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Design and fabrication of bimetallic plasmonic colloids through cold nanowelding
Nanoscale ( IF 5.8 ) Pub Date : 2022-05-31 , DOI: 10.1039/d2nr02092k Mariacristina Turino 1 , Enrique Carbó-Argibay 2 , Miguel Correa-Duarte 3 , Luca Guerrini 1 , Nicolas Pazos-Perez 1 , Ramon A Alvarez-Puebla 1, 4
Nanoscale ( IF 5.8 ) Pub Date : 2022-05-31 , DOI: 10.1039/d2nr02092k Mariacristina Turino 1 , Enrique Carbó-Argibay 2 , Miguel Correa-Duarte 3 , Luca Guerrini 1 , Nicolas Pazos-Perez 1 , Ramon A Alvarez-Puebla 1, 4
Affiliation
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The integration of Au and Ag into nanoalloys has emerged as an intriguing strategy to further tailor and boost the plasmonic properties of optical substrates. Conventional approaches for fabricating these materials via chemical reductions of metal salts in solution suffer from some limitations, such as the possibility of retaining the original morphology of the monometallic substrate. Spontaneous nanowelding at room temperature has emerged as an alternative route to tailor Au/Ag nanomaterials. Herein, we perform a thorough study on the cold-welding process of silver nanoparticles onto gold substrates to gain a better understanding of the role of different variables in enabling the formation of well-defined bimetallic structures that retain the original gold substrate morphology. To this end, we systematically varied the size of silver nanoparticles, dimensions and geometries of gold substrates, solvent polarity and structural nature of the polymeric coating. A wide range of optical and microscopy techniques have been used to provide a complementary and detailed description of the nanowelding process. We believe this extensive study will provide valuable insights into the optimal design and engineering of bimetallic plasmonic Ag/Au structures for application in nanodevices.
中文翻译：
通过冷纳米焊接设计和制造双金属等离子体胶体
将金和银集成到纳米合金中已成为一种有趣的策略，可进一步定制和提高光学基板的等离子体特性。通过传统方法制造这些材料溶液中金属盐的化学还原受到一些限制，例如保留单金属底物原始形态的可能性。室温下的自发纳米焊接已成为定制 Au/Ag 纳米材料的替代途径。在此，我们对银纳米粒子在金基板上的冷焊过程进行了深入研究，以更好地了解不同变量在形成保留原始金基板形态的明确双金属结构中的作用。为此，我们系统地改变了银纳米颗粒的尺寸、金基材的尺寸和几何形状、溶剂极性和聚合物涂层的结构性质。广泛的光学和显微镜技术已被用于提供纳米焊接过程的补充和详细描述。我们相信这项广泛的研究将为用于纳米器件应用的双金属等离子体 Ag/Au 结构的优化设计和工程提供有价值的见解。
更新日期：2022-05-31
中文翻译：
通过冷纳米焊接设计和制造双金属等离子体胶体
将金和银集成到纳米合金中已成为一种有趣的策略，可进一步定制和提高光学基板的等离子体特性。通过传统方法制造这些材料溶液中金属盐的化学还原受到一些限制，例如保留单金属底物原始形态的可能性。室温下的自发纳米焊接已成为定制 Au/Ag 纳米材料的替代途径。在此，我们对银纳米粒子在金基板上的冷焊过程进行了深入研究，以更好地了解不同变量在形成保留原始金基板形态的明确双金属结构中的作用。为此，我们系统地改变了银纳米颗粒的尺寸、金基材的尺寸和几何形状、溶剂极性和聚合物涂层的结构性质。广泛的光学和显微镜技术已被用于提供纳米焊接过程的补充和详细描述。我们相信这项广泛的研究将为用于纳米器件应用的双金属等离子体 Ag/Au 结构的优化设计和工程提供有价值的见解。
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