Materials scientists at Rice University and the University of Pennsylvania are calling for a collective, global effort to fast-track the mass production of 2D materials like graphene and molybdenum disulfide.
In a perspective article published online in Materials Today, journal editor-in-chief Jun Lou and colleagues make a case for a focused, collective effort to address the research challenges that could clear the way for large-scale mass production of 2D materials.
Lou and fellow Rice materials scientists Ming Tang, Jing Zhang and Fan Wang joined Penn's Vivek Shenoy in describing the potential transformation in 2D materials technology that could result from a systematic, communitywide effort to map the shapes of the 2D crystals that are being grown in labs worldwide via a process known as chemical vapor deposition (CVD).
"Like snowflakes in nature, 2D crystals exhibit a rich variety of morphologies under different growth conditions," they wrote.
Mapping these unique crystal patterns and compiling the maps in a global database, alongside the recipes for creating each pattern, could unlock a wealth of information "for understanding, diagnosing and controlling the CVD process and environment for 2D material growth," the researchers wrote.
CVD is a commonly used process for creating thin films, including commercially important materials in the semiconductor industry. In a typical CVD reaction, a flat sheet of material called a substrate is placed in a reaction chamber and gases are flowed through the chamber in such a way that they react and form a solid film atop the substrate.
One goal of the field is developing computer software that can accurately predict the properties of a thin film that will result from the mixing of specific reactant gases under specific conditions. Creating such models is complicated by both an incomplete understanding of the physical and chemical processes that take place during CVD and by the existence of dozens of CVD reactor formats.