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Leong SX, Tan EX, Han X, Luhung I, Aung NW, Nguyen LBT, Tan SY, Li H, Phang IY, Schuster S, Ling XY. Surface-Enhanced Raman Scattering-Based Surface Chemotaxonomy: Combining Bacteria Extracellular Matrices and Machine Learning for Rapid and Universal Species Identification. ACS NANO 2023; 17:23132-23143. [PMID: 37955967 DOI: 10.1021/acsnano.3c09101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Rapid, universal, and accurate identification of bacteria in their natural states is necessary for on-site environmental monitoring and fundamental microbial research. Surface-enhanced Raman scattering (SERS) spectroscopy emerges as an attractive tool due to its molecule-specific spectral fingerprinting and multiplexing capabilities, as well as portability and speed of readout. Here, we develop a SERS-based surface chemotaxonomy that uses bacterial extracellular matrices (ECMs) as proxy biosignatures to hierarchically classify bacteria based on their shared surface biochemical characteristics to eventually identify six distinct bacterial species at >98% classification accuracy. Corroborating with in silico simulations, we establish a three-way inter-relation between the bacteria identity, their ECM surface characteristics, and their SERS spectral fingerprints. The SERS spectra effectively capture multitiered surface biochemical insights including ensemble surface characteristics, e.g., charge and biochemical profiles, and molecular-level information, e.g., types and numbers of functional groups. Our surface chemotaxonomy thus offers an orthogonal taxonomic definition to traditional classification methods and is achieved without gene amplification, biochemical testing, or specific biomarker recognition, which holds great promise for point-of-need applications and microbial research.
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Affiliation(s)
- Shi Xuan Leong
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Emily Xi Tan
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Xuemei Han
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Irvan Luhung
- Singapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551
| | - Ngu War Aung
- Singapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551
| | - Lam Bang Thanh Nguyen
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Si Yan Tan
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Haitao Li
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, People's Republic of China
| | - In Yee Phang
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Stephan Schuster
- Singapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551
| | - Xing Yi Ling
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People's Republic of China
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Perumal J, Lee P, Dev K, Lim HQ, Dinish US, Olivo M. Machine Learning Assisted Real-Time Label-Free SERS Diagnoses of Malignant Pleural Effusion due to Lung Cancer. BIOSENSORS 2022; 12:940. [PMID: 36354448 PMCID: PMC9688333 DOI: 10.3390/bios12110940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 10/08/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
More than half of all pleural effusions are due to malignancy of which lung cancer is the main cause. Pleural effusions can complicate the course of pneumonia, pulmonary tuberculosis, or underlying systemic disease. We explore the application of label-free surface-enhanced Raman spectroscopy (SERS) as a point of care (POC) diagnostic tool to identify if pleural effusions are due to lung cancer or to other causes (controls). Lung cancer samples showed specific SERS spectral signatures such as the position and intensity of the Raman band in different wave number region using a novel silver coated silicon nanopillar (SCSNP) as a SERS substrate. We report a classification accuracy of 85% along with a sensitivity and specificity of 87% and 83%, respectively, for the detection of lung cancer over control pleural fluid samples with a receiver operating characteristics (ROC) area under curve value of 0.93 using a PLS-DA binary classifier to distinguish between lung cancer over control subjects. We have also evaluated discriminative wavenumber bands responsible for the distinction between the two classes with the help of a variable importance in projection (VIP) score. We found that our label-free SERS platform was able to distinguish lung cancer from pleural effusions due to other causes (controls) with higher diagnostic accuracy.
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Affiliation(s)
- Jayakumar Perumal
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A*STAR), Singapore 138667, Singapore
| | - Pyng Lee
- Respiratory and Critical Care Medicine, National University Hospital, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
| | - Kapil Dev
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A*STAR), Singapore 138667, Singapore
| | - Hann Qian Lim
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A*STAR), Singapore 138667, Singapore
| | - U. S. Dinish
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A*STAR), Singapore 138667, Singapore
| | - Malini Olivo
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science, Technology and Research (A*STAR), Singapore 138667, Singapore
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Dai B, Xu Y, Wang T, Wang S, Tang L, Tang J. Recent Advances in Agglomeration Detection and Dual-Function Application of Surface-Enhanced Raman Scattering (SERS). J Biomed Nanotechnol 2022. [DOI: 10.1166/jbn.2022.3356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Surface-enhanced Raman scattering (SERS) has been widely utilized in early detection of disease biomarkers, cell imaging, and trace contamination detection, owing to its ultra-high sensitivity. However, it is also subject to certain application restrictions in virtue of its expensive
detection equipment and long-term stability of SERS-active substrate. Recently, great progress has been made in SERS technology, represented by agglomeration method. Dual readout signal detection methods are combined with SERS, including electrochemical detection, fluorescence detection, etc.,
establishing a new fantastic viewpoint for application of SERS. In this review, we have made a comprehensive report on development of agglomeration detection and dual-function detection methods based on SERS. The synthesis methods for plasmonic materials and mainstream SERS enhancement mechanism
are also summarized. Finally, the key facing challenges are discussed and prospects are addressed.
