Journal Article 4 bandgap modulation 2D materials 1 Raman spectroscopy 1 alpha-germanium nanolayers 1 density functional theory 1 gram-scale preparation 1 plus ... graphene nanoribbon field-effect transistors (GNRFETs) 1 graphene nanoribbons 1 liquid-phase exfoliation 1 mechanical strain 1 metal–organic framework (MOF) 1 statistical trend analysis 1 substituent effect 1 surface adsorption 1 violet phosphorus 1 moins ...