In the last 30 years, inorganic semiconductor nanocrystals (NCs) have been extensively researched because of their size-dependent optoelectronic properties, thus successfully debuting even in the commercial sector. The synthetic development of NCs, however, lies within the era of alchemic regime, perplexed from the very complex energy landscape of the reaction. Recently, attempts have been made to isolate the intermediate species with the hope of elucidating rather unknown reaction pathways of inorganic nanocrystals. As a result, the magic-sized cluster has been isolated and characterized with full atomic information.However, this “early intermediate” still having molecule-like properties is apart from the final product with a crystalline nature, thus not able to contribute much to the control over the final product. Here, we present covalent tetrapod nanocrystals as a crystalline “late intermediate” that warrants atomically controlled colloidal nanocrystal growth. We present the use of the late intermediate with well-defined facets at the sub-10 nm scale for directional growth with atomic control and highlight the potential for the new directed approach of NC synthesis. Further, the investigiation on the shape oringinating optical properties of III-V tetrapods is to be shared.

Atomically tailored single-crystalline III-V tetrapods

ACS Spring Meeting 2021

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