Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100049, P. R. China.
University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
Nano Lett. 2024 Sep 4;24(35):11082-11089. doi: 10.1021/acs.nanolett.4c03254. Epub 2024 Aug 22.
Nanoparticle superlattices are beneficial in terms of providing strong and uniform signals in analysis owing to their closely packed uniform structures. However, nanoparticle superlattices are prone to cracking during physical activities because of stress concentrations, which hinders their detection performance and limits their analytical applications. In this work, template printing methods were used in this study to prepare a patterned gold nanoparticle (AuNP) superlattice film. By adjustment of the size of the AuNP superlattice domain below the critical size of fracture, the mechanical stability of the AuNP superlattice domain is improved. Thus, long-term sustainable high-performance signal output is achieved. The patterned AuNP superlattice film was used to construct a wearable sweat sensor based on surface-enhanced Raman scattering (SERS). The designed sensor showed promise for long-term reliable use in actual scenarios in terms of recommending water replenishment, monitoring hydration states, and tracking the intensity of activity.
纳米粒子超晶格由于其紧密堆积的均匀结构，在分析中提供强而均匀的信号方面是有益的。然而，由于应力集中，纳米粒子超晶格在物理活动中容易出现裂纹，这会阻碍其检测性能并限制其分析应用。在这项工作中，模板印刷方法被用于制备图案化的金纳米粒子（AuNP）超晶格膜。通过将 AuNP 超晶格畴的尺寸调整到低于断裂的临界尺寸以下，可以提高 AuNP 超晶格畴的机械稳定性。因此，可以实现长期可持续的高性能信号输出。所设计的图案化 AuNP 超晶格膜被用于构建基于表面增强拉曼散射（SERS）的可穿戴汗液传感器。从推荐补水、监测水合状态和跟踪活动强度等方面来看，所设计的传感器有望在实际场景中实现长期可靠的使用。
