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Li L, Deng S, Wang H, Zhang R, Zhu K, Lu Y, Wang Z, Zong S, Wang Z, Cui Y. A SERS fiber probe fabricated by layer-by-layer assembly of silver sphere nanoparticles and nanorods with a greatly enhanced sensitivity for remote sensing. NANOTECHNOLOGY 2019; 30:255503. [PMID: 30840944 DOI: 10.1088/1361-6528/ab0d2b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Remote sensing remains a challenge due to its demand for high sensitivity, convenient sampling and rapid response time. Surface enhanced Raman scattering (SERS) spectroscopy is a powerful analytical method for the detection of various samples. Here, aiming at increasing the sensitivity, a novel strategy for the preparation of a SERS probe is demonstrated by using hollow optical fiber tips decorated by layer-by-layer assembly of two kinds of nanoparticles. Specifically, Au@Ag core-shell nanorods and Ag nanospheres with opposite surface charge were assembled layer-by-layer on the tip of hollow optical fibers through electrostatic interaction. Then, much more hotspots are generated due to the close gap between the nanorods and nanospheres in the resultant 3D structure, which can lead to a dramatically enhanced SERS activity of the probe compared with that fabricated by pure silver sphere nanoparticles or nanorods. On the other hand, taking the advantages of the vibration spectroscopic fingerprints property of SERS spectra and the long-distance communication capacity of optical fibers, the remote online detection of biological species including proteins, funguses and cells can be easily achieved within a few minutes. Therefore, such a novel kind of optical fiber-SERS sensor holds great potential for the rapid detection of a wide range of samples due to its superiority of simplicity and high sensitivity.
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Affiliation(s)
- Lang Li
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, Jiangsu, 210096, People's Republic of China
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52
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Tian Y, Wang H, Yan L, Zhang X, Falak A, Guo Y, Chen P, Dong F, Sun L, Chu W. A Generalized Methodology of Designing 3D SERS Probes with Superior Detection Limit and Uniformity by Maximizing Multiple Coupling Effects. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900177. [PMID: 31179223 PMCID: PMC6548962 DOI: 10.1002/advs.201900177] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/24/2019] [Indexed: 05/27/2023]
Abstract
Accurate design of high-performance 3D surface-enhanced Raman scattering (SERS) probes is the desired target, which is possibly implemented with a prerequisite of quantifying formidable multiple coupling effects involved. Herein, by combining theory and experiments on 3D periodic Au/SiO2 nanogrid models, a generalized methodology of accurately designing high performance 3D SERS probes is developed. Structural symmetry, dimensions, Au roughness, and polarization are successfully correlated quantitatively to intrinsic localized electromagnetic field (EMF) enhancements by calculating surface plasmon polariton (SPP), localized surface plasmon resonance (LSPR), optical standing wave effects, and their couplings theoretically, which is experimentally verified. The hexagonal SERS probes optimized by this methodology realize over two orders of magnitudes (405 times) improvement of detection limit for Rhodamine 6G model molecules (2.17 × 10-11 m) compared to the unoptimized probes with the same number density of hot spots, an enhancement factor of 3.4 × 108, a uniformity of 5.52%, and are successfully applied to the detection of 5 × 10-11 m Hg ions in water. This unambiguously results from the Au roughness-independent extra 144% contribution of LSPR effects excited by SPP interference waves as secondary sources, which is very unusual to be beyond the conventional recognition.
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Affiliation(s)
- Yi Tian
- Nanofabrication LaboratoryCAS Key Laboratory for Nanosystems and Hierachical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P. R. China
| | - Hanfu Wang
- Nanofabrication LaboratoryCAS Key Laboratory for Nanosystems and Hierachical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P. R. China
| | - Lanqin Yan
- Nanofabrication LaboratoryCAS Key Laboratory for Nanosystems and Hierachical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P. R. China
| | - Xianfeng Zhang
- Nanofabrication LaboratoryCAS Key Laboratory for Nanosystems and Hierachical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P. R. China
| | - Attia Falak
- Nanofabrication LaboratoryCAS Key Laboratory for Nanosystems and Hierachical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P. R. China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049P. R. China
| | - Yanjun Guo
- Nanofabrication LaboratoryCAS Key Laboratory for Nanosystems and Hierachical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P. R. China
| | - Peipei Chen
- Nanofabrication LaboratoryCAS Key Laboratory for Nanosystems and Hierachical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P. R. China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049P. R. China
| | - Fengliang Dong
- Nanofabrication LaboratoryCAS Key Laboratory for Nanosystems and Hierachical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P. R. China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049P. R. China
| | - Lianfeng Sun
- Nanofabrication LaboratoryCAS Key Laboratory for Nanosystems and Hierachical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P. R. China
| | - Weiguo Chu
- Nanofabrication LaboratoryCAS Key Laboratory for Nanosystems and Hierachical FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P. R. China
- Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049P. R. China
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53
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Qiu K, Fato TP, Yuan B, Long YT. Toward Precision Measurement and Manipulation of Single-Molecule Reactions by a Confined Space. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1805426. [PMID: 30924293 DOI: 10.1002/smll.201805426] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/28/2019] [Indexed: 06/09/2023]
Abstract
All chemical reactions can be divided into a series of single molecule reactions (SMRs), the elementary steps that involve only isomerization of, dissociation from, and addition to an individual molecule. Analyzing SMRs is of paramount importance to identify the intrinsic molecular mechanism of a complex chemical reaction, which is otherwise implausible to reveal in an ensemble fashion, owing to the significant static and dynamic heterogeneity of real-world chemical systems. The single-molecule measurement and manipulation methods developed recently are playing an increasingly irreplaceable role to detect and recognize short-lived intermediates, visualize their transient existence, and determinate the kinetics and dynamics of single bond breaking and formation. Notably, none of the above SMRs characterizations can be realized without the aid of a confined space. Therefore, this Review aims to highlight the recent progress in the development of confined space enabled single-molecule sensing, imaging, and tuning methods to study chemical reactions. Future prospects of SMRs research are also included, including a push toward the physical limit on transduction of information to signals and vice versa, transmission and recording of signals, computational modeling and simulation, and rational design of a confined space for precise SMRs.
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Affiliation(s)
- Kaipei Qiu
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Tano Patrice Fato
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Bo Yuan
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Yi-Tao Long
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
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54
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Yang JM, Jin L, Pan ZQ, Zhou Y, Liu HL, Ji LN, Xia XH, Wang K. Surface-Enhanced Raman Scattering Probing the Translocation of DNA and Amino Acid through Plasmonic Nanopores. Anal Chem 2019; 91:6275-6280. [DOI: 10.1021/acs.analchem.9b01045] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Jin-Mei Yang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Lei Jin
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Zhong-Qin Pan
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
- School of Public Health, Institute of Analytical Chemistry for Life Science, Nantong University, Nantong 226019, China
| | - Yue Zhou
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Hai-Ling Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Li-Na Ji
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Xing-Hua Xia
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Kang Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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55
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Recent Advancement in the Surface-Enhanced Raman Spectroscopy-Based Biosensors for Infectious Disease Diagnosis. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9071448] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Diagnosis is the key component in disease elimination to improve global health. However, there is a tremendous need for diagnostic innovation for neglected tropical diseases that largely consist of mosquito-borne infections and bacterial infections. Early diagnosis of these infectious diseases is critical but challenging because the biomarkers are present at low concentrations, demanding bioanalytical techniques that can deliver high sensitivity with ensured specificity. Owing to the plasmonic nanomaterials-enabled high detection sensitivities, even up to single molecules, surface-enhanced Raman spectroscopy (SERS) has gained attention as an optical analytical tool for early disease biomarker detection. In this mini-review, we highlight the SERS-based assay development tailored to detect key types of biomarkers for mosquito-borne and bacterial infections. We discuss in detail the variations of SERS-based techniques that have developed to afford qualitative and quantitative disease biomarker detection in a more accurate, affordable, and field-transferable manner. Current and emerging challenges in the advancement of SERS-based technologies from the proof-of-concept phase to the point-of-care phase are also briefly discussed.
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56
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Bruzas I, Lum W, Gorunmez Z, Sagle L. Advances in surface-enhanced Raman spectroscopy (SERS) substrates for lipid and protein characterization: sensing and beyond. Analyst 2019; 143:3990-4008. [PMID: 30059080 DOI: 10.1039/c8an00606g] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) has become an essential ultrasensitive analytical tool for biomolecular analysis of small molecules, macromolecular proteins, and even cells. SERS enables label-free, direct detection of molecules through their intrinsic Raman fingerprint. In particular, protein and lipid bilayers are dynamic three-dimensional structures that necessitate label-free methods of characterization. Beyond direct detection and quantitation, the structural information contained in SERS spectra also enables deeper biophysical characterization of biomolecules near metallic surfaces. Therefore, SERS offers enormous potential for such systems, although making measurements in a nonperturbative manner that captures the full range of interactions and activity remains a challenge. Many of these challenges have been overcome through advances in SERS substrate development, which have expanded the applications and targets of SERS for direct biomolecular quantitation and biophysical characterization. In this review, we will first discuss different categories of SERS substrates including solution-phase, solid-supported, tip-enhanced Raman spectroscopy (TERS), and single-molecule substrates for biomolecular analysis. We then discuss detection of protein and biological lipid membranes. Lastly, biophysical insights into proteins, lipids and live cells gained through SERS measurements of these systems are reviewed.
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Affiliation(s)
- Ian Bruzas
- Department of Chemistry, University of Cincinnati, 301 Clifton Court, Cincinnati, OH 45221, USA.
