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Karthick Kannan P, Shankar P, Blackman C, Chung CH. Recent Advances in 2D Inorganic Nanomaterials for SERS Sensing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1803432. [PMID: 30773698 DOI: 10.1002/adma.201803432] [Citation(s) in RCA: 108] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 01/02/2019] [Indexed: 05/23/2023]
Abstract
Surface-enhanced Raman spectroscopy is a powerful and sensitive analytical tool that has found application in chemical and biomolecule analysis and environmental monitoring. Since its discovery in the early 1970s, a variety of materials ranging from noble metals to nanostructured materials have been employed as surface enhanced Raman scattering (SERS) substrates. In recent years, 2D inorganic materials have found wide use in the development of SERS-based chemical sensors owing to their unique thickness dependent physico-chemical properties with enhanced chemical-based charge-transfer processes. Here, recent advances in the application of various 2D inorganic nanomaterials, including graphene, boron nitride, semiconducting metal oxides, and transition metal chalcogenides, in chemical detection via SERS are presented. The background of the SERS concept, including its basic theory and sensing mechanism, along with the salient features of different nanomaterials used as substrates in SERS, extending from monometallic nanoparticles to nanometal oxides, is comprehensively discussed. The importance of 2D inorganic nanomaterials in SERS enhancement, along with their application toward chemical detection, is explained in detail with suitable examples and illustrations. In conclusion, some guidelines are presented for the development of this promising field in the future.
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Affiliation(s)
| | - Prabakaran Shankar
- School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Institute of Innovative Science and Technology, Tokai University, Hiratsuka, Kanagawa, 259 1292, Japan
| | - Chris Blackman
- Department of Chemistry, University College London, London, WC1H 0AJ, UK
| | - Chan-Hwa Chung
- School of Chemical Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea
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Sivashanmugan K, Squire K, Kraai JA, Tan A, Zhao Y, Rorrer GL, Wang AX. Biological Photonic Crystal-Enhanced Plasmonic Mesocapsules: Approaching Single-Molecule Optofluidic-SERS Sensing. ADVANCED OPTICAL MATERIALS 2019; 7:1900415. [PMID: 32775144 PMCID: PMC7410161 DOI: 10.1002/adom.201900415] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Indexed: 05/05/2023]
Abstract
Surface-enhanced Raman scattering (SERS) sensing in microfluidic devices, namely optofluidic-SERS, suffers an intrinsic trade-off between mass transport and hot spot density, both of which are required for ultra-sensitive detection. To overcome this compromise, photonic crystal-enhanced plasmonic mesocapsules are synthesized, utilizing diatom biosilica decorated with in-situ growth silver nanoparticles (Ag NPs). In our optofluidic-SERS testing, 100× higher enhancement factors and greater than 1,000× better detection limit were achieved compared with traditional colloidal Ag NPs, the improvement of which is attributed to unique properties of the mesocapsules. First, the porous diatom biosilica frustules serve as carrier capsules for high density Ag NPs that form high density plasmonic hot-spots. Second, the submicron-pores embedded in the frustule walls not only create a large surface-to-volume ratio allowing for effective analyte capture, but also enhance the local optical field through the photonic crystal effect. Last, the mesocapsules provide effective mixing with analytes as they are flowing inside the microfluidic channel. The reported mesocapsules achieved single molecule detection of Rhodamine 6G in microfluidic devices and were further utilized to detect 1 nM of benzene and chlorobenzene compounds in tap water with near real-time response, which successfully overcomes the constraint of traditional optofluidic sensing.
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Affiliation(s)
- Kundan Sivashanmugan
- School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR 97331, USA
| | - Kenneth Squire
- School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR 97331, USA
| | - Joseph A. Kraai
- School of Chemical, Biological, and Ecological Engineering, Oregon State University, Corvallis, OR 97331, USA
| | - Ailing Tan
- School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR 97331, USA
- School of Information Science and Engineering, The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, Yanshan University, Qinhuangdao 066004, China
| | - Yong Zhao
- School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR 97331, USA
- School of Electrical Engineering, The Key Laboratory of Measurement Technology and Instrumentation of Hebei Province, Yanshan University, Qinhuangdao, 066004, China
| | - Gregory L. Rorrer
- School of Chemical, Biological, and Ecological Engineering, Oregon State University, Corvallis, OR 97331, USA
| | - Alan X. Wang
- School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR 97331, USA
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53
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Amendola V. Correlation of surface-enhanced Raman scattering (SERS) with the surface density of gold nanoparticles: evaluation of the critical number of SERS tags for a detectable signal. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2019; 10:1016-1023. [PMID: 31165028 PMCID: PMC6541332 DOI: 10.3762/bjnano.10.102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 05/03/2019] [Indexed: 05/26/2023]
Abstract
The use of plasmonic nanotags based on the surface-enhanced Raman scattering (SERS) effect is highly promising for several applications in analytical chemistry, biotechnological assays and nanomedicine. To this end, a crucial parameter is the minimum number of SERS tags that allows for the collection of intense Raman signals under real operating conditions. Here, SERS Au nanotags (AuNTs) based on clustered gold nanoparticles are deposited on a substrate and analyzed in the same region using Raman spectroscopy and transmission electron microscopy. In this way, the Raman spectra and the surface density of the SERS tags are correlated directly, showing that 1 tag/µm2 is enough to generate an intense signal above the noise level at 633 nm with an excitation power of only 0.65 mW and an acquisition time of just 1 s with a 50× objective. The AuNT density can be even lower than 1 tag/µm2 when the acquisition time is extended to 10 s, but must be increased to 3 tags/µm2 when a 20× objective is employed under the same excitation conditions. In addition, in order to observe a linear response, it was found that 10 SERS AuNTs inside the probed area are required. These findings indicate that a better signal-to-noise ratio requires high-magnification optics, while linearity versus tag number can be improved by using low-magnification optics or a high tag density. In general the suitability of plasmonic SERS labels for ultrasensitive analytical and biomedical applications is evident.
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Affiliation(s)
- Vincenzo Amendola
- Department of Chemical Sciences, University of Padova, Padova, Italy
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54
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Robust SERS Platforms Based on Annealed Gold Nanostructures Formed on Ultrafine Glass Substrates for Various (Bio)Applications. BIOSENSORS-BASEL 2019; 9:bios9020053. [PMID: 30974897 PMCID: PMC6627616 DOI: 10.3390/bios9020053] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 03/21/2019] [Accepted: 03/29/2019] [Indexed: 12/30/2022]
Abstract
In this study, stable gold nanoparticles (AuNPs) are fabricated for the first time on commercial ultrafine glass coverslips coated with gold thin layers (2 nm, 4 nm, 6 nm, and 8 nm) at 25 °C and annealed at high temperatures (350 °C, 450 °C, and 550 °C) on a hot plate for different periods of time. Such gold nanostructured coverslips were systematically tested via surface enhanced Raman spectroscopy (SERS) to identify their spectral performances in the presence of different concentrations of a model molecule, namely 1,2-bis-(4-pyridyl)-ethene (BPE). By using these SERS platforms, it is possible to detect BPE traces (10−12 M) in aqueous solutions in 120 s. The stability of SERS spectra over five weeks of thiol-DNA probe (2 µL) deposited on gold nano-structured coverslip is also reported.
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55
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Controlling the Nanoscale Gaps on Silver Island Film for Efficient Surface-Enhanced Raman Spectroscopy. NANOMATERIALS 2019; 9:nano9030470. [PMID: 30897840 PMCID: PMC6474112 DOI: 10.3390/nano9030470] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/18/2019] [Accepted: 03/19/2019] [Indexed: 11/17/2022]
Abstract
We control the nanoscale gaps on silver island films by different processing methods and investigate the surface-enhanced Raman scattering (SERS) efficiency on the films. We propose a facile technique to control the film morphology by substrate bending while keeping the evaporation rate constant. The films developed by our new method are compared to the films developed by traditional methods at various evaporation rates. The SERS signals generated on the samples prepared by the new method have similar strengths as the traditional methods. Substrate bending allows us to reduce the gap sizes while using a higher evaporation rate, hence the film can be developed in a shorter time. This cost-effective and time-efficient method is suitable for the mass production of large-area SERS sensors with good sensitivity. Scanning electron microscope images are analyzed to quantify the gap densities and widths to elucidate the relationship between the film morphology and the SERS intensity. While the gap size appears to be the major factor influencing the enhancement, the shape of the nano-island also seems to influence the SERS efficiency.
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56
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Witkowska E, Niciński K, Korsak D, Szymborski T, Kamińska A. Sources of variability in SERS spectra of bacteria: comprehensive analysis of interactions between selected bacteria and plasmonic nanostructures. Anal Bioanal Chem 2019; 411:2001-2017. [PMID: 30828759 PMCID: PMC6458985 DOI: 10.1007/s00216-019-01609-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/17/2018] [Accepted: 01/14/2019] [Indexed: 12/13/2022]
Abstract
The surface-enhanced Raman spectroscopy (SERS)-based analysis of bacteria suffers from the lack of a standard SERS detection protocol (type of substrates, excitation frequencies, and sampling methodologies) that could be employed throughout laboratories to produce repeatable and valuable spectral information. In this work, we have examined several factors influencing the spectrum and signal enhancement during SERS studies conducted on both Gram-negative and Gram-positive bacterial species: Escherichia coli and Bacillus subtilis, respectively. These factors can be grouped into those which are related to the structure and types of plasmonic systems used during SERS measurements and those that are associated with the culturing conditions, types of culture media, and method of biological sample preparation. ![]()
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Affiliation(s)
- Evelin Witkowska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland.
| | - Krzysztof Niciński
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Dorota Korsak
- Faculty of Biology, Department of Applied Microbiology, Institute of Microbiology, University of Warsaw, Miecznikowa 1, 02-096, Warsaw, Poland
| | - Tomasz Szymborski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Agnieszka Kamińska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland.
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57
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Gong X, Liao X, Li Y, Cao H, Zhao Y, Li H, Cassidy DP. Sensitive detection of polycyclic aromatic hydrocarbons with gold colloid coupled chloride ion SERS sensor. Analyst 2019; 144:6698-6705. [DOI: 10.1039/c9an01540j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly sensitive detection of PAH by non-functionally modified gold colloid was realized by chloride ion coupling.
