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Chen WS, Lee YC. Bi-Layer nanoimprinting lithography for metal-assisted chemical etching with application on silicon mold replication. Nanotechnology 2023; 34:505301. [PMID: 37703872 DOI: 10.1088/1361-6528/acf93c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Accepted: 09/12/2023] [Indexed: 09/15/2023]
Abstract
This paper reports a new type of nanoimprinting method called Bi-layer nanoimprinting lithography (BL-NIL), which can work along with metal-assisted chemical etching (MaCE) for fabricating nanostructures on silicon. In contrast to conventional nanoimprinting techniques, BL-NIL adds an interposing layer between the imprinting resist layer and silicon substrate. After the standard imprinting process, dry etching was used to etch away the residual imprinting layer and part of the interposing layer. Finally, the remaining interposing layer was wet-etched using its remover. This innovative approach can ensure cleanliness at the metal/silicon interface after metal lift-off processes, and therefore guarantees the success of MaCE. By combining BL-NIL and MaCE, expensive silicon molds with sub-micrometer/nanometer-scale feature sizes can be easily replicated and preserved. This is important for the application of nanoimprinting technologies in industrial manufacturing.
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Affiliation(s)
- Wei-Shen Chen
- Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - Yung-Chun Lee
- Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
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2
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Vasileva AA, Mamonova DV, Mikhailovskii V, Petrov YV, Toropova YG, Kolesnikov IE, Leuchs G, Manshina AA. 3D Nanocomposite with High Aspect Ratio Based on Polyaniline Decorated with Silver NPs: Synthesis and Application as Electrochemical Glucose Sensor. Nanomaterials (Basel) 2023; 13:1002. [PMID: 36985896 PMCID: PMC10058674 DOI: 10.3390/nano13061002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/03/2023] [Accepted: 03/07/2023] [Indexed: 06/18/2023]
Abstract
In this paper, we present a new methodology for creating 3D ordered porous nanocomposites based on anodic aluminum oxide template with polyaniline (PANI) and silver NPs. The approach includes in situ synthesis of polyaniline on templates of anodic aluminum oxide nanomembranes and laser-induced deposition (LID) of Ag NPs directly on the pore walls. The proposed method allows for the formation of structures with a high aspect ratio of the pores, topological ordering and uniformity of properties throughout the sample, and a high specific surface area. For the developed structures, we demonstrated their effectiveness as non-enzymatic electrochemical sensors on glucose in a concentration range crucial for medical applications. The obtained systems possess high potential for miniaturization and were applied to glucose detection in real objects-laboratory rat blood plasma.
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Affiliation(s)
- Anna A. Vasileva
- Institute of Chemistry, Saint-Petersburg State University, Ulyanovskaya st. 5, Saint-Petersburg 198504, Russia
| | - Daria V. Mamonova
- Institute of Chemistry, Saint-Petersburg State University, Ulyanovskaya st. 5, Saint-Petersburg 198504, Russia
| | - Vladimir Mikhailovskii
- Interdisciplinary Resource Center for Nanotechnology, Research Park, Saint-Petersburg State University, Ulyanovskaya 1, Saint-Petersburg 198504, Russia
| | - Yuri V. Petrov
- Department of Physics, Saint-Petersburg State University, Ulyanovskaya st. 3, Saint-Petersburg 198504, Russia
| | - Yana G. Toropova
- Almazov National Medical Research Centre, Akkuratova st. 2, Saint-Petersburg 197341, Russia
| | - Ilya E. Kolesnikov
- Center for Optical and Laser Materials Research, Saint-Petersburg State University, Ulyanovskaya 5, Saint-Petersburg 198504, Russia
| | - Gerd Leuchs
- Max Planck Institute for the Science of Light, Staudtstr. 2, 91058 Erlangen, Germany
- Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr. 7/B2, 91058 Erlangen, Germany
| | - Alina A. Manshina
- Institute of Chemistry, Saint-Petersburg State University, Ulyanovskaya st. 5, Saint-Petersburg 198504, Russia
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3
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Butmee P, Samphao A, Tumcharern G. Reduced graphene oxide on silver nanoparticle layers-decorated titanium dioxide nanotube arrays as SERS-based sensor for glyphosate direct detection in environmental water and soil. J Hazard Mater 2022; 437:129344. [PMID: 35753303 DOI: 10.1016/j.jhazmat.2022.129344] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 06/04/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
When glyphosate, a widely used organophosphate herbicide in agricultural applications, contaminates the environment, it could lead to chronic harm to human health. Herein, an efficient, air-stable and reusable surface-enhanced Raman scattering (SERS) substrate was designed to be an analytical tool for direct determination of glyphosate. A vertical heterostructure of reduced graphene oxide (rGO)-wrapped dual-layers silver nanoparticles (AgNPs) on titania nanotube (TiO2 NTs) arrays was constructed as a SERS substrate. The TiO2 NTs/AgNPs-rGO exhibited high SERS performance for methylene blue detection, offering an analytical enhancement factor (AEF) as large as 7.1 × 108 and the limit of detection (LOD) as low as 10-14 M with repeatability of 4.4 % relative standard deviation (RSD) and reproducibility of 2.0 % RSD. The sensor was stable in ambient and was reusable after photo-degradation. The designed sensor was successfully applied for glyphosate detection with a LOD of 3 µg/L, which is below the maximum contaminant level of glyphosate in environmental water, as recommended by the U.S. EPA and the European Union. A uniqueness of this study is that there is no significant difference between the real-world applications of the SERS sensor on direct glyphosate analysis in environmental samples compared to an analysis using ultra-high performance liquid chromatography.
