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Stokes K, Clark K, Odetade D, Hardy M, Goldberg Oppenheimer P. Advances in lithographic techniques for precision nanostructure fabrication in biomedical applications. DISCOVER NANO 2023; 18:153. [PMID: 38082047 PMCID: PMC10713959 DOI: 10.1186/s11671-023-03938-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 12/04/2023] [Indexed: 01/31/2024]
Abstract
Nano-fabrication techniques have demonstrated their vital importance in technological innovation. However, low-throughput, high-cost and intrinsic resolution limits pose significant restrictions, it is, therefore, paramount to continue improving existing methods as well as developing new techniques to overcome these challenges. This is particularly applicable within the area of biomedical research, which focuses on sensing, increasingly at the point-of-care, as a way to improve patient outcomes. Within this context, this review focuses on the latest advances in the main emerging patterning methods including the two-photon, stereo, electrohydrodynamic, near-field electrospinning-assisted, magneto, magnetorheological drawing, nanoimprint, capillary force, nanosphere, edge, nano transfer printing and block copolymer lithographic technologies for micro- and nanofabrication. Emerging methods enabling structural and chemical nano fabrication are categorised along with prospective chemical and physical patterning techniques. Established lithographic techniques are briefly outlined and the novel lithographic technologies are compared to these, summarising the specific advantages and shortfalls alongside the current lateral resolution limits and the amenability to mass production, evaluated in terms of process scalability and cost. Particular attention is drawn to the potential breakthrough application areas, predominantly within biomedical studies, laying the platform for the tangible paths towards the adoption of alternative developing lithographic technologies or their combination with the established patterning techniques, which depends on the needs of the end-user including, for instance, tolerance of inherent limits, fidelity and reproducibility.
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Affiliation(s)
- Kate Stokes
- Advanced Nanomaterials Structures and Applications Laboratories, School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Kieran Clark
- Advanced Nanomaterials Structures and Applications Laboratories, School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - David Odetade
- Advanced Nanomaterials Structures and Applications Laboratories, School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Mike Hardy
- School of Biological Sciences, Institute for Global Food Security, Queen's University Belfast, Belfast, BT9 5DL, UK
- Centre for Quantum Materials and Technology, School of Mathematics and Physics, Queen's University Belfast, Belfast, BT7 1NN, UK
| | - Pola Goldberg Oppenheimer
- Advanced Nanomaterials Structures and Applications Laboratories, School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
- Healthcare Technologies Institute, Institute of Translational Medicine, Mindelsohn Way, Birmingham, B15 2TH, UK.
- Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
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Gong T, Li H, Wang G, Guan F, Huang W, Zhang X. An anti-scratch flexible SERS substrate for pesticide residue detection on the surface of fruits and vegetables. NANOTECHNOLOGY 2022; 33:405501. [PMID: 35767929 DOI: 10.1088/1361-6528/ac7cf3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
We propose an anti-scratch flexible surface-enhanced Raman scattering substrate with arrayed nanocavity microstructures fabricated by colloidal lithography. The nanocavity microstructure of the substrate can well protect the inner gold nanoparticles during wipe sampling. The prepared flexible substrate was able to detect 4-aminothiophenol (4-ATP) with a concentration down to 1 fM. Furthermore, the substrate was used to detect 6-BA residues on the surface of apples and bean sprouts through wipe sampling, which shows great potential in the field of rapid on-site detection, especially in the detection of pesticide residues on the surface of fruits and vegetables.
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Affiliation(s)
- Tianxun Gong
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Haonan Li
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Guilin Wang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Fang Guan
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Wen Huang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Xiaosheng Zhang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, People's Republic of China
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Abstract
Current advances in the fabrication of smart nanomaterials and nanostructured surfaces find wide usage in the biomedical field. In this context, nanosensors based on localized surface plasmon resonance exhibit unprecedented optical features that can be exploited to reduce the costs, analytic times, and need for expensive lab equipment. Moreover, they are promising for the design of nanoplatforms with multiple functionalities (e.g., multiplexed detection) with large integration within microelectronics and microfluidics. In this review, we summarize the most recent design strategies, fabrication approaches, and bio-applications of plasmonic nanoparticles (NPs) arranged in colloids, nanoarrays, and nanocomposites. After a brief introduction on the physical principles behind plasmonic nanostructures both as inherent optical detection and as nanoantennas for external signal amplification, we classify the proposed examples in colloid-based devices when plasmonic NPs operate in solution, nanoarrays when they are assembled or fabricated on rigid substrates, and nanocomposites when they are assembled within flexible/polymeric substrates. We highlight the main biomedical applications of the proposed devices and offer a general overview of the main strengths and limitations of the currently available plasmonic nanodevices.
