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Diwan A, Yadav P, Shekhawat AS, C A, M D, Sharma R, Shrivastav AM, Kumar R, Srivastava T, Saxena SK. Unraveling Exciton-Plasmon Coupling and the PIRET Mechanism in Decorated Silicon Nanowires. J Phys Chem Lett 2024:5171-5176. [PMID: 38713476 DOI: 10.1021/acs.jpclett.4c01010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Exciton-plasmon coupling is a fascinating physical phenomenon that has been investigated in various metal semiconductor systems. Intentionally chosen silicon nanowires (SiNWs) systems act as a host material for providing exciton as well as silicon oxide as a thin dielectric. A clear blue-shift in photoluminescence (PL) peak and a significant increase in visible range absorption were observed for metal nanoparticle (MNP) decorated SiNWs (D-SiNWs) which signifies the presence of exciton-plasmon coupling. A further investigation reveals that the possibility of the occurrence of the plasmon-induced resonance energy transfer (PIRET) mechanism is higher. The PL intensity enhancement in Au-decorated SiNWs is higher (∼38 times) in comparison to that in Pt due to the presence of a strong and localized electric field of plasmons near the interface of metal and semiconductors. Moreover, splitting in PL for gold-decorated SiNWs might be due to the presence of dipole-quadrupole coupling along with dipole-dipole coupling, which further increases the strength of the PIRET mechanism.
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Affiliation(s)
- Aarti Diwan
- Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India 603203
| | - Pooja Yadav
- National Institute of Standard and Technology, Gaithersburg, Maryland 20899, United States
| | - Abhishek S Shekhawat
- Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India 603203
| | - Akila C
- Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India 603203
| | - Dhatchayani M
- Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India 603203
| | - Rituraj Sharma
- Centre for Scientific and Applied Research (CSAR), IPS Academy, AB Road, Rajendra Nagar, Indore, India 452012
| | - Anand M Shrivastav
- Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India 603203
| | - Rajesh Kumar
- Materials and Device Laboratory, Department of Physics, Indian Institute of Technology Indore, Simrol, India 453552
| | - Tulika Srivastava
- Department of Electronics & Communication, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai, India 603203
| | - Shailendra K Saxena
- Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India 603203
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2
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Huang SY, Gao WN, Chou CM, Hsiao VKS. Porous silicon decorated with Au/TiO 2 nanocomposites for efficient photoinduced enhanced Raman spectroscopy. RSC Adv 2023; 13:15634-15639. [PMID: 37228681 PMCID: PMC10204733 DOI: 10.1039/d3ra02598e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/19/2023] [Indexed: 05/27/2023] Open
Abstract
In this study, we investigated the potential of porous silicon (PSi) modified with Au/TiO2 nanocomposites (NCPs) as a substrate for photoinduced enhanced Raman spectroscopy (PIERS). One-step pulsed laser-induced photolysis (PLIP) was used to embed Au/TiO2 NCPs in the surface of PSi. Scanning electron microscopy revealed that adding TiO2 nanoparticles (NPs) during PLIP led to the formation of predominantly spherical Au NPs with a diameter of approximately 20 nm. Furthermore, modifying the PSi substrate with Au/TiO2 NCPs considerably enhanced the Raman signal of rhodamine 6G (R6G) after 4 h of ultraviolet (UV) irradiation. Real-time monitoring of the Raman signals of R6G at different concentrations under UV irradiation revealed that the amplitude of the signals increased with the irradiation time for R6G concentrations ranging from 10-3 M to 10-5 M. PSi substrates decorated with Au/TiO2 NCPs may be used to develop materials for PIERS applications.
