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Guselnikova O, Lim H, Kim HJ, Kim SH, Gorbunova A, Eguchi M, Postnikov P, Nakanishi T, Asahi T, Na J, Yamauchi Y. New Trends in Nanoarchitectured SERS Substrates: Nanospaces, 2D Materials, and Organic Heterostructures. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107182. [PMID: 35570326 DOI: 10.1002/smll.202107182] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 03/23/2022] [Indexed: 06/15/2023]
Abstract
This article reviews recent fabrication methods for surface-enhanced Raman spectroscopy (SERS) substrates with a focus on advanced nanoarchitecture based on noble metals with special nanospaces (round tips, gaps, and porous spaces), nanolayered 2D materials, including hybridization with metallic nanostructures (NSs), and the contemporary repertoire of nanoarchitecturing with organic molecules. The use of SERS for multidisciplinary applications has been extensively investigated because the considerably enhanced signal intensity enables the detection of a very small number of molecules with molecular fingerprints. Nanoarchitecture strategies for the design of new NSs play a vital role in developing SERS substrates. In this review, recent achievements with respect to the special morphology of metallic NSs are discussed, and future directions are outlined for the development of available NSs with reproducible preparation and well-controlled nanoarchitecture. Nanolayered 2D materials are proposed for SERS applications as an alternative to the noble metals. The modern solutions to existing limitations for their applications are described together with the state-of-the-art in bio/environmental SERS sensing using 2D materials-based composites. To complement the existing toolbox of plasmonic inorganic NSs, hybridization with organic molecules is proposed to improve the stability of NSs and selectivity of SERS sensing by hybridizing with small or large organic molecules.
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Affiliation(s)
- Olga Guselnikova
- JST-ERATO Yamauchi Materials Space Tectonics Project, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
| | - Hyunsoo Lim
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
- New & Renewable Energy Research Center, Korea Electronics Technology Institute (KETI), 25, Saenari-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 13509, Republic of Korea
| | - Hyun-Jong Kim
- Surface Technology Group, Korea Institute of Industrial Technology (KITECH), Incheon, 21999, Republic of Korea
| | - Sung Hyun Kim
- New & Renewable Energy Research Center, Korea Electronics Technology Institute (KETI), 25, Saenari-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 13509, Republic of Korea
| | - Alina Gorbunova
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
| | - Miharu Eguchi
- JST-ERATO Yamauchi Materials Space Tectonics Project, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Pavel Postnikov
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
| | - Takuya Nakanishi
- Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku, Tokyo, 169-0051, Japan
| | - Toru Asahi
- Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku, Tokyo, 169-0051, Japan
| | - Jongbeom Na
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
- Research and Development (R&D) Division, Green Energy Institute, Mokpo, Jeollanamdo, 58656, Republic of Korea
| | - Yusuke Yamauchi
- JST-ERATO Yamauchi Materials Space Tectonics Project, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
- Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku, Tokyo, 169-0051, Japan
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2
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Feng N, Li C, Shen J, Hu Y, Fodjo EK, Zhang L, Chen S, Fan Q, Wang L. 1,4-Benzenedithiol-Bridged Nanogap-Based Individual Particle Surface-Enhanced Raman Spectroscopy Mechanical Probe for Revealing the Endocytic Force. ACS NANO 2022; 16:6605-6614. [PMID: 35420023 DOI: 10.1021/acsnano.2c00995] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
1,4-Benzenedithiol (BDT)-bridged core-satellite assemblies, as surface-enhanced Raman spectroscopy (SERS) mechanical probes, can be employed for real-time monitoring of the dynamics of endocytic forces and the accompanying trajectory of nanoparticles during the endocytosis process. These mechanical probes exhibit good responses in terms of SERS intensity ratios while undergoing mechanical pressure. Force tracing and the accompanying trajectory of nanoparticles are resolved accurately to render the endocytosis process in live cells. Density functional theory simulation results further proved the sensing scheme due to the electrons transforming between BDT and gold nanoparticles. Furthermore, this SERS mechanical probe is a valid method to visualize endocytic forces at multiple locations and establish a direct criterion to discriminate between cancer cells and normal cells.
