Metal oxide micro-nano structure based on laser direct writing as well as preparation and application thereof

[0063] Using tin dioxide sol as a precursor, using a femtosecond laser to directly write tin dioxide micro-wire structures, the steps are as follows:

[0064] 1. Dissolve 8.37g of stannous chloride dihydrate powder in 75mL of absolute ethanol, heat to about 78°C and reflux for 3 hours;

[0065] 2. Heat and stir the above solution in the air to evaporate to 50mL to control the SnCl 2 The concentration is 0.74mol / L, and then placed in a constant temperature water bath at 30°C for 24 hours, at this time the solution turns light yellow, and the sol-gel preparation is complete;

[0066] 3. Clean the glass slides ultrasonically with ethanol and deionized water, then set the parameters of the homogenizer to 1000r / min, 5s and 2000r / min, 30s, and use the homogenizer to spin-coat the stannous chloride sol on the glass slides , to obtain a sol-gel film with a thickness of 4 microns;

[0067] 4. Place the sample on the optical table, find the sample under the low magnification object

[0073] Femtosecond laser direct writing experiments were carried out using tin dioxide sol as a precursor, and the morphology was improved by adding polyethylene glycol (Mn 400). The steps are as follows:

[0074] 1. Dissolve 8.37g of stannous chloride dihydrate powder in 75mL of absolute ethanol, heat to about 78°C and reflux for 3 hours;

[0075] 2. Heat and stir the above solution in the air to evaporate to 50mL to control the SnCl 2The concentration is 0.74mol / L, and then placed in a constant temperature water bath at 30°C for 24 hours of static aging. At this time, the solution turns light yellow, and then 0.5g polyethylene glycol (Mn400) is added, stirred for 5 hours, and the sol-gel Preparation completed;

[0076] 3. Clean the glass slides ultrasonically with ethanol and deionized water, then set the parameters of the homogenizer to 1000r / min, 5s and 2000r / min, 30s, and use the homogenizer to spin-coat the stannous chloride sol on the glass slides , to obtain a sol

[0081] Using tin dioxide sol as a precursor, draw graphics through CAD, use femtosecond laser to directly write tin dioxide micro-nano structures, and control the shape and arrangement of micro-nano structures. The steps are as follows:

[0082] 1. Use CAD to design spiral lines and letter structure patterns;

[0083] 2. Dissolve 8.37g of stannous chloride dihydrate powder in 75mL of absolute ethanol, heat to about 78°C and then reflux and stir for 3 hours;

[0084] 3. Heat and stir the above solution in the air to evaporate to 50mL, control the SnCl 2 The concentration is 0.74mol / L, and then placed in a constant temperature water bath at 30°C for 24 hours of static aging. At this time, the solution turns light yellow, then add 0.5g polyethylene glycol (Mn400), stir for 5 hours, and the sol is prepared ;

[0085] 4. Use ethanol and deionized water to ultrasonically clean the glass slides, and then use a homogenizer to spin-coat the sol onto the glass slides at a speed of 2000