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Tian T, Yi J, Liu Y, Li B, Liu Y, Qiao L, Zhang K, Liu B. Self-assembled plasmonic nanoarrays for enhanced bacterial identification and discrimination. Biosens Bioelectron 2022; 197:113778. [PMID: 34798500 DOI: 10.1016/j.bios.2021.113778] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 11/02/2021] [Accepted: 11/08/2021] [Indexed: 12/12/2022]
Abstract
The rapid and accurate bacterial testing is a critical step for the management of infectious diseases, but challenges remain largely due to a lack of advanced sensing tools. Here we report the development of highly plasmon-active, biofunctional nanoparticle arrays for simultaneous capture, identification, and differentiation of bacteria by surface-enhanced Raman scattering (SERS). The nanoarrays were facilely prepared through an electrostatic mechanism-controlled self-assembly of metallic nanoparticles at liquid-liquid interfaces, and exhibited high SERS sensitivity beyond femtomole, good reproducibility (relative standard deviation of 2.7%) and stability. Modification of the nanoarrays with concanavalin A allowed to effective capture of both Gram-positive and Gram-negative bacteria (bacterial-capture efficiency maintained beyond 50%) at bacterial concentrations ranging from 50 to 2000 CFU mL-1, as determined by the plate-counting method. Moreover, single-cell Raman fingerprinting and discrimination of eight different bacteria species with high signal-to-noise ratio, excellent spectral reproducibility, and a total assay time of 1.5 h was achieved under fairly mild conditions (24 μW, acquisition time: 1 s). Collectively, we believe that our biofunctionalized, SERS-based self-assembled nanoarrays have great potential to help in rapid and label-free bacterial diagnosis and phenotyping study.
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Affiliation(s)
- Tongtong Tian
- Department of Chemistry, Shanghai Stomatological Hospital, State Key Laboratory of Molecular Engineering of Polymers and Institute of Biomedical Sciences, Fudan University, Shanghai, 200433, China
| | - Jia Yi
- Department of Chemistry, Shanghai Stomatological Hospital, State Key Laboratory of Molecular Engineering of Polymers and Institute of Biomedical Sciences, Fudan University, Shanghai, 200433, China
| | - Yujie Liu
- Shanghai Institute for Pediatric Research, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Binxiao Li
- Department of Chemistry, Shanghai Stomatological Hospital, State Key Laboratory of Molecular Engineering of Polymers and Institute of Biomedical Sciences, Fudan University, Shanghai, 200433, China
| | - Yixin Liu
- Department of Chemistry, Shanghai Stomatological Hospital, State Key Laboratory of Molecular Engineering of Polymers and Institute of Biomedical Sciences, Fudan University, Shanghai, 200433, China
| | - Liang Qiao
- Department of Chemistry, Shanghai Stomatological Hospital, State Key Laboratory of Molecular Engineering of Polymers and Institute of Biomedical Sciences, Fudan University, Shanghai, 200433, China
| | - Kun Zhang
- Shanghai Institute for Pediatric Research, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
| | - Baohong Liu
- Shanghai Institute for Pediatric Research, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
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Chan TY, Liu TY, Wang KS, Tsai KT, Chen ZX, Chang YC, Tseng YQ, Wang CH, Wang JK, Wang YL. SERS Detection of Biomolecules by Highly Sensitive and Reproducible Raman-Enhancing Nanoparticle Array. Nanoscale Res Lett 2017; 12:344. [PMID: 28494572 PMCID: PMC5423882 DOI: 10.1186/s11671-017-2121-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 05/02/2017] [Indexed: 05/11/2023]
Abstract
This paper describes the preparation of nanoarrays composed of silver nanoparticles (AgNPs: 20-50 nm) for use as surface-enhanced Raman scattering (SERS) substrates. The AgNPs were grown on porous anodic aluminum oxide (AAO) templates by electrochemical plating, and the inter-channel gap of AAO channels is between 10 and 20 nm. The size and interparticle gap of silver particles were adjusted in order to achieve optimal SERS signals and characterized by scanning electron microscopy, atomic force microscopy, and Raman spectroscopy. The fluctuation of SERS intensity is about 10-20% when measuring adenine solutions, showing a great reproducible SERS sensing. The nanoparticle arrays offer a large potential for practical applications as shown by the SERS-based quantitative detection and differentiation of adenine (A), thymine (T), cytosine (C), guanine (G), β-carotene, and malachite green. The respective detection limits are <1 ppb for adenine and <0.63 ppm for β-carotene and malachite green, respectively. Uniform and reproducible Raman enhancement enabled by Ag nanoparticle array embedded in anodic aluminum oxide differentiates and helps quantify DNA canonical nucleobases (adenine, thymine, cytosine, and guanine).
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Affiliation(s)
- Tzu-Yi Chan
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 24301 Taiwan
| | - Ting-Yu Liu
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 24301 Taiwan
| | - Kuan-Syun Wang
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 24301 Taiwan
| | - Kun-Tong Tsai
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617 Taiwan
| | - Zhi-Xin Chen
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617 Taiwan
| | - Yu-Chi Chang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617 Taiwan
| | - Yi-Qun Tseng
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 24301 Taiwan
| | - Chih-Hao Wang
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 24301 Taiwan
| | - Juen-Kai Wang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617 Taiwan
- Center for Condensed Matter Sciences, National Taiwan University, Taipei, 10617 Taiwan
| | - Yuh-Lin Wang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617 Taiwan
- Department of Physics, National Taiwan University, Taipei, 10617 Taiwan
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