151
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Ferhan AR, Jackman JA, Park JH, Cho NJ, Kim DH. Nanoplasmonic sensors for detecting circulating cancer biomarkers. Adv Drug Deliv Rev 2018; 125:48-77. [PMID: 29247763 DOI: 10.1016/j.addr.2017.12.004] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 09/29/2017] [Accepted: 12/08/2017] [Indexed: 12/20/2022]
Abstract
The detection of cancer biomarkers represents an important aspect of cancer diagnosis and prognosis. Recently, the concept of liquid biopsy has been introduced whereby diagnosis and prognosis are performed by means of analyzing biological fluids obtained from patients to detect and quantify circulating cancer biomarkers. Unlike conventional biopsy whereby primary tumor cells are analyzed, liquid biopsy enables the detection of a wide variety of circulating cancer biomarkers, including microRNA (miRNA), circulating tumor DNA (ctDNA), proteins, exosomes and circulating tumor cells (CTCs). Among the various techniques that have been developed to detect circulating cancer biomarkers, nanoplasmonic sensors represent a promising measurement approach due to high sensitivity and specificity as well as ease of instrumentation and operation. In this review, we discuss the relevance and applicability of three different categories of nanoplasmonic sensing techniques, namely surface plasmon resonance (SPR), localized surface plasmon resonance (LSPR) and surface-enhanced Raman scattering (SERS), for the detection of different classes of circulating cancer biomarkers.
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Affiliation(s)
- Abdul Rahim Ferhan
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Joshua A Jackman
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Jae Hyeon Park
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Nam-Joon Cho
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
| | - Dong-Hwan Kim
- School of Chemical Engineering, Sungkyunkwan University, 16419, Republic of Korea.
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152
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Gu LJ, Ma CL, Zhang XH, Zhang W, Cong S, Zhao ZG. Populating surface-trapped electrons towards SERS enhancement of W18O49 nanowires. Chem Commun (Camb) 2018; 54:6332-6335. [DOI: 10.1039/c8cc03880e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The population of surface-trapped electrons determines the SERS performance of a W18O49 substrate, as proved by construction of metal–semiconductor or organic–semiconductor interfaces.
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Affiliation(s)
- Ling-Jun Gu
- Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application
- School of Mathematics and Physics
- Suzhou University of Science and Technology
- Suzhou
- China
| | - Chun-Lan Ma
- Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application
- School of Mathematics and Physics
- Suzhou University of Science and Technology
- Suzhou
- China
| | - Xiao-Hua Zhang
- Key Laboratory of Nano-Devices and Applications
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
- China
| | - Wei Zhang
- Chongqing Institute of Green and Intelligent Technology
- Chinese Academy of Sciences
- Chongqing 400714
- China
| | - Shan Cong
- Key Laboratory of Nano-Devices and Applications
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
- China
| | - Zhi-Gang Zhao
- Key Laboratory of Nano-Devices and Applications
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou 215123
- China
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153
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Martín-Yerga D, Pérez-Junquera A, González-García MB, Hernández-Santos D, Fanjul-Bolado P. Towards single-molecule in situ electrochemical SERS detection with disposable substrates. Chem Commun (Camb) 2018; 54:5748-5751. [DOI: 10.1039/c8cc02069h] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Nanostructure and surface charge can be tuned during the electrochemical activation of SERS substrates achieving highly active surfaces with feasible detection of a few molecules.
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154
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Sun M, Xu L, Bahng JH, Kuang H, Alben S, Kotov NA, Xu C. Intracellular localization of nanoparticle dimers by chirality reversal. Nat Commun 2017; 8:1847. [PMID: 29185441 PMCID: PMC5707389 DOI: 10.1038/s41467-017-01337-2] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 09/11/2017] [Indexed: 01/01/2023] Open
Abstract
The intra- and extracellular positioning of plasmonic nanoparticles (NPs) can dramatically alter their curative/diagnostic abilities and medical outcomes. However, the inability of common spectroscopic identifiers to register the events of transmembrane transport denies their intracellular vs. extracellular localization even for cell cultures. Here we show that the chiroptical activity of DNA-bridged NP dimers allows one to follow the process of internalization of the particles by the mammalian cells and to distinguish their extra- vs intra-cellular localizations by real-time spectroscopy in ensemble. Circular dichroism peaks in the visible range change from negative to positive during transmembrane transport. The chirality reversal is associated with a spontaneous twisting motion around the DNA bridge caused by the large change in electrostatic repulsion between NPs when the dimers move from interstitial fluid to cytosol. This finding opens the door for spectroscopic targeting of plasmonic nanodrugs and quantitative assessment of nanoscale interactions. The efficacy of dichroic targeting of chiral nanostructures for biomedical applications is exemplified here as photodynamic therapy of malignancies. The efficacy of cervical cancer cell elimination was drastically increased when circular polarization of incident photons matched to the preferential absorption of dimers localized inside the cancer cells, which is associated with the increased generation of reactive oxygen species and their preferential intracellular localization. The ability to spectroscopically pinpoint whether nanoparticles are located inside or outside of cells represents an overarching need in biology and medicine. Here, the authors show that the chirality of DNA-bridged particle dimers reverses when they cross the cell membrane, providing a real-time chiroptical signature of their intra- or extracellular location.
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Affiliation(s)
- Maozhong Sun
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.,International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, 214122, China
| | - Liguang Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.,International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, 214122, China
| | - Joong Hwan Bahng
- Chemical Engineering Department, University of Michigan, Ann Arbor, MI, 48109, USA.,Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Hua Kuang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China. .,International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, 214122, China.
| | - Silas Alben
- Department of Mathematics, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Nicholas A Kotov
- Chemical Engineering Department, University of Michigan, Ann Arbor, MI, 48109, USA. .,Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA. .,Department of Material Sciences and Engineering, University of Michigan, Ann Arbor, MI, 48109, USA. .,Michigan Center for Integrative Research in Critical Care, Ann Arbor, MI, 48109, USA. .,Biointerfaces Institute, University of Michigan, Ann Arbor, MI, 48109, USA.
| | - Chuanlai Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.,International Joint Research Laboratory for Biointerface and Biodetection, Jiangnan University, Wuxi, 214122, China
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155
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Lee S, Wy Y, Lee YW, Ham K, Han SW. Core-Shell Nanoparticle Clusters Enable Synergistic Integration of Plasmonic and Catalytic Functions in a Single Platform. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1701633. [PMID: 28902979 DOI: 10.1002/smll.201701633] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 07/15/2017] [Indexed: 06/07/2023]
Abstract
Designing controlled hybrid nanoarchitectures between plasmonic and catalytic materials is of paramount importance to fully exploit each function of constituent materials. This study reports a new synthetic strategy for the realization of colloidal clusters of core-shell nanoparticles with plasmonic cores and catalytically active shells. The Au@M (M = Pd or Pt) nanoparticle clusters (NPCs) with a high density of sub-1 nm interparticle gaps are successfully prepared by the deposition of M shells onto thermally activated Au NPCs. NPCs with other metal, metal sulfide, and metal oxide shells can also be synthesized by using the present approach. The prepared Au@M NPCs show remarkably enhanced plasmonic performance compared to their Au@M nanoparticle counterparts due to the localization of a strong electromagnetic field at the interparticle gaps, while the inherent catalytic function of shells is intact. In situ real-time Raman spectroscopy and plasmon-enhanced electrocatalysis experiments demonstrate that the controlled assembly of core-shell nanoparticles is a very effective route for the synergistic integration of plasmonic and catalytic functions in a single platform.
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Affiliation(s)
- Seunghoon Lee
- Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
| | - Younghyun Wy
- Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
| | - Young Wook Lee
- Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
| | - Kyungrok Ham
- Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
| | - Sang Woo Han
- Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
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156
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Li H, Men D, Sun Y, Liu D, Li X, Li L, Li C, Cai W, Li Y. Surface enhanced Raman scattering properties of dynamically tunable nanogaps between Au nanoparticles self-assembled on hydrogel microspheres controlled by pH. J Colloid Interface Sci 2017. [DOI: 10.1016/j.jcis.2017.06.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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157
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Roy A, Maiti A, Chini TK, Satpati B. Annealing Induced Morphology of Silver Nanoparticles on Pyramidal Silicon Surface and Their Application to Surface-Enhanced Raman Scattering. ACS APPLIED MATERIALS & INTERFACES 2017; 9:34405-34415. [PMID: 28901125 DOI: 10.1021/acsami.7b08493] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
This paper reports on a simple and cost-effective process of developing a stable surface-enhanced Raman scattering (SERS) substrate based on silver (Ag) nanoparticles deposited on silicon (Si) surface. Durability is an important issue for preparing SERS active substrate as silver nanostructures are prone to rapid surface oxidation when exposed to ambient conditions, which may result in the loss of the enhancement capabilities in a short period of time. Here, we employ the galvanic displacement method to produce Ag nanoparticles on Si(100) substrate prepatterned with arrays of micropyramids by chemical etching, and subsequently, separate pieces of such substrates were annealed in oxygen and nitrogen environments at 550 °C. Interestingly, while nitrogen-annealed Si substrates were featured by spherical-shaped Ag particles, the oxygen annealed Si substrates were dominated by the formation of triangular shape particles attached with the spherical one. Remarkably, the oxygen-annealed substrate thus produced shows very high SERS enhancement compared to the either unannealed or nitrogen annealed substrate. The hitherto unobserved coexistence of triangular morphology with the spherical one and the gap between the two (source of efficient hot-spots) are the origin of enhanced SERS activity for the oxygen-annealed Ag particle-covered Si substrate as probed by the combined finite-difference time domain (FDTD) simulation and cathodoluminesensce (CL) experiment. As the substrate has already been annealed in an oxygen environment, further probability of oxidation is reduced in the present synthesis protocol that paves the way for making a novel long-lived thermally stable SERS substrate.
