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Zhu W, Cai E, Li H, Wang P, Shen A, Popp J, Hu J. Precise Encoding of Triple‐Bond Raman Scattering of Single Polymer Nanoparticles for Multiplexed Imaging Application. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wei Zhu
- College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 P. R. China
| | - Er‐Li Cai
- Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430079 P. R. China
| | - Hao‐Zheng Li
- Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430079 P. R. China
| | - Ping Wang
- Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430079 P. R. China
| | - Ai‐Guo Shen
- College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 P. R. China
- School of Printing and Packaging Wuhan University Wuhan 430072 P. R. China
| | - Jürgen Popp
- Institute of Physical Chemistry and Abbe Center of Photonics Friedrich Schiller University Jena Helmholtzweg 4 07743 Jena Germany
- Leibniz Institute for Photonic Technology Albert-Einstein-Strasse 9 07745 Jena Germany
| | - Ji‐Ming Hu
- College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 P. R. China
- Center of Analysis and Testing Wuhan University Wuhan 430074 P. R. China
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2
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Zhu W, Cai EL, Li HZ, Wang P, Shen AG, Popp J, Hu JM. Precise Encoding of Triple-Bond Raman Scattering of Single Polymer Nanoparticles for Multiplexed Imaging Application. Angew Chem Int Ed Engl 2021; 60:21846-21852. [PMID: 34227191 DOI: 10.1002/anie.202106136] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/27/2021] [Indexed: 11/08/2022]
Abstract
Stimulated Raman scattering (SRS) microscopy in combination with innovative tagging strategies offers great potential as a universal high-throughput biomedical imaging tool. Here, we report rationally tailored small molecular monomers containing triple-bond units with large Raman scattering cross-sections, which can be polymerized at the nanoscale for enhancement of SRS contrast with smaller but brighter optical nanotags with artificial fingerprint output. From this, a class of triple-bond rich polymer nanoparticles (NPs) was engineered by regulating the relative dosages of three chemically different triple-bond monomers in co-polymerization. The bonding strategy allowed for 15 spectrally distinguishable triple-bond combinations. These accurately structured nano molecular aggregates, rather than long-chain macromolecules, could establish a universal method for generating small-sized biological SRS imaging tags with high sensitivity for high-throughput multi-color biomedical imaging.
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Affiliation(s)
- Wei Zhu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - Er-Li Cai
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430079, P. R. China
| | - Hao-Zheng Li
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430079, P. R. China
| | - Ping Wang
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430079, P. R. China
| | - Ai-Guo Shen
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China.,School of Printing and Packaging, Wuhan University, Wuhan, 430072, P. R. China
| | - Jürgen Popp
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743, Jena, Germany.,Leibniz Institute for Photonic Technology, Albert-Einstein-Strasse 9, 07745, Jena, Germany
| | - Ji-Ming Hu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China.,Center of Analysis and Testing, Wuhan University, Wuhan, 430074, P. R. China
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3
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Lin D, Gong T, Qiu S, Wu Q, Tseng CY, Kong KV, Chen G, Chen R. A dual signal amplification nanosensor based on SERS technology for detection of tumor-related DNA. Chem Commun (Camb) 2019; 55:1548-1551. [PMID: 30534756 DOI: 10.1039/c8cc07461e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A dual signal amplification method based on surface-enhanced Raman scattering (SERS) is developed by photo-triggered release of SERS probes from mesoporous silica-coated Au nanorods (SiO2@Au) and the use of a specially-designed SERS substrate with an internal reference. Two metal carbonyl (metal-CO) labels (Os-SCO and Re-SCO) are proposed here as novel interference-free labels. Results demonstrate that tumor-related DNA can be quantitatively detected by this reliable and ultra-sensitive SERS platform.
