Top-Down Fabrications of Nanostructures; Growth of Semiconductor Nanowires; Fabrication Techniques of Graphene and Carbon Nanotube Nanstructures; Nanophotonic Light Trapping Theory for Photovoltaic Cells; ZnO Nanowires: Nano Current Generator; Microstructure and Thermoelectric Properties of Nanocomposites; Thermal and Thermoelectric Properties of Nano Materials; Thermal Energy Transport Measurement in Low-Dimensional Nanostructures; Micro- and Nanoscale Thermoelectric and Thermiomic Devices; Novel Electronic Devices Powered by Energy Harvesters