1
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Zhang C, Wang M, Zhang J, Zou B, Wang Y. Self-template synthesis of mesoporous and biodegradable Fe 3O 4 nanospheres as multifunctional nanoplatform for cancer therapy. Colloids Surf B Biointerfaces 2023; 229:113467. [PMID: 37515962 DOI: 10.1016/j.colsurfb.2023.113467] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 07/10/2023] [Accepted: 07/16/2023] [Indexed: 07/31/2023]
Abstract
Superparamagnetic Fe3O4 nanospheres have demonstrated great potential as important components in nanomedicine for cancer imaging and therapy. One of the major obstacles that impedes their application is the slow degradation of ingested Fe3O4 nanospheres, which potentially causes long-term health risks. To tackle this issue, we proposed to fabricate Fe3O4 nanospheres with mesoporous structure via a simple self-template etching method. The mesoporous Fe3O4 nanospheres not only offered large specific surface area and weak-acidic responsive degradability, but also exhibited T2-weighted magnetic resonance contrast enhancement and magnetic targeting, which made them possible to serve as excellent cancer therapeutic nanoplatform. Both inorganic photothermal therapeutic Au nanoparticles and organic chemotherapeutic doxorubicin hydrochloride were demonstrated to be successfully loaded onto such kind of nanoplatform, and the hybrid nanomedicine demonstrated synergistic photothermal and chemotherapeutic activity for tumor elimination under near infrared irradiation and improved biodegradability in weak acidic tumor microenvironment. We believe that this study paved a simple way for designing multifunctional Fe3O4-based biodegradable nanomedicine.
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Affiliation(s)
- Chuanbin Zhang
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004, PR China
| | - Meijian Wang
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004, PR China
| | - Jianan Zhang
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004, PR China
| | - Bingfang Zou
- School of Physics and Electronics, Henan University, Kaifeng 475004, PR China.
| | - Yongqiang Wang
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004, PR China.
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2
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Wu K, Lai K, Chen J, Yao J, Zeng S, Jiang T, Si H, Gu C, Jiang J. Ag NC and Ag NP/PorC Film-Based Surface-Enhanced Raman Spectroscopy-Type Immunoassay for Ultrasensitive Prostate-Specific Antigen Detection. ACS OMEGA 2023; 8:18523-18529. [PMID: 37273592 PMCID: PMC10233843 DOI: 10.1021/acsomega.3c00230] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 04/24/2023] [Indexed: 06/06/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is a spectral detection technology with high sensitivity and detectivity and can be used to detect the fingerprint information of the molecules with ultralow concentration. Herein, a kind of immunostructure constructed by Ag nanoparticle/porous carbon (Ag NP/PorC) films as the immunosubstrate and Ag NCs as the immunoprobes was presented for ultralow level prostate-specific antigen (PSA) detection. Experimentally, the Ag NP/PorC film was first prepared with a facile method by carbonizing the gelatin-AgNO3 film in air, and Ag NCs were synthesized by the hydrothermal method. Then, the Ag NP/PorC film was modified by PSA antibodies as the substrate, while Ag NCs were decorated by R6G and PSA antibodies for probes. The sandwiched SERS detection embodiment was constructed by the immunoreaction between the PSA and PSA antibody predecorated on the substrate and probes. Our results show that the proposed SERS-type immunoassay is highly sensitive and selective to a wide range of PSA concentrations from 10-5 to 10-12 g/mL. Thereafter, it was also implemented to detect the PSA level in human serum, and the results successfully reproduce the PSA levels as those measured by the chemiluminescence method with a recovery rate above 90%. All in all, this SERS-type immunoassay provides a promising method for the early diagnosis of prostate cancer.
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Affiliation(s)
- Kerong Wu
- Department
of Urology, Ningbo First Hospital, Ningbo
University, Ningbo, Zhejiang 315010, China
- Key
Laboratory of Precision Medicine for Atherosclerotic Diseases of Zhejiang
Province, Ningbo, Zhejiang 315010, China
| | - Kui Lai
- Department
of Urology, Ningbo First Hospital, Ningbo
University, Ningbo, Zhejiang 315010, China
- The
Research Institute of Advanced Technology, Ningbo University, Ningbo, Zhejiang 315211, China
| | - Junfeng Chen
- Department
of Urology, Ningbo First Hospital, Ningbo
University, Ningbo, Zhejiang 315010, China
| | - Jie Yao
- Department
of Urology, Ningbo First Hospital, Ningbo
University, Ningbo, Zhejiang 315010, China
| | - Shuwen Zeng
- XLIM
Research Institute, CNRS/University of Limoges, Avenue Albert Thomas, 87060 Limoges, France
| | - Tao Jiang
- The
Research Institute of Advanced Technology, Ningbo University, Ningbo, Zhejiang 315211, China
| | - Hongjie Si
- Department
of Urology, Traditional Chinese Medical
Hospital of Zhuji, Zhuji, Zhejiang 311899, China
| | - Chenjie Gu
- Department
of Urology, Ningbo First Hospital, Ningbo
University, Ningbo, Zhejiang 315010, China
- The
Research Institute of Advanced Technology, Ningbo University, Ningbo, Zhejiang 315211, China
| | - Junhui Jiang
- Department
of Urology, Ningbo First Hospital, Ningbo
University, Ningbo, Zhejiang 315010, China
- Key
Laboratory of Precision Medicine for Atherosclerotic Diseases of Zhejiang
Province, Ningbo, Zhejiang 315010, China
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Wang T, Ye L, Xiao P, Zhu P, Gui X, Zhuang L. Dynamic modulation of a surface-enhanced Raman scattering signal by a varying magnetic field. OPTICS EXPRESS 2023; 31:12249-12260. [PMID: 37157388 DOI: 10.1364/oe.482479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Surface-enhanced Raman scattering (SERS) signals are fundamental for spectroscopy applications. However, existing substrates cannot perform a dynamically enhanced modulation of SERS signals. Herein, we developed a magnetically photonic chain-loading system (MPCLS) substrate by loading magnetically photonic nanochains of Fe3O4@SiO2 magnetic nanoparticles (MNPs) with Au nanoparticles (NPs). We achieved a dynamically enhanced modulation by applying an external stepwise magnetic field to the randomly dispersed magnetic photonic nanochains that gradually align in the analyte solution. The closely aligned nanochains create a higher number of hot spots by new neighboring Au NPs. Each chain represents a single SERS enhancement unit with both a surface plasmon resonance (SPR) effect and photonic property. The magnetic responsivity of MPCLS enables a rapid signal enhancement and tuning of the SERS enhancement factor.