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Affiliation(s)
- Sheng-Yang Huang
- Division of Pediatric Surgery, Department of Surgery, Taichung Veterans General Hospital Taichung 407219 Taiwan
| | - Wei-Ning Gao
- Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University Nantou 54561 Taiwan
| | - Chia-Man Chou
- Division of Pediatric Surgery, Department of Surgery, Taichung Veterans General Hospital Taichung 407219 Taiwan
- School of Medicine, College of Medicine, National Yang Ming Chiao Tung University Taipei 112304 Taiwan
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University Taichung 402202 Taiwan
| | - Vincent K S Hsiao
- Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University Nantou 54561 Taiwan
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3
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Mousavi SM, Hashemi SA, Rahmanian V, Kalashgrani MY, Gholami A, Omidifar N, Chiang WH. Highly Sensitive Flexible SERS-Based Sensing Platform for Detection of COVID-19. BIOSENSORS 2022; 12:bios12070466. [PMID: 35884269 PMCID: PMC9312648 DOI: 10.3390/bios12070466] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/20/2022] [Accepted: 06/21/2022] [Indexed: 05/26/2023]
Abstract
COVID-19 continues to spread and has been declared a global emergency. Individuals with current or past infection should be identified as soon as possible to prevent the spread of disease. Surface-enhanced Raman spectroscopy (SERS) is an analytical technique that has the potential to be used to detect viruses at the site of therapy. In this context, SERS is an exciting technique because it provides a fingerprint for any material. It has been used with many COVID-19 virus subtypes, including Deltacron and Omicron, a novel coronavirus. Moreover, flexible SERS substrates, due to their unique advantages of sensitivity and flexibility, have recently attracted growing research interest in real-world applications such as medicine. Reviewing the latest flexible SERS-substrate developments is crucial for the further development of quality detection platforms. This article discusses the ultra-responsive detection methods used by flexible SERS substrate. Multiplex assays that combine ultra-responsive detection methods with their unique biomarkers and/or biomarkers for secondary diseases triggered by the development of infection are critical, according to this study. In addition, we discuss how flexible SERS-substrate-based ultrasensitive detection methods could transform disease diagnosis, control, and surveillance in the future. This study is believed to help researchers design and manufacture flexible SERS substrates with higher performance and lower cost, and ultimately better understand practical applications.
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Affiliation(s)
- Seyyed Mojtaba Mousavi
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei City 106335, Taiwan;
| | - Seyyed Alireza Hashemi
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada;
| | - Vahid Rahmanian
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland;
| | | | - Ahmad Gholami
- Biotechnology Research Center, Shiraz University of Medical Science, Shiraz 71468-64685, Iran;
| | - Navid Omidifar
- Department of Pathology, School of Medicine, Shiraz University of Medical Sciences, Shiraz 71468-64685, Iran;
| | - Wei-Hung Chiang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei City 106335, Taiwan;
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4
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Al-Syadi AM, Faisal M, Harraz FA, Jalalah M, Alsaiari M. Immersion-plated palladium nanoparticles onto meso-porous silicon layer as novel SERS substrate for sensitive detection of imidacloprid pesticide. Sci Rep 2021; 11:9174. [PMID: 33911124 PMCID: PMC8080827 DOI: 10.1038/s41598-021-88326-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 04/01/2021] [Indexed: 11/09/2022] Open
Abstract
Herein, we demonstrate the effectiveness of surface-enhanced Raman scattering (SERS) to detect trace concentration of potentially harmful imidacloprid pesticide. To achieve this ultimate objective, a rapid and highly effective methodology for the fabrication of active and stable porous silicon (PSi) plated palladium nanoparticles (PdNPs) SERS substrates by an electrochemical anodization and immersion plating routes was applied. The PSi layers were fabricated by the electrochemical anodization of a silicon wafer in ethanoic fluoride solution, followed by uniformly deposition of PdNPs via a simple immersion plating technique. The structural features and morphology of fabricated frameworks of PSi-Pd NPs have been investigated by field emission scanning electron microscopy (FE-SEM) with energy dispersive X-ray (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR) spectra. The PSi substrate demonstrates a meso-porous morphology with good distribution, good pore density and average pore sizes around 20 nm. The SERS performance of Si-Pd NPs and PSi-Pd NPs substrates has been examined taking imidacloprid (an insecticide) as a target analyte. The SERS signal of imidacloprid using PSi-Pd NPs substrate exhibited immense enhancement compared to the Si-Pd NPs substrate. The active substrate revealed excellent detectable performance with a concentration as low as 10-9 M imidacloprid and an enhancement factor (EF) of 1.2 × 105. This large EF is fundamentally ascribed to the combined effect of the electromagnetic improvement and charge transfer mechanisms. Additionally, no aging effect was observed for the present substrates kept in air for two weeks. Striking enhancement in Raman spectral signals obtained with the current PSi-Pd NPs substrates can provide a simple and smooth platform towards the sensitive detection of various target analytes.
