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Bowman AR, Rodríguez Echarri A, Kiani F, Iyikanat F, Tsoulos TV, Cox JD, Sundararaman R, García de Abajo FJ, Tagliabue G. Quantum-mechanical effects in photoluminescence from thin crystalline gold films. LIGHT, SCIENCE & APPLICATIONS 2024; 13:91. [PMID: 38637531 PMCID: PMC11026419 DOI: 10.1038/s41377-024-01408-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 02/01/2024] [Accepted: 02/06/2024] [Indexed: 04/20/2024]
Abstract
Luminescence constitutes a unique source of insight into hot carrier processes in metals, including those in plasmonic nanostructures used for sensing and energy applications. However, being weak in nature, metal luminescence remains poorly understood, its microscopic origin strongly debated, and its potential for unraveling nanoscale carrier dynamics largely unexploited. Here, we reveal quantum-mechanical effects in the luminescence emanating from thin monocrystalline gold flakes. Specifically, we present experimental evidence, supported by first-principles simulations, to demonstrate its photoluminescence origin (i.e., radiative emission from electron/hole recombination) when exciting in the interband regime. Our model allows us to identify changes to the measured gold luminescence due to quantum-mechanical effects as the gold film thickness is reduced. Excitingly, such effects are observable in the luminescence signal from flakes up to 40 nm in thickness, associated with the out-of-plane discreteness of the electronic band structure near the Fermi level. We qualitatively reproduce the observations with first-principles modeling, thus establishing a unified description of luminescence in gold monocrystalline flakes and enabling its widespread application as a probe of carrier dynamics and light-matter interactions in this material. Our study paves the way for future explorations of hot carriers and charge-transfer dynamics in a multitude of material systems.
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Affiliation(s)
- Alan R Bowman
- Laboratory of Nanoscience for Energy Technologies (LNET), STI, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Alvaro Rodríguez Echarri
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels (Barcelona), Spain
- MBI-Max-Born-Institut, Berlin, Germany
| | - Fatemeh Kiani
- Laboratory of Nanoscience for Energy Technologies (LNET), STI, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Fadil Iyikanat
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels (Barcelona), Spain
| | - Ted V Tsoulos
- Laboratory of Nanoscience for Energy Technologies (LNET), STI, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Joel D Cox
- POLIMA-Center for Polariton-driven Light-Matter Interactions, University of Southern Denmark, Odense M, Denmark
- Danish Institute for Advanced Study, University of Southern Denmark, Odense M, Denmark
| | - Ravishankar Sundararaman
- Department of Materials Science & Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA
- Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY, USA
| | - F Javier García de Abajo
- ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels (Barcelona), Spain
- ICREA-Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
| | - Giulia Tagliabue
- Laboratory of Nanoscience for Energy Technologies (LNET), STI, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
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2
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Anand V, Pandey A. Synthesis and characterization of CeO 2 and SiO 2 nanoparticles and their effect on growth parameters and the antioxidant defense system in Vigna mungo L. Hepper. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:100814-100827. [PMID: 37644264 DOI: 10.1007/s11356-023-29415-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 08/16/2023] [Indexed: 08/31/2023]
Abstract
Engineered nanoparticles (NPs) have recently attracted a lot of attention after being tested in various agricultural plants. This paper reports the green synthesis of CeO2 NPs and SiO2 NPs from leaf extracts of Nyctanthes arbor-tristis. The physical characteristics of the produced nanoparticles were then determined using UV-visible spectroscopy, transmission electron microscopy (TEM), fluorescence spectroscopy, and Fourier transform infrared spectroscopy (FTIR). Furthermore, the interaction effects of cerium oxide NPs (C1, C2, and C3) and silicon dioxide NPs (S1, S2, and S3) at 10 mg/L on blackgram (Vigna mungo L.) were evaluated. CeO2 and SiO2 NPs treatments enhanced the growth performance of the plants by causing a decrease in superoxide radical (SOR) and H2O2 via improving antioxidant enzymes. These findings imply that the size and shape of CeO2 and SiO2 NPs provide defense against oxidative damage to the blackgram.
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Affiliation(s)
- Vandita Anand
- Department of Biotechnology, Motilal Nehru National Institute of Technology (MNNIT) Allahabad, Prayagraj, 211004, India
| | - Anjana Pandey
- Department of Biotechnology, Motilal Nehru National Institute of Technology (MNNIT) Allahabad, Prayagraj, 211004, India.
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3
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Sivan Y, Un IW, Kalyan I, Lin KQ, Lupton JM, Bange S. Crossover from Nonthermal to Thermal Photoluminescence from Metals Excited by Ultrashort Light Pulses. ACS NANO 2023. [PMID: 37289597 DOI: 10.1021/acsnano.3c01016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Photoluminescence from metal nanostructures following intense ultrashort illumination is a fundamental aspect of light-matter interactions. Surprisingly, many of its basic characteristics are under ongoing debate. Here, we resolve many of these debates by providing a comprehensive theoretical framework that describes this phenomenon and support it by an experimental confirmation. Specifically, we identify aspects of the emission that are characteristic to either nonthermal or thermal emission, in particular, differences in the spectral and electric field dependence of these two contributions to the emission. Overall, nonthermal emission is characteristic of the early stages of light emission, while the later stages show thermal characteristics. The former dominate only for moderately high illumination intensities for which the electron temperature reached after thermalization remains close to room temperature.
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Affiliation(s)
- Yonatan Sivan
- School of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Be'er Sheva 8410501, Israel
| | - Ieng Wai Un
- School of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Be'er Sheva 8410501, Israel
| | - Imon Kalyan
- School of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Be'er Sheva 8410501, Israel
| | - Kai-Qiang Lin
- Chemistry of Solid Surfaces Department of Chemistry, Xiamen University, 361005 Xiamen, China
| | - John M Lupton
- Institut für Experimentelle und Angewandte Physik, Universität Regensburg, 93051 Regensburg, Germany
| | - Sebastian Bange
- Institut für Experimentelle und Angewandte Physik, Universität Regensburg, 93051 Regensburg, Germany
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4
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Padre S, Kiruthika S, Mundinamani S, Ravikirana, Surabhi S, Jeong JR, Eshwarappa KM, Murari MS, Shetty V, Ballal M, S. C. G. Mono- and Bimetallic Nanoparticles for Catalytic Degradation of Hazardous Organic Dyes and Antibacterial Applications. ACS OMEGA 2022; 7:35023-35034. [PMID: 36211055 PMCID: PMC9535655 DOI: 10.1021/acsomega.2c03784] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/29/2022] [Indexed: 11/08/2023]
Abstract
In the present work, gold (Au), silver (Ag), and copper (Cu) based mono- and bimetallic NPs are prepared using a cost-effective facile wet chemical route. The pH for the synthesis is optimized in accordance with the optical spectra and supported by the finite difference time domain simulation studies. FESEM and TEM micrographs are used to analyze the morphology of the prepared nanoparticles. TEM images of bimetallic nanoparticles (BMPs) verified their bimetallic nature. XRD studies confirmed the formation of fcc-structured mono- and bimetallic NPs. Photoluminescence studies of the as-synthesized NPs are in good agreement with the previous publications. These synthesized NPs showed enhanced catalytic activity for the reduction/degradation of 4-nitrophenol, rhodamine B, and indigo carmine dyes in the presence of sodium borohydride (NaBH4) compared to NaBH4 alone. For the reduction of 4-nitrophenol, Au, Cu, and CuAg nanoparticles exhibited good catalytic efficiency compared to others, whereas for the degradation of rhodamine B and indigo carmine dyes the catalytic efficiency is comparatively high for CuAg BMPs. Furthermore, the antibacterial assay is carried out, and Ag NPs display effective antibacterial activity against Klebsiella pneumoniae, Salmonella ser. Typhimurium, Acinetobacter baumannii, Shigella flexneri, and Pseudomonas aeruginosa.
