Abstract

Monodisperse gold nanorods with high aspect ratio were synthesized by x-ray irradiation.Irradiation was first used to stimulate the creation of seeds. Afterward, nanorod growth wasstimulated either by chemical reduction or again by x-ray irradiation. In the last case, theentire process took place without reducing agents. The shape of the final productscould be controlled by modulating the intensity of the x-ray irradiation duringthe seed synthesis. In turn, the nanorod aspect ratio determines the absorptionwavelength of the nanorods that can thus be optimized for different applications.Likewise, the aspect ratio influences the uptake of the nanorods by HeLa cells.

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