It is a pleasure to come to a final editorial for the special issue on simulation, experimental studies, and applications of carbon nanotubes or graphenes in engineering and medicine. The issue of Vol. 3 No. 1 publishes four papers on this topic while the current Vol. 3 No. 2 issue hosts the remaining four papers. A wide range of fundamentally theoretical, computational, and experimental topics on modeling and applications of the two materials are covered in the special issue. It is my honor to highlight major contributions of each paper hereinafter.

In the issue of No. 1, the first work by Derouiche and Mohamed is about the fabrication of a flexible organic solar cell. The PEDOT:PSS (poly(3,4-ethylene dioxythiophene) poly(4-styrenesulfonate), doped with EG (ethylene glycol) and single wall carbon nanotubes, is used as conductive transparent electrode rather than electron blocking layer. The...

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