Improving the stability of plasmonic magnesium nanoparticles in aqueous media.

Improving the stability of plasmonic magnesium nanoparticles in aqueous media.
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提高等离子体镁纳米颗粒在水介质中的稳定性。

DOI:
10.1039/d1nr06139a
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发表时间:
2021-12-16
期刊:
影响因子:
6.7
通讯作者:
Ringe E
Ringe E
中科院分区:
材料科学2区
文献类型:
--
作者:
Asselin J;Hopper ER;Ringe E

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这项工作描述了两种不同的核-壳结构的基础上镁纳米粒子(NP)合成,以提高镁的水溶液中的稳定性。通过在不同时间结束聚合,可以将Mg-聚多巴胺NP中的壳厚度从5 nm调节至>50 nm;所得结构使金属等离子体核在水中稳定超过一小时。壳层在5 - 30 nm范围内的镁-二氧化硅纳米颗粒也可以通过改进的Stöber方法制备,并且它们在5%异丙醇水溶液中保持光学性质。这些新的架构允许镁纳米等离子体被调查作为替代银和Au在更广泛的实验条件下,丰富的各种应用。等离子体镁纳米颗粒可以在水悬浮液中稳定长达几个小时,通过保护它们内部的核-壳结构,这是通过聚多巴胺或溶胶-凝胶二氧化硅的缩合制备的。
This work describes two different core–shell architectures based on Mg nanoparticles (NPs) synthesised in order to improve Mg's stability in aqueous solutions. The shell thickness in Mg–polydopamine NPs can be modulated from 5 to >50 nm by ending the polymerization at different times; the resulting structures stabilize the metallic, plasmonic core in water for well over an hour. Mg–silica NPs with shells ranging from 5 to 30 nm can also be prepared via a modified Stöber procedure and they retain optical properties in 5% water-in-isopropanol solutions. These new architectures allow Mg nanoplasmonics to be investigated as an alternative to Ag and Au in a broader range of experimental conditions for a rich variety of applications. Plasmonic Mg nanoparticles can be stabilised up to a few hours in aqueous suspensions by protecting them inside core–shell architectures, which are prepared by condensation of either polydopamine or sol–gel silica.
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