Customizable 3D-printed architecture with ZnO-based hierarchical structures for enhanced photocatalytic performance.

ZnO-based hierarchical structures including nanoparticles (NPs), nanorods (NRs) and nanoflowers (NFs) on a 3D-printed backbone were effectively fabricated via the combination of the fused deposition modelling (FDM) 3D-printing technique and hydrothermal reaction. The photocatalytic performance of the ZnO-based hierarchical structures on the 3D-backbone was verified via the degradation of the organic pollutant methylene blue, which was monitored by UV-vis spectroscopy. The new photocatalytic architectures used in this investigation give an effective approach and wide applicability to overcome the limitation of photocatalysts such as secondary removal photocatalyst processes.

Corrigendum: Demonstration of nanoimprinted hyperlens array for high-throughput sub-diffraction imaging.

This corrects the article DOI: 10.1038/srep46314.

Demonstration of nanoimprinted hyperlens array for high-throughput sub-diffraction imaging.

Overcoming the resolution limit of conventional optics is regarded as the most important issue in optical imaging science and technology. Although hyperlenses, super-resolution imaging devices based on highly anisotropic dispersion relations that allow the access of high-wavevector components, have recently achieved far-field sub-diffraction imaging in real-time, the previously demonstrated devices have suffered from the extreme difficulties of both the fabrication process and the non-artificial objects placement. This results in restrictions on the practical applications of the hyperlens devices. While implementing large-scale hyperlens arrays in conventional microscopy is desirable to solve such issues, it has not been feasible to fabricate such large-scale hyperlens array with the previously used nanofabrication methods. Here, we suggest a scalable and reliable fabrication process of a large-scale hyperlens device based on direct pattern transfer techniques. We fabricate a 5 cm × 5 cm size hyperlenses array and experimentally demonstrate that it can resolve sub-diffraction features down to 160 nm under 410 nm wavelength visible light. The array-based hyperlens device will provide a simple solution for much more practical far-field and real-time super-resolution imaging which can be widely used in optics, biology, medical science, nanotechnology and other closely related interdisciplinary fields.