Yang Pengfei, Liang Yu, Zhang Daxiao, Ge Shaobo, Li Shijie, Liang Xichao, Zhang Jin, Xi Yingxue, Zhang Yan, Liu Weiguo
Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi'an Technological University, Xi'an 710032, China.
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.
Nanomaterials (Basel). 2023 Apr 3;13(7):1263. doi: 10.3390/nano13071263.
Silver nanopillars with strong plasmonic effects are used for localized electromagnetic field enhancement and regulation and have wide potential applications in sensing, bioimaging, and surface-enhanced spectroscopy. Normally, the controlled synthesis of silver nanopillars is mainly achieved using heterometallic nanoparticles, including Au nanobipyramids and Pd decahedra, as seeds for inducing nanostructure growth. However, the seed materials are usually doped in silver nanopillar products. Herein, the synthesis of pure silver nanopillars with hexagonal cross-sections is achieved by employing rebuildable silver nanoparticles as seeds. An environmentally friendly, stable, and reproducible synthetic route for obtaining silver nanopillars is proposed using sodium dodecyl sulfate as the surface stabilizer. Furthermore, the seed particles induce the formation of regular structures at different temperatures, and, specifically, room temperature is beneficial for the growth of nanopillars. The availability of silver nanoparticle seeds using sodium alginate as a carrier at different temperatures was verified. A reproducible method was developed to synthesize pure silver nanopillars from silver nanoparticles at room temperature, which can provide a strategy for designing plasmonic nanostructures for chemical and biological applications.
具有强等离子体效应的银纳米柱用于局部电磁场增强和调控，在传感、生物成像和表面增强光谱等方面具有广泛的潜在应用。通常，银纳米柱的可控合成主要通过使用异金属纳米粒子（包括金纳米双棱锥和钯十面体）作为诱导纳米结构生长的种子来实现。然而，种子材料通常会掺杂在银纳米柱产物中。在此，通过使用可重构银纳米粒子作为种子，实现了具有六边形横截面的纯银纳米柱的合成。提出了一种以十二烷基硫酸钠为表面稳定剂，获得银纳米柱的环境友好、稳定且可重复的合成路线。此外，种子颗粒在不同温度下诱导形成规则结构，具体而言，室温有利于纳米柱的生长。验证了以海藻酸钠为载体的银纳米粒子种子在不同温度下的可用性。开发了一种在室温下从银纳米粒子合成纯银纳米柱的可重复方法，这可为设计用于化学和生物应用的等离子体纳米结构提供一种策略。
