Research ArticleOpen accessPhrase in the titleSynthesis of Graphene Oxide via Liquid Exfoliation Using Self-Custom-Made Tweeter Piezoelectric Ultrasound Generator and Assisted by Surfactant from Commercial DetergentAchmad Ainul Fikri, Aminah Nur Aisyah, Suhufa Alfarisa, Wipsar Sunu Brams DwandaruAmerican Journal of Applied Sciences, Vol. 13, Issue 11 · 3 Nov 2016 · 7,251 accessesView PDFCite