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57
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Li Y, Bai H, Zhai J, Yi W, Li J, Yang H, Xi G. Alternative to Noble Metal Substrates: Metallic and Plasmonic Ti 3O 5 Hierarchical Microspheres for Surface Enhanced Raman Spectroscopy. Anal Chem 2019; 91:4496-4503. [PMID: 30854853 DOI: 10.1021/acs.analchem.8b05282] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Compared with noble metals, improving the sensitivity of semiconducting surface-enhanced Raman scattering (SERS) substrates is of great significance to their fundamental research and practical application of Raman spectroscopy. In this paper, it is found that the SERS sensitivity is increased by 10 000 times by reducing the semiconducting TiO2 microspheres to quasi-metallic Ti3O5 microspheres. Its lowest detectable limit is up to 10-10 M, which may be the best among the non-noble metal substrates and even reaches or exceeds certain Au/Ag nanostructures to the best of our knowledge. This new type of non-noble metal SERS substrate breaks through the bottleneck of poor stability of conventional semiconductor substrate and can withstand high temperature oxidation at 200 °C and strong acid-base corrosion without performance degradation. Benefiting from its excellent ability of visible-light photocatalytic degradation of organic molecules, the substrate can be reused. Moreover, the new material also exhibits excellent photothermal conversion properties.
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Affiliation(s)
- Yahui Li
- Institute of Industrial and Consumer Product Safety , Chinese Academy of Inspection and Quarantine , No. 11, Ronghua South Road , Beijing 100176 , P. R. China
| | - Hua Bai
- Institute of Industrial and Consumer Product Safety , Chinese Academy of Inspection and Quarantine , No. 11, Ronghua South Road , Beijing 100176 , P. R. China
| | - Junfeng Zhai
- Institute of Industrial and Consumer Product Safety , Chinese Academy of Inspection and Quarantine , No. 11, Ronghua South Road , Beijing 100176 , P. R. China
| | - Wencai Yi
- Laboratory of High Pressure Physics and Material Science, School of Physics and Physical Engineering , Qufu Normal University , Qufu 273165 , China
| | - Junfang Li
- Institute of Industrial and Consumer Product Safety , Chinese Academy of Inspection and Quarantine , No. 11, Ronghua South Road , Beijing 100176 , P. R. China
| | - Haifeng Yang
- Institute of Industrial and Consumer Product Safety , Chinese Academy of Inspection and Quarantine , No. 11, Ronghua South Road , Beijing 100176 , P. R. China
| | - Guangcheng Xi
- Institute of Industrial and Consumer Product Safety , Chinese Academy of Inspection and Quarantine , No. 11, Ronghua South Road , Beijing 100176 , P. R. China
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58
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Formation of Interstitial Hot-Spots Using the Reduced Gap-Size between Plasmonic Microbeads Pattern for Surface-Enhanced Raman Scattering Analysis. SENSORS 2019; 19:s19051046. [PMID: 30823667 PMCID: PMC6427690 DOI: 10.3390/s19051046] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 02/21/2019] [Accepted: 02/21/2019] [Indexed: 12/28/2022]
Abstract
To achieve an effective surface-enhanced Raman scattering (SERS) sensor with periodically distributed "hot spots" on wafer-scale substrates, we propose a hybrid approach combining physical nano-imprint lithography and a chemical deposition method to form a silver microbead array. Nano-imprint lithography (NIL) can lead to mass-production and high throughput, but is not appropriate for generating strong "hot-spots." However, when we apply electrochemical deposition to an NIL substrate and the reaction time was increased to 45 s, periodical "hot-spots" between the microbeads were generated on the substrates. It contributed to increasing the enhancement factor (EF) and lowering the detection limit of the substrates to 4.40 × 10⁶ and 1.0 × 10-11 M, respectively. In addition, this synthetic method exhibited good substrate-to-substrate reproducibility (RSD < 9.4%). Our research suggests a new opportunity for expanding the SERS application.
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59
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Ran P, Jiang L, Li X, Li B, Zuo P, Lu Y. Femtosecond Photon-Mediated Plasma Enhances Photosynthesis of Plasmonic Nanostructures and Their SERS Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1804899. [PMID: 30748108 DOI: 10.1002/smll.201804899] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 01/27/2019] [Indexed: 05/08/2023]
Abstract
Laser ablation in liquid has proven to be a universal and green method to synthesize nanocrystals and fabricate functional nanostructures. This study demonstrates the superiority of femtosecond laser-mediated plasma in enhancing photoredox of metal cations for controllable fabrication of plasmonic nanostructures in liquid. Through employing upstream high energetic plasma during laser-induced microexplosions, single/three-electron photoreduction of metallic cations can readily occur without chemical reductants or capping agents. Experimental evidences demonstrate that this process exhibits higher photon utilization efficiency in yield of colloidal metal nanoparticles than direct irradiation of metallic precursors. Photogenerated hydrated electrons derived from strong ionization of silicon and water are responsible for this enhanced consequences. Furthermore, these metallic nanoparticles are accessible to self-assemble into nanoplates for silver and nanospheres for gold, favored by surface-tension gradients between laser irradiated and unirradiated regions. These metallic nanostructures exhibit excellent surface-enhanced Raman spectroscopy performance in trace detection of Rhodamine 6G (R6G), 4-mercaptobenzoic acid (4-MBA), and mercapto-5-nitrobenzimidazole molecules with high sensitivity (down to 10-12 mol L-1 , 30 × 10-15 m for R6G), good reproducibility (relative standard deviation < 7%), and good dual-analyte detection ability with mixture ratios of R6G to 4-MBA ranging from 20 to 0.025. The conceptual importance of this plasma-enhanced-photochemical process may provide exciting opportunities in photochemical reactions, plasmofluidics, and material synthesis.
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Affiliation(s)
- Peng Ran
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Lan Jiang
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Xin Li
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Bo Li
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Pei Zuo
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Yongfeng Lu
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588-0511, USA
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60
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Li J, Yan H, Tan X, Lu Z, Han H. Cauliflower-Inspired 3D SERS Substrate for Multiple Mycotoxins Detection. Anal Chem 2019; 91:3885-3892. [DOI: 10.1021/acs.analchem.8b04622] [Citation(s) in RCA: 131] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jinjie Li
- State Key Laboratory of Agricultural Microbiology, College of Food Science and Technology, College of Science, Huazhong Agricultural University, Wuhan, Hubei 430070, People’s Republic of China
| | - Heng Yan
- Hubei Provincial Engineering and Technology Research Center for Food Quality and Safety Test, Hubei Provincial Institute for Food Supervision and Test, Wuhan, Hubei 430075, People’s Republic of China
| | - Xuecai Tan
- School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530008, People’s Republic of China
| | - Zhicheng Lu
- State Key Laboratory of Agricultural Microbiology, College of Food Science and Technology, College of Science, Huazhong Agricultural University, Wuhan, Hubei 430070, People’s Republic of China
| | - Heyou Han
- State Key Laboratory of Agricultural Microbiology, College of Food Science and Technology, College of Science, Huazhong Agricultural University, Wuhan, Hubei 430070, People’s Republic of China
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61
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Gu P, Zhou Z, Zhao Z, Möhwald H, Li C, Chiechi RC, Shi Z, Zhang G. 3D zig-zag nanogaps based on nanoskiving for plasmonic nanofocusing. NANOSCALE 2019; 11:3583-3590. [PMID: 30729970 DOI: 10.1039/c8nr08946a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We combine anisotropic wet etching and nanoskiving to create a novel three-dimensional (3D) nanoantenna for plasmonic nanofocusing, vertically aligned zig-zag nanogaps, constituted of nanogaps with defined angles. Instead of conventional lithography, we used the thickness of a self-assembled monolayer (SAM) to define nanogaps with high throughput, and anisotropic etching of Si V-grooves to naturally define ultra-sharp tips. Both nanogaps and sharp tips can synergistically squeeze the electro-magnetic (EM) field and excite 3D nanofocusing, enabling great potential applications in chemical sensing and plasmonic devices. The dependence of the EM field enhancement on structural features is systematically investigated and optimized. We found that the field enhancement and confinement are stronger at the tipped-nanogap compared to what standalone tips or nanogaps produce. The intensity of surface-enhanced Raman spectroscopy (SERS) recorded on the 70.5° tipped-nanogaps is 45 times higher than that recorded with linear nanogaps and 5 times higher than that recorded with tip-only nanowires, which is attributed to the integration of the tip and gap in plasmonic nanostructures. This proposed nanofabrication technique and the resulting structures equipped with a strongly enhanced EM field will promote broad applications for nanophotonics and surface-enhanced spectroscopy.
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Affiliation(s)
- Panpan Gu
- State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P.R. China.
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Zimmermann P, Hötger A, Fernandez N, Nolinder A, Müller K, Finley JJ, Holleitner AW. Toward Plasmonic Tunnel Gaps for Nanoscale Photoemission Currents by On-Chip Laser Ablation. NANO LETTERS 2019; 19:1172-1178. [PMID: 30608702 DOI: 10.1021/acs.nanolett.8b04612] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We demonstrate that prestructured metal nanogaps can be shaped on-chip to below 10 nm by femtosecond laser ablation. We explore the plasmonic properties and the nonlinear photocurrent characteristics of the formed tunnel junctions. The photocurrent can be tuned from multiphoton absorption toward the laser-induced strong-field tunneling regime in the nanogaps. We demonstrate that a unipolar ballistic electron current is achieved by designing the plasmonic junctions to be asymmetric, which allows ultrafast electronics on the nanometer scale.
