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Urchin-like Ag nanowires were prepared by reacting AgNO3(aq) with Cu metal in the presence of cetyltrimethylammonium chloride and HNO3(aq) on a screen printed carbon electrode at room temperature. The diameters of the nanowires were about 100 nm, while the lengths were up to 10 μm. Cyclic voltammetric experiments using the Ag nanowires as the working electrode showed electrocatalytic H2O2 reduction. The electrode exhibited a high sensitivity of 4705 μA mM-1 mg-1 cm-2 from 50 μM to 10.35 mM and a measurable detection limit of 10 μM in amperometric detection. This is the first report on Ag NWs for non-enzymatic H2O2 sensing.

Addressforcorrespondence:Mr.YuLiangChen,Departmentof ComputerScience,NationalChiaoTungUniversity,1001 University Road, Hsinchu 300, Taiwan. Email: imklchen@gmail.com; Dr. Eric Zhi Feng Liu, GraduateInstitute of Learning & Instruction, National Central University, no. 300 Jung-da Road, Chung-Li City, Taoyuan320, Taiwan. Email: totem@cc.ncu.edu.tw

A novel method called Reciprocating Extrusion is exploited to realize the high potential of Mg-15Al-1Zn alloy to exhibit superior mechanical properties and superplasticity, bypassing the costly and complicated RS+PM route. Such refined alloys exhibit unique high-strain-rate superplasticity at 325 °C and maximum elongation larger than 1610% at 1×10 -2 s -1 . They also possess greater strength/density than 7075-T736 Al alloys.