How can I upload conductivity data for graphene?

I would like to upload my data as per page 7 on pdf below, however the dispersion list button does not active for me,would it be due to software which i am using? would you please let me know what i am required to do, in order to active the button.

I appreciate your cooperation.

How can I upload conductivity data for graphene?

Sorry, no pdf file is visible. Did you intend it to be a link, or an attachment?

sorry, i have some problemAnastasia-Simulation_of_graphene-based_nano-antennas.pdf

sorry, i have some problem with attached the pdf so i just take picture and add it.