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Affiliation(s)
- Shilpa
Molakkalu Padre
- Nanomaterials
and Polymer Physics Lab, Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
- Department
of Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - S. Kiruthika
- Department
of Physics, School of Electrical & Electronics Engineering (SEEE), SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | - Shridhar Mundinamani
- Department
of Physics, Siddaganga Institute of Technology, Tumakuru 572103, Karnataka, India
| | - Ravikirana
- Department
of Physics and Nanotechnology, SRM Institute
of Science and Technology, Kattankulathur 603203, Tamil Nadu, India
| | - Srivathsava Surabhi
- Laboratorio
de Nanocompuestos, Departamento de Ingeniería de Materiales
(DIMAT), Facultad de Ingeniería (FI), Universidad de Concepción (UdeC), Concepción 4030000, Chile
- Department
of Materials Science and Engineering, Graduate School of Energy Science
and Technology, Chungnam National University, Daejeon 34134, South Korea
| | - Jong-Ryul Jeong
- Department
of Materials Science and Engineering, Graduate School of Energy Science
and Technology, Chungnam National University, Daejeon 34134, South Korea
| | | | | | - Vignesh Shetty
- Department
of Medicine, University of Cambridge, Cambridge CB2 1TN, United Kingdom
| | - Mamatha Ballal
- Department
of Microbiology, Kasturba Medical College, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Gurumurthy S. C.
- Nanomaterials
and Polymer Physics Lab, Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
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5
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Ni Y, Kan C, Xu J. Optimized plasmonic performances and derivate applications of Au nanobipyramids. Phys Chem Chem Phys 2022; 24:21522-21537. [PMID: 36082804 DOI: 10.1039/d2cp02811e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold nanobipyramids (AuBPs) with narrow size distribution and high monodispersity have driven intensive attention because they display more advantageous plasmonic properties than gold nanorods (AuNRs). Applications of AuBPs based on tunable plasmonic properties and enhanced electromagnetic fields are being widely investigated in recent years. In this article, we focused on the preparation of well-defined AuBPs using the seed-mediated method, the plasmonic properties, and the exploration of AuBP-supported derivatives. The synergetic contributions of penta-twinned and appropriate growth environment could produce high-purity AuBPs. Systematic comparisons of plasmonic properties between AuBPs and AuNRs are illustrated. In addition, the well-defined AuBPs can be used as a template to synthesize multi-metallic nanostructures. The development of the epitaxial growth based on the AuBPs and corresponding applications are introduced. This study will provide a guide for the fabrication of composite nanostructures and advance their plasmonic applications.
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Affiliation(s)
- Yuan Ni
- College of Science, Jinling Institute of Technology, Nanjing 210016, China.
| | - Caixia Kan
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
| | - Juan Xu
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
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6
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Cai YY, Tauzin LJ, Ostovar B, Lee S, Link S. Light emission from plasmonic nanostructures. J Chem Phys 2021; 155:060901. [PMID: 34391373 DOI: 10.1063/5.0053320] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The mechanism of light emission from metallic nanoparticles has been a subject of debate in recent years. Photoluminescence and electronic Raman scattering mechanisms have both been proposed to explain the observed emission from plasmonic nanostructures. Recent results from Stokes and anti-Stokes emission spectroscopy of single gold nanorods using continuous wave laser excitation carried out in our laboratory are summarized here. We show that varying excitation wavelength and power change the energy distribution of hot carriers and impact the emission spectral lineshape. We then examine the role of interband and intraband transitions in the emission lineshape by varying the particle size. We establish a relationship between the single particle emission quantum yield and its corresponding plasmonic resonance quality factor, which we also tune through nanorod crystallinity. Finally, based on anti-Stokes emission, we extract electron temperatures that further suggest a hot carrier based mechanism. The central role of hot carriers in our systematic study on gold nanorods as a model system supports a Purcell effect enhanced hot carrier photoluminescence mechanism. We end with a discussion on the impact of understanding the light emission mechanism on fields utilizing hot carrier distributions, such as photocatalysis and nanothermometry.
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Affiliation(s)
- Yi-Yu Cai
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, USA
| | - Lawrence J Tauzin
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, USA
| | - Behnaz Ostovar
- Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, USA
| | - Stephen Lee
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, USA
| | - Stephan Link
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, USA
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7
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One-photon excited photoluminescence of gold nanospheres and its application in prostate specific antigen detection via fluorescence correlation spectroscopy (FCS). Talanta 2021; 228:122242. [PMID: 33773714 DOI: 10.1016/j.talanta.2021.122242] [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] [Received: 01/04/2021] [Revised: 02/17/2021] [Accepted: 02/19/2021] [Indexed: 12/17/2022]
Abstract
Gold nanoparticles are known to exhibit appealing intrinsic plasmon-modulated photoluminescence (PL) properties which can be explored in various fluorescence-based sensing applications. In this paper, we evaluate the PL of different-sized gold nanospheres (AuNSs) under one-photon excitation (1PE) and develop a sensitive homogeneous immunoassay for the detection of prostate specific antigen (PSA) in colloidal suspension via fluorescence correlation spectroscopy (FCS). The 1PE PL of AuNSs of three different sizes are evaluated in solution phase under excitation at 405 nm via steady-state fluorescence spectroscopy measurements, while FCS analysis emphasizes the feasibility of using 1PE PL properties to monitor their diffusion behavior. Fluorescence lifetime imaging microscopy (FLIM) assays coupled with PL spectral profile analysis performed on single-particles-like structures conform the plasmonic origin of the detected PL and validate their potential of synthesized AuNSs as fluorescent probes in bioimaging and bioassays. Finally, to the best of our knowledge, we provide the first demonstration of the successful use of the 1PE PL of the synthesized AuNSs as probes for the FCS-based one-step label-free sensitive optical detection of PSA biomarker. The approach consisting in monitoring the diffusion of the AuNSs-oligomers induced by the interaction of anti-PSA-conjugated AuNSs with PSA molecules is successfully validated for the detection of PSA levels as low as 4.4 ng/ml in solution. Considering that the development of rapid, efficient and label-free biosensing methods is of continuous interest nowadays, we are confident that our results may have a strong impact on medicine towards more efficient, sensitive and reliable diagnosis.
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8
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Abstract
We provide a complete quantitative theory for light emission from Drude metals under continuous wave illumination, based on our recently derived steady-state nonequilibrium electron distribution. We show that the electronic contribution to the emission exhibits a dependence on the emission frequency which is very similar to the energy dependence of the nonequilibrium distribution, and characterize different scenarios determining the measurable emission line shape. This enables the identification of experimentally relevant situations, where the emission lineshapes deviate significantly from predictions based on the standard theory (namely, on the photonic density of states), and enables the differentiation between cases where the emission scales with the metal object surface or with its volume. We also provide an analytic description (which is absent from the literature) of the (polynomial) dependence of the metal emission on the electric field, its dependence on the pump laser frequency, and its nontrivial exponential dependence on the electron temperature, both for the Stokes and anti-Stokes regimes. Our results imply that the emission does not originate from either Fermion statistics (due to e-e interactions), and even though one could have expected the emission to follow boson statistics due to involvement of photons (as in Planck's Black Body emission), it turns out that it deviates from that form as well. Finally, we resolve the arguments associated with the effects of electron and lattice temperatures on the emission, and which of them can be extracted from the anti-Stokes emission.
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Affiliation(s)
- Yonatan Sivan
- School of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Be'er sheva, Israel 8410501
| | - Yonatan Dubi
- Department of Chemistry, Ben-Gurion University of the Negev, Be'er sheva, Israel 8410501
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9
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Manuel AP, Shankar K. Hot Electrons in TiO 2-Noble Metal Nano-Heterojunctions: Fundamental Science and Applications in Photocatalysis. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1249. [PMID: 34068571 PMCID: PMC8151081 DOI: 10.3390/nano11051249] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/03/2021] [Accepted: 05/05/2021] [Indexed: 01/06/2023]
Abstract
Plasmonic photocatalysis enables innovation by harnessing photonic energy across a broad swathe of the solar spectrum to drive chemical reactions. This review provides a comprehensive summary of the latest developments and issues for advanced research in plasmonic hot electron driven photocatalytic technologies focusing on TiO2-noble metal nanoparticle heterojunctions. In-depth discussions on fundamental hot electron phenomena in plasmonic photocatalysis is the focal point of this review. We summarize hot electron dynamics, elaborate on techniques to probe and measure said phenomena, and provide perspective on potential applications-photocatalytic degradation of organic pollutants, CO2 photoreduction, and photoelectrochemical water splitting-that benefit from this technology. A contentious and hitherto unexplained phenomenon is the wavelength dependence of plasmonic photocatalysis. Many published reports on noble metal-metal oxide nanostructures show action spectra where quantum yields closely follow the absorption corresponding to higher energy interband transitions, while an equal number also show quantum efficiencies that follow the optical response corresponding to the localized surface plasmon resonance (LSPR). We have provided a working hypothesis for the first time to reconcile these contradictory results and explain why photocatalytic action in certain plasmonic systems is mediated by interband transitions and in others by hot electrons produced by the decay of particle plasmons.
