Photoinduced charge transfer from Carbon Dots to Graphene in solid composite

Carbon Dots Dispersed on Graphene/SiO2/Si: A Morphological Study

“…These features are compatible with the PL recorded by Raman spectra as reported also recently in Ref. .…”

“…These features are compatible with the PL recorded by Raman spectra as reported also recently in Ref. [35]. Figure 4a shows a representative optical image of CDs/Gr systems deposited on SiO 2 /Si substrate, the deposit appears nonhomogeneous and regions with a "cyan" tinge are visible.…”

Dynamic Modification of Fermi Energy in Single-Layer Graphene by Photoinduced Electron Transfer from Carbon Dots

“…In regard to these Gr composites, most of literature works concern the interaction of graphene with metal nanoparticles [24][25][26][27], transition metal oxides [28,29] or transition metal calchogenide quantum dots [12], and graphene oxide-mainly investigated in liquid phase. Despite that such composite nanomaterials are of cross-disciplinary interest for application in photocatalysis, molecular detection, and microelectronics, most of them are hindered by severe practical limitations, such as lack in visible emission, toxicity of materials, and inapplicability in solid-state microelectronics.In recent preliminary studies, we have explored a new type of all-carbon nanocomposite, in order to overcome the above cited restrictions [30,31]. In particular, Gr fabricated by chemical vapor deposition (CVD) has been selected for its high conductive properties and good implementation for solid state devices [32].…”

“…More specifically, the photocycle of CDs involves both their carbon core and their surface passivation groups [37], and the consequent exposure of negative charge at the CDs surface enables charge transfer mechanisms with other close ions [38][39][40][41] or molecular species [42,43]. We proposed a similar process in order to describe the interaction between CDs and Gr supported on SiO 2 in a solid composite, wherein the CD emission efficiency was affected by the surface of deposition [30], noting also the lack of structural modification of Gr decorated with CDs [31] and the stability of CDs to soft thermal treatment [30]. Based on the above considerations, the integration of such a composite system in microelectronic devices would present several advantages compared to other solution: inexpensive and nontoxic nanoparticles as optically active layer, and CVD Gr-which allow a better implementation in solid state technology compared to other synthesis of this nanomaterial-as conductive layer.In the present work, we deepen the interaction between CDs and Gr by the simultaneous investigation of the electronic properties of both materials and the role of graphene doping.…”

“…In recent preliminary studies, we have explored a new type of all-carbon nanocomposite, in order to overcome the above cited restrictions [30,31]. In particular, Gr fabricated by chemical vapor deposition (CVD) has been selected for its high conductive properties and good implementation for solid state devices [32].…”