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Affiliation(s)
- Preeyanut Butmee
- National Nanotechnology Center, National Science and Technology Development Agency, Pathum Thani 12120, Thailand
| | - Anchalee Samphao
- Department of Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani 34190, Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani 34190, Thailand.
| | - Gamolwan Tumcharern
- National Nanotechnology Center, National Science and Technology Development Agency, Pathum Thani 12120, Thailand.
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Banerjee D, Akkanaboina M, Ghosh S, Soma VR. Picosecond Bessel Beam Fabricated Pure, Gold-Coated Silver Nanostructures for Trace-Level Sensing of Multiple Explosives and Hazardous Molecules. Materials (Basel) 2022; 15:4155. [PMID: 35744214 DOI: 10.3390/ma15124155] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/28/2022] [Accepted: 06/08/2022] [Indexed: 12/15/2022]
Abstract
A zeroth-order, non-diffracting Bessel beam, generated by picosecond laser pulses (1064 nm, 10 Hz, 30 ps) through an axicon, was utilized to perform pulse energy-dependent (12 mJ, 16 mJ, 20 mJ, 24 mJ) laser ablation of silver (Ag) substrates in air. The fabrication resulted in finger-like Ag nanostructures (NSs) in the sub-200 nm domain and obtained structures were characterized using the FESEM and AFM techniques. Subsequently, we employed those Ag NSs in surface-enhanced Raman spectroscopy (SERS) studies achieving promising sensing results towards trace-level detection of six different hazardous materials (explosive molecules of picric acid (PA) and ammonium nitrate (AN), a pesticide thiram (TH) and the dye molecules of Methylene Blue (MB), Malachite Green (MG), and Nile Blue (NB)) along with a biomolecule (hen egg white lysozyme (HEWL)). The remarkably superior plasmonic behaviour exhibited by the AgNS corresponding to 16 mJ pulse ablation energy was further explored. To accomplish a real-time application-oriented understanding, time-dependent studies were performed utilizing the AgNS prepared with 16 mJ and TH molecule by collecting the SERS data periodically for up to 120 days. The coated AgNSs were prepared with optimized gold (Au) deposition, accomplishing a much lower trace detection in the case of thiram (~50 pM compared to ~50 nM achieved prior to the coating) as well as superior EF up to ~108 (~106 before Au coating). Additionally, these substrates have demonstrated superior stability compared to those obtained before Au coating.