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4
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Niu A, Xu H, Yuan Q, Wu F, Wei X. Lewis ionic liquid-loaded Fe 3O 4@SiO 2 magnetic catalytic microspheres coupled with persulfate for catalytic oxidative desulfurization. NEW J CHEM 2023. [DOI: 10.1039/d2nj05688g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Functional ionic liquid loading magnetic Fe3O4@SiO2 microspheres with persulfate were applied to desulfurization.
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Affiliation(s)
- Anqi Niu
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang 471023, P. R. China
| | - Hang Xu
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang 471023, P. R. China
| | - Qinlin Yuan
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang 471023, P. R. China
| | - Fengmin Wu
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang 471023, P. R. China
| | - Xuefeng Wei
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang 471023, P. R. China
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5
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Zou B, Lou S, Wang J, Zhou S, Wang Y. Periodic Surface-Enhanced Raman Scattering-Encoded Magnetic Beads for Reliable Quantitative Surface-Enhanced Raman Scattering-Based Multiplex Bioassay. Anal Chem 2022; 94:11557-11563. [PMID: 35960877 DOI: 10.1021/acs.analchem.2c01793] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Surface-enhanced Raman scattering (SERS)-based immunoassay on encoded beads is highly attractive with the advantages of ultrasensitivity, multiplex and high throughput. However, it was a great challenge to screen out in-focus signals of the immunoconjugated SERS nanoprobes on spherical bead conveniently. Here, periodic SERS-encoded magnetic beads (PSE-MBs) were developed through droplet optofluidic technique by using monodisperse SERS-encoded magnetic nanospheres as building blocks. The designed PSE-MBs not only exhibit huge coding capacity, but also provide the strongest and reproducible SERS coding signals as "in-focus beacons". When PSE-MBs are used as capture carriers in SERS-based immunoassay, both multiple target analytes and in-focus signals of SERS nanoprobes could be easily identified according to the collected SERS coding signals. Thus, reliable quantitative analysis of multiple target analytes could be conveniently achieved by such detection protocol. Additionally, the magnetic ingredient in PSE-MBs made the operation easily during the bioassay. The multiple advantages of PSE-MBs including large coding capacity, in-focus beacons and magnetic operation endorse them to be robust capture carriers in reliable quantitative SERS-based multiplex immunoassay.
