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四金属Au@Ag-Pd-Pt纳米酶具有表面暴露的活性位点,用于增强催化活性

Vasily G Panferov¹, Nadezhda A Byzova¹, Konstantin B Shumaev¹

¹A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, Moscow 119071, Russia.

Nanomaterials (Basel, Switzerland)

|December 10, 2025

概括

研究人员开发了具有增强酶模拟活性的新型四金属金-银--纳米粒子 (Au@Ag-Pd-Pt NPs). 这些纳米酶表现出优异的过氧化酶类性能,为先进的生物医学和分析应用提供高效的金属利用.

科学领域:

纳米技术纳米技术
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

具有酶模拟活动的金属纳米粒子 (NP),称为纳米酶,对于生物医学和分析应用至关重要.
提高纳米酶催化活性和金属利用效率对于技术进步至关重要.

研究的目的:

为了合成和表征新的四金属Au@Ag-Pd-PtNPs.
研究合成参数对NP属性的影响.
评估合成NP的过氧化酶类活性和光学特性.

主要方法:

使用顺序,种子介导的方法进行水相,室温合成.
Au NP 种子的形成,Ag 的过度生长,以及用 Pd 和 Pt 的替代.
系统地调查Au核心直径,Ag前体度和Pd与Pt的比率.

主要成果:

与单金属,双金属和三金属对应物相比,四金属Au@Ag-Pd-PtNP表现出更高的过氧化酶类活性.
可调节的最大吸收度从520nm到650nm,具有高的灭绝系数.
确认了带有表面丰富的Pd和Pt的核心--架构,从而使活动提高了10倍以上,并减少了贵金属的使用.

结论:

合成的Au@Ag-Pd-PtNP表现出高的催化活性和可调节的光学特性.
在核心--结构中,表面丰富的Pd和Pt提高了催化效率和金属利用率.
这些NP是生物传感应用的有希望的多功能标签.

关键词:

催化剂是一种催化剂.的替代品的替代品纳米酶是一种纳米酶.过氧化酶模仿活动.聚金属纳米粒子是多金属的纳米粒子.纳米颗粒的合成.

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