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Tukur F, Bagra B, Jayapalan A, Liu M, Tukur P, Wei J. Plasmon-Exciton Coupling Effect in Nanostructured Arrays for Optical Signal Amplification and SARS-CoV-2 DNA Sensing. ACS APPLIED NANO MATERIALS 2023; 6:2071-2082. [PMID: 36789152 PMCID: PMC9888407 DOI: 10.1021/acsanm.2c05063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 01/09/2023] [Indexed: 06/18/2023]
Abstract
A surface plasmon resonance (SPR)-enhanced optical signal using a nanoslit array and acridine orange (AO) dye system at a flexible poly(dimethylsiloxane) (PDMS) substrate was achieved in this work and demonstrated a simple sensing scheme to directly detect SARS-CoV-2 nucleic acid via DNA hybridization. A simple nanoimprinting pattern transfer technique was introduced to form uniform reproducible nanoslit arrays where the dimensions of the slit array were controlled by the thickness of the gold film. The plasmon-exciton coupling effect on the optical enhancement of different dye molecules, i.e., AO, propidium iodide (PI), or dihydroethidium (DHE) attached to the nanoslit surfaces, was examined thoroughly by measuring the surface reflection and fluorescence imaging. The results indicate that the best overlap of the plasmon resonance wavelength to the excitation spectrum of AO presented the largest optical enhancement (∼57×) compared to the signal at flat gold surfaces. Based on this finding, a sensitive assay for detecting DNA hybridization was generated using the interaction of the selected SARS-CoV-2 ssDNA and dsDNA with AO to trigger the metachromatic behavior of the dye at the nanoarray surfaces. We found strong optical signal amplification on the formation of acridine-ssDNA complexes and a quenched signal upon hybridization to the complementary target DNA (ct-DNA) along with a blue shift in the fluorescence of AO-dsDNAs. A quantitative evaluation of the ct-DNA concentration in a range of 100-0.08 nM using both the reflection and emission imaging signals demonstrated two linear regimes with a lowest detection limit of 0.21 nM. The sensing method showed high sensitivity and distinguished signals from 1-, 2-, and 3-base mismatched DNA targets, as well as high stability and reusability. This approach toward enhancing optical signal for DNA sensing offers promise in a general, rapid, and direct vision detection method for nucleic acid analytes.
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Zhao X, Wang A, Gao S, Yan D, Guo W, Xu Y, Meng Y, Wang C, Shan G. Enhancing photoluminescence of carbon quantum dots doped PVA films with randomly dispersed silica microspheres. Sci Rep 2020; 10:5710. [PMID: 32235901 PMCID: PMC7109140 DOI: 10.1038/s41598-020-62563-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 03/16/2020] [Indexed: 11/16/2022] Open
Abstract
As a kind of excellent photoluminescent material, carbon quantum dots have been extensively studied in many fields, including biomedical applications and optoelectronic devices. They have been dispersed in polymer matrices to form luminescent films which can be used in LEDs, displays, sensors, etc. Owing to the total internal reflection at the flat polymer/air interfaces, a significant portion of the emitted light are trapped and dissipated. In this paper, we fabricate free standing flexible PVA films with photoluminescent carbon quantum dots embedded in them. We disperse silica microspheres at the film surfaces to couple out the total internal reflection. The effects of sphere densities and diameters on the enhancement of photoluminescence are experimentally investigated with a homemade microscope. The enhancement of fluorescence intensity is as high as 1.83 when the film is fully covered by spheres of 0.86 [Formula: see text]m diameter. It is worth noting that the light extraction originates from rather the scattering of individual spheres than the diffraction of ordered arrays. The mechanism of scattering is confirmed by numerical simulations. The simulated results show that the evanescent wave at the flat PVA/air interface can be effectively scattered out of the film.