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Affiliation(s)
- Bailin Dai
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, National & Local Joint Engineering Research Center for Advanced Packaging Material and Technology, Hunan University of Technology, Zhuzhou 412007, P. R. China
| | - Yue Xu
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, National & Local Joint Engineering Research Center for Advanced Packaging Material and Technology, Hunan University of Technology, Zhuzhou 412007, P. R. China
| | - Tao Wang
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, National & Local Joint Engineering Research Center for Advanced Packaging Material and Technology, Hunan University of Technology, Zhuzhou 412007, P. R. China
| | - Shasha Wang
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610065, Sichuan, P. R. China
| | - Li Tang
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, National & Local Joint Engineering Research Center for Advanced Packaging Material and Technology, Hunan University of Technology, Zhuzhou 412007, P. R. China
| | - Jianxin Tang
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, National & Local Joint Engineering Research Center for Advanced Packaging Material and Technology, Hunan University of Technology, Zhuzhou 412007, P. R. China
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4
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Perumal J, Lim HQ, Attia ABE, Raziq R, Leavesley DI, Upton Z, Dinish US, Olivo M. Novel Cellulose Fibre-Based Flexible Plasmonic Membrane for Point-of-Care SERS Biomarker Detection in Chronic Wound Healing. Int J Nanomedicine 2021; 16:5869-5878. [PMID: 34483659 PMCID: PMC8408532 DOI: 10.2147/ijn.s303130] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 05/06/2021] [Indexed: 12/26/2022] Open
Abstract
Background Wound management is stretching the limits of health systems globally, challenging clinicians to evaluate the effectiveness of their treatments and deliver appropriate care to their patients. Visual inspection and manual measurement of wound size are subjective, often inaccurate and inconsistent. Growth factors, such as pro-inflammatory cytokines and proteases, play important roles in cutaneous wound healing. However, little is known about the point-of-care monitoring of the changes in such markers during the healing process. Here, we explore the capability of surface-enhanced Raman spectroscopy (SERS) as a viable point-of-care platform to monitor the changes of these surrogate indicators of healing status in chronic wounds. Methods We developed a biofunctionalized flexible, cost-effective, scalable and easy-to-fabricate plasmonic SERS substrate using cellulose fibre (CF), which is used for sensing of wound markers based on a modified immunoassay method. Results We evaluated and selected the reliable silver nano-island thickness that will be sputtered onto the CF-based substrate for the highest SERS enhancement. Using this biofunctionalized SERS substrate, we detected varying concentrations of MMP-9 (10–5000 ng/mL) and TNF-α (5–100 ng/mL) proteins to model the wound exudates. This SERS detection method demonstrates a linear response within biologically relevant concentrations, ranging from 10 to 500 ng/mL for MMP-9 and 5 to 25 ng/mL for TNF-α for these surrogate indicators. Conclusion Our SERS sensing platform achieved detection limits in the µM to sub-nM range and displayed high sensitivity and selectivity. This could result in a cheap, point-of-care device that provides a non-invasive measure of cutaneous wound healing in real time. We envision that these flexible substrates after activation may be incorporated into wound dressings in future for routine monitoring of wound healing status.
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Affiliation(s)
- Jayakumar Perumal
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science Technology and Research (ASTAR), Singapore
| | - Hann Qian Lim
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science Technology and Research (ASTAR), Singapore
| | - Amalina Binte Ebrahim Attia
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science Technology and Research (ASTAR), Singapore
| | - Riazul Raziq
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science Technology and Research (ASTAR), Singapore
| | - David Ian Leavesley
- Skin Research Institute of Singapore, Agency for Science, Technology and Research (ASTAR), Singapore
| | - Zee Upton
- Skin Research Institute of Singapore, Agency for Science, Technology and Research (ASTAR), Singapore
| | - U S Dinish
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science Technology and Research (ASTAR), Singapore
| | - Malini Olivo
- Translational Biophotonics Laboratory, Institute of Bioengineering and Bioimaging, Agency for Science Technology and Research (ASTAR), Singapore
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5
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Zhu W, Hutchison JA, Dong M, Li M. Frequency Shift Surface-Enhanced Raman Spectroscopy Sensing: An Ultrasensitive Multiplex Assay for Biomarkers in Human Health. ACS Sens 2021; 6:1704-1716. [PMID: 33939402 DOI: 10.1021/acssensors.1c00393] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The sensitive and selective detection of biomarkers for human health remains one of the grand challenges of the analytical sciences. Compared to established methods (colorimetric, (chemi) luminescent), surface-enhanced Raman spectroscopy (SERS) is an emerging alternative with enormous potential for ultrasensitive biological detection. Indeed even attomolar (10-18 M) detection limits are possible for SERS due to an orders-of-magnitude boosting of Raman signals at the surface of metallic nanostructures by surface plasmons. However, challenges remain for SERS assays of large biomolecules, as the largest enhancements require the biomarker to enter a "hot spot" nanogap between metal nanostructures. The frequency-shift SERS method has gained popularity in recent years as an alternative assay that overcomes this drawback. It measures frequency shifts in intense SERS peaks of a Raman reporter during binding events on biomolecules (protein coupling, DNA hybridization, etc.) driven by mechanical transduction, charge transfer, or local electric field effects. As such, it retains the excellent multiplexing capability of SERS, with multiple analytes being identifiable by a spectral fingerprint in a single read-out. Meanwhile, like refractive index surface plasmon resonance methods, frequency-shift SERS measures the shift of an intense signal rather than resolving a peak above noise, easing spectroscopic resolution requirements. SERS frequency-shift assays have proved particularly suitable for sensing large, highly charged biomolecules that alter hydrogen-bonding networks upon specific binding. Herein we discuss the frequency-shift SERS method and promising applications in (multiplex) biomarker sensing as well as extensions to ion and gas sensing and much more.
