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Kang Y, Masud MK, Guo Y, Zhao Y, Nishat ZS, Zhao J, Jiang B, Sugahara Y, Pejovic T, Morgan T, Hossain MSA, Li H, Salomon C, Asahi T, Yamauchi Y. Au-Loaded Superparamagnetic Mesoporous Bimetallic CoFeB Nanovehicles for Sensitive Autoantibody Detection. ACS NANO 2023; 17:3346-3357. [PMID: 36744876 DOI: 10.1021/acsnano.2c07694] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Construction of a well-defined mesoporous nanostructure is crucial for applying nonnoble metals in catalysis and biomedicine owing to their highly exposed active sites and accessible surfaces. However, it remains a great challenge to controllably synthesize superparamagnetic CoFe-based mesoporous nanospheres with tunable compositions and exposed large pores, which are sought for immobilization or adsorption of guest molecules for magnetic capture, isolation, preconcentration, and purification. Herein, a facile assembly strategy of a block copolymer was developed to fabricate a mesoporous CoFeB amorphous alloy with abundant metallic Co/Fe atoms, which served as an ideal scaffold for well-dispersed loading of Au nanoparticles (∼3.1 nm) via the galvanic replacement reaction. The prepared Au-CoFeB possessed high saturation magnetization as well as uniform and large open mesopores (∼12.5 nm), which provided ample accessibility to biomolecules, such as nucleic acids, enzymes, proteins, and antibodies. Through this distinctive combination of superparamagnetism (CoFeB) and biofavorability (Au), the resulting Au-CoFeB was employed as a dispersible nanovehicle for the direct capture and isolation of p53 autoantibody from serum samples. Highly sensitive detection of the autoantibody was achieved with a limit of detection of 0.006 U/mL, which was 50 times lower than that of the conventional p53-ELISA kit-based detection system. Our assay is capable of quantifying differential expression patterns for detecting p53 autoantibodies in ovarian cancer patients. This assay provides a rapid, inexpensive, and portable platform with the potential to detect a wide range of clinically relevant protein biomarkers.
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Affiliation(s)
- Yunqing Kang
- Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
- JST-ERATO Yamauchi Materials Space-Tectonics Project, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- JST-ERATO Yamauchi Materials Space-Tectonics Project, Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku, Tokyo 169-0051, Japan
| | - Mostafa Kamal Masud
- JST-ERATO Yamauchi Materials Space-Tectonics Project, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yanna Guo
- Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
- JST-ERATO Yamauchi Materials Space-Tectonics Project, Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku, Tokyo 169-0051, Japan
| | - Yingji Zhao
- Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
| | - Zakia Sultana Nishat
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh
| | - Jingjing Zhao
- The Education Ministry Key Lab of Resource Chemistry and Joint International Research Laboratory of Resource Chemistry, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China
| | - Bo Jiang
- The Education Ministry Key Lab of Resource Chemistry and Joint International Research Laboratory of Resource Chemistry, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China
| | - Yoshiyuki Sugahara
- Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
- JST-ERATO Yamauchi Materials Space-Tectonics Project, Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku, Tokyo 169-0051, Japan
| | - Tanja Pejovic
- Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, Oregon 97239, United States
| | - Terry Morgan
- Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, Oregon 97239, United States
| | | | - Hexing Li
- The Education Ministry Key Lab of Resource Chemistry and Joint International Research Laboratory of Resource Chemistry, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China
| | - Carlos Salomon
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, University of Queensland Centre for Clinical Research, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD 4029, Australia
| | - Toru Asahi
- Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
- JST-ERATO Yamauchi Materials Space-Tectonics Project, Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku, Tokyo 169-0051, Japan
| | - Yusuke Yamauchi
- JST-ERATO Yamauchi Materials Space-Tectonics Project, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Khurshid H, Yoosuf R, Zafar H, Attanayake SB, Azeem M, Issa BA, Anjum DH, Srikanth H. From multi-segmented to core/shell nanorods: morphology evolution in Fe-Au nanorods by tuning fabrication conditions. NANOTECHNOLOGY 2023; 34:185602. [PMID: 36716488 DOI: 10.1088/1361-6528/acb715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Aiming to obtain hybrid magneto-plasmonic nanostructures, we have developed multisegmented and core/shell structured Fe-Au nanorods using template assisted electrochemical deposition. A facile method of tuning the growth pattern of multisegmented nanorods into core/shell structured is demonstrated. With a precise control of current density and deposition time, a brick-stacked wire like growth led to the formation of hollow nanotubes that could be further tuned to multilayered hollow nanotubes and core/shell structured nanorods. TEM imaging and STEM-EELS technique were used to explore the morphology, microstructure and the distribution of Au and Fe in the nanorods. The easy magnetization direction was found to be perpendicular to the nanorods' growth direction in the segmented nanorods. On the other hand, core/shell nanorods exhibited isotropic behavior. Our findings provide deeper insights into the fabrication of hybrid nanorods and the opportunity to tune the fabrication method to vary their morphology accordingly. Such studies will benefit design of hybrid nanorods with specific morphologies and physical properties and hence their integration into sensing, spintronics and other potential biomedical and technological applications.
