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Fan L, Du B, Pei F, Hu W, Feng S, Liu B, Tong Z, Tan W, Mu X. A Novel SPR Immunosensor Based on Dual Signal Amplification Strategy for Detection of SARS-CoV-2 Nucleocapsid Protein. BIOSENSORS 2023; 13:bios13050549. [PMID: 37232910 DOI: 10.3390/bios13050549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/09/2023] [Accepted: 05/12/2023] [Indexed: 05/27/2023]
Abstract
Since the global outbreak of coronavirus disease 2019 (COVID-19), it has spread rapidly around the world. The nucleocapsid (N) protein is one of the most abundant SARS-CoV-2 proteins. Therefore, a sensitive and effective detection method for SARS-CoV-2 N protein is the focus of research. Here, we developed a surface plasmon resonance (SPR) biosensor based on the dual signal-amplification strategy of Au@Ag@Au nanoparticles (NPs) and graphene oxide (GO). Additionally, a sandwich immunoassay was utilized to sensitively and efficiently detect SARS-CoV-2 N protein. On the one hand, Au@Ag@Au NPs have a high refractive index and the capability to electromagnetically couple with the plasma waves propagating on the surface of gold film, which are harnessed for amplifying the SPR response signal. On the other hand, GO, which has the large specific surface area and the abundant oxygen-containing functional groups, could provide unique light absorption bands that can enhance plasmonic coupling to further amplify the SPR response signal. The proposed biosensor could efficiently detect SARS-CoV-2 N protein for 15 min and the detection limit for SARS-CoV-2 N protein was 0.083 ng/mL, with a linear range of 0.1 ng/mL~1000 ng/mL. This novel method can meet the analytical requirements of artificial saliva simulated samples, and the developed biosensor had a good anti-interference capability.
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Affiliation(s)
- Lirui Fan
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
- School of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
| | - Bin Du
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Fubin Pei
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Wei Hu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Shasha Feng
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Bing Liu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Zhaoyang Tong
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Wenyuan Tan
- School of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
| | - Xihui Mu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
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He LB, Shangguan L, Ran YT, Zhu C, Lu ZY, Zhu JH, Yu DJ, Kan CX, Sun LT. Revealing the alloying and dealloying behaviours in AuAg nanorods by thermal stimulus. NANOSCALE ADVANCES 2023; 5:685-692. [PMID: 36756526 PMCID: PMC9890656 DOI: 10.1039/d2na00746k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 12/07/2022] [Indexed: 06/18/2023]
Abstract
Binary metallic nanocrystals are attractive as they offer an extra degree of freedom for structure and phase modulation to generate synergistic effects and extraordinary properties. However, whether the binary structures and phases at the nanoscale still follow the rules established on the bulk counterparts remains unclear. In this work, AuAg nanorods were used as a sample to probe into this issue. An in situ heating method by combining aberration-corrected transmission electron microscopes with a chip-based heating holder was employed to perform the heating experiments. It was found that the AuAg nanorods, which initially possessed heterostructures, can be designed and engineered to be gradient phase alloys with thermal pulses over 350 °C. Atomic diffusion inside the rod structures did not alter the shape of the rods but provided a route to fine-tune their properties. At higher temperatures, the discrepant sublimation behaviours between Au and Ag lead to dealloying of the nanorods. Durative sublimation of the Ag element can continuously tailor the lengths of the nanorods while concentrating the Au composition simultaneously. Especially, nearly pure Au nanocrystals can be obtained with the depletion of Ag by sublimation. These findings give insights into the nanoscale structure and phase behaviours in binary alloys and provide an alternative way to fine-tune their structure, phase, and properties.
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Affiliation(s)
- Long-Bing He
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
- Centre for Advanced Materials and Manufacture, Joint Research Institute of Southeast University and Monash University Suzhou 215123 P. R. China
| | - Lei Shangguan
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Ya-Ting Ran
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Chao Zhu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Zi-Yu Lu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Jiong-Hao Zhu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Dao-Jiang Yu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Cai-Xia Kan
- College of Physics, Nanjing University of Aeronautics and Astronautics No. 29 Jiangjun Road Nanjing 211106 P. R. China
| | - Li-Tao Sun
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
- Centre for Advanced Materials and Manufacture, Joint Research Institute of Southeast University and Monash University Suzhou 215123 P. R. China
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Zheng J, Cheng X, Zhang H, Bai X, Ai R, Shao L, Wang J. Gold Nanorods: The Most Versatile Plasmonic Nanoparticles. Chem Rev 2021; 121:13342-13453. [PMID: 34569789 DOI: 10.1021/acs.chemrev.1c00422] [Citation(s) in RCA: 169] [Impact Index Per Article: 56.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Gold nanorods (NRs), pseudo-one-dimensional rod-shaped nanoparticles (NPs), have become one of the burgeoning materials in the recent years due to their anisotropic shape and adjustable plasmonic properties. With the continuous improvement in synthetic methods, a variety of materials have been attached around Au NRs to achieve unexpected or improved plasmonic properties and explore state-of-the-art technologies. In this review, we comprehensively summarize the latest progress on Au NRs, the most versatile anisotropic plasmonic NPs. We present a representative overview of the advances in the synthetic strategies and outline an extensive catalogue of Au-NR-based heterostructures with tailored architectures and special functionalities. The bottom-up assembly of Au NRs into preprogrammed metastructures is then discussed, as well as the design principles. We also provide a systematic elucidation of the different plasmonic properties associated with the Au-NR-based structures, followed by a discussion of the promising applications of Au NRs in various fields. We finally discuss the future research directions and challenges of Au NRs.