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Affiliation(s)
- Wenfeng Zhu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100049, China
- Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China
| | - James Andell Hutchison
- School of Chemistry, University of Melbourne, 30 Flemington Road, Parkville 3052, Victoria, Australia
| | - Mingdong Dong
- Interdisciplinary Nanoscience Center, Aarhus University, Aarhus C 8000, Denmark
| | - Min Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100049, China
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6
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Xia Y, Padmanabhan P, Sarangapani S, Gulyás B, Vadakke Matham M. Bifunctional Fluorescent/Raman Nanoprobe for the Early Detection of Amyloid. Sci Rep 2019; 9:8497. [PMID: 31186449 PMCID: PMC6560097 DOI: 10.1038/s41598-019-43288-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 03/27/2019] [Indexed: 11/09/2022] Open
Abstract
One of the pathological hallmarks of Alzheimer's disease (AD) is the abnormal aggregation of amyloid beta (Aβ) peptides. Therefore the detection of Aβ peptides and imaging of amyloid plaques are considered as promising diagnostic methods for AD. Here we report a bifunctional nanoprobe prepared by conjugating gold nanoparticles (AuNPs) with Rose Bengal (RB) dye. RB is chosen due to its unique Raman fingerprints and affinity with Aβ peptides. After the conjugation, Raman signals of RB were significantly enhanced due to the surface-enhanced Raman scattering (SERS) effect. Upon binding with Aβ42 peptides, a spectrum change was detected, and the magnitude of the spectrum changes can be correlated with the concentration of target peptides. The peptide/probe interaction also induced a remarkable enhancement in the probes' fluorescence emission. This fluorescence enhancement was further utilized to image amyloid plaques in the brain slices from transgenic mice. In this study, the RB-AuNPs were used for both SERS-based detection of Aβ42 peptides and fluorescence-based imaging of amyloid plaques. Compared to monofunctional probes, the multifunctional probe is capable to provide more comprehensive pathophysiological information, and therefore, the implementation of such multifunctional amyloid probes is expected to help the investigation of amyloid aggregation and the early diagnosis of AD.
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Affiliation(s)
- Yang Xia
- School of Mechanical and Aerospace Engineering, Center for Optical and Laser Engineering (COLE), Nanyang Technological University (NTU), Singapore, 639798, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore, 637553, Singapore
| | - Parasuraman Padmanabhan
- Lee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore, 637553, Singapore.
| | - Sreelatha Sarangapani
- School of Mechanical and Aerospace Engineering, Center for Optical and Laser Engineering (COLE), Nanyang Technological University (NTU), Singapore, 639798, Singapore
| | - Balázs Gulyás
- Lee Kong Chian School of Medicine, Nanyang Technological University (NTU), Singapore, 637553, Singapore
| | - Murukeshan Vadakke Matham
- School of Mechanical and Aerospace Engineering, Center for Optical and Laser Engineering (COLE), Nanyang Technological University (NTU), Singapore, 639798, Singapore.
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7
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Liszewska M, Budner B, Norek M, Jankiewicz BJ, Nyga P. Revisiting semicontinuous silver films as surface-enhanced Raman spectroscopy substrates. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2019; 10:1048-1055. [PMID: 31165031 PMCID: PMC6541363 DOI: 10.3762/bjnano.10.105] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Accepted: 05/05/2019] [Indexed: 05/26/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is a very promising analytical technique for the detection and identification of trace amounts of analytes. Among the many substrates used in SERS of great interest are nanostructures fabricated using physical methods, such as semicontinuous metal films obtained via electron beam physical vapor deposition. In these studies, we investigate the influence of morphology of semicontinuous silver films on their SERS properties. The morphologies studied ranged from isolated particles through percolated films to almost continuous films. We found that films below the percolation threshold (transition from dielectric-like to metal-like) made of isolated silver structures provided the largest SERS enhancement of 4-aminothiophenol (4-ATP) analyte signals. The substrate closest to the percolation threshold has the SERS signal about four times lower than the highest signal sample.
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Affiliation(s)
- Malwina Liszewska
- Institute of Optoelectronics, Military University of Technology, 2 gen. Sylwestra Kaliskiego Street, 00–908 Warsaw, Poland
| | - Bogusław Budner
- Institute of Optoelectronics, Military University of Technology, 2 gen. Sylwestra Kaliskiego Street, 00–908 Warsaw, Poland
| | - Małgorzata Norek
- Faculty of Advanced Technologies and Chemistry, Military University of Technology, 2 gen. Sylwestra Kaliskiego Street, 00–908 Warsaw, Poland
| | - Bartłomiej J Jankiewicz
- Institute of Optoelectronics, Military University of Technology, 2 gen. Sylwestra Kaliskiego Street, 00–908 Warsaw, Poland
| | - Piotr Nyga
- Institute of Optoelectronics, Military University of Technology, 2 gen. Sylwestra Kaliskiego Street, 00–908 Warsaw, Poland
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8
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Rice D, Mouras R, Gleeson M, Liu N, Tofail SAM, Soulimane T, Silien C. APTES Duality and Nanopore Seed Regulation in Homogeneous and Nanoscale-Controlled Reduction of Ag Shell on SiO 2 Microparticle for Quantifiable Single Particle SERS. ACS OMEGA 2018; 3:13028-13035. [PMID: 31458023 PMCID: PMC6644844 DOI: 10.1021/acsomega.8b01247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 08/28/2018] [Indexed: 05/10/2023]
Abstract
Noble-metal nanoparticles size and packing density are critical for sensitive surface-enhanced Raman scattering (SERS) and controlled preparation of such films required to achieve reproducibility. Provided that they are made reliable, Ag shell on SiO2 microscopic particles (Ag/SiO2) are promising candidates for lab-on-a-bead analytical measurements of low analyte concentration in liquid specimen. Here, we selected nanoporous silica microparticles as a substrate for reduction of AgNO3 with 3-aminopropyltriethoxysilane (APTES). In a single preparation step, homogeneous and continuous films of Ag nanoparticles are formed on SiO2 surfaces with equimolar concentration of APTES and silver nitrate in ethanol. It is discussed that amine and silane moieties in APTES contribute first to an efficient reduction on the silica and second to capping the Ag nanoparticles. The high density and homogeneity of nanoparticle nucleation is further regulated by the nanoporosity of the silica. The Ag/SiO2 microparticles were tested for SERS using self-assembled 4-aminothiophenol monolayers, and an enhancement factor of ca. 2 × 106 is measured. Importantly, the SERS relative standard deviation is 36% when a single microparticle is considered and drops to 11% when sets of 10 microparticles are considered. As prepared, the microparticles are highly suitable for state-of-the-art quantitative lab-on-a-bead interrogation of specimens.
