Laboratory of Electrochemical Sensors, Biosensors, and Energy Storage/Conversion Devices

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Welcome to the Shahrokhian Research Group Website

Welcome to the Shahrokhian,s Research Group Website. Electrochemical research laboratory, led by Dr. Shahrokhian, is located in the Chemistry Department at Sharif University of Technology, Tehran, Iran. Research in the Electrochemical Laboratory is focused on design, fabrication, development and application of electrochemical sensors/biosensors in trace analysis of pharmaceutical and biological species and fabrication electrochemical modified electrodes with nanomaterial to study electrochemical phenomena and their application in supercapacitors and fuel cells system. Our aim is to design novel modified electrodes for electro analytical determinations with good efficiency and acceptable performance. We believed that creativity, critical thinking, knowledge, and independence as prosperous feature are important for any developing research in our laboratory. Please explore the website to learn more about the research fields and projects in the laboratory and the researcher behind the scenes.

Research Fields

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Supercapasitors

Supercapacitor (SC), also called ultracapacitor or electrochemical capacitor, is a high-capacity capacitor store electrical charge on conducting materials with high-surface-area. Capacitance values of this device may be higher than 1,000 farads at 1.2 volt that bridge the gap between electrolytic capacitors and rechargeable batteries. Supercapacitors are used in applications requiring many rapid charge/discharge cycles rather than long term compact energy storage: within cars, buses, trains, cranes and elevators, where they are used for regenerative braking, short-term energy storage or burst-mode power delivery. Smaller units are used as memory backup for static random-access memory (SRAM).

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Fuel Cells

Fuel cells are a very promising technology for energy conversion, an area dominated by old technologies, such as the internal combustion engine and the gas turbine, which have to be replaced to allow decarbonization of the energy sector. The advantages of fuel cells over the incumbent technologies are numerous, for example, high energy efficiency, extremely low pollutant emissions, low noise levels, and modularity. During the years, several kinds of fuel cells have been devised, each characterized by peculiar features, in a way that the potential applications of the technology are nowadays extremely widespread, covering the whole range from portable devices to megawatt-sized power plants.

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Biosensors

An electrochemical biosensor is a self-contained integrated device, which is capable of providing specific quantitative or semi-quantitative analytical information using a biological recognition element (biochemical receptor) which is retained in direct spatial contact with an electrochemical transduction element. in this way, in Electrochemical aptamer-based (E-AB) biosensor the DNA or RNA aptamers are fixed on the interrogating electrode, where a redox reaction is reported by a redox tag. There are several biochemical and electrochemical parameters to optimize signal gain for E-AB biosensors. These biosensors have several advantageos such as excellent calibration characteristics and high selectivity, good reproducibility and stability.

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Electrochemical Sensors

The main aim of the pharmaceutical studies is to serve the human to make them free from illness or prevention of the disease. For the medicine to serve its intended purpose they should be free from impurity, which might harm humans. Moreover, a large number of electroanalytical methods are available for quantification of pharmaceuticals. Electrochemical methods satisfy many of the requirements for such tasks for example selectivity, rapid response, high sensitivity, low cost, simplicity, and accuracy.