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4
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Biogenic preparation of biphasic calcium phosphate powder from natural source of snail shells: bioactivity study. SN APPLIED SCIENCES 2022. [DOI: 10.1007/s42452-022-05025-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
AbstractIn this present work, carbonated apatite powder (CAP) and β-tricalcium phosphate (β-TCP) were prepared from waste snail shells via thermal decomposition followed by chemical precipitation method with phosphoric acid in a one step process. The CAP produced was thereafter reacted with a pore forming agent solution of ammonium bicarbonate to formed carbonated apatite powder- ammonium bicarbonate scaffold composites (CAP-AMB) and was deployed in a bioactivity experiment with simulated body fluid (SBF) media. The phase purity, crystallinity, particle size, thermal behaviour, elemental composition, morphology as well as the functional groups of snail shells, synthesized CAP and CAP-AMB scaffold were assessed by XRD, FE-SEM, TGA, EDX, TEM and FT-IR. XRD and selected area electron diffraction (SAED) results confirmed the synthesized apatite as pure amorphous powder which upon heat treatment, transformed to polycrystalline powder. Analysis of FT-IR results revealed that the apatite produced from snail shells (SS) contains phosphates and hydroxyl functional groups. Furthermore, the formation of carbonated apatite was also confirmed from the FT-IR result with peaks which appeared at 882 and 1484 cm−1 respectively, thus depicting a B-type apatite. Microscopy analyses by FE-SEM and TEM indicated that the prepared apatite is composed of different morphologies in the range of 5 to 200 nm long. The presence of trace elements such as K, C, Na, Mg and Mg which could play crucial functions in biological applications were detected by EDX measurement alongside Ca and P. The mixture of CAP with AMB produced interconnected pores structure with porosity in the range of 35–67%. The bioactivity study of the SBF treated CAP-AMB composite confirmed apatite formation on the scaffold surface which totally covered the pores after seven days of incubation. Thus, waste biomaterial of snail shells origin can be use for the production of pure apatite that could be useful in medical application.
Graphical abstract
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Suresh V, Chew AB, Tan CYL, Tan HR. Block copolymer self-assembly assisted fabrication of laterally organized- and stacked- nanoarrays. NANOTECHNOLOGY 2022; 33:135303. [PMID: 34929677 DOI: 10.1088/1361-6528/ac44ea] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Block copolymer (BCP) self-assembly processes are often seen as reliable techniques for advanced nanopatterning to achieve functional surfaces and create templates for nanofabrication. By taking advantage of the tunability in pitch, diameter and feature-to-feature separation of the self-assembled BCP features, complex, laterally organized- and stacked- multicomponent nanoarrays comprising of gold and polymer have been fabricated. The approaches not only demonstrate nanopatterning of up to two levels of hierarchy but also investigate how a variation in the feature-to-feature gap at the first hierarchy affects the self-assembly of polymer features at the second. Such BCP self-assembly enabled multicomponent nanoarray configurations are rarely achieved by other nanofabrication approaches and are particularly promising for pushing the boundaries of block copolymer lithography and in creating unique surface architectures and complex morphologies at the nanoscale.
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Affiliation(s)
- Vignesh Suresh
- Agency for Science Technology and Research (A*STAR)-Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03, Innovis 138634, Singapore
| | - Ah Bian Chew
- Agency for Science Technology and Research (A*STAR)-Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03, Innovis 138634, Singapore
| | - Christina Yuan Ling Tan
- Agency for Science Technology and Research (A*STAR)-Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03, Innovis 138634, Singapore
| | - Hui Ru Tan
- Agency for Science Technology and Research (A*STAR)-Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03, Innovis 138634, Singapore
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López-Lorente ÁI. Recent developments on gold nanostructures for surface enhanced Raman spectroscopy: Particle shape, substrates and analytical applications. A review. Anal Chim Acta 2021; 1168:338474. [PMID: 34051992 DOI: 10.1016/j.aca.2021.338474] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 02/07/2023]
Abstract
Surface enhanced Raman spectroscopy (SERS) is a powerful technique for sensitive analysis which is attracting great attention in the last decades. In this review, different gold nanostructures that have been exploited for SERS analysis are described, ranging from gold nanospheres to anisotropic and complex-shaped gold nanostructures, in which the presence of high aspect ratio features leads to an increment of the electromagnetic field at the surface of the nanomaterial, resulting in enhanced SERS response. In addition to the shape of the nanostructure, the interparticle nanogaps play a prominent role in the SERS efficiency. In this sense, different approaches such as nanoaggregation and formation of assemblies and ordered structures lead to the creation of the so-called hot spots. SERS measurements may be performed in solution, while usually the nanostructures are deposited building a SERS substrate, which can be created via attachment of chemically prepared gold nanostructures, as well as via top-down physical methods. Among the classical supports for creating the SERS substrates, in the last years there is a trend towards the development of flexible supports based on polymers as well as paper. Finally, some recent applications of gold nanostructures-based SERS substrates within the analytical field are discussed to spotlight the potential of this technique in real-world analytical scenarios.