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Affiliation(s)
- Daragh Rice
- Department
of Physics & Bernal Institute and Department of Chemical Sciences
& Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Rabah Mouras
- Department
of Physics & Bernal Institute and Department of Chemical Sciences
& Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Matthew Gleeson
- Department
of Physics & Bernal Institute and Department of Chemical Sciences
& Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Ning Liu
- Department
of Physics & Bernal Institute and Department of Chemical Sciences
& Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Syed A. M. Tofail
- Department
of Physics & Bernal Institute and Department of Chemical Sciences
& Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Tewfik Soulimane
- Department
of Physics & Bernal Institute and Department of Chemical Sciences
& Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Christophe Silien
- Department
of Physics & Bernal Institute and Department of Chemical Sciences
& Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
- E-mail:
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9
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Haji Abdolvahab R, Zamani Meymian MR. Theoretical and experimental analyses of the deposited silver thin films. SURF INTERFACE ANAL 2018. [DOI: 10.1002/sia.6381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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10
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Frydendahl C, Repän T, Geisler M, Novikov SM, Beermann J, Lavrinenko AV, Xiao S, Bozhevolnyi SI, Mortensen NA, Stenger N. Optical reconfiguration and polarization control in semi-continuous gold films close to the percolation threshold. NANOSCALE 2017; 9:12014-12024. [PMID: 28795742 DOI: 10.1039/c7nr03378h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Controlling and confining light by exciting plasmons in resonant metallic nanostructures is an essential aspect of many new emerging optical technologies. Here we explore the possibility of controllably reconfiguring the intrinsic optical properties of semi-continuous gold films, by inducing permanent morphological changes with a femtosecond (fs)-pulsed laser above a critical power. Optical transmission spectroscopy measurements show a correlation between the spectra of the morphologically modified films and the wavelength, polarization, and the intensity of the laser used for alteration. In order to understand the modifications induced by the laser writing, we explore the near-field properties of these films with electron energy-loss spectroscopy (EELS). A comparison between our experimental data and full-wave simulations on the exact film morphologies hints toward a restructuring of the intrinsic plasmonic eigenmodes of the metallic film by photothermal effects. We explain these optical changes with a simple model and demonstrate experimentally that laser writing can be used to controllably modify the optical properties of these semi-continuous films. These metal films offer an easy-to-fabricate and scalable platform for technological applications such as molecular sensing and ultra-dense data storage.
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Affiliation(s)
- Christian Frydendahl
- Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads 343, DK-2800 Kongens Lyngby, Denmark.
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11
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Xu K, Wang Z, Tan CF, Kang N, Chen L, Ren L, Thian ES, Ho GW, Ji R, Hong M. Uniaxially Stretched Flexible Surface Plasmon Resonance Film for Versatile Surface Enhanced Raman Scattering Diagnostics. ACS APPLIED MATERIALS & INTERFACES 2017; 9:26341-26349. [PMID: 28704040 DOI: 10.1021/acsami.7b06669] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy affords a rapid, highly sensitive, and nondestructive approach for label-free and fingerprint diagnosis of a wide range of chemicals. It is of great significance to develop large-area, uniform, and environmentally friendly SERS substrates for in situ identification of analytes on complex topological surfaces. In this work, we demonstrate a biodegradable flexible SERS film via irreversibly and longitudinally stretching metal deposited biocompatible poly(ε-caprolactone) film. This composite film after stretching shows surprising phenomena: three-dimensional and periodic wave-shaped microribbons array embedded with a high density of nanogaps functioning as hot-spots at an average gap size of 20 nm and nanogrooves array along the stretching direction. The stretched polymer surface plasmon resonance film gives rise to more than 10 times signal enhancement in comparison with that of the unstretched composite film. Furthermore, the SERS signals with high uniformity exhibit good temperature stability. The polymer SPR film with excellent flexibility and transparency can be conformally attached onto arbitrary nonplanar surfaces for in situ detection of various chemicals. Our results pave a new way for next-generation flexible SERS detection means, as well as enabling its huge potentials toward green wearable devices for point-of-care diagnostics.