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Affiliation(s)
- Philipp Zimmermann
- Walter Schottky Institute and Physics Department , Technical University of Munich , Am Coulombwall 4a , Garching 85748 , Germany
- Nanosystems Initiative Munich (NIM) , Schellingstr. 4 , Munich 80799 , Germany
| | - Alexander Hötger
- Walter Schottky Institute and Physics Department , Technical University of Munich , Am Coulombwall 4a , Garching 85748 , Germany
| | - Noelia Fernandez
- Walter Schottky Institute and Physics Department , Technical University of Munich , Am Coulombwall 4a , Garching 85748 , Germany
| | - Anna Nolinder
- Walter Schottky Institute and Physics Department , Technical University of Munich , Am Coulombwall 4a , Garching 85748 , Germany
| | - Kai Müller
- Walter Schottky Institute and Physics Department , Technical University of Munich , Am Coulombwall 4a , Garching 85748 , Germany
| | - Jonathan J Finley
- Walter Schottky Institute and Physics Department , Technical University of Munich , Am Coulombwall 4a , Garching 85748 , Germany
- Nanosystems Initiative Munich (NIM) , Schellingstr. 4 , Munich 80799 , Germany
| | - Alexander W Holleitner
- Walter Schottky Institute and Physics Department , Technical University of Munich , Am Coulombwall 4a , Garching 85748 , Germany
- Nanosystems Initiative Munich (NIM) , Schellingstr. 4 , Munich 80799 , Germany
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63
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Yang Y, Gu C, Li J. Sub-5 nm Metal Nanogaps: Physical Properties, Fabrication Methods, and Device Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1804177. [PMID: 30589217 DOI: 10.1002/smll.201804177] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 11/29/2018] [Indexed: 05/26/2023]
Abstract
Sub-5 nm metal nanogaps have attracted widespread attention in physics, chemistry, material sciences, and biology due to their physical properties, including great plasmon-enhanced effects in light-matter interactions and charge tunneling, Coulomb blockade, and the Kondo effect under an electrical stimulus. These properties especially meet the needs of many cutting-edge devices, such as sensing, optical, molecular, and electronic devices. However, fabricating sub-5 nm nanogaps is still challenging at the present, and scaled and reliable fabrication, improved addressability, and multifunction integration are desired for further applications in commercial devices. The aim of this work is to provide a comprehensive overview of sub-5 nm nanogaps and to present recent advancements in metal nanogaps, including their physical properties, fabrication methods, and device applications, with the ultimate aim to further inspire scientists and engineers in their research.
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Affiliation(s)
- Yang Yang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Changzhi Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Junjie Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
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64
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Niciński K, Witkowska E, Korsak D, Noworyta K, Trzcińska-Danielewicz J, Girstun A, Kamińska A. Photovoltaic cells as a highly efficient system for biomedical and electrochemical surface-enhanced Raman spectroscopy analysis. RSC Adv 2019; 9:576-591. [PMID: 35517626 PMCID: PMC9059484 DOI: 10.1039/c8ra08319c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 12/13/2018] [Indexed: 12/13/2022] Open
Abstract
Surface-enhanced Raman scattering (SERS) has been intensively used recently as a highly sensitive, non-destructive, chemical specific, and label-free technique for a variety of studies. Here, we present a novel SERS substrate for: (i) the standard ultra-trace analysis, (ii) detection of whole microorganisms, and (iii) spectroelectrochemical measurements. The integration of electrochemistry and SERS spectroscopy is a powerful approach for in situ investigation of the structural changes of adsorbed molecules, their redox properties, and for studying the intermediates of the reactions. We have developed a conductive SERS platform based on photovoltaic materials (PV) covered with a thin layer of silver, especially useful in electrochemical SERS analysis. These substrates named Ag/PV presented in this study combine crucial spectroscopic features such as high sensitivity, reproducibility, specificity, and chemical/physical stability. The designed substrates permit the label-free identification and differentiation of cancer cells (renal carcinoma) and pathogens (Escherichia coli and Bacillus subtilis). In addition, the developed SERS platform was adopted as the working electrode in an electrochemical SERS approach for p-aminothiophenol (p-ATP) studies. The capability to monitor in real-time the electrochemical changes spectro-electro-chemically has great potential for broadening the application of SERS.
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Affiliation(s)
- K Niciński
- 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
| | - D Korsak
- Department of Applied Microbiology, Institute of Microbiology, Faculty of Biology, University of Warsaw Miecznikowa 1 02-096 Warsaw Poland
| | - K Noworyta
- Institute of Physical Chemistry, Polish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
| | - J Trzcińska-Danielewicz
- Department of Molecular Biology, Institute of Biochemistry, Faculty of Biology, University of Warsaw Miecznikowa 1 02-096 Warsaw Poland
| | - A Girstun
- Department of Molecular Biology, Institute of Biochemistry, Faculty of Biology, University of Warsaw Miecznikowa 1 02-096 Warsaw Poland
| | - A Kamińska
- Institute of Physical Chemistry, Polish Academy of Sciences Kasprzaka 44/52 01-224 Warsaw Poland
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65
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Zhang Y, Zhou H, Shen Q, Shao Z, Xu L, Luo Z. Silver Nanostructures on Graphene Oxide as the Substrate for Surface-Enhanced Raman Scattering (SERS). ANAL LETT 2019. [DOI: 10.1080/00032719.2018.1548554] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Ying Zhang
- Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province, College of Electronic and optical Engineering & College of Microelectronic Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, China
| | - Hao Zhou
- Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province, College of Electronic and optical Engineering & College of Microelectronic Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, China
| | - Qi Shen
- Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province, College of Electronic and optical Engineering & College of Microelectronic Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, China
| | - Zhouwei Shao
- Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province, College of Electronic and optical Engineering & College of Microelectronic Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, China
| | - Lin Xu
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, China
| | - Zhimin Luo
- Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province, College of Electronic and optical Engineering & College of Microelectronic Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, China
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66
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Jin HM, Kim JY, Heo M, Jeong SJ, Kim BH, Cha SK, Han KH, Kim JH, Yang GG, Shin J, Kim SO. Ultralarge Area Sub-10 nm Plasmonic Nanogap Array by Block Copolymer Self-Assembly for Reliable High-Sensitivity SERS. ACS APPLIED MATERIALS & INTERFACES 2018; 10:44660-44667. [PMID: 30480431 DOI: 10.1021/acsami.8b17325] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Effective surface enhancement of Raman scattering (SERS) requires strong near-field enhancement as well as effective light collection of plasmonic structures. To this end, plasmonic nanoparticle (NP) arrays with narrow gaps or sharp tips have been suggested as desirable structures. We present a highly dense and uniform Au nanoscale gap array enabled by the customized design of NP shape and arrangement employing block copolymer self-assembly. Block copolymer self-assembly in thin films offers uniform hexagonally packed nanopost template arrays over the entire surface of a 2 in. wafer. Conventional evaporative metal deposition over the nanotemplate surface allows precise geometric control and positional arrangement of metal NPs, constituting tunable, strong plasmonic near-field enhancement particularly at the "hot spots" near interparticular nanoscale gaps. Underlying field distribution has been investigated by a finite-difference time-domain simulation. In the detection of thiophenol, our Au nanogap array shows a remarkable enhancement of Raman intensity greater than ∼104, a standard deviation as small as 12.3% compared to that of the planar Au thin film. In addition, adenine biomolecules can be detected with a detection limit as low as 100 nM. Our approach proposes highly sensitive and reliable SERS on the basis of a scalable, low-cost bottom-up strategy.
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Affiliation(s)
| | - Ju Young Kim
- Multidisciplinary Sensor Research Group , Electronics and Telecommunications Research Institute (ETRI) , Daejeon 34129 , Republic of Korea
| | | | - Seong-Jun Jeong
- Department of Organic Materials and Fiber Engineering , Soongsil University , 369 Sangdo-ro , Dongjak-gu, Seoul 06978 , Republic of Korea
- Department of Information Communication, Materials, and Chemistry Convergence Technology , Soongsil University , 369 Sangdo-ro , Dongjak-gu, Seoul 06978 , Republic of Korea
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67
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Mao P, Liu C, Favraud G, Chen Q, Han M, Fratalocchi A, Zhang S. Broadband single molecule SERS detection designed by warped optical spaces. Nat Commun 2018; 9:5428. [PMID: 30575738 PMCID: PMC6303368 DOI: 10.1038/s41467-018-07869-5] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 11/30/2018] [Indexed: 11/20/2022] Open
Abstract
Engineering hotspots is of crucial importance in many applications including energy harvesting, nano-lasers, subwavelength imaging, and biomedical sensing. Surface-enhanced Raman scattering spectroscopy is a key technique to identify analytes that would otherwise be difficult to diagnose. In standard systems, hotspots are realised with nanostructures made by acute tips or narrow gaps. Owing to the low probability for molecules to reach such tiny active regions, high sensitivity is always accompanied by a large preparation time for analyte accumulation which hinders the time response. Inspired by transformation optics, we introduce an approach based on warped spaces to manipulate hotspots, resulting in broadband enhancements in both the magnitude and volume. Experiments for single molecule detection with a fast soaking time are realised in conjunction with broadband response and uniformity. Such engineering could provide a new design platform for a rich manifold of devices, which can benefit from broadband and huge field enhancements. In standard SERS the probability for the molecules to reach tiny hotpot regions is low. Here, the authors introduce an approach based on warped spaces that offers a strategy to manipulate hotspots of metallic nanostructures, resulting in large broadband enhancements in both the magnitude and the volume size.
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Affiliation(s)
- Peng Mao
- School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, United Kingdom.,College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China
| | - Changxu Liu
- School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, United Kingdom
| | - Gael Favraud
- PRIMALIGHT, Faculty of Electrical Engineering, Applied Mathematics and Computational Science, KAUST, Thuwal, 23955-6900, Saudi Arabia
| | - Qiang Chen
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
| | - Min Han
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Andrea Fratalocchi
- PRIMALIGHT, Faculty of Electrical Engineering, Applied Mathematics and Computational Science, KAUST, Thuwal, 23955-6900, Saudi Arabia.
| | - Shuang Zhang
- School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, United Kingdom.