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Affiliation(s)
- Xun Zhao
- Center for Advanced optoelectronic Functional Materials Research and Key Laboratory for UV light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, 130024, PR China
| | - Ailin Wang
- Center for Advanced optoelectronic Functional Materials Research and Key Laboratory for UV light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, 130024, PR China
| | - Sili Gao
- Key Laboratory of Infrared System Detection and Imaging Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, PR China
| | - Duanting Yan
- Center for Advanced optoelectronic Functional Materials Research and Key Laboratory for UV light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, 130024, PR China
| | - Wanying Guo
- Center for Advanced optoelectronic Functional Materials Research and Key Laboratory for UV light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, 130024, PR China
| | - Yingyue Xu
- Center for Advanced optoelectronic Functional Materials Research and Key Laboratory for UV light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, 130024, PR China
| | - Yanli Meng
- Center for Advanced optoelectronic Functional Materials Research and Key Laboratory for UV light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, 130024, PR China
| | - Chunliang Wang
- Center for Advanced optoelectronic Functional Materials Research and Key Laboratory for UV light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, 130024, PR China.
| | - Guiye Shan
- Center for Advanced optoelectronic Functional Materials Research and Key Laboratory for UV light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, 130024, PR China.
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Wang X, Gao T, Yang M, Zhao J, Jiang FL, Liu Y. Microwave-assisted synthesis, characterization, cell imaging of fluorescent carbon dots using l-asparagine as precursor. NEW J CHEM 2019. [DOI: 10.1039/c8nj05421e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Structure-analyzed carbon dots fabricated from a green raw material by a time-saving method.
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Affiliation(s)
- Xi Wang
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Tian Gao
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Mian Yang
- Hubei Province Key Laboratory for Coal Conversion and New Carbon Materials
- School of Chemistry and Chemical Engineering
- Wuhan University of Science and Technology
- Wuhan 430081
- P. R. China
| | - Jie Zhao
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Feng-Lei Jiang
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Yi Liu
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
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Gan Z, Liu L, Wang L, Luo G, Mo C, Chang C. Bright, stable, and tunable solid-state luminescence of carbon nanodot organogels. Phys Chem Chem Phys 2018; 20:18089-18096. [DOI: 10.1039/c8cp02069h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Stable, bright, and tunable solid-state luminescence was achieved in carbon nanodots through engineering photon reabsorption.
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Affiliation(s)
- Zhixing Gan
- Key Laboratory of Optoelectronic Technology of Jiangsu Province
- School of Physics and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Lizhe Liu
- National Laboratory of Solid State Microstructures
- Nanjing University
- Nanjing 210093
- China
| | - Li Wang
- School of Materials Science and Engineering
- Nanchang University
- Nanchang 330031
- China
| | - Guangsheng Luo
- School of Materials Science and Engineering
- Nanchang University
- Nanchang 330031
- China
| | - Chunlan Mo
- School of Materials Science and Engineering
- Nanchang University
- Nanchang 330031
- China
| | - Chenliang Chang
- Key Laboratory of Optoelectronic Technology of Jiangsu Province
- School of Physics and Technology
- Nanjing Normal University
- Nanjing 210023
- China
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Wu P, Li W, Wu Q, Liu Y, Liu S. Hydrothermal synthesis of nitrogen-doped carbon quantum dots from microcrystalline cellulose for the detection of Fe3+ ions in an acidic environment. RSC Adv 2017. [DOI: 10.1039/c7ra08400e] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Nitrogen-doped carbon quantum dots prepared with microcrystalline cellulose display excellent sensitivity to Fe3+via dynamic quenching in an acidic environment.
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Affiliation(s)
- Peng Wu
- College of Materials Science and Engineering
- Northeast Forestry University
- Harbin
- P. R. China
- College of Environmental and Chemical Engineering
| | - Wei Li
- College of Materials Science and Engineering
- Northeast Forestry University
- Harbin
- P. R. China
| | - Qiong Wu
- College of Materials Science and Engineering
- Northeast Forestry University
- Harbin
- P. R. China
| | - Yushan Liu
- College of Materials Science and Engineering
- Northeast Forestry University
- Harbin
- P. R. China
| | - Shouxin Liu
- College of Materials Science and Engineering
- Northeast Forestry University
- Harbin
- P. R. China
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