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Affiliation(s)
- Abhijit Roy
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics , HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - Arpan Maiti
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics , HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - Tapas Kumar Chini
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics , HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - Biswarup Satpati
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics , HBNI, 1/AF Bidhannagar, Kolkata 700064, India
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158
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Wang M, Hartmann G, Wu Z, Scarabelli L, Rajeeva BB, Jarrett JW, Perillo EP, Dunn AK, Liz-Marzán LM, Hwang GS, Zheng Y. Controlling Plasmon-Enhanced Fluorescence via Intersystem Crossing in Photoswitchable Molecules. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:10.1002/smll.201701763. [PMID: 28834225 PMCID: PMC5866054 DOI: 10.1002/smll.201701763] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 07/10/2017] [Indexed: 05/19/2023]
Abstract
By harnessing photoswitchable intersystem crossing (ISC) in spiropyran (SP) molecules, active control of plasmon-enhanced fluorescence in the hybrid systems of SP molecules and plasmonic nanostructures is achieved. Specifically, SP-derived merocyanine (MC) molecules formed by photochemical ring-opening reaction display efficient ISC due to their zwitterionic character. In contrast, ISC in quinoidal MC molecules formed by thermal ring-opening reaction is negligible. The high ISC rate can improve fluorescence quantum yield of the plasmon-modified spontaneous emission, only when the plasmonic electromagnetic field enhancement is sufficiently high. Along this line, extensive photomodulation of fluorescence is demonstrated by switching the ISC in MC molecules at Au nanoparticle aggregates, where strongly enhanced plasmonic hot spots exist. The ISC-mediated plasmon-enhanced fluorescence represents a new approach toward controlling the spontaneous emission of fluorophores near plasmonic nanostructures, which expands the applications of active molecular plasmonics in information processing, biosensing, and bioimaging.
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Affiliation(s)
- Mingsong Wang
- Department of Mechanical Engineering, Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Gregory Hartmann
- Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Zilong Wu
- Department of Mechanical Engineering, Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Leonardo Scarabelli
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20014, Donostia-San Sebastián, Spain
- Department of Chemistry and Biochemistry, California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Bharath Bangalore Rajeeva
- Department of Mechanical Engineering, Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Jeremy W Jarrett
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Evan P Perillo
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Andrew K Dunn
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Luis M Liz-Marzán
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20014, Donostia-San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48013, Bilbao, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 20014, Donostia- San Sebastián, Spain
| | - Gyeong S Hwang
- Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Yuebing Zheng
- Department of Mechanical Engineering, Texas Materials Institute, The University of Texas at Austin, Austin, TX, 78712, USA
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159
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Kamińska A, Sprynskyy M, Winkler K, Szymborski T. Ultrasensitive SERS immunoassay based on diatom biosilica for detection of interleukins in blood plasma. Anal Bioanal Chem 2017; 409:6337-6347. [PMID: 28852782 PMCID: PMC5641273 DOI: 10.1007/s00216-017-0566-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 07/07/2017] [Accepted: 08/02/2017] [Indexed: 01/29/2023]
Abstract
An ultrasensitive surface-enhanced Raman scattering (SERS) immunoassay based on diatom biosilica with integrated gold nanoparticles (AuNPs) for the detection of interleukin 8 (IL-8) in blood plasma has been developed. The SERS sensing originates from unique features of the diatom frustules, which are capable of enhancing the localized surface-plasmon resonance of metal nanostructures. The SERS immune tags ware fabricated by functionalizing 70-nm Au nanoparticles with DTNB (i.e., 5,5′-dithiobis(2-nitrobenzoic acid)), which acted as a Raman reporter molecule, as well as the specific antibodies. These DTNB-labeled immune-AuNPs can form a sandwich structure with IL-8 antigens (infection marker) and the antibodies immobilized on the biosilica material. Our method showed an improved IL-8 detection limit in comparison to standard ELISA methods. The current detection limit for IL-8 using a conventional ELISA test is about 15.6 pg mL−1. The lower detection limit for IL-8 in blood plasma was estimated to be 6.2 pg mL−1. To the best of our knowledge, this is the first report on the recognition of IL-8 in human samples using a SERS-based method. This method clearly possesses high sensitivity to clinically relevant interleukin concentrations in body fluids. The average relative standard deviation of this method is less than 8%, which is sufficient for analytical analysis and comparable to those of classical ELISA methods. This SERS immunoassay also exhibits high biological specificity for the detection of IL-8 antigens. The established SERS immunoassay offers a valuable platform for the ultrasensitive and highly specific detection of immune biomarkers in a clinical setting for medical diagnostics. The SERS-based immunoassay based on naturally generated photonic biosilica for the detection of interleukin 8 (IL-8) in human plasma samples ![]()
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Affiliation(s)
- Agnieszka Kamińska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland.
| | - Myroslav Sprynskyy
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, 7 Gagarina Str, 87-100, Toruń, Poland
| | - Katarzyna Winkler
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Tomasz Szymborski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
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160
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Wang F, Gu X, Zheng C, Dong F, Zhang L, Cai Y, You Z, You J, Du S, Zhang Z. Ehrlich Reaction Evoked Multiple Spectral Resonances and Gold Nanoparticle Hotspots for Raman Detection of Plant Hormone. Anal Chem 2017; 89:8836-8843. [DOI: 10.1021/acs.analchem.7b01267] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Fangyuan Wang
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Xiaoling Gu
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Chunchen Zheng
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Fang Dong
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Liying Zhang
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Yueqing Cai
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Zhengyi You
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Junhui You
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Shuhu Du
- School
of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Zhongping Zhang
- School
of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui 230601, China
- State
Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, China
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161
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Zhang Y, Shen J, Xie Z, Dou X, Min C, Lei T, Liu J, Zhu S, Yuan X. Dynamic plasmonic nano-traps for single molecule surface-enhanced Raman scattering. NANOSCALE 2017; 9:10694-10700. [PMID: 28678267 DOI: 10.1039/c7nr02406a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Intense electric fields at the nanoscale are essential for single molecule surface-enhanced Raman scattering (SERS) detection. Such fields can be achieved in plasmonic nano-gaps between nanoparticles and metal films through hybridization of surface plasmons. The nano-gaps could be formed and dynamically controlled by using plasmonic tweezers; however, the aggregation of particles in the plasmonic field degrades each particle's enhancement and spoils the nanosized-spatial resolution. Here, dual-plasmonic tweezers are proposed and demonstrated to accurately control the number of nano-gaps and enhancement by tailoring a crater-shaped potential well in the nano-trap system. As the electric field in the nano-gap is intense, SERS spectral signatures of a single molecular level are probed simultaneously. These advantages point towards the implementation of enhanced Raman spectra, and broad applications in optical molecular detection.
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Affiliation(s)
- Yuquan Zhang
- Nanophotonics Research Centre, Shenzhen University, Shenzhen 518060, China.
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162
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Shan F, Zhang XY, Fu XC, Zhang LJ, Su D, Wang SJ, Wu JY, Zhang T. Investigation of simultaneously existed Raman scattering enhancement and inhibiting fluorescence using surface modified gold nanostars as SERS probes. Sci Rep 2017; 7:6813. [PMID: 28754959 PMCID: PMC5533772 DOI: 10.1038/s41598-017-07311-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 06/27/2017] [Indexed: 11/16/2022] Open
Abstract
One of the main challenges for highly sensitive surface-enhanced Raman scattering (SERS) detection is the noise interference of fluorescence signals arising from the analyte molecules. Here we used three types of gold nanostars (GNSs) SERS probes treated by different surface modification methods to reveal the simultaneously existed Raman scattering enhancement and inhibiting fluorescence behaviors during the SERS detection process. As the distance between the metal nanostructures and the analyte molecules can be well controlled by these three surface modification methods, we demonstrated that the fluorescence signals can be either quenched or enhanced during the detection. We found that fluorescence quenching will occur when analyte molecules are closely contacted to the surface of GNSs, leading to a ~100 fold enhancement of the SERS sensitivity. An optimized Raman signal detection limit, as low as the level of 10-11 M, were achieved when Rhodamine 6 G were used as the analyte. The presented fluorescence-free GNSs SERS substrates with plentiful hot spots and controllable surface plasmon resonance wavelengths, fabricated using a cost-effective self-assembling method, can be very competitive candidates for high-sensitive SERS applications.
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Affiliation(s)
- Feng Shan
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China
- Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, and School of Instrument Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China
- Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute of Southeast University, Suzhou, 215123, People's Republic of China
| | - Xiao-Yang Zhang
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China
- Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, and School of Instrument Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China
- Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute of Southeast University, Suzhou, 215123, People's Republic of China
| | - Xing-Chang Fu
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China
- Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute of Southeast University, Suzhou, 215123, People's Republic of China
| | - Li-Jiang Zhang
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China
- Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute of Southeast University, Suzhou, 215123, People's Republic of China
| | - Dan Su
- Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, and School of Instrument Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China
- Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute of Southeast University, Suzhou, 215123, People's Republic of China
| | - Shan-Jiang Wang
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China
- Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute of Southeast University, Suzhou, 215123, People's Republic of China
| | - Jing-Yuan Wu
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China
- Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute of Southeast University, Suzhou, 215123, People's Republic of China
| | - Tong Zhang
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China.
- Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology, Ministry of Education, and School of Instrument Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China.
- Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute of Southeast University, Suzhou, 215123, People's Republic of China.
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163
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Shanta PV, Cheng Q. Graphene Oxide Nanoprisms for Sensitive Detection of Environmentally Important Aromatic Compounds with SERS. ACS Sens 2017; 2:817-827. [PMID: 28723120 DOI: 10.1021/acssensors.7b00182] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Recent advances in graphene-based sensors have shown that heavily oxidized (GO) and reduced graphene oxide (rGO) are attractive materials for environmental sensing due to their unique chemical and physical properties. We describe here the fabrication of nanostructured GO assemblies with Ag nanoprisms for improved detection with surface enhanced Raman scattering (SERS). Specifically, 100-μm-sized, periodic-nanoprism-array domains were fabricated on top of the GO layers by GO-assisted lithography (GOAL). The atomically thin GO underlayers are shown to attract cyclic aromatic molecules to the surface, likely via π-π stacking interactions. The close proximity of the analyte to GO and nanoprism (NP) tips effectively suppresses fluorescent background and affords a plausible tertiary enhancement of photon emissions via an electron charge transfer (CT) process. The adsorption of analyte to rGO-NP leads to the appearance and/or shift of several Raman bands, which provided a means to gain molecular insights into the graphene-enhanced scattering process. The analytical merits were characterized with model compound Rhodamine 6G, where the detection limit could reach subnanomolar concentrations. The nanoprism GO substrates also prove effective for SERS multiplex measurement of several legacy aromatic pollutants. Three tetrachlorobiphenyl isomers could be identified from a mixture using their autonomous nonoverlapping molecular fingerprints, and the substrate offers remarkable trace detection of 2,2',3,3'-tetrachlorobiphenyl (PCB-77).
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Affiliation(s)
- Peter V. Shanta
- Environmental
Toxicology and ‡Department of Chemistry University of California, Riverside, California 92521, United States
| | - Quan Cheng
- Environmental
Toxicology and ‡Department of Chemistry University of California, Riverside, California 92521, United States
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164
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Fast and green synthesis of silver nanoparticles/reduced graphene oxide composite as efficient surface-enhanced Raman scattering substrate for bacteria detection. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-017-1990-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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165
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Kim DJ, Jeon TY, Park SG, Han HJ, Im SH, Kim DH, Kim SH. Uniform Microgels Containing Agglomerates of Silver Nanocubes for Molecular Size-Selectivity and High SERS Activity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13. [PMID: 28464428 DOI: 10.1002/smll.201604048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 02/17/2017] [Indexed: 05/07/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is a promising technique for molecular analysis as the molecular fingerprints (Raman spectra) are amplified to detectable levels compared with common spectroscopy. Metal nanostructures localize electromagnetic field on their surfaces, which can lead to dramatic increase of Raman intensity of molecules adsorbed. However, the metal surfaces are prone to contamination, thereby requiring pretreatment of samples to remove adhesive molecules. To avoid the pretreatment and potentially achieve point-of-care (POC) analysis, we have developed SERS-active microgels using the droplet-microfluidic system. As the microgels are composed of water-swollen network with consistent mesh size, they selectively allow diffusion of molecules smaller than the mesh, thereby excluding large adhesives. To render the microgels highly SERS-active, we destabilize silver nanocubes to form agglomerates, which are embedded in the matrix of microgels. The nanogaps in the agglomerates provide high sensitivity in Raman measurement and size-selective permeability of the microgel matrix obviates the pretreatment of samples. To validate the functions, we demonstrate the direct detection of Aspirin dissolved in whole blood without any pretreatment.
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Affiliation(s)
- Dong Jae Kim
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, Daejeon, 305-701, Korea
| | - Tae Yoon Jeon
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, Daejeon, 305-701, Korea
| | - Sung-Gyu Park
- Advanced Functional Thin Films Department, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam, 641-831, Korea
| | - Hye Ji Han
- Functional Crystallization Center (ERC), Department of Chemical Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do, 446-701, Republic of Korea
| | - Sang Hyuk Im
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 136-713, Republic of Korea
| | - Dong-Ho Kim
- Advanced Functional Thin Films Department, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam, 641-831, Korea
| | - Shin-Hyun Kim
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, Daejeon, 305-701, Korea
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166
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Moody AS, Baghernejad PC, Webb KR, Sharma B. Surface Enhanced Spatially Offset Raman Spectroscopy Detection of Neurochemicals Through the Skull. Anal Chem 2017; 89:5688-5692. [DOI: 10.1021/acs.analchem.7b00985] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Amber S. Moody
- Department
of Chemistry, University of Tennessee Knoxville, 1420 Circle Drive, Knoxville, Tennessee 37996, United States
| | - Peymon C. Baghernejad
- Department
of Chemistry, University of Tennessee Knoxville, 1420 Circle Drive, Knoxville, Tennessee 37996, United States
| | - Kelsey R. Webb
- Department
of Chemistry, University of Virginia−Wise, 1 College Avenue, Wise, Virginia 24293, United States
| | - Bhavya Sharma
- Department
of Chemistry, University of Tennessee Knoxville, 1420 Circle Drive, Knoxville, Tennessee 37996, United States
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167
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Zhou W, Li Q, Liu H, Yang J, Liu D. Building Electromagnetic Hot Spots in Living Cells via Target-Triggered Nanoparticle Dimerization. ACS NANO 2017; 11:3532-3541. [PMID: 28264152 DOI: 10.1021/acsnano.7b00531] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Electromagnetic hot spots of surface-enhanced Raman scattering have been extensively employed for bioanalysis in solution or on a substrate, but building hot spots in living systems for probing targets of interest has not been achieved yet because of the complex and dynamic physiological environment. Herein, we show that a target-programmed nanoparticle dimerization can be combined with the background-free Raman reporters (alkyne, C≡C; nitrile, C≡N) for multiplexed imaging of microRNAs (miRNAs) in living cells. The in situ formation of plasmonic dimers results in an intense hot spot, thus dramatically enhancing the Raman signals of the reporters residing in the hot spot. More significantly, the reporters exhibit single nonoverlapping peaks in the cellular Raman-silent region (1800-2800 cm-1), thus eliminating spectral unmixing and background interference. A 3D Raman mapping technique was harnessed to monitor the spatial distribution of the dimers and thus the multiple miRNAs in cells. This approach could be extended to probe other biomarkers of interest for monitoring specific pathophysiological events at the live-cell level.
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Affiliation(s)
- Wen Zhou
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University , Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, China
| | - Qiang Li
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University , Tianjin 300071, China
| | - Huiqiao Liu
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University , Tianjin 300071, China
| | - Jie Yang
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University , Tianjin 300071, China
| | - Dingbin Liu
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University , Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, China
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168
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Lloyd JA, Ng SH, Liu ACY, Zhu Y, Chao W, Coenen T, Etheridge J, Gómez DE, Bach U. Plasmonic Nanolenses: Electrostatic Self-Assembly of Hierarchical Nanoparticle Trimers and Their Response to Optical and Electron Beam Stimuli. ACS NANO 2017; 11:1604-1612. [PMID: 28165711 DOI: 10.1021/acsnano.6b07336] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Asymmetric nanoparticle trimers composed of particles with increasing diameter act as "plasmonic lenses" and have been predicted to exhibit ultrahigh confinement of electromagnetic energy in the space between the two smallest particles. Here we present an electrostatic self-assembly approach for creating gold nanoparticle trimers with an assembly yield of over 60%. We demonstrate that the trimer assembly leads to characteristic red-shifts and show the localization of the relevant plasmon modes by means of cathodoluminescence and electron energy loss spectroscopy. The results are analyzed in terms of surface plasmon hybridization.
