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Guler A, Yilmaz A, Oncer N, Sever NI, Cengiz Sahin S, Kavakcıoglu Yardimci B, Yilmaz M. Machine learning-assisted SERS approach enables the biochemical discrimination in Bcl-2 and Mcl-1 expressing yeast cells treated with ketoconazole and fluconazole antifungals. Talanta 2024; 276:126248. [PMID: 38776770 DOI: 10.1016/j.talanta.2024.126248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 05/01/2024] [Accepted: 05/10/2024] [Indexed: 05/25/2024]
Abstract
Antifungal medications are important due to their potential application in cancer treatment either on their own or with traditional treatments. The mechanisms that prevent the effects of these medications and restrict their usage in cancer treatment are not completely understood. The evaluation and discrimination of the possible protective effects of the anti-apoptotic members of the Bcl-2 family of proteins, critical regulators of mitochondrial apoptosis, against antifungal drug-induced cell death has still scientific uncertainties that must be considered. Novel, simple, and reliable strategies are highly demanded to identify the biochemical signature of this phenomenon. However, the complex nature of cells poses challenges for the analysis of cellular biochemical changes or classification. In this study, for the first time, we investigated the probable protective activities of Bcl-2 and Mcl-1 proteins against cell damage induced by ketoconazole (KET) and fluconazole (FLU) antifungal drugs in a yeast model through surface-enhanced Raman spectroscopy (SERS) approach. The proposed SERS platform created robust Raman spectra with a high signal-to-noise ratio. The analysis of SERS spectral data via advanced unsupervised and supervised machine learning methods enabled unquestionable differentiation (100 %) in samples and biomolecular identification. Various SERS bands related to lipids and proteins observed in the analyses suggest that the expression of these anti-apoptotic proteins reduces oxidative biomolecule damage induced by the antifungals. Also, cell viability assay, Annexin V-FITC/PI double staining, and total oxidant and antioxidant status analyses were performed to support Raman measurements. We strongly believe that the proposed approach paves the way for the evaluation of various biochemical structures/changes in various cells.
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Affiliation(s)
- Ayşenur Guler
- Chemistry Department, Graduate School of Natural and Applied Sciences, Pamukkale University, Denizli, Turkey
| | - Asli Yilmaz
- Department of Molecular Biology & Genetics, Faculty of Science, Ataturk University, Erzurum, Turkey
| | - Nazli Oncer
- Department of Nanoscience and Nanoengineering, Graduate School of Natural and Applied Sciences, Ataturk University, Erzurum, Turkey
| | - Nurettin Ilter Sever
- Department of Molecular Biology & Genetics, Faculty of Science, Pamukkale University, Denizli, Turkey
| | - Sevilay Cengiz Sahin
- Department of Molecular Biology & Genetics, Faculty of Science, Pamukkale University, Denizli, Turkey
| | - Berna Kavakcıoglu Yardimci
- Department of Chemistry, Faculty of Science, Pamukkale University, Denizli, Turkey; Advanced Technology Application and Research Center, Pamukkale University, Denizli, Turkey.
| | - Mehmet Yilmaz
- Department of Nanoscience and Nanoengineering, Graduate School of Natural and Applied Sciences, Ataturk University, Erzurum, Turkey; Department of Chemical Engineering, Faculty of Engineering, Ataturk University, Erzurum, Turkey.
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Tang X, Wu Q, Shang L, Liu K, Ge Y, Liang P, Li B. Raman cell sorting for single-cell research. Front Bioeng Biotechnol 2024; 12:1389143. [PMID: 38832129 PMCID: PMC11145634 DOI: 10.3389/fbioe.2024.1389143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 04/08/2024] [Indexed: 06/05/2024] Open
Abstract
Cells constitute the fundamental units of living organisms. Investigating individual differences at the single-cell level facilitates an understanding of cell differentiation, development, gene expression, and cellular characteristics, unveiling the underlying laws governing life activities in depth. In recent years, the integration of single-cell manipulation and recognition technologies into detection and sorting systems has emerged as a powerful tool for advancing single-cell research. Raman cell sorting technology has garnered attention owing to its non-labeling, non-destructive detection features and the capability to analyze samples containing water. In addition, this technology can provide live cells for subsequent genomics analysis and gene sequencing. This paper emphasizes the importance of single-cell research, describes the single-cell research methods that currently exist, including single-cell manipulation and single-cell identification techniques, and highlights the advantages of Raman spectroscopy in the field of single-cell analysis by comparing it with the fluorescence-activated cell sorting (FACS) technique. It describes various existing Raman cell sorting techniques and introduces their respective advantages and disadvantages. The above techniques were compared and analyzed, considering a variety of factors. The current bottlenecks include weak single-cell spontaneous Raman signals and the requirement for a prolonged total cell exposure time, significantly constraining Raman cell sorting technology's detection speed, efficiency, and throughput. This paper provides an overview of current methods for enhancing weak spontaneous Raman signals and their associated advantages and disadvantages. Finally, the paper outlines the detailed information related to the Raman cell sorting technology mentioned in this paper and discusses the development trends and direction of Raman cell sorting.
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Affiliation(s)
- Xusheng Tang
- Key Laboratory of Optical System Advanced Manufacturing Technology, Chinese Academy of Sciences, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Qingyi Wu
- Key Laboratory of Optical System Advanced Manufacturing Technology, Chinese Academy of Sciences, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Lindong Shang
- Key Laboratory of Optical System Advanced Manufacturing Technology, Chinese Academy of Sciences, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Kunxiang Liu
- Key Laboratory of Optical System Advanced Manufacturing Technology, Chinese Academy of Sciences, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yan Ge
- Key Laboratory of Optical System Advanced Manufacturing Technology, Chinese Academy of Sciences, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Peng Liang
- Key Laboratory of Optical System Advanced Manufacturing Technology, Chinese Academy of Sciences, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
- University of Chinese Academy of Sciences, Beijing, China
- Hooke Instruments Ltd., Changchun, China
| | - Bei Li
- Key Laboratory of Optical System Advanced Manufacturing Technology, Chinese Academy of Sciences, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China
- University of Chinese Academy of Sciences, Beijing, China
- Hooke Instruments Ltd., Changchun, China
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3
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Lou C, Yang H, Hou Y, Huang H, Qiu J, Wang C, Sang Y, Liu H, Han L. Microfluidic Platforms for Real-Time In Situ Monitoring of Biomarkers for Cellular Processes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307051. [PMID: 37844125 DOI: 10.1002/adma.202307051] [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: 07/17/2023] [Revised: 09/05/2023] [Indexed: 10/18/2023]
Abstract
Cellular processes are mechanisms carried out at the cellular level that are aimed at guaranteeing the stability of the organism they comprise. The investigation of cellular processes is key to understanding cell fate, understanding pathogenic mechanisms, and developing new therapeutic technologies. Microfluidic platforms are thought to be the most powerful tools among all methodologies for investigating cellular processes because they can integrate almost all types of the existing intracellular and extracellular biomarker-sensing methods and observation approaches for cell behavior, combined with precisely controlled cell culture, manipulation, stimulation, and analysis. Most importantly, microfluidic platforms can realize real-time in situ detection of secreted proteins, exosomes, and other biomarkers produced during cell physiological processes, thereby providing the possibility to draw the whole picture for a cellular process. Owing to their advantages of high throughput, low sample consumption, and precise cell control, microfluidic platforms with real-time in situ monitoring characteristics are widely being used in cell analysis, disease diagnosis, pharmaceutical research, and biological production. This review focuses on the basic concepts, recent progress, and application prospects of microfluidic platforms for real-time in situ monitoring of biomarkers in cellular processes.
