Photo-induced doping and strain in exfoliated graphene
Main article (936.3Kb) Photoluminescence image after modification (526.3Kb) Microscope image after modification (1.444Mb) Raman data for the D and G peaks (6.306Mb) Raman data for the 2D peak (6.313Mb) AFM data (1.876Mb) Microscope image before modification (1.336Mb) Photoluminescence image before modification (526.3Kb) Raman data for the D and G peaks before modification (4.006Mb) Raman data for the 2D peak before modification (4.003Mb)Show MoreShow Less
Applied Physics Letters
American Institute of Physics
The modiﬁcation of single layer graphene due to intense, picoseconds near-infrared laser pulses is investigated. We monitor the stable changes introduced to graphene upon photoexcitation using Raman spectroscopy. We ﬁnd that photoexcitation leads to both a local increase in hole doping and a reduction in compressive strain. Possible explanations for these effects, due to photo-induced oxygenation and photo-induced buckling of the graphene, are discussed.
CEMPS Research Project Studentship
Copyright © 2013 American Institute of Physics
File "01 flake before modification.jpg" is a microscope picture of a monolayer graphene flake before photomodification. Files "02 Raman map before modification 2D.txt" and "02 Raman map before modification G+D.txt" contain Raman data for the flake before modification. The columns in the files are [X coordinate; Y coordinate; Raman shift; intensity;]. The first file contains data for Raman shifts from 2470 to 2916 cm-1, the second file - data for shifts from 1306 to 1840 cm-1. File “03 PL image before modification.tif” is an Up-converted photoluminescence image of the flake before photomodification. File “04 PL image after modification.tif” is an Up-converted photoluminescence image of the flake after photomodification. File “05 flake after modification.jpg” is a microscope picture of a monolayer graphene flake after photomodification. Files “06 Raman map after modification 2D.txt” and “06 Raman map after modification G+D.txt” are Raman data for the flake after modification. File “07 AFM data.txt” is AFM data for a modified area of a monolayer graphene sample.
Vol. 103 (15), article 151907