Zhou Xilin, Chen Huan, Zhang Baobao, Zhang Chengyun, Zhang Min, Xi Lei, Li Jinyu, Fu Zhengkun, Zheng Hairong
School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China.
School of Electronic Engineering, Xi'an University of Posts & Telecommunications, Xi'an 710121, China.
Nanomaterials (Basel). 2023 Feb 28;13(5):907. doi: 10.3390/nano13050907.
The plasmonic photothermal effects of metal nanostructures have recently become a new priority of studies in the field of nano-optics. Controllable plasmonic nanostructures with a wide range of responses are crucial for effective photothermal effects and their applications. In this work, self-assembled aluminum nano-islands (Al NIs) with a thin alumina layer are designed as a plasmonic photothermal structure to achieve nanocrystal transformation via multi-wavelength excitation. The plasmonic photothermal effects can be controlled by the thickness of the AlO and the intensity and wavelength of the laser illumination. In addition, Al NIs with an alumina layer have good photothermal conversion efficiency even in low temperature environments, and the efficiency will not decline significantly after storage in air for 3 months. Such an inexpensive Al/AlO structure with a multi-wavelength response provides an efficient platform for rapid nanocrystal transformation and a potential application for the wide-band absorption of solar energy.
金属纳米结构的表面等离子体光热效应最近已成为纳米光学领域研究的新重点。具有广泛响应的可控表面等离子体纳米结构对于有效的光热效应及其应用至关重要。在这项工作中，具有薄氧化铝层的自组装铝纳米岛（Al NIs）被设计为表面等离子体光热结构，以通过多波长激发实现纳米晶体转变。表面等离子体光热效应可以通过AlO的厚度以及激光照射的强度和波长来控制。此外，具有氧化铝层的Al NIs即使在低温环境下也具有良好的光热转换效率，并且在空气中储存3个月后效率不会显著下降。这种具有多波长响应的廉价Al/AlO结构为快速纳米晶体转变提供了一个高效平台，并为太阳能的宽带吸收提供了潜在应用。