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Affiliation(s)
- Xuegang Gong
- Key Laboratory of Land Surface Pattern and Simulation
- Beijing Key Laboratory of Environmental Damage Assessment and Remediation
- Institute of Geographical Sciences and Natural Resources Research
- Chinese Academy of Sciences
- Beijing 100101
| | - Xiaoyong Liao
- Key Laboratory of Land Surface Pattern and Simulation
- Beijing Key Laboratory of Environmental Damage Assessment and Remediation
- Institute of Geographical Sciences and Natural Resources Research
- Chinese Academy of Sciences
- Beijing 100101
| | - You Li
- Key Laboratory of Land Surface Pattern and Simulation
- Beijing Key Laboratory of Environmental Damage Assessment and Remediation
- Institute of Geographical Sciences and Natural Resources Research
- Chinese Academy of Sciences
- Beijing 100101
| | - Hongying Cao
- Key Laboratory of Land Surface Pattern and Simulation
- Beijing Key Laboratory of Environmental Damage Assessment and Remediation
- Institute of Geographical Sciences and Natural Resources Research
- Chinese Academy of Sciences
- Beijing 100101
| | - Yishu Zhao
- Key Laboratory of Land Surface Pattern and Simulation
- Beijing Key Laboratory of Environmental Damage Assessment and Remediation
- Institute of Geographical Sciences and Natural Resources Research
- Chinese Academy of Sciences
- Beijing 100101
| | - Haonan Li
- Key Laboratory of Land Surface Pattern and Simulation
- Beijing Key Laboratory of Environmental Damage Assessment and Remediation
- Institute of Geographical Sciences and Natural Resources Research
- Chinese Academy of Sciences
- Beijing 100101
| | - Daniel P. Cassidy
- Department of Geological & Environmental Sciences
- Western Michigan University
- Kalamazoo 49008-5241
- USA
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58
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Jradi S, Zaarour L, Chehadi Z, Akil S, Plain J. Femtosecond Direct Laser-Induced Assembly of Monolayer of Gold Nanostructures with Tunable Surface Plasmon Resonance and High Performance Localized Surface Plasmon Resonance and Surface Enhanced Raman Scattering Sensing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:15763-15772. [PMID: 30481036 DOI: 10.1021/acs.langmuir.8b00413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We show femtosecond direct laser-induced assembly of gold nanostructures with plasmon resonance band variable as a function of laser irradiation in a wide range of visible wavelengths. A system of 2-photon lithography is used to achieve site-selectively controlled dewetting of a thin gold film into nanostructures in which size and shape are highly dependent on the laser power. Simultaneous measurements of localized surface plasmon resonance (LSPR) and surface enhanced Raman scattering (SERS) in the presence of various concentrations of trans-1,2-bis(4-pyridyl) ethylene (BPE) as target molecule are performed in order to highlight the relationship between structural dimensions, plasmonic effect, and detection activity. The resulting gold NPs exhibit high sensitivity as both LSPR and SERS sensors and allow the detection of picomolar concentrations of BPE with a SERS enhancement factor (SEF) of 1.33 × 109 and a linear detection range between 10-3 and 10-12 M.
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Affiliation(s)
- Safi Jradi
- Light Nanomaterials and Nanotechnologies (L2n former LNIO), Institut Charles Delaunay, CNRS , Université de Technologie de Troyes , 12 rue Marie Curie, CS 42060 , Troyes , 10004 , France
| | - Lama Zaarour
- Light Nanomaterials and Nanotechnologies (L2n former LNIO), Institut Charles Delaunay, CNRS , Université de Technologie de Troyes , 12 rue Marie Curie, CS 42060 , Troyes , 10004 , France
| | - Zeinab Chehadi
- Light Nanomaterials and Nanotechnologies (L2n former LNIO), Institut Charles Delaunay, CNRS , Université de Technologie de Troyes , 12 rue Marie Curie, CS 42060 , Troyes , 10004 , France
| | - Suzanna Akil
- Light Nanomaterials and Nanotechnologies (L2n former LNIO), Institut Charles Delaunay, CNRS , Université de Technologie de Troyes , 12 rue Marie Curie, CS 42060 , Troyes , 10004 , France
- Laboratoire de Chimie et Physique, Approche Multi-échelle des Milieux Complexes , Université de Lorraine , 1 boulevard Arago , Metz , 57070 , France
| | - Jérôme Plain
- Light Nanomaterials and Nanotechnologies (L2n former LNIO), Institut Charles Delaunay, CNRS , Université de Technologie de Troyes , 12 rue Marie Curie, CS 42060 , Troyes , 10004 , France
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59
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One-Pot Synthesis of Multi-Branch Gold Nanoparticles and Investigation of Their SERS Performance. BIOSENSORS-BASEL 2018; 8:bios8040113. [PMID: 30463357 PMCID: PMC6315941 DOI: 10.3390/bios8040113] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 11/14/2018] [Accepted: 11/16/2018] [Indexed: 01/11/2023]
Abstract
Gold nanoparticles with multiple branches have attracted intensive studies for their application in sensing of low trace molecules. A large number of the merits found on the gold nanoparticles for the above applications are attributed to the strong localized surface plasmon resonance excited by the incident radiation. However, a facile and flexible way of synthesizing the multi-branch gold nanoparticles with tunable localized surface plasmon resonance frequency is still a challenge for the plasmonic research field. Herein, we report an efficient one-pot synthesis of multi-branch gold nanoparticles method that resembles a seed-medicated approach while using no further chemicals except chloroauric acid, ascorbic acid and 4-(2-Hydroxyethyl)-1-piperazinyl]-ethanesulfonic acid. By controlling the amounts of ascorbic acid volumes in the reaction mixture, the morphology and the localized surface plasmon resonance frequency of the synthesized multi-branch gold nanoparticles can be manipulated conveniently. Moreover, using the 4-Mercaptobenzoic acid as the Raman reporter, the multi-branch gold nanoparticles show superior surface-enhanced Raman spectroscopy characteristics that can be potentially used in chemical and biological sensing.
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60
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Zhuang C, Xu Y, Xu N, Wen J, Chen H, Deng S. Plasmonic Sensing Characteristics of Gold Nanorods with Large Aspect Ratios. SENSORS 2018; 18:s18103458. [PMID: 30326557 PMCID: PMC6210301 DOI: 10.3390/s18103458] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/07/2018] [Accepted: 10/10/2018] [Indexed: 02/05/2023]
Abstract
Plasmonic gold nanorods play important roles in nowadays state-of-the-art plasmonic sensing techniques. Most of the previous studies and applications focused on gold nanorods with relatively small aspect ratios, where the plasmon wavelengths are smaller than 900 nm. Gold nanorods with large aspect ratios are predicted to exhibit high refractive-index sensitivity (Langmir 2008, 24, 5233–5237), which therefore should be promising for the development of high-performance plasmonic chemical- and bio-sensors. In this study, we developed gold nanorods with aspect ratios over 7.9, which exhibit plasmon resonances around 1064 nm. The refractive index (RI) sensitivity of these nanorods have been evaluated by varying their dielectric environment, whereby a sensitivity as high as 473 nm/RIU (refractive index unit) can be obtained. Furthermore, we have demonstrated the large-aspect-ratio nanorods as efficient substrate for surface enhanced Raman spectroscopy (SERS), where an enhancement factor (EF) as high as 9.47 × 108 was measured using 4-methylbenzenethiol (4-MBT) as probe molecule. Finally, a type of flexible SERS substrate is developed by conjugating the gold nanorods with the polystyrene (PS) polymer. The results obtained in our study can benefit the development of plasmonic sensing techniques utilized in the near-infrared spectral region.
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Affiliation(s)
- Chao Zhuang
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Yifan Xu
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Ningsheng Xu
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Jinxiu Wen
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Huanjun Chen
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Shaozhi Deng
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, Sun Yat-sen University, Guangzhou 510275, China.
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61
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Dataset for SERS Plasmonic Array: Width, Spacing, and Thin Film Oxide Thickness Optimization. DATA 2018. [DOI: 10.3390/data3030037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Surface-enhanced Raman spectroscopy (SERS) improves the scope and power of Raman spectroscopy by taking advantage of plasmonic nanostructures, which have the potential to enhance Raman signal strength by several orders of magnitude, which can allow for the detection of analyte molecules. The dataset presented provides results of a computational study that used a finite element method (FEM) to model gold nanowires on a silicon dioxide substrate. The survey calculated the surface average of optical surface enhancement due to plasmonic effects across the entire model and studied various geometric parameters regarding the width of the nanowires, spacing between the nanowires, and thickness of the silicon dioxide substrate. From this data, enhancement values were found to have a periodicity due to the thickness of the silicon dioxide. Additionally, strong plasmonic enhancement for smaller distances between nanowires were found, as expected; however, additional surface enhancement at greater gap distances were observed, which were not anticipated, possibly due to resonance with periodic dimensions and the frequency of the light. This data presentation will benefit future SERS studies by probing further into the computational and mathematical material presented previously.
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62
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Preparation of Highly Catalytic N-Doped Carbon Dots and Their Application in SERS Sulfate Sensing. MATERIALS 2018; 11:ma11091655. [PMID: 30205487 PMCID: PMC6165424 DOI: 10.3390/ma11091655] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 09/03/2018] [Accepted: 09/03/2018] [Indexed: 11/25/2022]
Abstract
Carbon dots (CD) have excellent stability and fluorescence activity, and have been widely used in fluorescence methods. However, there are no reports about using CD as catalysts to amplify SERS signals to detect trace sulfate. Thus, preparing CD catalysts and their application in SERS sulfate-sensing are significant. In this article, highly catalytic N-doped carbon dots (CDN) were prepared by a hydrothermal procedure. CDN exhibited strong catalysis of the gold nanoparticle (AuNP) reaction between HAuCl4 and H2O2. Vitoria blue 4R (VB4R) has a strong SERS peak at 1614 cm−1 in the formed AuNP sol substrate. When Ba2+ ions were added, they were adsorbed on a CDN surface to inhibit the CDN catalytic activity that caused the SERS peak decreasing. Upon addition of analyte SO42−, a reaction with Ba2+ produced stable BaSO4 precipitate and CDN, and its catalysis recovered to cause SERS intensity increasing linearly. Thus, an SERS method was developed for the detection of 0.02–1.7 μmol/L SO42−, with a detection limit of 0.007 μmol/L.
