Image (IMAGE) Science China Press Caption Schematic representation of the formation process of hierarchically mesoporous TiO2 microspheres with single-crystal like pore wall through evaporation-driven oriented assembly (a). SEM image of a single ultramicrotomed, radially-oriented hierarchically mesoporous TiO2 microspheres (b). Inset: Structure models for the radially oriented channels with interchannel pores. TEM image of a single ultramicrotomed, hierarchically mesoporous TiO2 microspheres (c). Inset: The SAED pattern taken from the cylindrical pore bundles region with [010] incidence. Credit ©Science China Press Usage Restrictions Use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.