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Chang YC, Huang BH, Lin TH. Surface-Enhanced Raman Scattering and Fluorescence on Gold Nanogratings. Nanomaterials (Basel) 2020; 10:E776. [PMID: 32316451 DOI: 10.3390/nano10040776] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/13/2020] [Accepted: 04/15/2020] [Indexed: 11/17/2022]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy is a sensitive sensing technique. It is desirable to have an easy method to produce SERS-active substrate with reproducible and robust signals. We propose a simple method to fabricate SERS-active substrates with high structural homogeneity and signal reproducibility using electron beam (E-beam) lithography without the problematic photoresist (PR) lift-off process. The substrate was fabricated by using E-beam to define nanograting patterns on the photoresist and subsequently coat a layer of gold thin film on top of it. Efficient and stable SERS signals were observed on the substrates. In order to investigate the enhancement mechanism, we compared the signals from this substrate with those with photoresist lifted-off, which are essentially discontinuous gold stripes. While both structures showed significant grating-period-dependent fluorescence enhancement, no SERS signal was observed on the photoresist lifted-off gratings. Only transverse magnetic (TM)-polarized excitation exhibited strong enhancement, which revealed its plasmonic attribution. The fluorescence enhancement showed distinct periodic dependence for the two structures, which is due to the different enhancement mechanism. We demonstrate using this substrate for specific protein binding detection. Similar periodicity dependence was observed. Detailed theoretical and experimental studies were performed to investigate the observed phenomena. We conclude that the excitation of surface plasmon polaritons on the continuous gold thin film is essential for the stable and efficient SERS effects.
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Kumar A, Sharma R, Sharma AK, Agarwal A. A cost-effective identification of tobacco alkaloids using porous Si SERS substrates for forensic and bioanalytical applications. SN Appl Sci 2019. [DOI: 10.1007/s42452-019-1539-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Li K, Liu G, Zhang S, Dai Y, Ghafoor S, Huang W, Zu Z, Lu Y. A porous Au-Ag hybrid nanoparticle array with broadband absorption and high-density hotspots for stable SERS analysis. Nanoscale 2019; 11:9587-9592. [PMID: 31062804 DOI: 10.1039/c9nr01744e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Constructing high-density hotspots is of crucial importance in surface enhanced Raman scattering (SERS). In this paper, we present a large-area and broadband porous Au-Ag hybrid nanoparticle array which was fabricated by an ultra-thin alumina mask (UTAM) technique incorporated with annealing and galvanic replacement techniques. Experimental results and numerical simulations demonstrated that the porous Au-Ag hybrid nanoparticle array possessed enormous hotspots for high sensitivity, uniformity, and stability in SERS analysis. A large Raman enhancement factor of 2.2 × 107 was achieved with a relative standard deviation (RSD) of 7.7%, leading to excellent reliability for Raman detection. Furthermore, this novel substrate exhibited a long shelf time in an ambient environment and promising practical applications in many SERS-based quantitative analytical and biomedical sensing techniques.
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Affiliation(s)
- Kuanguo Li
- College of Physics and Electronics Information & Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Anhui Normal University, Wuhu, Anhui 241000, China.
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Coll A, Bermejo S, Hernández D, Castañer L. Al 2O 3/TiO 2 inverse opals from electrosprayed self-assembled templates. Beilstein J Nanotechnol 2018; 9:216-223. [PMID: 29441266 PMCID: PMC5789432 DOI: 10.3762/bjnano.9.23] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 12/21/2017] [Indexed: 06/08/2023]
Abstract
The fabrication of high optical quality inverse opals is challenging, requiring large size, three-dimensional ordered layers of high dielectric constant ratio. In this article, alumina/TiO2-air inverse opals with a 98.2% reflectivity peak at 798 nm having an area of 2 cm2 and a thickness of 17 µm are achieved using a sacrificial self-assembled structure of large thickness, which was produced with minimum fabrication errors by means of an electrospray technique. Using alumina as the first supporting layer enables the deposition of TiO2 at a higher temperature, therefore providing better optical quality.
