研究目的
Investigating the photo-induced morphological evolution in Au thin films during shot-by-shot irradiation by a single laser pulse.
研究成果
The in-situ TXM system coupled with a nanosecond pulsed laser is a powerful tool for imaging the photo-induced transition from metal thin films to metal nanoparticles. The dewetting process and the behavior of the separated nanoparticles depend critically on the thickness of the Au films.
研究不足
The spatial resolution of the TXM system was limited to 49 nm, and the smallest perceivable nanoparticle was ~150 nm due to the short exposure time chosen for rapid imaging.
1：Experimental Design and Method Selection:
Coupling an in-situ transmission X-ray microscope (TXM) with a Nd:YAG pulsed laser to observe the dewetting process of Au thin films.
2：Sample Selection and Data Sources:
Au thin films with thicknesses of 10 and 20 nm deposited on a silicon-nitride membrane substrate.
3：List of Experimental Equipment and Materials:
Nd:YAG pulsed laser, TXM system, silicon-nitride membrane substrate, gold Fresnel zone plate (FZP), phase plate, CsI scintillator crystal, CCD camera.
4：Experimental Procedures and Operational Workflow:
Irradiating the Au thin films with laser pulses and monitoring the morphological changes using TXM.
5：Data Analysis Methods:
Analyzing the TXM images to observe the dewetting process and the formation of Au nanoparticles.
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