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63
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Phan LMT, Rafique R, Baek SH, Nguyen TP, Park KY, Kim EB, Kim JG, Park JP, Kailasa SK, Kim HJ, Chung C, Shim TS, Park TJ. Gold-copper nanoshell dot-blot immunoassay for naked-eye sensitive detection of tuberculosis specific CFP-10 antigen. Biosens Bioelectron 2018; 121:111-117. [PMID: 30205244 DOI: 10.1016/j.bios.2018.08.068] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/04/2018] [Accepted: 08/27/2018] [Indexed: 11/25/2022]
Abstract
Herein, a straightforward and highly specific dot-blot immunoassay was successfully developed for the detection of Mycobacterium tuberculosis antigen (10 kDa culture filtrate protein, CFP-10) via the formation of copper nanoshell on the gold nanoparticles (AuNPs) surface. The principle of dot-blot immunoassay was based on the reduction of Cu2+ ion on the GBP-CFP10G2-AuNPs conjugates, which has gold binding and antigen binding affinities, simultaneously, favouring to appear red dot that can be observed with naked-eye. The dot intensity is proportional to the concentration of tuberculosis antigen CFP-10, which offers a detection limit of 7.6 pg/mL. The analytical performance of GBP-CFP10G2-AuNPs-copper nanoshell dot-blot was superior than that of conventional silver nanoshell. This method was successfully applied to identify the CFP-10 antigen in the clinical urine sample with high sensitivity, specificity, and minimized sample preparation steps. This method exhibits great application potential in the field of nanomedical science for highly reliable point-of-care detection of CFP-10 antigen in real samples to early diagnosis of tuberculosis.
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Affiliation(s)
- Le Minh Tu Phan
- Department of Chemistry, Institute of Interdisciplinary Convergence Research, Research Institute of Halal Industrialization Technology, Chung-Ang University, 84 Heukseok-ro, Donjak-gu, Seoul 06974, Republic of Korea
| | - Rafia Rafique
- Department of Chemistry, Institute of Interdisciplinary Convergence Research, Research Institute of Halal Industrialization Technology, Chung-Ang University, 84 Heukseok-ro, Donjak-gu, Seoul 06974, Republic of Korea
| | - Seung Hoon Baek
- Department of Chemistry, Institute of Interdisciplinary Convergence Research, Research Institute of Halal Industrialization Technology, Chung-Ang University, 84 Heukseok-ro, Donjak-gu, Seoul 06974, Republic of Korea
| | - Thang Phan Nguyen
- Department of Chemistry, Institute of Interdisciplinary Convergence Research, Research Institute of Halal Industrialization Technology, Chung-Ang University, 84 Heukseok-ro, Donjak-gu, Seoul 06974, Republic of Korea
| | - Kyoung Yeol Park
- Department of Chemistry, Institute of Interdisciplinary Convergence Research, Research Institute of Halal Industrialization Technology, Chung-Ang University, 84 Heukseok-ro, Donjak-gu, Seoul 06974, Republic of Korea
| | - Eun Bee Kim
- Department of Chemistry, Institute of Interdisciplinary Convergence Research, Research Institute of Halal Industrialization Technology, Chung-Ang University, 84 Heukseok-ro, Donjak-gu, Seoul 06974, Republic of Korea
| | - Jong Gil Kim
- Department of Chemistry, Institute of Interdisciplinary Convergence Research, Research Institute of Halal Industrialization Technology, Chung-Ang University, 84 Heukseok-ro, Donjak-gu, Seoul 06974, Republic of Korea
| | - Jong Pil Park
- Department of Pharmaceutical Engineering, Daegu Haany University, Gyeongsan 38610, Republic of Korea
| | - Suresh Kumar Kailasa
- Department of Chemistry, Institute of Interdisciplinary Convergence Research, Research Institute of Halal Industrialization Technology, Chung-Ang University, 84 Heukseok-ro, Donjak-gu, Seoul 06974, Republic of Korea; Department of Applied Chemistry, S. V. National Institute of Technology, Surat 395007, Gujarat, India
| | - Hwa-Jung Kim
- Department of Microbiology and Research Institute for Medical Science, College of Medicine, Chungnam National University, Daejeon 35015, Republic of Korea.
| | - Chaeuk Chung
- Department of Pulmonary and Critical Care Medicine, Chungnam National University Hospital, 282 Munhwa-ro, Jung-gu, Daejeon 35015, Republic of Korea
| | - Tae Sun Shim
- Department of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-Gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Tae Jung Park
- Department of Chemistry, Institute of Interdisciplinary Convergence Research, Research Institute of Halal Industrialization Technology, Chung-Ang University, 84 Heukseok-ro, Donjak-gu, Seoul 06974, Republic of Korea.
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Eremina OE, Semenova AA, Sergeeva EA, Brazhe NA, Maksimov GV, Shekhovtsova TN, Goodilin EA, Veselova IA. Surface-enhanced Raman spectroscopy in modern chemical analysis: advances and prospects. RUSSIAN CHEMICAL REVIEWS 2018. [DOI: 10.1070/rcr4804] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Wei Y, Pei H, Li L, Zhu Y. The effect of nonlocal dielectric response on the surface-enhanced Raman and fluorescence spectra of molecular systems. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:245302. [PMID: 29726841 DOI: 10.1088/1361-648x/aac28d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We present a theoretical study on the influence of the nonlocal dielectric response on surface-enhanced resonant Raman scattering (SERRS) and fluorescence (SEF) spectra of a model molecule confined in the center of a Ag nanoparticle (NP) dimer. In the simulations, the nonlocal dielectric response caused by the electron-hole pair generation in Ag NPs was computed with the d-parameter theory, and the scattering spectra of a model molecule representing the commonly used fluorescent dye rhodamine 6G (R6G) were obtained by density-matrix calculations. The influence of the separation between Ag NP dimers on the damping rate and scattering spectra with and without the nonlocal response were systematically analyzed. The results show that the nonlocal dielectric response is very sensitive to the gap distance of the NP dimers, and it undergoes much faster decay with the increase of the separation than the radiative and energy transfer rates. The Raman and fluorescence peaks as simulated with the nonlocal dielectric response are relative weaker than that without the nonlocal effect for smaller NP separations because the extra decay rates of the nonlocal effect could reduce both the population of the excited state and the interband coherence between the ground and excited states. Our result also indicates that the nonlocal effect is more prominent on the SEF process than the SERRS process.
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Affiliation(s)
- Yong Wei
- Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao, 066004, People's Republic of China
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66
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Brawley ZT, Bauman SJ, Darweesh AA, Debu DT, Tork Ladani F, Herzog JB. Plasmonic Au Array SERS Substrate with Optimized Thin Film Oxide Substrate Layer. MATERIALS 2018; 11:ma11060942. [PMID: 29867013 PMCID: PMC6025579 DOI: 10.3390/ma11060942] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 05/17/2018] [Accepted: 05/17/2018] [Indexed: 02/06/2023]
Abstract
This work studies the effect of a plasmonic array structure coupled with thin film oxide substrate layers on optical surface enhancement using a finite element method. Previous results have shown that as the nanowire spacing increases in the sub-100 nm range, enhancement decreases; however, this work improves upon previous results by extending the range above 100 nm. It also averages optical enhancement across the entire device surface rather than localized regions, which gives a more practical estimate of the sensor response. A significant finding is that in higher ranges, optical enhancement does not always decrease but instead has additional plasmonic modes at greater nanowire and spacing dimensions resonant with the period of the structure and the incident light wavelength, making it possible to optimize enhancement in more accessibly fabricated nanowire array structures. This work also studies surface enhancement to optimize the geometries of plasmonic wires and oxide substrate thickness. Periodic oscillations of surface enhancement are observed at specific oxide thicknesses. These results will help improve future research by providing optimized geometries for SERS molecular sensors.
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Affiliation(s)
- Zachary T Brawley
- Microelectronics-Photonics Graduate Program, University of Arkansas, 731 W. Dickson St., Fayetteville, Arkansas, AR 72701, USA.
- Department of Physics, University of Arkansas, 825 W. Dickson St., Fayetteville, Arkansas, AR 72701, USA.
| | - Stephen J Bauman
- Microelectronics-Photonics Graduate Program, University of Arkansas, 731 W. Dickson St., Fayetteville, Arkansas, AR 72701, USA.
| | - Ahmad A Darweesh
- Microelectronics-Photonics Graduate Program, University of Arkansas, 731 W. Dickson St., Fayetteville, Arkansas, AR 72701, USA.
| | - Desalegn T Debu
- Department of Physics, University of Arkansas, 825 W. Dickson St., Fayetteville, Arkansas, AR 72701, USA.
| | - Faezeh Tork Ladani
- Department of Physics, University of Arkansas, 825 W. Dickson St., Fayetteville, Arkansas, AR 72701, USA.
| | - Joseph B Herzog
- Microelectronics-Photonics Graduate Program, University of Arkansas, 731 W. Dickson St., Fayetteville, Arkansas, AR 72701, USA.
- Department of Physics, University of Arkansas, 825 W. Dickson St., Fayetteville, Arkansas, AR 72701, USA.
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67
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Wan J, Zhu J, Zhong Y, Liu H. Semianalytical model for the electromagnetic enhancement by a rectangular nanowire optical antenna on metallic substrate. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2018; 35:880-889. [PMID: 29877330 DOI: 10.1364/josaa.35.000880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 04/13/2018] [Indexed: 06/08/2023]
Abstract
The electromagnetic enhancement by a metallic nanowire optical antenna on metallic substrate is investigated theoretically. By considering the excitation and multiple scattering of surface plasmon polaritons in the nanogap between the antenna and the substrate, we build up an intuitive and comprehensive model that provides semianalytical expressions for the electromagnetic field in the nanogap to achieve an understanding of the mechanism of electromagnetic enhancement. Our results show that antennas with short lengths that support the lowest order of resonance can achieve a high electric-field enhancement factor over a large range of incidence angles. Two phase-matching conditions are derived from the model for predicting the antenna lengths at resonance. Excitation of symmetric or antisymmetric localized surface plasmon resonance is further explained with the model. The model also shows superior computational efficiency compared to the full-wave numerical method when scanning the antenna length, the incidence angle, or the wavelength.