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Affiliation(s)
- Bingfang Zou
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004, P. R. China.,School of Physics and Electronics, Henan University, Kaifeng 475004, P. R. China
| | - Shiyun Lou
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004, P. R. China
| | - Jizhou Wang
- Department of Clinical Laboratory, Translational Medicine Centre, Huaihe Hospital Affiliated to Henan University, Kaifeng 475004, P. R. China
| | - Shaomin Zhou
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004, P. R. China
| | - Yongqiang Wang
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004, P. R. China
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6
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Zhang J, Wang Y, Zhang X, Xie W, Li J, Wang Z. Study of the Fabrication of Gold Nanoparticle-Graphene-Arrayed Micro/Nanocavities as SERS Substrates Compared to Two Different Angles of Triangular Pyramid Tips. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4894-4905. [PMID: 35421315 DOI: 10.1021/acs.langmuir.2c00187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Surface-enhanced Raman scattering (SERS) has attracted attention because of its enormous potential to detect molecules with low concentrations. The method of fabricating SERS substrates is of great importance for improving the detection resolution. However, SERS substrates with different triangular pyramid tips fabricated by using the tip-based nanoindentation method has not been reported. Here, we prepared arrayed micro/nanocavities on copper-based graphene using the continuous indentation method with a Berkovich tip and a cube-corner tip, which have different face angles. Gold nanoparticles were then sputtered onto the graphene-copper micro/nanocavities to form the Au@GR@Cu micro/nanocavities SERS substrates. The substrates formed using the Berkovich tip and cube-corner tip were labeled B2-B9 and C2-C9, respectively, in which the numbers indicate the machining feed. Rhodamine 6G (R6G) was employed, and the Raman intensities of R6G on the differently arrayed Au@GR@Cu micro/nanocavities were measured. The Raman intensities of R6G were stronger on the pile-ups than on the inverted triangular pyramid cavities. The Raman intensities of R6G were highest on the C2 and B2 structures and lowest on the C9 and B9 structures. The Raman intensities of R6G on the arrayed Au@GR@Cu micro/nanocavities fabricated by the cube-corner tip were stronger than those on the arrayed Au@GR@Cu micro/nanocavities fabricated using the Berkovich tip with the same machining feed. In addition, the electric field intensity and distribution of the B9 and C9 arrayed Au@GR@Cu were simulated using Comsol software. Au@GR@Cu structures fabricated by the cube-corner tip were generated with higher electric field intensities. Furthermore, the relative standard deviations at 1362 cm-1 of R6G were 6.19 and 6.62% on the C2 and C4 surfaces, respectively, showing good homogeneity. The SERS spectra of 10-9 mol/L malachite green solution and 10-6 mol/L carbaryl solution were recognized on the C1, C2, and C4 surfaces on day 1 and after 3 months, respectively. After storage at room temperature for 3 months, the reductions in the Raman intensities were less than 10%, indicating excellent stability. The results showed that the arrayed Au@GR@Cu micro/nanocavities fabricated using the cube-corner tip performed better than those fabricated using the Berkovich tip and exhibited excellent uniformity, availability, and stability, providing great potential for detecting pesticides at low concentrations.
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Affiliation(s)
- Jingran Zhang
- Research Institute, Changchun University of Science and Technology, Chongqing, 401120, China
| | - Yu Wang
- Research Institute, Changchun University of Science and Technology, Chongqing, 401120, China
| | - Xinming Zhang
- School of Mechatronic Engineering and Automation, Foshan University, Foshan 528001,China
| | - Wenkun Xie
- Centre for Precision Manufacturing, DMEM, University of Strathclyde, Glasgow G1 1XJ, U.K
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7
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Wan M, Zhao H, Peng L, Zhao Y, Sun L. Facile One-Step Deposition of Ag Nanoparticles on SiO 2 Electrospun Nanofiber Surfaces for Label-Free SERS Detection and Antibacterial Dressing. ACS APPLIED BIO MATERIALS 2021; 4:6549-6557. [PMID: 35006892 DOI: 10.1021/acsabm.1c00674] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The fabrication of highly active and free-standing surface-enhanced Raman scattering (SERS) substrates in a simple and low-cost manner has been a crucial and urgent challenge in recent years. Herein, SiO2 nanofiber substrates modified with size-tunable Ag nanoparticles were prepared by the combination of electrospinning and in situ chemical reduction. The results demonstrate the presence and uniform adsorption of Ag nanoparticles on the SiO2 matrix surface. The free-standing composite nanofibrous substrates show high-performance SERS response toward 4-mercaptophenol and 4-mercaptobenzoic acid, and the detection limit can be as low as 10-10 mol/L. Most importantly, the as-prepared substrate as a versatile SERS platform can realize label-free detection of bio-macromolecules of bacteria, i.e., Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). Furthermore, the substrates also possess outstanding antibacterial activities against S. aureus and E. coli. Briefly, the significance of this study is that size-tunable Ag nanoparticles can be decorated on SiO2 nanofiber surfaces with triethanolamine as a bridging and reducing agent through a one-pot reaction, and the as-prepared nanofibrous membranes are expected to act as a candidate for label-free SERS detection as well as antibacterial dressing.
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Affiliation(s)
- Menghui Wan
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China
| | - Haodong Zhao
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China
| | - Lichao Peng
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China
| | - Yanbao Zhao
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China
| | - Lei Sun
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China
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8
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Xie S, Chen D, Gu C, Jiang T, Zeng S, Wang YY, Ni Z, Shen X, Zhou J. Molybdenum Oxide/Tungsten Oxide Nano-heterojunction with Improved Surface-Enhanced Raman Scattering Performance. ACS APPLIED MATERIALS & INTERFACES 2021; 13:33345-33353. [PMID: 34232012 DOI: 10.1021/acsami.1c03848] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
By virtue of their high uniformity and stability, metal oxide-based surface-enhanced Raman spectroscopy (SERS) substrates have attracted enormous attention for molecular trace detection. However, strategies for further enhancing the SERS sensitivity are still desired. Herein, MoOx/WOx nano-heterojunctions are constructed by mixing MoOx and WOx together (MoOx/WOx hybrid) with diverse weight ratios. Using a 532 nm laser as the excitation source and R6G as the Raman reporter, it is shown that the Raman signal intensity (for the peak @ 1360 cm-1) obtained on the optimal MoOx/WOx hybrid (MoOx/WOx = 1:1/3) is twice that observed on a pure MoOx or WOx substrate. Moreover, a limit of detection of 10-8 M and an enhancement factor of 108 are achieved. In the SERS enhancement mechanism investigation, it is revealed that MoOx and WOx form a staggered band structure. During the SERS measurement, electron-hole pairs are generated in the nano-heterojunction using the incident laser. They are then separated by the built-in potential with the electrons moving toward WOx. The accumulated electrons on WOx are further transferred to the R6G molecules through the coupling of orbitals. Consequently, the molecular polarizability is amplified, and SERS performance is enhanced. The abovementioned explanation is supported by the evidence that the contribution of the chemical enhancement mechanism in the optimal MoOx/WOx hybrid substrate is about 2.5 times or 5.9 times that in the pure WOx or MoOx substrate.