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Affiliation(s)
- Ángela I López-Lorente
- Departamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071, Córdoba, Spain.
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7
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Perumal J, Wang Y, Attia ABE, Dinish US, Olivo M. Towards a point-of-care SERS sensor for biomedical and agri-food analysis applications: a review of recent advancements. NANOSCALE 2021; 13:553-580. [PMID: 33404579 DOI: 10.1039/d0nr06832b] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The growing demand for reliable and robust methodology in bio-chemical sensing calls for the continuous advancement of sensor technologies. Over the last two decades, surface-enhanced Raman spectroscopy (SERS) has emerged as one of the most promising analytical techniques for sensitive and trace analysis or detection in biomedical and agri-food applications. SERS overcomes the inherent sensitivity limitation associated with Raman spectroscopy, which provides vibrational "fingerprint" spectra of molecules that makes it unique and versatile among other spectroscopy techniques. This paper comprehensively reviews the recent advancements of SERS for biomedical, food and agricultural applications over the last 6 years, and we envision that, in the near future, some of these platforms have the potential to be translated as a point-of-care and rapid sensor for real-life end-user applications. The merits and limitations of various SERS sensor designs are analysed and discussed based on critical features such as sensitivity, specificity, usability, repeatability and reproducibility. We conclude by highlighting the opportunities and challenges in the field while stressing the technological gaps to be addressed in realizing commercially viable point-of-care SERS sensors for practical biomedical and agri-food technological applications.
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Affiliation(s)
- Jayakumar Perumal
- Laboratory of Bio-Optical Imaging, Singapore Bioimaging Consortium (SBIC), Agency for Science Technology and Research (A*STAR), Singapore.
| | - Yusong Wang
- Laboratory of Bio-Optical Imaging, Singapore Bioimaging Consortium (SBIC), Agency for Science Technology and Research (A*STAR), Singapore.
| | - Amalina Binte Ebrahim Attia
- Laboratory of Bio-Optical Imaging, Singapore Bioimaging Consortium (SBIC), Agency for Science Technology and Research (A*STAR), Singapore.
| | - U S Dinish
- Laboratory of Bio-Optical Imaging, Singapore Bioimaging Consortium (SBIC), Agency for Science Technology and Research (A*STAR), Singapore.
| | - Malini Olivo
- Laboratory of Bio-Optical Imaging, Singapore Bioimaging Consortium (SBIC), Agency for Science Technology and Research (A*STAR), Singapore.
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Mandrile L, Giovannozzi AM, Sacco A, Martra G, Rossi AM. Flexible and Transparent Substrates Based on Gold Nanoparticles and TiO 2 for in Situ Bioanalysis by Surface-Enhanced Raman Spectroscopy. BIOSENSORS 2019; 9:E145. [PMID: 31861199 PMCID: PMC6955768 DOI: 10.3390/bios9040145] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/06/2019] [Accepted: 12/13/2019] [Indexed: 11/28/2022]
Abstract
Flexible and transparent substrates are emerging as low cost and easy-to-operate support for surface-enhanced Raman spectroscopy (SERS). In particular, in situ SERS detection approach for surface characterization in transmission modality can be efficiently employed for non-invasive analysis of non-planar surfaces. Here we propose a new methodology to fabricate a homogenous, transparent, and flexible SERS membrane by the assistance of a thin TiO2 porous layer deposited on the PDMS surface, which supports the uniform loading of gold nanoparticles over large area. The substrate was first characterized for homogeneity, sensitivity and repeatability using a model molecule for SERS, i.e., 7-mercapto-4-methylcoumarin. Satisfactory intra-substrate uniformity and inter-substrates repeatability was achieved, showing an RSD of 10%, and an analytical sensitivity down to 10 nM was determined with an EF of 3.4 × 105 ± 0.4 × 105. Furthermore, SERS detection of pyrimethanil (PMT), a commonly employed pesticide in crops for human consumption, was performed in situ, exploiting the optical transparency of the device, using both model surfaces and non-flat bio-samples. PMT contamination at the phytochemical concentration levels corresponding to commonly used infield doses was successfully detected on the surface of the yellow Ficus benjiamina leaves, supporting the use of this substrate for food safety in-field application.
