[15p-B6-1~16] 17.2 Graphene

▲ [15p-B6-9] Study of plant leaf-derived graphene quantum dots through magnetic force microscopy

〇Chiashain Chuang¹, Masahiro Matsunaga¹, Prathik Roy², Rini Ravindranath³, Huan-Tsung Chang³, Chi-Te Liang³, Nobuyuki Aoki¹ (1.Chiba Univ., 2.Univ. of Canterbury, 3.National Taiwan Univ.)

Keywords:nanocarbon, quantum dot, graphene

The magnetic property in graphene quantum dots (GQDs) comes from the zigzag edge of spin effect due to the theoretical predictions. Plant leaf-derived GQDs have revealed excellent photoluminescent property in addition to unusual magnetic property due to its extreme small nano-scale size (< 10 nm). We have studied the magnetic microstructure of different plant-leaf-derived GQD clusters (100 nm < d < 500 nm) spin-coated on SiO₂/Si chip by magnetic force microscopy (MFM) and observed evidences of magnetic property at room temperature as shown in Fig. 1 in the GQD clusters. These results could potentially lead to carbon-based materials for magnetic information technology, a great advantage for future graphene-based spin manipulation nanodevices.