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Daly R, Narayan T, Diaz F, Shao H, Gutierrez Moreno JJ, Nolan M, O'Riordan A, Lovera P. Electrochemical synthesis of 2D-silver nanodendrites functionalized with cyclodextrin for SERS-based detection of herbicide MCPA. NANOTECHNOLOGY 2024; 35:285704. [PMID: 38522104 DOI: 10.1088/1361-6528/ad373c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 03/24/2024] [Indexed: 03/26/2024]
Abstract
Surface enhanced Raman spectroscopy (SERS) is a powerful analytical technique that has found application in the trace detection of a wide range of contaminants. In this paper, we report on the fabrication of 2D silver nanodendrites, on silicon chips, synthesized by electrochemical reduction of AgNO3at microelectrodes. The formation of nanodendrites is tentatively explained in terms of electromigration and diffusion of silver ions. Electrochemical characterization suggests that the nanodendrites do not stay electrically connected to the microelectrode. The substrates show SERS activity with an enhancement factor on the order of 106. Density functional theory simulations were carried out to investigate the suitability of the fabricated substrate for pesticide monitoring. These substrates can be functionalized with cyclodextrin macro molecules to help with the detection of molecules with low affinity with silver surfaces. A proof of concept is demonstrated with the detection of the herbicide 2-methyl-4-chlorophenoxyacetic acid (MCPA).
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Affiliation(s)
- Robert Daly
- Nanotechnology Group, Tyndall National Institute-University College Cork, T12 R5CP Cork, Ireland
| | - Tarun Narayan
- Nanotechnology Group, Tyndall National Institute-University College Cork, T12 R5CP Cork, Ireland
| | - Fernando Diaz
- Nanotechnology Group, Tyndall National Institute-University College Cork, T12 R5CP Cork, Ireland
| | - Han Shao
- Nanotechnology Group, Tyndall National Institute-University College Cork, T12 R5CP Cork, Ireland
| | - Jose Julio Gutierrez Moreno
- Materials Modelling for Devices Group, Tyndall National Institute, Lee Maltings, UCC, T12 R5CP Cork, Ireland
| | - Michael Nolan
- Materials Modelling for Devices Group, Tyndall National Institute, Lee Maltings, UCC, T12 R5CP Cork, Ireland
| | - Alan O'Riordan
- Nanotechnology Group, Tyndall National Institute-University College Cork, T12 R5CP Cork, Ireland
| | - Pierre Lovera
- Nanotechnology Group, Tyndall National Institute-University College Cork, T12 R5CP Cork, Ireland
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Pan X, Bai L, Pan C, Liu Z, Ramakrishna S. Design, Fabrication and Applications of Electrospun Nanofiber-Based Surface-Enhanced Raman Spectroscopy Substrate. Crit Rev Anal Chem 2021; 53:289-308. [PMID: 34284659 DOI: 10.1080/10408347.2021.1950522] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is an advanced and powerful analysis tool. Due to the advantages of high sensitivity, high resolution, and nondestructive testing, it has been widely used in physics, chemistry, material science and other fields. In recent years, substantial progress has been made in developing flexible platforms for the design and fabrication of SERS substrates. One important kind of the flexible platforms is based on electrospun nanofibers. Electrospun nanofibers not only have unique advantages such as easy preparation, high porosity and large specific surface area, but also can increase the number of hotspots when combined with precious metal nanomaterials, thereby enhancing the SERS signal and expanding the application scope. In this review, we firstly focus on two strategies for the fabrication of metal nanostructure decorated in/on the electrospun nanofibers, namely in-situ and ex-situ. Then the applications of these SERS substrates in the fields of quantitative analysis, monitoring chemical reactions and recyclable detection are introduced in detail. Finally, the challenges as well as perspectives are presented to offer a guideline for the future exploration of these SERS substrates. We expect that it will provide new inspiration for the development of electrospun nanofiber-based SERS substrates.
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Affiliation(s)
- Xue Pan
- School of Materials Science and Engineering, Ocean University of China, Qingdao, China
| | - Lu Bai
- Institute for Chemical Biology & Biosensing, and College of Life Sciences, Qingdao University, Qingdao, China
| | - Chengcheng Pan
- School of Materials Science and Engineering, Ocean University of China, Qingdao, China
| | - Zhicheng Liu
- School of Materials Science and Engineering, Ocean University of China, Qingdao, China.,Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore
| | - Seeram Ramakrishna
- Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore
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Hao Q, Li M, Wang J, Fan X, Jiang J, Wang X, Zhu M, Qiu T, Ma L, Chu PK, Schmidt OG. Flexible Surface-Enhanced Raman Scattering Chip: A Universal Platform for Real-Time Interfacial Molecular Analysis with Femtomolar Sensitivity. ACS APPLIED MATERIALS & INTERFACES 2020; 12:54174-54180. [PMID: 33205645 DOI: 10.1021/acsami.0c16315] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We propose and demonstrate a flexible surface-enhanced Raman scattering (SERS) chip as a versatile platform for femtomolar detection and real-time interfacial molecule analysis. The flexible SERS chip is composed of a flexible and transparent membrane and embedded plasmonic dimers with ultrahigh particle density and ultrasmall dimer gap. The chip enables rapid identification for residuals on solid substrates with irregular surfaces or dissolved analytes in aqueous solution. The sensitivity for liquid-state measurement is down to 0.06 molecule per dimers for 10-14 mol·L-1 Rhodamine 6G molecule without molecule enrichment. Strong signal fluctuation and blinking are observed at this concentration, indicating that the detection limit is close to the single-molecule level. Meanwhile, the homogeneous liquid environment facilities accurate SERS quantification of analytes with a wide dynamic range. The synergy of flexibility and liquid-state measurement opens up avenues for the real-time study of chemical reactions. The reduction from p-nitrothiophenol (PNTP) to p-aminothiophenol (PATP) in the absence of the chemical reducing agents is observed at liquid interfaces by in situ SERS measurements, and the plasmon-induced hot electron is demonstrated to drive the catalytic reaction. We believe this robust and feasible approach is promising in extending the SERS technique as a general method for identifying interfacial molecular traces, tracking the evolution of heterogeneous reactions, elucidating the reaction mechanisms, and evaluating the environmental effects such as pH value and salty ions in SERS.
