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Xiong Y, Liu X, Wang K, Wang X, Wang X, Gao J, Yang H. An Omnidirectional Dual-Functional Metasurface with Ultrathin Thickness. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8378. [PMID: 36499873 PMCID: PMC9736169 DOI: 10.3390/ma15238378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/10/2022] [Accepted: 11/12/2022] [Indexed: 06/17/2023]
Abstract
Although metasurfaces have received enormous attention and are widely applied in various fields, the realization of multiple functions using a single metasurface is still rarely reported to date. In this work, we propose a novel dual-functional metasurface that can be applied as a mid-infrared narrowband thermal light source in optical gas sensing and a long-wave infrared broadband absorber in photodetection. By actively tailoring the structure and constituent materials of the metasurface, the device yields an absorptivity of over 90% from 8 µm to 14 µm, while it exhibits an emissivity of 97.4% at the center wavelength of 3.56 μm with a full width at half-maximum of 0.41 µm. Notably, the metasurface is insensitive to the incident angle under both TM- and TE-polarized light. The proposed dual-functional metasurface possesses many advantages, including a simple structure, thin thickness, angle and polarization insensitivity, and compatibility with optical devices, which are expected to simplify the existing imaging systems and improve the performance of photodetection equipment.
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Affiliation(s)
- Ying Xiong
- Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Xiaoyi Liu
- School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
- Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, China
| | - Kai Wang
- Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Xiaokun Wang
- Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
| | - Xiaoyi Wang
- Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
| | - Jinsong Gao
- Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
| | - Haigui Yang
- Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
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Zhu H, Xu W, Shan M, Yang T, Lin Q, Yu K, Xing Y, Yu Y. High-Throughput Color Imaging Hg2+ Sensing via Amalgamation-Mediated Shape Transition of Concave Cube Au Nanoparticles. NANOMATERIALS 2022; 12:nano12111902. [PMID: 35683757 PMCID: PMC9182504 DOI: 10.3390/nano12111902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 05/06/2022] [Accepted: 05/20/2022] [Indexed: 11/26/2022]
Abstract
Mercury, as one type of toxic heavy metal, represents a great threat to environmental and biological metabolic systems. Thus, reliable and sensitive quantitative detection of mercury levels is particularly meaningful for environmental protection and human health. We proposed a high-throughput single-particle color imaging strategy under dark-field microscopy (DFM) for mercury ions (Hg2+) detection by using individual concave cube Au nanoparticles as optical probes. In the presence of ascorbic acid (AA), Hg2+ was reduced to Hg which forms Au–Hg amalgamate with Au nanoparticles, altering their localized surface plasmon resonance (LSPR). Transmission electron microscopy (TEM) images demonstrated that the concave cube Au nanoparticles were approaching to sphere upon increasing the concentration of Hg2+. The nanoparticles underwent an obvious color change from red to yellow, green, and finally blue under DFM due to the shape-evolution and LSPR changes. In addition, we demonstrated for the first time that the LSPR of Au–Hg amalgamated below 400 nm. Inspired by the above-mentioned results, single-particle color variations were digitalized by converting the color image into RGB channels to obtain (green+blue)/red intensity ratios [(G+B)/R]. The concentration-dependence change was quantified by statistically analyzing the (G+B)/R ratios of a large number of particles. A linear range from 10 to 2000 nM (R2 = 0.972) and a limit of detection (LOD) of 1.857 nM were acquired. Furthermore, many other metal ions, like Cu2+, Cr3+, etc., did not interfere with Hg2+ detection. More importantly, Hg2+ content in industrial wastewater samples and in the inner regions of human HepG2 cells was determined, showing great potential for developing a single-particle color imaging sensor in complex biological samples using concave cube Au nanoparticles as optical probes.
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Affiliation(s)
- He Zhu
- National Engineering Laboratory for Rice and By-Products Further Processing, College of Food Science and Engineering, Central South University of Forestry & Technology, Changsha 410004, China; (H.Z.); (W.X.)
- Technology Center of Gaoqing Black Cattle Product Processing and Quality Improvement, College of Food Science and Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China; (M.S.); (Y.Y.)
- Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Facully of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Weizhen Xu
- National Engineering Laboratory for Rice and By-Products Further Processing, College of Food Science and Engineering, Central South University of Forestry & Technology, Changsha 410004, China; (H.Z.); (W.X.)
| | - Min Shan
- Technology Center of Gaoqing Black Cattle Product Processing and Quality Improvement, College of Food Science and Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China; (M.S.); (Y.Y.)
| | - Tao Yang
- National Engineering Laboratory for Rice and By-Products Further Processing, College of Food Science and Engineering, Central South University of Forestry & Technology, Changsha 410004, China; (H.Z.); (W.X.)
- Correspondence: (T.Y.); (Q.L.); (K.Y.); (Y.X.)
| | - Qinlu Lin
- National Engineering Laboratory for Rice and By-Products Further Processing, College of Food Science and Engineering, Central South University of Forestry & Technology, Changsha 410004, China; (H.Z.); (W.X.)
- Correspondence: (T.Y.); (Q.L.); (K.Y.); (Y.X.)
| | - Kexue Yu
- Technology Center of Gaoqing Black Cattle Product Processing and Quality Improvement, College of Food Science and Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China; (M.S.); (Y.Y.)
- Correspondence: (T.Y.); (Q.L.); (K.Y.); (Y.X.)
| | - Yanxia Xing
- Technology Center of Gaoqing Black Cattle Product Processing and Quality Improvement, College of Food Science and Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China; (M.S.); (Y.Y.)
- Correspondence: (T.Y.); (Q.L.); (K.Y.); (Y.X.)
| | - Yang Yu
- Technology Center of Gaoqing Black Cattle Product Processing and Quality Improvement, College of Food Science and Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China; (M.S.); (Y.Y.)
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