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68
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Chahinez D, Reji T, Andreas R. Modeling of the surface plasmon resonance tunability of silver/gold core-shell nanostructures. RSC Adv 2018; 8:19616-19626. [PMID: 35540971 PMCID: PMC9080668 DOI: 10.1039/c8ra03261k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 05/21/2018] [Indexed: 01/20/2023] Open
Abstract
Tunable plasmonic noble metal nanoparticles are indispensable for chemical sensors and optical near field enhancement applications. Laser wavelengths within the absorption spectrum of the nanoparticle and Localized Surface Plasmon Resonances (LSPR) in the visible and near infrared range are the key points to be met for the successful utilization in the field of aforementioned high sensitivity sensors. This way, Surface Enhanced Raman Spectroscopy (SERS) has been pushed to the sensitivity level of single molecule. The tunability, i.e. the modulation of the surface plasmon resonance wavelength as a function of the ambient refractive index is one of the important criteria to be understood clearly. Among various noble metals, gold and silver nanoparticles have the strongest surface enhancement factors for the Raman signal and their tunability for many practical applications has been experimentally demonstrated. We present a comprehensive numerical investigation by means of a finite element analysis on Ag/Au core-shell nanospheres including agglomerated and non-agglomerated dimers. Tunability as a function of shell thickness, total nanosphere radius and fraction of overlap between the dimer is discussed. Our studies show that tunability is considerably affected by the nanosphere radius rather than the shell thickness. These findings may be helpful in the synthesis of nanoplasmonic structures, especially related to an optimized use of gold as the shell material for the targeted application.
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Affiliation(s)
- Dab Chahinez
- Nanophotonics-Nanoelectronics, Institut National de la Recherche Scientifique INRS-EMT 1650 Boul. Lionel-Boulet Varennes J3X 1S2 Canada
| | - Thomas Reji
- Division of Research and Development, Lovely Professional University G.T. Road Phagwara Punjab 144411 India
| | - Ruediger Andreas
- Nanophotonics-Nanoelectronics, Institut National de la Recherche Scientifique INRS-EMT 1650 Boul. Lionel-Boulet Varennes J3X 1S2 Canada
- Department of Electrical Engineering and Information Technology, Université de Sherbrooke, 2500, Boul. Université Sherbrooke J1K 2R1 Canada
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69
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Bodelón G, Montes-García V, Pérez-Juste J, Pastoriza-Santos I. Surface-Enhanced Raman Scattering Spectroscopy for Label-Free Analysis of P. aeruginosa Quorum Sensing. Front Cell Infect Microbiol 2018; 8:143. [PMID: 29868499 PMCID: PMC5958199 DOI: 10.3389/fcimb.2018.00143] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 04/20/2018] [Indexed: 12/20/2022] Open
Abstract
Bacterial quorum sensing systems regulate the production of an ample variety of bioactive extracellular compounds that are involved in interspecies microbial interactions and in the interplay between the microbes and their hosts. The development of new approaches for enabling chemical detection of such cellular activities is important in order to gain new insight into their function and biological significance. In recent years, surface-enhanced Raman scattering (SERS) spectroscopy has emerged as an ultrasensitive analytical tool employing rationally designed plasmonic nanostructured substrates. This review highlights recent advances of SERS spectroscopy for label-free detection and imaging of quorum sensing-regulated processes in the human opportunistic pathogen Pseudomonas aeruginosa. We also briefly describe the challenges and limitations of the technique and conclude with a summary of future prospects for the field.
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Affiliation(s)
- Gustavo Bodelón
- Departamento de Química Física y Centro Singular de Investigaciones Biomédicas (CINBIO), Universidad de Vigo, Vigo, Spain
| | - Verónica Montes-García
- Departamento de Química Física y Centro Singular de Investigaciones Biomédicas (CINBIO), Universidad de Vigo, Vigo, Spain
| | - Jorge Pérez-Juste
- Departamento de Química Física y Centro Singular de Investigaciones Biomédicas (CINBIO), Universidad de Vigo, Vigo, Spain
| | - Isabel Pastoriza-Santos
- Departamento de Química Física y Centro Singular de Investigaciones Biomédicas (CINBIO), Universidad de Vigo, Vigo, Spain
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70
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Bigness A, Montgomery J. The Design and Optimization of Plasmonic Crystals for Surface Enhanced Raman Spectroscopy Using the Finite Difference Time Domain Method. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E672. [PMID: 29701635 PMCID: PMC5978049 DOI: 10.3390/ma11050672] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 04/19/2018] [Accepted: 04/24/2018] [Indexed: 11/16/2022]
Abstract
We present computational studies of quasi three-dimensional nanowell (NW) and nanopost (NP) plasmonic crystals for applications in surface enhanced Raman spectroscopy (SERS). The NW and NP plasmonic crystals are metal coated arrays of cylindrical voids or posts, respectively, in a dielectric substrate characterized by a well/post diameter (D), relief depth (R D), periodicity (P), and metal thickness (M T). Each plasmonic crystal is modeled using the three-dimensional finite-difference time-domain (FDTD) method with periodic boundary conditions in the x- and y-directions applied to a computational unit cell to simulate the effect of a periodic array. Relative SERS responses are calculated from time-averaged electric field intensity enhancements at λ exc and λ scat or at λ mid via G SERS 4 = g 2 ( λ exc ) × g 2 ( λ scat ) or G mid 4 = g 4 ( λ mid ) , respectively, where g 2 = | E | 2 / | E 0 | 2 . Comparisons of G SERS 4 and G mid 4 are made to previously reported experimental SERS measurements for NW and NP geometries. Optimized NW and NP configurations based on variations of D, P, R D, and M T using G SERS 4 are presented, with 6× and 2× predicted increases in SERS, respectively. A novel plasmonic crystal based on square NP geometries are considered with an additional 3× increase over the optimized cylindrical NP geometry. NW geometries with imbedded spherical gold nanoparticles are considered, with 10× to 10 3 × increases in SERS responses over the NW geometry alone. The results promote the use of FDTD as a viable in silico route to the design and optimization of SERS active devices.
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Affiliation(s)
- Alec Bigness
- Department of Chemistry, Biochemistry, and Physics, Florida Southern College, Lakeland, FL 33801, USA.
| | - Jason Montgomery
- Department of Chemistry, Biochemistry, and Physics, Florida Southern College, Lakeland, FL 33801, USA.
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71
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Jang Y, Lee N, Kim JH, Park YI, Piao Y. Shape-Controlled Synthesis of Au Nanostructures Using EDTA Tetrasodium Salt and Their Photothermal Therapy Applications. NANOMATERIALS 2018; 8:nano8040252. [PMID: 29670020 PMCID: PMC5923582 DOI: 10.3390/nano8040252] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 04/15/2018] [Accepted: 04/16/2018] [Indexed: 02/04/2023]
Abstract
Tuning the optical properties of Au nanostructures is of paramount importance for scientific interest and has a wide variety of applications. Since the surface plasmon resonance properties of Au nanostructures can be readily adjusted by changing their shape, many approaches for preparing Au nanostructures with various shapes have been reported to date. However, complicated steps or the addition of several reagents would be required to achieve shape control of Au nanostructures. The present work describes a facile and effective shape-controlled synthesis of Au nanostructures and their photothermal therapy applications. The preparation procedure involved the reaction of HAuCl4 and ethylenediaminetetraacetic acid (EDTA) tetrasodium salt, which acted as a reducing agent and ligand, at room temperature without the need for any toxic reagent or additives. The morphology control from spheres to branched forms and nanowire networks was easily achieved by varying the EDTA concentration. Detailed investigations revealed that the four carboxylic groups of the EDTA tetrasodium salt are essential for effective growth and stabilization. The produced Au nanowire networks exhibited a broad absorption band in the near-infrared (NIR) region, thereby showing efficient cancer therapeutic performance by inducing the selective photothermal destruction of cancerous glioblastoma cells (U87MG) under NIR irradiation.
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Affiliation(s)
- Youngjin Jang
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
| | - Nohyun Lee
- School of Advanced Materials Engineering, Kookmin University, Seoul 02707, Korea.
| | - Jeong Hyun Kim
- Center for Nanoparticle Research, Institute for Basic Science, and School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Korea.
| | - Yong Il Park
- School of Chemical Engineering, Chonnam National University, Gwangju 61186, Korea.
| | - Yuanzhe Piao
- Graduate School of Convergence Science and Technology & Advanced Institutes of Convergence Technology, Seoul National University, Suwon 16229, Korea.
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72
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Soltwisch V, Hönicke P, Kayser Y, Eilbracht J, Probst J, Scholze F, Beckhoff B. Element sensitive reconstruction of nanostructured surfaces with finite elements and grazing incidence soft X-ray fluorescence. NANOSCALE 2018; 10:6177-6185. [PMID: 29561052 DOI: 10.1039/c8nr00328a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The geometry of a Si3N4 lamellar grating was investigated experimentally with reference-free grazing-incidence X-ray fluorescence analysis. While simple layered systems are usually treated with the matrix formalism to determine the X-ray standing-wave field, this approach fails for laterally structured surfaces. Maxwell solvers based on finite elements are often used to model electrical field strengths for any 2D or 3D structures in the optical spectral range. We show that this approach can also be applied in the field of X-rays. The electrical field distribution obtained with the Maxwell solver can subsequently be used to calculate the fluorescence intensities in full analogy to the X-ray standing-wave field obtained by the matrix formalism. Only the effective 1D integration for the layer system has to be replaced by a 2D integration of the finite elements, taking into account the local excitation conditions. We will show that this approach is capable of reconstructing the geometric line shape of a structured surface with high elemental sensitivity. This combination of GIXRF and finite-element simulations paves the way for a versatile characterization of nanoscale-structured surfaces.
