SiO2 nano-particle taking positive electrical polyelectrolyte as template and doped with negative electricity dye and preparation method thereof
一种聚电解质、纳米粒子的技术,应用在用于材料和表面科学的纳米技术、纳米技术、纳米技术等方向,能够解决染料不具有保护作用等问题
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Embodiment 1
[0070] Add 0.5ml of alcohol / water = 8 alcohol-water mixture, 4ml of ethanol, 100μl of PDADMAC (molecular weight 100,000 to 200,000 Da) aqueous solution with a concentration of 10mg / ml into a 20ml glass bottle, magnetic stirring (speed is 500rpm) Add 400 μl HPTS aqueous solution (1 mg / ml) to the bottom, stir for 20 minutes to obtain a complex solution of polyelectrolyte and fluorescent dye; add 8.4 ml ethanol, 815 μl water, 0.1 ml ammonia water to a 20 ml glass bottle, control the magnetic stirring speed to 200 rpm, add 300 μl TEOS Start counting and start timing. After 25 minutes of reaction, take 1ml of the complex solution of polyelectrolyte and fluorescent dye and quickly add it to the In the system, after mixing, the magnetic stirring speed was controlled to be 50 rpm, and the reaction was continued for 24 hours. Prepared HPTS-doped spherical SiO 2 The uniformity of nanoparticles is good, and the average particle size is 50±5nm.
[0071] figure 1 The SiO doped with ne...
Embodiment 2
[0073] Add 2.3ml of alcohol / water = 8 alcohol-water mixture, 2.4ml of ethanol, 100μl of PDADMAC (molecular weight of 100,000 to 200,000 Da) aqueous solution with a concentration of 10mg / ml into a 20ml glass bottle, magnetic stirring (speed of 500rpm) ), add 200 μl of HPTS aqueous solution (1 mg / ml), and stir for 20 minutes to obtain a complex solution of polyelectrolyte and fluorescent dye; add 8.4 ml of ethanol, 815 μl of water, and 0.1 ml of ammonia into a 20 ml glass bottle, and control the magnetic stirring speed to be 200 rpm, Add 300 μl TEOS to start counting and start timing. After 25 minutes of reaction, take 1 ml of the complex solution of polyelectrolyte and fluorescent dye and quickly add it to the solution. In the system, after mixing, the magnetic stirring speed was controlled to be 50 rpm, and the reaction was continued for 24 hours. Prepared HPTS-doped spherical SiO 2 The uniformity of nanoparticles is good, and the average particle size is 50±5nm.
Embodiment 3
[0075] Add 3.2ml of alcohol / water=8 alcohol-water mixture, 1.6ml of ethanol, and 100μl of 10mg / ml PDADMAC (molecular weight 100,000 to 200,000 Da) aqueous solution into a 20ml glass bottle, stir magnetically (speed at 500rpm) ), add 100 μl of HPTS aqueous solution (1 mg / ml) and stir for 20 minutes to obtain a complex solution of polyelectrolyte and fluorescent dye; add 8.4 ml of ethanol, 815 μl of water and 0.1 ml of ammonia to a 20 ml glass bottle, and control the magnetic stirring speed to be 200 rpm , adding 300 μl TEOS to start timing, after 25 minutes, quickly adding 1 ml of the complex solution of polyelectrolyte and fluorescent dye, mixing well, stirring at 50 rpm, and continuing to react for 24 hours.
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