Abstract

We report on the effect of compressive stress on the optical properties of graphene oxide using a wet ball milling technique. For this purpose, graphene oxide was prepared using the modified Hummer’s method and subsequently processed with wet ball milling. X-ray diffraction infers a peak at 9.655° which is the allowed reflection for the graphene oxide. The Williamson-Hall method is used to quantify the strain on the 10 hrs and 20 hrs ball milled graphene oxide samples and is found to be 4.2% and 4.8% respectively. Although we applied strain on the graphene oxide, it actually helped to reduce the defects which are confirmed by the intensity drop-off of D-peak in Raman spectroscopy. Indeed there exists a band gap alteration of 0.14 eV for an applied compressive strain of ~4.8%, hinting that the reduction in oxygen functional groups and the same is confirmed with the Fourier Transform Infrared Spectroscopy (FTIR). The present results would be helpful in developing graphene oxide based flexible memories and optoelectronic devices.

Highlights

  • Tuning the optical properties of various materials has been of great interest due to their potential applications in optoelectronic devices [1]

  • Salient features of the present manuscript are 1) preparation of graphene oxide (GO) uses modified Hummer’s method and characterization of various ball milled GO samples for their structural and optical properties; 2) a change in the band gap value of ~0.14 eV is evident for an applied compressive strain of 4.8%, hinting that the reduction in oxygen related functional groups and the same is consistent with the Fourier Transform Infrared Spectroscopy (FTIR) results; 3) upon ball milling, decrease in D peak intensity pertinent to Raman studies indicates the reduction in defects

  • It is to be noted that the peak intensity at 9.655 ̊ decreases which may be ascribed to decrease in oxygen related functional groups upon ball milling

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Summary

Introduction

Tuning the optical properties of various materials has been of great interest due to their potential applications in optoelectronic devices [1]. (2016) Tuning Optical Properties of Graphene Oxide under Compressive Strain Using Wet Ball Milling Method. Salient features of the present manuscript are 1) preparation of GO uses modified Hummer’s method and characterization of various ball milled GO samples for their structural and optical properties; 2) a change in the band gap value of ~0.14 eV is evident for an applied compressive strain of 4.8% (milling time of 20 hrs), hinting that the reduction in oxygen related functional groups and the same is consistent with the Fourier Transform Infrared Spectroscopy (FTIR) results; 3) upon ball milling, decrease in D peak intensity pertinent to Raman studies indicates the reduction in defects

Experimental
Results and Discussions
Conclusion

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