Nanostructures and Nanomaterials: Characterization and Properties
Nanostructures and Nanomaterials: Characterization and Properties. Instructors: Prof. Anandh Subramaniam and Prof. Kantesh Balani, Department of Materials Science and Engineering, IIT Kanpur. This course will provide an overview of nanostructures evincing their fascinating properties (mechanical, optical, electromagnetic, chemical, and biological) unseen otherwise. The hierarchical development from nano to macro length scale, and its adoption in nature (biomimicking) will also be discussed. Understanding the change in crystal structure and defects therein as one goes from bulk to nano length scale will be utilized to construct structure-mechanism-property-performance maps. Thermodynamics resulting from the size effects at nano-length scales will also be considered. Structural, phase, microstructural and mechanical characterization techniques will be dealt in detail.
(from nptel.ac.in)
Lecture 25 - Optical Properties of Nanomaterials, Properties of Core-shell Nanostructures
Optical properties of nanomaterials: Size effect of optical properties; Semiconductor nanoparticles and films: Effective bandgap, Blue shift in absorption, Photoluminescence; Properties of core-shell nanostructures: Fluorescence from core-shell quantum dots; Colour metallic nanoparticles: Bulk and surface plasmons, Effect of shape of the nanocrystal; Properties of core-shell nanostructures: Metal on dielectric; Negative refractive index materials (structures): Metamaterials.