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Affiliation(s)
- Julian A Lloyd
- Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia
- Melbourne Centre for Nanofabrication , Wellington Road 151, Clayton, Victoria 3168, Australia
| | - Soon Hock Ng
- Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia
- Melbourne Centre for Nanofabrication , Wellington Road 151, Clayton, Victoria 3168, Australia
| | - Amelia C Y Liu
- Monash Centre for Electron Microscopy, Monash University , Clayton, Victoria 3800, Australia
- School of Physics, Monash University , Clayton, Victoria 3800, Australia
| | - Ye Zhu
- Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia
| | - Wei Chao
- Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia
| | - Toon Coenen
- DELMIC BV , Thijsseweg 11, 2629 JA, Delft, The Netherlands
| | - Joanne Etheridge
- Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia
- Monash Centre for Electron Microscopy, Monash University , Clayton, Victoria 3800, Australia
| | - Daniel E Gómez
- Melbourne Centre for Nanofabrication , Wellington Road 151, Clayton, Victoria 3168, Australia
- Commonwealth Scientific and Industrial Research Organisation , Manufacturing, Research Way, Clayton, Victoria 3168, Australia
- School of Applied Science, RMIT University , Melbourne, Victoria 3000, Australia
| | - Udo Bach
- Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia
- Melbourne Centre for Nanofabrication , Wellington Road 151, Clayton, Victoria 3168, Australia
- Commonwealth Scientific and Industrial Research Organisation , Manufacturing, Research Way, Clayton, Victoria 3168, Australia
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169
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Zhao Q, Liu G, Zhang H, Zhou F, Li Y, Cai W. SERS-based ultrasensitive detection of organophosphorus nerve agents via substrate's surface modification. JOURNAL OF HAZARDOUS MATERIALS 2017; 324:194-202. [PMID: 28340991 DOI: 10.1016/j.jhazmat.2016.10.049] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 09/27/2016] [Accepted: 10/22/2016] [Indexed: 05/08/2023]
Abstract
Highly efficient detection of the organicphosphor nerve agents such as sarin and soman, based on surface enhanced Raman scattering (SERS) effect, has been in challenge due to their weak adsorption property on coin metals. In this paper, a new strategy is presented to achieve the SERS-based ultrasensitive detection of sarin-simulated agent methanephosphonic acid (MPA) via the surface modification of SERS-substrates. The Au-coated Si nanocone array is surface-modified with 2-aminoethanethiol and used as SERS-substrate for detection of MPA. It has been shown that the modified substrate could preferentially capture MPA molecules in the solution with coupling agent and induce amidation reaction. The reaction products are still bound or anchor on the substrate's surface. The MPA molecules can thus be detected by Raman spectral measurement of the solution-soaked SERS-substrate. The minimum detection level is down to ∼1ppb. The Raman peak intensity versus the MPA concentration is subject to a linear double logarithmic relation from ∼1ppb to ∼1000ppm, which is attributed to Freundlich adsorption of MPA on the surface-modified SERS substrate. This study provides a new way for the highly efficient SERS-based detection of the organophosphorus nerve agents and some other target molecules weakly interacted with metal substrates.
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Affiliation(s)
- Qian Zhao
- Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China; University of Science and Technology of China, Hefei 230026, PR China
| | - Guangqiang Liu
- Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China.
| | - Hongwen Zhang
- Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China
| | - Fei Zhou
- Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China
| | - Yue Li
- Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China
| | - Weiping Cai
- Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, PR China; University of Science and Technology of China, Hefei 230026, PR China.
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170
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Polisetti S, Baig NF, Morales-Soto N, Shrout JD, Bohn PW. Spatial Mapping of Pyocyanin in Pseudomonas Aeruginosa Bacterial Communities Using Surface Enhanced Raman Scattering. APPLIED SPECTROSCOPY 2017; 71:215-223. [PMID: 27354400 PMCID: PMC5475280 DOI: 10.1177/0003702816654167] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Surface enhanced Raman spectroscopy (SERS) imaging was used in conjunction with principal component analysis (PCA) for the in situ spatiotemporal mapping of the virulence factor pyocyanin in communities of the pathogenic bacterium Pseudomonas aeruginosa. The combination of SERS imaging and PCA analysis provides a robust method for the characterization of heterogeneous biological systems while circumventing issues associated with interference from sample autofluorescence and low reproducibility of SERS signals. The production of pyocyanin is found to depend both on the growth carbon source and on the specific strain of P. aeruginosa studied. A cystic fibrosis lung isolate strain of P. aeruginosa synthesizes and secretes pyocyanin when grown with glucose and glutamate, while the laboratory strain exhibits detectable production of pyocyanin only when grown with glutamate as the source of carbon. Pyocyanin production in the laboratory strain grown with glucose was below the limit of detection of SERS. In addition, the combination of SERS imaging and PCA can elucidate subtle differences in the molecular composition of biofilms. PCA loading plots from the clinical isolate exhibit features corresponding to vibrational bands of carbohydrates, which represent the mucoid biofilm matrix specific to that isolate, features that are not seen in the PCA loading plots of the laboratory strain.
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Affiliation(s)
- Sneha Polisetti
- 1 Department of Chemical and Biomolecular Engineering, University of Notre Dame, USA
| | - Nameera F Baig
- 2 Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, USA
| | - Nydia Morales-Soto
- 3 Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, USA
- 4 Eck Institute for Global Health, University of Notre Dame, USA
| | - Joshua D Shrout
- 3 Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, USA
- 4 Eck Institute for Global Health, University of Notre Dame, USA
- 5 Department of Biological Sciences, University of Notre Dame, USA
| | - Paul W Bohn
- 1 Department of Chemical and Biomolecular Engineering, University of Notre Dame, USA
- 2 Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, USA
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171
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Zheng M, Zhu X, Chen Y, Xiang Q, Duan H. Three-dimensional donut-like gold nanorings with multiple hot spots for surface-enhanced raman spectroscopy. NANOTECHNOLOGY 2017; 28:045303. [PMID: 27981948 DOI: 10.1088/1361-6528/28/4/045303] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Seeking for the best possible substrates for surface-enhanced Raman spectroscopy (SERS) is of great interest for single-molecule-level detection applications. Lithographic plasmonic nanostructures are supposed to enable uniform enhancement and thus have attracted extensive interest in the past decade. In this work, we propose and demonstrate a lithographic three-dimensional (3D) donut-like gold nanoring array as a SERS substrate with an enhancement factor (EF) up to 3.84 × 107. This 3D nanoring array could be directly fabricated using electron-beam-lithography-defined templates without any additional lift-off process and thus promises ultraclean metallic surfaces. Meanwhile, the 3D configuration allows multiple hot spots for improving SERS performance compared to planar counterparts with comparable plasmon resonance position. Systematic experiments and simulations were conducted to gain understanding of the origin of the improved SERS performance. The results imply that the 3D donut-like gold nanorings with multiple hot spots can serve as a promising configuration for SERS applications.
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Affiliation(s)
- Mengjie Zheng
- School of Electronics and Physics, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, People's Republic of China
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172
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Farrell ME, Strobbia P, Pellegrino PM, Cullum B. Surface regeneration and signal increase in surface-enhanced Raman scattering substrates. APPLIED OPTICS 2017; 56:B198-B213. [PMID: 28157898 DOI: 10.1364/ao.56.00b198] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Regenerated surface-enhanced Raman scattering (SERS) substrates allow users the ability to not only reuse sensing surfaces, but also tailor them to the sensing application needs (wavelength of the available laser, plasmon band matching). In this review, we discuss the development of SERS substrates for response to emerging threats and some of our collaborative efforts to improve on the use of commercially available substrate surfaces. Thus, we are able to extend the use of these substrates to broader Army needs (like emerging threat response).
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173
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Yin Y, Li Q, Ma S, Liu H, Dong B, Yang J, Liu D. Prussian Blue as a Highly Sensitive and Background-Free Resonant Raman Reporter. Anal Chem 2017; 89:1551-1557. [DOI: 10.1021/acs.analchem.6b03521] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yongmei Yin
- State
Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
College of Chemistry, Research Center for Analytical Sciences, and
Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China
| | - Qiang Li
- State
Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
College of Chemistry, Research Center for Analytical Sciences, and
Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China
| | - Sisi Ma
- State
Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
College of Chemistry, Research Center for Analytical Sciences, and
Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China
| | - Huiqiao Liu
- State
Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
College of Chemistry, Research Center for Analytical Sciences, and
Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China
| | - Bo Dong
- State
Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
College of Chemistry, Research Center for Analytical Sciences, and
Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China
| | - Jie Yang
- State
Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
College of Chemistry, Research Center for Analytical Sciences, and
Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China
| | - Dingbin Liu
- State
Key Laboratory of Medicinal Chemical Biology, College of Pharmacy,
College of Chemistry, Research Center for Analytical Sciences, and
Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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174
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Abstract
This review describes the growing partnership between super-resolution imaging and plasmonics, by describing the various ways in which the two topics mutually benefit one another to enhance our understanding of the nanoscale world. First, localization-based super-resolution imaging strategies, where molecules are modulated between emissive and nonemissive states and their emission localized, are applied to plasmonic nanoparticle substrates, revealing the hidden shape of the nanoparticles while also mapping local electromagnetic field enhancements and reactivity patterns on their surface. However, these results must be interpreted carefully due to localization errors induced by the interaction between metallic substrates and single fluorophores. Second, plasmonic nanoparticles are explored as image contrast agents for both superlocalization and super-resolution imaging, offering benefits such as high photostability, large signal-to-noise, and distance-dependent spectral features but presenting challenges for localizing individual nanoparticles within a diffraction-limited spot. Finally, the use of plasmon-tailored excitation fields to achieve subdiffraction-limited spatial resolution is discussed, using localized surface plasmons and surface plasmon polaritons to create confined excitation volumes or image magnification to enhance spatial resolution.
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Affiliation(s)
- Katherine A Willets
- Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States
| | - Andrew J Wilson
- Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States
| | - Vignesh Sundaresan
- Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States
| | - Padmanabh B Joshi
- Department of Chemistry, Temple University , Philadelphia, Pennsylvania 19122, United States
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175
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He LB, Wang YL, Xie X, Han M, Song FQ, Wang BJ, Chen WL, Xu HX, Sun LT. Systematic investigation of the SERS efficiency and SERS hotspots in gas-phase deposited Ag nanoparticle assemblies. Phys Chem Chem Phys 2017; 19:5091-5101. [DOI: 10.1039/c6cp08513j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Revealing the SERS hotspots and SERS efficiencies of Ag nanoparticle assemblies based on the design of multifarious rainbow-like nanoparticle bands.
