The book explores the emerging field of nanoelectronics technology and its applications, with a focus on advanced semiconductor materials, devices, and circuits essential for VLSI design in IoT applications. It covers both two‑terminal and multi‑terminal devices, emphasizing their simulation, modeling, fabrication, and characterization. This book includes key topics such as novel material systems, band engineering, and modern fabrication techniques. This book serves as a valuable resource for Ph.D., postgraduate, and undergraduate students engaged in nanoelectronics research. It is also suitable as a textbook for elective courses in Electronics and Communication Engineering and Electrical Engineering at universities worldwide.