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Affiliation(s)
- Chengming Lou
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Hongru Yang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Ying Hou
- Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, 250022, P. R. China
| | - Haina Huang
- Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, 250022, P. R. China
| | - Jichuan Qiu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Chunhua Wang
- Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, 250022, P. R. China
| | - Yuanhua Sang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Hong Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
- Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, 250022, P. R. China
| | - Lin Han
- Institute of Marine Science and Technology, Shandong University, Qingdao, Shandong, 266000, P. R. China
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4
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Yao F, Zhu P, Chen J, Li S, Sun B, Li Y, Zou M, Qi X, Liang P, Chen Q. Synthesis of nanoparticles via microfluidic devices and integrated applications. Mikrochim Acta 2023; 190:256. [PMID: 37301779 DOI: 10.1007/s00604-023-05838-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/16/2023] [Indexed: 06/12/2023]
Abstract
In recent years, nanomaterials have attracted the research intervention of experts in the fields of catalysis, energy, biomedical testing, and biomedicine with their unrivaled optical, chemical, and biological properties. From basic metal and oxide nanoparticles to complex quantum dots and MOFs, the stable preparation of various nanomaterials has always been a struggle for researchers. Microfluidics, as a paradigm of microscale control, is a remarkable platform for online stable synthesis of nanomaterials with efficient mass and heat transfer in microreactors, flexible blending of reactants, and precise control of reaction conditions. We describe the process of microfluidic preparation of nanoparticles in the last 5 years in terms of microfluidic techniques and the methods of microfluidic manipulation of fluids. Then, the ability of microfluidics to prepare different nanomaterials, such as metals, oxides, quantum dots, and biopolymer nanoparticles, is presented. The effective synthesis of some nanomaterials with complex structures and the cases of nanomaterials prepared by microfluidics under extreme conditions (high temperature and pressure), the compatibility of microfluidics as a superior platform for the preparation of nanoparticles is demonstrated. Microfluidics has a potent integration capability to combine nanoparticle synthesis with real-time monitoring and online detection, which significantly improves the quality and production efficiency of nanoparticles, and also provides a high-quality ultra-clean platform for some bioassays.
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Affiliation(s)
- Fuqi Yao
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, 310000, People's Republic of China
| | - Pengpeng Zhu
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, 310000, People's Republic of China
| | - Junjie Chen
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, 310000, People's Republic of China
| | - Suyang Li
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou, 310000, People's Republic of China
| | - Biao Sun
- School of Electrical and Information Engineering, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Yunfeng Li
- College of Information Engineering, China Jiliang University, 310018, Hangzhou, 310000, People's Republic of China
| | - Mingqiang Zou
- Chinese Academy of Inspection and Quarantine (CAIQ), 100123, Beijing, People's Republic of China
| | - Xiaohua Qi
- Chinese Academy of Inspection and Quarantine (CAIQ), 100123, Beijing, People's Republic of China
| | - Pei Liang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou, 310000, People's Republic of China.
| | - Qiang Chen
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, 310000, People's Republic of China.
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5
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Berus SM, Nowicka AB, Wieruszewska J, Niciński K, Kowalska AA, Szymborski TR, Dróżdż I, Borowiec M, Waluk J, Kamińska A. SERS Signature of SARS-CoV-2 in Saliva and Nasopharyngeal Swabs: Towards Perspective COVID-19 Point-of-Care Diagnostics. Int J Mol Sci 2023; 24:ijms24119706. [PMID: 37298658 DOI: 10.3390/ijms24119706] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 06/12/2023] Open
Abstract
In this study, the intrinsic surface-enhanced Raman spectroscopy (SERS)-based approach coupled with chemometric analysis was adopted to establish the biochemical fingerprint of SARS-CoV-2 infected human fluids: saliva and nasopharyngeal swabs. The numerical methods, partial least squares discriminant analysis (PLS-DA) and support vector machine classification (SVMC), facilitated the spectroscopic identification of the viral-specific molecules, molecular changes, and distinct physiological signatures of pathetically altered fluids. Next, we developed the reliable classification model for fast identification and differentiation of negative CoV(-) and positive CoV(+) groups. The PLS-DA calibration model was described by a great statistical value-RMSEC and RMSECV below 0.3 and R2cal at the level of ~0.7 for both type of body fluids. The calculated diagnostic parameters for SVMC and PLS-DA at the stage of preparation of calibration model and classification of external samples simulating real diagnostic conditions evinced high accuracy, sensitivity, and specificity for saliva specimens. Here, we outlined the significant role of neopterin as the biomarker in the prediction of COVID-19 infection from nasopharyngeal swab. We also observed the increased content of nucleic acids of DNA/RNA and proteins such as ferritin as well as specific immunoglobulins. The developed SERS for SARS-CoV-2 approach allows: (i) fast, simple and non-invasive collection of analyzed specimens; (ii) fast response with the time of analysis below 15 min, and (iii) sensitive and reliable SERS-based screening of COVID-19 disease.
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Affiliation(s)
- Sylwia M Berus
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Ariadna B Nowicka
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Julia Wieruszewska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Krzysztof Niciński
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Aneta A Kowalska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Tomasz R Szymborski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Izabela Dróżdż
- Department of Clinical Genetics, Medical University of Łódź, Pomorska 251, 92-213 Łódź, Poland
| | - Maciej Borowiec
- Department of Clinical Genetics, Medical University of Łódź, Pomorska 251, 92-213 Łódź, Poland
| | - Jacek Waluk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
- Faculty of Mathematics and Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815 Warsaw, Poland
| | - Agnieszka Kamińska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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6
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Wu T, Jing T, Lu Y, Zhang F, He P. In Situ Investigation of Intercellular Signal Transduction Based on Detection of Extracellular pH and ROS by Scanning Electrochemical Microscopy. Anal Chem 2023; 95:7468-7474. [PMID: 37134200 DOI: 10.1021/acs.analchem.2c04655] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Intercellular signal transduction plays an important role in the regulation of biological activities. Herein, a Transwell chamber-based two-layer device combined with scanning electrochemical microscopy (SECM) technology has been proposed for in situ investigation of intercellular signal transduction. The cells in the device were cultured on two layers: the lower layer was for signaling cells, and the upper layer was for signal-receiving cells. The extracellular pH (pHe) and ROS (reactive oxygen species, ROSe) were in situ monitored by SECM potentiometric mode and SECM-MPSW (multipotential step waveform), respectively. When the signaling cells, including MCF-7, HeLa, and HFF cells, were electrically stimulated, the ROS release of the signal-receiving cells was promoted. By detecting the pH at the cell surface, it was found that more H+ generated by the signaling cells and two cell layers at a shorter distance could both cause the signal-receiving cells to release more ROS, revealing that H+ is one of the signaling molecules of intercellular communication. This SECM-based in situ monitoring strategy provides an effective way to investigate intercellular signal transduction and explore the corresponding mechanism.