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Affiliation(s)
- Victor Soltwisch
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany.
| | - Philipp Hönicke
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany.
| | - Yves Kayser
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany.
| | - Janis Eilbracht
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany.
| | - Jürgen Probst
- Helmholtz-Zentrum Berlin (HZB), Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Frank Scholze
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany.
| | - Burkhard Beckhoff
- Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany.
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73
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Effects of nitrogen doping on surface-enhanced Raman scattering (SERS) performance of bicrystalline TiO 2 nanofibres. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2017.05.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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74
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Cai J, Hao C, Sun M, Ma W, Xu C, Kuang H. Chiral Shell Core-Satellite Nanostructures for Ultrasensitive Detection of Mycotoxin. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1703931. [PMID: 29424128 DOI: 10.1002/smll.201703931] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Revised: 01/03/2018] [Indexed: 06/08/2023]
Abstract
Herein, the design of a DNA-based chiral biosensor is described utilizing the self-assembly of shell core-gold (Au) satellite nanostructures for the detection of mycotoxin, ochratoxin A (OTA). The assembly of core-satellite nanostructures based on OTA-aptamer binding exhibits a strong chiral signal with an intense circular dichroism (CD) peak. The integrity of the assembly of core-satellite nanostructures is limited to some extent in the presence of different levels of OTA. Correspondingly, the chiral intensity of assembly is weakened with increasing OTA concentrations, allowing quantitative determination of the target. The developed chiral sensor shows an excellent linear relationship between the CD signal and concentrations of OTA in the range of 0.1-5 pg mL-1 with a limit of detection as low as 0.037 pg mL-1 . The effectiveness of the biosensor in a sample of red wine is verified and a good recovery rate is obtained. These results suggest that the strategy has great potential for practical application.
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Affiliation(s)
- Jiarong Cai
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Changlong Hao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Maozhong Sun
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Wei Ma
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Chuanlai Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
| | - Hua Kuang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu, 214122, P. R. China
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75
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Wei Y, Li L, Sun DX, Wang ML, Zhu YY. Density-matrix evaluation of the enhancement to resonant Raman scattering and fluorescence of molecules confined in metallic nanoparticle dimers. Sci Rep 2018; 8:1832. [PMID: 29382941 PMCID: PMC5789855 DOI: 10.1038/s41598-018-20328-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 01/16/2018] [Indexed: 11/09/2022] Open
Abstract
In the present work we study the surface-enhanced resonant Raman scattering (SERRS) and fluorescence (SEF) spectra of a general model molecule confined in metallic dimers consisting of Ag, Au and hybrid AuAg nanoparticles (NPs). The electromagnetic (EM) enhancement factors were simulated by the generalized Mie scatting method and the scattering cross section of the molecules were obtained by density-matrix calculations. The influence of the size of the NPs and the separation between the dimer on the Raman scattering and fluorescence were systematically studied and analyzed in detail. It was found that the SERRS mainly related to EM enhancement and the SEF depended on the competition between EM enhancement and quantum yield, both of which could be controlled by tuning the radius and separation of the metallic dimers. The optimal radius of the NPs for SERRS were found to be around 30 nm for AgNPs, 40 nm for AuNPs and 50 nm for hybrid AuAgNPs. The strongest Raman enhancement as predicted by the theoretical simulations were 6.2 × 1010, 1.5 × 107 and 5.2 × 108 for the three types of structures, respectively. These results could offer valuable information for the design of metallic substrates for surface enhanced Raman and fluorescence measurements.
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Affiliation(s)
- Yong Wei
- Hebei Key Laboratory of Microstructural Material Physics, School of Science, Yanshan University, Qinhuangdao, 066004, China
| | - Li Li
- Hebei Key Laboratory of Microstructural Material Physics, School of Science, Yanshan University, Qinhuangdao, 066004, China.
| | - De-Xian Sun
- Hebei Key Laboratory of Microstructural Material Physics, School of Science, Yanshan University, Qinhuangdao, 066004, China
| | - Ming-Li Wang
- Hebei Key Laboratory of Microstructural Material Physics, School of Science, Yanshan University, Qinhuangdao, 066004, China
| | - Yan-Ying Zhu
- Hebei Key Laboratory of Microstructural Material Physics, School of Science, Yanshan University, Qinhuangdao, 066004, China.
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76
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Min K, Choi KS, Jeon WJ, Lee DK, Oh S, Lee J, Choi JY, Yu HK. Hierarchical Ag nanostructures on Sn-doped indium oxide nano-branches: super-hydrophobic surface for surface-enhanced Raman scattering. RSC Adv 2018; 8:12927-12932. [PMID: 35541281 PMCID: PMC9079625 DOI: 10.1039/c8ra01510d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 03/27/2018] [Indexed: 02/02/2023] Open
Abstract
Herein, we fabricated a super-hydrophobic SERS substrate using Sn-doped indium oxide (Indium-tin-oxide: ITO) nano-branches as a template. ITO nano-branches with tens of nanometer diameter are first fabricated through the vapor–liquid–solid (VLS) growth to provide roughness of the substrate. 10 nm thickness of Ag thin film was deposited and then treated with the post-annealing process to create numerous air-pockets in the Ag film, forming a hierarchical Ag nanostructures. The resulting substrate obtained Cassie's wetting property with a water contact angle of 151°. Compared to the normal hydrophobic Ag nanoparticle substrate, increase of about 4.25-fold higher SERS signal was obtained for 7 μL of rhodamine 6G aqueous solutions. Herein, we fabricated a super-hydrophobic SERS substrate using Sn-doped indium oxide (Indium-tin-oxide: ITO) nano-branches as a template.![]()
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Affiliation(s)
- Kyungchan Min
- Dept. of Materials Science and Engineering & Dept. of Energy Systems Research
- Ajou University
- Suwon
- Korea
| | - Kyoung Soon Choi
- The Advanced Nano Surface Research Group
- Korea Basic Science Institute
- Daejeon 34144
- Korea
| | - Wook Jin Jeon
- Dept. of Materials Science and Engineering & Dept. of Energy Systems Research
- Ajou University
- Suwon
- Korea
| | - Dong Kyu Lee
- Dept. of Materials Science and Engineering & Dept. of Energy Systems Research
- Ajou University
- Suwon
- Korea
| | - Sein Oh
- Dept. of Materials Science and Engineering & Dept. of Energy Systems Research
- Ajou University
- Suwon
- Korea
| | - Jouhahn Lee
- The Advanced Nano Surface Research Group
- Korea Basic Science Institute
- Daejeon 34144
- Korea
| | - Jae-Young Choi
- School of Advanced Materials Science & Engineering
- School of Advanced Institute of Nanotechnology (SAINT)
- Sungkyunkwan University
- Suwon
- Korea
| | - Hak Ki Yu
- Dept. of Materials Science and Engineering & Dept. of Energy Systems Research
- Ajou University
- Suwon
- Korea
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77
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Wu TJ, Chiu HY, Yu J, Cautela MP, Sarmento B, das Neves J, Catala C, Pazos-Perez N, Guerrini L, Alvarez-Puebla RA, Vranješ-Đurić S, Ignjatović NL. Nanotechnologies for early diagnosis, in situ disease monitoring, and prevention. NANOTECHNOLOGIES IN PREVENTIVE AND REGENERATIVE MEDICINE 2018. [PMCID: PMC7156018 DOI: 10.1016/b978-0-323-48063-5.00001-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nanotechnology is an enabling technology with great potential for applications in stem cell research and regenerative medicine. Fluorescent nanodiamond (FND), an inherently biocompatible and nontoxic nanoparticle, is well suited for such applications. We had developed a prospective isolation method using CD157, CD45, and CD54 to obtain lung stem cells. Labeling of CD45−CD54+CD157+ cells with FNDs did not eliminate their abilities for self-renewal and differentiation. The FND labeling in combination with cell sorting, fluorescence lifetime imaging microscopy, and immunostaining identified transplanted stem cells allowed tracking of their engraftment and regenerative capabilities with single-cell resolution. Time-gated fluorescence (TGF) imaging in mouse tissue sections indicated that they reside preferentially at the bronchoalveolar junctions of lungs, especially in naphthalene-injured mice. Our results presented in Subchapter 1.1 demonstrate not only the remarkable homing capacity and regenerative potential of the isolated stem cells, but also the ability of finding rare lung stem cells in vivo using FNDs. The topical use of antiretroviral-based microbicides, namely of a dapivirine ring, has been recently shown to partially prevent transmission of HIV through the vaginal route. Among different formulation approaches, nanotechnology tools and principles have been used for the development of tentative vaginal and rectal microbicide products. Subchapter 1.2 provides an overview of antiretroviral drug nanocarriers as novel microbicide candidates and discusses recent and relevant research on the topic. Furthermore, advances in developing vaginal delivery platforms for the administration of promising antiretroviral drug nanocarriers are reviewed. Although mostly dedicated to the discussion of nanosystems for vaginal use, the development of rectal nanomicrobicides is also addressed. Infectious diseases are currently responsible for over 8 million deaths per year. Efficient treatments require accurate recognition of pathogens at low concentrations, which in the case of blood infection (septicemia) can go as low as 1 mL–1. Detecting and quantifying bacteria at such low concentrations is challenging and typically demands cultures of large samples of blood (∼1 mL) extending over 24–72 h. This delay seriously compromises the health of patients and is largely responsible for the death toll of bacterial infections. Recent advances in nanoscience, spectroscopy, plasmonics, and microfluidics allow for the development of optical devices capable of monitoring minute amounts of analytes in liquid samples. In Subchapter 1.3 we critically discuss these recent developments that will, in the future, enable the multiplex identification and quantification of microorganisms directly on their biological matrix with unprecedented speed, low cost, and sensitivity. Radiolabeled nanoparticles (NPs) are finding an increasing interest in a broad range of biomedical applications. They may be used to detect and characterize diseases, to deliver relevant therapeutics, and to study the pharmacokinetic/pharmacodynamic parameters of nanomaterials. The use of radiotracer techniques in the research of novel NPs offers many advantages, but there are still some limitations. The binding of radionuclides to NPs has to be irreversible to prevent their escape to other tissues or organs. Due to the short half-lives of radionuclides, the manufacturing process is time limited and difficult, and there is also a risk of contamination. Subchapter 1.4 presents the main selection criteria for radionuclides and applicable radiolabeling procedures used for the radiolabeling of various NPs. Also, an overview of different types of NPs that have so far been labeled with radionuclides is presented.
