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Wu Y, Konečná A, Cho SH, Milliron DJ, Hachtel JA, García de Abajo FJ. Singular and Nonsingular Transitions in the Infrared Plasmons of Nearly Touching Nanocube Dimers. ACS NANO 2024; 18:15130-15138. [PMID: 38804707 DOI: 10.1021/acsnano.4c02644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Narrow gaps between plasmon-supporting materials can confine infrared electromagnetic energy at the nanoscale, thus enabling applications in areas such as optical sensing. However, in nanoparticle dimers, the nature of the transition between touching (zero gap) and nearly nontouching (nonzero gap ≲15 nm) regimes is still a subject of debate. Here, we observe both singular and nonsingular transitions in infrared plasmons confined to dimers of fluorine-doped indium oxide nanocubes when moving from touching to nontouching configurations depending on the dimensionality of the contact region. Through spatially resolved electron energy-loss spectroscopy, we find a continuous spectral evolution of the lowest-order plasmon mode across the transition for finite touching areas, in excellent agreement with the simulations. This behavior challenges the widely accepted idea that a singular transition always emerges in the near-touching regime of plasmonic particle dimers. The apparent contradiction is resolved by theoretically examining different types of gap morphologies, revealing that the presence of a finite touching area renders the transition nonsingular, while one-dimensional and point-like contacts produce a singular behavior in which the lowest-order dipolar mode in the touching configuration, characterized by a net induced charge in each of the particles, becomes unphysical as soon as they are separated. Our results provide valuable insights into the nature of dimer plasmons in highly doped semiconductors.
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Affiliation(s)
- Yina Wu
- the Barcelona Institute of Science and Technology, ICFO-Institut de Ciencies Fotoniques, Castelldefels, Barcelona 08860, Spain
| | - Andrea Konečná
- the Barcelona Institute of Science and Technology, ICFO-Institut de Ciencies Fotoniques, Castelldefels, Barcelona 08860, Spain
- Institute of Physical Engineering, Brno University of Technology, Brno 61669, Czech Republic
- Central European Institute of Technology, Brno University of Technology, Brno 61200, Czech Republic
| | - Shin Hum Cho
- Department of Chemical Engineering, Keimyung University, Daegu 42601, Republic of Korea
| | - Delia J Milliron
- McKetta Department of Chemical Engineering, the University of Texas at Austin, Austin, Texas 78712, United States
| | - Jordan A Hachtel
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Bethel Valley Road, Oak Ridge, Tennessee 37831, United States
| | - F Javier García de Abajo
- the Barcelona Institute of Science and Technology, ICFO-Institut de Ciencies Fotoniques, Castelldefels, Barcelona 08860, Spain
- ICREA-Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys 23, Barcelona 08010, Spain
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Das S, Devireddy R, Gartia MR. Surface Plasmon Resonance (SPR) Sensor for Cancer Biomarker Detection. BIOSENSORS 2023; 13:396. [PMID: 36979608 PMCID: PMC10046379 DOI: 10.3390/bios13030396] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/12/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
A biomarker is a physiological observable marker that acts as a stand-in and, in the best-case scenario, forecasts a clinically significant outcome. Diagnostic biomarkers are more convenient and cost-effective than directly measuring the ultimate clinical outcome. Cancer is among the most prominent global health problems and a major cause of morbidity and death globally. Therefore, cancer biomarker assays that are trustworthy, consistent, precise, and verified are desperately needed. Biomarker-based tumor detection holds a lot of promise for improving disease knowledge at the molecular scale and early detection and surveillance. In contrast to conventional approaches, surface plasmon resonance (SPR) allows for the quick and less invasive screening of a variety of circulating indicators, such as circulating tumor DNA (ctDNA), microRNA (miRNA), circulating tumor cells (CTCs), lipids, and proteins. With several advantages, the SPR technique is a particularly beneficial choice for the point-of-care identification of biomarkers. As a result, it enables the timely detection of tumor markers, which could be used to track cancer development and suppress the relapse of malignant tumors. This review emphasizes advancements in SPR biosensing technologies for cancer detection.
