This "Journal of Nano Research" volume includes peer-reviewed articles reflecting the practical research results in the synthesis and properties analysis of nanomaterials and nanoparticles for various engineering goals - catalytic and photocatalytic applications, photovoltaic and electrochemical use in solar cells and energy storage devices, for applications as a biocompatible fluid for magnetic hyperthermia therapy and micro- and optoelectronics production. The presented collection will be helpful to specialists from many branches of engineering whose activity is related to nanomaterials and nanotechnologies.