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Kanike C, Lu Q, Wu H, Unsworth LD, Atta A, Zhang X. Plasmonic Nanostructures Grown from Reacting Droplet-In-Microwell Array on Flexible Films for Quantitative Surface-Enhanced Raman Spectroscopy in Plant Wearable In Situ Detection. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2405576. [PMID: 39039736 DOI: 10.1002/adma.202405576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 06/20/2024] [Indexed: 07/24/2024]
Abstract
Plant wearable detection has garnered significant interest in advancing agricultural intelligence and promoting sustainable food production amidst the challenges of climate change. Accurately monitoring plant health and agrochemical residue levels necessitates qualities such as precision, affordability, simplicity, and noninvasiveness. Here, a novel attachable plasmonic film is introduced and designed for on-site detection of agrochemical residues utilizing surface-enhanced Raman spectroscopy (SERS). By functionalizing a thin polydimethylsiloxane film with silver nanoparticles via controlled droplet reactions in micro-well arrays, a plasmonic film is achieved that not only maintains optical transparency for precise analyte localization but also conforms closely to the plant surface, facilitating highly sensitive SERS measurements. The reliability of this film enables accurate identification and quantification of individual compounds and their mixtures, boasting an ultra-low detection limit ranging from 10-16 to 10-13 m, with mini mal relative standard deviation. To showcase its potential, on-field detection of pesticide residues on fruit surfaces is conducted using a handheld Raman spectrometer. This advancement in fabricating plasmonic nanostructures on flexible films holds promise for expanding SERS applications beyond plant monitoring, including personalized health monitoring, point-of-care diagnosis, wearable devices for human-machine interface, and on-site monitoring of environmental pollutants.
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Affiliation(s)
- Chiranjeevi Kanike
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
| | - Qiuyun Lu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Hongyan Wu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Larry D Unsworth
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
| | - Arnab Atta
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India
| | - Xuehua Zhang
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, T6G 1H9, Canada
- Physics of Fluids Group, Max Planck Center Twente for Complex Fluid Dynamics, JM Burgers Center for Fluid Dynamics, Mesa+, Department of Science and Technology, University of Twente, Enschede, NB, 7522, The Netherlands
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Zhao Y, Kumar A, Yang Y. Unveiling practical considerations for reliable and standardized SERS measurements: lessons from a comprehensive review of oblique angle deposition-fabricated silver nanorod array substrates. Chem Soc Rev 2024; 53:1004-1057. [PMID: 38116610 DOI: 10.1039/d3cs00540b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Recently, there has been an exponential growth in the number of publications focusing on surface-enhanced Raman scattering (SERS), primarily driven by advancements in nanotechnology and the increasing demand for chemical and biological detection. While many of these publications have focused on the development of new substrates and detection-based applications, there is a noticeable lack of attention given to various practical issues related to SERS measurements and detection. This review aims to fill this gap by utilizing silver nanorod (AgNR) SERS substrates fabricated through the oblique angle deposition method as an illustrative example. The review highlights and addresses a range of practical issues associated with SERS measurements and detection. These include the optimization of SERS substrates in terms of morphology and structural design, considerations for measurement configurations such as polarization and the incident angle of the excitation laser, and exploration of enhancement mechanisms encompassing both intrinsic properties induced by the structure and materials, as well as extrinsic factors arising from wetting/dewetting phenomena and analyte size. The manufacturing and storage aspects of SERS substrates, including scalable fabrication techniques, contamination control, cleaning procedures, and appropriate storage methods, are also discussed. Furthermore, the review delves into device design considerations, such as well arrays, flow cells, and fiber probes, and explores various sample preparation methods such as drop-cast and immersion. Measurement issues, including the effect of excitation laser wavelength and power, as well as the influence of buffer, are thoroughly examined. Additionally, the review discusses spectral analysis techniques, encompassing baseline removal, chemometric analysis, and machine learning approaches. The wide range of AgNR-based applications of SERS, across various fields, is also explored. Throughout the comprehensive review, key lessons learned from collective findings are outlined and analyzed, particularly in the context of detailed SERS measurements and standardization. The review also provides insights into future challenges and perspectives in the field of SERS. It is our hope that this comprehensive review will serve as a valuable reference for researchers seeking to embark on in-depth studies and applications involving their own SERS substrates.
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Affiliation(s)
- Yiping Zhao
- Department of Physics and Astronomy, The University of Georgia, Athens, GA 30602, USA.
| | - Amit Kumar
- Department of Physics and Astronomy, The University of Georgia, Athens, GA 30602, USA.
| | - Yanjun Yang
- School of Electrical and Computer Engineering, College of Engineering, The University of Georgia, Athens, GA 30602, USA.
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Joseph S, Rajpal S, Kar D, Devinder S, Pandey S, Mishra P, Joseph J. Guided mode resonance immunosensor for label-free detection of pathogenic bacteria Pseudomonas aeruginosa. Biosens Bioelectron 2023; 241:115695. [PMID: 37776624 DOI: 10.1016/j.bios.2023.115695] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 07/10/2023] [Accepted: 09/15/2023] [Indexed: 10/02/2023]
Abstract
Photonic biosensors are promising platforms for the rapid detection of pathogens with the potential to replace conventional diagnostics based on microbiological culturing methods. Intricately designed sensing elements with robust architectures can offer highly sensitive detection at minimal development cost enabling rapid adoption in low-resource settings. In this work, an optical detection scheme is developed by structuring guided mode resonance (GMR) on a highly stable, transparent silicon nitride (SiN) substrate and further biofunctionalized to identify a specific bacteria Pseudomonas aeruginosa. The resonance condition of the GMR chip is optimized to have relatively high bulk sensitivity with a good quality factor. The biofunctionalization aims at oriented immobilization of specific antibodies to allow maximum bacteria attachment and improved specificity. The sensitivity of the assays is evaluated for clinically relevant concentrations ranging from 102 to 108 CFU/mL. From the calibration curves, the sensitivity of the chip is extracted as 0.134nm/Log10 [concentration], and the detection modality possesses a favorably good limit of detection (LOD) 89 CFU/mL. The use of antibodies as a biorecognition element complemented with a good figure of merit of GMR sensing element allows selective bacteria identification compared to other non-specific pathogenic bacteria that are relevant for testing physiological samples. Our developed GMR biosensor is low-cost, easy to handle, and readily transformable into a portable handheld detection modality for remote usage.
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Affiliation(s)
- Shereena Joseph
- Department of Physics, Indian Institute of Technology Delhi, New Delhi, India
| | - Soumya Rajpal
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India
| | - Debashree Kar
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India
| | - Shital Devinder
- Centre for Sensors, Instruments and Cyber Physical System Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Saurabh Pandey
- Department of Physics, Indian Institute of Technology Delhi, New Delhi, India
| | - Prashant Mishra
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi, India
| | - Joby Joseph
- Department of Physics, Indian Institute of Technology Delhi, New Delhi, India; Optics and Photonics Centre, Indian Institute of Technology Delhi, New Delhi, India.
