Abstract
A new seed-mediated growth technique for synthesizing gold nanorods (NRs) by using H2O2 as the weak reducer in the presence of a binary surfactant mixture is reported. Gold NRs prepared at different amounts of H2O2 and the gold seeds solution were characterized by transmission electron microscopy (TEM) and visible–near infrared spectroscopy. Gold NRs with tunable aspect ratio from 4.5 to 7 can be obtained and the corresponding longitudinal plasmonic wavelength of the produced gold NRs are tunable from 810 to 1140 nm. This method provides a new pathway for synthesis of gold NRs with a wide range of longitudinal plasmonic peaks, which have potential applications in optoelectronics and biomedicine.
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