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Affiliation(s)
- Hafsa Khurshid
- Department of Applied Physics and Astronomy, University of Sharjah, United Arab Emirates
- Department of Medical Diagnostic Imaging, University of Sharjah, United Arab Emirates
| | - Rahana Yoosuf
- Department of Applied Physics and Astronomy, University of Sharjah, United Arab Emirates
| | - Humaira Zafar
- Department of Physics, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Supun B Attanayake
- Department of Physics, University of South Florida, Tampa FL, United States of America
| | - Muhammad Azeem
- Department of Applied Physics and Astronomy, University of Sharjah, United Arab Emirates
| | - Bashar A Issa
- Department of Medical Diagnostic Imaging, University of Sharjah, United Arab Emirates
| | - Dalaver H Anjum
- Department of Physics, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Hariharan Srikanth
- Department of Physics, University of South Florida, Tampa FL, United States of America
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Tufa LT, Tran VT, Jeong KJ, Gicha BB, Gonfa BA, Lee J. Electrochemical Investigation of Porosity in Core-Shell Magnetoplasmonic Nanoparticles. J Phys Chem Lett 2022; 13:6085-6092. [PMID: 35759217 DOI: 10.1021/acs.jpclett.2c01201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Porous core-shell nanoparticles (NPs) have emerged as a promising material for broad ranges of applications in catalysts, material chemistry, biology, and optical sensors. Using a typical Ag core-Fe3O4 shell NP, a.k.a., magnetoplasmonic (MagPlas) NP, two porous shell models were prepared: i.e., Ag@Fe3O4 NPs and its SiO2-covered NPs (Ag@Fe3O4@SiO2). We suggested using cyclic voltammetry (CV) to provide unprecedented insight into the porosity of the core-shell NPs caused by the applied potential, resulting in the selective redox activities of the core and porous shell components of Ag@Fe3O4 NPs and Ag@Fe3O4@SiO2 NPs at different cycles of CV. The porous and nonporous core-shell nanostructures were qualitatively and quantitatively determined by the electrochemical method. The ratio of the oxidation current peak (μA) of Ag to Ag+ in the porous shell to that in the SiO2 coated (nonporous) shell was 400:3.2. The suggested approach and theoretical background could be extended to other types of multicomponent NP complexes.
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Affiliation(s)
- Lemma Teshome Tufa
- Research Institute of Materials Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Applied Chemistry, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia
| | - Van Tan Tran
- Faculty of Biotechnology, Chemistry, and Environmental Engineering, Phenikaa University, Hanoi 10000, Vietnam
| | - Ki-Jae Jeong
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People's Republic of China
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Birhanu Bayissa Gicha
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Environmental Science Program, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia
| | - Bedasa Abdisa Gonfa
- Department of Applied Chemistry, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia
| | - Jaebeom Lee
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Chemistry Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
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Nguyen HQ, Hwang D, Park S, Nguyen MCT, Kang SS, Tran VT, Lee J. One-Pot Synthesis of Magnetoplasmonic Au@Fe xO y Nanowires: Bioinspired Bouligand Chiral Stack. ACS NANO 2022; 16:5795-5806. [PMID: 35311268 DOI: 10.1021/acsnano.1c10904] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
One-dimensional hybrid nanostructures composed of a plasmonic gold nanowire core covered by a shell of magnetic oxide nanoparticles (Au@FexOy NWs) were synthesized by a one-pot solvothermal synthesis process. The effects of reaction temperature, time, reducing agent, and precursor as well as postsynthesis treatment were optimized to produce highly uniform NWs with a diameter of 226 ± 25 nm and a plasmonic core aspect ratio of 25 to 82. By exploiting the interaction of NWs with an external magnetic field, precise arrangements into highly periodic photonic structures were achieved, which can generate distinctive structural colors that are vividly iridescent and polarization-sensitive. Furthermore, a Bouligand-type chiral nematic film consisting of multistacked unidirectional layers of achiral NWs was fabricated using a modified layer-by-layer deposition method, which displays circular dichroism (CD) and chiral sensing capability. The addition of bovine serum albumin (BSA) as a model protein analyte induced a concentration-dependent wavelength shift of CD peaks. These intriguing properties of magnetoplasmonic anisotropic NWs and their self-assemblies could be consequently valuable for developing nature-inspired structural color imprints as well as solid-state chiral sensing devices.