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Affiliation(s)
- Tao Wu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China
| | - Ting Jing
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China
| | - Yuqi Lu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China
| | - Fan Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China
| | - Pingang He
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China
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7
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Bhavya G, De Britto S, Satapute P, Geetha N, Jogaiah S. Biofabricated yeast: super-soldier for detoxification of heavy metals. World J Microbiol Biotechnol 2023; 39:148. [PMID: 37022650 DOI: 10.1007/s11274-023-03596-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 03/27/2023] [Indexed: 04/07/2023]
Abstract
The advances in nanotechnology have shown enormous impacts in environmental technology as a potent weapon for degradation of toxic organic pollutants and detoxification of heavy metals. It is either by in-situ or ex-situ adaptive strategies. Mycoremediation of environmental pollutants has been a success story of the past decade, by employing the wide arsenal of biological capabilities of fungi. Recently, the proficiency and uniqueness of yeast cell surface alterations have encouraged the generation of engineered yeast cells as dye degraders, heavy metal reduction and its recovery, and also as detoxifiers of various hazardous xenobiotic compounds. As a step forward, recent trends in research are towards developing biologically engineered living materials as potent, biocompatible and reusable hybrid nanomaterials. They include chitosan-yeast nanofibers, nanomats, nanopaper, biosilica hybrids, and TiO2-yeast nanocomposites. The nano-hybrid materials contribute significantly as supportive stabilizer, and entrappers, which enhances the biofabricated yeast cells' functionality. This field serves as an eco-friendly cutting-edge cocktail research area. In this review, we highlight recent research on biofabricated yeast cells and yeast-based biofabricated molecules, as potent heavy metals, toxic chemical detoxifiers, and their probable mechanistic properties with future application perspectives.
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Affiliation(s)
- Gurulingaiah Bhavya
- Nanobiotechnology laboratory, Department of Biotechnology, University of Mysore, Manasagangotri, Mysuru, Karnataka, 570006, India
| | - Savitha De Britto
- Division of Biological Sciences, School of Science and Technology, University of Goroka, 441, Goroka, Papua New Guinea
| | - Praveen Satapute
- Laboratory of Plant Healthcare and Diagnostics, Department of Biotechnology and Microbiology, Karnatak University, Dharwad, PG, Karnataka, 580 003, India
| | - Nagaraja Geetha
- Nanobiotechnology laboratory, Department of Biotechnology, University of Mysore, Manasagangotri, Mysuru, Karnataka, 570006, India
| | - Sudisha Jogaiah
- Laboratory of Plant Healthcare and Diagnostics, Department of Biotechnology and Microbiology, Karnatak University, Dharwad, PG, Karnataka, 580 003, India.
- Department of Environmental Science, Central University of Kerala, Tejaswini Hills, Periye (PO), Kasaragod (DT), Periye, Kerala, 671316, India.
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8
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Raveendran J, Docoslis A. Detection and quantification of toxicants in food and water using Ag-Au core-shell fractal SERS nanostructures and multivariate analysis. Talanta 2021; 231:122383. [PMID: 33965045 DOI: 10.1016/j.talanta.2021.122383] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 03/27/2021] [Accepted: 03/29/2021] [Indexed: 12/18/2022]
Abstract
Here we demonstrate a facile, two step formation of silver core - gold shell (Ag-Au) nanostructures using microelectrodes and assess their performance as surface-enhanced Raman scattering (SERS) substrates to detect and quantify toxicants. Ag nanostructures, serving as the scaffolds for the bimetallic structures, were grown first by using electrochemical deposition on the edges of microelectrodes functionalized with the alkanethiol, 11-mercaptoundecanoic acid. Subsequently, different concentrations of HAuCl4 were used to perform a galvanic reaction on the surfaces of the Ag nanostructures with aqueous droplets being placed on the microelectrodes for 10 min before the substrate was rinsed and dried. Lower HAuCl4 concentrations were found to better preserve the fractal morphology of the formed Ag-Au nanostructures, while higher concentrations resulted in Ag-Au fragments. The SERS enhancement factor for the Ag-Au nanostructures was estimated to have a max value of 6.51 x 105. Combining a data reduction technique with a linear classifier, both identification and quantification were demonstrated with 100% success. The toxicants thiram, thiabendazole, malachite green and biphenyl-4-thiol were all detected and identified at 1 ppm. Lastly, as a proof of concept, the Ag-Au nanostructures were transferred to a PDMS film resulting in a flexible SERS substrate capable of direct detection of thiram on an apple peel without any additional sample pre-treatment.
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Affiliation(s)
- Joshua Raveendran
- QuSENS Laboratory, Department of Chemical Engineering, Queen's University, Kingston, ON, K7L 3N6, Canada
| | - Aristides Docoslis
- QuSENS Laboratory, Department of Chemical Engineering, Queen's University, Kingston, ON, K7L 3N6, Canada.
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9
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Xia L, Li G. Recent progress of microfluidics in surface-enhanced Raman spectroscopic analysis. J Sep Sci 2021; 44:1752-1768. [PMID: 33630352 DOI: 10.1002/jssc.202001196] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/20/2021] [Accepted: 02/20/2021] [Indexed: 12/21/2022]
Abstract
Surface-enhanced Raman spectroscopy is a significant analytical tool capable of fingerprint identification of molecule in a rapid and ultrasensitive manner. However, it is still hard to meet the requirements of practical sample analysis. The introduction of microfluidics can effectively enhance the performance of surface-enhanced Raman spectroscopy in complex sample analysis including reproducibility, selectivity, sensitivity, and speed. This review summarizes the recent progress of microfluidics in surface-enhanced Raman spectroscopic analysis through four combination approaches. First, microfluidic synthetic techniques offer uniform nano-/microparticle fabrication approaches for reproductive surface-enhanced Raman spectroscopic analysis. Second, the integration of microchip and surface-enhanced Raman spectroscopic substrate provides advanced devices for sensitive and efficient detection. Third, microfluidic sample preparations enable rapid separation and preconcentration of analyte prior to surface-enhanced Raman spectroscopic detection. Fourth, highly integrated microfluidic devices can be employed to realize multistep surface-enhanced Raman spectroscopic analysis containing material fabrication, sample preparation, and detection processes. Furthermore, the challenges and outlooks of the application of microfluidics in surface-enhanced Raman spectroscopic analysis are discussed.
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Affiliation(s)
- Ling Xia
- School of Chemistry, Sun Yat-sen University, Guangzhou, P. R. China
| | - Gongke Li
- School of Chemistry, Sun Yat-sen University, Guangzhou, P. R. China
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10
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Li M, Gao Y, Fan X, Wei Y, Hao Q, Qiu T. Origin of layer-dependent SERS tunability in 2D transition metal dichalcogenides. NANOSCALE HORIZONS 2021; 6:186-191. [PMID: 33448271 DOI: 10.1039/d0nh00625d] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Two-dimensional (2D) semiconductors are expected to replace noble metals to become the matrix materials of the next generation of commercial surface-enhanced Raman scattering (SERS) chips. Herein, we systematically studied the influence of the interlayer interaction on the SERS activity of 2D semiconductors from a brand-new perspective and comprehensively analyzed the physicochemical process of 2D semiconductor interlayer modulated SERS. Taking transition metal dichalcogenides as examples, we chose PtSe2 with strong interlayer interactions and ReS2 with weak interlayer interactions to analyze the physicochemical process of 2D semiconductor interlayer modulated SERS by first-principles calculations. PtSe2 and ReS2 samples with various thicknesses were prepared respectively, and the results of comparative experiments proved that the layer-dependent SERS tunability of 2D semiconductors is directly related to the interlayer interaction. This work provided a novel method for further improving the SERS detection limit of 2D semiconductors and a possible strategy for the industrial upgrading of commercial SERS chips.
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Affiliation(s)
- Mingze Li
- School of Physics, Southeast University, Nanjing 211189, P. R. China.
