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Hossain MK, Drmosh QA, Mohamedkhair AK. Plasmonic Pollen Grain Nanostructures: A Three-Dimensional Surface-Enhanced Raman Scattering (SERS)-Active Substrate. Chem Asian J 2021; 16:1807-1819. [PMID: 34009749 DOI: 10.1002/asia.202100386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/11/2021] [Indexed: 12/14/2022]
Abstract
A new route has been developed to design plasmonic pollen grain-like nanostructures (PGNSs) as surface-enhanced Raman scattering (SERS)-active substrate. The nanostructures consisting of silver (Ag) and gold (Au) nanoparticles along with zinc oxide (ZnO) nanoclusters as spacers were found highly SERS-active. The morphology of PGNSs and those obtained in the intermediate stage along with each elemental evolution has been investigated by a high-resolution field emission scanning electron microscopy. The optical band gaps and crystal structure have been identified by UV-vis absorption and X-ray powder diffraction (XRD) measurements, respectively. For PGNSs specimen, three distinct absorption bands related to constituent elements Ag, Au, and ZnO were observed, whereas XRD peaks confirmed the existence of Ag, Au, and ZnO within the composition of PGNSs. SERS-activity of PGNSs was confirmed using Rhodamine 6G (R6G) as Raman-active dyes. Air-cooled solid-state laser kits of 532 nm were used as excitation sources in SERS measurements. SERS enhancement factor was estimated for PGNSs specimen and was found as high as 3.5×106 . Finite difference time domain analysis was carried out to correlate the electromagnetic (EM) near-field distributions with the experiment results achieved under this investigation. EM near-field distributions at different planes were extracted for s-, p- and 45° of incident polarizations. EM near-field distributions for such nanostructures as well as current density distributions under different circumstances were demonstrated and plausible scenarios were elucidated given SERS enhancements. Such generic fabrication route as well as correlated investigation is not only indispensable to realize the potential of SERS applications but also unveil the underneath plasmonic characteristics of complex SERS-active nanostructures.
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Affiliation(s)
- Mohammad Kamal Hossain
- Interdisciplinary Research Center for Renewable Energy and Power System (IRC-REPS), King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi Arabia
| | - Qasem Ahmed Drmosh
- Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi Arabia
| | - Amar Kamal Mohamedkhair
- Physics Department, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia
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2
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Yang L, Ren Z, Zhang M, Song Y, Li P, Qiu Y, Deng P, Li Z. Three-dimensional porous SERS powder for sensitive liquid and gas detections fabricated by engineering dense "hot spots" on silica aerogel. NANOSCALE ADVANCES 2021; 3:1012-1018. [PMID: 36133286 PMCID: PMC9418486 DOI: 10.1039/d0na00849d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 11/30/2020] [Indexed: 06/16/2023]
Abstract
A three-dimensional porous SERS powder material, Ag nanoparticles-engineered-silica aerogel, was developed. Utilizing an in situ chemical reduction strategy, Ag nanoparticles were densely assembled on porous aerogel structures, thus forming three-dimensional "hot spots" distribution with intrinsic large specific surface area and high porosity. These features can effectively enrich the analytes on the metal surface and provide huge near field enhancement. Highly sensitive and homogeneous SERS detections were achieved not only on the conventional liquid analytes but also on gas with the enhancement factor up to ∼108 and relative standard deviation as small as ∼13%. Robust calibration curves were obtained from the SERS data, which demonstrates the potential for the quantification analysis. Moreover, the powder shows extraordinary SERS stability than the conventional Ag nanostructures, which makes long term storage and convenient usage feasible. With all of these advantages, the porous SERS powder material can be extended to on-site SERS "nose" applications such as liquid and gas detections for chemical analysis, environmental monitoring, and anti-terrorism.