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Yoon J, Kim DH, Park SG, Kim SH. Micromolding-Assisted Production of SERS-Active Microcylinders for Size- and Charge-Selective Molecular Detection. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 38016084 DOI: 10.1021/acsami.3c11627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is an effective technique for amplifying the Raman signal of molecules by using metal nanostructures. However, these metal surfaces are susceptible to contamination by undesirable adhesives in complex mixtures, typically necessitating a time-consuming and costly sample pretreatment. In order to circumvent this, metal nanoparticles have been uniformly embedded within microgels by using microfluidics. In this work, we introduce a simple, scalable micromolding method for creating SERS-active cylindrical microgels designed to eliminate the need for pretreatment. These microcylinders are created through the simultaneous photoreduction and photo-cross-linking of precursor solutions. These solutions are optimized for consistent, high-intensity Raman signals as well as molecular size and charge selectivity. A sequential micromolding method is employed to design dual-compartment microcylinders, offering additional functionalities such as optical encoding, magnetoresponsiveness, and dual-charge selectivity. These SERS-active microcylinders provide robust Raman signals of small molecules, even in the presence of adhesive proteins, without compromising sensitivity. To demonstrate this capability, we directly detect pyocyanin in saliva and tartrazine in whole milk without any need for sample pretreatment.
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Affiliation(s)
- Jiwon Yoon
- Department of Chemical and Biomolecular Engineering (BK21+ Program), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Dong-Ho Kim
- Advanced Nano-Surface Department, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam 51508, Republic of Korea
| | - Sung-Gyu Park
- Advanced Nano-Surface Department, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam 51508, Republic of Korea
| | - Shin-Hyun Kim
- Department of Chemical and Biomolecular Engineering (BK21+ Program), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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Peng R, Zhang T, Yan S, Song Y, Liu X, Wang J. Recent Development and Applications of Stretchable SERS Substrates. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2968. [PMID: 37999322 PMCID: PMC10675327 DOI: 10.3390/nano13222968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/09/2023] [Accepted: 11/13/2023] [Indexed: 11/25/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is a cutting-edge technique for highly sensitive analysis of chemicals and molecules. Traditional SERS-active nanostructures are constructed on rigid substrates where the nanogaps providing hot-spots of Raman signals are fixed, and sample loading is unsatisfactory due to the unconformable attachment of substrates on irregular sample surfaces. A flexible SERS substrate enables conformable sample loading and, thus, highly sensitive Raman detection but still with limited detection capabilities. Stretchable SERS substrates with flexible sample loading structures and controllable hot-spot size provide a new strategy for improving the sample loading efficiency and SERS detection sensitivity. This review summarizes and discusses recent development and applications of the newly conceptual stretchable SERS substrates. A roadmap of the development of SERS substrates is reviewed, and fabrication techniques of stretchable SERS substrates are summarized, followed by an exhibition of the applications of these stretchable SERS substrates. Finally, challenges and perspectives of the stretchable SERS substrates are presented. This review provides an overview of the development of SERS substrates and sheds light on the design, fabrication, and application of stretchable SERS systems.
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Affiliation(s)
- Ran Peng
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China
| | - Tingting Zhang
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China
| | - Sheng Yan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Yongxin Song
- College of Marine Engineering, Dalian Maritime University, Dalian 116026, China
| | - Xinyu Liu
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada
| | - Junsheng Wang
- Department of Information Science and Technology, Dalian Maritime University, Dalian 116026, China
- Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, China
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6
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Tan Y, Yang K, Zhang X, Zhou Z, Xu Y, Xie A, Xue C. Stretchable and Flexible Micro-Nano Substrates for SERS Detection of Organic Dyes. ACS OMEGA 2023; 8:14541-14548. [PMID: 37125120 PMCID: PMC10134225 DOI: 10.1021/acsomega.3c00179] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/31/2023] [Indexed: 05/03/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is a precise and noninvasive analytical technique to identify vibrational fingerprints of trace analytes with sensitivity down to the single-molecule level. However, substrates can influence this capability, and current SERS techniques lack uniform, reproducible, and stable substrates to control plasma hot spots over a wide spectral range. Herein, we demonstrate a flexible SERS substrate via longitudinal stretching of a polydimethylsiloxane (PDMS) film. This substrate, after stretching and shrinking, exhibits an irregular wrinkled structure with abundant gaps and grooves that function as hot spots, thereby improving the hydrophobic properties of the material. To investigate the enhancement effect of Raman signals, silver nanoparticles (AgNPs) were mixed with Rhodamine 6G (R6G) solution, and the obtained blend was dropped onto the PDMS film to form a coffee ring pattern. According to the results, the hydrophobicity of the substrate increases with the degree of PDMS stretching, achieving the optimal level at 150% stretching. Moreover, the increase in hydrophobicity makes the measured molecules more aggregated, which enhances the Raman signal. The stretching and shrinkage of the PDMS film lead to a much higher density of nanogaps among nanoparticles and nanogrooves, which serve as multiple hot spots. Being highly localized regions of intense local fields, these hot spots make a significant contribution to SERS performance, improving the sensitivity and reproducibility of the method. In particular, the relative standard deviation (RSD) was found to be 2.5544%, and the detection limit was 1 × 10-7 M. Therefore, SERS using stretchable and flexible micro-nano substrates is a promising way for detecting dyes in wastewater.
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Yadav S, Senapati S, Kulkarni SS, Singh JP. A SERS based clinical study on HIV-1 viral load quantification and determination of disease prognosis. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2023; 239:112629. [PMID: 36577167 DOI: 10.1016/j.jphotobiol.2022.112629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 11/27/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
In resource limited settings, a cost-effective point-of-care diagnostic testing possessing the characteristics of detecting the minimum viral load of a malady like human immunodeficiency virus (HIV) acquired immune deficiency syndrome (AIDS) is a pressing priority. The present work describes a novel, rapid and field-deployable method using surface enhanced Raman spectroscopy (SERS) for detection and prognosis of HIV positive clinical samples, in seven different viral load ranges varying between 200 and 1 million copies/ml. A relationship between the increasing and decreasing intensity peaks of HIV-1 was also established for quantitation efficacy of the handheld tool. Three different types of SERS substrates: single arm Ag nanorods, double arm Ag nanorods and Au sputtered single arm Ag nanorods were used and the obtained data was compared for the three substrates. It was demonstrated that maximum enhancement was obtained for Au sputtered Ag nanorods. Rigorous coupled wave analysis (RCWA) simulations were performed to study the 'hotspots' in three different SERS substrates. Further, to explore the utility of our platform and to differentiate between the clade specific X4 and R5 tropism, their corresponding SERS spectra were studied using HIV-1 strains belonging to four different HIV-1 subtypes (A, B, C and D) which showed a clear distinction, implying the usefulness of the platform in understanding the disease prognosis. Statistical analysis of the obtained SERS spectra using principal component analysis (PCA) showed good agreement with the experimental results, confirming the ability of SERS platform to quantitate HIV-1 viral load and distinguish HIV-1 strains on the basis of their SERS spectra.