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11
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Development overview of Raman-activated cell sorting devoted to bacterial detection at single-cell level. Appl Microbiol Biotechnol 2021; 105:1315-1331. [PMID: 33481066 DOI: 10.1007/s00253-020-11081-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/17/2020] [Accepted: 12/27/2020] [Indexed: 12/14/2022]
Abstract
Understanding the metabolic interactions between bacteria in natural habitat at the single-cell level and the contribution of individual cell to their functions is essential for exploring the dark matter of uncultured bacteria. The combination of Raman-activated cell sorting (RACS) and single-cell Raman spectra (SCRS) with unique fingerprint characteristics makes it possible for research in the field of microbiology to enter the single cell era. This review presents an overview of current knowledge about the research progress of recognition and assessment of single bacterium cell based on RACS and further research perspectives. We first systematically summarize the label-free and non-destructive RACS strategies based on microfluidics, microdroplets, optical tweezers, and specially made substrates. The importance of RACS platforms in linking target cell genotype and phenotype is highlighted and the approaches mentioned in this paper for distinguishing single-cell phenotype include surface-enhanced Raman scattering (SERS), biomarkers, stable isotope probing (SIP), and machine learning. Finally, the prospects and challenges of RACS in exploring the world of unknown microorganisms are discussed. KEY POINTS: • Analysis of single bacteria is essential for further understanding of the microbiological world. • Raman-activated cell sorting (RACS) systems are significant protocol for characterizing phenotypes and genotypes of individual bacteria.
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12
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Zdaniauskienė A, Charkova T, Ignatjev I, Melvydas V, Garjonytė R, Matulaitienė I, Talaikis M, Niaura G. Shell-isolated nanoparticle-enhanced Raman spectroscopy for characterization of living yeast cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 240:118560. [PMID: 32526402 DOI: 10.1016/j.saa.2020.118560] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/25/2020] [Accepted: 05/25/2020] [Indexed: 05/13/2023]
Abstract
Studying the biochemistry of yeast cells has enabled scientists to understand many essential cellular processes in human cells. Further development of biotechnological and medical progress requires revealing surface chemistry in living cells by using a non-destructive and molecular structure sensitive technique. In this study shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) was applied for probing the molecular structure of Metschnikowia pulcherrima yeast cells. Important function of studied cells is the ability to eliminate iron from growth media by precipitating the insoluble pigment pulcherrimin. Comparative SERS and SHINERS analysis of the yeast cells in combination with bare Au and shell-isolated Au@SiO2 nanoparticles were performed. It was observed that additional bands, such as adenine ring-related vibrational modes appear due to interaction with bare Au nanoparticles; the registered spectra do not coincide with the spectra where Au@SiO2 nanoparticles were used. SHINERS spectra of M. pulcherrima were significantly enhanced comparing to the Raman spectra. Based on first-principles calculations and 830-nm excited Raman analysis of pulcherrimin, the SHINERS signatures of iron pigment in yeast cells were revealed. Being protected from direct interaction of metal with adsorbate, Au@SiO2 nanoparticles yield reproducible and reliable vibrational signatures of yeast cell wall constituents.
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Affiliation(s)
- Agnė Zdaniauskienė
- Department of Organic Chemistry, Center for Physical Sciences and Technology (FTMC), Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
| | - Tatjana Charkova
- Department of Organic Chemistry, Center for Physical Sciences and Technology (FTMC), Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
| | - Ilja Ignatjev
- Department of Organic Chemistry, Center for Physical Sciences and Technology (FTMC), Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
| | | | - Rasa Garjonytė
- Department of Organic Chemistry, Center for Physical Sciences and Technology (FTMC), Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
| | - Ieva Matulaitienė
- Department of Organic Chemistry, Center for Physical Sciences and Technology (FTMC), Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
| | - Martynas Talaikis
- Department of Bioelectrochemistry and Biospectroscopy, Institute of Biochemistry, Life Sciences Center, Vilnius University, Saulėtekio av. 7, LT-10257 Vilnius, Lithuania
| | - Gediminas Niaura
- Department of Organic Chemistry, Center for Physical Sciences and Technology (FTMC), Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania.
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13
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Berus S, Witkowska E, Niciński K, Sadowy E, Puzia W, Ronkiewicz P, Kamińska A. Surface-enhanced Raman scattering as a discrimination method of Streptococcus spp. and alternative approach for identifying capsular types of S. pneumoniae isolates. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 233:118088. [PMID: 32146423 DOI: 10.1016/j.saa.2020.118088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/07/2020] [Accepted: 01/20/2020] [Indexed: 06/10/2023]
Abstract
The surface-enhanced Raman spectroscopy (SERS) is a method known for its effectiveness in detecting and identifying microorganisms, that was employed to differentiate various bacterial strains both at genus and species level. In this work, we have examined five species belonging to Streptococcus genus, namely S. pneumoniae, S. suis, S. pseudopneumoniae, S. oralis, and S. mitis. Additionally, we conducted SERS experiments on ten S. pneumoniae strains, representing different capsular types. In all of cases we obtained unique SERS signals being spectroscopic fingerprints of bacterial strains tested. Moreover, the principal component analysis (PCA) was performed in order to prove that the spectra of all studied strains can be well separated into five (in case of streptococcal strains) or ten (in case of pneumococcal serotypes) groups. In both investigated situations, the separation at the level of 95% was achieved, proving that SERS-PCA-based method can be used for reliable and fast identification of different strains belonging to the Streptococcus genus, including encapsulated pneumococcal isolates.
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Affiliation(s)
- S Berus
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - E Witkowska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - K Niciński
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - E Sadowy
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland
| | - W Puzia
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; Institute of Biochemistry and Biophysics, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - P Ronkiewicz
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland
| | - A Kamińska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
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14
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'Mixing-and-measuring' surface-enhanced Raman scattering (SERS) detection of Bacillus cereus for potentially aiding gold mine field exploration. Talanta 2019; 204:44-49. [PMID: 31357318 DOI: 10.1016/j.talanta.2019.05.068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 05/13/2019] [Accepted: 05/16/2019] [Indexed: 10/26/2022]
Abstract
Bacillus cereus, a common soil bacterium, has been shown to act as a biogeochemical indicator for concealed mineralisations, e.g., vein-type Au deposits. Field and cultivation-free detection of Bacillus cereus in the presence of Au3+ and other metal ions is significantly important but still almost blank in current biogeochemical prospecting of gold mine system. Herein, a self-established simple approach was slightly improved to make silver nanoparticles (Ag NPs) rapidly concentrated on every bacterial cell, and highly strong and distinct surface-enhanced Raman scattering (SERS) signals of Bacillus cereus free from any native fluorescence have been obtained in a so called 'mixing-and-measuring' manner. Furthermore, SERS was used for the first time to our knowledge to investigate the impacts of different concentrations of metal ions on Bacillus cereus, and successfully utilized for distinguishing Au3+ ions from other species. A more convincing multi-Raman criterion based on Raman bands, and further the entire Raman spectrum in combination with statistical analysis (e.g., principal component analysis (PCA)) were found capable of detecting spectral differences of Bacillus cereus in the presence of metal ions (Au3+, Ag+, Cu2+ and Zn2+) with different concentrations. An interesting phenomenon has been found that except for Au3+ ions, the highest permissive concentration of other metal ions for the detected Bacillus cereus is up to 10 μg/mL possibly due to their resistance to Au. The results also indicate that an effective biogeochemical exploration technique of SERS spectral response may be developed, where Bacillus cereus spore counts are measured in the field and used as a pre-screening method to target areas useful for further sampling and complete geochemical analysis.
