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Cheng HW, Xue SY, Li J, Gordon JS, Wang S, Filippone NR, Ngo QM, Zhong CJ. Assessing Plasmonic Nanoprobes in Electromagnetic Field Enhancement for SERS Detection of Biomarkers. SENSORS 2021; 21:s21248345. [PMID: 34960439 PMCID: PMC8706705 DOI: 10.3390/s21248345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 12/11/2021] [Accepted: 12/11/2021] [Indexed: 12/14/2022]
Abstract
The exploration of the plasmonic field enhancement of nanoprobes consisting of gold and magnetic core@gold shell nanoparticles has found increasing application for the development of surface-enhanced Raman spectroscopy (SERS)-based biosensors. The understanding of factors controlling the electromagnetic field enhancement, as a result of the plasmonic field enhancement of the nanoprobes in SERS biosensing applications, is critical for the design and preparation of the optimal nanoprobes. This report describes findings from theoretical calculations of the electromagnetic field intensity of dimer models of gold and magnetic core@gold shell nanoparticles in immunoassay SERS detection of biomarkers. The electromagnetic field intensities for a series of dimeric nanoprobes with antibody–antigen–antibody binding defined interparticle distances were examined in terms of nanoparticle sizes, core–shell sizes, and interparticle spacing. The results reveal that the electromagnetic field enhancement not only depended on the nanoparticle size and the relative core size and shell thicknesses of the magnetic core@shell nanoparticles but also strongly on the interparticle spacing. Some of the dependencies are also compared with experimental data from SERS detection of selected cancer biomarkers, showing good agreement. The findings have implications for the design and optimization of functional nanoprobes for SERS-based biosensors.
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Affiliation(s)
- Han-Wen Cheng
- Laboratory of Advanced Materials, Department of Materials Science, Fudan University, Shanghai 200438, China;
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA; (J.L.); (J.S.G.); (S.W.); (N.R.F.)
- Correspondence: (H.-W.C.); (C.-J.Z.)
| | - Shu-Yan Xue
- Laboratory of Advanced Materials, Department of Materials Science, Fudan University, Shanghai 200438, China;
| | - Jing Li
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA; (J.L.); (J.S.G.); (S.W.); (N.R.F.)
| | - Justine S. Gordon
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA; (J.L.); (J.S.G.); (S.W.); (N.R.F.)
| | - Shan Wang
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA; (J.L.); (J.S.G.); (S.W.); (N.R.F.)
| | - Nina R. Filippone
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA; (J.L.); (J.S.G.); (S.W.); (N.R.F.)
| | - Quang Minh Ngo
- Vietnam Academy of Science and Technology, University of Science and Technology of Hanoi, 18 Hoang Quoc Viet, Cau Giay, Hanoi 11307, Vietnam;
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 11307, Vietnam
| | - Chuan-Jian Zhong
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA; (J.L.); (J.S.G.); (S.W.); (N.R.F.)
- Correspondence: (H.-W.C.); (C.-J.Z.)
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Banchelli M, Nappini S, Montis C, Bonini M, Canton P, Berti D, Baglioni P. Magnetic nanoparticle clusters as actuators of ssDNA release. Phys Chem Chem Phys 2014; 16:10023-31. [PMID: 24487734 DOI: 10.1039/c3cp55470h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
One of the major areas of research in nanomedicine is the design of drug delivery systems with remotely controllable release of the drug. Despite the enormous progress in the field, this aspect still poses a challenge, especially in terms of selectivity and possible harmful interactions with biological components other than the target. We report an innovative approach for the controlled release of DNA, based on clusters of core-shell magnetic nanoparticles. The primary nanoparticles are functionalized with a single-stranded oligonucleotide, whose pairing with a half-complementary strand in solution induces clusterization. The application of a low frequency (6 KHz) alternating magnetic field induces DNA melting with the release of the single strand that induces clusterization. The possibility of steering and localizing the magnetic nanoparticles, and magnetically actuating the DNA release discloses new perspectives in the field of nucleic-acid based therapy.
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Affiliation(s)
- M Banchelli
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, 50019 Florence, Italy.
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