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Affiliation(s)
- Huu-Quang Nguyen
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Dajeong Hwang
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Sejeong Park
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - My-Chi Thi Nguyen
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Sohyun Sarah Kang
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Van Tan Tran
- Faculty of Biotechnology, Chemistry, and Environmental Engineering, Phenikaa University, Hanoi, 12116, Vietnam
| | - Jaebeom Lee
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
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Kiel T, Varytis P, Beverungen B, Kristensen PT, Busch K. Enhanced Faraday rotation by dielectric metasurfaces with Bayesian shape-optimized scatterers. OPTICS LETTERS 2021; 46:1720-1723. [PMID: 33793527 DOI: 10.1364/ol.419891] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
In this Letter, we demonstrate how to optimize the magneto-optic response of a Huygens metasurface composed of square arrays of all-dielectric nano-disk scatterers. We compare cylindrical and shape-modified disks. Both provide a strongly enhanced Faraday rotation that is accompanied by almost 100% transmittance. The shape modification obtained via a Bayesian optimization algorithm results in a 50% increase in the magneto-optic response compared to the best cylindrical disk, providing 15° of polarization rotation for a 260 nm thick metasurface.
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Vorobjova A, Tishkevich D, Shimanovich D, Zubar T, Astapovich K, Kozlovskiy A, Zdorovets M, Zhaludkevich A, Lyakhov D, Michels D, Vinnik D, Fedosyuk V, Trukhanov A. The influence of the synthesis conditions on the magnetic behaviour of the densely packed arrays of Ni nanowires in porous anodic alumina membranes. RSC Adv 2021; 11:3952-3962. [PMID: 35424352 PMCID: PMC8694122 DOI: 10.1039/d0ra07529a] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 01/13/2021] [Indexed: 11/21/2022] Open
Abstract
The densely packed arrays of Ni nanowires of 70 nm diameter and 6–12 μm length were obtained via electrodeposition into porous alumina membranes (PAAMs) of 55–75 μm thickness.
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Mohabir AT, Tutuncuoglu G, Weiss T, Vogel EM, Filler MA. Bottom-Up Masking of Si/Ge Surfaces and Nanowire Heterostructures via Surface-Initiated Polymerization and Selective Etching. ACS NANO 2020; 14:282-288. [PMID: 31854980 DOI: 10.1021/acsnano.9b04363] [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
The fully bottom-up and scalable synthesis of complex micro/nanoscale materials and functional devices requires masking methods to define key features and direct the deposition of various coatings and films. Here, we demonstrate selective coaxial lithography via etching of surfaces (SCALES), an enabling bottom-up process to add polymer masks to micro/nanoscale objects. SCALES is a three-step process, including (1) bottom-up synthesis of compositionally modulated structures, (2) surface-initiated polymerization of a conformal mask, and (3) selective removal of the mask only from regions whose underlying surface is susceptible to an etchant. We demonstrate the key features of and characterize the SCALES process with a series of model Si/Ge systems: Si and Ge wafers, Si and Ge nanowires, and Si/Ge heterostructure nanowires.
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Affiliation(s)
- Amar T Mohabir
- School of Chemical & Biomolecular Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Gozde Tutuncuoglu
- School of Chemical & Biomolecular Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Trent Weiss
- School of Chemical & Biomolecular Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Eric M Vogel
- School of Materials Science & Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Michael A Filler
- School of Chemical & Biomolecular Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
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Luong HM, Pham MT, Nguyen TD, Zhao Y. Magneto-plasmonic properties of Ag-Co composite nano-triangle arrays. NANOTECHNOLOGY 2019; 30:425203. [PMID: 31368449 DOI: 10.1088/1361-6528/ab30b8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The magneto-plasmonic properties of Ag-Co composite nano-triangle arrays are investigated. Both plasmonic and magnetic properties of the samples are found to strongly depend on the composition ratio of Ag and Co. Composite nano-triangle arrays exhibit strong plasmonic properties and low magneto-optics (MO) effect with high composition of Ag, and vice versa. The enhanced magneto-optic effect is also observed to be coincident with the localized surface plasmon resonance (LSPR) properties, i.e. the maximum Faraday effect occurs at the LSPR wavelength, which is due to locally high E-field. The composite triangle arrays with the 60% Co content show high plasmonic-MO performances characterized by magneto-optics-plasmonic correlation factor. All experimental results are confirmed by finite-difference time domain calculations.