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15
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Ochoa-Vazquez G, Kharisov B, Arizmendi-Morquecho A, Cario A, Aymonier C, Marre S, Lopez I. Microfluidics and Surface-Enhanced Raman Spectroscopy: A Perfect Match for New Analytical Tools. IEEE Trans Nanobioscience 2019; 18:558-566. [PMID: 31545740 DOI: 10.1109/tnb.2019.2943078] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In this perspective article, we emphasize the combination of Surface-Enhanced Raman Spectroscopy (SERS) and Microfluidic devices. SERS approaches have been widely studied and used for multiple applications including trace molecules detection, in situ analysis of biological samples and monitoring or, all of them with good results, however still with limitations of the technique, for example regarding with improved precision and reproducibility. These implications can be overcome by microfluidic approaches. The resulting coupling Microfluidics - SERS (MF-SERS) has recently gained increasing attention by creating thundering opportunities for the analytical field. For this purpose, we introduce some of the strategies developed to implement SERS within microfluidic reactor along with a brief overview of the most recent MF-SERS applications for biology, health and environmental concerns. Eventually, we will discuss future research opportunities of such systems.
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16
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Yan S, Chu F, Zhang H, Yuan Y, Huang Y, Liu A, Wang S, Li W, Li S, Wen W. Rapid, one-step preparation of SERS substrate in microfluidic channel for detection of molecules and heavy metal ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 220:117113. [PMID: 31141779 DOI: 10.1016/j.saa.2019.05.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 05/05/2019] [Accepted: 05/09/2019] [Indexed: 06/09/2023]
Abstract
On-chip fabrication of surface-enhanced Raman spectroscopy (SERS)-active materials enables continuous, real-time sensing of targets in the microfluidic chip. However, the current techniques require the time-consuming, complicated process and costly, bulky facilities. In this work, we present a novel method for synthesis of Ag nanostructures in a microfluidic channel via one-step electroless galvanic replacement reaction. The whole reaction could be achieved <10 mins, while the traditional methods take hours. The microfluidic channel has a Cu base, which can reduce Ag ions to Ag nanoparticles in the presence of AgNO3 solution. The new technique enables the label-free sensing of chemical molecules (i.e., methylene blue) and biomolecules (i.e., urea). Two proof-of-concept experiments are performed to verify the utilization of the prepared SERS substrate. First, the microfluidics-assisted SERS sensor is used to detect Hg ions in aqueous solution with high sensitivity and good selectivity. Second, the fabricated SERS-active material can couple with a concentration gradient generator for continuous SERS detection. This simple technique can be used in any laboratory without any bulky equipment and can realize numerous lab-on-a-chip applications with the integration of other microfluidic networks.
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Affiliation(s)
- Sheng Yan
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing, 401331, China; Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China..
| | - Fangjia Chu
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing, 401331, China
| | - Haiyan Zhang
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing, 401331, China
| | - Yuan Yuan
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing, 401331, China
| | - Yingzhou Huang
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing, 401331, China; Institute of Industrial Technology, Chongqing University, Chongqing 400044, China
| | - Anping Liu
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing, 401331, China; Institute of Industrial Technology, Chongqing University, Chongqing 400044, China
| | - Shuxia Wang
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing, 401331, China
| | - Weihua Li
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Shunbo Li
- Key Disciplines Laboratory of Novel Micro-Nano Devices and System Technology and Key Laboratory of Optoelectronic Technology and Systems, Ministry of Education, School of Optoelectronics Engineering, Chongqing University, Chongqing 400044, China..
| | - Weijia Wen
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing, 401331, China; Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China..
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17
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Eremina OE, Semenova AA, Sergeeva EA, Brazhe NA, Maksimov GV, Shekhovtsova TN, Goodilin EA, Veselova IA. Surface-enhanced Raman spectroscopy in modern chemical analysis: advances and prospects. RUSSIAN CHEMICAL REVIEWS 2018. [DOI: 10.1070/rcr4804] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Salemmilani R, Piorek BD, Mirsafavi RY, Fountain AW, Moskovits M, Meinhart CD. Dielectrophoretic Nanoparticle Aggregation for On-Demand Surface Enhanced Raman Spectroscopy Analysis. Anal Chem 2018; 90:7930-7936. [PMID: 29863841 DOI: 10.1021/acs.analchem.8b00510] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Rapid chemical identification of drugs of abuse in biological fluids such as saliva is of growing interest in healthcare and law enforcement. Accordingly, a label-free detection platform that accepts biological fluid samples is of great practical value. We report a microfluidics-based dielectrophoresis-induced surface enhanced Raman spectroscopy (SERS) device, which is capable of detecting physiologically relevant concentrations of methamphetamine in saliva in under 2 min. In this device, iodide-modified silver nanoparticles are trapped and released on-demand using electrodes integrated in a microfluidic channel. Principal component analysis (PCA) is used to reliably distinguish methamphetamine-positive samples from the negative control samples. Passivation of the electrodes and flow channels minimizes microchannel fouling by nanoparticles, which allows the device to be cleared and reused multiple times.
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Affiliation(s)
- Reza Salemmilani
- Department of Mechanical Engineering , University of California Santa Barbara , Santa Barbara , California 93106 , United States
| | - Brian D Piorek
- Department of Mechanical Engineering , University of California Santa Barbara , Santa Barbara , California 93106 , United States
| | - Rustin Y Mirsafavi
- Department of Biomolecular Science and Engineering , University of California Santa Barbara , Santa Barbara , California 93106 , United States
| | - Augustus W Fountain
- Research and Technology Directorate , Edgewood Chemical Biological Center , Aberdeen Proving Ground , Maryland 21010-5424 , United States
| | - Martin Moskovits
- Department of Chemistry and Biochemistry , University of California Santa Barbara , Santa Barbara , California 93106 , United States
| | - Carl D Meinhart
- Department of Mechanical Engineering , University of California Santa Barbara , Santa Barbara , California 93106 , United States
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19
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Tang SY, Qiao R, Yan S, Yuan D, Zhao Q, Yun G, Davis TP, Li W. Microfluidic Mass Production of Stabilized and Stealthy Liquid Metal Nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800118. [PMID: 29682878 DOI: 10.1002/smll.201800118] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 02/27/2018] [Indexed: 05/20/2023]
Abstract
Functional nanoparticles comprised of liquid metals, such as eutectic gallium indium (EGaIn) and Galinstan, present exciting opportunities in the fields of flexible electronics, sensors, catalysts, and drug delivery systems. Methods used currently for producing liquid metal nanoparticles have significant disadvantages as they rely on both bulky and expensive high-power sonication probe systems, and also generally require the use of small molecules bearing thiol groups to stabilize the nanoparticles. Herein, an innovative microfluidics-enabled platform is described as an inexpensive, easily accessible method for the on-chip mass production of EGaIn nanoparticles with tunable size distributions in an aqueous medium. A novel nanoparticle-stabilization approach is reported using brushed polyethylene glycol chains with trithiocarbonate end-groups negating the requirements for thiol additives while imparting a "stealth" surface layer. Furthermore, a surface modification of the nanoparticles is demonstrated using galvanic replacement and conjugation with antibodies. It is envisioned that the demonstrated microfluidic technique can be used as an economic and versatile platform for the rapid production of liquid metal-based nanoparticles for a range of biomedical applications.
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Affiliation(s)
- Shi-Yang Tang
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Ruirui Qiao
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, 3052, Australia
| | - Sheng Yan
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Dan Yuan
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Qianbin Zhao
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Guolin Yun
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Thomas P Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, 3052, Australia
- Department of Chemistry, University of Warwick, Gibbet Hill, CV4 7AL, Coventry, UK
| | - Weihua Li
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia
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20
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Tsoutsi D, Sanles-Sobrido M, Cabot A, Gil PR. Common Aspects Influencing the Translocation of SERS to Biomedicine. Curr Med Chem 2018; 25:4638-4652. [PMID: 29303073 PMCID: PMC6302347 DOI: 10.2174/0929867325666180105101841] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 12/05/2017] [Accepted: 12/05/2017] [Indexed: 11/22/2022]
Abstract
This review overviews the impact in biomedicine of surface enhanced. Raman scattering motivated by the great potential we believe this technique has. We present the advantages and limitations of this technique relevant to bioanalysis in vitro and in vivo and how this technique goes beyond the state of the art of traditional analytical, labelling and healthcare diagnostic technologies.
