The present book deals several aspects starting with introduction, computational methodology and details of new results. In first chapter, details of nanotechnology emphasizing on different structures, properties and applications of nanotubes with literature review are well documented. Second chapter accounts for the details of computational methods used to study the different properties of materials. Results of computational study are presented in third, fourth and fifth chapters. The findings, presented in this book, have potential in understanding of hydrogen storage properties of SiC nanotubes and its further utilizations in computational and experimental work in future.