TABLE OF CONTENTS Nanomaterials have extensive applications in many fields due to their unique properties. In the aspects of improving products of conditional industry, protecting the environment, saving energy and applying advanced science and technology, some achievements have been made. In this chapter, we introduce mainly applications of one-dimensional nanomaterials in some advanced technique fields, such as nanosensors (biosensors, gas sensors and chemical sensors), field emission of carbon nanotubes and field emission devices, light polarization devices of one-dimensional materials, light-bulb filaments made of carbon nanotube yarns, electronic and optoelectronic nanoscale devices.
Nanosensors play a major role in semiconductor processing, medical diagnosis, environmental sensing, and national security. Due to their higher sensitivity and high resolving power, nanosensors have potential applications in microfluid detection, such as harmful gas molecules, individual bacteria and viruses etc. The detection principle is that interaction of target analytes with nanodetection devices produces physical and chemical property changes such as electric, optical, magnetic, mass, pH value etc. changes. In the next paragraph, we will introduce mainly the research progress of nanosensors, including gas sensors, biosensors and chemical sensors.
As we know, the electric properties of SnO 2, especially nano-SnCO 2, are very sensitive to many gases such as CO, O 2, NO 2, and C 2H 5OH. Recently, many researchers study the gas sensors of SnO 2 nanowires or/and nanoribbons. We firstly introduce CO and O 2 sensors of SnO 2 nanowires...
