Seedless synthesis of high aspect ratio gold nanorods with high yield

A seedless method has been developed for the synthesis of high aspect ratio gold nanorods. Gold nanorods with a longitudinal surface plasmon resonance of larger than 1400 nm were synthesized in one step. The yield was high, and no purification step was needed. We also synthesized normal aspect ratio gold nanorods by a seedless method. The conditions for the synthesis of uniform gold nanorods with different width and aspect ratio by a seedless method were explored. A better understanding of the seedless method enables the facile synthesis of nanomaterials with a broader size tunability and better reproducibility.

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