tailieunhanh - CARBON NANOTUBES FROM RESEARCH TO APPLICATIONS_2

Since their discovery in 1991, carbon nanotubes have been considered as one of the most promising materials for a wide range of applications, in virtue of their outstanding properties. During the last two decades, both single-walled and multi-walled CNTs probably represented the hottest research topic concerning materials science, equally from a fundamental and from an applicative point of view. There is a prevailing opinion among the research community that CNTs are now ready for application in everyday world. This book provides an (obviously not exhaustive) overview on some of the amazing possible applications of CNT-based materials in the near future | Part 2 Carbon Nanotube-Based Composite Materials 12 Transparent Conductive Carbon Nanotube Binder Hybrid Thin Film Technology Joong Tark Han Hee Jin Jeong Seung Yol Jeong and Geon-Woong Lee Korea Electrotechnology Research Institute Republic of Korea 1. Introduction Carbon nanotube CNT -based transparent conductive film TCF technologies have potential applications in electrostatic dissipation ESD electromagnetic interference EMI shielding and transparent film heating as well as in the development of alternative electrode materials for touch panels and e-papers in display technologies solar cells flexible electronic devices automobiles and optical devices. In particular single-walled carbon nanotube SWCNT network films have been intensively studied for the development of alternative transparent conductive electrodes due to their excellent electrical properties the flexibility of SWCNT networks and their solution processability under ambient conditions Wu et al. 2004 Kaempgen et al. 2005 Zhou et al. 2006 . For such applications the optoelectronic properties of SWCNT-based TCFs should optimally be controlled by the material properties of the nanotubes including purity diameter chirality defects metallicity and doping level Geng et al. 2007 . Organic materials such as conjugated polymers block copolymers polyelectrolytes pyrenes DNA and so on may also be used in applications because CNTs display good dispersion and stabilization in a variety of solvent media and polymer matrices. To maintain good electrical and mechanical properties as well as environmental stability . thermal and hydrothermal stability SWCNTs must be hybridized or top-coated with binder materials such as cross-linkable polymers ceramic sols or metal oxide sols. The electrical properties of SWCNT binder hybrid thin films are sensitive to their surroundings and to the interfacial structure of the network film and the interfacial interactions or interfacial tension among nanotubes binder materials and