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Urbancova P, Pudis D, Goraus M, Kovac J. IP-Dip-Based SPR Structure for Refractive Index Sensing of Liquid Analytes. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1163. [PMID: 33946890 PMCID: PMC8146640 DOI: 10.3390/nano11051163] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 04/25/2021] [Accepted: 04/26/2021] [Indexed: 11/18/2022]
Abstract
In this paper, we present a two-dimensional surface plasmon resonance structure for refractive index sensing of liquid analytes. The polymer structure was designed with a period of 500 nm and prepared in a novel IP-Dip polymer by direct laser writing lithography based on a mechanism of two-photon absorption. The sample with a set of prepared IP-Dip structures was coated by 40 nm thin gold layer. The sample was encapsulated into a prototyped chip with inlet and outlet. The sensing properties were investigated by angular measurement using the prepared solutions of isopropyl alcohol in deionized water of different concentrations. Sensitivity of 478-617 nm per refractive index unit was achieved in angular arrangement at external angle of incidence of 20°.
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Affiliation(s)
- Petra Urbancova
- Department of Physics, Faculty of Electrical Engineering and Information Technology, University of Zilina, Univerzitna 1, 01026 Zilina, Slovakia; (D.P.); (M.G.)
| | - Dusan Pudis
- Department of Physics, Faculty of Electrical Engineering and Information Technology, University of Zilina, Univerzitna 1, 01026 Zilina, Slovakia; (D.P.); (M.G.)
| | - Matej Goraus
- Department of Physics, Faculty of Electrical Engineering and Information Technology, University of Zilina, Univerzitna 1, 01026 Zilina, Slovakia; (D.P.); (M.G.)
| | - Jaroslav Kovac
- Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology in Bratislava, Ilkovicova 3, 81219 Bratislava, Slovakia;
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2
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Li X, Sun T, Zhou K, Hong X, Tang X, Wei D, Feng W, Shen J, Wei D. Broadband InSb/Si heterojunction photodetector with graphene transparent electrode. NANOTECHNOLOGY 2020; 31:315204. [PMID: 32272469 DOI: 10.1088/1361-6528/ab884c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Silicon-based Schottky heterojunction photodetectors are promising due to their compatibility with the semiconductor process. However, the applications of these devices are usually limited to wavelengths shorter than 1.1 µm due to the low absorption of electrode materials at infrared. In this report, silicon-based compound semiconductor heterojunction photodetectors with graphene transparent electrodes are fabricated. Due to the high absorption of InSb at infrared, as well as the good transparency and excellent electrical conductivity of the graphene, the as-prepared photodetectors show a broadband photoresponse with high performance which includes a specific detectivity of 1.9 [Formula: see text]1012 cm Hz1/2 W-1, responsivity of 132 mA W-1, on/off ratio of 1 [Formula: see text]105, rise time of 2 µs, 3 dB cut-off frequency of 172 kHz, and response wavelengths covering 635 nm, 1.55 µm and 2.7 µm. This report proves that graphene as a transparent electrode has a great effect on the performance improvement of silicon-based compound semiconductor heterojunction photodetectors.
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Affiliation(s)
- Xiaoxia Li
- College of Science, Chongqing University of Technology, Chongqing 400054, People's Republic of China. Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, People's Republic of China
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3
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Mahmood R, Johnson MB, Hillier AC. Massive Enhancement of Optical Transmission across a Thin Metal Film via Wave Vector Matching in Grating-Coupled Surface Plasmon Resonance. Anal Chem 2019; 91:8350-8357. [PMID: 31140785 DOI: 10.1021/acs.analchem.9b01148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We demonstrate how distinct surface plasmon resonance modes on opposite sides of a metal-coated grating can be coupled across the metal film. This coupling occurs by matching the resonance conditions on each side of the grating by tuning the refractive index directly adjacent to the metal film. In the first example, we deposited a high refractive index layer of tin oxide on top of the grating to red-shift the front side surface plasmon until it coupled with the backside surface plasmon across a semitransparent ∼45 nm thin silver grating. By shifting the resonance condition of the nearby surface plasmon, this high refractive index coating creates an effective matching of wave vectors across the metal film, allowing them to couple and enhance the optical response. A massive increase in the magnitude of enhanced transmission is observed, increasing from a 6-fold transmission enhancement through a bare silver grating to a near 100-fold enhancement after deposition of a tin oxide layer of appropriate thickness (∼310 nm). This optical transmission enhancement is then probed through computational modeling and by experiments with liquids of various refractive index values. The matched system shows an increased amplitude sensitivity with respect to refractive index changes and a waveguide like behavior within the tin oxide film. As an alternative configuration, we also demonstrate coupling the front and back-side plasmon modes by using a lower refractive index substrate in order to blue-shift the back-side surface plasmon. Coupling between the two plasmon modes is then demonstrated by introducing aqueous solutions of various refractive index values. Under the proper conditions, this matched system also shows a substantial enhancement in transmission. This technique of wave vector matching provides a route to substantially increasing the plasmon enhanced optical transmission through metal gratings, which has potential application in improved plasmonic sensing, spectroscopy, and plasmon-based optical devices.
