This book covers various facets of nanomaterials and their applications including low-dimensional materials along with discussions on in vitro cell imaging, bioanalyses, UV laser applications of scheelite-type nanomaterials, and nanosized cyanobridged metal-organic frameworks, including high spin transition metal ions. It explains transition metal dichalcogenides and magnetic tunnel junction devices as an alternative to complementary metal-oxide semiconductors. One of the main aims of this book is to grow interest in the atomistic simulation process and characterization of these nanoscale devices. Details the recent advances in the application of nanomaterials for nanoelectronics devices, sensors, and memories Describes the first-principles approach to ultrasensitive electrically doped biosensors Discusses the application of nanomaterials in spintronic devices, specifically magnetic tunnel junction devices with new architectures Covers nanomaterials in water purification and conducting polymer nanocomposites in electrochemical supercapacitors Presents the theoretical background of next-generation MRI contrast agents with nanosized cyanobridged metal-organic frameworks including high spin transition metal ions This book is aimed at researchers and graduate students of materials engineering and nanoelectronics.