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Affiliation(s)
| | | | | | - Pilar Rivera Gil
- Address correspondence to this author at the Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona, Spain; Tel/Fax: +34933160918; E-mail:
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21
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Murphy TW, Zhang Q, Naler LB, Ma S, Lu C. Recent advances in the use of microfluidic technologies for single cell analysis. Analyst 2017; 143:60-80. [PMID: 29170786 PMCID: PMC5839671 DOI: 10.1039/c7an01346a] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The inherent heterogeneity in cell populations has become of great interest and importance as analytical techniques have improved over the past decades. With the advent of personalized medicine, understanding the impact of this heterogeneity has become an important challenge for the research community. Many different microfluidic approaches with varying levels of throughput and resolution exist to study single cell activity. In this review, we take a broad view of the recent microfluidic developments in single cell analysis based on microwell, microchamber, and droplet platforms. We cover physical, chemical, and molecular biology approaches for cellular and molecular analysis including newly emerging genome-wide analysis.
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Affiliation(s)
- Travis W Murphy
- Department of Chemical Engineering, Virginia Tech, Blacksburg, VA 24061, USA.
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22
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Uusitalo S, Popov A, Ryabchikov YV, Bibikova O, Alakomi HL, Juvonen R, Kontturi V, Siitonen S, Kabashin A, Meglinski I, Hiltunen J, Laitila A. Surface-enhanced Raman spectroscopy for identification and discrimination of beverage spoilage yeasts using patterned substrates and gold nanoparticles. J FOOD ENG 2017. [DOI: 10.1016/j.jfoodeng.2017.05.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Liu Y, Zhou H, Hu Z, Yu G, Yang D, Zhao J. Label and label-free based surface-enhanced Raman scattering for pathogen bacteria detection: A review. Biosens Bioelectron 2017; 94:131-140. [DOI: 10.1016/j.bios.2017.02.032] [Citation(s) in RCA: 183] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 02/20/2017] [Accepted: 02/22/2017] [Indexed: 12/21/2022]
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24
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Li X, Soler M, Özdemir CI, Belushkin A, Yesilköy F, Altug H. Plasmonic nanohole array biosensor for label-free and real-time analysis of live cell secretion. LAB ON A CHIP 2017; 17:2208-2217. [PMID: 28585972 DOI: 10.1039/c7lc00277g] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Cell secretion dynamics plays a central role in physiological and disease processes. Due to its various temporal profiles, it is essential to implement a precise detection scheme for continuous monitoring of secretion in real time. The current fluorescent and colorimetric approaches hinder such applications due to their multiple time-consuming steps, molecular labeling, and especially the 'snapshot' endpoint readouts. Here, we develop a nanoplasmonic biosensor for real-time monitoring of live cell cytokine secretion in a label-free configuration. Our nanoplasmonic biosensor is composed of gold nanohole arrays supporting extraordinary optical transmission (EOT), which enables sensitive and high-throughput analysis of biomolecules. The nanobiosensor is integrated with an adjustable microfluidic cell module for the analysis of live cells under well-controlled culture conditions. We achieved an outstanding sensitivity for the detection of vascular endothelial growth factor (VEGF) directly in complex cell media. Significantly, the secretion dynamics from live cancer cells were monitored and quantified for 10 hours while preserving good cell viability. This novel approach of probing cytokine secretion activity is compatible with conventional inverted microscopes found in a common biology laboratory. With its simple optical set-up and label-free detection configuration, we anticipate our nanoplasmonic biosensor to be a powerful tool as a lab-on-chip device to analyze cellular activities for fundamental cell research and biotechnologies.
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Affiliation(s)
- Xiaokang Li
- Institute of Bioengineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland.
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25
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Chen YY, Fang YC, Lin SY, Lin YJ, Yen SY, Huang CH, Yang CY, Chau LK, Wang SC. Corona-induced micro-centrifugal flows for concentration of Neisseria and Salmonella bacteria prior to their quantitation using antibody-functionalized SERS-reporter nanobeads. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2077-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Hackett LP, Goddard LL, Liu GL. Plasmonic nanocone arrays for rapid and detailed cell lysate surface enhanced Raman spectroscopy analysis. Analyst 2017; 142:4422-4430. [DOI: 10.1039/c7an00630f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A plasmonic nanocone SERS substrate with a uniform enhancement factor is developed and applied for cell lysate studies.
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Affiliation(s)
- L. P. Hackett
- Micro and Nanotechnology Laboratory
- Department of Electrical and Computer Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - L. L. Goddard
- Micro and Nanotechnology Laboratory
- Department of Electrical and Computer Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - G. L. Liu
- Micro and Nanotechnology Laboratory
- Department of Electrical and Computer Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
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27
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Martin JW, Nieuwoudt MK, Vargas MJT, Bodley OLC, Yohendiran TS, Oosterbeek RN, Williams DE, Cather Simpson M. Raman on a disc: high-quality Raman spectroscopy in an open channel on a centrifugal microfluidic disc. Analyst 2017; 142:1682-1688. [DOI: 10.1039/c6an00874g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Novel open-channel centrifugal microfluidic disc design affords measurement of high quality Raman spectra of milk for detecting adulterants at point-of-collection.
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Affiliation(s)
- J. W. Martin
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
- The Photon Factory
| | - M. K. Nieuwoudt
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
- The Photon Factory
| | - M. J. T. Vargas
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
- The Photon Factory
| | - O. L. C. Bodley
- The Photon Factory
- The University of Auckland
- Auckland
- New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - T. S. Yohendiran
- The Photon Factory
- The University of Auckland
- Auckland
- New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - R. N. Oosterbeek
- The Photon Factory
- The University of Auckland
- Auckland
- New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - D. E. Williams
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology
| | - M. Cather Simpson
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
- The Photon Factory
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28
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Jahn IJ, Žukovskaja O, Zheng XS, Weber K, Bocklitz TW, Cialla-May D, Popp J. Surface-enhanced Raman spectroscopy and microfluidic platforms: challenges, solutions and potential applications. Analyst 2017; 142:1022-1047. [DOI: 10.1039/c7an00118e] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The review provides an overview of the development in the field of surface-enhanced Raman spectroscopy combined with microfluidic platforms.
