title: Crystalline nanoporous metal oxide thin films by post-synthetic hydrothermal  transformation: SnO2 and TiO2.
authors.affiliation: Lab of Functional Polymer Materials, College of Chemistry, Nankai University, Tianjin, People's Republic of China.
authors.forename: Shaofeng
authors.initials: S
authors.lastname: Shao
authors.forename: Momtchil
authors.initials: M
authors.lastname: Dimitrov
authors.forename: Naijia
authors.initials: N
authors.lastname: Guan
authors.forename: Ralf
authors.initials: R
authors.lastname: Köhn