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Affiliation(s)
- Ning Feng
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Chang Li
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Jingjing Shen
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Yanling Hu
- School of Electrical and Control, Nanjing Polytechnic Institute, 188 Xinle Road, Nanjing 211500, China
| | - Essy Kouadio Fodjo
- Laboratory of Constitution and Reaction of Matter, University of Felix Houphouet-Boigny, 22 BP 582 Abidjan 22, Cote d'Ivoire
| | - Lei Zhang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Shufen Chen
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Quli Fan
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Lianhui Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
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Chen R, Du X, Cui Y, Zhang X, Ge Q, Dong J, Zhao X. Vertical Flow Assay for Inflammatory Biomarkers Based on Nanofluidic Channel Array and SERS Nanotags. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002801. [PMID: 32567225 DOI: 10.1002/smll.202002801] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/03/2020] [Indexed: 05/07/2023]
Abstract
There is a great demand for the development of detection assays for inflammation infection diagnosis with high throughput and ultrasensitivity. Herein, a vertical flow assay system with functionalized nanoporous anodic aluminum oxide (AAO) as sensing membrane, and encoded core-shell surface enhanced Raman scattering (SERS) nanotags as labels for multiple inflammatory biomarkers detection is presented. A 2 × 2 test array on the porous AAO is developed and modified with multiple capture antibodies to capture inflammatory biomarkers from samples. Due to the high surface area to volume ratio of the AAO membrane, and its influence on plasmonic coupling, the electromagnetic field of the encoded core-shell SERS nanotags is enhanced. Detection limits of 53.4, 4.72, 48.3, and 7.53 fg mL-1 are realized for C reactive protein, interleukin-6, serum amyloid A, and procalcitonin, respectively, with a linear dynamic range spanning at least five orders of magnitude. In addition, the proposed method also shows acceptable accuracy and repeatability for the detection of clinical samples. Therefore, this approach is expected to be a powerful point of care testing tool for disease diagnosis in facility limited areas.
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Affiliation(s)
- Ruipeng Chen
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- National Demonstration Center for Experimental Biomedical Engineering Education, Southeast University, Nanjing, 210096, China
- Southeast University Shenzhen Research Institute, Shenzhen, 518000, China
| | - Xin Du
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
| | - Yujun Cui
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- National Demonstration Center for Experimental Biomedical Engineering Education, Southeast University, Nanjing, 210096, China
- Southeast University Shenzhen Research Institute, Shenzhen, 518000, China
| | - Xieyuan Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- National Demonstration Center for Experimental Biomedical Engineering Education, Southeast University, Nanjing, 210096, China
- Southeast University Shenzhen Research Institute, Shenzhen, 518000, China
| | - Qinyu Ge
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- National Demonstration Center for Experimental Biomedical Engineering Education, Southeast University, Nanjing, 210096, China
| | - Jian Dong
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- National Demonstration Center for Experimental Biomedical Engineering Education, Southeast University, Nanjing, 210096, China
- Southeast University Shenzhen Research Institute, Shenzhen, 518000, China
| | - Xiangwei Zhao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
- National Demonstration Center for Experimental Biomedical Engineering Education, Southeast University, Nanjing, 210096, China
- Southeast University Shenzhen Research Institute, Shenzhen, 518000, China
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Soto-Quintero A, Guarrotxena N, García O, Quijada-Garrido I. Curcumin to Promote the Synthesis of Silver NPs and their Self-Assembly with a Thermoresponsive Polymer in Core-Shell Nanohybrids. Sci Rep 2019; 9:18187. [PMID: 31796864 PMCID: PMC6890765 DOI: 10.1038/s41598-019-54752-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 11/19/2019] [Indexed: 12/11/2022] Open
Abstract
This work presents a simple one-pot protocol to achieve core-doped shell nanohybrids comprising silver nanoparticles, curcumin and thermoresponsive polymeric shell taking advantage of the reducing properties of phenolic curcumin substance and its ability to decorate metallic surfaces. Silver nanoparticles were synthesized, via sodium citrate and silver nitrate addition into a boiling aqueous solution of curcumin, monomers and surfactant. Curcumin and sodium citrate promoted silver nucleation, acting as reducing and stabilizing agents. These curcumin-capped AgNPs enabled, after adding the radical polymerization initiator, the assembling of the growing polymer chains around the hydrophobic AgNP surface. The resultant core-doped shell nanohybrids exhibit plasmonic, luminescent and volume thermoresponsive properties, with improved possibilities to be used as successful therapeutic platforms. In fact, the possibility to nanoconfine the synergistic antioxidant, antiviral, antibacterial features of silver and curcumin in one bioavailable hybrid paves the way to promising applications in the biomedical field.
