Figure 6.

a SEM, b TEM image, c XRD pattern (JCPDS Card No. 14-0072) of the as-prepared Ag2S hollow structure, d PL emission spectrum of Ag2S shell obtained under an ultraviolet excitation at 365 nm

Wu et al. Nanoscale Research Letters 2010 5:1779-1787   doi:10.1007/s11671-010-9711-1