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Kim WG, Devaraj V, Yang Y, Lee JM, Kim JT, Oh JW, Rho J. Three-dimensional plasmonic nanoclusters driven by co-assembly of thermo-plasmonic nanoparticles and colloidal quantum dots. NANOSCALE 2022; 14:16450-16457. [PMID: 36214195 DOI: 10.1039/d2nr03737h] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Metallic nanoparticles that support localized surface plasmons have emerged as fundamental iconic building blocks for nanoscale photonics. Self-assembled clustering of plasmonic nanoparticles with controlled near-field interactions offers an interesting novel route to manipulate the electromagnetic fields at a subwavelength scale. Various bottom-up, self-assembly manners have been successfully devised to build plasmonic nanoparticle clusters displaying attractive optical properties. However, the incapability to configure on-demand architectures limits its practical reliability uses for scalable nanophotonic devices. Furthermore, a critical challenge has been addressing the accurate positioning of functional nanoparticles, including catalytic nanoparticles, dielectric nanoparticles, and quantum dots (QDs) in the clustered plasmonic hotspots. This work proposes a micropipette-based self-assembly method to fabricate three-dimensional architectures composed of colloidal clusters. The heterogeneous colloidal clusters comprising metallic nanoparticles and QDs are fabricated in one step by the micropipette-based self-assembly method. A plasmonic clustered pillar embedding QDs exhibited excellent photoluminescence characteristics compared to a collapsed pillar. The experimental and theoretical demonstration of the localized surface plasmon resonance and thermo-plasmonic properties of the colloidal clusters was performed.
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Affiliation(s)
- Won-Geun Kim
- BIT Fusion Technology Center, Pusan National University, Busan 46241, Republic of Korea.
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.
| | - Vasanthan Devaraj
- BIT Fusion Technology Center, Pusan National University, Busan 46241, Republic of Korea.
| | - Younghwan Yang
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.
| | - Jong-Min Lee
- Center of Nano Convergence Technology and School of Nanoconvergence Technology, Hallym University, Chuncheon 24252, Korea
| | - Ji Tae Kim
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China.
| | - Jin-Woo Oh
- BIT Fusion Technology Center, Pusan National University, Busan 46241, Republic of Korea.
- Department of Nano Fusion Technology, Pusan National University, Busan 46241, Republic of Korea
- Department of Nanoenergy Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Junsuk Rho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
- POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics, Pohang, 37673, Republic of Korea
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Kim WG, Lee JM, Yang Y, Kim H, Devaraj V, Kim M, Jeong H, Choi EJ, Yang J, Jang Y, Badloe T, Lee D, Rho J, Kim JT, Oh JW. Three-Dimensional Plasmonic Nanocluster-Driven Light-Matter Interaction for Photoluminescence Enhancement and Picomolar-Level Biosensing. NANO LETTERS 2022; 22:4702-4711. [PMID: 35622690 DOI: 10.1021/acs.nanolett.2c00790] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Plasmonic nanoparticle clusters promise to support unique engineered electromagnetic responses at optical frequencies, realizing a new concept of devices for nanophotonic applications. However, the technological challenges associated with the fabrication of three-dimensional nanoparticle clusters with programmed compositions remain unresolved. Here, we present a novel strategy for realizing heterogeneous structures that enable efficient near-field coupling between the plasmonic modes of gold nanoparticles and various other nanomaterials via a simple three-dimensional coassembly process. Quantum dots embedded in the plasmonic structures display ∼56 meV of a blue shift in the emission spectrum. The decay enhancement factor increases as the total contribution of radiative and nonradiative plasmonic modes increases. Furthermore, we demonstrate an ultracompact diagnostic platform to detect M13 viruses and their mutations from femtoliter volume, sub-100 pM analytes. This platform could pave the way toward an effective diagnosis of diverse pathogens, which is in high demand for handling pandemic situations.