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Affiliation(s)
- L. B. He
- SEU-FEI Nano-Pico Centre
- Key Lab of MEMS of Ministry of Education
- Southeast University
- Nanjing 210096
- P. R. China
| | - Y. L. Wang
- SEU-FEI Nano-Pico Centre
- Key Lab of MEMS of Ministry of Education
- Southeast University
- Nanjing 210096
- P. R. China
| | - X. Xie
- SEU-FEI Nano-Pico Centre
- Key Lab of MEMS of Ministry of Education
- Southeast University
- Nanjing 210096
- P. R. China
| | - M. Han
- National Laboratory of Solid State Microstructures
- Nanjing University
- Nanjing 210093
- P. R. China
| | - F. Q. Song
- National Laboratory of Solid State Microstructures
- Nanjing University
- Nanjing 210093
- P. R. China
| | - B. J. Wang
- SEU-FEI Nano-Pico Centre
- Key Lab of MEMS of Ministry of Education
- Southeast University
- Nanjing 210096
- P. R. China
| | - W. L. Chen
- Department of Chemical Engineering
- Monash University
- Victoria 3800
- Australia
| | - H. X. Xu
- Centre for Nanoscience and Nanotechnology
- School of Physics and Technology, and Institute for Advanced Studies
- Wuhan University
- Wuhan 430072
- China
| | - L. T. Sun
- SEU-FEI Nano-Pico Centre
- Key Lab of MEMS of Ministry of Education
- Southeast University
- Nanjing 210096
- P. R. China
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176
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Abstract
SERS signal enhancements inside and outside the junctions of the dimers were experimentally calculated.
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Affiliation(s)
- Hyeokjin Yoon
- Department of Chemistry
- Seoul National University
- Seoul 08826
- Republic of Korea
| | - Jung Sang Suh
- Department of Chemistry
- Seoul National University
- Seoul 08826
- Republic of Korea
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177
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Molecular Properties of Sandwiched Molecules Between Electrodes and Nanoparticles. ADVANCES IN QUANTUM CHEMISTRY 2017. [DOI: 10.1016/bs.aiq.2017.03.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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178
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Sereda V, Lednev IK. Two Mechanisms of Tip Enhancement of Raman Scattering by Protein Aggregates. APPLIED SPECTROSCOPY 2017; 71:118-128. [PMID: 27407009 DOI: 10.1177/0003702816651890] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Tip-enhanced Raman spectroscopy (TERS) is a powerful tool for probing the surface of biological species with nanometer spatial resolution. Here, we report the TER spectra of an individual insulin fibril, the protein cast film and a short peptide (LVEALYL) microcrystal mimicking the fibril core. Two different types of TER spectra were acquired depending on the "roughness" of the probed surface at the molecular level. A fully reproducible, low-intensity, normal Raman-type spectrum was characteristic of the top flat surface of the microcrystal while highly variable, higher intensity TER spectra were obtained for the edges of the microcrystal, cast film, and fibril. As a result, two tip enhancement mechanisms of Raman scattering, long- and short-range, were proposed by analogy with the physical and chemical enhancement mechanisms, respectively, known for surface-enhanced Raman spectroscopy.
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179
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Li Y, Yang J, Zhou Y, Zhao N, Zeng W, Wang W. Fabrication of gold nanoparticles/graphene oxide films with surface-enhanced Raman scattering activity by a simple electrostatic self-assembly method. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.10.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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180
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Gieseking RL, Ratner MA, Schatz GC. Semiempirical modeling of electrochemical charge transfer. Faraday Discuss 2017; 199:547-563. [DOI: 10.1039/c6fd00234j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nanoelectrochemical experiments using detection based on tip enhanced Raman spectroscopy (TERS) show a broad distribution of single-molecule formal potentials E°′ for large π-conjugated molecules; theoretical studies are needed to understand the origins of this distribution. In this paper, we present a theoretical approach to determine E°′ for electrochemical reactions involving a single molecule interacting with an electrode represented as a metal nanocluster and apply this method to the Ag20–pyridine system. The theory is based on the semiempirical INDO electronic structure approach, together with the COSMO solvation model and an approach for tuning the Fermi energy, in which the silver atomic orbital energies are varied until the ground singlet state of Ag20–pyridine matches the lowest triplet energy, corresponding to electron transfer from the metal cluster to pyridine. Based on this theory, we find that the variation of E°′ with the structure of the Ag20–pyridine system is only weakly correlated with changes in either the ground-state interaction energy or the charge-transfer excited-state energies at zero applied potential, which shows the importance of calculations that include an applied potential in determining the variation of formal potential with geometry. Factors which determine E°′ include wavefunction overlap for geometries when pyridine is close to the surface, and electrostatics when the molecule-cluster separation is large.
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Affiliation(s)
| | - Mark A. Ratner
- Department of Chemistry
- Northwestern University
- Evanston
- USA
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181
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Ding SY, You EM, Tian ZQ, Moskovits M. Electromagnetic theories of surface-enhanced Raman spectroscopy. Chem Soc Rev 2017; 46:4042-4076. [DOI: 10.1039/c7cs00238f] [Citation(s) in RCA: 734] [Impact Index Per Article: 104.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A fundamental theoretical understanding of SERS, and SERS hotspots, leads to new design principles for SERS substrates and new applications in nanomaterials and chemical analysis.
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Affiliation(s)
- 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
| | - En-Ming You
- 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
| | - Zhong-Qun Tian
- 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
| | - Martin Moskovits
- Department of Chemistry and Biochemistry
- University of California
- Santa Barbara
- California
- USA
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182
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Joshi PB, Anthony TP, Wilson AJ, Willets KA. Imaging out-of-plane polarized emission patterns on gap mode SERS substrates: from high molecular coverage to the single molecule regime. Faraday Discuss 2017; 205:245-259. [DOI: 10.1039/c7fd00163k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Gap mode surface-enhanced Raman scattering (SERS) substrates are created when a single nanoparticle is deposited on a thin metal film, creating a region of significant electromagnetic field enhancement in the gap between the nanoparticle and the film due to excitation of a vertically-oriented, out-of-plane dipole plasmon mode, e.g. the gap plasmon. When molecules are located in the gap and couple to the gap plasmon mode, the resulting emission is polarized perpendicular to the thin film, generating SERS emission patterns that have a characteristic donut shape. We analyze these SERS emission patterns using a dipole emission model and extract out-of-plane and in-plane emission angles associated with the gap plasmon mode. Fluctuations in both of these angles reveal dynamic heterogeneity due to molecular motion within the hot spot that changes as a function of molecular coverage. We also reveal static heterogeneity associated with structural defects in the thin film component of the gap mode substrates, indicating that even nanometer-scale surface roughness can impact the quality of gap mode emission.
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Affiliation(s)
- P. B. Joshi
- Department of Chemistry
- Temple University
- Philadelphia
- USA
| | - T. P. Anthony
- Department of Chemistry
- Temple University
- Philadelphia
- USA
| | - A. J. Wilson
- Department of Chemistry
- Temple University
- Philadelphia
- USA
| | - K. A. Willets
- Department of Chemistry
- Temple University
- Philadelphia
- USA
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183
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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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184
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Witlicki EH, Bähring S, Johnsen C, Solano MV, Nielsen KA, Silverstein DW, Marlatt CW, Jensen L, Jeppesen JO, Flood AH. Enhanced detection of explosives by turn-on resonance Raman upon host–guest complexation in solution and the solid state. Chem Commun (Camb) 2017; 53:10918-10921. [DOI: 10.1039/c7cc06517e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Being colour coordinated allows turn on detection of nitroaromatics by combining molecular recognition with resonant enhancement of the Raman spectra.
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Affiliation(s)
- Edward H. Witlicki
- Department of Chemistry
- Indiana University
- 800 East Kirkwood Avenue
- Bloomington
- Indiana 47405
| | - Steffen Bähring
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- Odense M
- Denmark
| | - Carsten Johnsen
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- Odense M
- Denmark
| | - Marta V. Solano
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- Odense M
- Denmark
| | - Kent A. Nielsen
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- Odense M
- Denmark
| | | | - Craig W. Marlatt
- Department of Chemistry
- Indiana University
- 800 East Kirkwood Avenue
- Bloomington
- Indiana 47405
| | - Lasse Jensen
- Department of Chemistry
- The Pennsylvania State University
- University Park
- USA
| | - Jan O. Jeppesen
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- Odense M
- Denmark
| | - Amar H. Flood
- Department of Chemistry
- Indiana University
- 800 East Kirkwood Avenue
- Bloomington
- Indiana 47405
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185
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Chen S, Chen L, Hu H, Liu Q, Xu Y, Ji F, Bao F, Fan J, Zhang Q. High-yield colloidal synthesis of monometallic Au nanorod–Au nanoparticle dimers and their application in SERS. RSC Adv 2017. [DOI: 10.1039/c7ra01039g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Dimeric nanostructures have attracted much attention owing to their unique structure and excellent physiochemical properties.
