The prototype chips use two materials: molybdenum disulfide and graphene. The method apparently works with materials that combine elements from group six of the periodic table, such as chromium ...
There are 2D materials that are good semiconductors, though, like molybdenum disulfide or tungsten diselenide. “They offer very stable electrical performance even below one nanometer,” Kim said.
"The high-mobility n-type molybdenum disulfide transistors, unlike conventional epitaxially-grown quantum well system, are made by simply stacking several van der Waals materials in sequence ...
Dr. Zheng Jian, the first author of the paper, is shown demonstrating the printing of molybdenum disulfide flakes from a solution of the exfoliated flakes. Disclaimer: AAAS and EurekAlert!