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Affiliation(s)
- I. J. Jahn
- Friedrich Schiller University Jena
- Institute of Physical Chemistry and Abbe Center of Photonics
- 07745 Jena
- Germany
- Leibniz Institute of Photonic Technology Jena
| | - O. Žukovskaja
- Friedrich Schiller University Jena
- Institute of Physical Chemistry and Abbe Center of Photonics
- 07745 Jena
- Germany
| | - X.-S. Zheng
- Leibniz Institute of Photonic Technology Jena
- 07745 Jena
- Germany
| | - K. Weber
- Friedrich Schiller University Jena
- Institute of Physical Chemistry and Abbe Center of Photonics
- 07745 Jena
- Germany
- Leibniz Institute of Photonic Technology Jena
| | - T. W. Bocklitz
- Friedrich Schiller University Jena
- Institute of Physical Chemistry and Abbe Center of Photonics
- 07745 Jena
- Germany
- Leibniz Institute of Photonic Technology Jena
| | - D. Cialla-May
- Friedrich Schiller University Jena
- Institute of Physical Chemistry and Abbe Center of Photonics
- 07745 Jena
- Germany
- Leibniz Institute of Photonic Technology Jena
| | - J. Popp
- Friedrich Schiller University Jena
- Institute of Physical Chemistry and Abbe Center of Photonics
- 07745 Jena
- Germany
- Leibniz Institute of Photonic Technology Jena
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29
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Potential of in vivo real-time gastric gas profiling: a pilot evaluation of heat-stress and modulating dietary cinnamon effect in an animal model. Sci Rep 2016; 6:33387. [PMID: 27633400 PMCID: PMC5025890 DOI: 10.1038/srep33387] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 08/24/2016] [Indexed: 01/12/2023] Open
Abstract
Gastroenterologists are still unable to differentiate between some of the most ordinary disorders of the gut and consequently patients are misdiagnosed. We have developed a swallowable gas sensor capsule for addressing this. The gases of the gut are the by-product of the fermentation processes during digestion, affected by the gut state and can consequently provide the needed information regarding the health of the gut. Here we present the first study on gas sensor capsules for revealing the effect of a medical supplement in an animal (pig) model. We characterise the real-time alterations of gastric-gas in response to environmental heat-stress and dietary cinnamon and use the gas profiles for understanding the bio-physiological changes. Under no heat-stress, feeding increases gastric CO2 concentration, while dietary cinnamon reduces it due to decrease in gastric acid and pepsin secretion. Alternatively, heat-stress leads to hyperventilation in pigs, which reduces CO2 concentration and with the cinnamon treatment, CO2 diminishes even more, resulting in health improvement outcomes. Overall, a good repeatability in gas profiles is also observed. The model demonstrates the strong potential of real-time gas profiler in providing new physiological information that will impact understanding of therapeutics, presenting a highly reliable device for monitoring/diagnostics of gastrointestinal disorders.
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30
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Hotspots engineering by grafting Au@Ag core-shell nanoparticles on the Au film over slightly etched nanoparticles substrate for on-site paraquat sensing. Biosens Bioelectron 2016; 86:944-950. [PMID: 27498319 DOI: 10.1016/j.bios.2016.06.082] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 06/13/2016] [Accepted: 06/28/2016] [Indexed: 01/26/2023]
Abstract
Paraquat (PQ) pollutions are ultra-toxic to human beings and hard to be decomposed in the environment, thus requiring an on-site detection strategy. Herein, we developed a robust and rapid PQ sensing strategy based on the surface-enhanced Raman scattering (SERS) technique. A hybrid SERS substrate was prepared by grafting the Au@Ag core-shell nanoparticles (NPs) on the Au film over slightly etched nanoparticles (Au FOSEN). Hotspots were engineered at the junctions as indicated by the finite difference time domain calculation. SERS performance of the hybrid substrate was explored using p-ATP as the Raman probe. The hybrid substrate gives higher enhancement factor comparing to either the Au FOSEN substrate or the Au@Ag core-shell NPs, and exhibits excellent reproducibility, homogeneity and stability. The proposed SERS substrates were prepared in batches for the practical PQ sensing. The total analysis time for a single sample, including the pre-treatment and measurement, was less than 5min with a PQ detection limit of 10nM. Peak intensities of the SERS signal were plotted as a function of the PQ concentrations to calibrate the sensitivity by fitting the Hill's equation. The plotted calibration curve showed a good log-log linearity with the coefficient of determination of 0.98. The selectivity of the sensing proposal was based on the "finger print" Raman spectra of the analyte. The proposed substrate exhibited good recovery when it applied to real water samples, including lab tap water, bottled water, and commercially obtained apple juice and grape juice. This SERS-based PQ detection method is simple, rapid, sensitive and selective, which shows great potential in pesticide residue and additives abuse monitoring.
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31
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Alsaif MMYA, Field MR, Daeneke T, Chrimes AF, Zhang W, Carey BJ, Berean KJ, Walia S, van Embden J, Zhang B, Latham K, Kalantar-Zadeh K, Ou JZ. Exfoliation Solvent Dependent Plasmon Resonances in Two-Dimensional Sub-Stoichiometric Molybdenum Oxide Nanoflakes. ACS APPLIED MATERIALS & INTERFACES 2016; 8:3482-93. [PMID: 26795577 DOI: 10.1021/acsami.5b12076] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Few-layer two-dimensional (2D) molybdenum oxide nanoflakes are exfoliated using a grinding assisted liquid phase sonication exfoliation method. The sonication process is carried out in five different mixtures of water with both aprotic and protic solvents. We found that surface energy and solubility of mixtures play important roles in changing the thickness, lateral dimension, and synthetic yield of the nanoflakes. We demonstrate an increase in proton intercalation in 2D nanoflakes upon simulated solar light exposure. This results in substoichiometric flakes and a subsequent enhancement in free electron concentrations, producing plasmon resonances. Two plasmon resonance peaks associated with the thickness and the lateral dimension axes are observable in the samples, in which the plasmonic peak positions could be tuned by the choice of the solvent in exfoliating 2D molybdenum oxide. The extinction coefficients of the plasmonic absorption bands of 2D molybdenum oxide nanoflakes in all samples are found to be high (ε > 10(9) L mol(-1) cm(-1)). It is expected that the tunable plasmon resonances of 2D molybdenum oxide nanoflakes presented in this work can be used in future electronic, optical, and sensing devices.
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Affiliation(s)
- Manal M Y A Alsaif
- School of Electrical and Computer Engineering, RMIT University , Melbourne 3001, Australia
| | - Matthew R Field
- RMIT Microscopy and Microanalysis Facility, RMIT University , Melbourne 3001, Australia
| | - Torben Daeneke
- School of Electrical and Computer Engineering, RMIT University , Melbourne 3001, Australia
| | - Adam F Chrimes
- School of Electrical and Computer Engineering, RMIT University , Melbourne 3001, Australia
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich , Zürich 8092, Switzerland
| | - Wei Zhang
- School of Electrical and Computer Engineering, RMIT University , Melbourne 3001, Australia
| | - Benjamin J Carey
- School of Electrical and Computer Engineering, RMIT University , Melbourne 3001, Australia
| | - Kyle J Berean
- School of Electrical and Computer Engineering, RMIT University , Melbourne 3001, Australia
| | - Sumeet Walia
- Functional Materials and Microsystems Research Group, RMIT University , Melbourne 3001, Australia
| | - Joel van Embden
- School of Applied Sciences, RMIT University , Melbourne 3001, Australia
- CSIRO Manufacturing Flagship , Bayview Avenue, Clayton 3168, Australia
| | - Baoyue Zhang
- Xi'an Institute of Electromechanical Information Technology , Xi'an 710000, China
| | - Kay Latham
- School of Applied Sciences, RMIT University , Melbourne 3001, Australia
| | - Kourosh Kalantar-Zadeh
- School of Electrical and Computer Engineering, RMIT University , Melbourne 3001, Australia
| | - Jian Zhen Ou
- School of Electrical and Computer Engineering, RMIT University , Melbourne 3001, Australia
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32
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Liao DS, Raveendran J, Golchi S, Docoslis A. Fast and sensitive detection of bacteria from a water droplet by means of electric field effects and micro-Raman spectroscopy. SENSING AND BIO-SENSING RESEARCH 2015. [DOI: 10.1016/j.sbsr.2015.09.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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33
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Tang SY, Yi P, Soffe R, Nahavandi S, Shukla R, Khoshmanesh K. Using dielectrophoresis to study the dynamic response of single budding yeast cells to Lyticase. Anal Bioanal Chem 2015; 407:3437-48. [DOI: 10.1007/s00216-015-8529-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 01/21/2015] [Accepted: 01/30/2015] [Indexed: 02/03/2023]
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34
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Zhang P, Ren L, Zhang X, Shan Y, Wang Y, Ji Y, Yin H, Huang WE, Xu J, Ma B. Raman-activated cell sorting based on dielectrophoretic single-cell trap and release. Anal Chem 2015; 87:2282-9. [PMID: 25607599 DOI: 10.1021/ac503974e] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Raman-activated cell sorting (RACS) is a promising single-cell technology that holds several significant advantages, as RACS is label-free, information-rich, and potentially in situ. To date, the ability of the technique to identify single cells in a high-speed flow has been limited by inherent weakness of the spontaneous Raman signal. Here we present an alternative pause-and-sort RACS microfluidic system that combines positive dielectrophoresis (pDEP) for single-cell trap and release with a solenoid-valve-suction-based switch for cell separation. This has allowed the integration of trapping, Raman identification, and automatic separation of individual cells in a high-speed flow. By exerting a periodical pDEP field, single cells were trapped, ordered, and positioned individually to the detection point for Raman measurement. As a proof-of-concept demonstration, a mixture of two cell strains containing carotenoid-producing yeast (9%) and non-carotenoid-producing Saccharomyces cerevisiae (91%) was sorted, which enriched the former to 73% on average and showed a fast Raman-activated cell sorting at the subsecond level.
