摘要
Ⅰ. INTRODUCTION As nanosolid is compacted from ultrafine particles, a large volume fraction of the material is constituted by grain boundaries or interfaces. Because of the small size and boundary effects, the properties of nanosolids are superior to those of the traditional materials with the same compositions. The gas sensing properties of"nano SnO<sub>2</sub> solids are high sensitivity and rapid respgnding speed, which increase with the decrease of crystal grain size.
基金
Project supported by the Laboratory of Internal Friction and Defects in Solids, Academia Sinica