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Affiliation(s)
- Ajay P. Manuel
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada;
| | - Karthik Shankar
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada;
- Future Energy Systems Research Institute, University of Alberta, Edmonton, AB T6G 1K4, Canada
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10
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Trotsiuk L, Muravitskaya A, Kulakovich O, Guzatov D, Ramanenka A, Kelestemur Y, Demir HV, Gaponenko S. Plasmon-enhanced fluorescence in gold nanorod-quantum dot coupled systems. NANOTECHNOLOGY 2020; 31:105201. [PMID: 31751975 DOI: 10.1088/1361-6528/ab5a0e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Plasmon-exciton coupling is of great importance to many optical devices and applications. One of the coupling manifestations is plasmon-enhanced fluorescence. Although this effect is demonstrated in numerous experimental and theoretical works, there are different particle shapes for which this effect is not fully investigated. In this work electrostatic complexes of gold nanorods and CdSe/CdZnS quantum dots were studied. Double-resonant gold nanorods have an advantage of the simultaneous enhancement of the absorption and emission when the plasmon bands match the excitation and fluorescence wavelengths of an emitter. A relationship between the concentration of quantum dots in the complexes and the enhancement factor was established. It was demonstrated that the enhancement factor is inversely proportional to the concentration of quantum dots. The maximal fluorescence enhancement by 10.8 times was observed in the complex with the smallest relative concentration of 2.5 quantum dots per rod and approximately 5 nm distance between them. Moreover, the influence of quantum dot location on the gold nanorod surface plays an important role. Theoretical study and experimental data indicate that only the position near the nanorod ends provides the enhancement. At the same time, the localization of quantum dots on the sides of the nanorods leads to the fluorescence quenching.
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Affiliation(s)
- Liudmila Trotsiuk
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk 220072, Belarus
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11
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You PY, Li FC, Liu MH, Chan YH. Colorimetric and Fluorescent Dual-Mode Immunoassay Based on Plasmon-Enhanced Fluorescence of Polymer Dots for Detection of PSA in Whole Blood. ACS APPLIED MATERIALS & INTERFACES 2019; 11:9841-9849. [PMID: 30784256 DOI: 10.1021/acsami.9b00204] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although enormous efforts have been devoted to the development of new types of fluorometric immunochromatographic test strip (ICTS) with improved sensitivity over the past years, it still remains a big challenge to design ICTS with colorimetric and fluorescent bimodal signal readout for rapid yet accurate detection of cancer markers in a clinic. Scientists have tried to prepare bimodal reporters by combining fluorescent dyes with metal nanomaterials, but their fluorescence was easily quenched by metal nanomaterials through surface energy transfer, making dual colorimetric and fluorometric ICTS very difficult to be achieved. As compared to conventional fluorescent probes, semiconducting polymer dots (Pdots) exhibit extraordinary fluorescence brightness and facile surface functionalization, which are very suitable to be engineered as bimodal signal reporting reagents. Here, we integrated highly fluorescent Pdots with strongly plasmonic Au nanorods to form Pdot-Au hybrid nanocomposites with dual colorimetric and fluorescent readout abilities. We further utilized these nanohybrids in ICTS for qualitatively fast screening (colorimetry) as well as quantitatively accurate determination (fluorometry) of prostate-specific antigen (PSA) within 10 min. By taking advantage of the plasmon-enhanced fluorescence of Pdots on Au nanorods, this immunoassay possesses much better detection sensitivity of 1.07 pg/mL for PSA, which is at least 2 orders of magnitude lower than that of conventional fluorometric ICTS. Moreover, the direct detection of PSA from human whole blood collected without sample pretreatment makes this Pdot-based ICTS platform promising for on-site point-of-care diagnostics.
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Affiliation(s)
- Pei-Yun You
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30050 , Taiwan
| | - Fang-Chu Li
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30050 , Taiwan
| | - Ming-Ho Liu
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30050 , Taiwan
| | - Yang-Hsiang Chan
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 30050 , Taiwan
- Department of Medicinal and Applied Chemistry , Kaohsiung Medical University , Kaohsiung 30050 , Taiwan
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12
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Wang X, Jian J, Diaz-Amaya S, Kumah CE, Lu P, Huang J, Lim DG, Pol VG, Youngblood JP, Boltasseva A, Stanciu LA, O'Carroll DM, Zhang X, Wang H. Hybrid plasmonic Au-TiN vertically aligned nanocomposites: a nanoscale platform towards tunable optical sensing. NANOSCALE ADVANCES 2019; 1:1045-1054. [PMID: 36133204 PMCID: PMC9473282 DOI: 10.1039/c8na00306h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 11/27/2018] [Indexed: 05/29/2023]
Abstract
Tunable plasmonic structure at the nanometer scale presents enormous opportunities for various photonic devices. In this work, we present a hybrid plasmonic thin film platform: i.e., a vertically aligned Au nanopillar array grown inside a TiN matrix with controllable Au pillar density. Compared to single phase plasmonic materials, the presented tunable hybrid nanostructures attain optical flexibility including gradual tuning and anisotropic behavior of the complex dielectric function, resonant peak shifting and change of surface plasmon resonances (SPRs) in the UV-visible range, all confirmed by numerical simulations. The tailorable hybrid platform also demonstrates enhanced surface plasmon Raman response for Fourier-transform infrared spectroscopy (FTIR) and photoluminescence (PL) measurements, and presents great potentials as designable hybrid platforms for tunable optical-based chemical sensing applications.
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Affiliation(s)
- Xuejing Wang
- Department of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Jie Jian
- Department of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Susana Diaz-Amaya
- Department of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Cindy E Kumah
- Department of Materials Science and Engineering, Rutgers University Piscataway New Jersey 08854 USA
| | - Ping Lu
- Sandia National Laboratories Albuquerque New Mexico 87185 USA
| | - Jijie Huang
- Department of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Daw Gen Lim
- Department of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Vilas G Pol
- Department of Chemical Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Jeffrey P Youngblood
- Department of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Alexandra Boltasseva
- Department of Electrical Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Lia A Stanciu
- Department of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Deirdre M O'Carroll
- Department of Materials Science and Engineering, Rutgers University Piscataway New Jersey 08854 USA
| | - Xinghang Zhang
- Department of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
| | - Haiyan Wang
- Department of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA
- Department of Electrical Engineering, Purdue University West Lafayette Indiana 47907 USA
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13
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Cai YY, Sung E, Zhang R, Tauzin LJ, Liu JG, Ostovar B, Zhang Y, Chang WS, Nordlander P, Link S. Anti-Stokes Emission from Hot Carriers in Gold Nanorods. NANO LETTERS 2019; 19:1067-1073. [PMID: 30657694 DOI: 10.1021/acs.nanolett.8b04359] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The origin of light emission from plasmonic nanoparticles has been strongly debated lately. It is present as the background of surface-enhanced Raman scattering and, despite the low yield, has been used for novel sensing and imaging applications because of its photostability. Although the role of surface plasmons as an enhancing antenna is widely accepted, the main controversy regarding the mechanism of the emission is its assignment to either radiative recombination of hot carriers (photoluminescence) or electronic Raman scattering (inelastic light scattering). We have previously interpreted the Stokes-shifted emission from gold nanorods as the Purcell effect enhanced radiative recombination of hot carriers. Here we specifically focused on the anti-Stokes emission from single gold nanorods of varying aspect ratios with excitation wavelengths below and above the interband transition threshold while still employing continuous wave lasers. Analysis of the intensity ratios between Stokes and anti-Stokes emission yields temperatures that can only be interpreted as originating from the excited electron distribution and not a thermally equilibrated phonon population despite not using pulsed laser excitation. Consistent with this result as well as previous emission studies using ultrafast lasers, the power-dependence of the upconverted emission is nonlinear and gives the average number of participating photons as a function of emission wavelength. Our findings thus show that hot carriers and photoluminescence play a major role in the upconverted emission.