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Affiliation(s)
- Jiapeng Zheng
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Xizhe Cheng
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Han Zhang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Xiaopeng Bai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Ruoqi Ai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Lei Shao
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
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Wang X, Yao L, Chen X, Dai H, Wang M, Zhang L, Ni Y, Xiao L, Han JB. Gap-Induced Giant Third-Order Optical Nonlinearity and Long Electron Relaxation Time in Random-Distributed Gold Nanorod Arrays. ACS APPLIED MATERIALS & INTERFACES 2019; 11:32469-32474. [PMID: 31409071 DOI: 10.1021/acsami.9b08935] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The third-order optical nonlinearities and the hot electron relaxation time (τ) of random-distributed gold nanorods arrays on glass (R-GNRA) have been investigated by using Z-scan and optical Kerr effect (OKE) techniques. Large third-order optical susceptibility (χ(3)) with the value of 2.5 × 10-6 esu has been obtained around the plamsonic resonance peak under the excitation power intensity of 0.1 GW/cm2. Further decrease of the excitation power intensity down to 0.3 MW/cm2 will lead to the significant increase of χ(3) up to 6.4 × 10-4 esu. The OKE results show that the relaxation time of R-GNRA around the plasmonic peak is 13.9 ± 0.4 ps, which is more than 4 times longer than those of the individual gold nanostructures distributed in water solutions. The Finite-difference time domain simulations demonstrate that this large enhancement of χ(3) and slow down of τ are caused by the gap-induced large local field enhancement of GNRs dimers in R-GNRA. These significant results offer great opportunities for plasmonic nanostructures in applications of photonic and photocatalytic devices.
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Affiliation(s)
- Xia Wang
- School of Mathematics and Physics , Wenhua College , Wuhan 430074 , P. R. China
| | - Linhua Yao
- Wuhan National High Magnetic Field Center and School of Physics , Huazhong University of Science and Technology , Wuhan 430074 , P. R. China
| | - Xiaodie Chen
- Wuhan National High Magnetic Field Center and School of Physics , Huazhong University of Science and Technology , Wuhan 430074 , P. R. China
| | - Hongwei Dai
- Wuhan National High Magnetic Field Center and School of Physics , Huazhong University of Science and Technology , Wuhan 430074 , P. R. China
| | - Mingshan Wang
- Wuhan National High Magnetic Field Center and School of Physics , Huazhong University of Science and Technology , Wuhan 430074 , P. R. China
| | - Luman Zhang
- Wuhan National High Magnetic Field Center and School of Physics , Huazhong University of Science and Technology , Wuhan 430074 , P. R. China
| | - Yun Ni
- School of Mathematics and Physics , Wenhua College , Wuhan 430074 , P. R. China
| | - Lixia Xiao
- School of Mathematics and Physics , Wenhua College , Wuhan 430074 , P. R. China
| | - Jun-Bo Han
- Wuhan National High Magnetic Field Center and School of Physics , Huazhong University of Science and Technology , Wuhan 430074 , P. R. China
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Qiu YH, Chen K, Ding SJ, Nan F, Lin YJ, Ma JX, Hao ZH, Zhou L, Wang QQ. Highly tunable nonlinear response of Au@WS 2 hybrids with plasmon resonance and anti-Stokes effect. NANOSCALE 2019; 11:8538-8545. [PMID: 30990484 DOI: 10.1039/c8nr09946d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We synthesize Au@WS2 hybrid nanobelts and investigate their third-order nonlinear responses mediated by a strong anti-Stokes effect. By using the femtosecond Z-scan technique and tuning the excitation photon energy (Eexc), we find the sign reversals of both nonlinear absorption coefficient β and nonlinear refractive index γ to be around 1.60 eV, which is prominently higher than the bandgap (1.35 eV) of WS2 bulk owing to the strong anti-Stokes processes around the bandgap of the indirect semiconductors. The saturable absorption and self-defocusing of the WS2 nanobelts are significantly enhanced by the plasmon resonance of the Au nanoparticles when Eexc > 1.60 eV. But the excited state absorption assisted by the anti-Stokes processes and the self-focusing observed at Eexc < 1.60 eV are suppressed by the surface plasmon. Furthermore, by using population rate equations, we theoretically analyze the sign reversals of both β and γ and reveal the physical mechanism of the unique nonlinear responses of the hybrids with the plasmon resonance and anti-Stokes effect. These observations enrich the understanding of the nonlinear processes and interactions between the plasmon and exciton and are helpful for developing nonlinear optical nanodevices.
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Affiliation(s)
- Yun-Hang Qiu
- Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China.
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Huang Z, Gao L, Kong L, Zhang HH, Yang JX, Li L. In vivo two-photon imaging/excited photothermal therapy strategy of a silver-nanohybrid. J Mater Chem B 2019; 7:7377-7386. [DOI: 10.1039/c9tb01769k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A multi-functional nanohybrid (PyAnOH-Ag) with both a two-photon photothermal therapy (TP-PTT) effect and two-photon excited fluorescence (TPEF) imaging performance has been fabricated based on interfacial coordination interactions.
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Affiliation(s)
- Ze Huang
- College of Chemistry and Chemical Engineering
- Anhui University
- Hefei 230039
- P. R. China
| | - Li Gao
- School of Food and Biological Engineering
- Hefei University of Technology
- P. R. China
| | - Lin Kong
- College of Chemistry and Chemical Engineering
- Anhui University
- Hefei 230039
- P. R. China
| | - Hui-Hui Zhang
- College of Chemistry and Chemical Engineering
- Anhui University
- Hefei 230039
- P. R. China
| | - Jia-Xiang Yang
- College of Chemistry and Chemical Engineering
- Anhui University
- Hefei 230039
- P. R. China
| | - Lin Li
- Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM)
- National Jiangsu Synergistic Innovation Center for Advanced Materials (SICAM)
- Nanjing Tech University
- Nanjing 211816
- P. R. China
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