Schematic illustrations. (a to e) Formation of DT-capped AuNP hybrid films suspended inside TiO2 nanotubes and (f to g) formation of MPA-DT-capped AuNP-imbedded TiO2 nanotubes. Orange spheres represent AuNPs; black lines around AuNPs represent DT thiols; red lines around AuNPs represent MPA-DT thiols. Light blue backgrounds stand for a liquid phase (solvent: toluene or cyclohexane), grey vertical lines for AAO channels, and purple vertical lines for TiO2 nanotubes.
Zhang et al. Nanoscale Research Letters 2012 7:295 doi:10.1186/1556-276X-7-295