Conducting polymer-based sensors for food and drug analysis   全文下載

Conducting polymer-based sensors for food and drug analysis

"Conducting polymers (CPs) are a category of polymeric materials with conjugated main chains. The characteristicelectrical and optical properties of CPs can be fine-tuned through controlling the doping states of CPs. Because of theirlong-term stability in water, CPs have been demonstrated as electroactive biointerfaces and electrode materials especiallyin aqueous environments. Serving as multifunctional interfaces and organic electrodes for the integration bioelectronicsand devices, CPs have been studied and applied in various biological applications. This paper provides areview of conducting polymerebased electrochemical sensors, particularly those used in biological fields. Generalconducting polymers and derivatives and their main electrochemical sensing platforms with different design of devicesare introduced. Cyclic voltammetry, differential pulse voltammetry, chronoamperometry, electrochemical impedancespectroscopy, and quartz crystal microbalance methods and their features are then explored as detection methods for theanalysis of drugs and food. To enhance the sensitivity and lower the detection limit of sensing platforms, various CPbasednanocomposites have been designed and developed. Although the electrodes made of CP-based nanocompositesusually outperform those made of pristine CPs, more systematic studies are required to provide insights into the designof nanocomposite-based electrodes. More applications of CP-based sensors for advanced food and drug analyses areexpected."