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Affiliation(s)
- Duo Lin
- College of Integrated Traditional Chinese and Western Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China
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4
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Li S, Chen T, Wang Y, Liu L, Lv F, Li Z, Huang Y, Schanze KS, Wang S. Conjugated Polymer with Intrinsic Alkyne Units for Synergistically Enhanced Raman Imaging in Living Cells. Angew Chem Int Ed Engl 2017; 56:13455-13458. [DOI: 10.1002/anie.201707042] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Indexed: 01/22/2023]
Affiliation(s)
- Shengliang Li
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Tao Chen
- Biodynamic Optical Imaging Center; College of Engineering; Peking University; Beijing 100871 P. R. China
| | - Yunxia Wang
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Libing Liu
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Fengting Lv
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Zhiliang Li
- Department of Chemistry; University of Texas at San Antonio; San Antonio TX 78249 USA
| | - Yanyi Huang
- Biodynamic Optical Imaging Center; College of Engineering; Peking University; Beijing 100871 P. R. China
| | - Kirk S. Schanze
- Department of Chemistry; University of Texas at San Antonio; San Antonio TX 78249 USA
| | - Shu Wang
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
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5
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Li S, Chen T, Wang Y, Liu L, Lv F, Li Z, Huang Y, Schanze KS, Wang S. Conjugated Polymer with Intrinsic Alkyne Units for Synergistically Enhanced Raman Imaging in Living Cells. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707042] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Shengliang Li
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Tao Chen
- Biodynamic Optical Imaging Center; College of Engineering; Peking University; Beijing 100871 P. R. China
| | - Yunxia Wang
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Libing Liu
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Fengting Lv
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Zhiliang Li
- Department of Chemistry; University of Texas at San Antonio; San Antonio TX 78249 USA
| | - Yanyi Huang
- Biodynamic Optical Imaging Center; College of Engineering; Peking University; Beijing 100871 P. R. China
| | - Kirk S. Schanze
- Department of Chemistry; University of Texas at San Antonio; San Antonio TX 78249 USA
| | - Shu Wang
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
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6
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Bag A, Ghorai PK. Enhancement of biocompatibility and photoacoustic contrast activity of metal clusters. J Mol Graph Model 2017; 75:220-232. [PMID: 28601707 DOI: 10.1016/j.jmgm.2017.05.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 05/12/2017] [Accepted: 05/16/2017] [Indexed: 01/23/2023]
Abstract
Organometallic carbonyl clusters (OMCC) of group VIII elements are water soluble, bio-compatible and stable high-contrast photoacoustic agents for live cell imaging. But, they have limited application due to weak absorption within 700-1000nm wavelength which is known as the biological window of absorption. In this article, we report that hexa-nuclear iron (Fe6) carbonyl cluster derivatized with sodium thio-propanoate has very good absorption within 700-1600nm wave length. This modeled compound is water soluble and bio-compatible. The bio-compatibility of this compound is tested through cytotoxicity, LogP and metabolic probability at CYP450-2D6 enzyme.
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Affiliation(s)
- Arijit Bag
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741246, WB, India
| | - Pradip Kr Ghorai
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741246, WB, India.
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7
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Li Z, Du Z, Sun K, He X, Chen B. Controllable fabrication of Ag-nanoplate-decorated PAN-nanopillar arrays and their application in surface-enhanced Raman scattering. RSC Adv 2017. [DOI: 10.1039/c7ra11102a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This article demonstrates a controllable and low-cost fabrication approach to large-scale flexible films with one side consisting of ordered and vertically aligned Ag-nanoplates assembled PAN-nanopillar arrays with high-density and uniform hot spots.
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Affiliation(s)
- Zhongbo Li
- College of Light-Textile Engineering and Art
- Anhui Agricultural University
- Hefei 230036
- China
- Key Laboratory of Materials Physics
| | - Zhaofang Du
- College of Light-Textile Engineering and Art
- Anhui Agricultural University
- Hefei 230036
- China
| | - Kexi Sun
- College of Physics and Electronic Information
- Luoyang Normal University
- Luoyang 471022
- China
| | - Xuan He
- Institute of Chemical Materials
- China Academy of Engineering Physics
- Mianyang 621900
- China
| | - Bensong Chen
- Key Laboratory of Materials Physics
- Key Laboratory of Nanomaterials and Nanotechnology
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
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8