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Affiliation(s)
- Songyang Xie
- The Photonic Research Institute, Ningbo University, No. 818 Fenghua Road, Ningbo 315211, China
| | - Dong Chen
- The Photonic Research Institute, Ningbo University, No. 818 Fenghua Road, Ningbo 315211, China
| | - Chenjie Gu
- The Photonic Research Institute, Ningbo University, No. 818 Fenghua Road, Ningbo 315211, China
| | - Tao Jiang
- The Photonic Research Institute, Ningbo University, No. 818 Fenghua Road, Ningbo 315211, China
| | - Shuwen Zeng
- XLIM Research Institute, CNRS/University of Limoges, Avenue Albert Thomas, 87060 Limoges, France
| | - Ying Ying Wang
- Department of Optoelectronic Science, Harbin Institute of Technology at Weihai, Weihai 264209, China
| | - Zhenhua Ni
- School of Physics, Southeast University, No. 2 SEU Road, Nanjing 211189, China
| | - Xiang Shen
- The Photonic Research Institute, Ningbo University, No. 818 Fenghua Road, Ningbo 315211, China
| | - Jun Zhou
- The Photonic Research Institute, Ningbo University, No. 818 Fenghua Road, Ningbo 315211, China
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9
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Huynh KH, Hahm E, Noh MS, Lee JH, Pham XH, Lee SH, Kim J, Rho WY, Chang H, Kim DM, Baek A, Kim DE, Jeong DH, Park SM, Jun BH. Recent Advances in Surface-Enhanced Raman Scattering Magnetic Plasmonic Particles for Bioapplications. NANOMATERIALS 2021; 11:nano11051215. [PMID: 34064407 PMCID: PMC8147842 DOI: 10.3390/nano11051215] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/25/2021] [Accepted: 04/30/2021] [Indexed: 01/10/2023]
Abstract
The surface-enhanced Raman scattering (SERS) technique, that uses magnetic plasmonic particles (MPPs), is an advanced SERS detection platform owing to the synergetic effects of the particles’ magnetic and plasmonic properties. As well as being an ultrasensitive and reliable SERS material, MPPs perform various functions, such as aiding in separation, drug delivery, and acting as a therapeutic material. This literature discusses the structure and multifunctionality of MPPs, which has enabled the novel application of MPPs to various biological fields.
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Affiliation(s)
- Kim-Hung Huynh
- Department of Bioscience and Biotechnology, Konkuk University,120 Neungdong-ro, Gwangjin-Gu, Seoul 05029, Korea; (K.-H.H.); (E.H.); (X.-H.P.); (J.K.); (D.M.K.); (A.B.); (D.-E.K.)
| | - Eunil Hahm
- Department of Bioscience and Biotechnology, Konkuk University,120 Neungdong-ro, Gwangjin-Gu, Seoul 05029, Korea; (K.-H.H.); (E.H.); (X.-H.P.); (J.K.); (D.M.K.); (A.B.); (D.-E.K.)
| | - Mi Suk Noh
- Medical Device & Bio-research Team, Bio-medical & Environ-chemical Division, Korea Testing Certification, Gunpo, Gyeonggi-do 15809, Korea;
| | - Jong-Hwan Lee
- Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Korea;
| | - Xuan-Hung Pham
- Department of Bioscience and Biotechnology, Konkuk University,120 Neungdong-ro, Gwangjin-Gu, Seoul 05029, Korea; (K.-H.H.); (E.H.); (X.-H.P.); (J.K.); (D.M.K.); (A.B.); (D.-E.K.)
| | - Sang Hun Lee
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea;
| | - Jaehi Kim
- Department of Bioscience and Biotechnology, Konkuk University,120 Neungdong-ro, Gwangjin-Gu, Seoul 05029, Korea; (K.-H.H.); (E.H.); (X.-H.P.); (J.K.); (D.M.K.); (A.B.); (D.-E.K.)
| | - Won-Yeop Rho
- School of International Engineering and Science, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Korea;
| | - Hyejin Chang
- Division of Science Education, Kangwon National University, 1 Gangwondaehakgil, Chuncheon-si, Gangwon-do 24341, Korea;
| | - Dong Min Kim
- Department of Bioscience and Biotechnology, Konkuk University,120 Neungdong-ro, Gwangjin-Gu, Seoul 05029, Korea; (K.-H.H.); (E.H.); (X.-H.P.); (J.K.); (D.M.K.); (A.B.); (D.-E.K.)
| | - Ahruem Baek
- Department of Bioscience and Biotechnology, Konkuk University,120 Neungdong-ro, Gwangjin-Gu, Seoul 05029, Korea; (K.-H.H.); (E.H.); (X.-H.P.); (J.K.); (D.M.K.); (A.B.); (D.-E.K.)
