Two dimensional electronic systems offer rich possibilities for new phenomena and phases. Single atom thick materials composed of group IV atoms other than carbon offer exceptional  tunability of electronic materials. The atomic sheets readily bond atoms covalently, allowing controllable changes in the electronic structure of the sheet that lead to a rich variety of electronic characteristics. IRG-2 brings together diverse experience in materials development, 2D electronic properties, patterning, optical and transport characterization together with theory and modeling to bring these materials to fruition and study their rich physical properties.