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Affiliation(s)
- Russell Mahmood
- Department of Chemical and Biological Engineering , Iowa State University , Ames , Iowa 50011 , United States
| | - Michael B Johnson
- Department of Chemical and Biological Engineering , Iowa State University , Ames , Iowa 50011 , United States
| | - Andrew C Hillier
- Department of Chemical and Biological Engineering , Iowa State University , Ames , Iowa 50011 , United States
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4
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Visual Voltammogram at an Array of Closed Bipolar Electrodes in a Ladder Configuration. JOURNAL OF ANALYSIS AND TESTING 2019. [DOI: 10.1007/s41664-019-00098-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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5
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Choi B, Dou X, Fang Y, Phillips BM, Jiang P. Outstanding surface plasmon resonance performance enabled by templated oxide gratings. Phys Chem Chem Phys 2018; 18:26078-26087. [PMID: 27711494 DOI: 10.1039/c6cp04977j] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here we report a simple and scalable soft-lithography-based templating technology for fabricating Au-covered oxide (titania and zirconia) gratings by using DVDs as a structural template. The resulting plasmonic gratings simultaneously exhibit very high surface plasmon resonance (SPR) sensitivity (up to ∼940 nm per refractive index unit, nm per RIU) and figure of merit (FOM, up to 62.5). The effects of thermal annealing of the templated oxide gratings on their final plasmonic properties have been systematically investigated by both experiments and finite-difference time-domain (FDTD) simulations. Higher SPR sensitivities and slightly reduced FOMs have been observed for the annealed gratings. Additionally, the amplitude of the SPR dips gradually decreases with increasing annealing temperatures. Scanning electron microscopy and X-ray diffraction show that the annealing process enlarges the crystal domain sizes of the oxides and smoothens the final plasmonic grating surface. Systematic FDTD simulations reveal that the SPR properties (e.g., dip amplitude) of Au-covered oxide gratings are significantly affected by the deformation of the track-pitch structure caused by thermal annealing, agreeing with the experimental results. The outstanding SPR performance combined with the high thermal stability of the crystalline oxides could make the templated plasmonic gratings a promising SPR platform for many important sensing applications, such as in situ probing heterogeneous catalytic reactions under realistic conditions.
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Affiliation(s)
- Baeck Choi
- Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA.
| | - Xuan Dou
- Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA.
| | - Yin Fang
- Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA.
| | - Blayne M Phillips
- Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA.
| | - Peng Jiang
- Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA.
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6
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Transmission surface plasmon resonance techniques and their potential biosensor applications. Biosens Bioelectron 2018; 99:399-415. [DOI: 10.1016/j.bios.2017.07.069] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 07/09/2017] [Accepted: 07/28/2017] [Indexed: 02/05/2023]
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7
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Wojnarowska-Nowak R, Polit J, Broda D, Bobitski Y, Starowicz Z, Gonchar M, Sheregii EM. Surface-enhanced Raman scattering and Plasmon effect for enzymatic bionanocomplexes characterization. EPJ WEB OF CONFERENCES 2017. [DOI: 10.1051/epjconf/201713305001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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8
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Chen KP, Ye SC, Yang CY, Yang ZH, Lee W, Sun MG. Electrically tunable transmission of gold binary-grating metasurfaces integrated with liquid crystals. OPTICS EXPRESS 2016; 24:16815-16821. [PMID: 27464134 DOI: 10.1364/oe.24.016815] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Planar photonics using metasurfaces is of great interest because a metasurface can control the flow of light beyond that attainable with natural materials. The resonance wavelength of a binary-grating metasurface is adjustable by changing the width and thickness of the nanostructure. We propose a novel combination of nematic liquid crystals and a binary-grating metasurface with which the diffraction efficiency can be controlled by adjusting the applied voltage.