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Affiliation(s)
- Won-Geun Kim
- BIT Fusion Technology Center, Pusan National University, Busan 46241, Republic of Korea
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Jong-Min Lee
- BIT Fusion Technology Center, Pusan National University, Busan 46241, Republic of Korea
- Center of Nano Convergence Technology and School of Nanoconvergence Technology, Hallym University, Chuncheon 24252, Republic of Korea
| | - Younghwan Yang
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Hongyoon Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Vasanthan Devaraj
- BIT Fusion Technology Center, Pusan National University, Busan 46241, Republic of Korea
| | - Minjun Kim
- Department of Physics, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Hyuk Jeong
- BIT Fusion Technology Center, Pusan National University, Busan 46241, Republic of Korea
| | - Eun-Jung Choi
- BIT Fusion Technology Center, Pusan National University, Busan 46241, Republic of Korea
| | - Jihyuk Yang
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Yudong Jang
- Institute of Quantum Systems (IQS), Chungnam National University, Daejeon 34134, Republic of Korea
| | - Trevon Badloe
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Donghan Lee
- Department of Physics, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Junsuk Rho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics, Pohang 37673, Republic of Korea
| | - Ji Tae Kim
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Jin-Woo Oh
- BIT Fusion Technology Center, Pusan National University, Busan 46241, Republic of Korea
- Department of Nanoenergy Engineering, Pusan National University, Busan 46241, Republic of Korea
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Devaraj V, Choi JW, Lee JM, Oh JW. An Accessible Integrated Nanoparticle in a Metallic Hole Structure for Efficient Plasmonic Applications. MATERIALS 2022; 15:ma15030792. [PMID: 35160740 PMCID: PMC8837044 DOI: 10.3390/ma15030792] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 01/02/2023]
Abstract
Addressing the severe deterioration of gap mode properties in spherical-shaped nanoparticles (NPs) becomes necessary due to their utilization in a wide range of multi-disciplinary applications. In this work, we report an integrated plasmonic nanostructure based on a spherical-shaped nanoparticle (NP) in a metallic hole as an alternative to a NP-only structure. With the help of three-dimensional (3D) electromagnetic simulations, we reveal that when a NP is positioned on the top of a metallic hole, it can exhibit superior gap-mode-based local-field intensity enhancement. The integrated nanostructure displayed a ~22-times increase in near-field enhancement characteristics, similar to cube- or disk-shaped nanostructure’s plasmonic properties. From an experimental perspective, the NP positioning on top of the metallic hole can be realized more easily, facilitating a simple fabrication meriting our design approach. In addition to the above advantages, a good geometrical tolerance (metallic hole-gap size error of ~20 nm) supported by gap mode characteristics enhances flexibility in fabrication. These combined advantages from an integrated plasmonic nanostructure can resolve spherical-shaped NP disadvantages as an individual nanostructure and enhance its utilization in multi-disciplinary applications.
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Affiliation(s)
- Vasanthan Devaraj
- Bio-IT Fusion Technology Research Institute, Pusan National University, Busan 46241, Korea;
| | - Jong-Wan Choi
- Department of Chemistry and Life Science, Sahmyook University, Seoul 01795, Korea;
| | - Jong-Min Lee
- School of Nanoconvergence Technology, Hallym University, Chuncheon 24252, Korea
- Center of Nano Convergence Technology, Hallym University, Chuncheon 24252, Korea
- Correspondence: (J.-M.L.); (J.-W.O.)
| | - Jin-Woo Oh
- Bio-IT Fusion Technology Research Institute, Pusan National University, Busan 46241, Korea;
- Department of Nano Fusion Technology and BK21 Plus Nano Convergence Division, Pusan National University, Busan 46241, Korea
- Department of Nanoenergy Engineering, Pusan National University, Busan 46241, Korea
- Correspondence: (J.-M.L.); (J.-W.O.)
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