... samples B and C decrease to 9.99 and 7.99 V/lm, respectively. With decreasing the wall thick-nesses of CdS nanotubes, the Ethdecreases. Ethfor samplesA, B, and C are 14.92, 13.44, and 11.27 ... photosensitivity and its band gapenergy (2.41 eV) appears in the visible spectrum leading tomany commercial or potential applications in light-emit-ting diodes, solar cells, field emitter, and other ... and various porous mem-branes including anodic aluminum oxide, polycarbonate, and mesoporous silica. [9–12] In fact, the CdS nanotubesprepared by above-mentioned methods are always freestanding,...