Hierarchical nanoporous glass with antireflectivity and superhydrophilicity by one-pot etching.
We have developed a hierarchical nanoporous layer (HNL) on silicate glass by a simple one-pot etching method. The HNL has a three-dimensionally continuous spongelike structure with a pore size of a few tens of nanometers on its apparent surface. The pore size gradually decreases from the apparent surface to the HNL-bulk interface. This HNL bestows significant properties to glass: low optical reflectivity that reflects 7% less visible light than nontreated glass and long-persistence superhydrophilicity that keeps its water contact angle at about 5° for more than 1 year. The superhydrophilicity also realizes antifogging and antifouling functionalities.
Faculty of Engineering, Tokyo City University , 1-28-1 Tamazutsumi, Setagaya, Tokyo 156-8557, Japan.
Takuya
T
Fujima
Eitaro
E
Futakuchi
Tomohiro
T
Tomita
Yoshihisa
Y
Orai
Takeshi
T
Sunaoshi