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Affiliation(s)
- A M Al-Syadi
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, P.O. Box: 1988, Najran, 11001, Saudi Arabia.,Department of Physics, Faculty of Science and Arts, Najran University, Najran, Saudi Arabia.,Physics Department, Faculty of Education, Ibb University, Ibb, Yemen
| | - M Faisal
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, P.O. Box: 1988, Najran, 11001, Saudi Arabia.,Department of Chemistry, Faculty of Science and Arts, Najran University, Najran, Saudi Arabia
| | - Farid A Harraz
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, P.O. Box: 1988, Najran, 11001, Saudi Arabia. .,Nanomaterials and Nanotechnology Department, Central Metallurgical Research and Development Institute (CMRDI), P.O. 87, Helwan, Cairo, 11421, Egypt.
| | - Mohammed Jalalah
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, P.O. Box: 1988, Najran, 11001, Saudi Arabia.,Department of Electrical Engineering, Faculty of Engineering, Najran University, Najran, Saudi Arabia
| | - Mabkhoot Alsaiari
- Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, P.O. Box: 1988, Najran, 11001, Saudi Arabia.,Department of Chemistry, Faculty of Science and Arts At Sharurah, Najran University, Najran, Saudi Arabia
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5
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Wang X, Zhu X, Shi H, Chen Y, Chen Z, Zeng Y, Tang Z, Duan H. Three-Dimensional-Stacked Gold Nanoparticles with Sub-5 nm Gaps on Vertically Aligned TiO 2 Nanosheets for Surface-Enhanced Raman Scattering Detection Down to 10 fM Scale. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35607-35614. [PMID: 30232887 DOI: 10.1021/acsami.8b11713] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Seeking for ultrasensitive and low-cost substrates is highly demandable for practical applications of surface-enhanced Raman scattering (SERS) technology. In this work, we report an ultrasensitive SERS-active substrate based on wet-chemistry-synthesized vertically aligned large-area TiO2 nanosheets (NSs) decorated by densely packed gold nanoparticles (Au NPs) with sub-5 nm gaps. Via a multistep successive deposition process, three-dimensional-stacked Au NPs sandwiched by a 3 nm SiO2 layer were assembled onto the TiO2 NS, enabling numerous hotspots due to the formation of both ultratiny plasmonic gaps and semiconductor/metal interfaces. Experimental results show that the fabricated substrate displays a detection limit down to 10 fM (10-14 M) without involving any condensation process by using the crystal violet as probe molecules. Control experiments and electromagnetic simulations indicate that the nanogaps defined by the 3 nm spacer are essential for the obtained excellent SERS performance. With its ultrasensitive detection capability, we demonstrate that the fabricated SERS substrate can be used for the trace analysis of melamine in milk.