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Affiliation(s)
- Tsai-Jung Wu
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital, Kuei Shang, Taiwan
| | - Hsiao-Yu Chiu
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital, Kuei Shang, Taiwan,China Medical University, Taichung, Taiwan
| | - John Yu
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital, Kuei Shang, Taiwan,Institute of Cellular and Organismic Biology, Taipei, Taiwan
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78
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Cailletaud J, De Bleye C, Dumont E, Sacré PY, Netchacovitch L, Gut Y, Boiret M, Ginot YM, Hubert P, Ziemons E. Critical review of surface-enhanced Raman spectroscopy applications in the pharmaceutical field. J Pharm Biomed Anal 2018; 147:458-472. [DOI: 10.1016/j.jpba.2017.06.056] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 06/19/2017] [Accepted: 06/23/2017] [Indexed: 11/30/2022]
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79
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Weng Y, Li Z, Peng L, Zhang W, Chen G. Fabrication of carbon quantum dots with nano-defined position and pattern in one step via sugar-electron-beam writing. NANOSCALE 2017; 9:19263-19270. [PMID: 29188850 DOI: 10.1039/c7nr07892g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Quantum dots (QDs) are promising materials in nanophotonics, biological imaging, and even quantum computing. Precise positioning and patterning of QDs is a prerequisite for realizing their actual applications. Contrary to the traditional two discrete steps of fabricating and positioning QDs, herein, a novel sugar-electron-beam writing (SEW) method is reported for producing QDs via electron-beam lithography (EBL) that uses a carefully chosen synthetic resist, poly(2-(methacrylamido)glucopyranose) (PMAG). Carbon QDs (CQDs) could be fabricated in situ through electron beam exposure, and the nanoscale position and luminescence intensity of the produced CQDs could be precisely controlled without the assistance of any other fluorescent matter. We have demonstrated that upon combining an electron beam with a glycopolymer, in situ production of CQDs occurs at the electron beam spot center with nanoscale precision at any place and with any patterns, an advancement that we believe will stimulate innovations in future applications.
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Affiliation(s)
- Yuyan Weng
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou, 215006, China.
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80
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Wu Y, Li G, Camden JP. Probing Nanoparticle Plasmons with Electron Energy Loss Spectroscopy. Chem Rev 2017; 118:2994-3031. [DOI: 10.1021/acs.chemrev.7b00354] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yueying Wu
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Guoliang Li
- Center for Electron Microscopy, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Jon P. Camden
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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81
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Abstract
In the present study, zinc oxide (ZnO) nanorods (NRs) with a hexagonal structure have been synthesized via a hydrothermal method assisted by microwave radiation, using specialized cardboard materials as substrates. Cardboard-type substrates are cost-efficient and robust paper-based platforms that can be integrated into several opto-electronic applications for medical diagnostics, analysis and/or quality control devices. This class of substrates also enables highly-sensitive Raman molecular detection, amiable to several different operational environments and target surfaces. The structural characterization of the ZnO NR arrays has been carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical measurements. The effects of the synthesis time (5–30 min) and temperature (70–130 °C) of the ZnO NR arrays decorated with silver nanoparticles (AgNPs) have been investigated in view of their application for surface-enhanced Raman scattering (SERS) molecular detection. The size and density of the ZnO NRs, as well as those of the AgNPs, are shown to play a central role in the final SERS response. A Raman enhancement factor of 7 × 105 was obtained using rhodamine 6 G (R6G) as the test analyte; a ZnO NR array was produced for only 5 min at 70 °C. This condition presents higher ZnO NR and AgNP densities, thereby increasing the total number of plasmonic “hot-spots”, their volume coverage and the number of analyte molecules that are subject to enhanced sensing.
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82
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Yüksel S, Ziegler M, Goerke S, Huebner U, Weber K, Schaaf P, Meyer HG, Cialla-May D, Popp J. Hierarchically-Designed 3D Flower-Like Composite Nanostructures as an Ultrastable, Reproducible, and Sensitive SERS Substrate. ACS APPLIED MATERIALS & INTERFACES 2017; 9:38854-38862. [PMID: 29053250 DOI: 10.1021/acsami.7b14833] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is an attractive tool in the analytical sciences due to its high specificity and sensitivity. Because SERS-active substrates are only available as two-dimensional arrays, the fabrication of three-dimensional (3D) nanostructures allows for an increased number of hot spots in the focus volume, thus further amplifying the SERS signal. Although a great number of fabrication strategies for powerful SERS substrates exist, the generation of 3D nanostructures with high complexity and periodicity is still challenging. For this purpose, we report an easy fabrication technique for 3D nanostructures following a bottom-up preparation protocol. Enzymatically generated silver nanoparticles (EGNPs) are prepared, and the growth of hierarchically-designed 3D flower-like silica-silver composite nanostructures is induced by applying plasma-enhanced atomic layer deposition (PE-ALD) on the EGNPs. The morphology of these nanocomposites can be varied by changes in the PE-ALD cycle number, and a flower height of up to 10 μm is found. Moreover, the metallized (e.g., silver or gold) 3D nanostructures resulting from 135 PE-ALD cycles of silica creation provide highly reproducible SERS signals across the hydrophobic surface. Within this contribution, the morphological studies, optical properties, as well as the SERS response of these metallized silica-silver composite nanostructures applying vitamin B2 as a model analyte are introduced.
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Affiliation(s)
- Sezin Yüksel
- Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9, 07745 Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena , Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Forschungscampus Jena, Zentrum für Angewandte Forschung , Philosophenweg 7, 07743 Jena, Germany
| | - Mario Ziegler
- Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9, 07745 Jena, Germany
- Department of Electrical Engineering and Information Technology, Institute of Materials Science and Engineering and Institute of Micro and Nanotechnologies MacroNano, TU Ilmenau , Gustav-Kirchhoff-Str. 5, 98693 Ilmenau, Germany
| | - Sebastian Goerke
- Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Uwe Huebner
- Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Karina Weber
- Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9, 07745 Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena , Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Forschungscampus Jena, Zentrum für Angewandte Forschung , Philosophenweg 7, 07743 Jena, Germany
| | - Peter Schaaf
- Department of Electrical Engineering and Information Technology, Institute of Materials Science and Engineering and Institute of Micro and Nanotechnologies MacroNano, TU Ilmenau , Gustav-Kirchhoff-Str. 5, 98693 Ilmenau, Germany
| | - Hans-Georg Meyer
- Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Dana Cialla-May
- Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9, 07745 Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena , Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Forschungscampus Jena, Zentrum für Angewandte Forschung , Philosophenweg 7, 07743 Jena, Germany
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9, 07745 Jena, Germany
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena , Helmholtzweg 4, 07743 Jena, Germany
- InfectoGnostics Forschungscampus Jena, Zentrum für Angewandte Forschung , Philosophenweg 7, 07743 Jena, Germany
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83
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Mahigir A, Chang TW, Behnam A, Liu GL, Gartia MR, Veronis G. Plasmonic nanohole array for enhancing the SERS signal of a single layer of graphene in water. Sci Rep 2017; 7:14044. [PMID: 29070864 PMCID: PMC5656589 DOI: 10.1038/s41598-017-14369-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 10/09/2017] [Indexed: 11/09/2022] Open
Abstract
We numerically design and experimentally test a SERS-active substrate for enhancing the SERS signal of a single layer of graphene (SLG) in water. The SLG is placed on top of an array of silver-covered nanoholes in a polymer and is covered with water. Here we report a large enhancement of up to 2 × 105 in the SERS signal of the SLG on the patterned plasmonic nanostructure for a 532 nm excitation laser wavelength. We provide a detailed study of the light-graphene interactions by investigating the optical absorption in the SLG, the density of optical states at the location of the SLG, and the extraction efficiency of the SERS signal of the SLG. Our numerical calculations of both the excitation field and the emission rate enhancements support the experimental results. We find that the enhancement is due to the increase in the confinement of electromagnetic fields on the location of the SLG that results in enhanced light absorption in the graphene at the excitation wavelength. We also find that water droplets increase the density of optical radiative states at the location of the SLG, leading to enhanced spontaneous emission rate of graphene at its Raman emission wavelengths.
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Affiliation(s)
- Amirreza Mahigir
- School of Electrical Engineering and Computer Sciences, Louisiana State University, Baton Rouge, Louisiana, 70803, USA.,Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana, 70808, USA
| | - Te-Wei Chang
- Intel Corporation, Ronler Acres Campus, Hillsboro, Oregon, 97124, USA
| | - Ashkan Behnam
- Department of Electrical and Computer Engineering, University of Illinois at Urbana Champaign, Urbana, Illinois, 61801, USA
| | - Gang Logan Liu
- Department of Electrical and Computer Engineering, University of Illinois at Urbana Champaign, Urbana, Illinois, 61801, USA
| | - Manas Ranjan Gartia
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, Louisiana, 70803, USA.
| | - Georgios Veronis
- School of Electrical Engineering and Computer Sciences, Louisiana State University, Baton Rouge, Louisiana, 70803, USA. .,Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana, 70808, USA.
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84
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Basker DK, Saravanamuttu K. Spontaneous Formation of Fractal Aggregates of Au Nanoparticles in Epoxy-Siloxane Films and Their Application as Substrates for NIR Surface Enhanced Raman Spectroscopy. Polymers (Basel) 2017; 9:E507. [PMID: 30965810 PMCID: PMC6418541 DOI: 10.3390/polym9100507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/18/2017] [Accepted: 09/20/2017] [Indexed: 01/07/2023] Open
Abstract
We present a facile, inexpensive route to free-standing, thermo-mechanically robust and flexible epoxy-siloxane substrates embedded with fractal aggregates of Au nanoparticles, and demonstrate their efficiency as substrates for surface enhanced Raman spectroscopy (SERS) at NIR wavelengths. The metallodielectric films are prepared by generating Au nanoparticles through the in-situ reduction of gold (III) chloride trihydrate in epoxypropoxypropyl terminated polydimethyl siloxane (EDMS). The metal nanoparticles spontaneously aggregate into fractal structures in the colloid, which could then be drop-cast onto a substrate. Subsequent UV-initiated cationic polymerization of epoxide moieties in EDMS transforms the fluid colloid into a thin, free-standing film, which contains a dense distribution of fractal aggregates of Au nanoparticles. We used electron and optical microscopy as well as UV⁻Vis⁻NIR spectrometry to monitor the evolution of nanoparticles and to optically and structurally characterize the resulting films. Raman spectroscopy of the chromophore Eosin Y adsorbed onto the metallodielectric films showed that they are excellent SERS substrates at NIR excitation with an enhancement factor of ~9.3 × 10³.