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Affiliation(s)
- Sarjana Yadav
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sneha Senapati
- School of Interdisciplinary Research (SIRe), Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Smita S Kulkarni
- Division of Virology, ICMR-National AIDS Research Institute, Bhosari, Pune 413404, India.
| | - J P Singh
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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Yuan K, Jurado-Sánchez B, Escarpa A. Nanomaterials meet surface-enhanced Raman scattering towards enhanced clinical diagnosis: a review. J Nanobiotechnology 2022; 20:537. [PMID: 36544151 PMCID: PMC9771791 DOI: 10.1186/s12951-022-01711-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 11/15/2022] [Indexed: 12/24/2022] Open
Abstract
Surface-enhanced Raman scattering (SERS) is a very promising tool for the direct detection of biomarkers for the diagnosis of i.e., cancer and pathogens. Yet, current SERS strategies are hampered by non-specific interactions with co-existing substances in the biological matrices and the difficulties of obtaining molecular fingerprint information from the complex vibrational spectrum. Raman signal enhancement is necessary, along with convenient surface modification and machine-based learning to address the former issues. This review aims to describe recent advances and prospects in SERS-based approaches for cancer and pathogens diagnosis. First, direct SERS strategies for key biomarker sensing, including the use of substrates such as plasmonic, semiconductor structures, and 3D order nanostructures for signal enhancement will be discussed. Secondly, we will illustrate recent advances for indirect diagnosis using active nanomaterials, Raman reporters, and specific capture elements as SERS tags. Thirdly, critical challenges for translating the potential of the SERS sensing techniques into clinical applications via machine learning and portable instrumentation will be described. The unique nature and integrated sensing capabilities of SERS provide great promise for early cancer diagnosis or fast pathogens detection, reducing sanitary costs but most importantly allowing disease prevention and decreasing mortality rates.
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Affiliation(s)
- Kaisong Yuan
- Bio-Analytical Laboratory, Shantou University Medical College, No. 22, Xinling Road, Shantou, 515041, China
- Department of Analytical Chemistry, Physical Chemistry, and Chemical Engineering, University of Alcala, Alcala de Henares, 28802, Madrid, Spain
| | - Beatriz Jurado-Sánchez
- Department of Analytical Chemistry, Physical Chemistry, and Chemical Engineering, University of Alcala, Alcala de Henares, 28802, Madrid, Spain
- Chemical Research Institute "Andrés M. del Río", University of Alcala, Alcala de Henares, 28802, Madrid, Spain
| | - Alberto Escarpa
- Department of Analytical Chemistry, Physical Chemistry, and Chemical Engineering, University of Alcala, Alcala de Henares, 28802, Madrid, Spain
- Chemical Research Institute "Andrés M. del Río", University of Alcala, Alcala de Henares, 28802, Madrid, Spain
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Yadav S, Senapati S, Kumar S, Gahlaut SK, Singh JP. GLAD Based Advanced Nanostructures for Diversified Biosensing Applications: Recent Progress. BIOSENSORS 2022; 12:1115. [PMID: 36551082 PMCID: PMC9775079 DOI: 10.3390/bios12121115] [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: 10/27/2022] [Revised: 11/18/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Glancing angle deposition (GLAD) is a technique for the fabrication of sculpted micro- and nanostructures under the conditions of oblique vapor flux incident and limited adatom diffusion. GLAD-based nanostructures are emerging platforms with broad sensing applications due to their high sensitivity, enhanced optical and catalytic properties, periodicity, and controlled morphology. GLAD-fabricated nanochips and substrates for chemical and biosensing applications are replacing conventionally used nanomaterials due to their broad scope, ease of fabrication, controlled growth parameters, and hence, sensing abilities. This review focuses on recent advances in the diverse nanostructures fabricated via GLAD and their applications in the biomedical field. The effects of morphology and deposition conditions on GLAD structures, their biosensing capability, and the use of these nanostructures for various biosensing applications such as surface plasmon resonance (SPR), fluorescence, surface-enhanced Raman spectroscopy (SERS), and colorimetric- and wettability-based bio-detection will be discussed in detail. GLAD has also found diverse applications in the case of molecular imaging techniques such as fluorescence, super-resolution, and photoacoustic imaging. In addition, some in vivo applications, such as drug delivery, have been discussed. Furthermore, we will also provide an overview of the status of GLAD technology as well as future challenges associated with GLAD-based nanostructures in the mentioned areas.
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Affiliation(s)
- Sarjana Yadav
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sneha Senapati
- School of Interdisciplinary Research, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Samir Kumar
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
| | - Shashank K. Gahlaut
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Jitendra P. Singh
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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Gao T, Zhou D, Xu ZK, Wan LS. Rapid Immobilization of Silver Nanoparticles via Amino-quinone Coatings Enables Surface-Enhanced Raman Scattering Detection. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:12207-12216. [PMID: 36184874 DOI: 10.1021/acs.langmuir.2c01836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Immobilization of metal nanoparticles (NPs) on flexible substrates for surface-enhanced Raman scattering (SERS) has received great attention. Anchoring NPs on substrates generally involves the process of surface modification, thanks to its simple, universal, and nondestructive features. 2-Hydroxy-1,4-naphthoquinone (HNQ), a plant-derived compound used to dye hairs and nails, may interact with polyamine or metal ions to form a surface coating. Here, we report the formation of amino-quinone coatings via the co-deposition of HNQ and polyethyleneimine, which provides a functionalized platform to rapidly immobilize Ag NPs on substrates such as a poly(dimethylsiloxane) (PDMS) film to fabricate Ag-PDMS substrates for SERS detection. The detection concentrations are down to 10-8 M for rhodamine 6G. This work expands the system of surface co-deposition and further provides a facile route to prepare a highly efficient SERS substrate.
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Affiliation(s)
- Tian Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, MOE Engineering Research Center of Membrane and Water Treatment Technology, and Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Di Zhou
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, MOE Engineering Research Center of Membrane and Water Treatment Technology, and Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhi-Kang Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, MOE Engineering Research Center of Membrane and Water Treatment Technology, and Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ling-Shu Wan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, MOE Engineering Research Center of Membrane and Water Treatment Technology, and Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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Zhai H, Zhu C, Wang X, Yuan Y, Tang H. Arrays of Ag-nanoparticles decorated TiO2 nanotubes as reusable three-dimensional surface-enhanced Raman scattering substrates for molecule detection. Front Chem 2022; 10:992236. [PMID: 36262347 PMCID: PMC9574249 DOI: 10.3389/fchem.2022.992236] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 09/16/2022] [Indexed: 11/13/2022] Open
Abstract
Three-dimensional surface-enhanced Raman scattering (SERS) substrates usually provide more hot spots in the excitation light beam and higher sensitivity when compared with the two-dimensional counterpart. Here a simple approach is presented for the fabrication of arrays of Ag-nanoparticles decorated TiO2 nanotubes. Arrays of ZnO nanorods were fabricated in advance by a hydrothermal method. Then TiO2 nanotube arrays were achieved by immersing the arrays of ZnO nanorods in an aqueous solution of (NH4)2TiF6 for 1.5 h. Vertically aligned TiO2 nanotube arrays were modified with dense Ag nanoparticles by Ag mirror reaction. High density of Ag nanoparticles decorated on the fabricated TiO2 nanotubes provide plenty of hotspots for Raman enhancement. In addition, the fabricated array of Ag nanoparticles modified TiO2 nanotubes can serve as a reusable SERS substrate because of the photocatalytic activity of the TiO2 nanotubes. The SERS substrate adsorbed with analyte molecules can realize self-cleaning in deionized water after UV irradiation for 2.5 h. The sensitivity of the fabricated SERS substrate was investigated by the detection of organic dye molecules. The detectable concentration limits of rhodamine 6G (R6G), malachite green (MG) and methylene blue (MB) were found to be 10−12 M, 10−9 M and 10−8 M, respectively. The enhancement factor (EF) of the three-dimensional SERS substrate was estimated to be as high as ∼1.4×108. Therefore, the prepared Ag nanoparticles modified TiO2 nanotube arrays have promising potentials to be applied to rapid and trace SERS detection of organic chemicals.
