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Optical-Propulsion Metastructures
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DOI：10.1002/adma.202406384.png)
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Abstract
En 中文
Pulsed laser micropropulsion (PLMP) offers a promising avenue for miniature space craft, yet conventional propellants face challenges in balancing efficiency and stability. An optical-propulsion metastructure strategy using metal-organic frameworks (MOFs) is presented to generate graphene-metal metastructures (GMM), specifically GMM-(HKUST-1), which significantly enhances PLMP performance. This novel approach leverages the unique interaction between pulsed lasers and the precisely engineered GMMs-comprising optimized metal nanoparticle size, graphene layers, and inter-particle gaps-to boost both propulsion efficiency and stability. Experimental and numerical analyses reveal that GMM-(HKUST-1) achieves aspecific impulse of 1072.94 s, ablation efficiency of 51.22%, and impulse thrust per mass of 105.15 mu N mu g-1, surpassing traditional propellants. With an average particle size of approximate to 12 nm and a density of 0.958 g cm-3, these metastructures exhibit 99% light absorption efficiency and maintain stability under atmospheric and humid conditions. The graphene nanolayer efficiently absorbs and converts laser energy, while the metal nanostructures enhance light-matter interactions, promoting energy transfer and material stability. These findings suggest that this GMM-based optical-propulsion strategy can revolutionize microspacecraft propulsion and energy systems, offering significant advancements across various domains. This study introduces optical-propulsion metastructures, for enhanced laser micropropulsion performance. This metastructure achieves 99% light absorption efficiency and a material density of 0.958 g cm-3. It maintains exceptional energy conversion and structural integrity under adverse conditions. The cost-effective fabrication technique suggests scalability for future microspacecraft and nanosatellite propulsion systems. image
Keywords:
energy conversion and stability
metal-organic frameworks
nanostructured propellants
pulsed laser micropropulsion
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