研究目的
Investigating the growth dynamics of surface microbubbles generated in plasmonic nanoparticle suspension and comparing it with those in pure water with surface plasmonic structures to understand the effects of volumetric heating.
研究成果
The study demonstrates that NP suspension enables much higher bubble volume growth rates compared to surface heating conditions due to the higher heating efficiency of volumetric heating. It also shows that bubble growth can be efficiently tuned by changing the NP concentration in suspension, offering additional control for microfluidics applications.
研究不足
The study focuses on the growth dynamics of surface bubbles under specific conditions of laser power and NP concentration. The effects of other variables such as different types of NPs or laser wavelengths are not explored.
1：Experimental Design and Method Selection:
The study involves generating micro-sized surface bubbles on a bare quartz surface immersed in a NP suspension and on a quartz surface pre-deposited with NP clusters immersed in DI water under pulsed laser excitations.
2：Sample Selection and Data Sources:
The samples include plasmonic Au NP suspensions with varying concentrations and DI water with pre-deposited NPs.
3：List of Experimental Equipment and Materials:
A mode-locked monochromatic femtosecond pulsed laser, quartz cuvettes, Au NPs, and a digital camera for high-speed videography.
4：Experimental Procedures and Operational Workflow:
The laser beam is focused on the quartz/suspension interfaces to generate surface bubbles, and their growth dynamics are recorded and analyzed.
5：Data Analysis Methods:
The bubble volume growth rates are analyzed using a home-built MATLAB code.
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