Retraction Note: A novel, bioactive and antibacterial scaffold based on functionalized graphene oxide with lignin, silk fibroin and ZnO nanoparticles - Reza Eivazzadeh-Keihan; Ensiye Zare-Bakheir; Hooman Aghamirza Moghim Aliabadi; Mostafa Ghafori Gorab; Hossein Ghafuri; Ali Maleki; Hamid Madanchi; Mohammad Mahdavi (Scientific Reports)