Gold nanorod with broadband adjustable absorption characteristic and preparation method thereof

The invention discloses a gold nanorod with broadband adjustable absorption and a preparation method of the gold nanorod. The preparation method comprises the following steps: firstly, preparing the gold nanorod by utilizing a seed growth method, and then carrying out centrifugal preservation treatment on the gold nanorod; computer software origin is used for simulation, and the proportion of all the gold nanorods needed by the corresponding broadband absorption gold nanorods is obtained; and finally, adding the gold nanorod solution according to the corresponding proportion obtained by simulation calculation, and mixing to obtain the broadband absorption gold nanorod. And meanwhile, the broadband absorption range can be adjusted by selecting the gold nanorods with different sizes according to requirements. The synthesized broadband adjustable absorption gold nanorod is simple in structural preparation method, the absorption range is easy to regulate and control, and meanwhile, the synthesized broadband gold