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Affiliation(s)
- Albanelly Soto-Quintero
- Instituto de Ciencia y Tecnología de Polímeros. Consejo Superior de Investigaciones Científicas (ICTP-CSIC) c/Juan de la Cierva, 3 E-28006, Madrid, Spain
| | - Nekane Guarrotxena
- Instituto de Ciencia y Tecnología de Polímeros. Consejo Superior de Investigaciones Científicas (ICTP-CSIC) c/Juan de la Cierva, 3 E-28006, Madrid, Spain.
| | - Olga García
- Instituto de Ciencia y Tecnología de Polímeros. Consejo Superior de Investigaciones Científicas (ICTP-CSIC) c/Juan de la Cierva, 3 E-28006, Madrid, Spain
| | - Isabel Quijada-Garrido
- Instituto de Ciencia y Tecnología de Polímeros. Consejo Superior de Investigaciones Científicas (ICTP-CSIC) c/Juan de la Cierva, 3 E-28006, Madrid, Spain.
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5
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Chen R, Liu B, Ni H, Chang N, Luan C, Ge Q, Dong J, Zhao X. Vertical flow assays based on core–shell SERS nanotags for multiplex prostate cancer biomarker detection. Analyst 2019; 144:4051-4059. [DOI: 10.1039/c9an00733d] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A core–shell SERS nanotag based VFA with a single test spot for multiplex biomarker detection at pg mL−1 level with a wide LDR.
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Affiliation(s)
- Ruipeng Chen
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- China
| | - Bing Liu
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- China
| | - Haibin Ni
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- China
| | - Ning Chang
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- China
| | - Chengxin Luan
- Department of Hematology and Oncology (Key Department of Jiangsu Medicine)
- Zhongda Hospital
- School of Medicine Southeast University
- Nanjing 210009
- China
| | - Qinyu Ge
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- China
| | - Jian Dong
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- China
| | - Xiangwei Zhao
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- China
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6
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Li L, Hutter T, Li W, Mahajan S. Single Nanoparticle-Based Heteronanojunction as a Plasmon Ruler for Measuring Dielectric Thin Films. J Phys Chem Lett 2015; 6:2282-2286. [PMID: 26266605 DOI: 10.1021/acs.jpclett.5b00806] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nondestructive, noninvasive and accurate measurement of thin film thicknesses on dielectric substrates is challenging. In this work a ruler for measuring thin film thicknesses utilizes the heteronanojunction construct formed between a plasmonic nanoparticle and a high refractive index nonplasmonic substrate. The high near-field sensitivity in the nanojunction renders it suitable for measuring the thickness of intervening dielectric thin films. We demonstrate this by controlling the thickness of dielectric spacer layers created by overgrowing SiO2 thin films on commercially available silicon substrates. While Rayleigh (using dark-field) scattering measurements show that the spectral response is well correlated to the thickness of SiO2 spacer layers the distance-dependence is much steeper with surface-enhanced Raman scattering (SERS). Good agreement between 3D simulations and experimental results confirm the plasmon ruler construct's sensitivity to the dielectric thin film spacing. Thus, we postulate that this single nanoparticle based heteronanojunction configuration can serve as a convenient and simple ruler in metrology of thin films as well as a platform for SERS-based detection even in cases where plasmonically active films are not a suitable substrate.
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Affiliation(s)
- Li Li
- †School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
- ‡Institute for Life Sciences and Department of Chemistry, Highfield Campus, University of Southampton, Southampton SO17 1BJ, U.K
| | - Tanya Hutter
- §Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Wenwu Li
- ∥Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Sumeet Mahajan
- ‡Institute for Life Sciences and Department of Chemistry, Highfield Campus, University of Southampton, Southampton SO17 1BJ, U.K
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7
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Pallaoro A, Hoonejani MR, Braun GB, Meinhart CD, Moskovits M. Rapid identification by surface-enhanced Raman spectroscopy of cancer cells at low concentrations flowing in a microfluidic channel. ACS NANO 2015; 9:4328-36. [PMID: 25781324 DOI: 10.1021/acsnano.5b00750] [Citation(s) in RCA: 128] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Reliable identification and collection of cells from bodily fluids is of growing interest for monitoring patient response to therapy and for early detection of disease or its recurrence. We describe a detection platform that combines microfluidics with surface-enhanced Raman spectroscopy (SERS) for the identification of individual mammalian cells continuously flowing in a microfluidics channel. A mixture of cancerous and noncancerous prostate cells was incubated with SERS biotags (SBTs) developed and synthesized by us, then injected into a flow-focused microfluidic channel, which forces the cells into a single file. The spectrally rich SBTs are based on a silver nanoparticle dimer core labeled with a Raman-active small reporter molecule paired with an affinity biomolecule, providing a unique barcode whose presence in a composite SERS spectrum can be deconvoluted. Individual cancer cells passing through the focused laser beam were correctly identified among a proportionally larger number of other cells by their Raman signatures. We examine two deconvolution strategies: principal component analysis and classical least-squares. The deconvolution strategies are used to unmix the overall spectrum to determine the relative contributions between two SBT barcodes, where one SBT barcode indicates neuropilin-1 overexpression, while a second SBT barcode is more universal and indicates unspecific binding to a cell's membrane. Highly reliable results were obtained for all of the cell mixture ratios tested, the lowest being 1 in 100 cells.