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Affiliation(s)
- Longkun Yang
- The Beijing Key Laboratory for Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University Beijing 100048 P. R. China
| | - Zhifang Ren
- The Beijing Key Laboratory for Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University Beijing 100048 P. R. China
| | - Meng Zhang
- The Beijing Key Laboratory for Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University Beijing 100048 P. R. China
| | - Yanli Song
- The Beijing Key Laboratory for Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University Beijing 100048 P. R. China
| | - Pan Li
- The Beijing Key Laboratory for Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University Beijing 100048 P. R. China
- Beijing Center for Physical and Chemical Analysis, Beijing Academy of Science and Technology Beijing 100089 P. R. China
| | - Yun Qiu
- The Beijing Key Laboratory for Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University Beijing 100048 P. R. China
| | - Pingye Deng
- Beijing Center for Physical and Chemical Analysis, Beijing Academy of Science and Technology Beijing 100089 P. R. China
| | - Zhipeng Li
- The Beijing Key Laboratory for Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University Beijing 100048 P. R. China
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Quasi-3D Plasmonic Nanowell Array for Molecular Enrichment and SERS-Based Detection. NANOMATERIALS 2020; 10:nano10050939. [PMID: 32422860 PMCID: PMC7279529 DOI: 10.3390/nano10050939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/29/2020] [Accepted: 04/29/2020] [Indexed: 11/17/2022]
Abstract
We report on a quasi-three-dimensional (3D) plasmonic nanowell array with high structural uniformity for molecular detection. The quasi-3D plasmonic nanowell array was composed of periodic hexagonal Au nanowells whose surface is densely covered with gold nanoparticles (Au NPs), separated by an ultrathin dielectric interlayer. The uniform array of the Au nanowells was fabricated by nanoimprint lithography and deposition of Au thin film. A self-assembled monolayer (SAM) of perfluorodecanethiol (PFDT) was coated on the Au surface, on which Au was further deposited. Interestingly, the PFDT-coated Au nanowells were fully covered with Au NPs with an ultra-high density of 375 μm-2 rather than a smooth film due to the anti-wetting property of the low-energy surface. The plasmonic nanogaps formed among the high-density Au NPs led to a strong near-field enhancement via coupled localized surface plasmon resonance and produced a uniform surface-enhanced Raman spectroscopy (SERS) response with a small relative standard deviation of 5.3%. Importantly, the highly uniform nanostructure, featured by the nanoimprint lithography and 3D growth of densely-packed Au NPs, minimizes the spatial variation of Raman intensity, potentially providing quantitative analysis. Moreover, analyte molecules were highly concentrated and selectively deposited in nanowells when a water droplet containing the analyte was evaporated on the plasmonic substrate. The analyte formed a relatively thick overcoat in the nanowells near the triple line due to the coffee-ring effects. Combining 3D plasmonic nanowell substrates with molecular enrichments, highly sensitive detection of lactic acid was demonstrated. Given its combination of high sensitivity and signal uniformity, the quasi-3D plasmonic nanowell substrate is expected to provide a superior molecular detection platform for biosensing applications.
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Roy A, Satpati B. Metal Nanoparticle-Decorated Silicon Nanowire Arrays on Silicon Substrate and their Applications. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2019; 25:1407-1415. [PMID: 31514761 DOI: 10.1017/s1431927619014946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Herein, we report an efficient method to produce silver (Ag) nanoparticle-decorated silicon (Si) nanowire (NW) arrays on a pyramidal Si (P-Si) substrate by using a pure chemical method and rapid thermal annealing in different atmospheres. A metal-assisted chemical etching technique was used to produce vertical Si NW arrays on pyramidal Si. The etching was observed to be heavily dependent on the substrate type. On planar Si (100), the etching was observed to occur in a uniform manner. However, the etching rate was observed to increase from the top to the base of the Si pyramid. The Si NWs produced from P-Si have zig-zag sidewalls as observed from high-resolution transmission electron microscopy images. However, for the same oxidant concentration, Si NWs produced from planar Si (100) consist of straight and amorphous sidewalls. Local variation of oxidant concentration is responsible for the formation of different sidewalls. The substrates are both surface-enhanced Raman scattering (SERS) active and hydrophobic. The hydrophobicity is due to the dual scale of roughness contributed to by both pyramidal and NW structures. Finite-difference time-domain simulation shows that the gap between two Ag spheres and also the gap between Si NWs and Ag spheres contributed to SERS enhancement.
