Electrochemical sensors and biosensors have recently been the most fast growing class of chemical sensors in analytical chemistry. Electrochemical sensors have been used extensively either as a whole or a basic part of a chemical and biomedical sensing devices in clinical, food, and environmental analysis. Glucose biosensors used widely in glucometer, blood gas sensors, and pH electrodes are the most important and known electrochemical sensors.

Electrochemical sensors and biosensors provide low detection limits, a wide linear response range, and good stability and reproducibility.

An electrochemical sensor is a device that transforms electrochemical information into an analytically useful signal. Electrochemical sensors usually composed of two basic components: a chemical (molecular) recognition system which is the most important part of a sensor and a physicochemical transducer which is a device that converts the chemical response into a signal that can be detected by modern electrical instrumentations. These two parts form a working (or sensing) electrode. A reference electrode and sometimes a counter electrode are also used in electrical measurements. Biosensors are chemical sensors in which the recognition system utilizes a biochemical mechanism.

Transduction of the biological or chemical signal in to the electrical signal can be done by amperometry, voltammetry, potentiometry, or conductometry.

We invite researchers to contribute to this special issue by submitting their original research articles or review articles. We are particularly interested in articles describing new electrochemical sensing techniques used in clinical, environmental, or industrial applications. Also, application of nanomaterials in construction of electrochemical sensors and biosensors would be interesting topics. Potential topics include, but are not limited to:

• Electrochemical sensors and biosensors applied for clinical, food, and environmental analysis
• Nanomaterials, nanodevices: fabrication, characterization, and application in electrochemical sensors and biosensors
• Electrochemical immunosensors
• Pharmaceutical sensors
• Molecularly imprinted electrochemical sensors
• Electrochemical nanosensors
• Carbon-nanotube-based electrochemical sensors
• Biocompatible electrochemical sensors
• Sensors for electrochemical energy devices such as fuel cells and battery stacks

Before submission authors should carefully read over the journal's Author Guidelines, which are located at http://www.hindawi.com/journals/ijelc/guidelines/. Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at http://mts.hindawi.com/ according to the following timetable: