The Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China.
The Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Nat Commun. 2017 Nov 16;8(1):1559. doi: 10.1038/s41467-017-00850-8.
Superthin nanostructures, particularly with atomic-level thicknesses, typically display unique optical properties because of their exceptional light-matter interactions. Here, we report a facile strategy for the synthesis of sulfur-doped molybdenum oxide nanorings with an atomic-level size (thickness of 0.5 nm) and a tunable ring-in-ring architecture. These atomic-level nanorings displayed strong photo-absorption in both the visible and infrared-light ranges and acted as a photothermal agent. Under irradiation with an 808 nm laser with an intensity of 1 W/cm, a composite of the nanorings embedded in polydimethylsiloxane showed an ultrafast photothermal effect, delivering a local temperature of up to 400 °C within 20 s, which to the best of our knowledge is the highest temperature by light irradiation reported to date. Meanwhile, the resulting nanorings were also employed as a photoinitiator to remotely induce a visible-light shape memory response, self-healing, reshaping performance and reversible actuation of dynamic three-dimensional structures. This study demonstrates an advancement towards controlling atomic-level-sized nanostructures and achieving greatly enhanced optical performances for optoelectronics.
超薄纳米结构，特别是具有原子级厚度的超薄纳米结构，由于其独特的光物质相互作用，通常表现出独特的光学性质。在这里，我们报告了一种简便的方法，用于合成具有原子级尺寸（厚度为 0.5nm）和可调环中环结构的硫掺杂氧化钼纳米环。这些原子级纳米环在可见光和红外光范围内表现出强烈的光吸收，并充当光热剂。在强度为 1W/cm 的 808nm 激光照射下，嵌入聚二甲基硅氧烷中的纳米环复合材料表现出超快的光热效应，在 20 秒内达到高达 400°C 的局部温度，据我们所知，这是迄今为止通过光照报道的最高温度。同时，所得的纳米环也可用作光引发剂，远程诱导可见光形状记忆响应、自修复、重塑性能和动态三维结构的可逆致动。本研究展示了在控制原子级尺寸纳米结构和实现光电应用中大幅增强光学性能方面的进展。