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Affiliation(s)
- Abhijit Roy
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - Biswarup Satpati
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhannagar, Kolkata 700064, India
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Galeotti F, Pisco M, Cusano A. Self-assembly on optical fibers: a powerful nanofabrication tool for next generation "lab-on-fiber" optrodes. NANOSCALE 2018; 10:22673-22700. [PMID: 30500026 DOI: 10.1039/c8nr06002a] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Self-assembly offers a unique resource for the preparation of discrete structures at the nano- and microscale, which are either not accessible by other fabrication techniques or require highly expensive and technologically demanding processes. The possibility of obtaining spontaneous organization of separated components, whether they are molecules, polymers, nano- or micro-objects, into a larger functional unit, enables the development of ready-to-use plug and play devices and components at lower costs. Expanding the applicability of self-assembly approaches at the nanoscale to non-conventional substrates would open up new avenues towards multifunctional platforms customized for specific applications. Recently, the combination of the amazing morphological and optical features of self-assembled patterns with the intrinsic properties of optical fibers to conduct light to a remote location has demonstrated the potentiality to open up new intriguing scenarios featuring unprecedented functionalities and performances. The integration of advanced materials and structures at the nanoscale with optical fiber substrates is the idea behind the so-called lab-on-fiber technology, which is an emerging technology at the forefront of nanophotonics and nanotechnology research. Self-assembly processes can have a key role in implementing cost-effective solutions suitable for the mass production of technologically advanced platforms based on optical fibers towards their real market exploitation. Novel lab-on-fiber optrodes would arise from the sustainable integration of functional materials at the nano- and microscale onto optical fiber substrates. Such devices are able to be easily integrated in hypodermic needles and catheters for in vivo theranostics and point-of-care diagnostics, opening up new frontiers in multidisciplinary technological development to be exploited in life science applications. This work is conceived to provide an overview of the latest strategies, based on self-assembly processes, which have been implemented for the realization of lab-on-fiber optrodes with particular emphasis on the perspectives and challenges that lie ahead. We discuss the main fabrication techniques and strategies aimed at developing new multifunctional optical fiber nanoprobes and their application in real scenarios. Finally, we highlight some of the other self-assembly processes that have not yet been applied to optical fiber sensors, but have the potentiality to be exploited in the fabrication of future lab-on-fiber devices.
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Affiliation(s)
- F Galeotti
- Istituto per lo Studio delle Macromolecole, Consiglio Nazionale delle Ricerche (ISMAC-CNR), 20133 Milano, Italy.
| | - M Pisco
- Divisione di Optoelettronica, Dipartimento di Ingegneria, Università del Sannio, 82100 Benevento, Italy.
| | - A Cusano
- Divisione di Optoelettronica, Dipartimento di Ingegneria, Università del Sannio, 82100 Benevento, Italy.
