Scientists have discovered a method to fine-tune the shapes of nanorod photocatalyst particles. These materials accelerate reactions when they are activated by light and their shape affects their behavior. Researchers showed that the photocatalysts, made from tiny amounts of cadmium, sulfur and selenium, will form selectively into shapes that look like either tadpoles or drumsticks depending on the selenium concentration. Their optical properties depend strongly on the relative amounts of sulfur and selenium; the sulfur to selenium ratio changes along the length of each particle causing each end to interact with light differently. These nanomaterials are being studied for their potential as light harvesting antennas, as novel optically driven biomass conversion catalysts and to form more complex nanostructures and light harvesting devices.
Expanding the One-Dimensional CdS-CdSe Composition Landscape: Axially Anisotropic CdS1-xSex