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14
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Kwon OH, Jang JW, Park SJ, Kim JS, Hong SJ, Jung YS, Yang H, Kim YJ, Cho YS. Plasmonic-Enhanced Luminescence Characteristics of Microscale Phosphor Layers on a ZnO Nanorod-Arrayed Glass Substrate. ACS APPLIED MATERIALS & INTERFACES 2019; 11:1004-1012. [PMID: 30511826 DOI: 10.1021/acsami.8b13767] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We present a planar luminescent layer for glare-free, long-lifespan white light-emitting diodes (LEDs), with attractive light outputs. The novel and facile remote phosphor approach proposed in this work enhances luminescence properties by combining a waveguiding ZnO-based nanostructure with plasmonic Au nanoparticles. The system comprised a microscale yellow phosphor layer that is applied by simple printing onto an Au nanoparticle-dispersed ZnO nanorod array. This architecture resulted in a considerable enhancement in luminous efficacy of approximately 18% because of the combination of waveguide effects from the nanorod structure and plasmonic effects from the Au nanoparticles. Performance was optimized according to the length of the Zn nanorods and the concentration of Au. An optimal efficiency of ∼84.26 lm/W for a silicate phosphor-converted LED was achieved using long ZnO nanorods and an Au concentration of 12.5 ppm. The finite-difference time-domain method was successfully used to verify the luminous efficacy improvements in the Au nanoparticle-intervened nanostructures via the waveguiding and plasmonic effects.
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Affiliation(s)
| | | | | | - Jun Sik Kim
- R&D Center , LG Display Co., Ltd , Paju-si , Gyeonggi-do 10843 , Korea
| | | | | | - Heesun Yang
- Department of Materials Science & Engineering , Hongik University , Seoul 04006 , Korea
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15
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Cheng Y, Zhang W, Zhao J, Wen T, Hu A, Gong Q, Lu G. Understanding photoluminescence of metal nanostructures based on an oscillator model. NANOTECHNOLOGY 2018; 29:315201. [PMID: 29757167 DOI: 10.1088/1361-6528/aac44f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Scattering and absorption properties of metal nanostructures have been well understood based on the classic oscillator theory. Here, we demonstrate that photoluminescence of metal nanostructures can also be explained based on a classic model. The model shows that inelastic radiation of an oscillator resembles its resonance band after external excitation, and is related to the photoluminescence from metallic nanostructures. The understanding based on the classic oscillator model is in agreement with that predicted by a quantum electromagnetic cavity model. Moreover, by correlating a two-temperature model and the electron distributions, we demonstrate that both one-photon and two-photon luminescence of the metal nanostructures undergo the same mechanism. Furthermore, the model explains most of the emission characteristics of the metallic nanostructures, such as quantum yield, spectral shape, excitation polarization and power dependence. The model based on an oscillator provides an intuitive description of the photoluminescence process and may enable rapid optimization and exploration of the plasmonic properties.
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Affiliation(s)
- Yuqing Cheng
- State Key Laboratory for Mesoscopic Physics & Collaborative Innovation Center of Quantum Matter, Department of Physics, Peking University, Beijing 100871, People's Republic of China
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16
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Wang J, Gürdal E, Horneber A, Dickreuter S, Kostcheev S, Meixner AJ, Fleischer M, Adam PM, Zhang D. Carrier recombination and plasmonic emission channels in metallic photoluminescence. NANOSCALE 2018; 10:8240-8245. [PMID: 29682663 DOI: 10.1039/c7nr07821h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We systematically investigate the metallic photoluminescence (MPL) emitted from plasmonic nanoparticles (NPs) upon excitation with ultrafast laser pulses using a scanning confocal optical microscope (SCOM). By comparing the emission spectra of Au NPs of varying dimensions with the corresponding dark-field scattering spectra, indications are found that MPL encompasses two emission channels: the particle plasmons (PPs) and the electron-hole (e-h) pair recombination. The plasmons can be interpreted to play a twofold role: in the excitation process they provide the local field enhancement, and in the emission process they offer extra radiation channels.
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Affiliation(s)
- Jiyong Wang
- Institute of Physical and Theoretical Chemistry, Eberhard Karls University of Tübingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany.
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17
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Wei H, Leng W, Song J, Willner MR, Marr LC, Zhou W, Vikesland PJ. Improved Quantitative SERS Enabled by Surface Plasmon Enhanced Elastic Light Scattering. Anal Chem 2018; 90:3227-3237. [PMID: 29356519 PMCID: PMC5981291 DOI: 10.1021/acs.analchem.7b04667] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 01/22/2018] [Indexed: 01/05/2023]
Abstract
The application of surface-enhanced Raman spectroscopy (SERS) for everyday quantitative analysis is hindered by the point-to-point variability of SERS substrates that arises due to the heterogeneous distribution of localized electromagnetic fields across a suite of plasmonic nanostructures. Herein, we adopt surface-enhanced elastic scattering as a SERS internal standard. Both elastic and inelastic (i.e., Raman) scattering are simultaneously enhanced by a given "hot spot", and thus, the surface-enhanced elastic scattering signal provides a localized intrinsic internal standard that scales across all of the plasmon-enhanced electromagnetic fields within a substrate. Elastically scattered light originates from the amplified spontaneous emission (ASE) of the commercial laser, leading to the formation of a low-wavenumber pseudo band that arises from the interaction of the ASE and the edge filter. A theoretical model was developed to illustrate the underlying mechanism supporting this normalization approach. The normalized Raman signals are independent of the incident laser intensity and the density of "hot spots" for numerous SERS substrates. Following "hot-spot" (HS) normalization, the coefficient of variation for the tested SERS substrates decreases from 10 to 60% to 2%-7%. This approach significantly improves SERS quantitation of four chloroanilines and enables collection of highly reproducible analyte adsorption results under both static and dynamic imaging conditions. Overall, this approach provides a simple means to improve SERS reproducibility without the need to use additional chemicals as internal standards.
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Affiliation(s)
- Haoran Wei
- Department
of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia
Tech Institute of Critical Technology and Applied Science (ICTAS)
Sustainable Nanotechnology Center (VTSuN), Blacksburg, Virginia 24061, United States
- Center
for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina 27708, United States
| | - Weinan Leng
- Department
of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia
Tech Institute of Critical Technology and Applied Science (ICTAS)
Sustainable Nanotechnology Center (VTSuN), Blacksburg, Virginia 24061, United States
- Center
for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina 27708, United States
| | - Junyeob Song
- Department
of Electrical and Computer Engineering, Virginia Tech, Blacksburg, Virginia 24060, United States
| | - Marjorie R. Willner
- Department
of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia
Tech Institute of Critical Technology and Applied Science (ICTAS)
Sustainable Nanotechnology Center (VTSuN), Blacksburg, Virginia 24061, United States
- Center
for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina 27708, United States
| | - Linsey C. Marr
- Department
of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia
Tech Institute of Critical Technology and Applied Science (ICTAS)
Sustainable Nanotechnology Center (VTSuN), Blacksburg, Virginia 24061, United States
- Center
for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina 27708, United States
| | - Wei Zhou
- Department
of Electrical and Computer Engineering, Virginia Tech, Blacksburg, Virginia 24060, United States
| | - Peter J. Vikesland
- Department
of Civil and Environmental Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia
Tech Institute of Critical Technology and Applied Science (ICTAS)
Sustainable Nanotechnology Center (VTSuN), Blacksburg, Virginia 24061, United States
- Center
for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina 27708, United States
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18
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Cai YY, Liu JG, Tauzin LJ, Huang D, Sung E, Zhang H, Joplin A, Chang WS, Nordlander P, Link S. Photoluminescence of Gold Nanorods: Purcell Effect Enhanced Emission from Hot Carriers. ACS NANO 2018; 12:976-985. [PMID: 29283248 DOI: 10.1021/acsnano.7b07402] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We demonstrate, experimentally and theoretically, that the photon emission from gold nanorods can be viewed as a Purcell effect enhanced radiative recombination of hot carriers. By correlating the single-particle photoluminescence spectra and quantum yields of gold nanorods measured for five different excitation wavelengths and varied excitation powers, we illustrate the effects of hot carrier distributions evolving through interband and intraband transitions and the photonic density of states on the nanorod photoluminescence. Our model, using only one fixed input parameter, describes quantitatively both emission from interband recombination and the main photoluminescence peak coinciding with the longitudinal surface plasmon resonance.
