Nanostructured Transition Metal Oxides In article number 2418407, Hyun Ho Kim and co-workers present a universal and ultrafast method for synthesizing nanostructured transition metal oxides (NTMOs) through the induced solidification of microdroplets, enabling rapid production within a minute. Since NTMOs can be directly grown on substrates in ambient air without requiring high-purity carrier gases, this approach facilitates industrial-friendly mass production.