Highly Efficient Broadband Millimeter‐Wave–Absorbing Ultrathin Films

Abstract

Ultrathin film based on a composite of aggregated tetratitanium heptoxide nanocrystals covered by Ga-Ti-Co–substituted ε-iron oxide nanomagnets (Ti4O7@GTC-ε-Fe2O3) absorbs millimeter wave with high-efficiency (99.8%). The cover picture shows that the film behaves like a black hole against millimeter wave. Further details can be found in the article, number 2001473 by Shin-ichi Ohkoshi, and co-workers.