Current Transport Modeling of Carbon Nanotubes : Concepts, Analysis, and Design

ISBN-13: 9783639111088 / Angielski / Miękka / 2009 / 124 str.

Jose Mauricio Marulanda

Opis

The purpose of this book is to develop a completecurrent transport model for carbon nanotube field effect transistors(CNT-FETs), applicable in the analysis and design of integratedcircuits. The model is derived by investigating the electronicstructure of carbon nanotubes and by using the basic laws ofelectrostatics in a field effect transistor. By describing the carrierconcentration and charge distribution in carbon nanotubes, analyticalexpressions for the carbon nanotube potential are derived and used toobtain current transport equations for a CNT-FET. Threshold andsaturation voltages expressions are each derived in the processand I-V characteristics for CNT-FETs are calculated usingdifferent combinations of chiral vectors. The voltage transfercharacteristics of basic logic circuits based on complementary CNT-FETsare also studied. A small-signal radio frequency (rf) model isdeveloped and it is shown to have cut-off frequencies in the upperGHz range. Finally, due to the rapid growth of carbon nanotubesas bio- and chemical sensing devices, possible methods tointerpret and analyze CNT-FETs when utilized as biosensors are also presented.