Spontaneous Bulk-Surface Charge Separation of TiO₂-{001} Nanocrystals Leads to High Activity in Photocatalytic Methane Combustion

Shape-dependent acidity and photocatalytic activity of Nb2O5 nanocrystals with an active TT (001) surface.

Nb(2)O(5) nanorods and nanospheres were synthesized, and their photocatalytic activity for methylene blue decomposition in water compared. Nb(2)O(5) nanorods clearly displayed higher activity, despite their comparable surface area. With a shape-dependent surface acidity, hydrothermal stability, and high photoactivity, these Nb(2)O(5) nanorods are a unique and exciting nanomaterial for non-class...

Half-metallic properties of KP compound in a bulk and (001) surface of rock-salt structure: A b-initio study

Given the many applications of half-metals in the spintronics devices, we investigated the half-metallic properties of the KP compound in rock-salt (RS) and cesium chloride (CsCl) structural phases by using density functional theory. The results indicated that the KP compound as the half-metal in the RS structure, in contrast to the CsCl structure, due to the small lattice constant and failure ...

Charge separation in Pt-decorated CdSe@CdS octapod nanocrystals.

We synthesize colloidal CdSe@CdS octapod nanocrystals decorated with Pt domains, resulting in a metal-semiconductor heterostructure. We devise a protocol to control the growth of Pt on the CdS surface, realizing both a selective tipping and a non-selective coverage. Ultrafast optical spectroscopy, particularly femtosecond transient absorption, is employed to correlate the dynamics of optical ex...

Charge Relaxation, Localization, and Separation in Colloidal Semiconductor Nanocrystals

microleakage evaluation in regard to cavo-surface designs & treatments

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