Effect of a Mixed Peptide Ligand Layer on Au Nanoparticles for Optical Control of Catalysis
Effect of a Mixed Peptide Ligand Layer on Au Nanoparticles for Optical Control of Catalysis
复制标题
DOI：
10.1021/acsanm.2c01674
复制
发表时间：
2022-06
影响因子：
5.9
通讯作者：
Maichong Xie;J. Slocik;N. Kelley-Loughnane;Marc R. Knecht
中科院分区：
文献类型：
--
作者：
Maichong Xie;J. Slocik;N. Kelley-Loughnane;Marc R. Knecht
无机胶体纳米颗粒因其提高的表面积与体积比而以其高效的催化反应活性而闻名。作为传统合成方法的替代方法，仿生方法可以持续生成稳定的胶体纳米颗粒，其反应性可以通过生物分子覆盖层结构进行调节。最近的研究表明，将光激活光开关纳入材料结合肽中，可用于光学地、可逆地切换金纳米粒子表面上的生物分子覆盖层结构，这对材料的催化反应性具有显着的影响。在这篇文章中，我们证明了这些材料的光学光开关能力和催化反应性高度依赖于生物分子覆盖层的组成。为此，制备了混合单层封端的金纳米粒子，其中母体材料结合肽和包含光开关的肽的比例是不同的。确定了与肽的光开关能力及其总体反应性相关的关键趋势，其中仅使用光开关肽制备的材料的反应性较慢。总而言之，这些结果表明，金纳米粒子上的覆盖层结构的组成对于调整这些材料的整体光学、光开关和催化性能非常重要，并且可用于改进其预期应用的结构性能。
Inorganic colloidal nanoparticles are known for their efficient catalytic reactivities due to their enhanced surface-to-volume ratio. As an alternative to conventional synthetic methods, bioinspired approaches can sustainably generate stable colloidal nanoparticles where their reactivity can be tuned by the biomolecular overlayer structure. Recent studies have shown that incorporation of light-activated photoswitches into material-binding peptides could be used to optically and reversibly switch the biomolecular overlayer structure on Au nanoparticle surfaces, which has significant ramifications on the material catalytic reactivity. In this contribution, we demonstrate that the optical photoswitching capability and catalytic reactivity in these materials are highly dependent upon the composition of the biomolecular overlayer. For this, mixed monolayer-capped Au nanoparticles were prepared where the ratio of the parent material-binding peptide and the peptide with photoswitch included were varied. Key trends related to the photoswitching capability of the peptides and their overall reactivity were identified, where slower reactivity was noted for materials prepared using only the photoswitchable peptide. Taken together, these results demonstrate that the composition of the overlayer structure on Au nanoparticles is highly important in tuning the overall optical, photoswitching, and catalytic properties of these materials and can be used to refine the properties of the structure for their intended application.