He Jiaqing, Villa Nicolò Simone, Luo Zhen, An Shun, Shen Qingchen, Tao Peng, Song Chengyi, Wu Jianbo, Deng Tao, Shang Wen
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University 800 Dong Chuan Road Shanghai 200240 P. R. China
Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano Piazza Leonardo Da Vinci 32 20133 Milano Italy.
RSC Adv. 2018 Sep 18;8(57):32395-32400. doi: 10.1039/c8ra05046e.
This work reports a bioinspired three-dimensional (3D) heterogeneous structure for optical hydrogen gas (H) sensing. The structure was fabricated by selective modification of the photonic architectures of butterfly wing scales with Pd nanostrips. The coupling of the plasmonic mode of the Pd nanostrips with the optical resonant mode of the biophotonic architectures generated a sharp reflectance peak in the spectra of the Pd-modified butterfly wing, as well as enhancement of light-matter interaction in Pd nanostrips. Exposure to H resulted in a rapid reversible increase in the reflectance of the Pd-modified butterfly wing, and the pronounced response of the reflectance was at the wavelength where the plasmonic mode strongly interplayed with the optical resonant mode. Owing to the synergetic effect of Pd nanostrips and biophotonic structures, the bioinspired sensor achieved an H detection limit of less than 10 ppm. Besides, the Pd-modified butterfly wing also exhibited good sensing repeatability. The results suggest that this approach provides a promising optical H sensing scheme, which may also offer the potential design of new nanoengineered structures for diverse sensing applications.
这项工作报道了一种用于光学氢气（H₂）传感的受生物启发的三维（3D）异质结构。该结构是通过用钯纳米条对蝴蝶翅膀鳞片的光子结构进行选择性修饰而制造的。钯纳米条的等离子体模式与生物光子结构的光学共振模式的耦合在钯修饰的蝴蝶翅膀光谱中产生了一个尖锐的反射峰，同时增强了钯纳米条中的光与物质相互作用。暴露于氢气中导致钯修饰的蝴蝶翅膀反射率迅速可逆增加，且反射率的显著响应出现在等离子体模式与光学共振模式强烈相互作用的波长处。由于钯纳米条和生物光子结构的协同效应，这种受生物启发的传感器实现了低于10 ppm的氢气检测限。此外，钯修饰的蝴蝶翅膀还表现出良好的传感重复性。结果表明，这种方法提供了一种有前景的光学氢气传感方案，这也可能为各种传感应用提供新型纳米工程结构的潜在设计。