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Affiliation(s)
- Kaichen Xu
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, 117576, Singapore
- Data Storage Institute, (A*STAR) Agency for Science Technology and Research , 2 Fusionopolis Way, 138634, Singapore
| | - Zuyong Wang
- College of Materials Science and Engineering, Hunan University , Changsha, 410082, China
| | - Chuan Fu Tan
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, 117576, Singapore
| | - Ning Kang
- Department of Biomaterials, College of Materials, Xiamen University , Xiamen, 361005, China
| | - Lianwei Chen
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, 117576, Singapore
| | - Lei Ren
- Department of Biomaterials, College of Materials, Xiamen University , Xiamen, 361005, China
| | - Eng San Thian
- Department of Mechanical Engineering, National University of Singapore , 9 Engineering Drive 1, Singapore 117576, Singapore
| | - Ghim Wei Ho
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, 117576, Singapore
| | - Rong Ji
- Data Storage Institute, (A*STAR) Agency for Science Technology and Research , 2 Fusionopolis Way, 138634, Singapore
| | - Minghui Hong
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, 117576, Singapore
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12
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Huang LC, Wang Z, Clark JK, Ho YL, Delaunay JJ. Plasmonic tooth-multilayer structure with high enhancement field for surface enhanced Raman spectroscopy. NANOTECHNOLOGY 2017; 28:125206. [PMID: 28170345 DOI: 10.1088/1361-6528/aa5ebf] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The significant enhancement seen in surface-enhanced Raman scattering (SERS) heavily relies on the ability of plasmonic structures to strongly confine light. Current techniques used to fabricate plasmonic nanostructures have been limited in their reproducibility for bottom-up techniques or their feature size for top-down techniques. Here, we propose a tooth multilayer structure that can be fabricated by using physical vapor deposition and selective wet etching, achieving extremely small feature sizes and high reproducibility. A multilayer structure composed of two alternating materials whose thicknesses can be controlled accurately in the nanometer range is deposited on a flat substrate using ion-beam sputtering. Subsequent selective wet etching is used to form nanogaps in one of the materials constituting the multilayer, with the depth of the nanogaps being controlled by the wet etching time. Combining both techniques can allow the nanogap dimensions to be controlled at sub 10 nm length scale, thus achieving a tooth multilayer structure with high enhancement and tunability of the resonance mode over a broad range, ideal for SERS applications.
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Affiliation(s)
- Li-Chung Huang
- School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
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13
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Xing Y, Wyss A, Esser N, Dittrich PS. Label-free biosensors based on in situ formed and functionalized microwires in microfluidic devices. Analyst 2016; 140:7896-901. [PMID: 26469763 DOI: 10.1039/c5an01240f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Label-free biosensors based on in situ formed and functionalized TTF-Au wires were developed using an integrated microfluidic system. By applying different modification protocols, TTF-Au wires were successfully used for sensitive label-free detection of catecholamines and human IgG by Raman spectroscopy.
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Affiliation(s)
- Yanlong Xing
- Department of Chemistry and Applied Biosciences, ETH Zürich, Switzerland. and SALSA graduate school, Humboldt-Universität zu Berlin, Germany
| | - Andreas Wyss
- Laboratory for Nanometallurgy, Department of Materials, ETH Zürich, Switzerland
| | - Norbert Esser
- Leibniz-Institute for Analytical Sciences, ISAS Berlin, Germany
| | - Petra S Dittrich
- Department of Chemistry and Applied Biosciences, ETH Zürich, Switzerland.
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14
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Freeman LM, Smolyaninov A, Pang L, Fainman Y. Simulated Raman correlation spectroscopy for quantifying nucleic acid-silver composites. Sci Rep 2016; 6:23535. [PMID: 27010074 PMCID: PMC4806353 DOI: 10.1038/srep23535] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 03/08/2016] [Indexed: 01/20/2023] Open
Abstract
Plasmonic devices are of great interest due to their ability to confine light to the nanoscale level and dramatically increase the intensity of the electromagnetic field, functioning as high performance platforms for Raman signal enhancement. While Raman spectroscopy has been proposed as a tool to identify the preferential binding sites and adsorption configurations of molecules to nanoparticles, the results have been limited by the assumption that a single binding site is responsible for molecular adsorption. Here, we develop the simulated Raman correlation spectroscopy (SRCS) process to determine which binding sites of a molecule preferentially bind to a plasmonic material and in what capacity. We apply the method to the case of nucleic acids binding to silver, discovering that multiple atoms are responsible for adsorption kinetics. This method can be applied to future systems, such as to study the molecular orientation of adsorbates to films or protein conformation upon adsorption.