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Affiliation(s)
- Arnau Coll
- Research Group in Micro and Nano Technologies, Electronic Engineering Department, Universitat Politècnica de Catalunya, Jordi Girona 1-3, 08034 Barcelona, Spain
| | - Sandra Bermejo
- Research Group in Micro and Nano Technologies, Electronic Engineering Department, Universitat Politècnica de Catalunya, Jordi Girona 1-3, 08034 Barcelona, Spain
| | - David Hernández
- Research Group in Micro and Nano Technologies, Electronic Engineering Department, Universitat Politècnica de Catalunya, Jordi Girona 1-3, 08034 Barcelona, Spain
| | - Luís Castañer
- Research Group in Micro and Nano Technologies, Electronic Engineering Department, Universitat Politècnica de Catalunya, Jordi Girona 1-3, 08034 Barcelona, Spain
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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 Appl Mater 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] [What about the content of this article? (0)] [Affiliation(s)] [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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10
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Xu K, Wang Z, Tan CF, Kang N, Chen L, Ren L, Thian ES, Ho GW, Ji R, Hong M. Uniaxially Stretched Flexible Surface Plasmon Resonance Film for Versatile Surface Enhanced Raman Scattering Diagnostics. ACS Appl Mater Interfaces 2017; 9:26341-26349. [PMID: 28704040 DOI: 10.1021/acsami.7b06669] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy affords a rapid, highly sensitive, and nondestructive approach for label-free and fingerprint diagnosis of a wide range of chemicals. It is of great significance to develop large-area, uniform, and environmentally friendly SERS substrates for in situ identification of analytes on complex topological surfaces. In this work, we demonstrate a biodegradable flexible SERS film via irreversibly and longitudinally stretching metal deposited biocompatible poly(ε-caprolactone) film. This composite film after stretching shows surprising phenomena: three-dimensional and periodic wave-shaped microribbons array embedded with a high density of nanogaps functioning as hot-spots at an average gap size of 20 nm and nanogrooves array along the stretching direction. The stretched polymer surface plasmon resonance film gives rise to more than 10 times signal enhancement in comparison with that of the unstretched composite film. Furthermore, the SERS signals with high uniformity exhibit good temperature stability. The polymer SPR film with excellent flexibility and transparency can be conformally attached onto arbitrary nonplanar surfaces for in situ detection of various chemicals. Our results pave a new way for next-generation flexible SERS detection means, as well as enabling its huge potentials toward green wearable devices for point-of-care diagnostics.
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Affiliation(s)
- Kaichen Xu
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, 117576, Singapore
- Data Storage Institute, (A*STAR) Agency for Science Technology and Research , 2 Fusionopolis Way, 138634, Singapore
| | - Zuyong Wang
- College of Materials Science and Engineering, Hunan University , Changsha, 410082, China
| | - Chuan Fu Tan
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, 117576, Singapore
| | - Ning Kang
- Department of Biomaterials, College of Materials, Xiamen University , Xiamen, 361005, China
| | - Lianwei Chen
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, 117576, Singapore
| | - Lei Ren
- Department of Biomaterials, College of Materials, Xiamen University , Xiamen, 361005, China
| | - Eng San Thian
- Department of Mechanical Engineering, National University of Singapore , 9 Engineering Drive 1, Singapore 117576, Singapore
| | - Ghim Wei Ho
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, 117576, Singapore
| | - Rong Ji
- Data Storage Institute, (A*STAR) Agency for Science Technology and Research , 2 Fusionopolis Way, 138634, Singapore
| | - Minghui Hong
- Department of Electrical and Computer Engineering, National University of Singapore , 4 Engineering Drive 3, 117576, Singapore
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Jiang S, Guo J, Zhang C, Li C, Wang M, Li Z, Gao S, Chen P, Si H, Xu S. A sensitive, uniform, reproducible and stable SERS substrate has been presented based on MoS2@Ag nanoparticles@pyramidal silicon. RSC Adv 2017. [DOI: 10.1039/c6ra26879j] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
By combine the Ag nanoparticles, pyramidal silicon and molybdenum disulfide, the MoS2@AgNPs@PSi substrate shows high performance in terms of sensitivity, uniformity, reproducibility and stability.
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Affiliation(s)
- Shouzhen Jiang
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Jia Guo
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Chao Zhang
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Chonghui Li
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Minghong Wang
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Zhen Li
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Saisai Gao
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Peixi Chen
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Haipeng Si
- Department of Orthopaedics
- Qilu Hospital
- Shandong University
- Jinan 250012
- China
| | - Shicai Xu
- Shandong Provincial Key Laboratory of Biophysics
- College of Physics and Electronic Information
- Dezhou University
- Dezhou 253023
- PR China
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12
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Areizaga-Martinez HI, Kravchenko I, Lavrik NV, Sepaniak MJ, Hernández-Rivera SP, De Jesús MA. Performance Characteristics of Bio-Inspired Metal Nanostructures as Surface-Enhanced Raman Scattered (SERS) Substrates. Appl Spectrosc 2016; 70:1432-1445. [PMID: 27566257 DOI: 10.1177/0003702816662596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 12/28/2015] [Indexed: 06/06/2023]
Abstract
The fabrication of high-performance plasmonic nanomaterials for bio-sensing and trace chemical detection is a field of intense theoretical and experimental research. The use of metal-silicon nanopillar arrays as analytical sensors has been reported with reasonable results in recent years. The use of bio-inspired nanocomposite structures that follow the Fibonacci numerical architecture offers the opportunity to develop nanostructures with theoretically higher and more reproducible plasmonic fields over extended areas. The work presented here describes the nanofabrication process for a series of 40 µm × 40 µm bio-inspired arrays classified as asymmetric fractals (sunflower seeds and romanesco broccoli), bilaterally symmetric (acacia leaves and honeycombs), and radially symmetric (such as orchids and lily flowers) using electron beam lithography. In addition, analytical capabilities were evaluated using surface-enhanced Raman scattering (SERS). The substrate characterization and SERS performance of the developed substrates as the strategies to assess the design performance are presented and discussed.
