Naoto Koshizaki

TL;DR: As-prepared carbon dots exhibited visible, tunable and stable photoluminescence (PL), and XPS analysis showed that the increased oxygen concentration might be concerned with the origin of PL.

TL;DR: A hexagonal-close-packed, hierarchical amorphous TiO2 nanocolumn array was fabricated by pulsed laser deposition (PLD) using a PS colloidal monolayer as a template under a high pressure (6.7 Pa) of background oxygen gas, suggesting that the surface area of theTiO2 is preferable to its crystal structure for enhancing photocatalytic activity.

TL;DR: The intensity of the defect emission caused by oxygen vacancies of ZnO rapidly decreased, while the exciton emission intensity increased, which indicates that anionic oxygen in the amphoteric surfactant molecules effectively occupied the oxygen vacancy sites at theZnO nanoparticle surface due to charge matching with the positively charged ZNO nanoparticles.

TL;DR: In this paper, a general synthesis of inorganic single-crystalline hollow spheres has been achieved through a mechanism analogous to the Kirkendall effect, based on a simple one-step laser process performed at room temperature.

TL;DR: Spherical particles are of great interest because of their potential to obtain interesting and useful functionalities in many fields of application, such as photonic crystals, biomedicine, sensing,alysis, environmental remedies, and solar cells.