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9
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Lectin binding studies on a glycopolymer brush flow-through biosensor by localized surface plasmon resonance. Anal Bioanal Chem 2016; 408:5633-40. [DOI: 10.1007/s00216-016-9667-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 05/20/2016] [Accepted: 05/25/2016] [Indexed: 01/01/2023]
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10
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Yen YR, Lee TH, Wu ZY, Lin TH, Hung YJ. Comprehensive three-dimensional analysis of surface plasmon polariton modes at uniaxial liquid crystal-metal interface. OPTICS EXPRESS 2015; 23:32377-32386. [PMID: 26699027 DOI: 10.1364/oe.23.032377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This paper describes the derivation of surface plasmon polariton modes associated with the generalized three-dimensional rotation of liquid crystal molecules on a metal film. The calculated dispersion relation was verified by coupling laser light into surface plasmon polariton waves in a one-dimensional grating device. The grating-assisted plasmon coupling condition was consistent with the formulated k(spp) value. This provides a general rule for the design of liquid-crystal tunable plasmonic devices.
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11
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Perino M, Pasqualotto E, Scaramuzza M, De Toni A, Paccagnella A. Enhancement and control of surface plasmon resonance sensitivity using grating in conical mounting configuration. OPTICS LETTERS 2015; 40:221-224. [PMID: 25679849 DOI: 10.1364/ol.40.000221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work we propose a method to enhance and control the angular sensitivity of a grating coupled surface plasmon resonance (GCSPR) sensor. We lighted a silver grating, mounted in conical configuration, with a laser source and we measured the transmittance of the grating as a function of the azimuthal angle. To evaluate the sensitivity, grating surface was functionalized with four different alkanethiol self assembled monolayers (SAM) and the correspondent azimuthal transmittance peak shifts were measured. The sensitivity control was performed by simply change the light incident angle. This method offers the possibility to design dynamic GCSPR sensor benches that can be used to amplify the SPR angle shift at any step of a biological detection process.
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12
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In Situ Study of Electropolymerized Poly(3-aminobenzoic acid) Thin Film on BD-R and DVD-R Grating Substrates by Electrochemical-Transmission Surface Plasmon Resonance Spectroscopy. INT J POLYM SCI 2015. [DOI: 10.1155/2015/650516] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The electropolymerization process and doping/dedoping properties of poly(3-aminobenzoic acid) (PABA) thin films on gold-coated commercial BD-R and DVD-R grating substrates were simultaneously studied by the combination of electrochemical technique and transmission surface plasmon resonance (TSPR) spectroscopy. The optical property as a function of the applied potentials and time dependence during electropolymerization were studied. The obtained TSPR wavelength scan spectra after electropolymerization showed that the maximum wavelength slightly shifted to longer wavelength indicating the increase of film thickness. In addition, the change during construction of PABA-based immunosensor for label-free detection of human immunoglobulin G can be observed.
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13
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O'Mullane S, Peterson B, Race J, Keller N, Diebold AC. Enhancing one dimensional sensitivity with plasmonic coupling. OPTICS EXPRESS 2014; 22:26246-26253. [PMID: 25401657 DOI: 10.1364/oe.22.026246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this paper, we propose a cross-grating structure to enhance the critical dimension sensitivity of one dimensional nanometer scale metal gratings. Making use of the interaction between slight changes in refractive index and localized plasmons, we demonstrate sub-angstrom scale sensitivity in this structure. Compared to unaltered infinite metal gratings and truncated finite gratings, this cross-grating structure shows robust spectra dependent mostly on the dimension of the smaller line width and pitch. While typical scatterometry simulations show angstrom resolution at best, this structure has demonstrated picometer resolution. Due to the wide range of acceptable specifications, we expect experimental confirmation of such structures to soon follow.
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14
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Wang W, Zhao D, Chen Y, Gong H, Chen X, Dai S, Yang Y, Li Q, Qiu M. Grating-assisted enhanced optical transmission through a seamless gold film. OPTICS EXPRESS 2014; 22:5416-5421. [PMID: 24663881 DOI: 10.1364/oe.22.005416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this paper, we experimentally demonstrate enhanced optical transmission through a seamless gold film based on the grating-insulator-metal (GIM) architecture. The transmittance of this GIM structure reaches 40% at 930 nm, showing 3.7 dB and 9.1 dB increase compared with a bare gold film and a continuous metal-insulator-metal stack, respectively. The enhanced transmission is polarization-sensitive and robust for oblique incidence. With tunable transmission peaks, such a device exhibits great potential for applications in optical filtering, polarization detecting and further integration in optoelectronics system.
