研究目的
Investigating the nucleation of plasmonic bubbles in binary liquids on gold nanoparticles under laser irradiation to understand the determining parameters for the nucleation time and volume of the bubble.
研究成果
The delay time between the start of laser heating and bubble nucleation is determined by the absolute amount of dissolved gas in the liquid, while the bubble volume depends on the liquid's vaporization energy. These findings allow for tuning the delay time and size of vapor bubbles by varying liquid parameters, which is promising for medical applications.
研究不足
The study focuses on the early stage of bubble nucleation and does not cover the long-term dynamics or stability of the bubbles. The binary liquids were saturated with air, which may not represent all possible conditions in applications.
1：Experimental Design and Method Selection:
The study involved irradiating gold nanoparticles submerged in binary liquids with a continuous-wave laser to observe the nucleation of plasmonic bubbles.
2：Sample Selection and Data Sources:
Six binary liquid combinations were prepared by mixing water with organic liquids (ethanol, acetone, 1-propanol, 2-propanol, 1-butanol) and ethanol with other organic liquids.
3：List of Experimental Equipment and Materials:
A gold nanoparticle decorated sample, a 300 mW, 532 nm continuous wave laser, high-speed cameras for top and side views, and various optical components for controlling and measuring laser intensity.
4：Experimental Procedures and Operational Workflow:
Laser pulses of 400 μs were generated to study the short-term dynamics of the microbubbles. The nucleation and growth of bubbles were captured with high-speed cameras.
5：Data Analysis Methods:
The delay time and bubble volume were analyzed in relation to the liquid parameters and laser power.
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