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Affiliation(s)
- Yi-Yu Cai
- Department of Chemistry, ‡Department of Physics and Astronomy, §Department of Electrical and Computer Engineering, ⊥Department of Materials Science and NanoEngineering, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Jun G Liu
- Department of Chemistry, ‡Department of Physics and Astronomy, §Department of Electrical and Computer Engineering, ⊥Department of Materials Science and NanoEngineering, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Lawrence J Tauzin
- Department of Chemistry, ‡Department of Physics and Astronomy, §Department of Electrical and Computer Engineering, ⊥Department of Materials Science and NanoEngineering, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Da Huang
- Department of Chemistry, ‡Department of Physics and Astronomy, §Department of Electrical and Computer Engineering, ⊥Department of Materials Science and NanoEngineering, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Eric Sung
- Department of Chemistry, ‡Department of Physics and Astronomy, §Department of Electrical and Computer Engineering, ⊥Department of Materials Science and NanoEngineering, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Hui Zhang
- Department of Chemistry, ‡Department of Physics and Astronomy, §Department of Electrical and Computer Engineering, ⊥Department of Materials Science and NanoEngineering, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Anneli Joplin
- Department of Chemistry, ‡Department of Physics and Astronomy, §Department of Electrical and Computer Engineering, ⊥Department of Materials Science and NanoEngineering, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Wei-Shun Chang
- Department of Chemistry, ‡Department of Physics and Astronomy, §Department of Electrical and Computer Engineering, ⊥Department of Materials Science and NanoEngineering, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Peter Nordlander
- Department of Chemistry, ‡Department of Physics and Astronomy, §Department of Electrical and Computer Engineering, ⊥Department of Materials Science and NanoEngineering, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Stephan Link
- Department of Chemistry, ‡Department of Physics and Astronomy, §Department of Electrical and Computer Engineering, ⊥Department of Materials Science and NanoEngineering, and ∥Laboratory for Nanophotonics, Rice University , 6100 Main Street, Houston, Texas 77005, United States
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19
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Vidal C, Sivun D, Ziegler J, Wang D, Schaaf P, Hrelescu C, Klar TA. Plasmonic Horizon in Gold Nanosponges. NANO LETTERS 2018; 18:1269-1273. [PMID: 29337572 DOI: 10.1021/acs.nanolett.7b04875] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An electromagnetic wave impinging on a gold nanosponge coherently excites many electromagnetic hot-spots inside the nanosponge, yielding a polarization-dependent scattering spectrum. In contrast, a hole, recombining with an electron, can locally excite plasmonic hot-spots only within a horizon given by the lifetime of localized plasmons and the speed carrying the information that a plasmon has been created. This horizon is about 57 nm, decreasing with increasing size of the nanosponge. Consequently, photoluminescence from large gold nanosponges appears unpolarized.
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Affiliation(s)
- Cynthia Vidal
- Institute of Applied Physics, Johannes Kepler University Linz , 4040 Linz, Austria
| | - Dmitry Sivun
- Institute of Applied Physics, Johannes Kepler University Linz , 4040 Linz, Austria
| | - Johannes Ziegler
- Institute of Applied Physics, Johannes Kepler University Linz , 4040 Linz, Austria
| | - Dong Wang
- Institute of Materials Engineering and Institute of Micro- and Nanotechnologies MacroNano, Technische Universität Ilmenau , 98693 Ilmenau, Germany
| | - Peter Schaaf
- Institute of Materials Engineering and Institute of Micro- and Nanotechnologies MacroNano, Technische Universität Ilmenau , 98693 Ilmenau, Germany
| | - Calin Hrelescu
- Institute of Applied Physics, Johannes Kepler University Linz , 4040 Linz, Austria
| | - Thomas A Klar
- Institute of Applied Physics, Johannes Kepler University Linz , 4040 Linz, Austria
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20
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Near-infrared photoluminescence biosensing platform with gold nanorods-over-gallium arsenide nanohorn array. Biosens Bioelectron 2017; 97:278-284. [DOI: 10.1016/j.bios.2017.06.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 05/24/2017] [Accepted: 06/06/2017] [Indexed: 12/12/2022]
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21
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Li C, Ding L, Liang C, Zhang J, Zhang C, Mei H, Wang C, Wu W, Zhang J, Xu W. Photon-Induced Light Emission from Foamed Gold with Micro/Nanohollow Sphere Structures. ACS OMEGA 2017; 2:5759-5765. [PMID: 31457834 PMCID: PMC6644791 DOI: 10.1021/acsomega.7b00798] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 08/29/2017] [Indexed: 05/30/2023]
Abstract
We present a study on photon-induced light emission at room temperature from macroscale foamed gold with micro/nanoscale hollow spheres synthesized by seed-mediated growth method. Samples with a fixed sphere diameter but different Au densities are examined. It is demonstrated that strong and characteristic light emission from these samples can be achieved under optical excitation. In a short excitation wavelength regime (280-470 nm), the peak position in the photoemission spectrum increases almost linearly with excitation wavelength. In a relatively long-wavelength excitation regime (478-520 nm), photoluminescence (PL) can be observed where the peak position in the PL spectrum depends very little on excitation wavelength and two peaks can be seen in the PL emission spectrum. These effects do not change significantly with varying sample density, although it is found that the intensity of the light emission increases with sample density. We find that the features of the PL emission from foamed gold with micro/nanoscale hollow spheres differ significantly from those observed for Au nanoparticles. This study is relevant to the application of Au micro/nanostructures as advanced optoelectronic materials and devices.
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Affiliation(s)
- Chaojian Li
- School
of Physics and Astronomy, International Joint Research Center for
Optoelectronic and Energy Materials, and Yunnan Key Laboratory for
Micro/Nano Materials and Technology, Yunnan
University, 2 Cuihu North
Road, Kunming 650091, China
| | - Lan Ding
- School
of Physics and Astronomy, International Joint Research Center for
Optoelectronic and Energy Materials, and Yunnan Key Laboratory for
Micro/Nano Materials and Technology, Yunnan
University, 2 Cuihu North
Road, Kunming 650091, China
| | - Changneng Liang
- School
of Physics and Astronomy, International Joint Research Center for
Optoelectronic and Energy Materials, and Yunnan Key Laboratory for
Micro/Nano Materials and Technology, Yunnan
University, 2 Cuihu North
Road, Kunming 650091, China
| | - Jie Zhang
- School
of Physics and Astronomy, International Joint Research Center for
Optoelectronic and Energy Materials, and Yunnan Key Laboratory for
Micro/Nano Materials and Technology, Yunnan
University, 2 Cuihu North
Road, Kunming 650091, China
| | - Chao Zhang
- Key
Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, 350 Shushanhu Road, Hefei 230031, China
| | - Hongying Mei
- Key
Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, 350 Shushanhu Road, Hefei 230031, China
| | - Chao Wang
- Key
Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, 350 Shushanhu Road, Hefei 230031, China
| | - Weidong Wu
- Research
Center of Laser Fusion, Chinese Academy
of Engineering Physics, 64 Mianshan Road, Mianyang 621900, China
| | - Jin Zhang
- School
of Physics and Astronomy, International Joint Research Center for
Optoelectronic and Energy Materials, and Yunnan Key Laboratory for
Micro/Nano Materials and Technology, Yunnan
University, 2 Cuihu North
Road, Kunming 650091, China
| | - Wen Xu
- School
of Physics and Astronomy, International Joint Research Center for
Optoelectronic and Energy Materials, and Yunnan Key Laboratory for
Micro/Nano Materials and Technology, Yunnan
University, 2 Cuihu North
Road, Kunming 650091, China
- Key
Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, 350 Shushanhu Road, Hefei 230031, China
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22
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Park JE, Kim J, Nam JM. Emerging plasmonic nanostructures for controlling and enhancing photoluminescence. Chem Sci 2017; 8:4696-4704. [PMID: 28936337 PMCID: PMC5596414 DOI: 10.1039/c7sc01441d] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 05/30/2017] [Indexed: 11/25/2022] Open
Abstract
Localised surface plasmon resonance endows plasmonic nanostructures with unique, powerful properties such as photoluminescence enhancement, which is a phenomenon based on the interaction between light and a metal nanostructure. In particular, photoluminescence modulation and enhancement are of importance to many research fields such as photonics, plasmonics and biosensing. In this minireview, we introduce basic principles of plasmonic-nanostructure photoluminescence and recently reported plasmonic nanostructures exhibiting surface-enhanced fluorescence and direct photoluminescence, with one-photon photoluminescence being of particular interest. Gaining insights into these systems not only helps understand the fundamental concepts of plasmonic nanostructures but also advances and extends their applications.
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Affiliation(s)
- Jeong-Eun Park
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea .
| | - Jiyeon Kim
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea .
| | - Jwa-Min Nam
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea .
