Abstract
The paper reports a study on a near-UV blue photoluminescence (PL) in graphene oxide (GO) films prepared by Langmuir-Blodgett (LB)-based method. GO films was reduced into reduced-graphene oxide (rGO) through thermal process at 800 °C. The surface morphology of both GO and rGO is characterized by atomic force microscope (AFM) and scanning electron microscope (SEM). X-ray photoelectron spectroscopy (XPS) analysis shows the largely restoration of graphitic domains in GO after reduction. The photoluminescence (PL) of rGO shows the near-UV blue emission, which is blueshifted along with luminescent decreased as compared to GO. This blueshift and decrease in PL is mainly due to the newly formed sp 2 clusters in rGO, which established percolation pathways between the sp 2 clusters already present.
| Original language | English |
|---|---|
| Pages (from-to) | 18-23 |
| Number of pages | 6 |
| Journal | Applied Surface Science |
| Volume | 345 |
| DOIs | |
| State | Published - 2015 |
Keywords
- Graphene oxide films
- Langmuir-Blodgett method
- Photoluminescence