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Affiliation(s)
- Lindsay M Freeman
- Department of Electrical and Computer Engineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0407, USA
| | - Alexei Smolyaninov
- Department of Electrical and Computer Engineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0407, USA
| | - Lin Pang
- Department of Electrical and Computer Engineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0407, USA
| | - Yeshaiahu Fainman
- Department of Electrical and Computer Engineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0407, USA
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15
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Gkogkou D, Schreiber B, Shaykhutdinov T, Ly HK, Kuhlmann U, Gernert U, Facsko S, Hildebrandt P, Esser N, Hinrichs K, Weidinger IM, Oates TWH. Polarization- and Wavelength-Dependent Surface-Enhanced Raman Spectroscopy Using Optically Anisotropic Rippled Substrates for Sensing. ACS Sens 2016. [DOI: 10.1021/acssensors.5b00176] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dimitra Gkogkou
- Humboldt-Universität zu Berlin, School of Analytical Sciences
Adlershof (SALSA), IRIS-Building,
Unter den Linden 6, D-10099 Berlin, Germany
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., ISAS Berlin, Schwarzschildstr. 8, D-12489 Berlin, Germany
| | - Benjamin Schreiber
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., D-01314 Dresden, Germany
| | - Timur Shaykhutdinov
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., ISAS Berlin, Schwarzschildstr. 8, D-12489 Berlin, Germany
| | | | | | | | - Stefan Facsko
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V., D-01314 Dresden, Germany
| | | | - Norbert Esser
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., ISAS Berlin, Schwarzschildstr. 8, D-12489 Berlin, Germany
| | - Karsten Hinrichs
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., ISAS Berlin, Schwarzschildstr. 8, D-12489 Berlin, Germany
| | | | - Thomas W. H. Oates
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., ISAS Berlin, Schwarzschildstr. 8, D-12489 Berlin, Germany
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16
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Tang B, Wang J, Hutchison JA, Ma L, Zhang N, Guo H, Hu Z, Li M, Zhao Y. Ultrasensitive, Multiplex Raman Frequency Shift Immunoassay of Liver Cancer Biomarkers in Physiological Media. ACS NANO 2016; 10:871-9. [PMID: 26731464 DOI: 10.1021/acsnano.5b06007] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Highly sensitive multiplex biomarker detection is critical for the early diagnosis of liver cancer. Here, a surface-enhanced Raman scattering (SERS) frequency-shift immunoassay is developed for detection of liver cancer biomarkers α-fetoprotein and Glypican-3 down to subpicomolar concentrations in saline solution. A high temperature modification of the Tollen's method affords silver nanoparticle films with excellent SERS response upon which ordered domains of Raman reporters are chemisorbed by microcontact printing. Shifts in the reporters SERS spectrum in response to a bound antibody's biomarker recognition constitutes the frequency shift assay, exhibiting here exceptional sensitivity and specificity and shown to function in fetal calf serum and in the serum of a patient with hepatocellular carcinoma.
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Affiliation(s)
- Bochong Tang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , 19B, Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Jiaojiao Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , 19B, Yuquan Road, Shijingshan District, Beijing 100049, China
- College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences , 19A, Yuquan Road, Shijingshan District, Beijing 100049, China
| | - James A Hutchison
- ISIS & icFRC, University of Strasbourg and CNRS , 8 allée Gaspard Monge, 67000 Strasbourg, France
- School of Chemistry and Bio21 Institute, University of Melbourne , Victoria 3010, Australia
| | - Lei Ma
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , 19B, Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Ning Zhang
- Department of Cancer Cell Biology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy , Tianjin 300060, China
| | - Hua Guo
- Department of Cancer Cell Biology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy , Tianjin 300060, China
| | - Zhongbo Hu
- College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences , 19A, Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Min Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , 19B, Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Yuliang Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences , 19B, Yuquan Road, Shijingshan District, Beijing 100049, China
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17
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Ukahapunyakul P, Gridsadanurak N, Sapcharoenkun C, Treetong A, Kasamechonchung P, Khemthong P, Horprathum M, Porntheeraphat S, Wongwiriyapan W, Nukeaw J, Klamchuen A. Texture orientation of silver thin films grown via gas-timing radio frequency magnetron sputtering and their SERS activity. RSC Adv 2016. [DOI: 10.1039/c5ra20390b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Here we have demonstrated the special technique so called gas-timing (GT) rf magnetron sputtering which allow us to control a texture orientation of Ag thin films without applying any additional energy sources.
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Affiliation(s)
- Pongbordin Ukahapunyakul
- Department of Chemical Engineering
- Faculty of Engineering
- Thammasat University
- Thailand
- Center of Excellence in Environmental Catalysis and Adsorption
| | - Nurak Gridsadanurak
- Department of Chemical Engineering
- Faculty of Engineering
- Thammasat University
- Thailand
- Center of Excellence in Environmental Catalysis and Adsorption
| | | | - Alongkot Treetong
- National Nanotechnology Center (NANOTEC)
- NSTDA
- Thailand Science Park
- Thailand
| | | | | | - Mati Horprathum
- National Electronics and Computer Technology Center (NECTEC)
- NSTDA
- Thailand
| | | | - Winadda Wongwiriyapan
- College of Nanotechnology
- King Mongkut's Institute of Technology Ladkrabang
- Bangkok 10520
- Thailand
| | - Jiti Nukeaw
- College of Nanotechnology
- King Mongkut's Institute of Technology Ladkrabang
- Bangkok 10520
- Thailand
| | - Annop Klamchuen
- National Nanotechnology Center (NANOTEC)
- NSTDA
- Thailand Science Park
- Thailand
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18
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Lengert E, Yashchenok AM, Atkin V, Lapanje A, Gorin DA, Sukhorukov GB, Parakhonskiy BV. Hollow silver alginate microspheres for drug delivery and surface enhanced Raman scattering detection. RSC Adv 2016. [DOI: 10.1039/c6ra02019d] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Multifunctional silver alginate hydrogel microspheres are assembled via a template assisted approach using calcium carbonate cores.
