Resolved Infrared Spectroscopy of Aqueous Molecules Employing Tunable Graphene Plasmons in an Otto Prism
文献类型：期刊论文
| 作者 | Nong, Jinpeng1,3; Wei, Wei1,3; Lan, Guilian1; Luo, Peng1; Guo, Caicheng1; Yi, Juemin2; Tang, Linlong3
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| 刊名 | ANALYTICAL CHEMISTRY
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| 出版日期 | 2020-12-01 |
| 卷号 | 92期号:23页码:15370-15378 |
| ISSN号 | 0003-2700 |
| DOI | 10.1021/acs.analchem.0c02733 |
| 通讯作者 | Wei, Wei(wwei@cqu.edu.cn) |
| 英文摘要 | Real time and in situ detection of aqueous solution is essential for bioanalysis and chemical reactions. However, it is extremely challenging for infrared microscopic measurement because of the large background of water absorption. Here, we proposed a wideband-tunable graphene plasmonic infrared biosensor to detect biomolecules in an aqueous environment, employing attenuated total reflection in an Otto prism configuration and tightly confined plasmons in graphene nanoribbons. Benefiting from the graphene plasmonic electric field enhancement, such a biosensor is able to identify the molecular chemical fingerprints without the interference of water absorption. As a proof of concept, the recombinant protein AG and goat anti-mouse immunoglobulin G (IgG) are used as the sensing analytes, of which the vibrational modes (1669 and 1532 cm(-1)) are very close to the OH-bending mode of water (1640 cm(-1)). Simulation results show that the fingerprints of protein molecules in the water environment can be selectively enhanced. Therefore, the water absorption is successfully suppressed so that two protein modes can be resolved by sweeping graphene Fermi energy in a wide waveband. By further optimizing the incident angle and graphene mobility to improve the mode energy of graphene plasmons, maximum enhancement factors of 112 and 130 can be achieved for amide I and II bands. Our work provides an effective approach for the highly sensitive and selective in situ identification of aqueous-phase molecular fingerprints in fields of healthcare, food safety, and biochemical sensing. |
| 资助项目 | National Natural Science Foundation of China[61875025] ; National Natural Science Foundation of China[61675037] ; Natural Science Foundation of Chongqing[cstc2020jcyj-jqX0015] ; Chongqing Research Program of Basic Research and Frontier Technology[cstc2017jcyjBX0048] ; Chongqing Research Program of Basic Research and Frontier Technology[cstc2017jcyjBX0054] ; Fundamental Research Funds for the Central Universities[2018CDQYGD0022] ; Fundamental Research Funds for the Central Universities[cqu2018CDHB1B03] |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000596727600016 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/12704]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Wei, Wei |
| 作者单位 | 1.Chongqing Univ, Coll Optoelect Engn, Key Lab Optoelect Technol & Syst, Minist Educ China, Chongqing 400044, Peoples R China 2.Carl von Ossietzky Univ Oldenburg, Inst Phys, D-26111 Oldenburg, Germany 3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing Key Lab Multiscale Mfg Technol, Chongqing 400714, Peoples R China |
| 推荐引用方式 GB/T 7714 | Nong, Jinpeng,Wei, Wei,Lan, Guilian,et al. Resolved Infrared Spectroscopy of Aqueous Molecules Employing Tunable Graphene Plasmons in an Otto Prism[J]. ANALYTICAL CHEMISTRY,2020,92(23):15370-15378. |
| APA | Nong, Jinpeng.,Wei, Wei.,Lan, Guilian.,Luo, Peng.,Guo, Caicheng.,...&Tang, Linlong.(2020).Resolved Infrared Spectroscopy of Aqueous Molecules Employing Tunable Graphene Plasmons in an Otto Prism.ANALYTICAL CHEMISTRY,92(23),15370-15378. |
| MLA | Nong, Jinpeng,et al."Resolved Infrared Spectroscopy of Aqueous Molecules Employing Tunable Graphene Plasmons in an Otto Prism".ANALYTICAL CHEMISTRY 92.23(2020):15370-15378. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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