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设计一个基层微/纳米结构的基于Si@Au的人工酶,以提高活性部位的可访问性,以增强催化作用

Jian Wang¹, Bo Ye², Shiqi Xiao²

¹School of Chemistry, Southwest Jiaotong University Chengdu 610031 China xliu@swjtu.edu.cn.

|January 17, 2024

概括

球对球的二氧化微球使高密度金纳米粒子 (AuNP) 增长,增强催化活性. 这种新材料在生物传感应用中显示出出色的过氧化酶模仿活性,用于敏感的过氧化检测.

科学领域:

纳米材料科学科学纳米材料科学
催化剂是一种催化剂.
生物医学工程生物医学工程

背景情况:

可访问的活性点和金纳米粒子 (AuNPs) 的高负载对于支持的AuNP催化剂至关重要.
当前的方法在准备支持的AuNP催化剂时面临挑战,这些催化剂具有高度可访问的活性站点.

研究的目的:

为高密度AuNP生长开发一种新的层次的微球平台.
为了研究由此产生的AuNP-酸纳米结构的催化和传感特性.

主要方法:

合成具有高密度的硫醇组的球体上的球体 (SoS) 微球.
在SoS平台上,高密度金纳米粒子 (AuNPs) 的增长.
对过氧化酶模仿活性和过氧化检测能力的评估.

主要成果:

层次的SoS-0.55@Au-7.3纳米结构表现出优异的过氧化酶模仿活性,具有特定的动力参数 (Km = 0.033 mM,Vmax = 34.6 × 10−8 M s−1).
该系统表现出高稳定性和可重复使用性.
对过氧化 (H2O2) 的敏感检测在低检测极限为1.6μM和广泛的线性范围内实现.

结论:

开发的SoS基平台有助于制备高度活性和稳定的支持AuNP催化剂.
在生物传感和生物医学分析中,SoS-0.55@Au-7.3纳米结构显示出敏感过氧化检测的巨大潜力.

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