The conventional methods used to analyze environmental pollutants such as dioxins and hormone-disrupting chemicals are generally complicated and time-consuming. Another drawback is that samples of environmental pollutants have to be taken to a laboratory for analysis. However, a chemical sensor provides a simple way to measure the concentration of environmental pollutants by dipping the sensor into a sample solution. Our laboratory studies mainly concern the development of highly sensitive chemical sensors to rapidly and easily analyze environmental pollutants.