This title appears in the Scientific Report : 2013 

Transistor Functions Based on Electrochemical Rectification
Liu, Yaqing
Wolfrum, Bernhard / Hüske, Martin / Offenhäusser, Andreas / Wang, Erkang / Mayer, Dirk (Corresponding author)
Bioelektronik; PGI-8
Bioelektronik; ICS-8
Angewandte Chemie / International edition, 52 (2013) 14, S. 4029 - 4032
Weinheim Wiley-VCH 2013
Journal Article
Sensorics and bioinspired systems
Physics of the Cell
Please use the identifier: in citations.
Electronic elements built from organic semiconductors, such as molecular transistors, have significant potential for technical innovations and mass use owing to their flexible mechanical properties, cost-effective processability, and tuneable optical properties.1 Self-assembled monolayer field-effect transistors (SAMFET) are among the latest developments of novel microelectronic devices.2 In SAMFETs, charge carriers laterally pass through a molecular layer (parallel to substrate) and exhibit transistor behavior, which can be modulated by an electrostatic gate. The charge transport properties of the SAMFETs are affected by the length of the channel.3, 4 Herein, we present a novel chip-based molecular transistor concept, which is based on charge-transfer processes across a monolayer of molecules perpendicular to the sample surface plane. To this end, redox active molecules are adsorbed to a collector electrode (CE) acting as electron-transfer mediators. A two-step charge transfer between solid interdigitated array electrodes (IDA), charge transfer mediator, and liquid-phase redox probe yields a unidirectional current response. An adsorbate-free generator electrode (GE) can be used to modulate the unidirectional currents, resulting in a transistor-like behavior. The electrochemical transistor-like system exhibits high current outputs at a low-voltage operation, high on/off switching current ratios, and is operated as a 24-bit code generator.