We investigate the possibility of reusing CTAB solutions for repeated synthesis of gold nanorods. Three tasks are solved. The first task is to clean the growth solutions from gold nanorods. The second task is to develop a method using a purified cetyltrimethylammonium bromide solution for repeated synthesis of gold nanorods with the same optical properties as in the initial synthesis. The third task is to test the possibility of management of the optical properties of nanorods for repeated synthesis. The polydispersity of nanorods is estimated by form factor using a mathematical model.
Color is an easily observable parameter of colloidal systems. The direction of the growth process of gold nanorods can be characterized by the color change of the colloid during the synthesis, therefore to determine the color dependences of gold mixtures on size, form-factor, and polydispersity index is the actual task. The results of this theoretical work are the color dependences of gold nanorod mixtures on various geometric sizes and polydispersion indexes.
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