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Affiliation(s)
- Suli Chen
- Institute of Functional Nano and Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- SWC for Synchrotron Radiation Research
- Soochow University
| | - Lei Chen
- Institute of Functional Nano and Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- SWC for Synchrotron Radiation Research
- Soochow University
| | - Huicheng Hu
- Institute of Functional Nano and Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- SWC for Synchrotron Radiation Research
- Soochow University
| | - Qipeng Liu
- Institute of Functional Nano and Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- SWC for Synchrotron Radiation Research
- Soochow University
| | - Yong Xu
- Institute of Functional Nano and Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- SWC for Synchrotron Radiation Research
- Soochow University
| | - Fei Ji
- Institute of Functional Nano and Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- SWC for Synchrotron Radiation Research
- Soochow University
| | - Feng Bao
- Institute of Functional Nano and Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- SWC for Synchrotron Radiation Research
- Soochow University
| | - Jian Fan
- Institute of Functional Nano and Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- SWC for Synchrotron Radiation Research
- Soochow University
| | - Qiao Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- SWC for Synchrotron Radiation Research
- Soochow University
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186
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Hu W, Duan S, Luo Y. Theoretical modeling of surface and tip‐enhanced Raman spectroscopies. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2016. [DOI: 10.1002/wcms.1293] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wei Hu
- Department of Theoretical Chemistry and BiologySchool of Biotechnology, Royal Institute of Technology Stockholm Sweden
| | - Sai Duan
- Department of Theoretical Chemistry and BiologySchool of Biotechnology, Royal Institute of Technology Stockholm Sweden
| | - Yi Luo
- Department of Theoretical Chemistry and BiologySchool of Biotechnology, Royal Institute of Technology Stockholm Sweden
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical PhysicsUniversity of Science and Technology of China Hefei P. R. China
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187
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Witkowska E, Korsak D, Kowalska A, Księżopolska-Gocalska M, Niedziółka-Jönsson J, Roźniecka E, Michałowicz W, Albrycht P, Podrażka M, Hołyst R, Waluk J, Kamińska A. Surface-enhanced Raman spectroscopy introduced into the International Standard Organization (ISO) regulations as an alternative method for detection and identification of pathogens in the food industry. Anal Bioanal Chem 2016; 409:1555-1567. [PMID: 28004171 PMCID: PMC5306343 DOI: 10.1007/s00216-016-0090-z] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 10/25/2016] [Accepted: 11/08/2016] [Indexed: 11/30/2022]
Abstract
We show that surface-enhanced Raman spectroscopy (SERS) coupled with principal component analysis (PCA) can serve as a fast, reliable, and easy method for detection and identification of food-borne bacteria, namely Salmonella spp., Listeria monocytogenes, and Cronobacter spp., in different types of food matrices (salmon, eggs, powdered infant formula milk, mixed herbs, respectively). The main aim of this work was to introduce the SERS technique into three ISO (6579:2002; 11290-1:1996/A1:2004; 22964:2006) standard procedures required for detection of these bacteria in food. Our study demonstrates that the SERS technique is effective in distinguishing very closely related bacteria within a genus grown on solid and liquid media. The advantages of the proposed ISO-SERS method for bacteria identification include simplicity and reduced time of analysis, from almost 144 h required by standard methods to 48 h for the SERS-based approach. Additionally, PCA allows one to perform statistical classification of studied bacteria and to identify the spectrum of an unknown sample. Calculated first and second principal components (PC-1, PC-2) account for 96, 98, and 90% of total variance in the spectra and enable one to identify the Salmonella spp., L. monocytogenes, and Cronobacter spp., respectively. Moreover, the presented study demonstrates the excellent possibility for simultaneous detection of analyzed food-borne bacteria in one sample test (98% of PC-1 and PC-2) with a goal of splitting the data set into three separated clusters corresponding to the three studied bacteria species. The studies described in this paper suggest that SERS represents an alternative to standard microorganism diagnostic procedures. Graphical Abstract New approach of the SERS strategy for detection and identification of food-borne bacteria, namely S. enterica, L. monocytogenes, and C. sakazakii in selected food matrices.
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Affiliation(s)
- Evelin Witkowska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland.
| | - Dorota Korsak
- Faculty of Biology, Institute of Microbiology, Applied Microbiology, University of Warsaw, Miecznikowa 1, 02-096, Warsaw, Poland
| | - Aneta Kowalska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | | | - Joanna Niedziółka-Jönsson
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Ewa Roźniecka
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Weronika Michałowicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Paweł Albrycht
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Marta Podrażka
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Robert Hołyst
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Jacek Waluk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland.,Faculty of Mathematics and Natural Sciences, College of Science, Cardinal Stefan Wyszyński University, Dewajtis 5, 01-815, Warsaw, Poland
| | - Agnieszka Kamińska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland.
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188
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Takei H, Okamoto T. Morphology Effects of Cap-shaped Silver Nanoparticle Films as a SERS Platform. ANAL SCI 2016; 32:287-93. [PMID: 26960607 DOI: 10.2116/analsci.32.287] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this paper, we evaluate randomly adsorbed cap-shaped silver nanoparticles for applications to surface-enhanced Raman spectroscopy, SERS. They were prepared by depositing silver on top of surface-adsorbed monodisperse SiO2 nanospheres, in a manner similar to the method for preparing metal film on nanosphere, MFON, but one major difference lies in the fact that nanospheres are randomly adsorbed rather than as a close-packed MFON. With random MFON, it is possible to incorporate nanospheres with more than one size. Mixing has been found to increase SERS performance. More specifically, by using 50 and 100 nm nanospheres, we found that substrates containing both types outperform substrates prepared from 100% of either 50 or 100 nm nanospheres. As evaluated by spectrophotometry, this increase could not be attributed to an increase in the extinction coefficient of the substrate at the irradiation wavelength of SERS measurements.
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189
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190
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Zrimsek AB, Chiang N, Mattei M, Zaleski S, McAnally MO, Chapman CT, Henry AI, Schatz GC, Van Duyne RP. Single-Molecule Chemistry with Surface- and Tip-Enhanced Raman Spectroscopy. Chem Rev 2016; 117:7583-7613. [PMID: 28610424 DOI: 10.1021/acs.chemrev.6b00552] [Citation(s) in RCA: 344] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Single-molecule (SM) surface-enhanced Raman spectroscopy (SERS) and tip-enhanced Raman spectroscopy (TERS) have emerged as analytical techniques for characterizing molecular systems in nanoscale environments. SERS and TERS use plasmonically enhanced Raman scattering to characterize the chemical information on single molecules. Additionally, TERS can image single molecules with subnanometer spatial resolution. In this review, we cover the development and history of SERS and TERS, including the concept of SERS hot spots and the plasmonic nanostructures necessary for SM detection, the past and current methodologies for verifying SMSERS, and investigations into understanding the signal heterogeneities observed with SMSERS. Moving on to TERS, we cover tip fabrication and the physical origins of the subnanometer spatial resolution. Then, we highlight recent advances of SMSERS and TERS in fields such as electrochemistry, catalysis, and SM electronics, which all benefit from the vibrational characterization of single molecules. SMSERS and TERS provide new insights on molecular behavior that would otherwise be obscured in an ensemble-averaged measurement.
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Affiliation(s)
- Alyssa B Zrimsek
- Department of Chemistry, ‡Applied Physics Program, and §Biomedical Engineering, Northwestern University , Evanston, Illinois 60208, United States
| | - Naihao Chiang
- Department of Chemistry, ‡Applied Physics Program, and §Biomedical Engineering, Northwestern University , Evanston, Illinois 60208, United States
| | - Michael Mattei
- Department of Chemistry, ‡Applied Physics Program, and §Biomedical Engineering, Northwestern University , Evanston, Illinois 60208, United States
| | - Stephanie Zaleski
- Department of Chemistry, ‡Applied Physics Program, and §Biomedical Engineering, Northwestern University , Evanston, Illinois 60208, United States
| | - Michael O McAnally
- Department of Chemistry, ‡Applied Physics Program, and §Biomedical Engineering, Northwestern University , Evanston, Illinois 60208, United States
| | - Craig T Chapman
- Department of Chemistry, ‡Applied Physics Program, and §Biomedical Engineering, Northwestern University , Evanston, Illinois 60208, United States
| | - Anne-Isabelle Henry
- Department of Chemistry, ‡Applied Physics Program, and §Biomedical Engineering, Northwestern University , Evanston, Illinois 60208, United States
| | - George C Schatz
- Department of Chemistry, ‡Applied Physics Program, and §Biomedical Engineering, Northwestern University , Evanston, Illinois 60208, United States
| | - Richard P Van Duyne
- Department of Chemistry, ‡Applied Physics Program, and §Biomedical Engineering, Northwestern University , Evanston, Illinois 60208, United States
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191
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Birtoiu IA, Rizea C, Togoe D, Munteanu RM, Micsa C, Rusu MI, Tautan M, Braic L, Scoicaru LO, Parau A, Becherescu-Barbu ND, Udrea MV, Tonetto A, Notonier R, Grigorescu CEA. Diagnosing clean margins through Raman spectroscopy in human and animal mammary tumour surgery: a short review. Interface Focus 2016; 6:20160067. [PMID: 27920899 DOI: 10.1098/rsfs.2016.0067] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Breast cancer frequency in human and other mammal female populations has worryingly increased lately. The acute necessity for taxonomy of the aetiological factors along with seeking for new diagnostic tools and therapy procedures aimed at reducing mortality have yielded in an intense research effort worldwide. Surgery is a regular method to counteract extensive development of breast cancer and prevent metastases provided that negative surgical margins are achieved. This highly technical challenge requires fast, extremely sensitive and selective discrimination between malignant and benign tissues even down to molecular level. The particular advantages of Raman spectroscopy, such as high chemical specificity, and the ability to measure raw samples and optical responses in the visible or near-infrared spectral range, have recently recommended it as a means with elevated potential in precise diagnostic in oncology surgery. This review spans mainly the latter 10 years of exceptional efforts of scientists implementing Raman spectroscopy as a nearly real-time diagnostic tool for clean margins assessment in mastectomy and lumpectomy. Although greatly contributing to medical discoveries for the wealth of humanity, animals as patients have benefitted less from advances in surgery diagnostic using Raman spectroscopy. This work also dedicates a few lines to applications of surface enhanced Raman spectroscopy in veterinary oncological surgery.