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Affiliation(s)
- Hoang Mai Luong
- Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, United States of America
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Zákutná D, Falke Y, Dresen D, Prévost S, Bender P, Honecker D, Disch S. Morphological and crystallographic orientation of hematite spindles in an applied magnetic field. NANOSCALE 2019; 11:7149-7156. [PMID: 30778464 DOI: 10.1039/c8nr09583c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The magnetic response of spindle-shaped hematite (α-Fe2O3) nanoparticles was investigated by simultaneous small-angle and wide-angle X-ray scattering (SAXS/WAXS) experiments. The field-dependent magnetic and nematic order parameters of the magnetic single-domain nanospindles in a static magnetic field are fully described by SAXS simulations of an oriented ellipsoid with the implemented Langevin function. The experimental scattering intensities of the spindle-like particles can be modeled simply by using the geometrical (length, radius, size distribution) and magnetic parameters (strength of magnetic field, magnetic moment) obtained from isotropic SAXS and macroscopic magnetization measurements, respectively. Whereas SAXS gives information on the morphological particle orientation in the applied field, WAXS texture analysis elucidates the atomic scale orientation of the magnetic easy direction in the hematite crystal structure. Our results strongly suggest the tendency for uniaxial anisotropy but indicate significant thermal fluctuations of the particle moments within the hematite basal plane.
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Affiliation(s)
- Dominika Zákutná
- Large Scale Structures group, Institut Laue-Langevin, 71 avenue des Martyrs, F-38042 Grenoble, France
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10
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Halagačka L, Vanwolleghem M, Vaurette F, Ben Youssef J, Postava K, Pištora J, Dagens B. Magnetoplasmonic nanograting geometry enables optical nonreciprocity sign control. OPTICS EXPRESS 2018; 26:31554-31566. [PMID: 30650739 DOI: 10.1364/oe.26.031554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 09/26/2018] [Indexed: 06/09/2023]
Abstract
We experimentally demonstrate a disruptive approach to control magnetooptical nonreciprocal effects. It has been known that the combination of a magneto-optically (MO) active substrate and extraordinary transmission (EOT) effects through deep-subwavelength nanoslits of a noble metal grating, leads to giant enhancements of the magnitude of the MO effects that would normally be obtained on just the bar substrate. This was demonstrated both in the transmission configuration, where the OET is directly observed, as well as in reflection configuration, where an increase of a transmitted power results in a decrease in reflected power. We show here that even more than just an enhancement, the MO effects can also undergo a sign reversal by achieving a hybridization of the different types of resonances at play in these EOT nanogratings. By tuning the geometrical profile of the grating's slits, one can engineer - for a fixed wavelength and fixed magnetization - the transverse MO Kerr effect (TMOKE) reflectivity of such a magnetoplasmonic system to be enhanced, extinguished or inversely enhanced. We have fabricated gold gratings with varying nanoslit widths on a Bi-substituted gadolinium iron garnet and experimentally confirmed such a behavior using a customized magneto-optic Mueller matrix ellipsometer. This demonstration allows new design paradigms for integrated nonreciprocal circuits and biochemical sensors with increased sensitivity and reduced footprint.
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Bran C, Ivanov YP, Kosel J, Chubykalo-Fesenko O, Vazquez M. Co/Au multisegmented nanowires: a 3D array of magnetostatically coupled nanopillars. NANOTECHNOLOGY 2017; 28:095709. [PMID: 28139469 DOI: 10.1088/1361-6528/aa585f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Arrays of multisegmented Co/Au nanowires with designed segment lengths and diameters have been prepared by electrodeposition into aluminum oxide templates. The high quality of the Co/Au interface and the crystallographic structure of Co segments have determined by high-resolution transmission electron microscopy. Magnetic hysteresis loop measurements show larger coercivity and squareness of multisegmented nanowires as compared to single segment Co nanowires. The complementary micromagnetic simulations are in good agreement with the experimental results, confirming that the magnetic behavior is defined mainly by magnetostatic coupling between different segments. The proposed structure constitutes an innovative route towards a 3D array of synchronized magnetic nano-oscillators with large potential in nanoelectronics.
