In this chapter, the main scanning probe microscopy-based methods to measure the transport properties in advanced polymer-Carbon Nanotubes (CNT) nanocomposites are presented. The two major approaches to investigate the electrical and charge transport (i.e., Electrostatic Force Microscopy [EFM] and Current-Sensing Atomic Force Microscopy [CS-AFM]) are illustrated, starting from their basic principles. First, the authors show how the EFM-related techniques can be used to provide, at high spatial resolution, a three-dimensional representation CNT networks underneath the surface. This allows the studying of the role of nanoscopic features such as CNTs, CNT-CNT direct contact, and polymer-CNT junctions in determining the overall composite properties. Complementary, CS-AFM can bring insight into the transport mechanism by imaging the spatial distribution of currents percolation paths within the nanocomposite. Finally, the authors show how the CS-AFM can be used to quantify the surface/ bulk percolation probability and the nanoscopic electrical conductivity, which allows one to predict the macroscopic percolation model.
|Title of host publication||Handbook of Research on Nanoscience, Nanotechnology, and Advanced Materials|
|Number of pages||33|
|ISBN (Print)||146665824X, 9781466658240|
|Publication status||Published - Mar 31 2014|
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)