| | - Dong-Eun Kim
- Department of Bioscience and Biotechnology, Konkuk University,120 Neungdong-ro, Gwangjin-Gu, Seoul 05029, Korea; (K.-H.H.); (E.H.); (X.-H.P.); (J.K.); (D.M.K.); (A.B.); (D.-E.K.)
| | - Dae Hong Jeong
- Department of Chemistry Education, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea;
- Center for Educational Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | - Seung-min Park
- Department of Urology, Department of Radiology, Molecular Imaging Program at Stanford, Stanford University School of Medicine, Stanford, CA 94305, USA
- Correspondence: (S.-m.P.); (B.-H.J.); Tel.: +82-2-450-0521 (B.-H.J.)
| | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology, Konkuk University,120 Neungdong-ro, Gwangjin-Gu, Seoul 05029, Korea; (K.-H.H.); (E.H.); (X.-H.P.); (J.K.); (D.M.K.); (A.B.); (D.-E.K.)
- Correspondence: (S.-m.P.); (B.-H.J.); Tel.: +82-2-450-0521 (B.-H.J.)
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10
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Gu C, Li D, Zeng S, Jiang T, Shen X, Zhang H. Synthesis and defect engineering of molybdenum oxides and their SERS applications. NANOSCALE 2021; 13:5620-5651. [PMID: 33688873 DOI: 10.1039/d0nr07779h] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy has been developed into a cross-disciplinary analytical technology through exploring various materials' Raman vibrational modes with ultra-high sensitivity and specificity. Although conventional noble-metal based SERS substrates have achieved great success, oxide-semiconductor-based SERS substrates are attracting researchers' intensive interest due to their merits of facile fabrication, high uniformity and tunable SERS characteristics. Among all the SERS active oxide semiconductors, molybdenum oxides (MoOx) possess exceptional advantages of high Raman enhancement factor, environmental stability, recyclable detection, etc. More interestingly, the SERS effect of the MoOx SERS substrates may involve both the electromagnetic enhancement mechanism and the chemical enhancement mechanism, which is determined by the stoichiometry and morphology of the material. Therefore, the focus of this review will be on two critical points: (1) synthesis and material engineering methods of the functional MoOx material and (2) MoOx SERS mechanism and performance evaluation. First, we review recent works on the MoOx preparation and material property tuning approaches. Second, the SERS mechanism and performance of various MoOx substrates are surveyed. In particular, the performance uniformity, enhancement factor and recyclability are evaluated. In the end, we discuss several challenges and open questions related to further promoting the MoOx as the SERS substrate for monitoring extremely low trace molecules and the theory for better understanding of the SERS enhancement mechanism.
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Affiliation(s)
- Chenjie Gu
- Institute of Photonics, Ningbo University, 818 Feng Hua Road 315211, Ningbo, China.
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11
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Choi M, Kang T, Choi SH, Byun KM. Dual modal plasmonic substrates based on a convective self-assembly technique for enhancement in SERS and LSPR detection. OPTICS EXPRESS 2021; 29:6179-6187. [PMID: 33726144 DOI: 10.1364/oe.419051] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 02/07/2021] [Indexed: 06/12/2023]
Abstract
In this study, surface-enhanced Raman scattering (SERS) scheme is combined with localized surface plasmon resonance (LSPR) detection on a thin gold film with stripe patterns of gold nanoparticles (GNPs) via convective self-assembly (CSA) method. The potential of dual modal plasmonic substrates was evaluated by binding 4-ABT and IgG analytes, respectively. SERS experiments presented not only a high sensitivity with a detection limit of 4.7 nM and an enhancement factor of 1.34 × 105, but an excellent reproducibility with relative standard deviation of 5.5%. It was found from plasmonic sensing experiments by immobilizing IgG onto GNP-mediated gold film that detection sensitivity was improved by more than 211%, compared with a conventional bare gold film. Our synergistic SERS-LSPR approach based on a simple and cost-effective CSA method could open a route for sensitive, reliable and reproducible dual modal detection to expand the application areas.
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12
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Wan M, Zhao H, Peng L, Zou X, Zhao Y, Sun L. Loading of Au/Ag Bimetallic Nanoparticles within and Outside of the Flexible SiO 2 Electrospun Nanofibers as Highly Sensitive, Stable, Repeatable Substrates for Versatile and Trace SERS Detection. Polymers (Basel) 2020; 12:E3008. [PMID: 33339343 PMCID: PMC7766957 DOI: 10.3390/polym12123008] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/10/2020] [Accepted: 12/14/2020] [Indexed: 12/20/2022] Open
Abstract
In this paper, we propose a facile and cost-effective electrospinning technique to fabricate surface-enhanced Raman scattering (SERS) substrates, which is appropriate for multiple analytes detection. First of all, HAuCl4∙3H2O was added into the TEOS/PVP precursor solution, and flexible SiO2 nanofibers incorporated with gold nanoparticles (SiO2@Au) were prepared by electrospinning and calcination. Subsequently, the nanofibrous membranes were immersed in the tannic acid and 3-aminopropyltriethoxysilane solution for surface modification through Michael addition reaction. Finally, the composite nanofibers (Ag@T-A@SiO2@Au) were obtained by the in-situ growth of Ag nanoparticles on the surfaces of nanofibers with tannic acid as a reducing agent. Due to the synergistic enhancement of Au and Ag nanoparticles, the flexible and self-supporting composite nanofibrous membranes have excellent SERS properties. Serving as SERS substrates, they are extremely sensitive to the detection of 4-mercaptophenol and 4-mercaptobenzoic acid, with an enhancement factor of 108. Moreover, they could be utilized to detect analytes such as pesticide thiram at a low concentration of 10-8 mol/L, and the substrates retain excellent Raman signals stability during the durability test of 60 days. Furthermore, the as-fabricated substrates, as a versatile SERS platform, could be used to detect bacteria of Staphylococcus aureus without a specific and complicated bacteria-aptamer conjugation procedure, and the detection limit is up to 103 colony forming units/mL. Meanwhile, the substrates also show an excellent repeatability of SERS response for S. aureus organelles. Briefly, the prime novelty of this work is the fabrication of Au/Ag bimetallic synergetic enhancement substrates as SERS platform for versatile detection with high sensitivity and stability.