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Affiliation(s)
- C Bran
- Institute of Materials Science of Madrid, CSIC, E-28049 Madrid, Spain
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12
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Ni-Co Alloy and Multisegmented Ni/Co Nanowire Arrays Modulated in Composition: Structural Characterization and Magnetic Properties. CRYSTALS 2017. [DOI: 10.3390/cryst7030066] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Zhang S, Jiang R, Guo Y, Yang B, Chen XL, Wang J, Zhao Y. Plasmon Modes Induced by Anisotropic Gap Opening in Au@Cu2 O Nanorods. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:4264-76. [PMID: 27374920 DOI: 10.1002/smll.201600065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 05/31/2016] [Indexed: 05/10/2023]
Abstract
Integration of semiconductors with noble metals to form heteronanostructures can give rise to many interesting plasmonic and electronic properties. A number of such heteronanostructures have been demonstrated comprising noble metals and n-type semiconductors, such as TiO2 , ZnO, SnO2 , Fe3 O4 , and CuO. In contrast, reports on heteronanostructures made of noble metals and p-type semiconductors are scarce. Cu2 O is an unintentional p-type semiconductor with unique properties. Here, the uniform coating of Cu2 O on two types of Au nanorods and systematic studies of the plasmonic properties of the resultant core-shell heteronanostructures are reported. One type of Au nanorods is prepared by seed-mediated growth, and the other is obtained by oxidation of the as-prepared Au nanorods. The (Au nanorod)@Cu2 O nanostructures produced from the as-prepared nanorods exhibit two transverse plasmon peaks, whereas those derived from the oxidized nanorods display only one transverse plasmon peak. Through electrodynamic simulations the additional transverse plasmon peak is found to originate from a discontinuous gap formed at the side of the as-prepared nanorods. The existence of the gap is verified and its formation mechanism is unraveled with additional experiments. The results will be useful for designing metal-semiconductor heteronanostructures with desired plasmonic properties and therefore also for exploring plasmon-enhanced applications in photocatalysis, solar-energy harvesting, and biotechnologies.
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Affiliation(s)
- Shouren Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, Henan Province, P. R. China
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, P. R. China
- Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, 450006, Henan Province, P. R. China
| | - Ruibin Jiang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, P. R. China
| | - Yanzhen Guo
- Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, 450006, Henan Province, P. R. China
| | - Baocheng Yang
- Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, 450006, Henan Province, P. R. China
| | - Xiao-Lan Chen
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, Henan Province, P. R. China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, P. R. China
| | - Yufen Zhao
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, Henan Province, P. R. China
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian Province, P. R. China
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Liu Q, Zheng X, He J, Wang W, Fu M, Cao Y, Li H, Wu Y, Chen T, Zhang C, Chen X, Yu B, Li S, Kang J, Wu Z. Enhanced magneto-optical effects in composite coaxial nanowires embedded with Ag nanoparticles. Sci Rep 2016; 6:29170. [PMID: 27403716 PMCID: PMC4941400 DOI: 10.1038/srep29170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 06/15/2016] [Indexed: 11/30/2022] Open
Abstract
Nanostructures decorated with noble metal nanoparticles (NPs) exhibit potential for use in highly sensitive optoelectronic devices through the localized surface plasmon resonance (LSPR) effect. In this study, Faraday rotation was significantly enhanced through the structural optimization of ferromagnetic (FM)/semiconductor composite nanostructures. Experimental and theoretical results revealed that the position of noble metal NPs significantly influenced the coupling of the LSPR-enhanced electromagnetic field with FM materials. Furthermore, nanostructures embedded with noble metals demonstrated an improved capability to efficiently use the electromagnetic field compared to other structures. The Faraday rotation of ZnO/Ag(NPs)/Fe was enhanced 58 fold compared to that of the ZnO(film)/Fe. This work provides a basis for the design of nanoarchitectures for miniaturized high-performance magneto-optical devices.
