Langmuir 2010, 26:7153–7156.CrossRef 40. Thavasi V, Renugopalakrishnan V, Jose R, Ramakrishna S: Controlled electron injection and transport at materials interfaces in dye sensitized solar cells. Mater Sci Eng R 2009, 63:81–99.CrossRef 41. Saito M, Fujihara S: Large photocurrent generation in dye-sensitized ZnO solar cells. Energy Environ Sci 2008, 1:280–283.CrossRef

42. Juan B: Theory of the impedance of electron diffusion and recombination in a thin layer. J Phys Chem B 2002, 106:325–333.CrossRef 43. Wang KP, Teng H: Zinc-doping in TiO2 films to enhance electron transport in dye-sensitized solar cells under low-intensity illumination. Phys Chem check details Chem Phys 2009, 11:9489–9496.CrossRef 44. Chang WC, Cheng YY, Yu WC, Yao YC, Lee CH, Ko HH: Enhancing performance

of ZnO dye-sensitized solar cells by incorporation of multiwalled carbon nanotubes. VS-4718 Nanoscale Res Lett 2012, 7:166–172.CrossRef 45. Adachi M, Sakamoto M, Jiu J, Ogata Y, Isoda S: Determination of parameters of electron transport in dye-sensitized solar cells using electrochemical impedance spectroscopy. J Phys Chem B 2006, 110:13872–13880.CrossRef 46. Lee CH, Chiu WH, Lee KM, Yen WH, Lin HF, Hsieh WF, Wu JM: The influence of tetrapod-like ZnO morphology and electrolytes on energy conversion efficiency of dye-sensitized solar cells. Electrochim Acta 2010, 55:8422–8429.CrossRef 47. Wang Q, Zhang Z, Zakeeruddin SM, Grätzel M: Enhancement of the performance of dye-sensitized solar cell by formation of shallow transport levels under visible light illumination. J Phys Chem C 2008, 112:7084–7092.CrossRef Competing Chlormezanone interests The authors declare that they have no competing interests. Authors’ contributions WCC designed

and performed the experiment, analyzed the data, and helped draft the manuscript. CML helped draft the manuscript. WCY conceived the study, participated in its design and coordination, and helped with the manuscript preparation. CHL helped draft the manuscript. All authors read and approved the final manuscript.”
“Background Several selleck therapeutic anticancer drugs, although pharmacologically effective in cancer treatment, are restricted in their clinical applications because of their severe toxicity [1]. The severe toxicity is usually due to the lipid solubility of most of the anticancer drugs (>70%) and the therapeutic doses that are often very high [2]. Doxorubicin is one of the most successful drugs for targeting a broad range of cancers. Nevertheless, its clinical use is hindered by its side effects, which include cardiotoxicity and acquired drug resistance. To overcome these complications, researchers have placed an emphasis on developing nanoscale anticancer drug carriers for improving therapeutic efficacy in addition to reducing unwanted side effects [3].