Fine-tuning the photoluminescence and photocatalytic properties of CdS nanorods of varying dimensions

► Hexagonal CdS nanorods of varied length, width and surface area is prepared. ► Photoactivity of CdS nanorod improves with the length and radial diameter. ► CdS luminescence increases with the decreasing crystallinity and aspect ratio. ► Size and nature (Au/Ag) of metal deposition alter the photoresponse of CdS. ► CdS absorption and emission are greatly changed due to quantum size effect.