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68
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Fothergill SM, Joyce C, Xie F. Metal enhanced fluorescence biosensing: from ultra-violet towards second near-infrared window. NANOSCALE 2018; 10:20914-20929. [PMID: 30324956 DOI: 10.1039/c8nr06156d] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
To increase disease survival rates, there is a vital need for diagnosis at very preliminary stages. Then, low concentrations of biomarkers are present which must be effectively detected and quantified for reliable diagnosis. Fluorescent biosensing is commonly enabled through the labelling of these biomarkers with nanostructures and fluorophores. Metal Enhanced Fluorescence (MEF) is a phenomenon whereby the intensity of a fluorescent biosensor signal can be considerably enhanced by placing a metallic nanostructure and fluorophore in close proximity. Importantly, this allows for an even lower detection limit and thus earlier diagnosis. In recent years, extraordinary efforts have been made in the understanding of how the chemical and physical properties of nanomaterials may be exploited advantageously. Via precise nanoscale engineering, it is possible to optimize the optical properties of plasmonic nanomaterials, which now need to be refined and applied in diagnostics. Through MEF, the intensity of this signal can be related in direct proportion to analyte concentration, allowing for diagnosis of disease at an earlier stage than previously. This review paper outlines the potential and recent progress of applied MEF biosensors, highlighting their substantial clinical potential. MEF biosensors are presented both upon assay-based platforms and in solution, with comments on the various metallic nanoparticle morphologies available. This is explored across various emission wavelengths from ultra-violet to the second near infrared window (NIR-II), emphasising their wide applicability. Further to this, the importance of near infrared (NIR-I and NIR-II) biosensing is made clear as it allows for higher penetration in biological media. Finally, by developing multiplexing techniques, multiple and simultaneous analyses of analytes can be achieved. Through the incorporation of metal enhanced fluorescence into biosensing, it will be possible to diagnose disease more rapidly and more reliably than before, with the potential to save countless lives.
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Affiliation(s)
- Sarah Madeline Fothergill
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
| | - Caoimhe Joyce
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
| | - Fang Xie
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
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69
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De Silva Indrasekara AS, Norton SJ, Geitner NK, Crawford BM, Wiesner MR, Vo-Dinh T. Tailoring the Core-Satellite Nanoassembly Architectures by Tuning Internanoparticle Electrostatic Interactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14617-14623. [PMID: 30407828 DOI: 10.1021/acs.langmuir.8b02792] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The use of plasmonic nanoplatforms has received increasing interest in a wide variety of fields ranging from theranostics to environmental sensing to plant biology. In particular, the development of plasmonic nanoparticles into ordered nanoclusters has been of special interest due to the new chemical functionalities and optical responses that they can introduce. However, achieving predetermined nanocluster architectures from bottom-up approaches in the colloidal solution state still remains a great challenge. Herein, we report a one-pot assembly approach that provides flexibility in precise control of core-satellite nanocluster architectures in the colloidal solution state. We found that the pH of the assembly medium plays a vital role in the hierarchy of the nanoclusters. The architecture along with the size of the satellite gold nanoparticles determines the optical responses of nanoclusters. Using electron microscopy and optical spectroscopy, we introduce a set of design rules for the synthesis of distinct architectures of silica-core gold satellites nanoclusters in the colloidal solution state. Our findings provide insight into advancing the colloidal solution state nanoclusters formation with predictable architectures and optical properties.
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70
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Hahm E, Cha MG, Kang EJ, Pham XH, Lee SH, Kim HM, Kim DE, Lee YS, Jeong DH, Jun BH. Multilayer Ag-Embedded Silica Nanostructure as a Surface-Enhanced Raman Scattering-Based Chemical Sensor with Dual-Function Internal Standards. ACS APPLIED MATERIALS & INTERFACES 2018; 10:40748-40755. [PMID: 30375227 DOI: 10.1021/acsami.8b12640] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy is attractive in various detection analysis fields. However, the quantitative method using SERS spectroscopy remains as an area to be developed. The key issues in developing quantitative analysis methods by using SERS spectroscopy are the fabrication of reliable SERS-active materials such as nanoparticle-based structures and the acquisition of the SERS signal without any disturbance that may change the SERS signal intensity and frequency. Here, the fabrication of seamless multilayered core-shell nanoparticles with an embedded Raman label compound as an internal standard (MLRLC dots) for quantitative SERS analysis is reported. The embedded Raman label compound in the nanostructure provides a reference value for calibrating the SERS signals. By using the MLRLC dots, it is possible to gain target analyte signals of different concentrations while retaining the Raman signal of the internal standard. The ML4-BBT dots, containing 4-bromobenzenethiol (4-BBT) as an internal standard, are successfully applied in the quantitative analysis of 4-fluorobenzenethiol and thiram, a model pesticide. Additionally, ratiometric analysis was proved practical through normalization of the relative SERS intensity. The ratiometric strategy could be applied to various SERS substrates for quantitative detection of a wide variety of targets.
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Affiliation(s)
- Eunil Hahm
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
| | | | - Eun Ji Kang
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
| | - Xuan-Hung Pham
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
| | - Sang Hun Lee
- Department of Bioengineering , University of California Berkeley , Berkeley , California 94720 , United States
| | - Hyung-Mo Kim
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
| | - Dong-Eun Kim
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
| | | | | | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology , Konkuk University , Seoul 05029 , Republic of Korea
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71
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Guo C, Chen X, Ding SY, Mayer D, Wang Q, Zhao Z, Ni L, Liu H, Lee T, Xu B, Xiang D. Molecular Orbital Gating Surface-Enhanced Raman Scattering. ACS NANO 2018; 12:11229-11235. [PMID: 30335940 DOI: 10.1021/acsnano.8b05826] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
One of the promising approaches to meet the urgent demand for further device miniaturization is to create functional devices using single molecules. Although various single-molecule electronic devices have been demonstrated recently, single-molecule optical devices which use external stimulations to control the optical response of a single molecule have rarely been reported. Here, we propose and demonstrate a field-effect Raman scattering (FERS) device with a single molecule, an optical counterpart to field-effect transistors (a key component of modern electronics). With our devices, the gap size between electrodes can be precisely adjusted at subangstrom accuracy to form single molecular junctions as well as to reach the maximum performance of Raman scattering via plasmonic enhancement. Based on this maximum performance, we demonstrated that the intensity of Raman scattering can be further enhanced by an additional ∼40% if the orbitals of the molecules bridged two electrodes were shifted by a gating voltage. This finding not only provides a method to increase the sensitivity of Raman scattering beyond the limit of plasmonic enhancement, but also makes it feasible to realize addressable functional FERS devices with a gate electrode array.
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Affiliation(s)
- Chenyang Guo
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Key Laboratory of Optical Information Science and Technology, Institute of Modern Optics, College of Electronic Information and Optical Engineering , Nankai University , Tianjin 300071 , China
| | - Xing Chen
- Department of Chemistry , The Pennsylvania State University , State College , Pennsylvania 16802 , United States
| | - Song-Yuan Ding
- State Key Laboratory of Physical Chemistry of Solid Surfaces (PCOSS), Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), and Department of Chemistry, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Dirk Mayer
- Peter-Grünberg-Institute PGI-8, Bioelectronic Research Center Jülich GmbH and JARA Fundamentals of Future Information Technology , Jülich 52425 , Germany
| | - Qingling Wang
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Key Laboratory of Optical Information Science and Technology, Institute of Modern Optics, College of Electronic Information and Optical Engineering , Nankai University , Tianjin 300071 , China
| | - Zhikai Zhao
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Key Laboratory of Optical Information Science and Technology, Institute of Modern Optics, College of Electronic Information and Optical Engineering , Nankai University , Tianjin 300071 , China
- Department of Physics and Astronomy , Seoul National University , Seoul 08826 , Korea
| | - Lifa Ni
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Key Laboratory of Optical Information Science and Technology, Institute of Modern Optics, College of Electronic Information and Optical Engineering , Nankai University , Tianjin 300071 , China
- College of Engineering , University of Georgia , Athens , Georgia 30602 , United States
| | - Haitao Liu
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Key Laboratory of Optical Information Science and Technology, Institute of Modern Optics, College of Electronic Information and Optical Engineering , Nankai University , Tianjin 300071 , China
| | - Takhee Lee
- Department of Physics and Astronomy , Seoul National University , Seoul 08826 , Korea
| | - Bingqian Xu
- College of Engineering , University of Georgia , Athens , Georgia 30602 , United States
| | - Dong Xiang
- Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Key Laboratory of Optical Information Science and Technology, Institute of Modern Optics, College of Electronic Information and Optical Engineering , Nankai University , Tianjin 300071 , China
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72
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Fu C, Jin S, Shi W, Oh J, Cao H, Jung YM. Catalyzed Deposition of Signal Reporter for Highly Sensitive Surface-Enhanced Raman Spectroscopy Immunoassay Based on Tyramine Signal Amplification Strategy. Anal Chem 2018; 90:13159-13162. [DOI: 10.1021/acs.analchem.8b02419] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Cuicui Fu
- Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Korea
| | - Sila Jin
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Korea
| | - Wenbing Shi
- Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Joohee Oh
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Korea
| | - Haiyan Cao
- Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Young Mee Jung
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Korea
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73
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Dies H, Nosrati R, Raveendran J, Escobedo C, Docoslis A. SERS-from-scratch: An electric field-guided nanoparticle assembly method for cleanroom-free and low-cost preparation of surface-enhanced Raman scattering substrates. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.05.073] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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74
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Zhao W, Xiao S, Zhang Y, Pan D, Wen J, Qian X, Wang D, Cao H, He W, Quan M, Yang Z. Binary "island" shaped arrays with high-density hot spots for surface-enhanced Raman scattering substrates. NANOSCALE 2018; 10:14220-14229. [PMID: 30009308 DOI: 10.1039/c8nr02669f] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We have demonstrated a facile and low-cost approach for the fabrication of binary "island" shaped arrays (BISA) with high-density hot spots as reproducible surface-enhanced Raman scattering (SERS) substrates by depositing a self-assembled monolayer Au nanoparticle (AuNP) film with small gaps onto a two-dimensional (2D) silica microsphere opal structure. By varying the size of silica spheres, the SERS performance of the BISA substrate with an enhancement factor (EF) of 3.74 × 1010 magnitude and the corresponding signal intensity deviation of below 8% using 770 nm silica sphere arrays were achieved. Compared with the assembled monolayer AuNP film on a planar substrate, the BISA enabled the installation of more AuNPs as a source of hot spots due to the undulation of morphology on the nanoscale within the designated laser-illumination area. In addition, a finite-difference time-domain (FDTD) simulation suggested that the BISA structure provided geometric conditions for increasing the intensity of the formed hot spots, and the strong periodic electric fields on the BISA are located not only in the gap between adjacent AuNPs, but also along the boundary of the neighboring island of silica spheres. Surface plasmon-decayed hot carriers (hot electrons and hot holes) from AuNPs can be applied in the field of energy conversion (i.e., photocatalysis), integrated with the SERS as a sensitive optical indicator to accurately monitor the catalytic reaction process. Furthermore, we examined the catalytic reaction process of the dimerization of 4-ATP into DMAB and found that photocatalytic activity could be tuned by changing the size of silica spheres. This study provides a new design route for the fabrication of the SERS platform with high sensitivity and reproducibility to detect molecules or improve catalyst efficiency.