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Affiliation(s)
| | | | - Lichao Peng
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China; (M.W.); (H.Z.); (X.Z.); (Y.Z.)
| | | | | | - Lei Sun
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China; (M.W.); (H.Z.); (X.Z.); (Y.Z.)
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13
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Li N, Zong S, Zhang Y, Wang Z, Wang Y, Zhu K, Yang K, Wang Z, Chen B, Cui Y. A SERS-colorimetric dual-mode aptasensor for the detection of cancer biomarker MUC1. Anal Bioanal Chem 2020; 412:5707-5718. [PMID: 32632516 DOI: 10.1007/s00216-020-02790-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 06/15/2020] [Accepted: 06/24/2020] [Indexed: 12/11/2022]
Abstract
Human mucin-1 (MUC1) has attracted considerable attention owing to its overexpression in diverse malignancies. Here, for the rapid and efficient detection of MUC1, we present a SERS-colorimetric dual-mode aptasensor, by integrating SERS probes with magnetic separation, which has several distinctive advantages. Using such a dual-mode aptasensor, the colorimetric functionality is distinguishable by the naked eye, providing a fast and straightforward screening ability for the detection of MUC1. Moreover, SERS-based detection greatly improves the detection sensitivity, reaching a limit of detection of 0.1 U/mL. In addition, the combination of SERS and colorimetric method holds the advantages of these two techniques and thereby increases the reliability and efficiency of MUC1 detection. On the one hand, the magnetic nanobeads functionalized with MUC1-specific aptamer were utilized as an efficient capturing substrate for separating MUC1 from biological complex medium. On the other hand, the gold-silver core-shell nanoparticles modified with Raman reporters and the complementary sequences of MUC1 were used as the signal indicator, which could simultaneously report the SERS signal and colorimetric change. This strategy can achieve a good detection range and realize MUC1 analysis in real patients' samples. Thus, we anticipate that this kind of aptasensor would provide promising potential applications in the diagnosis and prognosis of cancers. Graphical abstract.
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Affiliation(s)
- Na Li
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Shenfei Zong
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Yizhi Zhang
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Zhile Wang
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Yujie Wang
- Department of Hematology and Oncology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Kai Zhu
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Kuo Yang
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Zhuyuan Wang
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, Jiangsu, China.
| | - Baoan Chen
- Department of Hematology and Oncology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210096, Jiangsu, China
| | - Yiping Cui
- Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, Jiangsu, China
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14
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Song L, Huang Y, Nie Z, Chen T. Macroscopic two-dimensional monolayer films of gold nanoparticles: fabrication strategies, surface engineering and functional applications. NANOSCALE 2020; 12:7433-7460. [PMID: 32219290 DOI: 10.1039/c9nr09420b] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In the last few decades, two-dimensional monolayer films of gold nanoparticles (2D MFGS) have attracted increasing attention in various fields, due to their superior attributes of macroscopic size and accessible fabrication, controllable electromagnetic enhancement, distinctive optical harvesting and electron transport capabilities. This review will focus on the recent progress of 2D monolayer films of gold nanoparticles in construction approaches, surface engineering strategies and functional applications in the optical and electric fields. The research challenges and prospective directions of 2D MFGS are also discussed. This review would promote a better understanding of 2D MFGS and establish a necessary bridge among the multidisciplinary research fields.
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Affiliation(s)
- Liping Song
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.
| | - Youju Huang
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China. and College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China and National Engineering Research Centre for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, P. R. China
| | - Zhihong Nie
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China.
| | - Tao Chen
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.
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15
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Zou B, Niu C, Ma M, Zhao L, Wang Y. Magnetic Assembly Route to Construct Reproducible and Recyclable SERS Substrate. NANOSCALE RESEARCH LETTERS 2019; 14:369. [PMID: 31807938 PMCID: PMC6895331 DOI: 10.1186/s11671-019-3184-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 10/15/2019] [Indexed: 06/10/2023]
Abstract
The fabrication of a uniform array film through assembly of colloidal building blocks is of practical interest for the integrated individual and collective functions. Here, a magnetic assembly route was put forward to organize monodisperse noble metal microspheres into a uniform array film for surface-enhanced Raman scattering (SERS) application, which demonstrated the integrated signal sensitivity of single noble metal microspheres and reproducibility of their assembled uniform array film. For this purpose, monodisperse multifunctional Fe3O4@SiO2@TiO2@Ag (FOSTA) colloidal microspheres as building blocks were successfully synthesized through a homemade ultrasonic-assisted reaction system. When used in SERS test, these multifunctional microspheres could firstly bind the analyte (R6G) from solution and then assembled into a uniform film under an external magnetic field, which exhibited high SERS detection sensitivity with good reproducibility. In addition, due to the TiO2 interlayer in FOSTA colloidal microspheres, the building blocks could be recycled and self cleaned through photocatalytic degradation of the adsorbed analyte for recycling SERS application.