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Affiliation(s)
- Luisa Mandrile
- Physical Chemistry and Nanotechnologies Group, National Institute of Metrological Research, Strada delle Cacce 91, 10135 Turin, Italy; (L.M.); (A.M.G.); (A.S.); (G.M.)
| | - Andrea Mario Giovannozzi
- Physical Chemistry and Nanotechnologies Group, National Institute of Metrological Research, Strada delle Cacce 91, 10135 Turin, Italy; (L.M.); (A.M.G.); (A.S.); (G.M.)
| | - Alessio Sacco
- Physical Chemistry and Nanotechnologies Group, National Institute of Metrological Research, Strada delle Cacce 91, 10135 Turin, Italy; (L.M.); (A.M.G.); (A.S.); (G.M.)
| | - Gianmario Martra
- Physical Chemistry and Nanotechnologies Group, National Institute of Metrological Research, Strada delle Cacce 91, 10135 Turin, Italy; (L.M.); (A.M.G.); (A.S.); (G.M.)
- Department of Chemistry and Interdepartmental Centre NIS, University of Turin, Via Giuria 7, 10125 Turin, Italy
| | - Andrea Mario Rossi
- Physical Chemistry and Nanotechnologies Group, National Institute of Metrological Research, Strada delle Cacce 91, 10135 Turin, Italy; (L.M.); (A.M.G.); (A.S.); (G.M.)
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9
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Screening pesticide residues on fruit peels using portable Raman spectrometer combined with adhesive tape sampling. Food Chem 2019; 295:254-258. [DOI: 10.1016/j.foodchem.2019.05.127] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 05/13/2019] [Accepted: 05/18/2019] [Indexed: 12/24/2022]
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10
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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: 212] [Impact Index Per Article: 42.4] [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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11
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Zong C, Ge M, Pan H, Wang J, Nie X, Zhang Q, Zhao W, Liu X, Yu Y. In situ synthesis of low-cost and large-scale flexible metal nanoparticle–polymer composite films as highly sensitive SERS substrates for surface trace analysis. RSC Adv 2019; 9:2857-2864. [PMID: 35520535 PMCID: PMC9059991 DOI: 10.1039/c8ra08818g] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 01/02/2019] [Indexed: 11/22/2022] Open
Abstract
Surface-enhanced Raman spectroscopy (SERS) has been one of the most promising analytical tools. Despite many efforts in the design of SERS substrates, it remains a great challenge for creating a general flexible substrate that could in situ detect analytes on diverse objects. Herein, we report our attempt to address this issue by developing a facile and versatile method capable of generating silver/gold nanoparticles in situ on the surface of a cellulose acetate (CA) polymer in a simple, cheap, practical, and capping agent-free way. The as-prepared substrates exhibit excellent sensitivity, which enabled detection of Rhodamine 6G at concentrations as low as 10−12 M. Taking advantage of the excellent flexibility and optical transparency of the CA matrix, the highly SERS-active substrate was applied for in situ identification and detection of pesticide residues on fruits. The results indicated that tetramethylthiuram disulfide (TMTD) and thiabendazole (TBZ) can be clearly identified at concentrations as low as 18.05 ng cm−2 and 15.1 ng cm−2, respectively, which were much lower than the maximum permitted residue doses with respect to food safety. Facile and large-scale synthesis of flexible metal nanoparticle–polymer composite films as highly sensitive SERS substrates for in situ food inspection.![]()
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Affiliation(s)
- Chenghua Zong
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Mengyi Ge
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Hong Pan
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Jing Wang
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Xinming Nie
- School of Physics and Electronic Engineering
- Jiangsu Normal University
- Xuzhou
- China
| | - Qingquan Zhang
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Wenfeng Zhao
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Xiaojun Liu
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Yang Yu
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
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12
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Restaino SM, White IM. A critical review of flexible and porous SERS sensors for analytical chemistry at the point-of-sample. Anal Chim Acta 2018; 1060:17-29. [PMID: 30902328 DOI: 10.1016/j.aca.2018.11.057] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 11/27/2018] [Accepted: 11/29/2018] [Indexed: 12/26/2022]
Abstract
For decades surface enhanced Raman spectroscopy (SERS) has been intensely investigated as a possible solution for performing analytical chemistry at the point of sample origin. Unfortunately, due to cost and usability constraints, conventional rigid SERS sensors and microfluidic SERS sensors have yet to make a significant impact outside of the realm of academics. However, the recently introduced flexible and porous paper-based SERS sensors are proving to be widely adaptable to realistic usage cases in the field. In contrast to rigid and microfluidic SERS sensors, paper SERS sensors feature (i) the potential for roll-to-roll manufacturing methods that enable low sensor cost, (ii) simple sample collection directly onto the sensor via swabbing or dipping, and (iii) equipment-free separations for sample cleanup. In this review we argue that movement to paper-based SERS sensors will finally enable point-of-sample analytical chemistry applications. In addition, we present and compare the numerous fabrication techniques for paper SERS sensors and we describe various sample collection and sample clean-up capabilities of paper SERS sensors, with a focus on how these features enable practical applications in the field. Finally, we present our expectations for the future, including emerging ideas inspired by paper SERS.
