10. Enhanced functionalities by nanomaterials, nanoengineering and nanofabrication
Omega 2,11/06/2015, 12/12/17 13:30 - 12/12/17 15:00
The main advantages of nanomaterials are not only the possibility of packaging many functional units in high density, but also the enhanced functionality when the reactive surface area is maximized against the volume of the material, as it happens when the dimensions shrink. Materials with structure at the nanoscale often have unique optical, electronic, or mechanical properties. Nanofabrication means design and manufacture of devices with dimensions measured in nanometers. The top-down methods include scaling down until the desired structure emerges, while the bottom-up scheme involves the assembly of a chip atom-by-atom or by self-assembly.
Typical nanoscale fabrication techniques include chemical vapour deposition to produce very pure, high-performance films; molecular beam epitaxy for depositing highly controlled thin films; atomic layer epitaxy for depositing one-atom-thick layers on a surface, as used in current transistor manufacturing; atomic force microscope lithography, where the tip of AFM is “dipped” into a chemical fluid and then used to “write” on a surface; and nanoimprint lithography for creating nanoscale features by printing or stamping. Some of these techniques can be used in roll-to-roll processing for high-volume production of nanoscale devices.
In this session, various nanofabrication technologies used for production of actual devices together with their applications are presented.