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Hydrated Ionic Liquids Boost the Trace Detection Capacity of Proteins on TiO2 Support

文献类型：期刊论文

作者Dong, Yihui6; Laaksonen, Aatto2,3,4,5; Huo, Feng6; Gao, Qingwei1,7; Ji, Xiaoyan2
刊名LANGMUIR
出版日期2021-04-27
卷号37期号:16页码:5012-5021
ISSN号0743-7463
DOI10.1021/acs.langmuir.1c00525
英文摘要Trace detection based on surface-enhanced Raman scattering (SERS) has attracted considerable attention, and exploiting efficient strategies to stretch the limit of detection and understanding the mechanisms on molecular level are of utmost importance. In this work, we use ionic liquids (ILs) as trace additives in a protein-TiO2 system, allowing us to obtain an exceptionally low limit of detection down to 10(-9) M. The enhancement factors (EFs) were determined to 2.30 x 10(4), 6.17 x 10(4), and 1.19 x 10(5), for the three systems: one without ILs, one with ILs in solutions, and one with ILs immobilized on the TiO2 substrate, respectively, corresponding to the molecular forces of 1.65, 1.32, and 1.16 nN quantified by the atomic force microscopy. The dissociation and following hydration of ILs, occurring in the SERS system, weakened the molecular forces but instead improved the electron transfer ability of ILs, which is the major contribution for the observed excellent detection. The weaker diffusion of the hydrated IL ions immobilized on the TiO2 substrate did provide a considerably greater EF value, compared to the ILs in the solution. This work clearly demonstrates the importance of the hydration of ions, causing an improved electron transfer ability of ILs and leading to an exceptional SERS performance in the field of trace detection. Our results should stimulate further development to use ILs in SERS and related applications in bioanalysis, medical diagnosis, and environmental science.
WOS关键词ENHANCED RAMAN-SCATTERING ; HIGH-RESOLUTION ; IN-SITU ; SERS ; NANOTUBES ; NANOPARTICLES ; ORIENTATION ; ADSORPTION ; BEHAVIOR ; SENSOR
资助项目National Natural Science Foundation of China[22078321] ; National Natural Science Foundation of China[21878295] ; Swedish Research Council ; Ministry of Research and Innovation of Romania (CNCS - UEFISCDI)[PN-III-P4-ID-PCCF-2016-0050]
WOS研究方向Chemistry ; Materials Science
语种英语
WOS记录号WOS:000645431900027
出版者AMER CHEMICAL SOC
资助机构National Natural Science Foundation of China ; Swedish Research Council ; Ministry of Research and Innovation of Romania (CNCS - UEFISCDI)
源URL[http://ir.ipe.ac.cn/handle/122111/48762]  
专题中国科学院过程工程研究所
通讯作者Dong, Yihui; Ji, Xiaoyan
作者单位1.East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China
2.Lulea Univ Technol, Div Energy Sci, Energy Engn, S-97187 Lulea, Sweden
3.Stockholm Univ, Dept Mat & Environm Chem, Arrhenius Lab, SE-10691 Stockholm, Sweden
4.Nanjing Tech Univ, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Peoples R China
5.Petru Poni Inst Macromol Chem, Ctr Adv Res Bionanoconjugates & Biopolymers, Iasi 700487, Romania
6.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc,CAS Key La, Beijing 100190, Peoples R China
7.East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China
推荐引用方式
GB/T 7714		 Dong, Yihui,Laaksonen, Aatto,Huo, Feng,et al. Hydrated Ionic Liquids Boost the Trace Detection Capacity of Proteins on TiO2 Support[J]. LANGMUIR,2021,37(16):5012-5021.
APA Dong, Yihui,Laaksonen, Aatto,Huo, Feng,Gao, Qingwei,&Ji, Xiaoyan.(2021).Hydrated Ionic Liquids Boost the Trace Detection Capacity of Proteins on TiO2 Support.LANGMUIR,37(16),5012-5021.
MLA Dong, Yihui,et al."Hydrated Ionic Liquids Boost the Trace Detection Capacity of Proteins on TiO2 Support".LANGMUIR 37.16(2021):5012-5021.

入库方式： OAI收割

来源：过程工程研究所

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