A kind of processing method of nanorod
A processing method and nanorod technology are applied in the processing field that can improve the morphology of nanorods, can solve the problems of harsh reaction conditions, complicated operation, toxic reagents, etc., and achieve the effects of mild reaction conditions, simple operation and high repeatability
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Embodiment 1
[0036] Take 5 parts of 1 mL purified bone-shaped gold nanorod solution at 12000 rpm, centrifuge once for 5 minutes to remove the supernatant, and add hexadecyltrimethyl bromide at concentrations of 10, 20, 50, 100 and 200 mM Ammonium solution 1mL, add 10μL of 1M sulfuric acid and 10μL of 10mM copper chloride solution; mix well; put in 30°C constant temperature water bath, place respectively for 49h, 49h, 27h, 10h, 5h; Visible absorption spectrophotometer measures the ultraviolet absorption spectrum of the above mixed solution over time, and the measurement temperature is 30°C;
[0037] The result of LSPR changing with time is as follows figure 1 Shown in D, it shows that the speed of regulation and control of the head shape of the gold nanorods by the method of the present invention increases with the concentration of cetyltrimethylammonium bromide, the trend that the blue shift of the LSPR peak position accelerates, from figure 2 Under each condition, the ultraviolet absorp...
Embodiment 2
[0039] Take 5 parts of 1 mL of the purified bone-shaped gold nanorod solution at 12,000 rpm, centrifuge once again for 5 minutes to remove the supernatant, and add 1 mL of 100 mM cetyltrimethylammonium bromide and 10 μL of 10 mM Copper chloride solution; and add 0, 5, 10, 50, 100, 200μL of sulfuric acid solution with a concentration of 1M, mix well; put it in a constant temperature water bath at 30°C, and place it for 25h, 10h, 10h, 10h, 10h, 10h respectively ; Measure the ultraviolet absorption spectrum of the above mixed solution over time with an ultraviolet-visible absorption spectrophotometer, and the measurement temperature is 30°C.
[0040] The result of LSPR changing with time is as follows figure 1 As shown in E, it shows that the speed of regulation and control of the head shape of the gold nanorods by the method of the present invention increases with the concentration of sulfuric acid, and the blue shift of the LSPR peak position first accelerates and then has a le...
Embodiment 3
[0042] Take 5 parts of 1 mL of the purified bone-shaped gold nanorod solution at 12,000 rpm, and centrifuge again for 5 minutes to remove the supernatant, and add 1 mL of 100 mM cetyltrimethylammonium bromide and 10 μL of 1 M Sulfuric acid solution; and add 0, 5, 10, 50, 100μL of copper chloride solution with a concentration of 10mM respectively, and mix well; put it in a constant temperature water bath at 30°C, and place it for more than 25h, 10h, 10h, 7h, 7h respectively; - Measure the ultraviolet absorption spectrum of the above mixed solution over time with a visible absorption spectrophotometer, and the measurement temperature is 30°C.
[0043] The result of LSPR changing with time is as follows figure 1 Shown in F, it shows that the method of the present invention increases the trend that the blue shift of LSPR peak position accelerates with the cupric chloride concentration increase LSPR peak position to the regulation and control rate of gold nanorod head shape, from ...
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