Stretchable graphene-based materials of high conductivity

 The application of graphene based materials in the area of stretchable electronics has driven enormous attention, especially in terms of the design of stretchable structures. This thesis has finely tuned the synthesis process of reduced graphene oxide (rGO), focused on the introduction of a thermo-mechanical shrinking process to fabricate wrinkled rGO structure as stretchable conductors and finally presented another potential application of wrinkled rGO structure.

Stretchable Graphene: A Close Look at Fundamental Parameters through Biaxial Straining

Tunable biaxial stresses, both tensile and compressive, are applied to a single layer graphene by utilizing piezoelectric actuators. The Gruneisen parameters for the phonons responsible for the D, G, 2D and 2D' peaks are studied. The results show that the D peak is composed of two peaks, unambiguously revealing that the 2D peak frequency (omega(2D)) is not exactly twice that of the D peak (omega(D)). This finding is confirmed by varying the biaxial strain of the graphene, from which we observe that the shift of omega(2D)/2 and omega(D) are different. The employed technique allows a detailed study of the interplay between the graphene geometrical structures and its electronic properties.