By Yoon K.H., Kang D.H.
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Extra resources for Pb-Based Ferroelectric Nanomaterials
CNTs have received much attention in the recent years for their potential application in several fields of bioengineering, from enhanced cell growth to biosensing, biomanipulation, and drug delivery. The most common synthesis routes for CNTs are CVD processes because they allow largescale production of CNTs with high purity and good yield. To clarify how the CVD process works, we show a schematic diagram of a thermal CVD growth system used for the synthesis of CNTs (Fig. 7). In this example, a carbon-containing precursor is 38 C.
2 Chemical Vapor Deposition The CVD process is now probably the most common of all bottom-up approaches. It is used today to grow structures, like nanotubes, nanowires, and nanoparticles aided by several different types of chambers and growth-enhancing methods. , a silicon wafer or a quartz slide) (Jensen 1989). The presence of a catalyst, either predeposited on the substrate or provided in the gas feedstock, activates the chemical reaction between the substrate surface and the gaseous precursor.
However, extensive research effort and testing of these nanoscale systems would be required before the actual use in treatment of pathological conditions and regeneration medicine can be efficiently implemented. Rapidly growing area of nanotechnology supplies biologists and biomedical engineers with new tools to control living cell functions and behavior via precise design of cellular environment at nanoscale level. While the fundamental knowledge is still being accumulated on how cells interact with their natural or artificial milieu, the molecular mechanisms and processes that govern the cell fate in the nanoworld remain to be elucidated.