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Koh EH, Mun C, Kim C, Park SG, Choi EJ, Kim SH, Dang J, Choo J, Oh JW, Kim DH, Jung HS. M13 Bacteriophage/Silver Nanowire Surface-Enhanced Raman Scattering Sensor for Sensitive and Selective Pesticide Detection. ACS APPLIED MATERIALS & INTERFACES 2018; 10:10388-10397. [PMID: 29505228 DOI: 10.1021/acsami.8b01470] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A surface-enhanced Raman scattering (SERS) sensor comprising silver nanowires (AgNWs) and genetically engineered M13 bacteriophages expressing a tryptophan-histidine-tryptophan (WHW) peptide sequence (BPWHW) was fabricated by simple mixing of BPWHW and AgNW solutions, followed by vacuum filtration onto a glass-fiber filter paper (GFFP) membrane. The AgNWs stacked on the GFFP formed a high density of SERS-active hot spots at the points of nanowire intersections, and the surface-coated BPWHW functioned as a bioreceptor for selective pesticide detection. The BPWHW-functionalized AgNW (BPWHW/AgNW) sensor was characterized by scanning electron microscopy, confocal scanning fluorescence microscopy, atomic force microscopy, and Fourier transform infrared spectroscopy. The Raman signal enhancement and the selective pesticide SERS detection properties of the BPWHW/AgNW sensor were investigated in the presence of control substrates such as wild-type M13 bacteriophage-decorated AgNWs (BPWT/AgNW) and undecorated AgNWs (AgNW). The BPWHW/AgNW sensor exhibited a significantly higher capture capability for pesticides, especially paraquat (PQ), than the control SERS substrates, and it also showed a relatively higher selectivity for PQ than for other bipyridylium pesticides such as diquat and difenzoquat. Furthermore, as a field application test, PQ was detected on the surface of PQ-pretreated apple peels, and the results demonstrated the feasibility of using a paper-based SERS substrate for on-site residual pesticide detection. The developed M13 bacteriophage-functionalized AgNW SERS sensor might be applicable for the detection of various pesticides and chemicals through modification of the M13 bacteriophage surface peptide sequence.
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Affiliation(s)
- Eun Hye Koh
- Advanced Functional Thin Films Department , Korea Institute of Materials Science (KIMS) , Changwon , Gyeongnam 51508 , Republic of Korea
- Department of Nano Fusion Technology , Pusan National University (PNU) , Busan 46241 , Republic of Korea
| | - ChaeWon Mun
- Advanced Functional Thin Films Department , Korea Institute of Materials Science (KIMS) , Changwon , Gyeongnam 51508 , Republic of Korea
| | - ChunTae Kim
- Department of Nano Fusion Technology , Pusan National University (PNU) , Busan 46241 , Republic of Korea
| | - Sung-Gyu Park
- Advanced Functional Thin Films Department , Korea Institute of Materials Science (KIMS) , Changwon , Gyeongnam 51508 , Republic of Korea
| | - Eun Jung Choi
- Department of Nano Fusion Technology , Pusan National University (PNU) , Busan 46241 , Republic of Korea
| | - Sun Ho Kim
- Advanced Functional Thin Films Department , Korea Institute of Materials Science (KIMS) , Changwon , Gyeongnam 51508 , Republic of Korea
| | - Jaejeung Dang
- Department of Bionano Technology , Hanyang University , Ansan 426-791 , Republic of Korea
| | - Jaebum Choo
- Department of Bionano Technology , Hanyang University , Ansan 426-791 , Republic of Korea
| | - Jin-Woo Oh
- Department of Nano Fusion Technology , Pusan National University (PNU) , Busan 46241 , Republic of Korea
| | - Dong-Ho Kim
- Advanced Functional Thin Films Department , Korea Institute of Materials Science (KIMS) , Changwon , Gyeongnam 51508 , Republic of Korea
| | - Ho Sang Jung
- Advanced Functional Thin Films Department , Korea Institute of Materials Science (KIMS) , Changwon , Gyeongnam 51508 , Republic of Korea
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Yang C, Chen Y, Liu D, Chen C, Wang J, Fan Y, Huang S, Lei W. Nanocavity-in-Multiple Nanogap Plasmonic Coupling Effects from Vertical Sandwich-Like Au@Al 2O 3@Au Arrays for Surface-Enhanced Raman Scattering. ACS APPLIED MATERIALS & INTERFACES 2018; 10:8317-8323. [PMID: 29441776 DOI: 10.1021/acsami.7b17228] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The development of ideal three-dimensional (3D) tailorable surface-enhanced Raman scattering (SERS) substrates with the properties of timesaving, large area, high throughput, single or few molecules detection, reproducibility, reusable ability, and high density of "hot spots" has been the mainstream challenge and the robust task. Here, we construct perpendicular sandwich-like Au@Al2O3@Au hybrid nanosheets (PSHNs) on the Al foil as a 3D flexible substrate for SERS. The design of 3D PSHNs incorporates several advantageous aspects for SERS to enhance the performance of plasmonic diamers via bifunctions of vertical Al2O3 nanosheets (NSs) including the nanoscaffold and nanobaffle plate effects. As a nanoscaffold, it increases the space utilization of Au-Au diamers, whereas as a nanobaffle, it forms densely homogeneous Au@Al2O3@Au nanojunctions by sub-4 nm thickness of Al2O3 NSs as the dielectric isolated layer for the double-sided exposure of slitlike surface plasmon resonance. The optimized PSHN substrate exhibits a fascinating SERS sensitivity with an experimental enhancement factor of 1012 and is able to detect rhodamine B at an extremely low concentration up to the limit of single or few molecules (10-18 M), as well as can be recycled without the loss of SERS enhancement via the simple impregnation process. These advantages will greatly facilitate the wider use of SERS in many fields.