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Affiliation(s)
- Haichao Zhai
- College of Chemistry and Chemical Engineering, School of Materials Science and Engineering, Anhui University, Hefei, China
| | - Chuhong Zhu
- College of Chemistry and Chemical Engineering, School of Materials Science and Engineering, Anhui University, Hefei, China
- *Correspondence: Chuhong Zhu, ; Xiujuan Wang, ; Haibin Tang,
| | - Xiujuan Wang
- School of Microelectronics, Hefei University of Technology, Hefei, China
- *Correspondence: Chuhong Zhu, ; Xiujuan Wang, ; Haibin Tang,
| | - Yupeng Yuan
- College of Chemistry and Chemical Engineering, School of Materials Science and Engineering, Anhui University, Hefei, China
| | - Haibin Tang
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, China
- *Correspondence: Chuhong Zhu, ; Xiujuan Wang, ; Haibin Tang,
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12
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Recent Advances in Silver Nanostructured Substrates for Plasmonic Sensors. BIOSENSORS 2022; 12:bios12090713. [PMID: 36140098 PMCID: PMC9496211 DOI: 10.3390/bios12090713] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/20/2022] [Accepted: 08/22/2022] [Indexed: 11/16/2022]
Abstract
Noble metal nanostructures are known to confine photon energies to their dimensions with resonant oscillations of their conduction electrons, leading to the ultrahigh enhancement of electromagnetic fields in numerous spectroscopic methods. Of all the possible plasmonic nanomaterials, silver offers the most intriguing properties, such as best field enhancements and tunable resonances in visible-to-near infrared regions. This review highlights the recent developments in silver nanostructured substrates for plasmonic sensing with the main emphasis on surface plasmon resonance (SPR) and surface-enhanced Raman spectroscopy (SERS) over the past decade. The main focus is on the synthesis of silver nanostructured substrates via physical vapor deposition and chemical synthesis routes and their applications in each sensing regime. A comprehensive review of recent literature on various possible silver nanostructures prepared through these methodologies is discussed and critically reviewed for various planar and optical fiber-based substrates.
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13
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Nanoporous silver nanorods as surface-enhanced Raman scattering substrates. Biosens Bioelectron 2022; 202:114004. [DOI: 10.1016/j.bios.2022.114004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/10/2022] [Accepted: 01/13/2022] [Indexed: 11/17/2022]
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Li Y, Hu Y, Chen T, Chen Y, Li Y, Zhou H, Yang D. Advanced detection and sensing strategies of Pseudomonas aeruginosa and quorum sensing biomarkers: A review. Talanta 2022; 240:123210. [PMID: 35026633 DOI: 10.1016/j.talanta.2022.123210] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 12/31/2021] [Accepted: 01/04/2022] [Indexed: 11/25/2022]
Abstract
Pseudomonas aeruginosa (P. aeruginosa), a ubiquitous opportunistic pathogen, can frequently cause chronic obstructive pulmonary disease, cystic fibrosis and chronic wounds, and potentially lead to severe morbidity and mortality. Timely and adequate treatment of nosocomial infection in clinic depends on rapid detection and accurate identification of P. aeruginosa and its early-stage antibiotic susceptibility test. Traditional methods like plating culture, polymerase chain reaction, and enzyme-linked immune sorbent assays are time-consuming and require expensive equipment, limiting the rapid diagnostic application. Advanced sensing strategy capable of fast, sensitive and simple detection with low cost has therefore become highly desired in point of care testing (POCT) of nosocomial pathogens. Within this review, advanced detection and sensing strategies for P. aeruginosa cells along with associated quorum sensing (QS) molecules over the last ten years are discussed and summarized. Firstly, the principles of four commonly used sensing strategies including localized surface plasmon resonance (LSPR), surface-enhanced Raman spectroscopy (SERS), electrochemistry, and fluorescence are briefly overviewed. Then, the advancement of the above sensing techniques for P. aeruginosa cells and its QS biomarkers detection are introduced, respectively. In addition, the integration with novel compatible platforms towards clinical application is highlighted in each section. Finally, the current achievements are summarized along with proposed challenges and prospects.
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Affiliation(s)
- Yingying Li
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang Province, 315211, People's Republic of China; Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang Province, 315211, People's Republic of China
| | - Yang Hu
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang Province, 315211, People's Republic of China
| | - Tao Chen
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang Province, 315211, People's Republic of China
| | - Yan Chen
- Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang Province, 315211, People's Republic of China
| | - Yi Li
- Graduate School of Biomedical Engineering and ARC Centre of Excellence in Nanoscale Biophotonics, University of New South Wales, Sydney, 2052, Australia
| | - Haibo Zhou
- College of Pharmacy, Jinan University, Guangzhou, Guangdong, 510632, China
| | - Danting Yang
- The Affiliated Hospital of Medical School, Ningbo University, Ningbo, Zhejiang Province, 315211, People's Republic of China; Department of Preventative Medicine, Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, 818 Fenghua Road, Ningbo, Zhejiang Province, 315211, People's Republic of China.
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Rajpal S, Bhakta S, Mishra P. Biomarker imprinted magnetic core-shell nanoparticles for rapid, culture free detection of pathogenic bacteria. J Mater Chem B 2021; 9:2436-2446. [PMID: 33625438 DOI: 10.1039/d0tb02842h] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Rapid and selective detection of microorganisms in complex biological systems draws huge attention to address the rising issue of antimicrobial resistance. Diagnostics based on the identification of whole microorganisms are laborious, time-consuming and costly, thus alternative strategies for early clinical diagnosis include biomarker based microbial detection. This paper describes a low-cost, easy-to-use method for the detection of Pseudomonas aeruginosa infections by specifically identifying a biomarker pyocyanin, using surface-molecularly imprinted nanoparticles or "plastibodies". The selective nanopockets are created by templating pyocyanin onto 20 nm allyl-functionalized magnetic nanoparticles coated with a thin layer of the acrylamide-based polymer. This functional material with an impressive imprinting factor (IF) of 5 and a binding capacity of ∼2.5 mg g-1 of polymers can be directly applied for the detection of bacteria in complex biological samples based on the presence of pyocyanin. These MIPs are highly selective and sensitive to pyocyanin and can consistently bind with pyocyanin in repeated use. Finally, the facile and efficient capture of pyocyanin has versatile applications ranging from biomarker based culture free detection of P. aeruginosa to monitoring of the therapeutic regime, in addition to developing a new class of antibiotics.
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Affiliation(s)
- Soumya Rajpal
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Snehasis Bhakta
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi 110016, India. and Department of Chemistry, Cooch Behar College, West Bengal 736101, India and Nanoscale Research Facilities, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Prashant Mishra
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi 110016, India.
