%0 Journal Article %1 WOS:000465160900001 %A Jimenez, Mawin J M %A de Oliveira, Rafael F %A Bufon, Carlos Cesar B %A da Silva, Marcelo A Pereira %A Rodrigues, Varlei %A Gobbi, Angelo L %A Piazzetta, Maria H O %A Alvarez, Fernando %A Cesar, Carlos Lenz %A Jr, Antonio Riul %C TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND %D 2019 %I IOP PUBLISHING LTD %J NANOTECHNOLOGY %K 2D dots; electronics; graphene high-mobility; materials} oxide; quantum reduced transparent {graphene %N 27 %R 10.1088/1361-6528/ab118e %T Enhanced mobility and controlled transparency in multilayered reduced graphene oxide quantum dots: a charge transport study %V 30 %X Reduced graphene oxide (rGO) layers are known to be significantly conductive along the basal plane throughout delocalized sp(2) domains Defects present in rGO implies in disordered systems with numerous localized sites, resulting in a charge transport governed mainly by a 2D variable range hopping (VRH) mechanism These characteristics are observed even in multilayered rGO since the through-plane conduction is expected to be insubstantial. Here, we report on the multilayer assembly of functionalized rGO quantum dots (GQDs) presenting 3D VRH transport that endows elevated charge carrier mobility, ca similar to 236 cm(2) V(-1 )s(-1). Polyelectrolyte-wrapped GQDs were assembled by layer-by-layer technique (LbL), ensuring molecular level thickness control for the formed nanostructures, along with the adjustment of the film transparency (up to 92% in the visible region). The small size and the random distribution of GQDs in the LbL structure are believed to overcome the translational disorder in multilayered films, contributing to a 3D interlayer conduction that enhances the electronic properties. Such high-mobility, transparency-tunable films assembled by a cost-effective method possess interesting features and wide applicability in optoelectronics.

@article{WOS:000465160900001, abstract = {Reduced graphene oxide (rGO) layers are known to be significantly conductive along the basal plane throughout delocalized sp(2) domains Defects present in rGO implies in disordered systems with numerous localized sites, resulting in a charge transport governed mainly by a 2D variable range hopping (VRH) mechanism These characteristics are observed even in multilayered rGO since the through-plane conduction is expected to be insubstantial. Here, we report on the multilayer assembly of functionalized rGO quantum dots (GQDs) presenting 3D VRH transport that endows elevated charge carrier mobility, ca similar to 236 cm(2) V(-1 )s(-1). Polyelectrolyte-wrapped GQDs were assembled by layer-by-layer technique (LbL), ensuring molecular level thickness control for the formed nanostructures, along with the adjustment of the film transparency (up to 92% in the visible region). The small size and the random distribution of GQDs in the LbL structure are believed to overcome the translational disorder in multilayered films, contributing to a 3D interlayer conduction that enhances the electronic properties. Such high-mobility, transparency-tunable films assembled by a cost-effective method possess interesting features and wide applicability in optoelectronics.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND}, author = {Jimenez, Mawin J M and de Oliveira, Rafael F and Bufon, Carlos Cesar B and da Silva, Marcelo A Pereira and Rodrigues, Varlei and Gobbi, Angelo L and Piazzetta, Maria H O and Alvarez, Fernando and Cesar, Carlos Lenz and Jr, Antonio Riul}, biburl = {https://www.bibsonomy.org/bibtex/2804f9ef8b52f1f86489febaad510bca0/ppgfis_ufc_br}, doi = {10.1088/1361-6528/ab118e}, interhash = {9cc208327a5305ae29a4f2e598fd739b}, intrahash = {804f9ef8b52f1f86489febaad510bca0}, issn = {0957-4484}, journal = {NANOTECHNOLOGY}, keywords = {2D dots; electronics; graphene high-mobility; materials} oxide; quantum reduced transparent {graphene}, number = 27, publisher = {IOP PUBLISHING LTD}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Enhanced mobility and controlled transparency in multilayered reduced graphene oxide quantum dots: a charge transport study}, tppubtype = {article}, volume = 30, year = 2019 }