Method for preparing controllable noble metal nanoparticles through femtosecond laser regulation and control electric replacement reaction
A nanoparticle and femtosecond laser technology, applied in the field of laser chemistry, can solve the problems of complex operation process and general controllability, and achieve the effects of strong chemical reduction, excellent Raman detection performance, and high processing efficiency
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Embodiment 1
[0031] The specific steps of preparing platinum nanoparticles with controllable deposition sites by using femtosecond laser regulated electrodisplacement reaction are as follows:
[0032] (1) Fix the single crystal silicon wafer with crystal orientation after cleaning and drying on the high-precision six-dimensional processing translation table;
[0033] (2) The Gaussian laser output by the femtosecond laser passes through a cylindrical mirror with a focal length of 50mm, shaping the Gaussian distributed laser into a linearly distributed laser, and focusing it on the single crystal silicon fixed on the six-dimensional linkage electronic control platform Above, the laser processing parameters were adjusted to a pre-focus spot diameter of 5 mm, a pulse energy of 60 μJ, and a laser scanning speed of 2000 μm / s. A single scribing scan can form a large-area uniform modified micro-nano structure. The same process was carried out three times to obtain three samples after laser pretr...
Embodiment 2
[0036] The specific steps of preparing gold nanoparticles with controllable deposition sites by using femtosecond laser to regulate the electrodisplacement reaction are as follows:
[0037] (1) Fix the single crystal silicon wafer with crystal orientation after cleaning and drying on the high-precision six-dimensional processing translation table;
[0038] (2) The Gaussian laser output by the femtosecond laser passes through a cylindrical mirror with a focal length of 50mm, shaping the Gaussian distributed laser into a linearly distributed laser, and focusing it on the single crystal silicon fixed on the six-dimensional linkage electronic control platform Above, the laser processing parameters were adjusted to a pre-focus spot diameter of 5 mm, a pulse energy of 60 μJ, and a laser scanning speed of 2000 μm / s. A single scribing scan can form a large-area uniform modified micro-nano structure. The same process was carried out three times to obtain three samples after laser pre...
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