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23
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Nguyen MK, Su WN, Hwang BJ. A Plasmonic Coupling Substrate Based on Sandwich Structure of Ultrathin Silica-Coated Silver Nanocubes and Flower-Like Alumina-Coated Etched Aluminum for Sensitive Detection of Biomarkers in Urine. Adv Healthc Mater 2017; 6. [PMID: 28152271 DOI: 10.1002/adhm.201601290] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 01/10/2017] [Indexed: 11/08/2022]
Abstract
Interactions between substrate and plasmonic nanostructures can give rise to unique optical properties and influence performance in plasmonic biosensing applications. In this study, a substrate with low refractive index and roughness based on flower-like alumina-coated etched aluminum foil (f-Al2 O3 /e-Al) has been fabricated. Silver@silica (Ag@SiO2 ) nanocubes (NCs) assemble in an edge-edge configuration when deposited on this substrate. The rough surface texture of f-Al2 O3 /e-Al provides a pathway for coupling of incident light to surface plasmons. The Ag@SiO2 /f-Al2 O3 /e-Al substrate exhibits a coupling efficiency of laser light sources into surface plasmon hotspots for both surface-enhanced Raman scattering (SERS) and metal-enhanced photoluminescence (MEPL). Moreover, the shelf life of this substrate is significantly improved due to a reduction in oxygen diffusion rate mediated by the ultrathin silica spacer and the flower-like Al2 O3 dielectric layer. Creatinine and flavin adenine dinucleotide are biomolecules present in human blood and urine. With advanced label-free SERS and MEPL techniques, it is possible to detect these biomarkers in urine, allowing cheap, noninvasive, yet sensitive analysis. The approach explored in this work can be developed into a powerful encoding tool for high-throughput bioanalysis.
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Affiliation(s)
- Minh-Kha Nguyen
- Department of Chemical Engineering; National Taiwan University of Science and Technology; Taipei 106 Taiwan
| | - Wei-Nien Su
- Graduate Institute of Applied Science and Technology; National Taiwan University of Science and Technology; Taipei 106 Taiwan
| | - Bing-Joe Hwang
- Department of Chemical Engineering; National Taiwan University of Science and Technology; Taipei 106 Taiwan
- National Synchrotron Radiation Research Center; Hsin-Chu 300 Taiwan
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24
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Esfahani MR, Pallem VL, Stretz HA, Wells MJM. Extinction, emission, and scattering spectroscopy of 5-50 nm citrate-coated gold nanoparticles: An argument for curvature effects on aggregation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 175:100-109. [PMID: 28024243 DOI: 10.1016/j.saa.2016.11.052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/11/2016] [Accepted: 11/30/2016] [Indexed: 05/11/2023]
Abstract
The interaction of macromolecules with gold nanoparticles (GNPs) is of interest in the emerging field of biomedical and environmental detection devices. However, the physicochemical properties, including spectra, of GNPs in aqueous solution in the absence of metal-macromolecular interactions must first be considered before their activity in biological and environmental systems can be understood. The specific objective of this research was to experimentally illuminate the role of nanoparticle core size on the spectral (simultaneous consideration of extinction, emission, and scattering) versus aggregation behaviors of citrate-coated GNPs (CT-GNPs). It is difficult to find in the literature systematic simultaneous presentation of scattering, emission, and extinction spectra, including the UV range, and thus the present work will aid those who would use such particles for spectroscopic related separations or sensors. The spectroscopic behavior of CT-GNPs with different core sizes (5, 10, 30, and 50nm) was studied in ultra-pure water at pH6.0-6.5 employing UV-visible extinction, excitation-emission matrix (EEM), resonance Rayleigh scattering, and dynamic light scattering (DLS) spectroscopies. The CT-GNP-5 and CT-GNP-10 samples aggregated, absorbed light, and emitted light. In contrast, the CT-GNP-30 and CT-GNP-50 samples did not aggregate and did not emit light, but scattered light intensely. Multimodal peaks were observed in the intensity-based DLS spectra of CT-GNP-5 and CT-GNP-10 samples. Monomodal peaks in the volume-based DLS spectra overestimated particle diameters by 60% and 30% for the CT-GNP-5 and CT-GNP-10 samples, respectively, but underestimated diameters by 10% and 4% for the CT-GNP-30 and CT-GNP-50 samples. The volume-based DLS spectra indicated that dimer and trimer aggregates contributed most to the overall volume of particles in the 5- and 10-nm CT-GNPs, whereas the CT-GNP-30 and CT-GNP-50 samples did not aggregate. Here, we discuss the potential influence that differences in preparation, ionic strength, zeta potential, and conformation of adsorbed citrate anions (due to surface curvature of corona) may exert on the aggregation and spectral observations in these data. In particular, the severe surface curvature of the 5- and 10-nm GNP corona may affect the efficiency of the di-/tribasic citrate compatiblizer molecule to shield the core from interactions with light and from GNP-GNP homoaggregation.
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Affiliation(s)
- Milad Rabbani Esfahani
- Center for the Management, Utilization and Protection of Water Resources, Tennessee Technological University, Cookeville, TN 38505, United States; Department of Chemical Engineering, Tennessee Technological University, Cookeville, TN 38505, United States
| | - Vasanta L Pallem
- Center for the Management, Utilization and Protection of Water Resources, Tennessee Technological University, Cookeville, TN 38505, United States; Department of Chemical Engineering, Tennessee Technological University, Cookeville, TN 38505, United States
| | - Holly A Stretz
- Department of Chemical Engineering, Tennessee Technological University, Cookeville, TN 38505, United States.
| | - Martha J M Wells
- EnviroChem Services, 224 Windsor Drive, Cookeville, TN 38506, United States.
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25
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Yin T, Jiang L, Dong Z, Yang JKW, Shen ZX. Energy transfer and depolarization in the photoluminescence of a plasmonic molecule. NANOSCALE 2017; 9:2082-2087. [PMID: 28116398 DOI: 10.1039/c6nr07946f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report a comprehensive experimental study of the polarization dependence between excitation and photoluminescence (PL) emission from single dolmen-like metallic nanostructures that exhibit both Fano-like and Lorentz-like plasmon resonances. Though the PL spectra of this plasmonic "molecule" also exhibit the Fano and Lorentz signature, the emitted photons do not maintain the same polarization as the excitation. Surprisingly, the degree of depolarization correlates closely to the resonant excitation of the constituent atoms (single nanorod). More specifically, the excitation of a transverse plasmon mode results in a depolarized emission through the longitudinal plasmon modes of the constituent nanorods. In view of the recent evidence of on-resonant plasmon induced excitations in generating hot electrons, our results suggest that depolarized PL emissions could be enhanced through hot-electron decay. Both macroscopic and microscopic mechanisms are proposed to well-understand the excitation wavelength dependent depolarized photoluminescence behaviors in the plasmonic molecule. Our results lay a foundation for applying the depolarized photoluminescence of complex plasmonic nanostructures in polarization engineering.
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Affiliation(s)
- Tingting Yin
- Centre for Disruptive Photonic Technologies (CDPT), School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
| | - Liyong Jiang
- Centre for Disruptive Photonic Technologies (CDPT), School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore. and Nanophotonic Laboratory, Department of Physics, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Zhaogang Dong
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore
| | - Joel K W Yang
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore and Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Singapore
| | - Ze Xiang Shen
- Centre for Disruptive Photonic Technologies (CDPT), School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
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26
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Sivun D, Vidal C, Munkhbat B, Arnold N, Klar TA, Hrelescu C. Anticorrelation of Photoluminescence from Gold Nanoparticle Dimers with Hot-Spot Intensity. NANO LETTERS 2016; 16:7203-7209. [PMID: 27700125 PMCID: PMC5108029 DOI: 10.1021/acs.nanolett.6b03562] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 10/01/2016] [Indexed: 05/28/2023]
Abstract
Bulk gold shows photoluminescence (PL) with a negligible quantum yield of ∼10-10, which can be increased by orders of magnitude in the case of gold nanoparticles. This bears huge potential to use noble metal nanoparticles as fluorescent and unbleachable stains in bioimaging or for optical data storage. Commonly, the enhancement of the PL yield is attributed to nanoparticle plasmons, specifically to the enhancements of scattering or absorption cross sections. Tuning the shape or geometry of gold nanostructures (e.g., via reducing the distance between two nanoparticles) allows for redshifting both the scattering and the PL spectra. However, while the scattering cross section increases with a plasmonic redshift, the PL yield decreases, indicating that the common simple picture of a plasmonically boosted gold luminescence needs more detailed consideration. In particular, precise experiments as well as numerical simulations are required. Hence, we systematically varied the distance between the tips of two gold bipyramids on the nanometer scale using AFM manipulation and recorded the PL and the scattering spectra for each separation. We find that the PL intensity decreases as the interparticle coupling increases. This anticorrelation is explained by a theoretical model where both the gold-intrinsic d-band hole recombination probabilities as well as the field strength inside the nanostructure are considered. The scattering cross section or the field strength in the hot-spot between the tips of the bipyramids are not relevant for the PL intensity. Besides, we not only observe PL supported by dipolar plasmon resonances, but also measure and simulate PL supported by higher order plasmonic modes.