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Roy CN, Ghosh D, Mondal S, Kundu S, Maiti S, Saha A. SERS Enhancement on the Basis of Temperature-Dependent Chemisorption: Microcalorimetric Evidence. Chemphyschem 2016; 17:4144-4148. [DOI: 10.1002/cphc.201600941] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Chandra Nath Roy
- Chemistry Division; UGC-DAE Consortium for Scientific Research, Kolkata Centre; Kolkata 700098 India), Fax: (+91) 33-23357008
| | - Debasmita Ghosh
- Chemistry Division; UGC-DAE Consortium for Scientific Research, Kolkata Centre; Kolkata 700098 India), Fax: (+91) 33-23357008
| | - Somrita Mondal
- Chemistry Division; UGC-DAE Consortium for Scientific Research, Kolkata Centre; Kolkata 700098 India), Fax: (+91) 33-23357008
| | - Somashree Kundu
- Chemistry Division; UGC-DAE Consortium for Scientific Research, Kolkata Centre; Kolkata 700098 India), Fax: (+91) 33-23357008
| | - Susmita Maiti
- Chemistry Division; UGC-DAE Consortium for Scientific Research, Kolkata Centre; Kolkata 700098 India), Fax: (+91) 33-23357008
| | - Abhijit Saha
- Chemistry Division; UGC-DAE Consortium for Scientific Research, Kolkata Centre; Kolkata 700098 India), Fax: (+91) 33-23357008
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9
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Substitution of Metallocenes with [2.2]Paracyclophane to Enable Confocal Microscopy Imaging in Living Cells. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600281] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Murshid N, Wang X. Iron-Carbonyl Aqueous Vesicles (MCsomes) by Hydration of [Fe(CO){CO(CH2)5CH3}(Cp)(PPh3)] (FpC6): Highly Integrated Colloids with Aggregation-Induced Self-Enhanced IR Absorption (AI-SEIRA). Chemistry 2015; 21:19223-30. [PMID: 26563745 DOI: 10.1002/chem.201502121] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Indexed: 11/11/2022]
Abstract
Self-assembly of hydrophobic molecules into aqueous colloids contradicts common chemical intuition, but has been achieved through hydration of [Fe(CO){CO(CH2)5CH3}(Cp)(PPh3)] (FpC6). FpC6 has no surface activity, no NMR signals in D2O and no critical aggregation concentration (CAC) in H2O. The molecule, however, contains both acyl and terminal CO groups that are prone to being hydrated. By adding water to a solution in THF, self-assembly of FpC6 can be initiated through water-carbonyl interactions (WCIs) with the highly polarized acyl CO groups. This aggregation subsequently enhances the hydration of the acyl CO groups and also induces the WCI of otherwise unhydrated terminal CO groups. The resultant metal-carbonyl aggregates have been proved to be bilayer vesicles with iron complexes exposed towards water and alkyl chains forming inner walls (MCsomes). These MCsomes show high structure integration upon dilution due to the hydrophobic nature of the building blocks. The highly polarized CO groups on the surface of the MCsomes result in a negative zeta potential (-65 mV) and create a local electric field, which significantly enhances the IR absorption of CO groups by more than 100-fold. This is the first discovery of aggregation-induced self-enhanced IR absorption (AI-SRIRA) without the assistant of external dielectric substrates. Highly integrated MCsomes are, therefore, promising as a novel group of materials, for example, for IR-based sensing and imaging.
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Affiliation(s)
- Nimer Murshid
- Department of Chemistry and Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue west, Waterloo, Ontario, N2L 3G1 (Canada)
| | - Xiaosong Wang
- Department of Chemistry and Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue west, Waterloo, Ontario, N2L 3G1 (Canada).
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11
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Li DW, Qu LL, Hu K, Long YT, Tian H. Monitoring of Endogenous Hydrogen Sulfide in Living Cells Using Surface-Enhanced Raman Scattering. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Li DW, Qu LL, Hu K, Long YT, Tian H. Monitoring of Endogenous Hydrogen Sulfide in Living Cells Using Surface-Enhanced Raman Scattering. Angew Chem Int Ed Engl 2015; 54:12758-61. [DOI: 10.1002/anie.201505025] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 08/07/2015] [Indexed: 11/08/2022]
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13
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Yang T, Guo X, Wang H, Fu S, wen Y, Yang H. Magnetically optimized SERS assay for rapid detection of trace drug-related biomarkers in saliva and fingerprints. Biosens Bioelectron 2015; 68:350-357. [DOI: 10.1016/j.bios.2015.01.021] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 12/24/2014] [Accepted: 01/09/2015] [Indexed: 01/08/2023]
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14
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Clède S, Policar C. Metal-carbonyl units for vibrational and luminescence imaging: towards multimodality. Chemistry 2014; 21:942-58. [PMID: 25376740 DOI: 10.1002/chem.201404600] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Metal-carbonyl complexes are attractive structures for bio-imaging. In addition to unique vibrational properties due to the CO moieties enabling IR and Raman cell imaging, the appropriate choice of ancillary ligands opens up the opportunity for luminescence detection. Through a classification by techniques, past and recent developments in the application of metal-carbonyl complexes for vibrational and luminescence bio-imaging are reviewed. Finally, their potential as bimodal IR and luminescent probes is addressed.
