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... rectorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. and possible applications investigated. MacroCuO with graphene was successfully used as supercapacitor electrode material. Electrochemical measurements of this system revealed the maximum specific capacitance, energy density and power density of 417 F g 1 , 58 Wh kg 1 and17.85 kWkg -1 , respectively at a current density of 0.9 Ag -1 . Graphene/silver nanoparticle/polypyrole modified glassy carbon electrode (Gr-AgNPs-PPy-GCE) was synthesized and its use as a supercapacitor electrode is under investigation. Graphene (Gr)gold nanoparticles (AuNP)-Nafion and silver nanoparticle (AgNP)/graphene oxide (GO) composites have been successfully synthesized and characterized. These materials were investigated as supercapacitor electrodes with different electrolytes. AuNP-Nafion was found to be useful for sensing the pharmaceutical molecule Sumatriptan, and AgNP/GO shows high sensitivity in detection of Arsenic. SUBJECT TERMS nano materials, supercapacitor, energy 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT SAR 18. NUMBER OF PAGES 15 19a. NAME OF RESPONSIBLE PERSON