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Affiliation(s)
- Dinesh K Basker
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. West, Hamilton, ON L8S 4M1, Canada.
| | - Kalaichelvi Saravanamuttu
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. West, Hamilton, ON L8S 4M1, Canada.
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85
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Herrmann JF, Kretschmer F, Hoeppener S, Höppener C, Schubert US. Ordered Arrangement and Optical Properties of Silica-Stabilized Gold Nanoparticle-PNIPAM Core-Satellite Clusters for Sensitive Raman Detection. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13. [PMID: 28834089 DOI: 10.1002/smll.201701095] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/14/2017] [Indexed: 05/12/2023]
Abstract
Gold-polymer hybrid nanoparticles attract wide interest as building blocks for the engineering of photonic materials and plasmonic (active) metamaterials with unique optical properties. In particular, the coupling of the localized surface plasmon resonances of individual metal nanostructures in the presence of nanometric gaps can generate highly enhanced and confined electromagnetic fields, which are frequently exploited for metal-enhanced light-matter interactions. The optical properties of plasmonic structures can be tuned over a wide range of properties by means of their geometry and the size of the inserted nanoparticles as well as by the degree of order upon assembly into 1D, 2D, or 3D structures. Here, the synthesis of silica-stabilized gold-poly(N-isopropylacrylamide) (SiO2 -Au-PNIPAM) core-satellite superclusters with a narrow size distribution and their incorporation into ordered self-organized 3D assemblies are reported. Significant alterations of the plasmon resonance are found for different assembled structures as well as strongly enhanced Raman signatures are observed. In a series of experiments, the origin of the highly enhanced signals can be assigned to the interlock areas of adjacent SiO2 -Au-PNIPAM core-satellite clusters and their application for highly sensitive nanoparticle-enhanced Raman spectroscopy is demonstrated.
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Affiliation(s)
- Janning F Herrmann
- Nanobiophotonics, Institute of Physics, University of Münster, Willhelm-Klemm-Str. 10, 48149, Münster, Germany
| | - Florian Kretschmer
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743, Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
| | - Stephanie Hoeppener
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743, Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
| | - Christiane Höppener
- Nanobiophotonics, Institute of Physics, University of Münster, Willhelm-Klemm-Str. 10, 48149, Münster, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743, Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
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86
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Jiang S, Chekini M, Qu ZB, Wang Y, Yeltik A, Liu Y, Kotlyar A, Zhang T, Li B, Demir HV, Kotov NA. Chiral Ceramic Nanoparticles and Peptide Catalysis. J Am Chem Soc 2017; 139:13701-13712. [PMID: 28803469 DOI: 10.1021/jacs.7b01445] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The chirality of nanoparticles (NPs) and their assemblies has been investigated predominantly for noble metals and II-VI semiconductors. However, ceramic NPs represent the majority of nanoscale materials in nature. The robustness and other innate properties of ceramics offer technological opportunities in catalysis, biomedical sciences, and optics. Here we report the preparation of chiral ceramic NPs, as represented by tungsten oxide hydrate, WO3-x·H2O, dispersed in ethanol. The chirality of the metal oxide core, with an average size of ca. 1.6 nm, is imparted by proline (Pro) and aspartic acid (Asp) ligands via bio-to-nano chirality transfer. The amino acids are attached to the NP surface through C-O-W linkages formed from dissociated carboxyl groups and through amino groups weakly coordinated to the NP surface. Surprisingly, the dominant circular dichroism bands for NPs coated by Pro and Asp are different despite the similarity in the geometry of the NPs; they are positioned at 400-700 nm and 500-1100 nm for Pro- and Asp-modified NPs, respectively. The differences in the spectral positions of the main chiroptical band for the two types of NPs are associated with the molecular binding of the two amino acids to the NP surface; Asp has one additional C-O-W linkage compared to Pro, resulting in stronger distortion of the inorganic crystal lattice and greater intensity of CD bands associated with the chirality of the inorganic core. The chirality of WO3-x·H2O atomic structure is confirmed by atomistic molecular dynamics simulations. The proximity of the amino acids to the mineral surface is associated with the catalytic abilities of WO3-x·H2O NPs. We found that NPs facilitate formation of peptide bonds, leading to Asp-Asp and Asp-Pro dipeptides. The chiroptical activity, chemical reactivity, and biocompatibility of tungsten oxide create a unique combination of properties relevant to chiral optics, chemical technologies, and biomedicine.
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Affiliation(s)
- Shuang Jiang
- School of Chemical Engineering and Technology, Tianjin Key Laboratory of Applied Catalysis Science and Technology, Tianjin University , Tianjin 300354, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300354, China.,Tianjin Engineering Research Center of Functional Fine Chemicals , Tianjin 300354, China
| | | | | | | | - Aydan Yeltik
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM, Bilkent University , 06800 Ankara, Turkey
| | - Yuangang Liu
- College of Chemical Engineering, Huaqiao University , Xiamen 361021, China
| | | | - Tianyong Zhang
- School of Chemical Engineering and Technology, Tianjin Key Laboratory of Applied Catalysis Science and Technology, Tianjin University , Tianjin 300354, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300354, China.,Tianjin Engineering Research Center of Functional Fine Chemicals , Tianjin 300354, China
| | - Bin Li
- School of Chemical Engineering and Technology, Tianjin Key Laboratory of Applied Catalysis Science and Technology, Tianjin University , Tianjin 300354, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300354, China.,Tianjin Engineering Research Center of Functional Fine Chemicals , Tianjin 300354, China
| | - Hilmi Volkan Demir
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM, Bilkent University , 06800 Ankara, Turkey.,School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays, Nanyang Technological University , 639798 Singapore
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87
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Zhou B, Gao Y, Wu X, Wen W. Control the drying configuration of suspensions via regulating the surface topologies for surface-enhanced Raman scattering optimization. J Colloid Interface Sci 2017; 502:67-76. [DOI: 10.1016/j.jcis.2017.04.090] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 04/01/2017] [Accepted: 04/27/2017] [Indexed: 12/12/2022]
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88
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Huang J, He Z, He X, Liu Y, Wang T, Chen G, Tang C, Jia R, Liu L, Zhang L, Wang J, Ai X, Sun S, Xu X, Du K. Island-like Nanoporous Gold: Smaller Island Generates Stronger Surface-Enhanced Raman Scattering. ACS APPLIED MATERIALS & INTERFACES 2017; 9:28902-28910. [PMID: 28771316 DOI: 10.1021/acsami.7b08013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The surface-enhanced Raman scattering properties of nanoporous gold prepared by the dealloying technique have been investigated for many years.The relatively low enhancement factor and the poor uniformity of existing conventional or advanced nanoporous gold structures are still the main factors that limit their wide application as Raman enhancement substrates. Here, we report island-like nanoporous gold (INPG) fabricated by simply controlling the composition of the dealloying precursor.This nanostructure can generate ∼10 times higher enhancement factor (above 107) with ∼4 times lower gold consumption than conventional nanoporous gold. The dimensions of the gold islands can be controlled by the composition of the precursor. The enhancement factor can therefore be controlled by the gold island dimensions, which suggests an effective approach to fabricate better Raman enhancement substrates. Furthermore, INPG exhibits excellent Raman enhancement uniformity and reproducibility with the relative standard deviations of only 2.5% and 6.5%, which originate from the extremely homogeneous structure of INPG at both the microscale and macroscale. The excellent surface-enhanced Raman scattering properties make INPG a potential surface-enhanced Raman scattering substrate.
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Affiliation(s)
- Jinglin Huang
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
| | - Zhibing He
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
| | - Xiaoshan He
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
| | - Yansong Liu
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
| | - Tao Wang
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
| | - Guo Chen
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
| | - Cuilan Tang
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
- School of Material Science and Engineering, Southwest University of Science and Technology , Mianyang 621010, P. R. China
| | - Ru Jia
- Analytic and Testing Center, Southwest University of Science and Technology , Mianyang 621010, P. R. China
| | - Lei Liu
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
- School of Material Science and Engineering, Southwest University of Science and Technology , Mianyang 621010, P. R. China
| | - Ling Zhang
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
| | - Jian Wang
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
| | - Xing Ai
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
| | - Shubing Sun
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
| | - Xiaoliang Xu
- School of Physical Sciences, University of Science and Technology of China , Hefei 230026, P. R. China
| | - Kai Du
- Research Center of Laser Fusion, China Academy of Engineering Physics , Mianyang 621900, P. R. China
- Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University , Shanghai 200240, P. R. China
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89
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Xie X, Pu H, Sun DW. Recent advances in nanofabrication techniques for SERS substrates and their applications in food safety analysis. Crit Rev Food Sci Nutr 2017; 58:2800-2813. [DOI: 10.1080/10408398.2017.1341866] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Xiaohui Xie
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
- Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods
| | - Hongbin Pu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
- Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China
- Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China
- Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods
- Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland
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90
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Real-Time and Tunable Substrate for Surface Enhanced Raman Spectroscopy by Synthesis of Copper Oxide Nanoparticles via Electrolysis. Sci Rep 2017; 7:7730. [PMID: 28798479 PMCID: PMC5552741 DOI: 10.1038/s41598-017-08199-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 07/10/2017] [Indexed: 11/25/2022] Open
Abstract
Here we show the capability of copper oxide (CuO) nanoparticles formed on copper (Cu) electrodes by the electrolysis as a real time active substrate for surface enhanced Raman scattering (SERS). We have experimentally found that using just the ultra pure water as the electrolyte and the Cu electrodes, ions are extracted from the copper anode form copper oxide nanoparticles on the anode surface in matter of minutes. Average particle size on the anode reaches to 100 nm in ninety seconds and grows to about 300 nm in five minutes. This anode is used in Raman experiments in real time as the nanoparticles were forming and the maximum enhancement factor (EF) of Raman signals were over five orders of magnitude. Other metal electrodes made of brass, zinc (Zn), silver (Ag) and aluminum (Al) were also tried for the anode material for a possible real-time substrate for SERS applications. Experimentally obtained enhancement factors were above five orders of magnitude for brass electrodes like the copper but for the other metals no enhancement is observed. Electron microscope images show the cubic nanoparticle formation on copper and brass electrodes but none in the other metals studied.