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Affiliation(s)
- Ekaterina Lengert
- Remote Controlled Theranostic Systems Lab
- Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - Alexey M. Yashchenok
- Remote Controlled Theranostic Systems Lab
- Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - Vsevolod Atkin
- Remote Controlled Theranostic Systems Lab
- Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - Ales Lapanje
- Remote Controlled Theranostic Systems Lab
- Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - Dmitry A. Gorin
- Remote Controlled Theranostic Systems Lab
- Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - Gleb B. Sukhorukov
- School of Engineering and Materials Science
- Queen Mary University of London
- London
- UK
| | - Bogdan V. Parakhonskiy
- Remote Controlled Theranostic Systems Lab
- Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
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19
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Prikhozhdenko ES, Atkin VS, Parakhonskiy BV, Rybkin IA, Lapanje A, Sukhorukov GB, Gorin DA, Yashchenok AM. New post-processing method of preparing nanofibrous SERS substrates with a high density of silver nanoparticles. RSC Adv 2016. [DOI: 10.1039/c6ra18636j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The protocol to control density of AgNP on surfaces of nanofibers, and thus electromagnetic hotspots by variation of Tollens' reagent is established. Nanofiber films enable SERS either of solutes or macromolecular structures such as bacterial cells.
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Affiliation(s)
- E. S. Prikhozhdenko
- Remote Controlled Theranostic Systems Lab
- Educational Research Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - V. S. Atkin
- Educational Research Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - B. V. Parakhonskiy
- Remote Controlled Theranostic Systems Lab
- Educational Research Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - I. A. Rybkin
- Remote Controlled Theranostic Systems Lab
- Educational Research Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - A. Lapanje
- Remote Controlled Theranostic Systems Lab
- Educational Research Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - G. B. Sukhorukov
- School of Engineering and Materials Science
- Queen Mary University of London
- London
- UK
- RASA Center in St. Petersburg
| | - D. A. Gorin
- Remote Controlled Theranostic Systems Lab
- Educational Research Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
| | - A. M. Yashchenok
- Remote Controlled Theranostic Systems Lab
- Educational Research Institute of Nanostructures and Biosystem
- Saratov State University
- Saratov
- Russia
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20
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Zeng Z, Liu Y, Wei J. Recent advances in surface-enhanced raman spectroscopy (SERS): Finite-difference time-domain (FDTD) method for SERS and sensing applications. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.06.009] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Owens P, Phillipson N, Perumal J, O'Connor GM, Olivo M. Sensing of p53 and EGFR Biomarkers Using High Efficiency SERS Substrates. BIOSENSORS 2015; 5:664-77. [PMID: 26516922 PMCID: PMC4697139 DOI: 10.3390/bios5040664] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 10/08/2015] [Accepted: 10/20/2015] [Indexed: 02/05/2023]
Abstract
In this paper we describe a method for the determination of protein concentration using Surface Enhanced Raman Resonance Scattering (SERRS) immunoassays. We use two different Raman active linkers, 4-aminothiophenol and 6-mercaptopurine, to bind to a high sensitivity SERS substrate and investigate the influence of varying concentrations of p53 and EGFR on the Raman spectra. Perturbations in the spectra are due to the influence of protein-antibody binding on Raman linker molecules and are attributed to small changes in localised mechanical stress, which are enhanced by SERRS. These influences are greatest for peaks due to the C-S functional group and the Full Width Half Maximum (FWHM) was found to be inversely proportional to protein concentration.
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Affiliation(s)
- Peter Owens
- Centre for Microscopy and Imaging, National University Ireland, University Road, Galway, Ireland.
| | - Nigel Phillipson
- School of Physics, National University Ireland, University Road, Galway, Ireland.
| | - Jayakumar Perumal
- Bio-Optical Imaging Group, Singapore Bioimaging Consortium, Agency for Science Technology and Research (A*STAR), 11 Biopolis Way, #02-02 Helios 138667, Singapore.
| | - Gerard M O'Connor
- School of Physics, National University Ireland, University Road, Galway, Ireland.
| | - Malini Olivo
- Bio-Optical Imaging Group, Singapore Bioimaging Consortium, Agency for Science Technology and Research (A*STAR), 11 Biopolis Way, #02-02 Helios 138667, Singapore.
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22
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Chen Y, Chen ZP, Zuo Q, Shi CX, Yu RQ. Surface-enhanced Raman spectroscopy based on conical holed enhancing substrates. Anal Chim Acta 2015; 887:45-50. [DOI: 10.1016/j.aca.2015.07.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 06/07/2015] [Accepted: 07/04/2015] [Indexed: 10/23/2022]
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23
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Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity. Sci Rep 2015; 5:11644. [PMID: 26119106 PMCID: PMC5155581 DOI: 10.1038/srep11644] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 05/22/2015] [Indexed: 11/09/2022] Open
Abstract
In this paper we evaluate the effect of roughness and thickness of silver film substrates, fabricated on glass and polydimethylsiloxane (PDMS) templates, on surface-enhanced Raman Spectroscopy (SERS) activity. While the silver substrates obtained on glass templates exhibit nm-scale roughness, the silver substrates on PDMS templates show larger roughness, on the order of 10 s of nm. These roughness values do not change significantly with the thickness of the silver film. The SERS intensities of 4-aminothiophenol (ATP) deposited on these substrates strongly depend on both roughness and thickness, with more significant contribution from the roughness on thinner films. FEM simulations of the electric field intensities on surfaces of different thicknesses for rough and flat surfaces suggest higher localized plamons on thinner, rough surfaces. This study indicates that, besides roughness, the thickness of the metallic layer plays a significant role in the SERS activity.