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Affiliation(s)
- Weidong Zhao
- Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Shuyuan Xiao
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Yuxian Zhang
- Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Dong Pan
- Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Jiahui Wen
- Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Ximei Qian
- Department of Biomedical Engineering, Emory University, 1760 Haygood Dr, Atlanta 30322, Georgia, USA
| | - Dong Wang
- Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Hui Cao
- Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Wanli He
- Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Maohua Quan
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, P. R. China.
| | - Zhou Yang
- Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
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75
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Devaraj V, Lee JM, Oh JW. Distinguishable Plasmonic Nanoparticle and Gap Mode Properties in a Silver Nanoparticle on a Gold Film System Using Three-Dimensional FDTD Simulations. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E582. [PMID: 30061493 PMCID: PMC6116242 DOI: 10.3390/nano8080582] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 07/13/2018] [Accepted: 07/27/2018] [Indexed: 12/12/2022]
Abstract
We present a computational study of the near-field enhancement properties from a plasmonic nanomaterial based on a silver nanoparticle on a gold film. Our simulation studies show a clear distinguishability between nanoparticle mode and gap mode as a function of dielectric layer thickness. The observed nanoparticle mode is independent of dielectric layer thickness, and hence its related plasmonic properties can be investigated clearly by having a minimum of ~10-nm-thick dielectric layer on a metallic film. In case of the gap mode, the presence of minimal dielectric layer thickness is crucial (~≤4 nm), as deterioration starts rapidly thereafter. The proposed simple tunable gap-based particle on film design might open interesting studies in the field of plasmonics, extreme light confinement, sensing, and source enhancement of an emitter.
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Affiliation(s)
- Vasanthan Devaraj
- Research Center for Energy Convergence and Technology Division, Pusan National University, Busan 46241, Korea.
| | - Jong-Min Lee
- Research Center for Energy Convergence and Technology Division, Pusan National University, Busan 46241, Korea.
| | - Jin-Woo Oh
- Research Center for Energy Convergence and Technology Division, Pusan National University, Busan 46241, Korea.
- Department of Nano Fusion Technology, Pusan National University, Busan 46241, Korea.
- Department of Nanoenergy Engineering, Pusan National University, Busan 46241, Korea.
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76
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Huanga X, Liu Y, Barr J, Song J, He Z, Wang Y, Nie Z, Xiong Y, Chen X. Controllable self-assembled plasmonic vesicle-based three-dimensional SERS platform for picomolar detection of hydrophobic contaminants. NANOSCALE 2018; 10:13202-13211. [PMID: 29971281 PMCID: PMC6069524 DOI: 10.1039/c8nr02778a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Hydrophobic contaminants in food and the environment seriously threaten human health. The ultrasensitive detection of these pollutants can minimize their damage. However, current ultrasensitive sensing strategies are limited to solid substrate-based surface-enhanced Raman spectroscopy (SERS) detection. Herein, we report a controllable and reproducible solution-based SERS detection platform for the direct and ultrasensitive detection of hydrophobic contaminants by using self-assembled three-dimensional plasmonic vesicles. To this end, amphiphilic gold nanoparticles (AuNPs) tethered with linear block copolymer (BCP) of polystyrene-b-poly (ethylene oxide) (PS-b-PEO) were designed, which display dual functions for improving detection sensitivity, including serving as building blocks for the construction of plasmonic vesicles to yield large numbers of hot-spots for SERS enhancement, and providing hydrophobic PS layers to enrich and concentrate target hydrophobic molecules for direct SERS detection with hydrophobic interaction. By modulating the AuNP size and the length of BCP chains, the ultrahigh detection sensitivity, down to the picomolar level, was obtained via using 80 nm AuNPs tethered with BCP of PEO45-b-PS900-SH. In addition, the proposed method exhibits excellent reproducibility, universality, practicability, as well as multiplexing detection capacity in actual contaminant-spiked soil samples. Briefly, the designed self-assembled plasmonic vesicle-based SERS platform provides an ideal generic methodology for the ultrasensitive detection of hydrophobic contaminants that can greatly accelerate on-site testing in food and environmental monitoring.
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Affiliation(s)
- Xiaolin Huanga
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China.
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States. ,
| | - Yijing Liu
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States. ,
| | - Jim Barr
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
| | - Jibin Song
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States. ,
| | - Zhimei He
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States. ,
| | - Yongmei Wang
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
| | - Zhihong Nie
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Yonghua Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China.
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States. ,
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77
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Liu F, Song B, Su G, Liang O, Zhan P, Wang H, Wu W, Xie Y, Wang Z. Sculpting Extreme Electromagnetic Field Enhancement in Free Space for Molecule Sensing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1801146. [PMID: 30003669 DOI: 10.1002/smll.201801146] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 05/26/2018] [Indexed: 05/04/2023]
Abstract
A strongly confined and enhanced electromagnetic (EM) field due to gap-plasmon resonance offers a promising pathway for ultrasensitive molecular detections. However, the maximum enhanced portion of the EM field is commonly concentrated within the dielectric gap medium that is inaccessible to external substances, making it extremely challenging for achieving single-molecular level detection sensitivity. Here, a new family of plasmonic nanostructure created through a unique process using nanoimprint lithography is introduced, which enables the precise tailoring of the gap plasmons to realize the enhanced field spilling to free space. The nanostructure features arrays of physically contacted nanofinger-pairs with a 2 nm tetrahedral amorphous carbon (ta-C) film as an ultrasmall dielectric gap. The high tunneling barrier offered by ta-C film due to its low electron affinity makes an ultranarrow gap and high enhancement factor possible at the same time. Additionally, its high electric permittivity leads to field redistribution and an abrupt increase across the ta-C/air boundary and thus extensive spill-out of the coupled EM field from the gap region with field enhancement in free space of over 103 . The multitude of benefits deriving from the unique nanostructure hence allows extremely high detection sensitivity at the single-molecular level to be realized as demonstrated through bianalyte surface-enhanced Raman scattering measurement.
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Affiliation(s)
- Fanxin Liu
- School of Physics, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
- Collaborative Innovation Center for Information Technology in Biological and Medical Physics, and College of Science, Zhejiang University of Technology, Hangzhou, 310023, P. R. China
| | - Boxiang Song
- Department of Electrical Engineering-Electrophysics, University of Southern California, Los Angeles, CA, 90089, USA
| | - Guangxu Su
- School of Physics, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
| | - Owen Liang
- Department of Materials Science and Engineering, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Peng Zhan
- School of Physics, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
| | - Han Wang
- Department of Electrical Engineering-Electrophysics, University of Southern California, Los Angeles, CA, 90089, USA
| | - Wei Wu
- Department of Electrical Engineering-Electrophysics, University of Southern California, Los Angeles, CA, 90089, USA
| | - Yahong Xie
- Department of Materials Science and Engineering, University of California Los Angeles, Los Angeles, CA, 90095, USA
- Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, CA, 90024, USA
| | - Zhenlin Wang
- School of Physics, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China
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78
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Plasmonic Nanowires for Wide Wavelength Range Molecular Sensing. MATERIALS 2018; 11:ma11050827. [PMID: 29772804 PMCID: PMC5978204 DOI: 10.3390/ma11050827] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/06/2018] [Accepted: 05/14/2018] [Indexed: 11/17/2022]
Abstract
In this paper, we propose the use of a standing nanowires array, constituted by plasmonic active gold wires grown on iron disks, and partially immersed in a supporting alumina matrix, for surface-enhanced Raman spectroscopy applications. The galvanic process was used to fabricate nanowires in pores of anodized alumina template, making this device cost-effective. This fabrication method allows for the selection of size, diameter, and spatial arrangement of nanowires. The proposed device, thanks to a detailed design analysis, demonstrates a broadband plasmonic enhancement effect useful for many standard excitation wavelengths in the visible and NIR. The trigonal pores arrangement gives an efficiency weakly dependent on polarization. The devices, tested with 633 and 830 nm laser lines, show a significant Raman enhancement factor, up to around 6 × 104, with respect to the flat gold surface, used as a reference for the measurements of the investigated molecules.
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79
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Watanabe K, Kuroda K, Nagao D. External-Stimuli-Assisted Control over Assemblies of Plasmonic Metals. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E794. [PMID: 29762465 PMCID: PMC5978171 DOI: 10.3390/ma11050794] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/07/2018] [Accepted: 05/09/2018] [Indexed: 01/26/2023]
Abstract
Assembly of plasmonic nanoparticles (NPs) in suspensions is a promising approach for the control of optical and sensing properties that depend on the assembled states of plasmonic NPs. This review focuses on the controlling methods to assemble the NP via external stimuli such as pH, temperature, light, magnetic field, and electric field. External stimuli are introduced as powerful tools to assemble the NPs because of various operational factors, such as the intensity, application time, and frequency, which can be employed. In addition to a summary of recent studies on the controlling methods, a future study on the reversible control over assembled states of the plasmonic NPs via external stimuli is proposed.
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Affiliation(s)
- Kanako Watanabe
- Department of Chemical Engineering, Tohoku University, Sendai 980-8579, Japan.
| | - Kotaro Kuroda
- Department of Chemical Engineering, Tohoku University, Sendai 980-8579, Japan.
| | - Daisuke Nagao
- Department of Chemical Engineering, Tohoku University, Sendai 980-8579, Japan.
