current response from PQT12:TPT-TTF blend OFETs when exposed to dilute TNT analyte solutions, in contrast to what is generally observed from OFETs exposed to various chemical compounds. Next, Resistive devices including molecularly imprinted polymers (MIPs) active layer were fabricated by simple spin-coating on flexible and transparent substrates in addition to silicon substrates and were stable under ambient temperature and oxygen levels before exposure to the nitroaromatics. Templating, also known in more specific cases as molecular imprinting, has become a widely used method for the preparation of polymeric materials that have the ability to bind a specific chemical species in pores. |