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15
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Leong ESP, Wu S, Zhang N, Loh WW, Khoo EH, Si GY, Dai HT, Liu YJ. Optical properties of ultrafine line and space polymeric nanogratings coated with metal and metal-dielectric-metal thin films. NANOTECHNOLOGY 2014; 25:055203. [PMID: 24406796 DOI: 10.1088/0957-4484/25/5/055203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Noble metal and metal-dielectric-metal ultrathin films were deposited on the surfaces of ultrafine polymeric nanogratings, which were fabricated using nanoimprint lithography. Experimental results showed dramatic differences of the surface morphologies for single metal and triple metal-dielectric-metal films deposited on flat and corrugated polymeric surfaces. The effect of the surface morphology on the optical properties was hence investigated and analyzed under linearly polarized light. The surface plasmon resonances of single metal and triple metal-dielectric-metal films deposited on polymeric nanograting surfaces were also characterized based on the Kretschmann prism-coupling method. The single metal and triple metal-dielectric-metal films deposited on polymeric nanograting surfaces are important for the study of photon-plasmon interactions (i.e. couplings and conversions) at the interfaces between a nanograting and metal films.
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Affiliation(s)
- Eunice Sok Ping Leong
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore
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16
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Yeh WH, Hillier AC. Use of Dispersion Imaging for Grating-Coupled Surface Plasmon Resonance Sensing of Multilayer Langmuir–Blodgett Films. Anal Chem 2013; 85:4080-6. [DOI: 10.1021/ac400144q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wei-Hsun Yeh
- Department of Chemical
and Biological Engineering, Iowa State University, Ames, Iowa, United States
| | - Andrew C. Hillier
- Department of Chemical
and Biological Engineering, Iowa State University, Ames, Iowa, United States
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17
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Malic L, Morton K, Clime L, Veres T. All-thermoplastic nanoplasmonic microfluidic device for transmission SPR biosensing. LAB ON A CHIP 2013; 13:798-810. [PMID: 23287840 DOI: 10.1039/c2lc41123g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Early and accurate disease diagnosis still remains a major challenge in clinical settings. Biomarkers could potentially provide useful tools for the detection and monitoring of disease progression, treatment safety and efficacy. Recent years have witnessed prodigious advancement in biosensor development with research directed towards rapid, real-time, label-free and sensitive biomarker detection. Among emerging techniques, nanoplasmonic biosensors pose tremendous potential to accelerate clinical diagnosis with real-time multiplexed analysis, rapid and miniaturized assays, low sample consumption and high sensitivity. In order to translate these technologies from the proof-of-principle concept level to point of care clinical diagnosis, integrated, portable devices having small footprint cartridges that house low-cost disposable consumables are sought. Towards this goal, we developed an all-polymeric nanoplasmonic microfluidic (NMF) transmission surface plasmon resonance (SPR) biosensor. The device was fabricated in thermoplastics using a simple, single step and cost-effective hot embossing technique amenable to mass production. The novel 3D hierarchical mold fabrication process enabled monolithic integration of blazed nanogratings within the detection chambers of a multichannel microfluidic system. Consequently, a single hard thermoplastic bottom substrate comprising plasmonic and fluidic features allowed integration of active fluidic elements, such as pneumatic valves, in the top soft thermoplastic cover, increasing device functionality. A simple and compact transmission-based optical setup was employed with multiplexed end-point or dual-channel kinetic detection capability which did not require stringent angular accuracy. The sensitivity, specificity and reproducibility of the transmission SPR biosensor was demonstrated through label-free immunodetection of soluble cell-surface glycoprotein sCD44 at clinically relevant picomolar to nanomolar concentrations.
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Affiliation(s)
- Lidija Malic
- National Research Council Canada, Boucherville, QC, Canada
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18
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Dou X, Phillips BM, Chung PY, Jiang P. High surface plasmon resonance sensitivity enabled by optical disks. OPTICS LETTERS 2012; 37:3681-3683. [PMID: 22940989 DOI: 10.1364/ol.37.003681] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report a systematic, experimental, and theoretical investigation on the surface plasmon resonance (SPR) sensing using optical disks with different track pitches, including Blu-ray disk (BD), digital versatile disk (DVD), and compact disk (CD). Optical reflection measurements indicate that CD and DVD exhibit much higher SPR sensitivity than BD. Both experiments and finite-difference time-domain simulations reveal that the SPR sensitivity is significantly affected by the diffraction order of the SPR peaks and higher diffraction order results in lower sensitivity. Numerical simulations also show that very high sensitivity (∼1600 nm per refractive index unit) is achievable by CDs.