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Affiliation(s)
| | - Xupeng Zhu
- School of Physics Science and Technology , Lingnan Normal University , Zhanjiang 524048 , People's Republic of China
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6
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Girel KV, Panarin AY, Bandarenka HV, Isic G, Bondarenko VP, Terekhov SN. Plasmonic silvered nanostructures on macroporous silicon decorated with graphene oxide for SERS-spectroscopy. NANOTECHNOLOGY 2018; 29:395708. [PMID: 29988021 DOI: 10.1088/1361-6528/aad250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A method for fabricating surface-enhanced Raman scattering (SERS)-active substrates by immersion deposition of silver on a macroporous silicon (macro-PS) template with pore diameters and depth ranging from 500-1000 nm is developed. The procedure for the formation of nanostructured silver films in the layers of macro-PS was optimized. Silver particles of dimensions in the nano- and submicron-scale were formed on the external surface of the macro-PS immersed in the water-ethanol solution of AgNO3, while the inner pore walls were covered by smaller, 10-30 nm diameter, silver nanoparticles. Upon introducing the hydrofluoric acid to the reaction mixture, the size of nanoparticles grown on the pore walls increased up to 100-150 nm. Such nanostructures were found to yield SERS-signal intensities from CuTMpyP4 analyte molecules of the same order to those obtained from silvered mesoporous silicon reported previously. The tested storage stability for the silvered macro-PS-based samples reached up to 8 months. However, degradation of the SERS intensity under illumination by the laser beam during spectral measurements was observed. To improve the stability of the SERS-signal a hybrid structure involving graphene oxide deposited on the top of analyte molecules adsorbed on the Ag/macro-PS was formed. A systematic observation of the time evolution of the characteristic peak at 1365 cm-1 showed that the addition of the oxidized graphene layer over the analyte results in ∼2 times slower decay of the Raman intensity, indicating that the graphene coating can be used to enhance the stability of the SERS-signal from the CuTMpyP4 molecules.
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Affiliation(s)
- K V Girel
- Micro- and Nanoelectronics Department of BSUIR, Brovka St., 6, 220013, Minsk, Belarus
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7
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Bandarenka HV, Girel KV, Zavatski SA, Panarin A, Terekhov SN. Progress in the Development of SERS-Active Substrates Based on Metal-Coated Porous Silicon. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E852. [PMID: 29883382 PMCID: PMC5978229 DOI: 10.3390/ma11050852] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 05/07/2018] [Accepted: 05/14/2018] [Indexed: 12/29/2022]
Abstract
The present work gives an overview of the developments in surface-enhanced Raman scattering (SERS) with metal-coated porous silicon used as an active substrate. We focused this review on the research referenced to SERS-active materials based on porous silicon, beginning from the patent application in 2002 and enclosing the studies of this year. Porous silicon and metal deposition technologies are discussed. Since the earliest studies, a number of fundamentally different plasmonic nanostructures including metallic dendrites, quasi-ordered arrays of metallic nanoparticles (NPs), and metallic nanovoids have been grown on porous silicon, defined by the morphology of this host material. SERS-active substrates based on porous silicon have been found to combine a high and well-reproducible signal level, storage stability, cost-effective technology and handy use. They make it possible to identify and study many compounds including biomolecules with a detection limit varying from milli- to femtomolar concentrations. The progress reviewed here demonstrates the great prospects for the extensive use of the metal-coated porous silicon for bioanalysis by SERS-spectroscopy.
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Affiliation(s)
- Hanna V Bandarenka
- Applied Plasmonics Laboratory, Belarusian State University of Informatics and Radioelectronics, 220013 Minsk, Belarus.
| | - Kseniya V Girel
- Applied Plasmonics Laboratory, Belarusian State University of Informatics and Radioelectronics, 220013 Minsk, Belarus.
| | - Sergey A Zavatski
- Applied Plasmonics Laboratory, Belarusian State University of Informatics and Radioelectronics, 220013 Minsk, Belarus.
| | - Andrei Panarin
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 220072 Minsk, Belarus.
| | - Sergei N Terekhov
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 220072 Minsk, Belarus.