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80
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Lu H, Zhu L, Zhang C, Chen K, Cui Y. Mixing Assisted “Hot Spots” Occupying SERS Strategy for Highly Sensitive In Situ Study. Anal Chem 2018. [DOI: 10.1021/acs.analchem.7b04929] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Hui Lu
- Advanced Photonics Center, Southeast University, Nanjing, Jiangsu 210096, China
| | - Li Zhu
- Advanced Photonics Center, Southeast University, Nanjing, Jiangsu 210096, China
| | - Chuanlong Zhang
- Advanced Photonics Center, Southeast University, Nanjing, Jiangsu 210096, China
| | - Kexiang Chen
- Advanced Photonics Center, Southeast University, Nanjing, Jiangsu 210096, China
| | - Yiping Cui
- Advanced Photonics Center, Southeast University, Nanjing, Jiangsu 210096, China
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81
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Pan R, Yang Y, Wang Y, Li S, Liu Z, Su Y, Quan B, Li Y, Gu C, Li J. Nanocracking and metallization doubly defined large-scale 3D plasmonic sub-10 nm-gap arrays as extremely sensitive SERS substrates. NANOSCALE 2018; 10:3171-3180. [PMID: 29364303 DOI: 10.1039/c7nr08646f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Considering the technological difficulties in the existing approaches to form nanoscale gaps, a convenient method to fabricate three-dimensional (3D) sub-10 nm Ag/SiNx gap arrays has been demonstrated in this study, controlled by a combination of stress-induced nanocracking of a SiNx nanobridge and Ag nanofilm deposition. This scalable 3D plasmonic nanogap is specially suspended above a substrate, having a tunable nanogap width and large height-to-width ratio to form a nanocavity underneath. As a surface-enhanced Raman scattering (SERS) substrate, the 3D Ag/SiNx nanogap shows a large Raman enhancement factor of ∼108 and extremely high sensitivity for the detection of Rhodamine 6G (R6G) molecules, even down to 10-16 M, indicating an extraordinary capability for single-molecule detection. Further, we verified that the Fabry-Perot resonance occurred in the deep SiNx nanocavity under the Ag nanogap and contributed prominently to a tremendous enhancement of the local field in the Ag-nanogap zone and hence ultrasensitive SERS detection. This method circumvents the technological limitations to fabricate a sub-10 nm metal nanogap with unique features for wide applications in important scientific and technological areas.
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Affiliation(s)
- Ruhao Pan
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
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82
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Wang H, Huo Z, Zhang Z, Chen S, Jiang S. Optimization of Ag coated hydrogen silsesquioxane square array hybrid structure design for surface-enhanced Raman scattering substrate. OPTICS EXPRESS 2018; 26:1097-1107. [PMID: 29401988 DOI: 10.1364/oe.26.001097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 01/07/2018] [Indexed: 06/07/2023]
Abstract
A computer-automated design process for a surface-enhanced Raman scattering (SERS) substrate using a particle swarm optimization algorithm is proposed. Nanostructured Ag coated hydrogen silsesquioxane nanopillar arrays of various sizes for SERS substrate applications are fabricated by direct Ag film deposition on substrates patterned by electron beam lithography and are investigated systematically. Good agreement is demonstrated between experimental and simulation results. The absorption spectra, charge distributions, and electric field distributions are calculated using finite-difference time-domain simulations to explain the field enhancement mechanism and indicate that this enhancement originates from plasmon resonance. Our work provides a guide towards optimum SERS substrate design.
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83
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Cao W, Jiang L, Hu J, Wang A, Li X, Lu Y. Optical Field Enhancement in Au Nanoparticle-Decorated Nanorod Arrays Prepared by Femtosecond Laser and Their Tunable Surface-Enhanced Raman Scattering Applications. ACS APPLIED MATERIALS & INTERFACES 2018; 10:1297-1305. [PMID: 29256245 DOI: 10.1021/acsami.7b13241] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Various Au nanostructures have been demonstrated to have an enhanced local electric field around them because of surface plasmons. Herein, we propose a novel method for fabricating Au nanoparticle-decorated nanorod (NPDN) arrays through femtosecond laser irradiation combined with Au coating and annealing. The nanorod cavities strongly confined light and produced an enhanced optical field in response to Au nanoparticles (NPs) introduction. The nanogap and diameter of the fabricated Au NPs significantly affected the surface-enhanced Raman scattering (SERS) performance and could be simultaneously tuned with thickness-controllable Au films and substrate morphologies. The resulting Au NPDN substrate was observed to have efficient "hot spots" for tunable SERS applications. We experimentally determined that the enhancement factor of the Au NPDN substrate reached up to 8.3 × 107 at optimal parameters. Moreover, the Au NPDN substrate showed superior chemical stability, with the greatest intensity deviation of 3.2% on exposure to air for 2 months. This work provides a promising method to fabricate tunable plasmonic surfaces for highly sensitive, reproducible, and chemically stable SERS applications.
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Affiliation(s)
- Wei Cao
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China
| | - Lan Jiang
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China
- Laser Micro/Nano-Fabrication Laboratory, Department of Mechanical Engineering, Tsinghua University , Beijing 100084, P. R. China
| | - Jie Hu
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China
| | - Andong Wang
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China
| | - Xiaowei Li
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China
| | - Yongfeng Lu
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln , Lincoln, Nebraska 68588-0511, United States
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84
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Wu X, Hao C, Kumar J, Kuang H, Kotov NA, Liz-Marzán LM, Xu C. Environmentally responsive plasmonic nanoassemblies for biosensing. Chem Soc Rev 2018; 47:4677-4696. [DOI: 10.1039/c7cs00894e] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Assemblies of plasmonic nanoparticles enable new modalities for biosensing.
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Affiliation(s)
- Xiaoling Wu
- State Key Lab of Food Science and Technology
- Jiangnan University
- Wuxi
- People's Republic of China
- International Joint Research Laboratory for Biointerface and Biodetection
| | - Changlong Hao
- State Key Lab of Food Science and Technology
- Jiangnan University
- Wuxi
- People's Republic of China
- International Joint Research Laboratory for Biointerface and Biodetection
| | - Jatish Kumar
- CIC biomaGUNE and CIBER-BBN
- 20014 Donostia-San Sebastian
- Spain
| | - Hua Kuang
- State Key Lab of Food Science and Technology
- Jiangnan University
- Wuxi
- People's Republic of China
- International Joint Research Laboratory for Biointerface and Biodetection
| | - Nicholas A. Kotov
- Department of Chemical Engineering
- University of Michigan
- Ann Arbor
- USA
- Biointerfaces Institute, University of Michigan
| | - Luis M. Liz-Marzán
- CIC biomaGUNE and CIBER-BBN
- 20014 Donostia-San Sebastian
- Spain
- Ikerbasque
- Basque Foundation for Science
| | - Chuanlai Xu
- State Key Lab of Food Science and Technology
- Jiangnan University
- Wuxi
- People's Republic of China
- International Joint Research Laboratory for Biointerface and Biodetection
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85
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Wu Y, Li G, Camden JP. Probing Nanoparticle Plasmons with Electron Energy Loss Spectroscopy. Chem Rev 2017; 118:2994-3031. [DOI: 10.1021/acs.chemrev.7b00354] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yueying Wu
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Guoliang Li
- Center for Electron Microscopy, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Jon P. Camden
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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86
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Liu R, Li S, Liu JF. Self-assembly of plasmonic nanostructures into superlattices for surface-enhanced Raman scattering applications. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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87
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Tang B, Zeng T, Liu J, Zhou J, Ye Y, Wang X. Waste Fiber Powder Functionalized with Silver Nanoprism for Enhanced Raman Scattering Analysis. NANOSCALE RESEARCH LETTERS 2017; 12:341. [PMID: 28486798 PMCID: PMC5422221 DOI: 10.1186/s11671-017-2118-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
Biomass disks based on fine powder produced from disposed wool fibers were prepared for surface-enhanced Raman scattering (SERS). The wool powders (WPs) were modified by silver nanoprisms via an assembly method and then pressed into disks using a hydraulic laboratory pellet press. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to characterize the WPs and disks before and after treatment with silver nanoparticles (AgNPs). The WPs retained porous structures after treatment with AgNPs. The silver nanoprisms on WPs were observed clearly and the localized surface plasmon resonance (LSPR) properties of silver nanoprisms led to blue color of wool powder (WP). The obtained WP disks with AgNPs were confirmed to enhance greatly the Raman signal of thiram. The SERS disks are low-cost and convenient to use, with high sensitivity. The characteristic SERS bands of 10-8 M thiram can be identified from WP disks containing silver nanoparticles.
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Affiliation(s)
- Bin Tang
- National Engineering Laboratory for Advanced Yarn and Fabric Formation and Clean Production, Wuhan Textile University, Wuhan, 430073, China
- Institute for Frontier Materials, Deakin University, Geelong, Australia
| | - Tian Zeng
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China
| | - Jun Liu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China
| | - Ji Zhou
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.
| | - Yong Ye
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China
| | - Xungai Wang
- National Engineering Laboratory for Advanced Yarn and Fabric Formation and Clean Production, Wuhan Textile University, Wuhan, 430073, China.
- Institute for Frontier Materials, Deakin University, Geelong, Australia.
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88
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Zhao Y, Sun M, Ma W, Kuang H, Xu C. Biological Molecules-Governed Plasmonic Nanoparticle Dimers with Tailored Optical Behaviors. J Phys Chem Lett 2017; 8:5633-5642. [PMID: 29094951 DOI: 10.1021/acs.jpclett.7b01781] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Self-assembly opens new avenues to direct the organization of nanoparticles (NPs) into discrete structures with predefined configuration and association numbers. Plasmonic NP dimers provide a well-defined system for investigating the plasmonic coupling and electromagnetic (EM) interaction in arrays of NPs. The programmability and structural plasticity of biomolecules offers a convenient platform for constructing of NP dimers in a controllable way. Plasmonic coupling of NPs enables dimers to exhibit tunable optical properties, such as surface-enhanced Raman scattering (SERS), chirality, photoluminescence, and electrochemiluminescence (ECL) properties, which can be tailored by altering the biomolecules, the building blocks with distinct compositions, sizes and morphology, the interparticle distances, as well as the geometric configuration of the constituent NPs. An overview of recent developments in biological molecules-governed NP dimers, the tailored optical behaviors, and challenges in enhancing optical signals and proposing plasmonic biosensors are discussed in this Perspective.
