Nanoparticles made of non-noble metals such as gallium have recently attracted significant attention due to promising applications in UV plasmonics. To date, experiments have mostly focused on solid and liquid pure gallium particles immobilized on solid substrates. However, for many applications, colloidal liquid-metal nanoparticle solutions are vital. Here, we experimentally demonstrate strong UV plasmonic resonances of eutectic gallium-indium (EGaIn) liquid-metal alloy nanoparticles suspended in ethanol. We rationalise experimental results through a theoretical model based on Mie theory. Our results contribute to the understanding of UV plasmon resonances in colloidal liquid-metal EGaIn nanoparticle suspensions. They will also enable further research into emerging applications of UV plasmonics in biomedical imaging, sensing, stretchable electronics, photoacoustics, and electrochemistry.

由非贵金属（例如镓）制成的纳米粒子由于在紫外等离子体激元中的应用前景而引起了人们的广泛关注。迄今为止，实验主要集中在固定在固体基质上的固体和液体纯镓颗粒。然而，对于许多应用来说，胶体液态金属纳米颗粒解决方案至关重要。在这里，我们通过实验证明了悬浮在乙醇中的共晶镓铟（EGaIn）液态金属合金纳米粒子的强紫外等离子体共振。我们通过基于米氏理论的理论模型合理化实验结果。我们的结果有助于理解胶体液态金属 EGaIn 纳米粒子悬浮液中的紫外等离子体共振。他们还将进一步研究紫外等离子体在生物医学成像、传感、可拉伸电子学、光声学和电化学中的新兴应用。