This book presents recent developments and fascinating attributes of electronic-nose (E-nose) technology based on advanced nanostructured materials that are compatible with modern semiconductor fabrication technology. The new trend in these nanostructured materials includes metal oxide nanostructures, 2D materials, graphene, and other carbon-based nanostructures. These versatile materials with remarkable electronic, mechanical, electrical, thermal properties, and potential e-nose in a wide range of fields are discussed in the book. Close attention is given to problems connected with stability, selectivity, and functionalizing of e-nose devices and deposited materials. The field of sensors is indeed in fast and consistent growth. This book consolidates information on each and every aspect of these novel materials, their gas sensing mechanisms, engineering, and e-nose devices covering the entire spectrum of up-to-date literature citations, current market, and patents in a very detailed manner. Moreover, in the past few years, tremendous advances have been made in experimental and theoretical studies on various properties of these materials. In summary, this book makes an attempt to provide in-depth study of recent advances and focuses on current problems related to selectivity and stability of sensor devices. The book is interesting to all materials professionals and researchers from universities and national laboratories working in the field of nanostructured materials-based gas sensors.

The hydrogen Lyman-alpha line is of utmost importance to many fields of astrophysics. This UV line being conveniently redshifted with distance to the visible and even near infrared wavelength ranges, it is observable from the ground, and provides the main observational window on the formation and evolution of high redshift galaxies. Absorbing systems that would otherwise go unnoticed are revealed through the Lyman-alpha forest, Lyman-limit, and damped Lyman-alpha systems, tracing the distribution of baryonic matter on large scales, and its chemical enrichment.

This book builds bridges between two yet separated branches of theoretical and mathematical chemistry: Chemical Graph Theory and Electronic Structure Calculations. Although either of the fields have developed their own techniques, problems, methods, and favorite benchmark cases independent from each other, the authors have managed to bring them together by using the localization-delocalization matrix (LDM). The LDM is a novel molecular descriptor that fingerprints a molecule by condensing the complicated electronic information in one, mathematically manageable, object. In this book, the authors introduce the readers to modeling techniques based on LDMs. Their technique offers a high accuracy as well as robust predictive power, often dramatically surpassing the potential of either of the constituting methods on their own.