A kind of flexible membrane material and preparation method thereof for SERS detection
A flexible and membrane-like detection technology, which is applied in the fields of material analysis, material excitation analysis, and material analysis through optical means, can solve the problems of light avoidance, weak stability of metallic silver, and uneven distribution, and achieve high enhancement factor and convenient Wipe sampling, the effect of uniform thickness
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Embodiment 1
[0029] Embodiment 1 (see figure 1 )
[0030] 1) Preparation of PCL / CS composite solution: Dissolve 0.8g of PCL particles in 9.2g of glacial acetic acid solution at 50°C to obtain 8%wt PCL solution; dissolve 0.2g of CS powder in 9.8g of 90%wt acetic acid at 90°C solution, a 2% wt CS solution was obtained. At 50°C, 3.33g 8%wt PCL was added dropwise to 10g 2%wt CS with a mass ratio of 1:1.5, and stirred at 50°C for 2h to synthesize a PCL / CS solution.
[0031] 2) Preparation of PCL / CS flexible film: inject the PCL / CS solution into the mold, dry it at 50°C to form a film, soak it in 10% NaOH for 5 minutes, rinse and soak it with clean water until the solution is neutral. Finally, dry again in a natural state for later use.
[0032] 3) Preparation of gold seed solution: 0.025mL 0.01M HAuCl 4 solution and 0.6 mL of 0.01M NaBH 4 The solution was added to 1 mL of 0.1M CTAB solution, stirred for 30 min, and left to stand for use.
[0033] 4) Immerse the PCL / CS flexible film cut in...
Embodiment 2
[0037]1) Preparation of PCL / CS composite solution: Dissolve 0.8g of PCL particles in 9.2g of glacial acetic acid solution at 50°C to obtain 8%wt PCL solution; dissolve 0.2g of CS powder in 9.8g of 90%wt acetic acid at 90°C solution, a 2% wt CS solution was obtained. At 50°C, 3.33g 8%wt PCL was added dropwise to 10g 2%wt CS with a mass ratio of 1:1.5, and stirred at 50°C for 2h to synthesize a PCL / CS solution.
[0038] 2) Preparation of PCL / CS flexible film: inject the PCL / CS solution into the mold, dry it at 50°C to form a film, soak it in 10% NaOH for 5 minutes, rinse and soak it with clean water until the solution is neutral. Finally, it was dried again in a natural state for further use, and its morphology was characterized by SEM.
[0039] 3) Preparation of gold seed solution: 0.025mL 0.01M HAuCl 4 solution and 0.6 mL of 0.01M NaBH 4 The solution was added to 1 mL of 0.1M CTAB solution, stirred for 30 min, and left to stand for use.
[0040] 4) Immerse the PCL / CS flexi...
Embodiment 3
[0044] 1) Preparation of PCL / CS composite solution: Dissolve 0.8g of PCL particles in 9.2g of glacial acetic acid solution at 50°C to obtain 8%wt PCL solution; dissolve 0.2g of CS powder in 9.8g of 90%wt acetic acid at 90°C solution, a 2% wt CS solution was obtained. At 50°C, 3.33g 8%wt PCL was added dropwise to 10g 2%wt CS with a mass ratio of 1:1.5, and stirred at 50°C for 2h to synthesize a PCL / CS solution.
[0045] 2) Preparation of PCL / CS flexible film: inject the PCL / CS solution into the mold, dry it at 50°C to form a film, soak it in 10% NaOH for 5 minutes, rinse and soak it with clean water until the solution is neutral. Finally, dry again in a natural state for later use.
[0046] 3) Preparation of gold seed solution: 0.025mL 0.01M HAuCl 4 solution and 0.6 mL of 0.01M NaBH 4 The solution was added to 1 mL of 0.1M CTAB solution, stirred for 30 min, and left to stand for use.
[0047] 4) Immerse the PCL / CS flexible film cut into a suitable size into the gold nanopar...
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