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Affiliation(s)
| | | | - Gary B Braun
- §Cancer Research Center, Sanford-Burnham Medical Research Institute, 10901 N. Torrey Pines Road, La Jolla, California 92037, United States
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8
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Guarrotxena N, Bazan GC. Antitags: SERS-encoded nanoparticle assemblies that enable single-spot multiplex protein detection. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:1941-1946. [PMID: 24338905 DOI: 10.1002/adma.201304107] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Revised: 11/04/2013] [Indexed: 06/03/2023]
Abstract
Simultaneous detection of multiple proteins on a single spot can be efficiently achieved by using multiplexed surface-enhanced Raman spectroscopy (SERS)-encoded nanoparticle 'antitags' consisting of poly(ethylene glycol) (PEG)-protected silver dimers (and higher aggregates) and antibody-tagging entities. The effective SERS-based multivariate deconvolution approach guarantees an accurate and successful distinguishable identification of single and multiple proteins in complex samples. Their potential application in multiplexed SERS bioimaging technology can be easily envisaged.
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Affiliation(s)
- Nekane Guarrotxena
- Instituto de Ciencia y Tecnología de Polímeros (ICTP), Consejo Superior de Investigaciones Científicas (CSIC), Juan de la Cierva 3, Madrid, 28006, Spain
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9
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Cheng YF, Yu GP, Yan Y, Liu JY, Ye C, Yu X, Lai XD, Hu JQ. A simple and effective strategy for the directed and high-yield assembly of large-sized gold nanoparticles driven by bithiol-modified complementary dsDNA architectures. RSC Adv 2014. [DOI: 10.1039/c4ra04617j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple strategy for the high-yield assembly of large-sized Au NPs has been demonstrated by bithiol-modified complementary dsDNA architectures, which obviate the traditional conjugate of Au NPs to long ssDNA.
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Affiliation(s)
- Yan-Fang Cheng
- Key Lab of Fuel Cell Technology of Guangdong Province
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640, China
| | - Gui-Ping Yu
- Key Lab of Fuel Cell Technology of Guangdong Province
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640, China
| | - Yuan Yan
- Key Lab of Fuel Cell Technology of Guangdong Province
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640, China
| | - Jian-Yu Liu
- Key Lab of Fuel Cell Technology of Guangdong Province
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640, China
| | - Cui Ye
- Key Lab of Fuel Cell Technology of Guangdong Province
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640, China
| | - Xiang Yu
- Analytical and Testing Center
- Jinan University
- Guangzhou 510632, China
| | - Xuan-Di Lai
- Key Lab of Fuel Cell Technology of Guangdong Province
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640, China
| | - Jian-Qiang Hu
- Key Lab of Fuel Cell Technology of Guangdong Province
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640, China
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10
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Li L, Hutter T, Steiner U, Mahajan S. Single molecule SERS and detection of biomolecules with a single gold nanoparticle on a mirror junction. Analyst 2013; 138:4574-8. [PMID: 23748709 DOI: 10.1039/c3an00447c] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Using the bianalyte method we unambiguously demonstrate that a single gold nanosphere on a metal film junction, in the so-called nanoparticle on a mirror configuration, is capable of single molecule detection with surface-enhanced Raman spectroscopy (SERS). Also this configuration serves as a convenient and highly sensitive SERS sensor for detection of biomolecules. Such simple nano-junction based systems are ideal for chemical and biomedical analysis.
