Direct imprinting of ordered and dense TiO2 nanopore arrays by using a soft template for photovoltaic applications

- Ordered TiO2 nanopore arrays can be imprinted by using a PMMA/PDMS template.
- Vacuum-assisted infiltration ensures complete filling of PMMA into AAO pores.
- Freeze-drying assists in obtaining PMMA nanorods with higher aspect ratio.
- The diameter of the imprinted TiO2 nanopores can be adjusted from 30 nm to 300 nm.
- The imprinted TiO2 nanopore arrays can enhance solar cell performance.