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24
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Guerrini L, Arenal R, Mannini B, Chiti F, Pini R, Matteini P, Alvarez-Puebla RA. SERS Detection of Amyloid Oligomers on Metallorganic-Decorated Plasmonic Beads. ACS APPLIED MATERIALS & INTERFACES 2015; 7:9420-9428. [PMID: 25897657 DOI: 10.1021/acsami.5b01056] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Protein misfolded proteins are among the most toxic endogenous species of macromolecules. These chemical entities are responsible for neurodegenerative disorders such as Alzheimer's, Parkinson's, Creutzfeldt-Jakob's and different non-neurophatic amyloidosis. Notably, these oligomers show a combination of marked heterogeneity and low abundance in body fluids, which have prevented a reliable detection by immunological methods so far. Herein we exploit the selectivity of proteins to react with metallic ions and the sensitivity of surface-enhanced Raman spectroscopy (SERS) toward small electronic changes in coordination compounds to design and engineer a reliable optical sensor for protein misfolded oligomers. Our strategy relies on the functionalization of Au nanoparticle-decorated polystyrene beads with an effective metallorganic Raman chemoreceptor, composed by Al(3+) ions coordinated to 4-mercaptobenzoic acid (MBA) with high Raman cross-section, that selectively binds aberrant protein oligomers. The mechanical deformations of the MBA phenyl ring upon complexation with the oligomeric species are registered in its SERS spectrum and can be quantitatively correlated with the concentration of the target biomolecule. The SERS platform used here appears promising for future implementation of diagnostic tools of aberrant species associated with protein deposition diseases, including those with a strong social and economic impact, such as Alzheimer's and Parkinson's diseases.
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Affiliation(s)
- Luca Guerrini
- †Universitat Rovira i Virgili and Centro de Tecnologia Quimica de Cataluña, C/de Marcel·lí Domingo s/n, N5, 43007 Tarragona, Spain
- ‡Medcom Advance SA, Viladecans Busines Park, Edificio Brasil, C/Bertran i Musitu, 83-85, 08840 Viladecans, Barcelona, Spain
| | - Raul Arenal
- §Laboratorio de Microscopias Avanzadas (LMA), Instituto de Nanociencia de Aragon (INA), Universidad de Zaragoza, 50018 Zaragoza, Spain
- ∥Fundación ARAID, 50018 Zaragoza, Spain
| | - Benedetta Mannini
- ⊥Department of Biomedical Experimental and Clinical Sciences, University of Florence, 50134 Florence, Italy
| | - Fabrizio Chiti
- ⊥Department of Biomedical Experimental and Clinical Sciences, University of Florence, 50134 Florence, Italy
| | - Roberto Pini
- #Institute of Applied Physics Nello Carrara, National Research Council, via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Paolo Matteini
- #Institute of Applied Physics Nello Carrara, National Research Council, via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Ramon A Alvarez-Puebla
- †Universitat Rovira i Virgili and Centro de Tecnologia Quimica de Cataluña, C/de Marcel·lí Domingo s/n, N5, 43007 Tarragona, Spain
- ‡Medcom Advance SA, Viladecans Busines Park, Edificio Brasil, C/Bertran i Musitu, 83-85, 08840 Viladecans, Barcelona, Spain
- ○ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain
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25
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Xu S, Wang J, Zou Y, Liu H, Wang G, Zhang X, Jiang S, Li Z, Cao D, Tang R. High performance SERS active substrates fabricated by directly growing graphene on Ag nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra18333b] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
An efficient surface enhanced Raman scattering (SERS) substrate of graphene-isolated Ag nanoparticle (G/AgNP) has been developed by using excimer laser to ablate the ordered pyrolytic graphite in high vacuum onto Ag nanoparticles.
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26
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Nitta S, Yamamoto A, Kurita M, Arakawa R, Kawasaki H. Gold-decorated titania nanotube arrays as dual-functional platform for surface-enhanced Raman spectroscopy and surface-assisted laser desorption/ionization mass spectrometry. ACS APPLIED MATERIALS & INTERFACES 2014; 6:8387-8395. [PMID: 24731133 DOI: 10.1021/am501291d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this report, we demonstrate gold-decorated titania nanotube arrays (Au-TNA substrate) as a dual-functional platform for surface-enhanced Raman spectroscopy (SERS) and surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS). The Au nanoparticles are grown on the substrate using vapor deposition of Au. The resulting substrates perform better than Au colloids in terms of the reproducibility of the SERS measurements, long-term stability of the fabricated structures, and clean surface of the Au. The nanostructure of the Au-TNA substrate was designed to optimize the SALDI-MS and SERS performance. Excellent reproducibility of the SERS measurements using the Au-TNA substrate was obtained, with a standard error less than 6 %. SALDI activity was also demonstrated for the same Au-TNA substrates. Finally, the Au-TNA substrate was used for combined SERS and SALDI-MS analysis (i) to discriminate the structural isomers of pyridine compounds (para-, meta-, and ortho-pyridinecarboxylic acid) and (ii) to detect polycarbamate, a dithiocarbamate fungicide. These results are difficult to obtain using either approach alone.
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Affiliation(s)
- Syuhei Nitta
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University , 3-3-35 Yamate-cho, Suita-shi, Osaka 564-8680, Japan
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27
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Huang Q, Wen S, Zhu X. Synthesis and characterization of an AgI/Ag hybrid nanocomposite with surface-enhanced Raman scattering performance and photocatalytic activity. RSC Adv 2014. [DOI: 10.1039/c4ra04639k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel AgI/Ag hybrid nanocomposites with good SERS performance and excellent photocatalytic activity were prepared.
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Affiliation(s)
- Qingli Huang
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou 225009, China
| | - Shengping Wen
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou 225009, China
| | - Xiashi Zhu
- College of Chemistry & Chemical Engineering
- Yangzhou University
- Yangzhou 225009, China
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