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Affiliation(s)
- Bingfang Zou
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng, People's Republic of China
- School of Physics and Electronics, Henan University, Kaifeng, People's Republic of China
| | - Chunyu Niu
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng, People's Republic of China
| | - Ming Ma
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng, People's Republic of China
| | - Lu Zhao
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng, People's Republic of China
| | - Yongqiang Wang
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng, People's Republic of China.
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16
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Guo H, Zhao A, He Q, Chen P, Wei Y, Chen X, Hu H, Wang M, Huang H, Wang R. Multifunctional Fe3O4@mTiO2@noble metal composite NPs as ultrasensitive SERS substrates for trace detection. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2019.01.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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17
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Scaramuzza S, Polizzi S, Amendola V. Magnetic tuning of SERS hot spots in polymer-coated magnetic-plasmonic iron-silver nanoparticles. NANOSCALE ADVANCES 2019; 1:2681-2689. [PMID: 36132716 PMCID: PMC9417711 DOI: 10.1039/c9na00143c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 05/21/2019] [Indexed: 05/19/2023]
Abstract
Plasmonic nanostructures are intensively studied for their ability to create electromagnetic hot spots, where a great variety of optical and spectroscopic processes can be amplified. Understanding how to control the formation of hot spots in a dynamic and reversible way is crucial to further expand the panorama of plasmon enhanced phenomena. In this work, we investigate the ability to modulate the hot spots in magnetic-plasmonic iron-doped silver nanoparticles dispersed in aqueous solution, by applying an external magnetic field. Evidence of magnetic field induction of hot spots was achieved by measuring the amplification of surface enhanced Raman scattering (SERS) from analytes dispersed in the solution containing Ag-Fe NPs. A polymeric shell was introduced around Ag-Fe NPs to confer colloidal stability, and it was found that the length and density of the polymer chains have a significant influence on SERS performance, and therefore on the formation of electromagnetic hot spots, under the action of the external magnetic field. These findings are expected to provide an important contribution to understanding the growing field of tuneable electromagnetic enhancement by external stimuli, such as magnetic fields applied to magnetic-plasmonic nanoparticles.
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Affiliation(s)
- Stefano Scaramuzza
- Department of Chemical Sciences, University of Padova Via Marzolo 1 I-35131 Padova Italy
| | - Stefano Polizzi
- Department of Molecular Sciences and Nanosystems, Centro di Microscopia Elettronica "G. Stevanato", Università Cà Foscari Venezia Via Torino 155/b, I-30172 Venezia-Mestre Italy
| | - Vincenzo Amendola
- Department of Chemical Sciences, University of Padova Via Marzolo 1 I-35131 Padova Italy
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18
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Wei H, McCarthy A, Song J, Zhou W, Vikesland PJ. Quantitative SERS by hot spot normalization - surface enhanced Rayleigh band intensity as an alternative evaluation parameter for SERS substrate performance. Faraday Discuss 2019; 205:491-504. [PMID: 28926064 DOI: 10.1039/c7fd00125h] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The performance of surface-enhanced Raman spectroscopy (SERS) substrates is typically evaluated by calculating an enhancement factor (EF). However, it is challenging to accurately calculate EF values since the calculation often requires the use of model analytes and requires assumptions about the number of analyte molecules within the laser excitation volume. Furthermore, the measured EF values are target analyte dependent and thus it is challenging to compare substrates with EF values obtained using different analytes. In this study, we propose an alternative evaluation parameter for SERS substrate performance that is based on the intensity of the surface plasmon enhanced Rayleigh band (IRayleigh) that originates from the amplified spontaneous emission (ASE) of the laser. Compared to the EF, IRayleigh reflects the enhancing capability of the substrate itself, is easy to measure without the use of any analytes, and is universally applicable for the comparison of SERS substrates. Six SERS substrates with different states (solid, suspended in liquid, and hydrogel), different plasmonic nanoparticle identities (silver and gold), as well as different nanoparticle sizes and shapes were used to support our hypothesis. The results show that there are excellent correlations between the measured SERS intensities and IRayleigh as well as between the SERS homogeneity and the variation of IRayleigh acquired with the six SERS substrates. These results suggest that IRayleigh can be used as an evaluation parameter for both SERS substrate efficiency and reproducibility.
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Affiliation(s)
- Haoran Wei
- Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia, USA.
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19
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Zhao H, Hasi W, Li N, Sha X, Lin S, Han S. In situ analysis of pesticide residues on the surface of agricultural products via surface-enhanced Raman spectroscopy using a flexible Au@Ag–PDMS substrate. NEW J CHEM 2019. [DOI: 10.1039/c9nj01901d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
In situ analysis of pesticide residues on the surface of agricultural products via surface-enhanced Raman spectroscopy using a flexible Au@Ag–PDMS substrate.