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Affiliation(s)
- Qi Hao
- School of Physics, Southeast University, Nanjing 211189, P. R. China
- Quantum Information Research Center, Southeast University, Nanjing 211189, P. R. China
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, Dresden 01069, Germany
| | - Mingze Li
- School of Physics, Southeast University, Nanjing 211189, P. R. China
| | - Jiawei Wang
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, Dresden 01069, Germany
- Department of Electronic and Information Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, P. R. China
| | - Xingce Fan
- School of Physics, Southeast University, Nanjing 211189, P. R. China
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, Dresden 01069, Germany
| | - Jie Jiang
- School of Physics, Southeast University, Nanjing 211189, P. R. China
| | - Xiaoxia Wang
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, Dresden 01069, Germany
| | - Minshen Zhu
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, Dresden 01069, Germany
| | - Teng Qiu
- School of Physics, Southeast University, Nanjing 211189, P. R. China
| | - Libo Ma
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, Dresden 01069, Germany
| | - Paul K Chu
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, P. R. China
| | - Oliver G Schmidt
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, Dresden 01069, Germany
- Material Systems for Nanoelectronics, Technische Universität Chemnitz, Chemnitz 09111, Germany
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Suresh V, Yap FL. Flexible, transparent and robust SERS tapes through a two-step block copolymer self-assembly process. RSC Adv 2015. [DOI: 10.1039/c5ra09934j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
We demonstrate a simple and economical method for fabricating flexible, transparent and robust large area SERS-active tapes using a two-step process: the fabrication of gold nanoclusters on a flat chip and the transfer of the resulting metal nanoclusters onto a thermal tape.
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Affiliation(s)
- Vignesh Suresh
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology, and Research (A*STAR)
- Singapore 117602
| | - Fung Ling Yap
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology, and Research (A*STAR)
- Singapore 117602
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Yang H, Huang CZ. Polymethacrylic acid–facilitated nanofiber matrix loading Ag nanoparticles for SERS measurements. RSC Adv 2014. [DOI: 10.1039/c4ra05737f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
By introducing polymethacrylic acid (PMAA), fairly uniform PMAA/poly(N-vinylpyrrolidone) (PVP) ultrafine fibers containing silver nanoparticles (AgNPs) for SERS substrates were successfully prepared via electrospinning by means of in situ photoreduction of silver ions. This makes the detection results reproducible with RSD values below 0.2% through the SERS signals to detect malachite green (MG), a significant environmental organic pollutant, for its genotoxicity.
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Affiliation(s)
- Hui Yang
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715, China
| | - Cheng Zhi Huang
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University)
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715, China
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Wu MC, Lin MP, Chen SW, Lee PH, Li JH, Su WF. Surface-enhanced Raman scattering substrate based on a Ag coated monolayer array of SiO2 spheres for organic dye detection. RSC Adv 2014. [DOI: 10.1039/c3ra45255g] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Szymborski T, Witkowska E, Adamkiewicz W, Waluk J, Kamińska A. Electrospun polymer mat as a SERS platform for the immobilization and detection of bacteria from fluids. Analyst 2014; 139:5061-4. [DOI: 10.1039/c4an01137f] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new class of SERS substrates is presented that allows for the simultaneous filtration of bacteria from any solution (blood, urine, water, or milk), immobilization of bacteria on the SERS platform, and enhancing the Raman signal of bacteria.
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Affiliation(s)
- Tomasz Szymborski
- Institute of Physical Chemistry of the Polish Academy of Sciences
- 01-224 Warsaw, Poland
| | - Evelin Witkowska
- Institute of Physical Chemistry of the Polish Academy of Sciences
- 01-224 Warsaw, Poland
| | - Witold Adamkiewicz
- Institute of Physical Chemistry of the Polish Academy of Sciences
- 01-224 Warsaw, Poland
| | - Jacek Waluk
- Institute of Physical Chemistry of the Polish Academy of Sciences
- 01-224 Warsaw, Poland
| | - Agnieszka Kamińska
- Institute of Physical Chemistry of the Polish Academy of Sciences
- 01-224 Warsaw, Poland
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