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Affiliation(s)
- Dmitry Sivun
- Institute of Applied Physics, Johannes Kepler University Linz, 4040 Linz, Austria
| | - Cynthia Vidal
- Institute of Applied Physics, Johannes Kepler University Linz, 4040 Linz, Austria
| | - Battulga Munkhbat
- Institute of Applied Physics, Johannes Kepler University Linz, 4040 Linz, Austria
| | - Nikita Arnold
- Institute of Applied Physics, Johannes Kepler University Linz, 4040 Linz, Austria
| | - Thomas A. Klar
- Institute of Applied Physics, Johannes Kepler University Linz, 4040 Linz, Austria
| | - Calin Hrelescu
- Institute of Applied Physics, Johannes Kepler University Linz, 4040 Linz, Austria
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27
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Li S, Zhang T, Zhu Z, Gao N, Xu QH. Lighting up the gold nanoparticles quenched fluorescence by silver nanoparticles: a separation distance study. RSC Adv 2016. [DOI: 10.1039/c6ra11265j] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Fluorescence intensity of a pre-quenched fluorophore was enhanced by over 100-fold through plasmon coupling interactions, even brighter than unquenched ones.
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Affiliation(s)
- Shuang Li
- Department of Chemistry
- National University of Singapore
- Republic of Singapore 117543
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
| | - Taishi Zhang
- Department of Chemistry
- National University of Singapore
- Republic of Singapore 117543
- NUS Graduate School for Integrative Sciences and Engineering
- National University of Singapore
| | - Zhijun Zhu
- Department of Chemistry
- National University of Singapore
- Republic of Singapore 117543
| | - Nengyue Gao
- Department of Chemistry
- National University of Singapore
- Republic of Singapore 117543
| | - Qing-Hua Xu
- Department of Chemistry
- National University of Singapore
- Republic of Singapore 117543
- NUS Graduate School for Integrative Sciences and Engineering
- National University of Singapore
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28
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Viarbitskaya S, Demichel O, Cluzel B, Colas des Francs G, Bouhelier A. Delocalization of Nonlinear Optical Responses in Plasmonic Nanoantennas. PHYSICAL REVIEW LETTERS 2015; 115:197401. [PMID: 26588413 DOI: 10.1103/physrevlett.115.197401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Indexed: 06/05/2023]
Abstract
Remote excitation and emission of two-photon luminescence and second-harmonic generation are observed in micrometer long gold rod optical antennas upon local illumination with a tightly focused near-infrared femtosecond laser beam. We show that these nonlinear radiations are emitted from the entire antenna and the measured far-field angular patterns bear the information regarding the nature and origins of the respective nonlinear processes. We demonstrate that the nonlinear responses are locally induced by a propagating surface plasmon at the excitation frequency, enabling thereby a polariton-mediated spatial tailoring and design of coherent and incoherent nonlinear responses.
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Affiliation(s)
- Sviatlana Viarbitskaya
- Laboratoire Interdisciplinaire Carnot de Bourgogne CNRS-UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France
| | - Olivier Demichel
- Laboratoire Interdisciplinaire Carnot de Bourgogne CNRS-UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France
| | - Benoit Cluzel
- Laboratoire Interdisciplinaire Carnot de Bourgogne CNRS-UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France
| | - Gérard Colas des Francs
- Laboratoire Interdisciplinaire Carnot de Bourgogne CNRS-UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France
| | - Alexandre Bouhelier
- Laboratoire Interdisciplinaire Carnot de Bourgogne CNRS-UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France
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29
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Meixner AJ, Jäger R, Jäger S, Bräuer A, Scherzinger K, Fulmes J, Krockhaus SZO, Gollmer DA, Kern DP, Fleischer M. Coupling single quantum dots to plasmonic nanocones: optical properties. Faraday Discuss 2015; 184:321-37. [PMID: 26404008 DOI: 10.1039/c5fd00074b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Coupling a single quantum emitter, such as a fluorescent molecule or a quantum dot (QD), to a plasmonic nanostructure is an important issue in nano-optics and nano-spectroscopy, relevant for a wide range of applications, including tip-enhanced near-field optical microscopy, plasmon enhanced molecular sensing and spectroscopy, and nanophotonic amplifiers or nanolasers, to mention only a few. While the field enhancement of a sharp nanoantenna increasing the excitation rate of a very closely positioned single molecule or QD has been well investigated, the detailed physical mechanisms involved in the emission of a photon from such a system are, by far, less investigated. In one of our ongoing research projects, we try to address these issues by constructing and spectroscopically analysing geometrically simple hybrid heterostructures consisting of sharp gold cones with single quantum dots attached to the very tip apex. An important goal of this work is to tune the longitudinal plasmon resonance by adjusting the cones' geometry to the emission maximum of the core-shell CdSe/ZnS QDs at nominally 650 nm. Luminescence spectra of the bare cones, pure QDs and hybrid systems were distinguished successfully. In the next steps we will further investigate, experimentally and theoretically, the optical properties of the coupled systems in more detail, such as the fluorescence spectra, blinking statistics, and the current results on the fluorescence lifetimes, and compare them with uncoupled QDs to obtain a clearer picture of the radiative and non-radiative processes.
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Affiliation(s)
- Alfred J Meixner
- Center for Light-Matter Interaction, Sensors & Analytics (LISA+), Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
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30
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Tailoring Plasmonic Enhanced Upconversion in Single NaYF4:Yb(3+)/Er(3+) Nanocrystals. Sci Rep 2015; 5:10196. [PMID: 25976870 PMCID: PMC4432370 DOI: 10.1038/srep10196] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 04/01/2015] [Indexed: 11/09/2022] Open
Abstract
By using silver nanoplatelets with a widely tunable localized surface plasmon resonance (LSPR), and their corresponding local field enhancement, here we show large manipulation of plasmonic enhanced upconversion in NaYF4:Yb(3+)/Er(3+) nanocrystals at the single particle level. In particular, we show that when the plasmonic resonance of silver nanolplatelets is tuned to 656 nm, matching the emission wavelength, an upconversion enhancement factor ~5 is obtained. However, when the plasmonic resonance is tuned to 980 nm, matching the nanocrystal absorption wavelength, we achieve an enhancement factor of ~22 folds. The precise geometric arrangement between fluorescent nanoparticles and silver nanoplatelets allows us to make, for the first time, a comparative analysis between experimental results and numerical simulations, yielding a quantitative agreement at the single particle level. Such a comparison lays the foundations for a rational design of hybrid metal-fluorescent nanocrystals to harness the upconversion enhancement for biosensing and light harvesting applications.
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31
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Melentiev PN, Afanasiev AE, Kuzin AA, Zablotskiy AV, Balykin VI. Giant enhancement of two photon induced luminescence in metal nanostructure. OPTICS EXPRESS 2015; 23:11444-11452. [PMID: 25969239 DOI: 10.1364/oe.23.011444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We experimentally demonstrate a drastic increase in the rate of radiative process of a nanoscale physical system with implementation of the three physical effects: (1) the size effect, (2) plasmon resonance and (3) the optical Tamm state. As an example of a nanoscale physical system, we choose a single nanohole in Au film when the nanohole is embedded in a photonic crystal of a specific type that maintains an optical Tamm state and as a radiative process - a nonlinear photoluminescence. The efficiency of the nonlinear photoluminescence is increased by more than 10(7) times in compare to a bulk material.
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32
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Yoon HJ, Lee ES, Kang M, Jeong Y, Park JH. In vivo multi-photon luminescence imaging of cerebral vasculature and blood-brain barrier integrity using gold nanoparticles. J Mater Chem B 2015; 3:2935-2938. [PMID: 32262492 DOI: 10.1039/c4tb01759e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We report that time-dependent morphological changes of cortical vasculature, which would be associated with blood-brain barrier disruption, can be clearly visualized with high spatial resolution in a stroke mouse model using the multi-photon luminescence of long-circulating gold nanoparticles.
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Affiliation(s)
- Hwan-Jun Yoon
- Department of Bio and Brain Engineering, KAIST, Daejeon, South Korea.