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Affiliation(s)
- Hang Zhao
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
| | - Wuliji Hasi
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
| | - Nan Li
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
| | - Xuanyu Sha
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
| | - Shuang Lin
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
| | - Siqingaowa Han
- National Key Laboratory of Science and Technology on Tunable Laser
- Harbin Institute of Technology
- Harbin
- China
- Affiliated Hospital of Inner Mongolia University for the Nationalities
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20
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Chen WJ, Liu XQ, Zhang S, Jiang H. Preparation of Gap-Controlled Monodispersed Ag Nanoparticles by Amino Groups Grafted on Silica Microspheres as a SERS Substrate for the Detection of Low Concentrations of Organic Compounds. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00717] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wen-Jing Chen
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Xiao-Qing Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Shun Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Hong Jiang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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21
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Fateixa S, Raposo M, Nogueira H, Trindade T. A general strategy to prepare SERS active filter membranes for extraction and detection of pesticides in water. Talanta 2018; 182:558-566. [DOI: 10.1016/j.talanta.2018.02.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 02/01/2018] [Accepted: 02/04/2018] [Indexed: 11/28/2022]
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22
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Wu C, Cai C, Yang P, Liu W. An atom-induced situ-growth method for constructing a highly sensitive and reproducible large area SERS substrate. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.02.064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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23
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Liu R, Li S, Liu JF. Self-assembly of plasmonic nanostructures into superlattices for surface-enhanced Raman scattering applications. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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24
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Wang Z, Zong S, Wu L, Zhu D, Cui Y. SERS-Activated Platforms for Immunoassay: Probes, Encoding Methods, and Applications. Chem Rev 2017; 117:7910-7963. [DOI: 10.1021/acs.chemrev.7b00027] [Citation(s) in RCA: 368] [Impact Index Per Article: 52.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhuyuan Wang
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, China
| | - Shenfei Zong
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, China
| | - Lei Wu
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, China
| | - Dan Zhu
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, China
| | - Yiping Cui
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, China
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25
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Sun H, Chen L, Wang Y, Hua Z, Liu Y, Zhang Y, Yang J. Increasing local field by interfacial coupling in nanobowl arrays. RSC Adv 2017. [DOI: 10.1039/c7ra09690a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
An increased local field is crucial to create hotspots when applied in detections, which usually means the fabrication of nanostructure arrays with strong electromagnetic couplings.
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Affiliation(s)
- Huanhuan Sun
- Key Laboratory of Functional Materials Physics and Chemistry
- Ministry of Education
- College of Physics
- Jilin Normal University
- Changchun 130103
| | - Lei Chen
- Key Laboratory of Functional Materials Physics and Chemistry
- Ministry of Education
- College of Physics
- Jilin Normal University
- Changchun 130103
| | - Yaxin Wang
- Key Laboratory of Functional Materials Physics and Chemistry
- Ministry of Education
- College of Physics
- Jilin Normal University
- Changchun 130103
| | - Zhong Hua
- Key Laboratory of Functional Materials Physics and Chemistry
- Ministry of Education
- College of Physics
- Jilin Normal University
- Changchun 130103
| | - Yang Liu
- Key Laboratory of Functional Materials Physics and Chemistry
- Ministry of Education
- College of Physics
- Jilin Normal University
- Changchun 130103
| | - Yongjun Zhang
- Key Laboratory of Functional Materials Physics and Chemistry
- Ministry of Education
- College of Physics
- Jilin Normal University
- Changchun 130103
| | - Jinghai Yang
- Key Laboratory of Functional Materials Physics and Chemistry
- Ministry of Education
- College of Physics
- Jilin Normal University
- Changchun 130103
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26
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Wang C, Li M, Li Q, Zhang K, Wang C, Xiao R, Wang S. Polyethyleneimine-mediated seed growth approach for synthesis of silver-shell silica-core nanocomposites and their application as a versatile SERS platform. RSC Adv 2017. [DOI: 10.1039/c6ra28629a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
PEI-mediated seed growth approach for synthesis of high performance silver-shell silica-core nanocomposites.
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Affiliation(s)
- Chongwen Wang
- College of Life Sciences & Bio-Engineering
- Beijing University of Technology
- Beijing 100124
- PR China
- Beijing Institute of Radiation Medicine
| | - Min Li
- Beijing Institute of Radiation Medicine
- Beijing 100850
- PR China
- Henan University of Chinese Medicine
- Zhengzhou
| | - Qingjun Li
- Beijing Institute of Radiation Medicine
- Beijing 100850
- PR China
- Henan University of Chinese Medicine
- Zhengzhou
| | - Kehan Zhang
- Beijing Institute of Radiation Medicine
- Beijing 100850
- PR China
| | - Chaoguang Wang
- Beijing Institute of Radiation Medicine
- Beijing 100850
- PR China
| | - Rui Xiao
- Beijing Institute of Radiation Medicine
- Beijing 100850
- PR China
| | - Shengqi Wang
- College of Life Sciences & Bio-Engineering
- Beijing University of Technology
- Beijing 100124
- PR China
- Beijing Institute of Radiation Medicine
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