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Affiliation(s)
| | - Ivan Kravchenko
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, USA
| | - Nickolay V Lavrik
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, USA
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Zhang C, Jiang SZ, Yang C, Li CH, Huo YY, Liu XY, Liu AH, Wei Q, Gao SS, Gao XG, Man BY. Gold@silver bimetal nanoparticles/pyramidal silicon 3D substrate with high reproducibility for high-performance SERS. Sci Rep 2016; 6:25243. [PMID: 27143507 PMCID: PMC4855179 DOI: 10.1038/srep25243] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 04/13/2016] [Indexed: 11/09/2022] Open
Abstract
A novel and efficient surface enhanced Raman scattering (SERS) substrate has been presented based on Gold@silver/pyramidal silicon 3D substrate (Au@Ag/3D-Si). By combining the SERS activity of Ag, the chemical stability of Au and the large field enhancement of 3D-Si, the Au@Ag/3D-Si substrate possesses perfect sensitivity, homogeneity, reproducibility and chemical stability. Using R6G as probe molecule, the SERS results imply that the Au@Ag/3D-Si substrate is superior to the 3D-Si, Ag/3D-Si and Au/3D-Si substrate. We also confirmed these excellent behaviors in theory via a commercial COMSOL software. The corresponding experimental and theoretical results indicate that our proposed Au@Ag/3D-Si substrate is expected to develop new opportunities for label-free SERS detections in biological sensors, biomedical diagnostics and food safety.
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Affiliation(s)
- Chao Zhang
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Shou Zhen Jiang
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.,State Key Lab of Crystal Materials Shandong University, Jinan 250100, China
| | - Cheng Yang
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Chong Hui Li
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Yan Yan Huo
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Xiao Yun Liu
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Ai Hua Liu
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Qin Wei
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Sai Sai Gao
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Xing Guo Gao
- School of Science, Qilu University of Technology, Jinan 250353, China
| | - Bao Yuan Man
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
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14
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Ooms MD, Jeyaram Y, Sinton D. Disposable Plasmonics: Rapid and Inexpensive Large Area Patterning of Plasmonic Structures with CO₂ Laser Annealing. Langmuir 2015; 31:5252-5258. [PMID: 25884102 DOI: 10.1021/acs.langmuir.5b01092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present a method of direct patterning of plasmonic nanofeatures on glass that is fast, scalable, tunable, and accessible to a wide range of users-a unique combination in the context of current nanofabrication options for plasmonic devices. These benefits are made possible by the localized heating and subsequent annealing of thin metal films using infrared light from a commercial CO2 laser system. This approach results in patterning times of 30 mm(2)/min with an average cost of $0.10/mm(2). Colloidal Au nanoparticles with diameters between 15 and 40 nm can be formed on glass surfaces with x-y patterning resolutions of ∼180 μm. While the higher resolution provided by lithography is essential in many applications, in cases where the spatial patterning resolution threshold is lower, commercial CO2 laser processing can be 30-fold faster and 400-fold less expensive.
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Affiliation(s)
- Matthew D Ooms
- Department of Mechanical and Industrial Engineering and Institute for Sustainable Energy, University of Toronto, Toronto M5S 3G8, Canada
| | - Yogesh Jeyaram
- Department of Mechanical and Industrial Engineering and Institute for Sustainable Energy, University of Toronto, Toronto M5S 3G8, Canada
| | - David Sinton
- Department of Mechanical and Industrial Engineering and Institute for Sustainable Energy, University of Toronto, Toronto M5S 3G8, Canada
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