Biological resemblance of cadmium sulphide seaweeds coral honeycomb nanostructures by a chemical bath deposition technique

• Cadmium sulphide (CdS) emerged as one of the important semiconducting materials.
• A simple CBD technique for the preparation of CdS nanostructured crystalline thin films.
• Surface morphology of these films has been modified by varying complexing agent.
• Nano-seaweed-coral and honeycomb structure like CdS thin films are achieved for the first time.
• Also honeycomb-like-nanostructured thin film nano-walls are achieved for the first time.

Nanostructures of cadmium sulphide (CdS) have been attracting considerable research interests in electronic device fabrication due to their unique wide band gap (~2.4 eV) and high photosensitivity. Thin-films of CdS nanostructure have huge potential for solar cells, flat-panel displays and light-emitting-diodes. However, lack of a simple and convenient preparation method impedes their wide-spread device development. Here, a facile, efficient and scalable chemical bath deposition technique based preparation of thin films of CdS nanostructure is reported. Utilization of various complexing agents in the reaction mixture provided a unique surface topography to the CdS nanostructures similar to biological objects such as seaweed, coral-reef, and honeycomb. For the first time nanocrystalline, optical absorbance and morphology of three different CdS nanostructures derived from CBD are discussed.

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