摘要： Achieving efficient solar steam generation under natural sunlight has huge potential for sewage purification and seawater desalination. Plasmonic resonance has been extensively exploited for enhancing and extending the range of optical absorption. Up till now, most reported broadband plasmonic solar absorbers are designed by compact aggregation or engineering plasmonic architectures. In this work, we develop a new plasmonic absorber using gold nanostructure with the shape of a trepang (nano-trepang). By rationally regulated anisotropy at the single nanoparticle level, the nano-trepang show good optical absorption over the entire solar spectrum (92.9 %) with no requirement of engineering nanoparticles aggregation or constructing plasmonic architecture. The nano-trepang were then loaded into a polymeric aerogel and the network shows excellent solar-to-vapor energy conversion of 79.3%. Under 1 sun AM1.5 G irradiation, a stable solar vapor rate of 2.7 kg m-2 h-1 can be achieved, with high performance of anti-salt precipitation in the practice seawater steam generation. This work shows a broadband plasmonic absorber with aggregation-independent performance for high-efficient solar stream generation and provides new strategy for practical solar desalination.