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Affiliation(s)
- Li Li
- Institute for Life Sciences, Highfield Campus, University of Southampton, SO17 1BJ, UK
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11
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El-Khoury PZ, Hu D, Apkarian VA, Hess WP. Raman scattering at plasmonic junctions shorted by conductive molecular bridges. NANO LETTERS 2013; 13:1858-61. [PMID: 23534898 DOI: 10.1021/nl400733r] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Intensity spikes in Raman scattering, accompanied by switching between line spectra and band spectra, can be assigned to shorting the junction plasmon through molecular conductive bridges. This is demonstrated through Raman trajectories recorded at a plasmonic junction formed by a gold AFM tip in contact with a silver surface coated either with biphenyl-4,4'-dithiol or biphenyl-4-thiol. The fluctuations are absent in the monothiol. In effect, the making and breaking of chemical bonds is tracked.
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Affiliation(s)
- Patrick Z El-Khoury
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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12
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Banik M, Apkarian VA, Park TH, Galperin M. Raman Staircase in Charge Transfer SERS at the Junction of Fusing Nanospheres. J Phys Chem Lett 2013; 4:88-92. [PMID: 26291217 DOI: 10.1021/jz3018072] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We present a theoretical analysis of Raman intensities for a molecule that bridges a current carrying junction. Experimental data is used to estimate parameters for the theoretical model. The recently reported staircase of Raman intensities observed during the fusion of nanodumbbell is reproduced.
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Affiliation(s)
- M Banik
- †Department of Chemistry, University of California, Irvine, California 92697, United States
| | - V A Apkarian
- †Department of Chemistry, University of California, Irvine, California 92697, United States
| | - T-H Park
- ‡Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
| | - M Galperin
- ‡Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
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13
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Affiliation(s)
- Yunqing Wang
- Key Laboratory of Coastal Zone
Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
| | - Bing Yan
- School of Chemistry and Chemical
Engineering, Shandong University, Jinan
250100, China
| | - Lingxin Chen
- Key Laboratory of Coastal Zone
Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
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14
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Jokerst JV, Cole AJ, Van de Sompel D, Gambhir SS. Gold nanorods for ovarian cancer detection with photoacoustic imaging and resection guidance via Raman imaging in living mice. ACS NANO 2012; 6:10366-77. [PMID: 23101432 PMCID: PMC3572720 DOI: 10.1021/nn304347g] [Citation(s) in RCA: 271] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Improved imaging approaches are needed for ovarian cancer screening, diagnosis, staging, and resection guidance. Here, we propose a combined photoacoustic (PA)/Raman approach using gold nanorods (GNRs) as a passively targeted molecular imaging agent. GNRs with three different aspect ratios were studied. Those with an aspect ratio of 3.5 were selected for their highest ex vivo and in vivo PA signal and used to image subcutaneous xenografts of the 2008, HEY, and SKOV3 ovarian cancer cell lines in living mice. Maximum PA signal was observed within 3 h for all three lines tested and increased signal persisted for at least two days postadministration. There was a linear relationship (R(2) = 0.95) between the PA signal and the concentration of injected molecular imaging agent with a calculated limit of detection of 0.40 nM GNRs in the 2008 cell line. The same molecular imaging agent could be used for clear visualization of the margin between tumor and normal tissue and tumor debulking via surface-enhanced Raman spectroscopy (SERS) imaging. Finally, we validated the imaging findings with biodistribution data and elemental analysis. To the best of our knowledge, this is the first report of in vivo imaging of ovarian cancer tumors with a photoacoustic and Raman imaging agent.
