Ag-stabilized few-layer graphene dispersions in low boiling point solvents for versatile nonlinear optical applications

ZHENYU SUNR; NINGNING DONG ; KANGPENG WANG ; DENNIS KÖNIG ; THARAMANI CHIKKA NAGAIAH; MIGUEL D. SÁNCHEZ ; ALFRED LUDWIG ; XIN CHENG; WOLFGANG SCHUHMANN; JUN WANG; MARTIN MUHLER

CARBON

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2013 vol. 62 p. 182 - 192

0008-6223

A solution stabilization strategy that uses an easily removable media is critical to graphene(G) applications. Here, we demonstrate that highly stable graphene dispersions in low boilingpoint solvents such as isopropanol can be readily achieved by the uniform deposition ofAg nanoparticles (NPs) on the surface of graphene. Optimizing the synthesis parameterssuch as ultrasonic intensity, feeding strategy, loading content and precursor concentrationallowed us to tune the particle size and, in this way, the stabilizing effects of the NPs on thedispersions. The as-obtained Ag/G/i-PrOH dispersions exhibit versatile nonlinear opticalproperties suggesting a great potential in nanophotonic applications such as absorber forultrafast lasers and eye protection.