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Kim HS, Lee T, Yun J, Lee G, Hong Y. Cancer protein biomarker identification and quantification using nanoforest substrate and hand-held Raman spectrometer. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105632] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Zhou X, Hu Z, Yang D, Xie S, Jiang Z, Niessner R, Haisch C, Zhou H, Sun P. Bacteria Detection: From Powerful SERS to Its Advanced Compatible Techniques. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001739. [PMID: 33304748 PMCID: PMC7710000 DOI: 10.1002/advs.202001739] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/24/2020] [Indexed: 05/13/2023]
Abstract
The rapid, highly sensitive, and accurate detection of bacteria is the focus of various fields, especially food safety and public health. Surface-enhanced Raman spectroscopy (SERS), with the advantages of being fast, sensitive, and nondestructive, can be used to directly obtain molecular fingerprint information, as well as for the on-line qualitative analysis of multicomponent samples. It has therefore become an effective technique for bacterial detection. Within this progress report, advances in the detection of bacteria using SERS and other compatible techniques are discussed in order to summarize its development in recent years. First, the enhancement principle and mechanism of SERS technology are briefly overviewed. The second part is devoted to a label-free strategy for the detection of bacterial cells and bacterial metabolites. In this section, important considerations that must be made to improve bacterial SERS signals are discussed. Then, the label-based SERS strategy involves the design strategy of SERS tags, the immunomagnetic separation of SERS tags, and the capture of bacteria from solution and dye-labeled SERS primers. In the third part, several novel SERS compatible technologies and applications in clinical and food safety are introduced. In the final part, the results achieved are summarized and future perspectives are proposed.
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Affiliation(s)
- Xia Zhou
- College of PharmacyJinan UniversityGuangzhouGuangdong510632China
- Department of Oncologythe First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong510632China
| | - Ziwei Hu
- College of PharmacyJinan UniversityGuangzhouGuangdong510632China
| | - Danting Yang
- Department of Preventative Medicine, Zhejiang Provincial Key Laboratory of Pathological and Physiological TechnologyMedical School of Ningbo UniversityNingboZhejiang315211China
| | - Shouxia Xie
- The Second Clinical Medical College (Shenzhen People's Hospital)Jinan UniversityShenzhenGuangdong518020China
| | - Zhengjin Jiang
- College of PharmacyJinan UniversityGuangzhouGuangdong510632China
| | - Reinhard Niessner
- Institute of Hydrochemistry and Chair for Analytical ChemistryTechnical University of MunichMarchioninistr. 17MunichD‐81377Germany
| | - Christoph Haisch
- Institute of Hydrochemistry and Chair for Analytical ChemistryTechnical University of MunichMarchioninistr. 17MunichD‐81377Germany
| | - Haibo Zhou
- College of PharmacyJinan UniversityGuangzhouGuangdong510632China
- Department of Oncologythe First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong510632China
- The Second Clinical Medical College (Shenzhen People's Hospital)Jinan UniversityShenzhenGuangdong518020China
| | - Pinghua Sun
- College of PharmacyJinan UniversityGuangzhouGuangdong510632China
- Department of Oncologythe First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong510632China
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18
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Yadav S, Senapati S, Desai D, Gahlaut S, Kulkarni S, Singh JP. Portable and sensitive Ag nanorods based SERS platform for rapid HIV-1 detection and tropism determination. Colloids Surf B Biointerfaces 2020; 198:111477. [PMID: 33280974 DOI: 10.1016/j.colsurfb.2020.111477] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 11/12/2020] [Accepted: 11/16/2020] [Indexed: 12/11/2022]
Abstract
In this study, surface-enhanced Raman scattering (SERS) based field-deployable platform has been explored for early detection and distinction of the human immunodeficiency virus (HIV-1). A highly optimized silver nanorods array, fabricated using glancing angle deposition technique was used as SERS substrate. Distinct signature peaks for varying concentrations (102 to 106 copies/mL) were identified in five different HIV-1 subtypes (A, B, C, D, and CRF02_AG). Binding of viruses directly with Ag nanorods without using antibodies or intermediate reagents is shown. The purified viruses were spiked in water and healthy plasma to capture pure HIV-1 peaks. Distinct peaks were also captured for the X4 and R5 tropic strains suggesting tropism based detection. The above data was further confirmed and analyzed statistically using a multivariate tool. Thus, the present study indicates the ability of the SERS platform to detect and differentiate the HIV-1 virus implying its further validation using clinical specimens and isolates.
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Affiliation(s)
- Sarjana Yadav
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sneha Senapati
- Virology Division, ICMR-National AIDS Research Institute, Bhosari, Pune, India
| | - Dipen Desai
- Virology Division, ICMR-National AIDS Research Institute, Bhosari, Pune, India
| | - Shashank Gahlaut
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Smita Kulkarni
- Virology Division, ICMR-National AIDS Research Institute, Bhosari, Pune, India.
| | - J P Singh
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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Kumar S, Kanagawa M, Namura K, Fukuoka T, Suzuki M. Multilayer thin-film flake dispersion gel for surface-enhanced Raman spectroscopy. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01562-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Alafeef M, Moitra P, Pan D. Nano-enabled sensing approaches for pathogenic bacterial detection. Biosens Bioelectron 2020; 165:112276. [PMID: 32729465 DOI: 10.1016/j.bios.2020.112276] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/30/2020] [Accepted: 05/04/2020] [Indexed: 01/16/2023]
Abstract
Infectious diseases caused by pathogenic bacteria, especially antibiotic-resistant bacteria, are one of the biggest threats to global health. To date, bacterial contamination is detected using conventional culturing techniques, which are highly dependent on expert users, limited by the processing time and on-site availability. Hence, real-time and continuous monitoring of pathogen levels is required to obtain valuable information that could assist health agencies in guiding prevention and containment of pathogen-related outbreaks. Nanotechnology-based smart sensors are opening new avenues for early and rapid detection of such pathogens at the patient's point-of-care. Nanomaterials can play an essential role in bacterial sensing owing to their unique optical, magnetic, and electrical properties. Carbon nanoparticles, metallic nanoparticles, metal oxide nanoparticles, and various types of nanocomposites are examples of smart nanomaterials that have drawn intense attention in the field of microbial detection. These approaches, together with the advent of modern technologies and coupled with machine learning and wireless communication, represent the future trend in the diagnosis of infectious diseases. This review provides an overview of the recent advancements in the successful harnessing of different nanoparticles for bacterial detection. In the beginning, we have introduced the fundamental concepts and mechanisms behind the design and strategies of the nanoparticles-based diagnostic platform. Representative research efforts are highlighted for in vitro and in vivo detection of bacteria. A comprehensive discussion is then presented to cover the most commonly adopted techniques for bacterial identification, including some seminal studies to detect bacteria at the single-cell level. Finally, we discuss the current challenges and a prospective outlook on the field, together with the recommended solutions.
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Affiliation(s)
- Maha Alafeef
- Bioengineering Department, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States; Biomedical Engineering Department, Jordan University of Science and Technology, Irbid, 22110, Jordan; Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland Baltimore School of Medicine, 670 W Baltimore St., Baltimore, MD, 21201, United States
| | - Parikshit Moitra
- Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland Baltimore School of Medicine, 670 W Baltimore St., Baltimore, MD, 21201, United States; Department of Pediatrics, University of Maryland Baltimore School of Medicine, 670 W Baltimore St., Baltimore, MD, 21201, United States
| | - Dipanjan Pan
- Bioengineering Department, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States; Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland Baltimore School of Medicine, 670 W Baltimore St., Baltimore, MD, 21201, United States; Department of Pediatrics, University of Maryland Baltimore School of Medicine, 670 W Baltimore St., Baltimore, MD, 21201, United States; Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, 1000 Hiltop Circle, Baltimore, MD, 21250, United States.