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Affiliation(s)
- Jesse V. Jokerst
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University, 318 Campus Drive, Stanford, California 94305-5427, United States
| | - Adam J. Cole
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University, 318 Campus Drive, Stanford, California 94305-5427, United States
| | - Dominique Van de Sompel
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University, 318 Campus Drive, Stanford, California 94305-5427, United States
| | - Sanjiv S. Gambhir
- Molecular Imaging Program at Stanford (MIPS), Department of Radiology, Stanford University, 318 Campus Drive, Stanford, California 94305-5427, United States
- Bioengineering, Materials Science & Engineering, Bio-X, Stanford University, Stanford, California 94305, United States
- Address correspondence to
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Banik M, El-Khoury PZ, Nag A, Rodriguez-Perez A, Guarrottxena N, Bazan GC, Apkarian VA. Surface-enhanced Raman trajectories on a nano-dumbbell: transition from field to charge transfer plasmons as the spheres fuse. ACS NANO 2012; 6:10343-54. [PMID: 23092179 DOI: 10.1021/nn304277n] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
By taking advantage of the tensor nature of surface-enhanced Raman scattering (SERS), we track trajectories of the linker molecule and a CO molecule chemisorbed at the hot spot of a nano-dumbbell consisting of dibenzyldithio-linked silver nanospheres. The linear Stark shift of CO serves as an absolute gauge of the local field, while the polyatomic spectra characterize the vector components of the local field. We identify surface-enhanced Raman optical activity due to a transient asperity in the nanojunction in an otherwise uneventful SERS trajectory. During fusion of the spheres, we observe sequential evolution of the enhanced spectra from dipole-coupled Raman to quadrupole- and magnetic dipole-coupled Raman, followed by a transition from line spectra to band spectra, and the full reversal of the sequence. From the spectrum of CO, the sequence can be understood to track the evolution of the junction plasmon resonance from dipolar to quadrupolar to charge transfer as a function of intersphere separation, which evolves at a speed of ∼1 Å/min. The crossover to the conduction limit is marked by the transition of line spectra to Stark-broadened and shifted band spectra. As the junction closes on CO, the local field reaches 1 V/Å, limited to a current of 1 electron per vibrational cycle passing through the molecule, with associated Raman enhancement factor via the charge transfer plasmon resonance of 10(12). The local field identifies that a sharp protrusion is responsible for room-temperature chemisorption of CO on silver. The asymmetric phototunneling junction, Ag-CO-Ag, driven by the frequency-tunable charge transfer plasmon of the dumbbell antenna, combines the design elements of an ideal rectifying photocollector.
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Affiliation(s)
- Mayukh Banik
- Department of Chemistry, University of California, Irvine, California 92697, United States
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Li L, Hutter T, Finnemore AS, Huang FM, Baumberg JJ, Elliott SR, Steiner U, Mahajan S. Metal oxide nanoparticle mediated enhanced Raman scattering and its use in direct monitoring of interfacial chemical reactions. NANO LETTERS 2012; 12:4242-6. [PMID: 22765890 DOI: 10.1021/nl302029p] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Metal oxide nanoparticles (MONPs) have widespread usage across many disciplines, but monitoring molecular processes at their surfaces in situ has not been possible. Here we demonstrate that MONPs give highly enhanced (×10(4)) Raman scattering signals from molecules at the interface permitting direct monitoring of their reactions, when placed on top of flat metallic surfaces. Experiments with different metal oxide materials and molecules indicate that the enhancement is generic and operates at the single nanoparticle level. Simulations confirm that the amplification is principally electromagnetic and is a result of optical modulation of the underlying plasmonic metallic surface by MONPs, which act as scattering antennae and couple light into the confined region sandwiched by the underlying surface. Because of additional functionalities of metal oxides as magnetic, photoelectrochemical and catalytic materials, enhanced Raman scattering mediated by MONPs opens up significant opportunities in fundamental science, allowing direct tracking and understanding of application-specific transformations at such interfaces. We show a first example by monitoring the MONP-assisted photocatalytic decomposition reaction of an organic dye by individual nanoparticles.
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Affiliation(s)
- Li Li
- Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK
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Quantitative ratiometric discrimination between noncancerous and cancerous prostate cells based on neuropilin-1 overexpression. Proc Natl Acad Sci U S A 2011; 108:16559-64. [PMID: 21930955 DOI: 10.1073/pnas.1109490108] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A multiplexed, ratiometric method is described that can confidently distinguish between cancerous and noncancerous epithelial prostate cells in vitro. The technique is based on bright surface-enhanced resonance Raman scattering (SERRS) biotags (SBTs) infused with unique Raman reporter molecules, and carrying cell-specific peptides. Two sets of SBTs were used. One targets the neuropilin-1 (NRP-1) receptors of cancer cells through the RPARPAR peptide. The other functions as a positive control (PC) and binds to both noncancerous and cancer cells through the HIV-derived TAT peptide. Point-by-point 2D Raman maps of the spatial distribution of the two tags were constructed with subcellular resolution from cells simultaneously incubated with the two sets of SBTs. Averaging the SERRS signal over a given cell yielded an NRP/PC ratio from which a robust quantitative measure of the overexpression of the NRP-1 by the cancer cell line was extracted. The use of a local, on-cell reference produces quantitative, statistically robust measures of overexpression independent of such sources of uncertainty as variations in the location of the focal plane, the local cell concentration, and turbidity.
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