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Affiliation(s)
| | - Ian M White
- Fischell Department of Bioengineering, University of Maryland, United States.
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13
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Wang Y, Jin Y, Xiao X, Zhang T, Yang H, Zhao Y, Wang J, Jiang K, Fan S, Li Q. Flexible, transparent and highly sensitive SERS substrates with cross-nanoporous structures for fast on-site detection. NANOSCALE 2018; 10:15195-15204. [PMID: 29845168 DOI: 10.1039/c8nr01628c] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A flexible and transparent film assembled from the cross-nanoporous structures of Au on PET (CNS of Au@PET) is developed as a versatile and effective SERS substrate for rapid, on-site trace analysis with high sensitivity. The fabrication of the CNS of Au can be achieved on a large scale at low cost by employing an etching process with super-aligned carbon nanotubes as a mask, followed by metal deposition. A strongly enhanced Raman signal with good uniformity can be obtained, which is attributed to the excitation of "hot spots" around the metal nanogaps and sharp edges. Using the CNS of Au@PET film as a SERS platform, real-time and on-site SERS detection of the food contaminant crystal violet (CV) is achieved, with a detection limit of CV solution on a tomato skin of 10-7 M. Owing to its ability to efficiently extract trace analytes, the resulting substrate also achieves detection of 4-ATP contaminants and thiram pesticides by swabbing the skin of an apple. A SERS detection signal for 4-ATP has a relative standard deviation of less than 10%, revealing the excellent reproducibility of the substrate. The flexible, transparent and highly sensitive substrates fabricated using this simple and cost-effective strategy are promising for practical application in rapid, on-site SERS-based detection.
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Affiliation(s)
- Yingcheng Wang
- State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics & Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China.
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14
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Shi R, Liu X, Ying Y. Facing Challenges in Real-Life Application of Surface-Enhanced Raman Scattering: Design and Nanofabrication of Surface-Enhanced Raman Scattering Substrates for Rapid Field Test of Food Contaminants. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6525-6543. [PMID: 28920678 DOI: 10.1021/acs.jafc.7b03075] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is capable of detecting a single molecule with high specificity and has become a promising technique for rapid chemical analysis of agricultural products and foods. With a deeper understanding of the SERS effect and advances in nanofabrication technology, SERS is now on the edge of going out of the laboratory and becoming a sophisticated analytical tool to fulfill various real-world tasks. This review focuses on the challenges that SERS has met in this progress, such as how to obtain a reliable SERS signal, improve the sensitivity and specificity in a complex sample matrix, develop simple and user-friendly practical sensing approach, reduce the running cost, etc. This review highlights the new thoughts on design and nanofabrication of SERS-active substrates for solving these challenges and introduces the recent advances of SERS applications in this area. We hope that our discussion will encourage more researches to address these challenges and eventually help to bring SERS technology out of the laboratory.