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21
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Kumar S, Doi Y, Namura K, Suzuki M. Plasmonic Nanoslit Arrays Fabricated by Serial Bideposition: Optical and Surface-Enhanced Raman Scattering Study. ACS APPLIED BIO MATERIALS 2020; 3:3226-3235. [DOI: 10.1021/acsabm.0c00215] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Samir Kumar
- Department of Micro Engineering, Graduate School of Engineering, Kyoto University, Nishikyo, Kyoto 615-8540, Japan
| | - Yusuke Doi
- Department of Micro Engineering, Graduate School of Engineering, Kyoto University, Nishikyo, Kyoto 615-8540, Japan
| | - Kyoko Namura
- Department of Micro Engineering, Graduate School of Engineering, Kyoto University, Nishikyo, Kyoto 615-8540, Japan
| | - Motofumi Suzuki
- Department of Micro Engineering, Graduate School of Engineering, Kyoto University, Nishikyo, Kyoto 615-8540, Japan
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22
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3D Ultrasensitive Polymers-Plasmonic Hybrid Flexible Platform for In-Situ Detection. Polymers (Basel) 2020; 12:polym12020392. [PMID: 32050477 PMCID: PMC7077657 DOI: 10.3390/polym12020392] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 01/29/2020] [Accepted: 01/30/2020] [Indexed: 12/26/2022] Open
Abstract
This paper introduces a three-dimensional (3D) pyramid to the polymers-plasmonic hybrid structure of polymethyl methacrylate (PMMA) composite silver nanoparticle (AgNPs) as a higher quality flexible surface-enhanced Raman scattering (SERS) substrate. Benefiting from the effective oscillation of light inside the pyramid valley could provide wide distributions of 3D “hot spots” in a large space. The inclined surface design of the pyramid structure could facilitate the aggregation of probe molecules, which achieves highly sensitive detection of rhodamine 6G (R6G) and crystal violet (CV). In addition, the AgNPs and PMMA composite structures provide uniform space distribution for analyte detection in a designated hot spot zone. The incident light can penetrate the external PMMA film to trigger the localized plasmon resonance of the encapsulated AgNPs, achieving enormous enhancement factor (~6.24×108). After undergoes mechanical deformation, the flexible SERS substrate still maintains high mechanical stability, which was proved by experiment and theory. For practical applications, the prepared flexible SERS substrate is adapted to the in-situ Raman detection of adenosine aqueous solution and the methylene-blue (MB) molecule detection of the skin of a fish, providing a direct and nondestructive active-platform for the detecting on the surfaces with any arbitrary morphology and aqueous solution.
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23
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Zhang J, Wang C, Wang M, Xu T. In situ synthesis of silver nanoparticles on periodic supports as highly active and flexible surface-enhanced Raman spectroscopy substrates. APPLIED OPTICS 2020; 59:662-668. [PMID: 32225192 DOI: 10.1364/ao.378734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 12/04/2019] [Indexed: 06/10/2023]
Abstract
With regard to surface-enhanced Raman spectroscopy (SERS), the preparation of substrates with high homogeneity and low cost remains a challenge. In this paper, cheap commercial DVD-R plates were adopted as supports, whose 3D periodic structure was transferred onto the surface of flexible polydimethylsiloxane (PDMS) easily. Then, silver nanoparticles were grown both on DVD and PDMS substrates by the in situ reduction method, and the SERS performances of these two substrates were investigated. The results confirmed that the PDMS-based substrate exhibited better enhancement performance and higher uniformity (RSD=4.16%). In addition, due to the flexibility and transparency of PDMS, it is not restricted by the surface shape of the object when applied in in situ detection. This low-cost, simple method will be widely used in the in situ detection of surfaces of objects of any shape.
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Gahlaut SK, Savargaonkar D, Sharan C, Yadav S, Mishra P, Singh JP. SERS Platform for Dengue Diagnosis from Clinical Samples Employing a Hand Held Raman Spectrometer. Anal Chem 2020; 92:2527-2534. [PMID: 31909593 DOI: 10.1021/acs.analchem.9b04129] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Dengue is a serious global health concern especially in tropical and subtropical countries. About 2.5 billion of the world's population is at risk for dengue infection. Early diagnosis is the key to prevent the deterioration of health of the patient to severe illness. Laboratory diagnosis of dengue is essential for providing appropriate supportive treatment to dengue patients with febrile illness, which is difficult to diagnose clinically. Here, we demonstrate surface enhanced Raman scattering (SERS) based diagnosis of dengue virus in clinical blood samples collected from total of 102 subjects. All of the samples were well characterized by conventional NS1 antigen and IgM antibody ELISA kits. The silver nanorods array fabricated by glancing angle deposition technique were employed as SERS substrates. A small amount of patient blood serum (5 μL) was taken for analysis and the report was prepared within a minute. SERS spectra of pure NS1 protein as well as spiked in serum was also recorded separately. Principal component analysis (PCA) was employed as the statistical tool to differentiate dengue positive, dengue negative, and healthy subjects on the basis of their respective SERS spectra. This method provides a sensitive, rapid, and field deployable diagnosis of dengue at the early stage (within 5 days of the onset of symptoms).
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Affiliation(s)
- S K Gahlaut
- Department of Physics , Indian Institute of Technology Delhi , Hauz Khas , New Delhi 110016 , India
| | - D Savargaonkar
- ICMR-National Institute of Malaria Research , Dwarka , New Delhi 110077 , India
| | - C Sharan
- Department of Physics , Indian Institute of Technology Delhi , Hauz Khas , New Delhi 110016 , India
| | - Sarjana Yadav
- Department of Physics , Indian Institute of Technology Delhi , Hauz Khas , New Delhi 110016 , India
| | - P Mishra
- Department of Biochemical Engineering and Biotechnology , Indian Institute of Technology Delhi , Hauz Khas , New Delhi 110016 , India
| | - J P Singh
- Department of Physics , Indian Institute of Technology Delhi , Hauz Khas , New Delhi 110016 , India
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25
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Li B, Wang T, Su Q, Wu X, Dong P. Fabrication of Au Nanorods by the Oblique Angle Deposition Process for Trace Detection of Methamphetamine with Surface-Enhanced Raman Scattering. SENSORS 2019; 19:s19173742. [PMID: 31470612 PMCID: PMC6749386 DOI: 10.3390/s19173742] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/14/2019] [Accepted: 08/20/2019] [Indexed: 01/12/2023]
Abstract
Oblique angle deposition (OAD) is a simple, low cost, effective, and maskless nanofabrication process. It can offer a reliable method for the mass fabrication of uniform metal nanorods which can be used as the surface-enhanced Raman scattering (SERS) substrate with an excellent enhancing performance. Up to now, Ag nanorods SERS substrates have been extensively studied. However, Ag is chemically active and easy to oxidize under atmospheric conditions. Comparatively, Au is chemically stable and has better biocompatibility than Ag. In this paper, we in detail, studied the electromechanical (EM) field distribution simulation, fabrication, and application of Au nanorods (AuNRs) on trace detection of methamphetamine. According to the finite-difference time-domain (FDTD) calculation results, the maximum EM intensity can be obtained with the length of AuNRs to be 800 nm and the tilting angle of AuNRs to be 71° respectively. The aligned Au nanorod array substrate was fabricated by the OAD process. The two key process parameters, deposition angle, and deposition rate were optimized by experiments, which were 86° and 2 Å/s, respectively. Using 1,2-bis (4-pyridyl) ethylene (BPE) as the probe molecule, the limit of detection (LOD) was characterized to be 10−11 M. The AuNRs were also used to detect methamphetamine. The LOD can be down to M (i.e., 14.92 pg/ml), which meet the requirements of the on-site rapid detection of the methamphetamine in human urine (500 ng/ml).