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8
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Alwan AM, Naseef IA, Dheyab AB. Well Controlling of Plasmonic Features of Gold Nanoparticles on Macro Porous Silicon Substrate by HF Acid Concentration. PLASMONICS (NORWELL, MASS.) 2018; 13:2037-2045. [PMID: 30595676 PMCID: PMC6280839 DOI: 10.1007/s11468-018-0720-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 02/27/2018] [Indexed: 06/09/2023]
Abstract
In this work, we fabricated an efficient macroporous silicon/gold nanoparticles (macro psi/AuNPs) hybrid structure and how well controlling of plasmonic features on macro psi/AuNPs employs them for highly sensitive detection of the very low concentration of cyanine (Cy) dyes molecules. Macro-PSi was synthesized on n-type Si wafer with 3-10 Ω. cm resistivity and 100 orientation using Photo Electro Chemical Etching (PECE) process with630 nm illumination wavelength and 30 mW/cm2 illumination intensity. The macroPSi /AuNPs hybrid structure substrates were prepared by simple and quick dipping process of macroPSi in tetrachloroauric gold solution HAuCl4 with different concentrations of (10-2 M, 10-2 M diluted in 2.9 M of HF, 5 × 10-3 M, and 5 × 10-3 M diluted in 2.9 M of HF). Efficient surface-enhanced Raman scattering (SERS) signals was obtained from macroPSi/AuNPs substrates for Cy dye concentration of about 10-6 and 10-10 M. The detection method is dependent on a nanoparticles sizes process through controlling the concentration in a HAuCl4 solution. Higher SERS signal was found for sample with lower salt concentration of 5 × 10-3 M diluted in HF. The enhancement factors (EF) of Raman's signal increased four orders of magnitude by diluting the salt concentration. The values of EF in the range of 0.8 × 103-0.72 × 107 were obtained by controlling the salt concentration from 10-2 to 5 × 10-3 diluted in HF acid.
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Affiliation(s)
- Alwan M. Alwan
- School of Applied Science, University of Technology, Baghdad, Iraq
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9
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Dou Z, Cui C, Feng Y, Chen Y, Wang G. Highly dispersed Ag nanoparticles embedded in alumina nanobelts as excellent surface-enhanced Raman scattering substrates. RSC Adv 2016. [DOI: 10.1039/c5ra25302k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The Ag/Al2O3 composite nanobelts with nearly monodispersed Ag nanoparticles embedded in alumina nanobelts show excellent SERS performances for the R6G probe molecule.
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Affiliation(s)
- Zhifeng Dou
- State Key Lab of Marine Resource Utilization in South China Sea and Center of Analysis and Testing (CAT)
- College of Materials and Chemical Engineering
- Hainan University
- Haikou
- P. R. China
| | - Chao Cui
- State Key Lab of Marine Resource Utilization in South China Sea and Center of Analysis and Testing (CAT)
- College of Materials and Chemical Engineering
- Hainan University
- Haikou
- P. R. China
| | - Yuhong Feng
- State Key Lab of Marine Resource Utilization in South China Sea and Center of Analysis and Testing (CAT)
- College of Materials and Chemical Engineering
- Hainan University
- Haikou
- P. R. China
| | - Yong Chen
- State Key Lab of Marine Resource Utilization in South China Sea and Center of Analysis and Testing (CAT)
- College of Materials and Chemical Engineering
- Hainan University
- Haikou
- P. R. China
| | - Guizhen Wang
- Key Laboratory of Tropical Biological Resources of Ministry of Education
- College of Materials and Chemical Engineering
- Hainan University
- Haikou
- P. R. China
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10
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Zhang Y, Wang B, Yang S, Li L, Guo L. Facile synthesis of spinous-like Au nanostructures for unique localized surface plasmon resonance and surface-enhanced Raman scattering. NEW J CHEM 2015. [DOI: 10.1039/c4nj01769b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Spinous-like gold nanostructures were prepared using a wet chemistry method, and the intensities of the UV-Vis and SERS signals of the nanostructures were determined to be greatly enhanced by the presence of the spinous shapes.