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Affiliation(s)
- Sylvain Clède
- Ecole Normale Supérieure, PSL Research University, Département de Chimie, Sorbonne Universités-UPMC Univ Paris 06, CNRS-ENS-UPMC, Laboratoire des Biomolécules, UMR7203, 24, rue Lhomond, 75005 Paris (France), Fax: (+33) 1-4432-3389
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15
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Wong CL, Dinish US, Schmidt MS, Olivo M. Non-labeling multiplex surface enhanced Raman scattering (SERS) detection of volatile organic compounds (VOCs). Anal Chim Acta 2014; 844:54-60. [PMID: 25172816 DOI: 10.1016/j.aca.2014.06.043] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 06/17/2014] [Accepted: 06/24/2014] [Indexed: 11/24/2022]
Abstract
In this paper, we report multiplex SERS based VOCs detection with a leaning nano-pillar substrate. The VOCs analyte molecules adsorbed at the tips of the nano-pillars produced SERS signal due to the field enhancement occurring at the localized surface plasmon hot spots between adjacent leaning nano-pillars. In this experiment, detections of acetone and ethanol vapor at different concentrations were demonstrated. The detection limits were found to be 0.0017 ng and 0.0037 ng for ethanol and acetone vapor molecules respectively. Our approach is a non-labeling method such that it does not require the incorporation of any chemical sensing layer for the enrichment of gas molecules on sensor surface. The leaning nano-pillar substrate also showed highly reproducible SERS signal in cyclic VOCs detection, which can reduce the detection cost in practical applications. Further, multiplex SERS detection on different combination of acetone and ethanol vapor was also successfully demonstrated. The vibrational fingerprints of molecular structures provide specific Raman peaks for different VOCs contents. To the best of our knowledge, this is the first multiplex VOCs detection using SERS. We believe that this work may lead to a portable device for multiplex, specific and highly sensitive detection of complex VOCs samples that can find potential applications in exhaled breath analysis, hazardous gas analysis, homeland security and environmental monitoring.
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Affiliation(s)
- Chi Lok Wong
- Bio-optical Imaging Group, Singapore Bioimaging Consortium, Helios #01-02, 11 Biopolis Way, Singapore
| | - U S Dinish
- Bio-optical Imaging Group, Singapore Bioimaging Consortium, Helios #01-02, 11 Biopolis Way, Singapore
| | - Michael Stenbæk Schmidt
- Department of Micro and Nanotechnology, Technical University of Denmark Ørsteds Plads, Building 345 East, DK-2800 Kongens Lyngby, Denmark
| | - Malini Olivo
- Bio-optical Imaging Group, Singapore Bioimaging Consortium, Helios #01-02, 11 Biopolis Way, Singapore; School of Physics, National University of Ireland, Galway, County Galway, Ireland.
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16
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Clède S, Lambert F, Saint-Fort R, Plamont MA, Bertrand H, Vessières A, Policar C. Influence of the Side-Chain Length on the Cellular Uptake and the Cytotoxicity of Rhenium Triscarbonyl Derivatives: A Bimodal Infrared and Luminescence Quantitative Study. Chemistry 2014; 20:8714-22. [DOI: 10.1002/chem.201402471] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Indexed: 12/11/2022]
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17
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Seo SH, Kim BM, Joe A, Han HW, Chen X, Cheng Z, Jang ES. NIR-light-induced surface-enhanced Raman scattering for detection and photothermal/photodynamic therapy of cancer cells using methylene blue-embedded gold nanorod@SiO2 nanocomposites. Biomaterials 2014; 35:3309-18. [PMID: 24424205 PMCID: PMC4576838 DOI: 10.1016/j.biomaterials.2013.12.066] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 12/20/2013] [Indexed: 01/10/2023]
Abstract
Methylene blue-loaded gold nanorod@SiO2 (MB-GNR@SiO2) core@shell nanoparticles are synthesized for use in cancer imaging and photothermal/photodynamic dual therapy. For the preparation of GNR@SiO2 nanoparticles, we found that the silica coating rate of hexadecylcetyltrimethylammonium bromide (CTAB)-capped GNRs is much slower than that of PEGylated GNRs due to the densely coated CTAB bilayer. Encapsulated MB molecules have both monomer and dimer forms that result in an increase in the photosensitizing effect through different photochemical pathways. As a consequence of the excellent plasmonic properties of GNRs at near-infrared (NIR) light, the embedded MB molecules showed NIR light-induced SERS performance with a Raman enhancement factor of 3.0 × 10(10), which is enough for the detection of a single cancer cell. Moreover, the MB-GNR@SiO2 nanoparticles exhibit a synergistic effect of photodynamic and photothermal therapies of cancer under single-wavelength NIR laser irradiation.
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Affiliation(s)
- Sun-Hwa Seo
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gyeongbuk 730-701, Republic of Korea
| | - Bo-Mi Kim
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gyeongbuk 730-701, Republic of Korea
| | - Ara Joe
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gyeongbuk 730-701, Republic of Korea
| | - Hyo-Won Han
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gyeongbuk 730-701, Republic of Korea
| | - Xiaoyuan Chen
- National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD 20892, USA
| | - Zhen Cheng
- Molecular Imaging Program at Stanford (MIPS) and Bio-X Program, Department of Radiology, Stanford University, 1201 Welch Rd, Stanford, CA 94305, USA
| | - Eue-Soon Jang
- Department of Applied Chemistry, Kumoh National Institute of Technology, Gyeongbuk 730-701, Republic of Korea.
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