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Affiliation(s)
- Baini Li
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China
| | - Tianran Wang
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China
| | - Qingqing Su
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China
| | - Xuezhong Wu
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China
| | - Peitao Dong
- College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China.
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Xu K, Zhou R, Takei K, Hong M. Toward Flexible Surface-Enhanced Raman Scattering (SERS) Sensors for Point-of-Care Diagnostics. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900925. [PMID: 31453071 PMCID: PMC6702763 DOI: 10.1002/advs.201900925] [Citation(s) in RCA: 236] [Impact Index Per Article: 47.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 05/26/2019] [Indexed: 05/18/2023]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy provides a noninvasive and highly sensitive route for fingerprint and label-free detection of a wide range of molecules. Recently, flexible SERS has attracted increasingly tremendous research interest due to its unique advantages compared to rigid substrate-based SERS. Here, the latest advances in flexible substrate-based SERS diagnostic devices are investigated in-depth. First, the intriguing prospect of point-of-care diagnostics is briefly described, followed by an introduction to the cutting-edge SERS technique. Then, the focus is moved from conventional rigid substrate-based SERS to the emerging flexible SERS technique. The main part of this report highlights the recent three categories of flexible SERS substrates, including actively tunable SERS, swab-sampling strategy, and the in situ SERS detection approach. Furthermore, other promising means of flexible SERS are also introduced. The flexible SERS substrates with low-cost, batch-fabrication, and easy-to-operate characteristics can be integrated into portable Raman spectroscopes for point-of-care diagnostics, which are conceivable to penetrate global markets and households as next-generation wearable sensors in the near future.
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Affiliation(s)
- Kaichen Xu
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117576Singapore
- Department of Physics and ElectronicsOsaka Prefecture University SakaiOsaka599‐8531Japan
| | - Rui Zhou
- School of Aerospace EngineeringXiamen University422 Siming South Road, Siming DistrictXiamenFujian361005P. R. China
| | - Kuniharu Takei
- Department of Physics and ElectronicsOsaka Prefecture University SakaiOsaka599‐8531Japan
| | - Minghui Hong
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3Singapore117576Singapore
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Singh S, Moudgil A, Mishra N, Das S, Mishra P. Vancomycin functionalized WO3 thin film-based impedance sensor for efficient capture and highly selective detection of Gram-positive bacteria. Biosens Bioelectron 2019; 136:23-30. [DOI: 10.1016/j.bios.2019.04.029] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/05/2019] [Accepted: 04/15/2019] [Indexed: 01/08/2023]
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28
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Sai-Anand G, Sivanesan A, Benzigar MR, Singh G, Gopalan AI, Baskar AV, Ilbeygi H, Ramadass K, Kambala V, Vinu A. Recent Progress on the Sensing of Pathogenic Bacteria Using Advanced Nanostructures. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20180280] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Gopalan Sai-Anand
- Global Innovative Center for Advanced Nanomaterials, Faculty of Built Environment and Engineering, The University of Newcastle, Callaghan 2308, New South Wales, Australia
- Future Industries Institute, Division of Information Technology, Engineering and Environment, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Arumugam Sivanesan
- Future Industries Institute, Division of Information Technology, Engineering and Environment, University of South Australia, Mawson Lakes, South Australia 5095, Australia
- Metrohm Australia, 56 Buffalo Road, Gladesville, NSW 2111, Australia
| | - Mercy R Benzigar
- Future Industries Institute, Division of Information Technology, Engineering and Environment, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Gurwinder Singh
- Global Innovative Center for Advanced Nanomaterials, Faculty of Built Environment and Engineering, The University of Newcastle, Callaghan 2308, New South Wales, Australia
- Future Industries Institute, Division of Information Technology, Engineering and Environment, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Anantha-Iyengar Gopalan
- Research Institute of Advanced Energy Technology, Kyungpook National University, Daegu 41566, Korea
| | - Arun Vijay Baskar
- Global Innovative Center for Advanced Nanomaterials, Faculty of Built Environment and Engineering, The University of Newcastle, Callaghan 2308, New South Wales, Australia
- Future Industries Institute, Division of Information Technology, Engineering and Environment, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Hamid Ilbeygi
- Future Industries Institute, Division of Information Technology, Engineering and Environment, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Kavitha Ramadass
- Global Innovative Center for Advanced Nanomaterials, Faculty of Built Environment and Engineering, The University of Newcastle, Callaghan 2308, New South Wales, Australia
- Future Industries Institute, Division of Information Technology, Engineering and Environment, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Venkata Kambala
- Hudson Marketing Pty Ltd, Level 2/131 Macquarie St, Sydney NSW 2000, Australia
| | - Ajayan Vinu
- Global Innovative Center for Advanced Nanomaterials, Faculty of Built Environment and Engineering, The University of Newcastle, Callaghan 2308, New South Wales, Australia
- Future Industries Institute, Division of Information Technology, Engineering and Environment, University of South Australia, Mawson Lakes, South Australia 5095, Australia
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Application of SERS-Based Microfluidics for In Vitro Diagnostics. Bioanalysis 2019. [DOI: 10.1007/978-981-13-6229-3_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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30
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Chatterjee B, Kalyani N, Das S, Anand A, Sharma TK. Nano-realm for point-of-care (POC) bacterial diagnostics. J Microbiol Methods 2019. [DOI: 10.1016/bs.mim.2019.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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31
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Wang C, Wong KW, Wang Q, Zhou Y, Tang C, Fan M, Mei J, Lau WM. Silver-nanoparticles-loaded chitosan foam as a flexible SERS substrate for active collecting analytes from both solid surface and solution. Talanta 2019; 191:241-247. [DOI: 10.1016/j.talanta.2018.08.067] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 08/14/2018] [Accepted: 08/27/2018] [Indexed: 10/28/2022]
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32
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Whang K, Lee JH, Shin Y, Lee W, Kim YW, Kim D, Lee LP, Kang T. Plasmonic bacteria on a nanoporous mirror via hydrodynamic trapping for rapid identification of waterborne pathogens. LIGHT, SCIENCE & APPLICATIONS 2018; 7:68. [PMID: 30302239 PMCID: PMC6168555 DOI: 10.1038/s41377-018-0071-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 08/24/2018] [Accepted: 09/09/2018] [Indexed: 05/24/2023]
Abstract
A rapid, precise method for identifying waterborne pathogens is critically needed for effective disinfection and better treatment. However, conventional methods, such as culture-based counting, generally suffer from slow detection times and low sensitivities. Here, we developed a rapid detection method for tracing waterborne pathogens by an innovative optofluidic platform, a plasmonic bacteria on a nanoporous mirror, that allows effective hydrodynamic cell trapping, enrichment of pathogens, and optical signal amplifications. We designed and simulated the integrated optofluidic platform to maximize the enrichment of the bacteria and to align bacteria on the nanopores and plasmonic mirror via hydrodynamic cell trapping. Gold nanoparticles are self-assembled to form antenna arrays on the surface of bacteria, such as Escherichia coli and Pseudomonas aeruginosa, by replacing citrate with hydroxylamine hydrochloride in order to amplify the signal of the plasmonic optical array. Owing to the synergistic contributions of focused light via the nanopore geometry, self-assembled nanoplasmonic optical antennas on the surface of bacteria, and plasmonic mirror, we obtain a sensitivity of detecting E. coli as low as 102 cells/ml via surface-enhanced Raman spectroscopy. We believe that our label-free strategy via an integrated optofluidic platform will pave the way for the rapid, precise identification of various pathogens.
