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Abstract: Silver, titanium, nickel, and aluminum nanowire arrays with diameters from 90 to 110 nm were prepared on AAO templates by laser molecular beam epitaxy. On the several kinds of nanowire arrays, high-quality surface-enhanced Raman scattering (SERS) spectra of probe molecules of the red dye Sudan II (C18H16N2O) were obtained. In particular, the SERS spectrum of Sudan II on an aluminum nanowire array is reported for the first time. [Copyright &y& Elsevier]

In this work, carbon-coated manganese silicate (MnSiO 3 /C) nanocomposite with excellent cycling stability was fabricated via a cost-effective process. The carbon coating followed with a CO 2 heat treatment process on the manganese silicate results in mixed-valent hierarchically-porous nanoparticles, which tightly connects with an ultrathin (∼1.5 nm) and ordered carbon coating layer. This composite features rectangular-like cyclic voltammetry curve with two couples of redox peaks, suppressing the irreversible reactions and thus providing a broad and stable working voltage. By fitting the CV curves, the MnSiO 3 /C demonstrates a capacitive energy-storage behavior. The as-assembled activated carbon//MnSiO 3 /C asymmetric supercapacitor in 1 M Na 2 SO 4 aqueous electrolyte is found to have excellent cycling stability, with 95.5% retention of initial after 10,000 cycles. This device could deliver 25.8 W h kg−1 energy density at the power density of 1 kW kg−1 with ∼10 mg cm−2 high mass loading, suggesting a bright prospect in practical application. [ABSTRACT FROM AUTHOR]