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33
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Ngoc LLT, Wiedemair J, van den Berg A, Carlen ET. Plasmon-modulated photoluminescence from gold nanostructures and its dependence on plasmon resonance, excitation energy, and band structure. OPTICS EXPRESS 2015; 23:5547-5564. [PMID: 25836787 DOI: 10.1364/oe.23.005547] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Two distinct single-photon plasmon-modulated photo-luminescence processes are generated from nanostructured gold surfaces by tuning the spectral overlap of the incident laser source, localized surface plasmon resonance band, and the interband transitions between the d and sp bands, near the X- and L-symmetry points of the electronic band structure of gold. In the main section of the article, the characteristics of these photoluminescence processes are described and discussed. In the last section, the background continuum accompanying surface-enhanced Raman scattering (SERS) spectra from benzenethiol and 4-mercaptopyridine self-assembled monolayers chemisorbed on nanostructured gold surfaces is shown to originate from plasmon-modulated photoluminescence.
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34
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Zhao B, Jiang MM, Zhao DX, Li Y, Wang F, Shen DZ. Electrically driven plasmon mediated energy transfer between ZnO microwires and Au nanoparticles. NANOSCALE 2015; 7:1081-1089. [PMID: 25476913 DOI: 10.1039/c4nr05369a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Electrically driven energy transfer between the surface defect states of ZnO quadrilateral microwires (MWs) and localized surface plasmon polaritons has been realized by means of introducing Au nanoparticles (NPs). An electroluminescence device with green emission using ZnO quadrilateral MWs, was fabricated. Once the Au NPs are sputtered on the surfaces of the ZnO MWs, the electroluminescence of the ZnO MWs will shift from green to red. Meanwhile, dual emissions were observed by means of sputtering Au NPs on a single ZnO MW periodically. Due to the Au NPs, electrically driven plasmon mediated energy transfer can achieve the modulation of amplifying, or quenching the surface defect emission. The relevant dynamic process of the surface plasmon mode mediated energy transfer was investigated. This new energy transfer method potentially offers an approach of modification and recombination of the surface defect state excitations of wide bandgap semiconductor materials.
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Affiliation(s)
- Bin Zhao
- State key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun, 130033, People's Republic of China
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35
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He Y, Xia K, Lu G, Shen H, Cheng Y, Liu YC, Shi K, Xiao YF, Gong Q. Surface enhanced anti-Stokes one-photon luminescence from single gold nanorods. NANOSCALE 2015; 7:577-582. [PMID: 25418974 DOI: 10.1039/c4nr04879b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Anti-Stokes one-photon luminescence from a single gold nanorod is experimentally investigated. The anti-Stokes emission of gold nanorods is enhanced and strongly modulated by localized surface plasmon resonance (LSPR). It is found that the polarization dependence of the anti-Stokes emission is in strong correlation with that of the Stokes emission. Further experiments provide evidence that LSPR significantly enhanced both excitation and emission processes. Moreover, the line shape of the anti-Stokes emission is dependent on the surface temperature, which is related to the distribution of free electrons near the Fermi level. This discovery provides an effective method in principle to probe localized temperature at nanoscale dimension. Here, the reported results about the anti-Stokes emission provide more understanding for the photoemission process from the plasmonic nanostructures.
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Affiliation(s)
- Yingbo He
- State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China.
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36
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Hu W, Ning Y, Kong J, Zhang X. Formation of copper nanoparticles on poly(thymine) through surface-initiated enzymatic polymerization and its application for DNA detection. Analyst 2015; 140:5678-84. [DOI: 10.1039/c5an01109d] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A DNA biosensor using polyT-templated CuNPs as the fluorescent probe and SIEP as the signal amplification strategy is proposed.
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Affiliation(s)
- Weiwen Hu
- School of Environmental and Biological Engineering
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
| | - Yong Ning
- School of Laboratory Medicine
- Hubei University of Chinese Medicine
- Wuhan 430065
- P. R. China
| | - Jinming Kong
- School of Environmental and Biological Engineering
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
| | - Xueji Zhang
- School of Environmental and Biological Engineering
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
- Chemistry Department
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37
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Zhang T, Lu G, Shen H, Shi K, Jiang Y, Xu D, Gong Q. Photoluminescence of a single complex plasmonic nanoparticle. Sci Rep 2014; 4:3867. [PMID: 24463794 PMCID: PMC3902388 DOI: 10.1038/srep03867] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Accepted: 01/08/2014] [Indexed: 12/02/2022] Open
Abstract
We report detailed investigations of the photoluminescence (PL) generated from an individual gold nanoflower, a highly branched plasmonic nanoparticle. Compared to nanostructures with simple shapes, such as spheres, nanorods, and bipyramids, nanoflowers exhibit more distinct features, i.e., the PL spectra and far-field emission patterns are strongly dependent on the wavelength and polarization of the excitation light. The experimental results are qualitatively explained using theoretical calculations. In addition, the intrinsic PL signal is highly dominated by localized surface plasmon resonances. The crucial role of plasmonic coupling in complex nanostructures during the plasmon-enhanced PL process is highlighted. The findings contribute to a deeper understanding of the PL properties of metallic nanoparticles. This study will be beneficial for several potential applications, including optical imaging and sensing in the fields of materials science and biology.
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Affiliation(s)
- Tianyue Zhang
- State Key Laboratory for Mesoscopic Physics, Department of Physics, Beijing 100871, China
| | - Guowei Lu
- State Key Laboratory for Mesoscopic Physics, Department of Physics, Beijing 100871, China
| | - Hongming Shen
- State Key Laboratory for Mesoscopic Physics, Department of Physics, Beijing 100871, China
| | - Kebin Shi
- State Key Laboratory for Mesoscopic Physics, Department of Physics, Beijing 100871, China
| | - Yuanyuan Jiang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Dongsheng Xu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Qihuang Gong
- State Key Laboratory for Mesoscopic Physics, Department of Physics, Beijing 100871, China
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38
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Resonant secondary light emission from plasmonic Au nanostructures at high electron temperatures created by pulsed-laser excitation. Proc Natl Acad Sci U S A 2014; 111:906-11. [PMID: 24395798 DOI: 10.1073/pnas.1311477111] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Plasmonic nanostructures are of great current interest as chemical sensors, in vivo imaging agents, and for photothermal therapeutics. We study continuous-wave (cw) and pulsed-laser excitation of aqueous suspensions of Au nanorods as a model system for secondary light emission from plasmonic nanostructures. Resonant secondary emission contributes significantly to the background commonly observed in surface-enhanced Raman scattering and to the light emission generated by pulsed-laser excitation of metallic nanostructures that is often attributed to two-photon luminescence. Spectra collected using cw laser excitation at 488 nm show an enhancement of the broad spectrum of emission at the electromagnetic plasmon resonance of the nanorods. The intensity of anti-Stokes emission collected using cw laser excitation at 785 nm is described by a 300 K thermal distribution of excitations. Excitation by subpicosecond laser pulses at 785 nm broadens and increases the intensity of the anti-Stokes emission in a manner that is consistent with electronic Raman scattering by a high-temperature distribution of electronic excitations predicted by a two-temperature model. Broadening of the pulse duration using an etalon reduces the intensity of anti-Stokes emission in quantitative agreement with the model. Experiments using a pair of subpicosecond optical pulses separated by a variable delay show that the timescale of resonant secondary emission is comparable to the timescale for equilibration of electrons and phonons.
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39
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Neupane B, Zhao L, Wang G. Up-conversion luminescence of gold nanospheres when excited at nonsurface plasmon resonance wavelength by a continuous wave laser. NANO LETTERS 2013; 13:4087-4092. [PMID: 23914976 DOI: 10.1021/nl401505p] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We show that, when gold nanospheres are excited at the red side of the surface plasmon resonance (SPR) wavelength at 592 nm by a continuous wave (CW) laser, they give substantial up-converted luminescence in the SPR wavelength range. The luminescence intensity scales as a second-order function of the excitation power, with a quantum yield ~1/50 of down-conversion luminescence when illuminated at a power of 30 MW/cm(2). The luminescence spectrum is completely different than the SPR profile, indicating a new emission mechanism possibly involving interband transitions coupled with phonons or localized vibration of neighboring gold atoms. Such luminescence is also observed to be substantial for short gold nanorods with an aspect ratio of ~2 but weak for bulk gold. This study provides new insight to the understanding of gold nanoparticle luminescence and opens a new detection scheme for gold nanoparticle-based biological imaging.
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Affiliation(s)
- Bhanu Neupane
- Chemistry Department, North Carolina State University , Raleigh, North Carolina 27695, United States
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