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Affiliation(s)
- Qianwen Liu
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Xuanli Zheng
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Jialun He
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Weiping Wang
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Mingming Fu
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Yiyan Cao
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Heng Li
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Yaping Wu
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Ting Chen
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Chunmiao Zhang
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Xiaohong Chen
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Binbin Yu
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Shuping Li
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Junyong Kang
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China
| | - Zhiming Wu
- Fujian Provincial Key Laboratory of Semiconductors and Applications, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, P. R. China.,Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA
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15
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Kaihara T, Ando T, Shimizu H, Zayets V, Saito H, Ando K, Yuasa S. Enhancement of magneto-optical Kerr effect by surface plasmons in trilayer structure consisting of double-layer dielectrics and ferromagnetic metal. OPTICS EXPRESS 2015; 23:11537-11555. [PMID: 25969248 DOI: 10.1364/oe.23.011537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Giant enhancement of the magneto-optical Kerr effect (MOKE) by surface plasmon polaritons (SPPs) is theoretically shown in a trilayer structure consisting of double-layer dielectrics and a ferromagnetic metal (Al2O3/SiO2/Fe). We calculated the resonant enhancement of the transverse MOKE (TMOKE) and polar MOKE (PMOKE) using the attenuated total reflection (ATR) configuration with the transfer matrix method using a 4 × 4 scattering matrix. At a specific film thickness of the low-index SiO2 layer, where confinement of the SPPs on the Fe surface becomes close to the cutoff condition, the incident light from the Al2O3 couples with the SPPs at the SiO2/Fe boundary most efficiently, resulting in resonant enhancement of the MOKE at an incident angle corresponding to the wave vector of the SPPs. The calculated PMOKE showed orthogonal transformation (90°-rotation) and almost full-orbed deformation (44°-ellipticity) of the polarization, and the TMOKE showed a change in reflectance of about 34 dB upon magnetization reversal.
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16
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Toal B, McMillen M, Murphy A, Hendren W, Arredondo M, Pollard R. Optical and magneto-optical properties of gold core cobalt shell magnetoplasmonic nanowire arrays. NANOSCALE 2014; 6:12905-12911. [PMID: 25230928 DOI: 10.1039/c4nr03792h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this work we present core-shell nanowire arrays of gold coated with a nanometric layer of cobalt. Despite the extremely small Co volume, these core-shell nanowires display large magneto-optical activity and plasmonic resonance determined by the geometry of the structure. Therefore, we are able to tune both the plasmonic and magneto-optical response in the visible range. Through optical and ellipsometric measurements in transmission, and applying a magnetic field to the sample, it is possible to modulate the value of the phase angle (Del {Δ}) between the S and P polarised components. It was found that the core-shell sample produced an order of magnitude larger variation in Del with changing magnetic field direction, compared with hollow cobalt tubes. The enhancement of magneto optical properties through the plasmonic nature of the gold core is complemented with the ability to induce magnetic influence over optical properties via an externally applied field. Moreover, we demonstrate for the first time the ability to use the remanent magnetisation of the Co, in conjunction with the optical properties defined by the Au, to observe remanent optical states in this uniquely designed structure. This new class of magnetoplasmonic metamaterial has great potential in a wide range of applications, from bio-sensing to data storage due to the tuneable nature of multiple resonance modes and dual functionality.
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Affiliation(s)
- B Toal
- Queens University Belfast, University Road, Belfast, BT7 1NN, UK.
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17
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Wu Y, Dong N, Fu S, Fowlkes JD, Kondic L, Vincenti MA, de Ceglia D, Rack PD. Directed liquid phase assembly of highly ordered metallic nanoparticle arrays. ACS APPLIED MATERIALS & INTERFACES 2014; 6:5835-5843. [PMID: 24689648 DOI: 10.1021/am500695h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Directed assembly of nanomaterials is a promising route for the synthesis of nanoscale materials. In this paper, we demonstrate the directed-assembly of highly ordered two-dimensional arrays of hierarchical nanostructures with tunable size, spacing and composition. The directed assembly is achieved on lithographically patterned metal films that are subsequently pulse-laser melted; during the brief liquid lifetime, the pattened nanostructures assemble into highly ordered primary and secondary nanoparticles, with sizes below that which was originally patterned. Complementary fluid-dynamics simulations emulate the resultant patterns and show how the competition of capillary forces and liquid metal-solid substrate interaction potential drives the directed assembly. As an example of the enhanced functionality, a full-wave electromagnetic analysis has been performed to identify the nature of the supported plasmonic resonances.
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Affiliation(s)
- Yueying Wu
- Department of Materials Science and Engineering, The University of Tennessee , Knoxville, Tennessee 37996, United States
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