Application of ferroferric oxide as photo-thermal sensitive material
A technology of ferroferric oxide and sensitive materials, which is applied in the direction of medical preparations containing active ingredients, wave energy or particle radiation treatment materials, preparations for in vivo tests, etc., to achieve remarkable curative effect, obvious photothermal effect, and toxic and side effects small effect
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Embodiment 1
[0027] Example 1 Fe 3 o 4 preparation of
[0028] Weigh 1.35g FeCl 3 ·6H 2 O. Dissolve 0.4g of sodium citrate in 70mL of ethylene glycol, add 3.85g of ammonium acetate, stir for 1h, transfer to a 100mL reaction kettle, react at 200°C for 10h, take it out and separate it using a magnetic field, and wash it with water for 3 times to obtain Fe 3 o 4 Powder, spare.
Embodiment 2
[0029] Example 2 Fe 3 o 4 The near-infrared absorption of the solution
[0030] Fe prepared by embodiment 1 3 o 4 The powder was prepared with normal saline to prepare Fe with concentration C of 5, 10, 25, 50, 75, 100, 150 and 300 μg / mL 3 o 4 Solution, utilize ultraviolet spectrophotometer to measure its absorbance A at 808nm place, the result sees figure 1 shown. Fe 3 o 4 The solution has a certain absorption at 808nm and has good linearity. The linear regression equation is A= 0.0051C + 0.0119, R 2 =0.9998.
Embodiment 3
[0031] Example 3 Fe 3 o 4 Photothermal conversion effect of solution
[0032] Fe prepared by embodiment 1 3 o 4 The powder was prepared with normal saline with Fe concentrations of 30, 75, 150 and 300 μg / mL 3 o 4 solution, 0.5 mL of each concentration was placed in a 2mL centrifuge tube, and water was used as a reference, and 808nm laser (2 W / cm 2 ) at room temperature for 5 minutes, measure the temperature every 30s, see the results figure 2 , 3 shown.
[0033] From figure 2 It can be seen that Fe 3 o 4 Has good photothermal conversion effect, 150 μg / mL and 300 μg / mLFe 3 o 4 The temperatures of the solutions reached 71°C and 83°C after irradiation for 5 minutes, and the transformation effect increased with the increase of the concentration. From image 3 It can be seen that Fe 3 o 4 After the solution is irradiated, due to the temperature rise, the water vapor forms water droplets on the bottle wall, but after the water undergoes the same irradiation, no wat...
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