The book covers the latest advancements in the field of nanoelectronics, interaction of light with matter, optical properties, surface plasmons, nanophotonic and plasmonic applications, nanomaterials engineering in nanoelectronics, fabrication techniques, and applications. It presents the structure properties and device applications of carbon nanotubes, graphene, and silicene. The book further includes topics on perovskites and applications, quantum dots for optoelectronic, sensing devices, computing applications, and advanced applications in diagnostic and therapeutic tools. This book: • Introduces topics on quantum phenomenon in nanoelectronics, transistors in modern computing, spintronic devices, flexible and wearable electronics, and case studies and includes topics on development of hybrid material of one- dimensional (1D) and 2D carbon in nanomedicine, computed tomography, ultrasound, and stapled peptides drug. • Presents physical and electrical properties of nanoscale materials, applications of carbon nanotubes such as batteries, supercapacitors, biosensors, photodetectors, and field emission sources and topics on the surface plasmon resonance, nanolasers, nanoantennas, photonic crystals, and luminescent materials. • Discusses quantum dots, quantum electronic devices, nanosensors, quantum computing, device applications of perovskite materials, spintronics, drug delivery, and gene therapy applications and the scaling laws in nanoelectronics, materials for nano- FET, high- speed computing, and advanced nanoscale FET architectures, • Highlights recent developments in the field of nanoscale devices based on graphene and silicene such as biosensing and gas sensing, thermoelectric devices, and optoelectronic applications. • Explains the basic quantum theory, pizoelectricity in zinc oxide quantum dots, and nanosensing, includes the topics on data- storage and quantum logic gates. It is primarily written for senior undergraduates, graduate students, and academic researchers in the fields including physics, computers, nanoelectronics, electrical engineering, electronics and communications engineering, nanoscience, and nanotechnology.