Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Fully alloyed Ag/Au nanorods with tunable surface plasmon resonance and high chemical stability
Nanoscale ( IF 5.8 ) Pub Date : 2017-09-13 00:00:00 , DOI: 10.1039/c7nr06002e Yaocai Bai 1, 2, 3, 4, 5 , Chuanbo Gao 6, 7, 8, 9, 10 , Yadong Yin 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2017-09-13 00:00:00 , DOI: 10.1039/c7nr06002e Yaocai Bai 1, 2, 3, 4, 5 , Chuanbo Gao 6, 7, 8, 9, 10 , Yadong Yin 1, 2, 3, 4, 5
Affiliation
|
Limited success has been achieved in preparing nanorods of silver with uniform sizes and tunable localized surface plasmon resonances. Also, the practical applications of silver nanostructures have been hindered by their poor chemical stability in a corrosive environment. Here we address these issues by converting Au@Ag core/shell nanorods into fully alloyed ones through controlled high-temperature annealing in confined spaces. Compared with their core/shell counterparts, the obtained alloy nanorods demonstrated significantly enhanced stability toward oxidative etching. We also systematically investigated their novel plasmonic properties, and revealed that the band positions of both longitudinal and transverse modes can be readily tuned by either manipulating the Ag/Au ratio or starting with gold cores of different aspect ratios. Moreover, we have achieved widely adjusted peak intensity ratios between the transverse and longitudinal bands from 0.14 to 1.22, which is impossible for nonalloyed nanorods. The alloy nanorods developed in this work are believed to find great uses in fundamental spectroscopic studies as well as many attractive plasmonic applications.
中文翻译：
全合金Ag / Au纳米棒，具有可调节的表面等离子体共振和高化学稳定性
在制备具有均匀尺寸和可调节的局部表面等离子体共振的银纳米棒中，取得了有限的成功。而且，银纳米结构的实际应用由于其在腐蚀性环境中较差的化学稳定性而受到阻碍。在这里，我们通过在有限的空间内通过受控的高温退火将Au @ Ag核/壳纳米棒转变为完全合金化的棒，来解决这些问题。与它们的核/壳对应物相比，所获得的合金纳米棒表现出对氧化蚀刻的显着增强的稳定性。我们还系统地研究了它们的新型等离激元性质，并揭示了通过操纵Ag / Au比率或从不同长宽比的金核开始可以容易地调节纵向和横向模态的能带位置。而且，我们已经在横向和纵向带之间实现了从0.14到1.22的广泛调整的峰强度比，这对于非合金纳米棒是不可能的。据信在这项工作中开发的合金纳米棒在基础光谱研究以及许多有吸引力的等离子体应用中都有很大的用途。
更新日期：2017-10-12
中文翻译：
全合金Ag / Au纳米棒，具有可调节的表面等离子体共振和高化学稳定性
在制备具有均匀尺寸和可调节的局部表面等离子体共振的银纳米棒中，取得了有限的成功。而且，银纳米结构的实际应用由于其在腐蚀性环境中较差的化学稳定性而受到阻碍。在这里，我们通过在有限的空间内通过受控的高温退火将Au @ Ag核/壳纳米棒转变为完全合金化的棒，来解决这些问题。与它们的核/壳对应物相比，所获得的合金纳米棒表现出对氧化蚀刻的显着增强的稳定性。我们还系统地研究了它们的新型等离激元性质，并揭示了通过操纵Ag / Au比率或从不同长宽比的金核开始可以容易地调节纵向和横向模态的能带位置。而且，我们已经在横向和纵向带之间实现了从0.14到1.22的广泛调整的峰强度比，这对于非合金纳米棒是不可能的。据信在这项工作中开发的合金纳米棒在基础光谱研究以及许多有吸引力的等离子体应用中都有很大的用途。
京公网安备 11010802027423号