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91
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Substrate Oxide Layer Thickness Optimization for a Dual-Width Plasmonic Grating for Surface-Enhanced Raman Spectroscopy (SERS) Biosensor Applications. SENSORS 2017; 17:s17071530. [PMID: 28665308 PMCID: PMC5539500 DOI: 10.3390/s17071530] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 06/22/2017] [Accepted: 06/27/2017] [Indexed: 12/15/2022]
Abstract
This work investigates a new design for a plasmonic SERS biosensor via computational electromagnetic models. It utilizes a dual-width plasmonic grating design, which has two different metallic widths per grating period. These types of plasmonic gratings have shown larger optical enhancement than standard single-width gratings. The new structures have additional increased enhancement when the spacing between the metal decreases to sub-10 nm dimensions. This work integrates an oxide layer to improve the enhancement even further by carefully studying the effects of the substrate oxide thickness on the enhancement and reports ideal substrate parameters. The combined effects of varying the substrate and the grating geometry are studied to fully optimize the device’s enhancement for SERS biosensing and other plasmonic applications. The work reports the ideal widths and substrate thickness for both a standard and a dual-width plasmonic grating SERS biosensor. The ideal geometry, comprising a dual-width grating structure atop an optimal SiO2 layer thickness, improves the enhancement by 800%, as compared to non-optimized structures with a single-width grating and a non-optimal oxide thickness.
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92
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Review of SERS Substrates for Chemical Sensing. NANOMATERIALS 2017; 7:nano7060142. [PMID: 28594385 PMCID: PMC5485789 DOI: 10.3390/nano7060142] [Citation(s) in RCA: 262] [Impact Index Per Article: 37.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 06/02/2017] [Accepted: 06/06/2017] [Indexed: 12/21/2022]
Abstract
The SERS effect was initially discovered in the 1970s. Early research focused on understanding the phenomenon and increasing enhancement to achieve single molecule detection. From the mid-1980s to early 1990s, research started to move away from obtaining a fundamental understanding of the phenomenon to the exploration of analytical applications. At the same time, significant developments occurred in the field of photonics that led to the advent of inexpensive, robust, compact, field-deployable Raman systems. The 1990s also saw rapid development in nanoscience. This convergence of technologies (photonics and nanoscience) has led to accelerated development of SERS substrates to detect a wide range of chemical and biological analytes. It would be a monumental task to discuss all the different kinds of SERS substrates that have been explored. Likewise, it would be impossible to discuss the use of SERS for both chemical and biological detection. Instead, a review of the most common metallic (Ag, Cu, and Au) SERS substrates for chemical detection only is discussed, as well as SERS substrates that are commercially available. Other issues with SERS for chemical detection have been selectivity, reversibility, and reusability of the substrates. How these issues have been addressed is also discussed in this review.
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93
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Tycova A, Prikryl J, Foret F. Recent strategies toward microfluidic-based surface-enhanced Raman spectroscopy. Electrophoresis 2017; 38:1977-1987. [DOI: 10.1002/elps.201700046] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/20/2017] [Accepted: 04/18/2017] [Indexed: 12/25/2022]
Affiliation(s)
- Anna Tycova
- Institute of Analytical Chemistry of the CAS; v. v. i.; Brno Czech Republic
| | - Jan Prikryl
- Institute of Analytical Chemistry of the CAS; v. v. i.; Brno Czech Republic
| | - Frantisek Foret
- Institute of Analytical Chemistry of the CAS; v. v. i.; Brno Czech Republic
- CEITEC - Central European Institute of Technology; Brno Czech Republic
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94
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Liu C, Wang Z, Li E, Liang Z, Chakravarty S, Xu X, Wang AX, Chen RT, Fan D. Electrokinetic Manipulation Integrated Plasmonic-Photonic Hybrid Raman Nanosensors with Dually Enhanced Sensitivity. ACS Sens 2017; 2:346-353. [PMID: 28723214 DOI: 10.1021/acssensors.6b00586] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
To detect biochemicals with ultrahigh sensitivity, efficiency, reproducibility, and specificity has been the holy grail in the development of nanosensors. In this work, we report an innovative type of photonic-plasmonic hybrid Raman nanosensor integrated with electrokinetic manipulation by rational design, which offers dual mechanisms that enhance the sensitivity for molecule detection directly in solution. For the first time, we integrate large arrays of synthesized plasmonic nanocapsules with densely surface distributed silver (Ag) nanoparticles (NPs) on lithographically patterned photonic crystal slabs via electric-field assembling. With the interdigital microelectrodes, the applied electric fields not only assemble the hybrid plasmonic nanocapsules on photonic crystal slabs, but also generate electrokinetic flows that focus analyte molecules to the Ag hot spots on the nanocapsules for surface-enhanced Raman scattering (SERS) detection. The synergistic effects of plasmonic-photonic resonance and the electrokinetic molecular focusing can promote the SERS enhancement factor (EF) robustly to ∼2 × 109. Various molecules including SERS probing molecules, nucleobases, and unsafe food additives can be detected directly from suspension. The innovative mechanism, design, and fabrication reported in this work can inspire a new paradigm for achieving high-performance Raman nanosensors, which is pivotal for lab-on-chip disease diagnosis and environmental protection.
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Affiliation(s)
| | - Zheng Wang
- Department
of Electrical and Computer Engineering, The University of Texas at Austin, 10100 Burnet Road, MER 160, Austin, Texas 78758, United States
| | - Erwen Li
- School
of Electrical Engineering and Computer Science, Oregon State University, Corvallis, Oregon 97331, United States
| | | | - Swapnajit Chakravarty
- Omega Optics, Inc., 8500 Shoal
Creek Boulevard, Building 4, Suite 200, Austin, Texas 78757, United States
| | - Xiaochuan Xu
- Omega Optics, Inc., 8500 Shoal
Creek Boulevard, Building 4, Suite 200, Austin, Texas 78757, United States
| | - Alan X. Wang
- School
of Electrical Engineering and Computer Science, Oregon State University, Corvallis, Oregon 97331, United States
| | - Ray T. Chen
- Department
of Electrical and Computer Engineering, The University of Texas at Austin, 10100 Burnet Road, MER 160, Austin, Texas 78758, United States
| | - Donglei Fan
- Nova Minds LLC, 9535 Ketona Cv., Austin, Texas 78759, United States
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95
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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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96
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Yang Q, Loos K. Janus nanoparticles inside polymeric materials: interfacial arrangement toward functional hybrid materials. Polym Chem 2017. [DOI: 10.1039/c6py01795a] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent advances and successes in interfacial behavior of Janus NPs at interfaces are summarized, with the hope to motivate additional efforts in the studies of Janus NPs in polymer matrix for the design of functional hybrid nanostructures and devices with engineered, desired and tailored properties for real-life applications.
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Affiliation(s)
- Qiuyan Yang
- Macromolecular Chemistry & New Polymeric Materials
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Katja Loos
- Macromolecular Chemistry & New Polymeric Materials
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
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97
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Rajput A, Kumar S, Singh JP. Vertically standing nanoporous Al–Ag zig-zag silver nanorod arrays for highly active SERS substrates. Analyst 2017; 142:3959-3966. [DOI: 10.1039/c7an00851a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We have demonstrated a simple de-alloying method to create nanogaps in a vertically standing zigzag AgNR arrays which act as SERS active hot spots for better SERS sensitivity.
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Affiliation(s)
- Ankita Rajput
- Department of Physics
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Samir Kumar
- Department of Physics
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Jitendra P. Singh
- Department of Physics
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
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98
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Yang Q, Loos K. Design and Fabrication of Janus Nanoparticles for Interfacial Distribution in Block Copolymers. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600451] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Qiuyan Yang
- Macromolecular Chemistry and New Polymeric Materials; Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Katja Loos
- Macromolecular Chemistry and New Polymeric Materials; Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
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99
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Zeng Z, Liu L, Wang Y, Zhou Q, Su S, Hu D, Han B, Jin M, Ao X, Zhan R, Gao X, Lu X, Zhou G, Senz S, Zhang Z, Liu J. Highly reproducible surface-enhanced Raman scattering substrate for detection of phenolic pollutants. NANOTECHNOLOGY 2016; 27:455301. [PMID: 27698285 DOI: 10.1088/0957-4484/27/45/455301] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The ordering degree of nanostructures is the key to determining the uniformity of surface-enhanced Raman scattering (SERS). However, fabrication of large-area ordered nanostructures remains a challenge, especially with the ultrahigh-density (>1010 cm-2). Here, we report a fabrication of large-area ultrahigh-density ordered Ag@Al2O3/Ag core-shell nanosphere (NS) arrays with tunable nanostructures. The ultrahigh-density (2.8 × 1010 cm-2) ordered NS arrays over a large-area capability (diameter >4.0 cm) enable the uniform SERS signals with the relative standard deviation of less than 5%. The as-fabricated highly reproducible SERS substrate can be applied to detect trace phenolic pollutants in water. This work does not only provide a new route for synthesizing the ultrahigh-density ordered nanostructures, but also create a new class of SERS substrates with high sensitivity and excellent reproducibility.
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Affiliation(s)
- Zhiqiang Zeng
- Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, People's Republic of China
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100
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Mengesha ZT, Yang J. Silver Nanoparticle-Decorated Shape-Memory Polystyrene Sheets as Highly Sensitive Surface-Enhanced Raman Scattering Substrates with a Thermally Inducible Hot Spot Effect. Anal Chem 2016; 88:10908-10915. [DOI: 10.1021/acs.analchem.6b02256] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Jyisy Yang
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan
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