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Affiliation(s)
- I A Birtoiu
- Faculty of Veterinary Medicine-University of Agronomic Sciences and Veterinary Medicine , Bucharest , Romania
| | - C Rizea
- ROXY VETERINARY S.R.L , Magurele , Romania
| | - D Togoe
- Faculty of Veterinary Medicine-University of Agronomic Sciences and Veterinary Medicine , Bucharest , Romania
| | - R M Munteanu
- Faculty of Veterinary Medicine-University of Agronomic Sciences and Veterinary Medicine , Bucharest , Romania
| | - C Micsa
- Faculty of Veterinary Medicine-University of Agronomic Sciences and Veterinary Medicine , Bucharest , Romania
| | - M I Rusu
- National Institute of Research and Development for Optoelectronics INOE 2000 , Magurele , Romania
| | - M Tautan
- National Institute of Research and Development for Optoelectronics INOE 2000 , Magurele , Romania
| | - L Braic
- National Institute of Research and Development for Optoelectronics INOE 2000 , Magurele , Romania
| | - L O Scoicaru
- National Institute of Research and Development for Optoelectronics INOE 2000 , Magurele , Romania
| | - A Parau
- National Institute of Research and Development for Optoelectronics INOE 2000 , Magurele , Romania
| | - N D Becherescu-Barbu
- APEL LASER S.R.L., Bucharest, Romania; Faculty of Physics, University of Bucharest, Bucharest, Romania
| | - M V Udrea
- APEL LASER S.R.L. , Bucharest , Romania
| | - A Tonetto
- Aix-Marseille Université , Centrale Marseille, CNRS, Fédération Sciences Chimiques Marseille (FR 1739) - PRATIM, 13000 Marseille , France
| | - R Notonier
- Aix-Marseille Université , Centrale Marseille, CNRS, Fédération Sciences Chimiques Marseille (FR 1739) - PRATIM, 13000 Marseille , France
| | - C E A Grigorescu
- National Institute of Research and Development for Optoelectronics INOE 2000 , Magurele , Romania
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192
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Cathcart N, Coombs N, Gourevich I, Kitaev V. Synthesis and sensing properties of D 5h pentagonal silver star nanoparticles. NANOSCALE 2016; 8:18282-18290. [PMID: 27766337 DOI: 10.1039/c6nr07397b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we use silver decahedral nanoparticle (AgDeNP) seeds to synthesize pentagonal silver stars (AgStDeNPs) and study the sensing properties of these nanoparticles. The regrowth process of AgStDeNPs is kinetically-controlled, so the purity of the seed NPs is critical to avoid secondary deposition in the highly non-equilibrium reduction. To control the regrowth process, surface blocking with sodium polyacrylate (PANa) was implemented. PANa moderates rough silver nanostructures typically obtained by reduction with ascorbic acid. To modulate polymer binding to the surface and thus to tune surface blocking, pH served as a key synthetic parameter. Under optimal regrowth conditions, new sliver was deposited on the highest energy sites of the decahedra - the vertices of the rims - to yield pentagonal stars. The universality of this regrowth process was established with several different seed particles. The sharpness and size of the stellated tips are tunable by the amount of added silver. Gold deposition onto AgStDeNPs enables the preparation of diverse structures with enhanced stability. Ease of transformation, e.g. rounding, of star branches opens a promising venue for enhanced SPR sensing. Also, AgStDeNPs enable femtomolar detection of 5,5-dithiobis(2-nitrobenzoic acid) in SERS.
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Affiliation(s)
- Nicole Cathcart
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, 75 University Avenue W, Waterloo, Ontario, Canada N2L 3C5.
| | - Neil Coombs
- Centre for Nanostructure Imaging, Department of Chemistry, University of Toronto, 80 St. George St. Rm. 50, Toronto M5S 3H6, Canada
| | - Ilya Gourevich
- Centre for Nanostructure Imaging, Department of Chemistry, University of Toronto, 80 St. George St. Rm. 50, Toronto M5S 3H6, Canada
| | - Vladimir Kitaev
- Department of Chemistry and Biochemistry, Wilfrid Laurier University, 75 University Avenue W, Waterloo, Ontario, Canada N2L 3C5.
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193
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Ma C, Trujillo MJ, Camden JP. Nanoporous Silver Film Fabricated by Oxygen Plasma: A Facile Approach for SERS Substrates. ACS APPLIED MATERIALS & INTERFACES 2016; 8:23978-84. [PMID: 27551811 DOI: 10.1021/acsami.6b08191] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Nanoporous metal films are promising substrates for surfaced-enhanced Raman scattering (SERS) measurement, owing to their homogeneity, large surface area, and abundant hot-spots. Herein, a facile procedure was developed to fabricate nanoporous Ag film on various substrate surfaces. Thermally deposited Ag film was first treated with O2 plasma, resulting in porous Ag/AgxO film (AgxO-NF) with nanoscale feature. Sodium citrate was then used to reduce AgxO to Ag, forming nanoporous Ag film (AgNF) with similar morphology. The AgNF substrate demonstrates 30-fold higher Raman intensity than Ag film over polystyrene nanospheres (d = 600 nm) using 4-mercaptobenzoic acid (4-MBA) as the sensing molecule. Comparing with ordinary Raman measurement on 4-MBA solution, an enhancement factor of ∼6 × 10(6) was determined for AgNF. The AgNF substrate was evaluated for benzoic acid, 4-nitrophenol, and 2-mercaptoethanesulfonate, showing high SERS sensitivity for chemicals that bind weakly to Ag surface and molecules with relatively small Raman cross section at micromolar concentration. In addition to its simplicity, the procedure can be applied to various materials such as transparency film, filter paper, hard polystyrene film, and aluminum foil, revealing similar Raman sensitivity. By testing the durability of the substrate, we found that the AgxO films can be stored in ambient conditions for more than 90 days and still deliver the same SERS intensity if the films are treated with sodium citrate before use. These results demonstrate the advantage of the proposed approach for mass production of low-cost, sensitive, and durable SERS substrates. The transferable nature of these AgNF to different flexible surfaces also allows their easy integration with other sensing schemes.
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Affiliation(s)
- Chaoxiong Ma
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
| | - Michael J Trujillo
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
| | - Jon P Camden
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
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194
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Long J, Yi H, Li H, Lei Z, Yang T. Reproducible Ultrahigh SERS Enhancement in Single Deterministic Hotspots Using Nanosphere-Plane Antennas Under Radially Polarized Excitation. Sci Rep 2016; 6:33218. [PMID: 27621109 PMCID: PMC5020428 DOI: 10.1038/srep33218] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/23/2016] [Indexed: 11/26/2022] Open
Abstract
Surface enhanced Raman scattering (SERS) in a nanometer size hotspot has empowered the investigation of chemical structures and dynamic behaviors of one and a few molecules. However, further advancement is hindered by lack of large enough yet reproducible enhancement in single deterministic hotspots. To resolve this problem, here we introduce a nanosphere-plane antenna under radially polarized laser excitation experiment, which provides an electromagnetic enhancement of 109~10 at the gap of each individual nanosphere-plane antenna and a root-mean-square error down to 100.08 between them. The experiment also reveals a nonlinear SERS behavior with less than one plasmon, which is also observed within a single hotspot. The unprecedented simultaneous achievement of ultrahigh enhancement and reproducibility in deterministic individual hotspots is attributed to the combination of a well-controlled hotspot geometry, the efficient coupling between vertical antenna and laser which produces orders of magnitude higher enhancement than previous excitation methods, and low power operation which is critical for high reproducibility. Our method opens a path for systematic studies on single and few molecule SERS and their surface chemistry in an in-situ and well-controlled manner.
