Atom-thin materials: handle with care... and cling film Kitchen cling film enables large, atom-thin material sheets to be transferred onto patterned surfaces without cracking, simplifying 2D device fabrication. Since the height of these materials is negligible, they are called 2D materials. In the 2D materials case, these flakes are smaller than the width of a human hair – far too small for most practical devices. We were trying to replicate results from a research group in Japan, but it turned out kitchen cling film in Europe is made of a different polymer. With large-area 2D material transfer now within reach, applications that were previously difficult to pursue become feasible.