Akihiro Nagoya

The mechanism by which fluorine (F) diffusion into CaSi₂ leads to a phase transformation from monolayers of silicene (MLSi) to bilayer silicene (BLSi) was revealed using HAADF–STEM observations and DFT calculations.

Nitrogen-functionalized graphene quantum dots (NGQDs) with tailorable optical properties are prepared by a versatile technique, which allows the highest occupied molecular orbital/lowest unoccupied molecular orbital energy levels and energy gaps to be continuously varied. The integration of NGQD layers into the structures significantly improves the performance of optoelectronic devices.

Bright colorful luminescent flexible amino-functionalized graphene quantum dots (af-GQDs)@cellulose nanofiber (CNF)–clay hybrids are potentially applicable in white LEDs.

Amino-functionalized graphene quantum dots (af-GQDs) with discrete molecular weights and specific edges were self-limitedly extracted from oxidized graphene sheet. Their optical properties can be precisely controlled only by the selective and quantitative functionalization at the edge sites. The af-GQDS exhibit bright colorful fluorescence under a single-wavelength excitation.