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Affiliation(s)
- Yan Zhang
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- PR China
| | - Bingyu Wang
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- PR China
| | - Shihe Yang
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- PR China
- Department of Chemistry
| | - Lidong Li
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- PR China
| | - Lin Guo
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- PR China
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11
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Bao ZY, Liu X, Chen Y, Wu Y, Chan HLW, Dai J, Lei DY. Quantitative SERS detection of low-concentration aromatic polychlorinated biphenyl-77 and 2,4,6-trinitrotoluene. JOURNAL OF HAZARDOUS MATERIALS 2014; 280:706-712. [PMID: 25232653 DOI: 10.1016/j.jhazmat.2014.08.058] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 08/09/2014] [Accepted: 08/27/2014] [Indexed: 06/03/2023]
Abstract
This paper reports a simple label-free high-sensitive method for detecting low-concentration persistent organic pollutants and explosive materials. The proposed method combines surface-enhanced Raman spectroscopy (SERS) and magnetomotive enrichment of the target molecules on the surface of Ag nanoparticles (NPs). This structure can be achieved through self-assembling integration of Ag NPs with ferromagnetic Fe3O4 microspheres, forming a hybrid SERS nanoprobe with both optical and magnetic properties. Moreover, the magnetic response of ferromagnetic Fe3O4 microspheres can be used to dynamically modulate the optical property of Ag NPs through controlling their geometric arrangement on the substrate by applying an external magnetic field. It is also demonstrated from the full-wave numerical simulation results that the maximum electromagnetic field enhancement can be greatly increased by shortening the distance of neighboring Ag NPs and therefore resulting in an improved SERS detecting limit. More importantly, by using the prepared substrate, the SERS signals from organic pollution substances, i.e. aromatic polychlorinated biphenyl-77 and 2,4,6-trinitrotoluene, were quantitatively analyzed.
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Affiliation(s)
- Zhi Yong Bao
- Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, China
| | - Xin Liu
- Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, China; Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province, College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, China
| | - Y Chen
- Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, China
| | - Yucheng Wu
- College of Material Science and Engineering, Hefei University of Technology, Hefei, China
| | - Helen L W Chan
- Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, China
| | - Jiyan Dai
- Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, China.
| | - Dang Yuan Lei
- Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, China; Shenzhen Research Institute, Hong Kong Polytechnic University, Shenzhen, China.
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12
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Chen S, Li X, Zhao Y, Chang L, Qi J. High performance surface-enhanced Raman scattering via dummy molecular imprinting onto silver microspheres. Chem Commun (Camb) 2014; 50:14331-3. [DOI: 10.1039/c4cc06535b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new strategy for achieving high performance SERS was proposed by using the dummy molecular imprinting technique.
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Affiliation(s)
- Shaona Chen
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001, P. R. China
| | - Xin Li
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001, P. R. China
- State Key Lab of Urban Water Resource and Environment
- Harbin Institute of Technology
| | - Yuanyuan Zhao
- Key Laboratory of Preparation and Applications of Environmental Friendly Materials
- Ministry of Education
- College of Chemistry
- Jilin Normal University
- Siping, P. R. China
| | - Limin Chang
- Key Laboratory of Preparation and Applications of Environmental Friendly Materials
- Ministry of Education
- College of Chemistry
- Jilin Normal University
- Siping, P. R. China
| | - Jingyao Qi
- School of Municipal and Environmental Engineering
- Harbin Institute of Technology
- Harbin 150090, P. R. China
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13
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Han Y, Tretiak S, Kilin D. Dynamics of charge transfer at Au/Si metal-semiconductor nano-interface. Mol Phys 2013. [DOI: 10.1080/00268976.2013.842007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Zhang LF, Zhong SL, Xu AW. Highly Branched Concave Au/Pd Bimetallic Nanocrystals with Superior Electrocatalytic Activity and Highly Efficient SERS Enhancement. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205279] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Zhang LF, Zhong SL, Xu AW. Highly branched concave Au/Pd bimetallic nanocrystals with superior electrocatalytic activity and highly efficient SERS enhancement. Angew Chem Int Ed Engl 2012. [PMID: 23192859 DOI: 10.1002/anie.201205279] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Superstar: branched concave Au/Pd bimetallic nanocrystals were synthesized in high yield by seed-mediated co-reduction of Au and Pd metal precursors in an aqueous solution at room temperature. The branches are concave and have high-index facets on their surfaces. These nanocrystals show superior electrocatalytic activity for the oxidation of ethanol and highly efficient SERS enhancement.
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Affiliation(s)
- Lin-Fei Zhang
- Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, China
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Demeritte T, Kanchanapally R, Fan Z, Singh AK, Senapati D, Dubey M, Zakar E, Ray PC. Highly efficient SERS substrate for direct detection of explosive TNT using popcorn-shaped gold nanoparticle-functionalized SWCNT hybrid. Analyst 2012; 137:5041-5. [DOI: 10.1039/c2an35984g] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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