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Affiliation(s)
- Chen Yang
- Institute for Frontier Materials , Deakin University , Locked Bag 2000 , Geelong , Victoria 3220 , Australia
| | - Ying Chen
- Institute for Frontier Materials , Deakin University , Locked Bag 2000 , Geelong , Victoria 3220 , Australia
| | - Dan Liu
- Institute for Frontier Materials , Deakin University , Locked Bag 2000 , Geelong , Victoria 3220 , Australia
| | - Cheng Chen
- Institute for Frontier Materials , Deakin University , Locked Bag 2000 , Geelong , Victoria 3220 , Australia
| | - Jiemin Wang
- Institute for Frontier Materials , Deakin University , Locked Bag 2000 , Geelong , Victoria 3220 , Australia
| | - Ye Fan
- Institute for Frontier Materials , Deakin University , Locked Bag 2000 , Geelong , Victoria 3220 , Australia
| | - Shaoming Huang
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering , Wenzhou University , Wenzhou 325035 , P. R. China
| | - Weiwei Lei
- Institute for Frontier Materials , Deakin University , Locked Bag 2000 , Geelong , Victoria 3220 , Australia
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Roy A, Maiti A, Chini TK, Satpati B. Annealing Induced Morphology of Silver Nanoparticles on Pyramidal Silicon Surface and Their Application to Surface-Enhanced Raman Scattering. ACS APPLIED MATERIALS & INTERFACES 2017; 9:34405-34415. [PMID: 28901125 DOI: 10.1021/acsami.7b08493] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
This paper reports on a simple and cost-effective process of developing a stable surface-enhanced Raman scattering (SERS) substrate based on silver (Ag) nanoparticles deposited on silicon (Si) surface. Durability is an important issue for preparing SERS active substrate as silver nanostructures are prone to rapid surface oxidation when exposed to ambient conditions, which may result in the loss of the enhancement capabilities in a short period of time. Here, we employ the galvanic displacement method to produce Ag nanoparticles on Si(100) substrate prepatterned with arrays of micropyramids by chemical etching, and subsequently, separate pieces of such substrates were annealed in oxygen and nitrogen environments at 550 °C. Interestingly, while nitrogen-annealed Si substrates were featured by spherical-shaped Ag particles, the oxygen annealed Si substrates were dominated by the formation of triangular shape particles attached with the spherical one. Remarkably, the oxygen-annealed substrate thus produced shows very high SERS enhancement compared to the either unannealed or nitrogen annealed substrate. The hitherto unobserved coexistence of triangular morphology with the spherical one and the gap between the two (source of efficient hot-spots) are the origin of enhanced SERS activity for the oxygen-annealed Ag particle-covered Si substrate as probed by the combined finite-difference time domain (FDTD) simulation and cathodoluminesensce (CL) experiment. As the substrate has already been annealed in an oxygen environment, further probability of oxidation is reduced in the present synthesis protocol that paves the way for making a novel long-lived thermally stable SERS substrate.
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Affiliation(s)
- Abhijit Roy
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics , HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - Arpan Maiti
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics , HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - Tapas Kumar Chini
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics , HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - Biswarup Satpati
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics , HBNI, 1/AF Bidhannagar, Kolkata 700064, India
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