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Affiliation(s)
- Keumrai Whang
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107 Korea
| | - Jong-Hwan Lee
- Berkeley Sensor and Actuator Center, Departments of Bioengineering, Electrical Engineering and Computer Science, Biophysics Graduate Program, University of California, Berkeley, Berkeley, CA 94720 USA
| | - Yonghee Shin
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107 Korea
| | - Wooju Lee
- Department of Mechanical Engineering, Sogang University, Seoul, 04107 Korea
| | - Young Wan Kim
- Department of Mechanical Engineering, Sogang University, Seoul, 04107 Korea
| | - Dongchoul Kim
- Department of Mechanical Engineering, Sogang University, Seoul, 04107 Korea
| | - Luke P. Lee
- Berkeley Sensor and Actuator Center, Departments of Bioengineering, Electrical Engineering and Computer Science, Biophysics Graduate Program, University of California, Berkeley, Berkeley, CA 94720 USA
| | - Taewook Kang
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107 Korea
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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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34
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Cultivation-Free Raman Spectroscopic Investigations of Bacteria. Trends Microbiol 2017; 25:413-424. [DOI: 10.1016/j.tim.2017.01.002] [Citation(s) in RCA: 132] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 01/06/2017] [Accepted: 01/11/2017] [Indexed: 01/22/2023]
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35
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Rajput A, Kumar S, Singh JP. Vertically standing nanoporous Al–Ag zig-zag silver nanorod arrays for highly active SERS substrates. Analyst 2017; 142:3959-3966. [DOI: 10.1039/c7an00851a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We have demonstrated a simple de-alloying method to create nanogaps in a vertically standing zigzag AgNR arrays which act as SERS active hot spots for better SERS sensitivity.
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Affiliation(s)
- Ankita Rajput
- Department of Physics
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Samir Kumar
- Department of Physics
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Jitendra P. Singh
- Department of Physics
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
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36
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Wang R, Chon H, Lee S, Cheng Z, Hong SH, Yoon YH, Choo J. Highly Sensitive Detection of Hormone Estradiol E2 Using Surface-Enhanced Raman Scattering Based Immunoassays for the Clinical Diagnosis of Precocious Puberty. ACS APPLIED MATERIALS & INTERFACES 2016; 8:10665-10672. [PMID: 27070977 DOI: 10.1021/acsami.5b10996] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The hormone estradiol (17β-estradiol, E2) plays an important role in sexual development and serves as an important diagnostic biomarker of various clinical conditions. Particularly, the serum E2 concentration is very low (<10 pg/mL) in prepubertal girls. Accordingly, many efforts to develop a sensitive method of detection and quantification of E2 in human serum have been made. Nonetheless, current clinical detection methods are insufficient for accurate assessment of E2 at low concentrations (<10 pg/mL). Thus, there is an urgent need for new technologies with efficient and sensitive detection of E2 for use in routine clinical diagnostics. In this study, we introduce a new E2 assay technique using a surface-enhanced Raman scattering (SERS)-based detection method. The SERS-based assay was performed with 30 blood samples to assess its clinical feasibility, and the results were compared with data obtained using the ARCHITECT chemiluminescence immunoassay. Whereas the commercial assay system was unable to quantify serum levels of E2 lower than 10 pg/mL, the limit of detection of E2 using the novel SERS-based assay described in this study was 0.65 pg/mL. Thus, the proposed SERS-based assay has a strong potential to be a valuable tool in the early diagnosis of precocious puberty due to its excellent analytical sensitivity.
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Affiliation(s)
- Rui Wang
- Department of Bionano Technology, Hanayng University , Ansan 426-791, South Korea
| | - Hyangah Chon
- Department of Bionano Technology, Hanayng University , Ansan 426-791, South Korea
| | - Sangyeop Lee
- Department of Bionano Technology, Hanayng University , Ansan 426-791, South Korea
| | - Ziyi Cheng
- Department of Bionano Technology, Hanayng University , Ansan 426-791, South Korea
| | | | | | - Jaebum Choo
- Department of Bionano Technology, Hanayng University , Ansan 426-791, South Korea
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37
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Kumar S, Lodhi DK, Singh JP. Highly sensitive multifunctional recyclable Ag–TiO2 nanorod SERS substrates for photocatalytic degradation and detection of dye molecules. RSC Adv 2016. [DOI: 10.1039/c6ra06163j] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report a facile method to fabricate novel and recyclable Ag nanoparticle decorated TiO2 nanorod array substrates using a glancing angle deposition (GLAD) technique for photocatalysis and surface enhanced Raman scattering (SERS) applications.
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Affiliation(s)
- Samir Kumar
- Department of Physics
- Indian Institute of Technology Delhi
- India
| | - Devesh K. Lodhi
- Department of Physics
- Indian Institute of Technology Delhi
- India
| | - J. P. Singh
- Department of Physics
- Indian Institute of Technology Delhi
- India
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38
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Li J, Dong S, Tong J, Zhu P, Diao G, Yang Z. 3D ordered silver nanoshells silica photonic crystal beads for multiplex encoded SERS bioassay. Chem Commun (Camb) 2016; 52:284-7. [DOI: 10.1039/c5cc08332j] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
3D ordered silver nanoshell silica photonic crystal beads as a novel encoded surface enhanced Raman scattering substrate are proposed for the development of highly efficient multiplex bioassays.
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Affiliation(s)
- Juan Li
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- P. R. China
| | - Shujun Dong
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- P. R. China
| | - Jingjing Tong
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- P. R. China
| | - Peizhi Zhu
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- P. R. China
| | - Guowang Diao
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- P. R. China
| | - Zhanjun Yang
- College of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou 225002
- P. R. China
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39
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Lin X, Hasi WLJ, Han SQGW, Lou XT, Lin DY, Lu ZW. Fabrication of transparent SERS platform via interface self-assembly of gold nanorods and gel trapping technique for on-site real time detection. Phys Chem Chem Phys 2015; 17:31324-31. [DOI: 10.1039/c5cp04828a] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Au nanorod PDMS SERS platform has been developed for the on-site detection of contaminants in water and on real-world surfaces.
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Affiliation(s)
- Xiang Lin
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
| | - Wu-Li-Ji Hasi
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
| | - Si-Qin-Gao-Wa Han
- Affiliated Hospital of Inner Mongolia University for the Nationalities
- Tongliao
- China
| | - Xiu-Tao Lou
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
| | - Dian-Yang Lin
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
| | - Zhi-Wei Lu
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
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