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Affiliation(s)
- Yuan Zhao
- Key Lab of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, and ‡International Joint Research Laboratory for Biointerface and Biodetection, State Key Lab of Food Science and Technology , Wuxi, Jiangsu 214122, People's Republic of China
| | - Maozhong Sun
- Key Lab of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, and ‡International Joint Research Laboratory for Biointerface and Biodetection, State Key Lab of Food Science and Technology , Wuxi, Jiangsu 214122, People's Republic of China
| | - Wei Ma
- Key Lab of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, and ‡International Joint Research Laboratory for Biointerface and Biodetection, State Key Lab of Food Science and Technology , Wuxi, Jiangsu 214122, People's Republic of China
| | - Hua Kuang
- Key Lab of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, and ‡International Joint Research Laboratory for Biointerface and Biodetection, State Key Lab of Food Science and Technology , Wuxi, Jiangsu 214122, People's Republic of China
| | - Chuanlai Xu
- Key Lab of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, and ‡International Joint Research Laboratory for Biointerface and Biodetection, State Key Lab of Food Science and Technology , Wuxi, Jiangsu 214122, People's Republic of China
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89
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Zhang Y, Yang P, Habeeb Muhammed MA, Alsaiari SK, Moosa B, Almalik A, Kumar A, Ringe E, Khashab NM. Tunable and Linker Free Nanogaps in Core-Shell Plasmonic Nanorods for Selective and Quantitative Detection of Circulating Tumor Cells by SERS. ACS APPLIED MATERIALS & INTERFACES 2017; 9:37597-37605. [PMID: 28990755 DOI: 10.1021/acsami.7b10959] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Controlling the size, number, and shape of nanogaps in plasmonic nanostructures is of significant importance for the development of novel quantum plasmonic devices and quantitative sensing techniques such as surface-enhanced Raman scattering (SERS). Here, we introduce a new synthetic method based on coordination interactions and galvanic replacement to prepare core-shell plasmonic nanorods with tunable enclosed nanogaps. Decorating Au nanorods with Raman reporters that strongly coordinate Ag+ ions (e.g., 4-mercaptopyridine) afforded uniform nucleation sites to form a sacrificial Ag shell. Galvanic replacement of the Ag shell by HAuCl4 resulted in Au-AgAu core-shell structure with a uniform intra-nanoparticle gap. The size (length and width) and morphology of the core-shell plasmonic nanorods as well as the nanogap size depend on the concentration of the coordination complexes formed between Ag+ ions and 4-mercaptopyridine. Moreover, encapsulating Raman reporters within the nanogaps afforded an internal standard for sensitive and quantitative SERS analysis. To test the applicability, core-shell plasmonic nanorods were functionalized with aptamers specific to circulating tumor cells such as MCF-7 (Michigan Cancer Foundation-7, breast cancer cell line). This system could selectively detect as low as 20 MCF-7 cells in a blood mimicking fluid employing SERS. The linking DNA duplex on core-shell plasmonic nanorods can also intercalate hydrophobic drug molecules such as Doxorubicin, thereby increasing the versatility of this sensing platform to include drug delivery. Our synthetic method offers the possibility of developing multifunctional SERS-active materials with a wide range of applications including biosensing, imaging, and therapy.
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Affiliation(s)
- Yang Zhang
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Peng Yang
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Madathumpady Abubaker Habeeb Muhammed
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Shahad K Alsaiari
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Basem Moosa
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
| | - Abdulaziz Almalik
- Life Sciences and Environment Research Institute, Center of Excellence in Nanomedicine (CENM), King Abdulaziz City for Science and Technology (KACST) , Riyadh 11461, Saudi Arabia
| | | | | | - Niveen M Khashab
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia
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90
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Liu Y, Deng C, Yi D, Wang X, Tang Y, Wang Y. Silica nanowire assemblies as three-dimensional, optically transparent platforms for constructing highly active SERS substrates. NANOSCALE 2017; 9:15901-15910. [PMID: 28994840 DOI: 10.1039/c7nr06662g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Three-dimensional surface-enhanced Raman scattering (SERS) substrates are prepared via the in situ deposition of silver nanoparticles (AgNPs) on silica nanowire (SiO2 NW) assemblies, either in a free-standing membrane structure or as an optically transparent film supported on Scotch tape. The negatively charged surface of the SiO2 NW favors Ag+ ion enrichment around itself, with the ions forming densely deposited AgNPs on the NW after reducing agents are added to the solution. A SERS substrate with high sensitivity is achieved owing to abundant "hot spots" generated by the inter-AgNP gaps in the 3D geometry of the NW networks. The AgNP-deposited SiO2 NW membrane has a SERS enhancement factor of 2.9 × 108 and a detection limit of 10-9 M towards 4-mercaptopyridine probing and 10-8 M towards dithiocarbamate pesticide (i.e., thiram) probing. Moreover, the AgNP-deposited, Scotch tape-supported SiO2 NW film achieves non-invasive, direct detection of real-world surfaces due to its high sensitivity, high flexibility and optically transparent properties.
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Affiliation(s)
- Yinghua Liu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China.
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91
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Wang X, Zhu X, Chen Y, Zheng M, Xiang Q, Tang Z, Zhang G, Duan H. Sensitive Surface-Enhanced Raman Scattering Detection Using On-Demand Postassembled Particle-on-Film Structure. ACS APPLIED MATERIALS & INTERFACES 2017; 9:31102-31110. [PMID: 28832109 DOI: 10.1021/acsami.7b08818] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Highly sensitive and low-cost surface-enhanced Raman scattering (SERS) substrates are essential for practical applications of SERS. In this work, we report an extremely simple but effective approach to achieve sensitive SERS detection of molecules (down to 10-10 M) by using a particle/molecule/film sandwich configuration. Compared to conventional SERS substrates which are preprepared to absorb analyte molecules for detection, the proposed sandwich configuration is achieved by postassembling a flexible transparent gel tape embedded with plasmonic nanoparticles onto an Au film decorated with to-be-detected analyte molecules. In such a configuration, the individual plasmonic gel tape and Au film have low or no SERS activity but the final assembled sandwich structure shows strong SERS signal due to the formation of numerous hot spots at the particle-film interface, where the analyte molecules themselves serve as both spacer and signal probes. Because of its simple configuration, we demonstrate that the proposed SERS substrate can be obtained over a large area with extremely low cost. Particularly, because of the on-demand nature and the flexibility, such a postassembly strategy provides an ideal solution to detect the pesticide residue on fruit surfaces with significantly enhanced sensitivity.
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Affiliation(s)
| | | | | | - Mengjie Zheng
- Synergetic Innovation Center for Quantum Effects and Applications (SICQEA), Hunan Normal University , Changsha 410081, People's Republic of China
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92
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Oliverio M, Perotto S, Messina GC, Lovato L, De Angelis F. Chemical Functionalization of Plasmonic Surface Biosensors: A Tutorial Review on Issues, Strategies, and Costs. ACS APPLIED MATERIALS & INTERFACES 2017; 9:29394-29411. [PMID: 28796479 PMCID: PMC5593307 DOI: 10.1021/acsami.7b01583] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 08/10/2017] [Indexed: 05/21/2023]
Abstract
In an ideal plasmonic surface sensor, the bioactive area, where analytes are recognized by specific biomolecules, is surrounded by an area that is generally composed of a different material. The latter, often the surface of the supporting chip, is generally hard to be selectively functionalized, with respect to the active area. As a result, cross talks between the active area and the surrounding one may occur. In designing a plasmonic sensor, various issues must be addressed: the specificity of analyte recognition, the orientation of the immobilized biomolecule that acts as the analyte receptor, and the selectivity of surface coverage. The objective of this tutorial review is to introduce the main rational tools required for a correct and complete approach to chemically functionalize plasmonic surface biosensors. After a short introduction, the review discusses, in detail, the most common strategies for achieving effective surface functionalization. The most important issues, such as the orientation of active molecules and spatial and chemical selectivity, are considered. A list of well-defined protocols is suggested for the most common practical situations. Importantly, for the reported protocols, we also present direct comparisons in term of costs, labor demand, and risk vs benefit balance. In addition, a survey of the most used characterization techniques necessary to validate the chemical protocols is reported.
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Affiliation(s)
- Manuela Oliverio
- Department of Health
Science, University Magna Graecia of Catanzaro, Viale Europa−Loc. Germaneto, 88100 Catanzaro, Italy
- Italian Institute of Technology, Via Morego 30, 16163 Genova, Italy
| | - Sara Perotto
- Italian Institute of Technology, Via Morego 30, 16163 Genova, Italy
- Department of Informatics,
Bioengineering, Robotics and Systems Engineering (DIBRIS), Università degli Studi di Genova, Via Balbi 5, 16126 Genova, Italy
| | | | - Laura Lovato
- Italian Institute of Technology, Via Morego 30, 16163 Genova, Italy
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93
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Xie X, Pu H, Sun DW. Recent advances in nanofabrication techniques for SERS substrates and their applications in food safety analysis. Crit Rev Food Sci Nutr 2017; 58:2800-2813. [DOI: 10.1080/10408398.2017.1341866] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Xiaohui Xie
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
- Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods
| | - Hongbin Pu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
- Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
- Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods
- Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland
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94
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Chen X, Wang C, Yao Y, Wang C. Plasmonic Vertically Coupled Complementary Antennas for Dual-Mode Infrared Molecule Sensing. ACS NANO 2017; 11:8034-8046. [PMID: 28693314 DOI: 10.1021/acsnano.7b02687] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Here we report an infrared plasmonic nanosensor for label-free, sensitive, specific, and quantitative identification of nanometer-sized molecules. The device design is based on vertically coupled complementary antennas (VCCAs) with densely patterned hot-spots. The elevated metallic nanobars and complementary nanoslits in the substrate strongly couple at vertical nanogaps between them, resulting in dual-mode sensing dependent on the light polarization parallel or perpendicular to the nanobars. We demonstrate experimentally that a monolayer of octadecanethiol (ODT) molecules (thickness 2.5 nm) leads to significant antenna resonance wavelength shift over 136 nm in the parallel mode, corresponding to 7.5 nm for each carbon atom in the molecular chain or 54 nm for each nanometer in analyte thickness. Additionally, all four characteristic vibrational fingerprint signals, including the weak CH3 modes, are clearly delineated experimentally in both sensing modes. Such a dual-mode sensing with a broad wavelength design range (2.5 to 4.5 μm) is potentially useful for multianalyte detection. Additionally, we create a mathematical algorithm to design gold nanoparticles on VCCA sensors in simulation with their morphologies statistically identical to those in experiments and systematically investigate the impact of the nanoparticle morphology on the nanosensor performance. The nanoparticles form dense hot-spots, promote molecular adsorption, enhance near-field intensity 103 to 104 times, and improve ODT refractometric and fingerprint sensitivities. Our VCCA sensor structure offers a great design flexibility, dual-mode operation, and high detection sensitivity, making it feasible for broad applications from biomarker detection to environment monitoring and energy harvesting.