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Affiliation(s)
- Jing Long
- State Key Laboratory of Advanced Optical Communication Systems and Networks, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, UM - SJTU Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hui Yi
- State Key Laboratory of Advanced Optical Communication Systems and Networks, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, UM - SJTU Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hongquan Li
- State Key Laboratory of Advanced Optical Communication Systems and Networks, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, UM - SJTU Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zeyu Lei
- State Key Laboratory of Advanced Optical Communication Systems and Networks, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, UM - SJTU Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Tian Yang
- State Key Laboratory of Advanced Optical Communication Systems and Networks, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, UM - SJTU Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China
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195
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Sciutto G, Zangheri M, Prati S, Guardigli M, Mirasoli M, Mazzeo R, Roda A. Immunochemical Micro Imaging Analyses for the Detection of Proteins in Artworks. Top Curr Chem (Cham) 2016; 374:32. [PMID: 27573272 DOI: 10.1007/s41061-016-0033-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 05/03/2016] [Indexed: 01/17/2023]
Abstract
The present review is aimed at reporting on the most advanced and recent applications of immunochemical imaging techniques for the localization of proteins within complex and multilayered paint stratigraphies. Indeed, a paint sample is usually constituted by the superimposition of different layers whose characterization is fundamental in the evaluation of the state of conservation and for addressing proper restoration interventions. Immunochemical methods, which are based on the high selectivity of antigen-antibody reactions, were proposed some years ago in the field of cultural heritage. In addition to enzyme-linked immunosorbent assays for protein identification, immunochemical imaging methods have also been explored in the last decades, thanks to the possibility to localize the target analytes, thus increasing the amount of information obtained and thereby reducing the number of samples and/or analyses needed for a comprehensive characterization of the sample. In this review, chemiluminescent, spectroscopic and electrochemical imaging detection methods are discussed to illustrate potentialities and limits of advanced immunochemical imaging systems for the analysis of paint cross-sections.
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Affiliation(s)
- Giorgia Sciutto
- Department of Chemistry "G. Ciamician", Microchemistry and Microscopy Art Diagnostic Laboratory (M2ADL), University of Bologna, Ravenna Campus, Via Guaccimanni 42, 48100, Ravenna, Italy.
| | - Martina Zangheri
- Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126, Bologna, Italy
| | - Silvia Prati
- Department of Chemistry "G. Ciamician", Microchemistry and Microscopy Art Diagnostic Laboratory (M2ADL), University of Bologna, Ravenna Campus, Via Guaccimanni 42, 48100, Ravenna, Italy
| | - Massimo Guardigli
- Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126, Bologna, Italy
| | - Mara Mirasoli
- Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126, Bologna, Italy
| | - Rocco Mazzeo
- Department of Chemistry "G. Ciamician", Microchemistry and Microscopy Art Diagnostic Laboratory (M2ADL), University of Bologna, Ravenna Campus, Via Guaccimanni 42, 48100, Ravenna, Italy
| | - Aldo Roda
- Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126, Bologna, Italy
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196
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Sadegh N, Khadem H, Tavassoli SH. High Raman-to-fluorescence ratio of Rhodamine 6G excited with 532 nm laser wavelength using a closely packed, self-assembled monolayer of silver nanoparticles. APPLIED OPTICS 2016; 55:6125-6129. [PMID: 27505398 DOI: 10.1364/ao.55.006125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A highly efficient Raman-to-fluorescence ratio of Rhodamine 6G is obtained by means of 532 nm laser wavelength, which is in close proximity of the dye's absorption maximum. Closely packed, gap-filled self-assembled monolayers of silver nanoparticles were produced to observe the Raman signals of Rhodamine 6G. Two mechanisms contribute to detect the Raman signals of the fluorescent sample: surface-enhanced Raman scattering (SERS) and nanomaterial surface energy transfer (NSET). Self-assembled monolayers of silver nanoparticles with different coverage densities and also those filled with probe molecules were prepared through variations of the substrate's immersion time in a nanoparticle solution and drying the substrate, respectively. Examination of the effects of these two factors on the plasmonic response and SERS efficiency of the substrate revealed that in a gap-filled dense coverage, near-field interactions dominate, which remarkably increase the Raman-to-fluorescence ratio (RFR). To have a perfect dense coverage, the efficient immersion time was obtained at about 48 h. Drying the substrates also caused further enhancement in RFR through filling interparticle spaces with dye molecules and, accordingly, an increase in NSET efficiency.
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197
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Jeon TY, Kim DJ, Park SG, Kim SH, Kim DH. Nanostructured plasmonic substrates for use as SERS sensors. NANO CONVERGENCE 2016; 3:18. [PMID: 28191428 PMCID: PMC5271569 DOI: 10.1186/s40580-016-0078-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Accepted: 06/29/2016] [Indexed: 05/22/2023]
Abstract
Plasmonic nanostructures strongly localize electric fields on their surfaces via the collective oscillations of conducting electrons under stimulation by incident light at a certain wavelength. Molecules adsorbed onto the surfaces of plasmonic structures experience a strongly enhanced electric field due to the localized surface plasmon resonance (LSPR), which amplifies the Raman scattering signal obtained from these adsorbed molecules. This phenomenon is referred to as surface-enhanced Raman scattering (SERS). Because Raman spectra serve as molecular fingerprints, SERS has been intensively studied for its ability to facilely detect molecules and provide a chemical analysis of a solution. Further enhancements in the Raman intensity and therefore higher sensitivity in SERS-based molecular analysis have been achieved by designing plasmonic nanostructures with a controlled size, shape, composition, and arrangement. This review paper focuses on the current state of the art in the fabrication of SERS-active substrates and their use as chemical and biosensors. Starting with a brief description of the basic principles underlying LSPR and SERS, we discuss three distinct nanofabrication methods, including the bottom-up assembly of nanoparticles, top-down nanolithography, and lithography-free random nanoarray formation. Finally, typical applications of SERS-based sensors are discussed, along with their perspectives and challenges.
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Affiliation(s)
- Tae Yoon Jeon
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, Daejeon, 305-701 Republic of Korea
| | - Dong Jae Kim
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, Daejeon, 305-701 Republic of Korea
| | - Sung-Gyu Park
- Advanced Functional Thin Films Department, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam 641-831 Republic of Korea
| | - Shin-Hyun Kim
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, Daejeon, 305-701 Republic of Korea
| | - Dong-Ho Kim
- Advanced Functional Thin Films Department, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam 641-831 Republic of Korea
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198
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Novikov SM, Beermann J, Frydendahl C, Stenger N, Coello V, Mortensen NA, Bozhevolnyi SI. Enhancement of two-photon photoluminescence and SERS for low-coverage gold films. OPTICS EXPRESS 2016; 24:16743-16751. [PMID: 27464128 DOI: 10.1364/oe.24.016743] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Electromagnetic field enhancement (FE) effects occurring in thin gold films 3-12-nm are investigated with two-photon photoluminescence (TPL) and Raman scanning optical microscopies. The samples are characterized using scanning electron microscopy images and linear optical spectroscopy. TPL images exhibit a strong increase in the level of TPL signals for films thicknesses 3-8-nm, near the percolation threshold. For some thicknesses, TPL measurements reveal super-cubic dependences on the incident power. We ascribe this feature to the occurrence of very strongly localized and enhanced electromagnetic fields due to multiple light scattering in random nanostructures that might eventually lead to white-light generation. Raman images exhibit increasing Raman signals when decreasing the film thickness from 12 to 6-nm and decreasing signal for the 3-nm-film. This feature correlates with the TPL observations indicating that highest FE is to be expected near the percolation threshold.
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199
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Wang Y, Wang H, Wang Y, Shen Y, Xu S, Xu W. Plasmon-Driven Dynamic Response of a Hierarchically Structural Silver-Decorated Nanorod Array for Sub-10 nm Nanogaps. ACS APPLIED MATERIALS & INTERFACES 2016; 8:15623-15629. [PMID: 27250862 DOI: 10.1021/acsami.6b04173] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Plasmonic nanogaps serve as a useful configuration for light concentration and local field amplification owing to the extreme localization of surface plasmons. Here, a smart plasmonic nanogap device is fabricated by the dynamic response of an Ag decorated hierarchically structural vertical polymer nanorod array under the light irradiation. Seven nanorods in one unit bend because of plasmonic heating effect and they are centrally collected due to the attraction of the plasmon-induced polaritons, leading to the significantly enhanced local electromagnetic field at the sub-10 nm gaps among the constricted nanorod tops. Compared with tuning capillarity in microscale by wetting and drying, using light as external stimuli is much easier and more tunable in nanoscale. This plasmonic nanogap device is used for a surface-enhanced Raman scattering (SERS) substrate. Its hydrophobic surface with a contact angle of 142 degree can make the probed aqueous solution only access to the Ag tips of nanorods. Thus, the analytes can be driven to the "hot spot" regions where located at the tops of nanorods during the solvent evaporation process, which is beneficial to SERS detection. Discovery of this smart plasmon-driven process broadens the scope for further functionality of both the dynamic nanostructure design and the smart plasmonic devices in the communities of chemistry, biomedicine, and microfluidic engineering.
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Affiliation(s)
- Yi Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun, Jilin, China
| | - Hailong Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun, Jilin, China
| | - Yuyang Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun, Jilin, China
| | - Yanting Shen
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun, Jilin, China
| | - Shuping Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun, Jilin, China
| | - Weiqing Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University , Changchun, Jilin, China
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Abstract
In this review, we survey recent advances in the field of molecular plasmonics beyond the traditional sensing modality. Molecular plasmonics is explored in the context of the complex interaction between plasmon resonances and molecules and the ability of molecules to support plasmons self-consistently. First, spectroscopic changes induced by the interaction between molecular and plasmonic resonances are discussed, followed by examples of how tuning molecular properties leads to active molecular plasmonic systems. Next, the role of the position and polarizability of a molecular adsorbate on surface-enhanced Raman scattering signals is examined experimentally and theoretically. Finally, we introduce recent research focused on using molecules as plasmonic materials. Each of these examples is intended to highlight the role of molecules as integral components in coupled molecule-plasmon systems, as well as to show the diversity of applications in molecular plasmonics.
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Affiliation(s)
- Andrew J Wilson
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122;
| | - Katherine A Willets
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122;
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