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Affiliation(s)
- Peiran Zhang
- Single Cell Center, CAS Key Laboratory of Biofuels and Shandong Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao, Shandong 266101, China
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35
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Zhang Q, Zhang P, Gou H, Mou C, Huang WE, Yang M, Xu J, Ma B. Towards high-throughput microfluidic Raman-activated cell sorting. Analyst 2015. [DOI: 10.1039/c5an01074h] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Raman-activated cell sorting (RACS) is a promising single-cell analysis technology that is able to identify and isolate individual cells of targeted type, state or environment from an isogenic population or complex consortium of cells, in a label-free and non-invasive manner.
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Affiliation(s)
- Qiang Zhang
- Single-Cell Center
- CAS Key Laboratory of Biofuels and Shandong Key Laboratory of Energy Genetics
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
| | - Peiran Zhang
- Single-Cell Center
- CAS Key Laboratory of Biofuels and Shandong Key Laboratory of Energy Genetics
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
| | - Honglei Gou
- Single-Cell Center
- CAS Key Laboratory of Biofuels and Shandong Key Laboratory of Energy Genetics
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
| | - Chunbo Mou
- College of Chemical Science and Engineering
- Qingdao University
- Qingdao
- China
| | - Wei E. Huang
- Single-Cell Center
- CAS Key Laboratory of Biofuels and Shandong Key Laboratory of Energy Genetics
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
| | - Menglong Yang
- Public Laboratory and CAS Key Laboratory of Biofuels
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- China
| | - Jian Xu
- Single-Cell Center
- CAS Key Laboratory of Biofuels and Shandong Key Laboratory of Energy Genetics
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
| | - Bo Ma
- Single-Cell Center
- CAS Key Laboratory of Biofuels and Shandong Key Laboratory of Energy Genetics
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
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36
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Luo SC, Sivashanmugan K, Liao JD, Yao CK, Peng HC. Nanofabricated SERS-active substrates for single-molecule to virus detection in vitro: A review. Biosens Bioelectron 2014; 61:232-40. [DOI: 10.1016/j.bios.2014.05.013] [Citation(s) in RCA: 189] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 05/02/2014] [Accepted: 05/05/2014] [Indexed: 10/25/2022]
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37
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Lin HY, Huang CH, Hsieh WH, Liu LH, Lin YC, Chu CC, Wang ST, Kuo IT, Chau LK, Yang CY. On-line SERS detection of single bacterium using novel SERS nanoprobes and a microfluidic dielectrophoresis device. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:4700-10. [PMID: 25115777 DOI: 10.1002/smll.201401526] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/12/2014] [Indexed: 05/12/2023]
Abstract
The integration of novel surface-enhanced Raman scattering (SERS) nanoprobes and a microfluidic dielectrophoresis (DEP) device is developed for rapid on-line SERS detection of Salmonella enterica serotype Choleraesuis and Neisseria lactamica. The SERS nanoprobes are prepared by immobilization of specific antibody onto the surface of nanoaggregate-embedded beads (NAEBs), which are silica-coated, dye-induced aggregates of a small number of gold nanoparticles (AuNPs). Each NAEB gives highly enhanced Raman signals owing to the presence of well-defined plasmonic hot spots at junctions between AuNPs. Herein, the on-line SERS detection and accurate identification of suspended bacteria with a detection capability down to a single bacterium has been realized by the NAEB-DEP-Raman spectroscopy biosensing strategy. The practical detection limit with a measurement time of 10 min is estimated to be 70 CFU mL(-1) . In comparison with whole-cell enzyme-linked immunosorbent assay (ELISA), the SERS-nanoprobe-based biosensing method provides advantages of higher sensitivity and requiring lower amount of antibody in the assay (100-fold less). The total assay time including sample pretreatment is less than 2 h. Hence, this sensing strategy is promising for faster and effective on-line multiplex detection of single pathogenic bacterium by using different bioconjugated SERS nanoprobes.
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Affiliation(s)
- Hsing-Ying Lin
- Department of Chemistry and Biochemistry and Center for Nano Bio-Detection (AIM-HI), National Chung Cheng University, Chiayi, 62102, Taiwan
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38
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High resolution scanning electron microscopy of cells using dielectrophoresis. PLoS One 2014; 9:e104109. [PMID: 25089528 PMCID: PMC4121316 DOI: 10.1371/journal.pone.0104109] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 07/08/2014] [Indexed: 12/02/2022] Open
Abstract
Ultrastructural analysis of cells can reveal valuable information about their morphological, physiological, and biochemical characteristics. Scanning electron microscopy (SEM) has been widely used to provide high-resolution images from the surface of biological samples. However, samples need to be dehydrated and coated with conductive materials for SEM imaging. Besides, immobilizing non-adherent cells during processing and analysis is challenging and requires complex fixation protocols. In this work, we developed a novel dielectrophoresis based microfluidic platform for interfacing non-adherent cells with high-resolution SEM at low vacuum mode. The system enables rapid immobilization and dehydration of samples without deposition of chemical residues over the cell surface. Moreover, it enables the on-chip chemical stimulation and fixation of immobilized cells with minimum dislodgement. These advantages were demonstrated for comparing the morphological changes of non-budding and budding yeast cells following Lyticase treatment.
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39
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Ou JZ, Chrimes AF, Wang Y, Tang SY, Strano MS, Kalantar-zadeh K. Ion-driven photoluminescence modulation of quasi-two-dimensional MoS2 nanoflakes for applications in biological systems. NANO LETTERS 2014; 14:857-63. [PMID: 24397241 DOI: 10.1021/nl4042356] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Quasi-two-dimensional (quasi-2D) molybdenum disulfide (MoS2) is a photoluminescence (PL) material with unique properties. The recent demonstration of its PL, controlled by the intercalation of positive ions, can lead to many opportunities for employing this quasi-2D material in ion-related biological applications. Here, we present two representative models of biological systems that incorporate the ion-controlled PL of quasi-2D MoS2 nanoflakes. The ion exchange behaviors of these two models are investigated to reveal enzymatic activities and cell viabilities. While the ion intercalation of MoS2 in enzymatic activities is enabled via an external applied voltage, the intercalation of ions in cell viability investigations occurs in the presence of the intrinsic cell membrane potential.
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Affiliation(s)
- Jian Zhen Ou
- School of Electrical and Computer Engineering, RMIT University , Melbourne, Victoria 3001, Australia
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