فهرس المقالات Sol–gel synthesis حرية الوصول المقاله صفحة الملخص نص كامل 1 - Effect of polyethylene glycol and propyltrimethoxysilane on structural and optical properties of zinc oxide nanoparticles synthesized by sol–gel process Djahnit Leila López-González Mar Belhadj Fatima Naitbouda Abddelyamine Benosmane Ali Haddaoui Nacereddine 10.1007/s40094-018-0303-2