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Affiliation(s)
- Xiahui Chen
- School of Electrical, Computer and Energy Engineering, ‡The Center for Photonics Innovation, and §Biodesign Center for Molecular Design & Biomimetics, Arizona State University , Tempe, Arizona 85287, United States
| | - Chu Wang
- School of Electrical, Computer and Energy Engineering, ‡The Center for Photonics Innovation, and §Biodesign Center for Molecular Design & Biomimetics, Arizona State University , Tempe, Arizona 85287, United States
| | - Yu Yao
- School of Electrical, Computer and Energy Engineering, ‡The Center for Photonics Innovation, and §Biodesign Center for Molecular Design & Biomimetics, Arizona State University , Tempe, Arizona 85287, United States
| | - Chao Wang
- School of Electrical, Computer and Energy Engineering, ‡The Center for Photonics Innovation, and §Biodesign Center for Molecular Design & Biomimetics, Arizona State University , Tempe, Arizona 85287, United States
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95
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Rapid Surface Enhanced Raman Scattering (SERS) Detection of Sibutramine Hydrochloride in Pharmaceutical Capsules with a β-Cyclodextrin- Ag/Polyvivnyl Alcohol Hydrogel Substrate. SENSORS 2017; 17:s17071601. [PMID: 28698502 PMCID: PMC5539472 DOI: 10.3390/s17071601] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 06/17/2017] [Accepted: 06/20/2017] [Indexed: 11/16/2022]
Abstract
Sibutramine hydrochloride (SH) is a banned weight-loss drug, but its illegal addition to health products is still rampant. This suggests a very urgent need for a fast and precise detection method for SH. Surface Enhanced Raman Scattering (SERS) is a promising candidate for this purpose, but the weak affinity between SH and bare metal limits its direct SERS detection. In the present work, β-cyclodextrin was capped in situ onto the surface of Ag nanoparticles to function as a scaffold to capture SH. The obtained Ag nanoparticles were encapsulated into polyvinyl alcohol (PVA) to fabricate a SERS active hydrogel with excellent reproducibility. A facile SERS strategy based on such substrate was proposed for trace SH quantification with a linear range of 7.0–150.0 µg·mL–1, and a detection limit low to 3.0 µg·mL−1. It was applied to analyze seven types of commercial slimming capsules with satisfactory results, showing good prospect for real applications.
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96
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Time resolved and label free monitoring of extracellular metabolites by surface enhanced Raman spectroscopy. PLoS One 2017; 12:e0175581. [PMID: 28419111 PMCID: PMC5395151 DOI: 10.1371/journal.pone.0175581] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 03/28/2017] [Indexed: 11/20/2022] Open
Abstract
Metabolomics is an emerging field of cell biology that aims at the comprehensive identification of metabolite levels in biological fluids or cells in a specific functional state. Currently, the major tools for determining metabolite concentrations are mass spectrometry coupled with chromatographic techniques and nuclear magnetic resonance, which are expensive, time consuming and destructive for the samples. Here, we report a time resolved approach to monitor metabolite dynamics in cell cultures, based on Surface Enhanced Raman Scattering (SERS). This method is label-free, easy to use and provides the opportunity to simultaneously study a broad range of molecules, without the need to process the biological samples. As proof of concept, NIH/3T3 cells were cultured in vitro, and the extracellular medium was collected at different time points to be analyzed with our engineered SERS substrates. By identifying individual peaks of the Raman spectra, we showed the simultaneous detection of several components of the conditioned medium, such as L-tyrosine, L-tryptophan, glycine, L-phenylalanine, L-histidine and fetal bovine serum proteins, as well as their intensity changes during time. Furthermore, analyzing the whole Raman data set with the Principal Component Analysis (PCA), we demonstrated that the Raman spectra collected at different days of culture and clustered by similarity, described a well-defined trajectory in the principal component plot. This approach was then utilized to determine indirectly the functional state of the macrophage cell line Raw 264.7, stimulated with the lipopolysaccharide (LPS) for 24 hours. The collected spectra at different time points, clustered by the PCA analysis, followed a well-defined trajectory, corresponding to the functional change of cells toward the activated pro-inflammatory state induced by the LPS. This study suggests that our engineered SERS surfaces can be used as a versatile tool both for the characterization of cell culture conditions and the functional state of cells over time.
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97
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Zhao Y, Yang D, Li X, Liu Y, Hu X, Zhou D, Lu Y. Toward highly sensitive surface-enhanced Raman scattering: the design of a 3D hybrid system with monolayer graphene sandwiched between silver nanohole arrays and gold nanoparticles. NANOSCALE 2017; 9:1087-1096. [PMID: 27973628 DOI: 10.1039/c6nr06834k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report a novel graphene-metal hybrid system by introducing monolayer graphene between gold nanoparticles (Au NPs) and silver nanohole (Ag NH) arrays. The design incorporates three key advantages to promote the surface-enhanced Raman scattering (SERS) sensing capacity: (i) making full use of the single-atomic feature of graphene for generating uniform sub-nanometer spaces; (ii) maintaining the bottom layer of Ag nanoarrays with an ordered manner for facilitating the transfer of graphene films and assembly of the top layer of Au NPs; (iii) integrating the advantages of the strong plasmonic effect of Ag, the chemical stability of Au, as well as the mechanical flexibility and biological compatibility of graphene. In this configuration, the plasmonic properties can be fine-tuned by separately optimizing the horizontal or vertical gaps between the metal NPs. Exactly, sub-20 nm spaces between the horizontally patterned Ag tips constructed by adjacent Ag NHs, and sub-nanometer scale graphene gaps between the vertically distributed Au NP-Ag NH have been achieved. Finite element numerical simulations demonstrate that the multi-dimensional plasmonic couplings (including the Au NP-Au NP, Au NP-Ag NH and Ag NH-Ag NH couplings) promote for the hybrid platform an electric field enhancement up to 137 times. Impressively, the as-prepared 3D Au NP-graphene-Ag NH array hybrid structure manifests ultrahigh SERS sensitivity with a detection limit of 10-13 M for R6G molecules, as well as good reproducibility and stability. This work represents a step towards high-performance SERS substrate fabrication, and opens up a new route for graphene-plasmonic hybrids in SERS applications.
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Affiliation(s)
- Yuan Zhao
- School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China. and School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, China.
| | - Dong Yang
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, China.
| | - Xiyu Li
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, China.
| | - Yu Liu
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, China.
| | - Xiang Hu
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China
| | - Dianfa Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China
| | - Yalin Lu
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, China. and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China and Laser Optics Research Center, Physics Department, United States Air Force Academy, Colorado 80840, USA
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98
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Cai Z, Yan Y, Liu L, Lin S, Hu X. Controllable fabrication of metallic photonic crystals for ultra-sensitive SERS and photodetectors. RSC Adv 2017. [DOI: 10.1039/c7ra11721c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Metallic photonic crystals with strong light harvesting capabilities for SERS and photodetectors.
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Affiliation(s)
- Zihe Cai
- State Key Laboratory of Metal Matrix Composites
- Shanghai JiaoTong University
- Shanghai 200240
- People’s Republic of China
| | - Yang Yan
- State Key Laboratory of Metal Matrix Composites
- Shanghai JiaoTong University
- Shanghai 200240
- People’s Republic of China
| | - Lin Liu
- State Key Laboratory of Metal Matrix Composites
- Shanghai JiaoTong University
- Shanghai 200240
- People’s Republic of China
| | - Shengxuan Lin
- State Key Laboratory of Metal Matrix Composites
- Shanghai JiaoTong University
- Shanghai 200240
- People’s Republic of China
| | - Xiaobin Hu
- State Key Laboratory of Metal Matrix Composites
- Shanghai JiaoTong University
- Shanghai 200240
- People’s Republic of China
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99
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Jin Q, Zhang C, Zhang J, Yuan Y, Xu M, Yao J. In situ construction of polymer-encapsulated Au nanoparticle dimers based on a C–C coupling reaction. RSC Adv 2017. [DOI: 10.1039/c7ra03942e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
A polymer-encapsulated Au nanoparticle dimer was fabricated via C–C coupling reaction. The strong effect of LSPR, SERS and SPR catalysis were observed in the gap. It is expected to provide rich information for understanding SERS mechanism.
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Affiliation(s)
- Qi Jin
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Chenjie Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Jing Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Yaxian Yuan
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Minmin Xu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Jianlin Yao
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
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100
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Nanoplasmonic and Microfluidic Devices for Biological Sensing. NATO SCIENCE FOR PEACE AND SECURITY SERIES B: PHYSICS AND BIOPHYSICS 2017. [DOI: 10.1007/978-94-024-0850-8_12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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