Gold seed growth based preparation method of terminal reflective optical fiber surface plasmon resonance sensor
A resonant sensor, terminal reflection technology, applied in instruments, scientific instruments, material analysis through optical means, etc., to achieve the effect of low cost, high sensitivity, convenient and simple method
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Embodiment 1
[0026] After the optical fiber is pretreated to remove the polymer and the cladding layer, it is cleaned with deionized water and ethanol respectively, dried with nitrogen, and soaked in piranha washing solution at 70-90°C (concentrated sulfuric acid with a volume ratio of 7:3 mixed solution with hydrogen peroxide) for 30 minutes, take it out, wash it with deionized water, and blow it dry with nitrogen to get the surface of the optical fiber modified by -OH, put it in an oven at 100°C for 1 hour, and cure the -OH on the surface of the optical fiber; take it out, and put The optical fiber with -OH was soaked in a methanol solution of 10% aminopropyltrimethoxysilane (APTMS) at room temperature for 8 hours, cleaned with methanol after taking it out, and dried with nitrogen to obtain -NH 2 The surface of the modified optical fiber was placed in an oven at 110°C for 1h, and the -NH on the surface of the optical fiber 2 solidified. Gold species with a particle size of about 2.5 nm ...
Embodiment 2
[0029] After the optical fiber is pretreated to remove the polymer and the cladding layer, it is cleaned with deionized water and ethanol respectively, dried with nitrogen, and soaked in piranha washing solution at 70-90°C (concentrated sulfuric acid with a volume ratio of 7:3 mixed solution with hydrogen peroxide) for 30 minutes, take it out, wash it with deionized water, and blow it dry with nitrogen to get the surface of the optical fiber modified by -OH, put it in an oven at 100°C for 1 hour, and cure the -OH on the surface of the optical fiber; take it out, and put The optical fiber with -OH was immersed in a methanol solution of 10% aminopropyltrimethoxysilane (APTMS) for 6 hours at room temperature, cleaned with methanol after taking it out, and dried with nitrogen to obtain -NH 2 The surface of the modified optical fiber was placed in an oven at 110°C for 1h, and the -NH on the surface of the optical fiber 2 solidified. Gold species with a particle size of about 2.5 n...
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