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Lee KY. Fabrication of a Confined Gold Nanoflower in a Si Hole via Solid-to-Solid Mass Transfer. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kang Yeol Lee
- Research Institute of Natural Science; Gyeongsang National University; Jinju 52828 Korea
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Tokonami S, Iida T. Review: Novel sensing strategies for bacterial detection based on active and passive methods driven by external field. Anal Chim Acta 2017; 988:1-16. [DOI: 10.1016/j.aca.2017.07.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 07/15/2017] [Accepted: 07/17/2017] [Indexed: 01/09/2023]
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Song L, Zhang L, Huang Y, Chen L, Zhang G, Shen Z, Zhang J, Xiao Z, Chen T. Amplifying the signal of localized surface plasmon resonance sensing for the sensitive detection of Escherichia coli O157:H7. Sci Rep 2017; 7:3288. [PMID: 28607374 PMCID: PMC5468277 DOI: 10.1038/s41598-017-03495-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 04/28/2017] [Indexed: 11/09/2022] Open
Abstract
Gold nanorods (Au NRs) based localized surface plasmon resonance (LSPR) sensors have been widely employed in various fields including biology, environment and food safety detection, but their size- and shape-dependent sensitivity limits their practical applications in sensing and biological detection. In our present work, we proposed an approach to maximally amplify the signal of Au NRs based LSPR sensing by coating an optimized thickness of mesoporous silica onto Au NRs. The plasmonic peaks of Au NRs@SiO2 with different shell thickness showed finely linear response to the change of surrounding refractive index. The optimized thickness of mesoporous silica of Au NRs@SiO2 not only provided high stability for LSPR sensor,but also displayed much higher sensitivity (390 nm/RIU) than values of Au NRs from previous reports. The obtained Au NRs@SiO2 based LSPR sensor was further used in practical application for selectively detection of the E. coli O157:H7, and the detection limit achieved 10 CFU, which is much lower than conventional methods such as electrochemical methods and lateral-flow immunochromatography.
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Affiliation(s)
- Liping Song
- Department of Chemistry, Huazhong Agricultural University, Wuhan, 430070, China.,Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, No. 1219 Zhongguan West Road, Ningbo, 315201, China
| | - Lei Zhang
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, No. 1219 Zhongguan West Road, Ningbo, 315201, China
| | - Youju Huang
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, No. 1219 Zhongguan West Road, Ningbo, 315201, China.
| | - Liming Chen
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, No. 1219 Zhongguan West Road, Ningbo, 315201, China
| | - Ganggang Zhang
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, No. 1219 Zhongguan West Road, Ningbo, 315201, China
| | - Zheyu Shen
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, No. 1219 Zhongguan West Road, Ningbo, 315201, China
| | - Jiawei Zhang
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, No. 1219 Zhongguan West Road, Ningbo, 315201, China
| | - Zhidong Xiao
- Department of Chemistry, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Tao Chen
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, No. 1219 Zhongguan West Road, Ningbo, 315201, China.
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Exploiting pH-Regulated Dimer-Tetramer Transformation of Concanavalin A to Develop Colorimetric Biosensing of Bacteria. Sci Rep 2017; 7:1452. [PMID: 28469128 PMCID: PMC5431225 DOI: 10.1038/s41598-017-01371-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 03/29/2017] [Indexed: 12/15/2022] Open
Abstract
Gold nanoparticles (AuNPs) aggregation-based colorimetric biosensing remains a challenge for bacteria due to their large size. Here we propose a novel colorimetric biosensor for rapid detection of Escherichia coli O157:H7 (E. coli O157:H7) in milk samples based on pH-regulated transformation of dimer/tetramer of Concanavalin A (Con A) and the Con A-glycosyl recognition. Briefly, antibody-modified magnetic nanoparticles was used to capture and concentrate E. coli O157:H7 and then to label with Con A; pH adjusted to 5 was then applied to dissociate Con A tetramer to release dimer, which was collected and re-formed tetramer at pH of 7 to cause the aggregation of dextran-modified AuNPs. The interesting pH-dependent conformation-transformation behavior of Con A innovated the design of the release from the bacteria surface and then the reconstruction of Con A. Therefore, we realized the sensitive colorimetric biosensing of bacteria, which are much larger than AuNPs that is generally not suitable for this kind of method. The proposed biosensor exhibited a limit of detection down to 41 CFU/mL, short assay time (~95 min) and satisfactory specificity. The biosensor also worked well for the detection in milk sample, and may provide a universal concept for the design of colorimetric biosensors for bacteria and virus.
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Wang H, Shan X, Yu H, Wang Y, Schmickler W, Chen HY, Tao N. Determining Electrochemical Surface Stress of Single Nanowires. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611297] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hui Wang
- State Key Laboratory of Analytical Chemistry for Life Science; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 China
| | - Xiaonan Shan
- Center for Bioelectronics and Biosensors, Biodesign Institute; Arizona State University; Tempe AZ 85287 USA
| | - Hui Yu
- Center for Bioelectronics and Biosensors, Biodesign Institute; Arizona State University; Tempe AZ 85287 USA
| | - Yan Wang
- Center for Bioelectronics and Biosensors, Biodesign Institute; Arizona State University; Tempe AZ 85287 USA
| | | | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 China
| | - Nongjian Tao
- State Key Laboratory of Analytical Chemistry for Life Science; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210093 China
- Center for Bioelectronics and Biosensors, Biodesign Institute; Arizona State University; Tempe AZ 85287 USA
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Lu X, Dandapat A, Huang Y, Zhang L, Rong Y, Dai L, Sasson Y, Zhang J, Chen T. Tris base assisted synthesis of monodispersed citrate-capped gold nanospheres with tunable size. RSC Adv 2016. [DOI: 10.1039/c6ra11189k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Tris base assisted synthesis of highly uniform citrate-capped gold nanospheres was achieved by controlling the mode of moderately fast nucleation.
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Affiliation(s)
- Xuefei Lu
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences
- Ningbo 315201
- China
- Department of Polymer Materials
| | - Anirban Dandapat
- Casali Center of Applied Chemistry
- Institute of Chemistry
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
| | - Youju Huang
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences
- Ningbo 315201
- China
| | - Lei Zhang
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences
- Ningbo 315201
- China
| | - Yun Rong
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences
- Ningbo 315201
- China
| | - Liwei Dai
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences
- Ningbo 315201
- China
| | - Yoel Sasson
- Casali Center of Applied Chemistry
- Institute of Chemistry
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
| | - Jiawei Zhang
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences
- Ningbo 315201
- China
| | - Tao Chen
- Division of Polymer and Composite Materials
- Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences
- Ningbo 315201
- China
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