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Affiliation(s)
- Ruyi Shi
- College of Biosystems Engineering and Food Science , Zhejiang University , 866 Yuhangtang Road , Hangzhou , Zhejiang 310058 , China
| | - Xiangjiang Liu
- College of Biosystems Engineering and Food Science , Zhejiang University , 866 Yuhangtang Road , Hangzhou , Zhejiang 310058 , China
| | - Yibin Ying
- College of Biosystems Engineering and Food Science , Zhejiang University , 866 Yuhangtang Road , Hangzhou , Zhejiang 310058 , China
- Zhejiang A&F University , 88 Huanchengdong Road , Hangzhou , Zhejiang 311300 , China
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15
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Zhang X, Rakesh KP, Shantharam CS, Manukumar HM, Asiri AM, Marwani HM, Qin HL. Podophyllotoxin derivatives as an excellent anticancer aspirant for future chemotherapy: A key current imminent needs. Bioorg Med Chem 2017; 26:340-355. [PMID: 29269253 DOI: 10.1016/j.bmc.2017.11.026] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/13/2017] [Accepted: 11/15/2017] [Indexed: 12/15/2022]
Abstract
Cancer is one of the leading groups of threatened caused by abnormal state cell growth and second leading diseases involved in the major global death. To treat this, research looking for promising anticancer drugs from natural resource, or synthesized novel molecules by diverse group of scientists worldwide. Currently, drugs get into clinical practices and showing side effects with target actions which in turn leading to multidrug resistance unknowingly. Podophyllotoxin, a naturally occurring lignan and with hybrids have become one of the most attractive subjects due to their broad spectrum of pharmacological activities. Podophyllotoxin derivatives have been the centre of attention of extensive chemical amendment and pharmacological investigation in modern decades. Mainly, the innovation of the semi-synthetic anticancer drugs etoposide and teniposide has stimulated prolonged research interest in this structural phenotype. The present review focuses mainly onnew anticancer drugs from podophyllotoxin analogs, mechanism of action and their structure-activity relationships (SAR) as potential anticancer candidates for future discovery of suitable drug candidates.
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Affiliation(s)
- Xu Zhang
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430073, PR China
| | - K P Rakesh
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430073, PR China.
| | - C S Shantharam
- Department of Chemistry, Pooja Bhagavath Memorial Mahajana Education Centre, Mysuru 570016, Karnataka, India
| | - H M Manukumar
- Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysuru 570006, Karnataka, India
| | - A M Asiri
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - H M Marwani
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Hua-Li Qin
- Department of Pharmaceutical Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430073, PR China.
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16
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Zhang C, Yi P, Peng L, Lai X, Chen J, Huang M, Ni J. Continuous fabrication of nanostructure arrays for flexible surface enhanced Raman scattering substrate. Sci Rep 2017; 7:39814. [PMID: 28051175 PMCID: PMC5209699 DOI: 10.1038/srep39814] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 11/28/2016] [Indexed: 11/09/2022] Open
Abstract
Surface-enhanced Raman spectroscopy (SERS) has been a powerful tool for applications including single molecule detection, analytical chemistry, electrochemistry, medical diagnostics and bio-sensing. Especially, flexible SERS substrates are highly desirable for daily-life applications, such as real-time and in situ Raman detection of chemical and biological targets, which can be used onto irregular surfaces. However, it is still a major challenge to fabricate the flexible SERS substrate on large-area substrates using a facile and cost-effective technique. The roll-to-roll ultraviolet nanoimprint lithography (R2R UV-NIL) technique provides a solution for the continuous fabrication of flexible SERS substrate due to its high-speed, large-area, high-resolution and high-throughput. In this paper, we presented a facile and cost-effective method to fabricate flexible SERS substrate including the fabrication of polymer nanostructure arrays and the metallization of the polymer nanostructure arrays. The polymer nanostructure arrays were obtained by using R2R UV-NIL technique and anodic aluminum oxide (AAO) mold. The functional SERS substrates were then obtained with Au sputtering on the surface of the polymer nanostructure arrays. The obtained SERS substrates exhibit excellent SERS and flexibility performance. This research can provide a beneficial direction for the continuous production of the flexible SERS substrates.
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Affiliation(s)
- Chengpeng Zhang
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Peiyun Yi
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Linfa Peng
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Xinmin Lai
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Jie Chen
- Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Meizhen Huang
- Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Jun Ni
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109-2125, USA
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17
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Liu X, Wang J, Wang J, Tang L, Ying Y. Flexible and Transparent Surface-Enhanced Raman Scattering (SERS)-Active Metafilm for Visualizing Trace Molecules via Raman Spectral Mapping. Anal Chem 2016; 88:6166-73. [DOI: 10.1021/acs.analchem.6b00858] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Xiangjiang Liu
- College
of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Jingjing Wang
- College
of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Jiajun Wang
- College
of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Longhua Tang
- State
Key Laboratory of Modern Optical Instrumentation, College of Optical
Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yibin Ying
- College
of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
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