Preparation method of visible-shortwave infrared light detection substrate based on oxide/gold nanorod/silicon
A gold nanorod, infrared light technology, applied in climate sustainability, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of hindering silicon application, limited light absorption intensity, and high carrier recombination rate, reaching Good detection characteristics, wide spectral response range and strong anti-interference ability
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Embodiment 1
[0025] A visible-shortwave infrared photodetection substrate based on oxide / gold nanorods / silicon, which synthesizes small-sized gold nanorods with different aspect ratios by a silver-induced seedless method; The absorbing layer is annealed to obtain a more tightly bonded gold nanorod / silicon wafer substrate; different oxide films are deposited on the surface of the gold nanorod / silicon wafer substrate to form a heterojunction structure with good photoelectric response, and finally the oxide / gold nanorod / silicon substrate visible-short-wave infrared light detection substrate, prepared according to the following steps:
[0026] (1) Synthesis of gold nanorods with different aspect ratios: using silver-induced seedless method, using 0.22 M CTAB solution as the growth solution, adding 9.12 ml 10 mM HAuCl to 192.49 ml 0.22 M CTAB solution in sequence 4 solution, 5.4ml 10 mM AgNO 3 solution and 22.8 ml 0.053 M hydroquinone solution, after the solution became colorless, add 22.8 μl...
Embodiment 2
[0033] A visible-short-wave infrared light detection substrate based on oxide / gold nanorod / silicon, similar to Example 1, prepared according to the following steps:
[0034] (1) Synthesis of gold nanorods with different aspect ratios: using silver-induced seedless method, using 0.22 M CTAB solution as the growth solution, adding 9.12 ml 10 mM HAuCl to 192.49 ml 0.22 M CTAB solution in sequence 4 solution, 0.9ml 10 mM AgNO 3 solution, 22.8 ml 0.053 M hydroquinone solution, after the solution became colorless, add 18 μl 17.05 mM NaBH to the solution at a stirring rate of 1500 rpm 4 The ice-water mixture solution (0°C), stirring the solution for 2 minutes, then standing at a constant temperature of 30°C for more than 12 hours to fully react, centrifuged the above solution three times at 11,000 rpm for 15 minutes to remove CTAB in the solution, and obtained longitudinal surface plasmons Gold nanorods with excitonic absorption peak at 600nm;
[0035] (2) Load gold nanorods onto t...
Embodiment 3
[0039] A visible-short-wave infrared light detection substrate based on oxide / gold nanorod / silicon, similar to Example 1, prepared according to the following steps:
[0040] (1) Synthesis of gold nanorods with different aspect ratios: using silver-induced seedless method, using 0.22 M CTAB solution as the growth solution, adding 9.12 ml 10 mM HAuCl to 192.49 ml 0.22 M CTAB solution in sequence 4 solution, 3.6ml 10 mM AgNO 3 solution, 22.8 ml 0.053 M hydroquinone solution, after the solution became colorless, add 27.6 μl 17.05 mM NaBH to the solution at a stirring rate of 1000 rpm 4 The ice-water mixture solution (0°C), kept stirring for 2 minutes, then kept the solution at a constant temperature of 30°C for more than 12 hours, centrifuged the above solution three times at 11,000 rpm for 15 minutes to remove CTAB in the solution, and obtained longitudinal surface plasmons Gold nanorods with excitonic absorption peak at 850nm;
[0041] (2) Au nanorods loaded on the surface of ...
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