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Affiliation(s)
- Xuan Dou
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, USA
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19
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Janmanee R, Baba A, Phanichphant S, Sriwichai S, Shinbo K, Kato K, Kaneko F. In situ electrochemical-transmission surface plasmon resonance spectroscopy for poly(pyrrole-3-carboxylic acid) thin-film-based biosensor applications. ACS APPLIED MATERIALS & INTERFACES 2012; 4:4270-4275. [PMID: 22856530 DOI: 10.1021/am300970m] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this study, we describe the combination of transmission surface plasmon resonance (TSPR) and electrochemical techniques for the application to biosensors with conducting polymers. Electropolymerization was employed to construct poly(pyrrole-3-carboxylic acid) (PP3C) film on a gold-coated grating substrate using pyrrole-3-carboxylic acid (P3C) monomer solution in 0.5 M H(2)SO(4). In situ electrochemical-transmission surface plasmon resonance (EC-TSPR) measurements were carried out to study the kinetic and electroactivity properties of PP3C film. Immobilization of antihuman IgG on the activated surface and the binding process of human IgG and antihuman IgG in neutral solution could be detected in situ by EC-TSPR measurement. The surface modification steps on the PP3C layer led to an increase in intensity of the transmission peak. The performance, sensitivity, and utility of EC-TSPR spectroscopy showed obvious advantages for the detection of binding process with the simple experimental setup, and could be applied to the study of biomolecular interactions in various systems.
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Affiliation(s)
- Rapiphun Janmanee
- Center for Transdisciplinary Research and Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
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20
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Gandhiraman RP, Le NCH, Dixit CK, Volcke C, Doyle C, Gubala V, Uppal S, Monaghan R, James B, O'Kennedy R, Daniels S, Williams DE. Multi-layered plasma-polymerized chips for SPR-based detection. ACS APPLIED MATERIALS & INTERFACES 2011; 3:4640-4648. [PMID: 22029622 DOI: 10.1021/am201061k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The surface functionalization of a noble metal is crucial in a surface plasmon resonance-based biomolecular detection system because the interfacial coating must retain the activity of immobilized biomolecules while enhancing the optimal loading. We present here a one-step, room-temperature, high-speed, gas-phase plasma polymerization process for functionalizing gold substrates using siloxane as an adhesion layer and acrylic acid as a functional layer. Siloxane- and thiol-based coatings were compared for their performance as adhesion and the interfacial layer for subsequent functionalization. An in situ sequential deposition of siloxane and acrylic acid resulted in a 7-fold increase in carboxylic functionality surfacial content compared to films deposited with thiol-containing precursors. Grading of the layer composition achieved as a consequence of ion-induced mixing on the surface coating under the application of the plasma is confirmed through secondary ion mass spectroscopic studies. DNA hybridization assays were demonstrated on gold/glass substrates using surface plasmon enhanced ellipsometry and the applicability of this coating for protein immunoassays were demonstrated with plasma functionalized gold/plastic substrates in Biacore 3000 SPR instrument.
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Affiliation(s)
- Ram P Gandhiraman
- Biomedical Diagnostics Institute (BDI), Dublin City University, Glasnevin, Dublin-9, Ireland.
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21
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Yeh WH, Petefish JW, Hillier AC. Diffraction-Based Tracking of Surface Plasmon Resonance Enhanced Transmission Through a Gold-Coated Grating. Anal Chem 2011; 83:6047-53. [DOI: 10.1021/ac201096f] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei-Hsun Yeh
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Joseph W. Petefish
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Andrew C. Hillier
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011, United States
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Liu YJ, Zheng YB, Liou J, Chiang IK, Khoo IC, Huang TJ. All-Optical Modulation of Localized Surface Plasmon Coupling in a Hybrid System Composed of Photo-Switchable Gratings and Au Nanodisk Arrays. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2011; 115:7717-7722. [PMID: 21643480 PMCID: PMC3105912 DOI: 10.1021/jp111256u] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
We conduct a real-time study of all-optical modulation of localized surface plasmon resonance (LSPR) coupling in a hybrid system that integrates a photo-switchable optical grating with a gold nanodisk array. This hybrid system enables us to investigate two important interactions: 1) LSPR-enhanced grating diffraction, and 2) diffraction-mediated LSPR in the Au nanodisk array. The physical mechanism underlying these interactions was analyzed and experimentally confirmed. With its advantages in cost-effective fabrication, easy integration, and all-optical control, the hybrid system described in this work could be valuable in many nanophotonic applications.
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Affiliation(s)
- Yan Jun Liu
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Yue Bing Zheng
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Justin Liou
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - I-Kao Chiang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Iam Choon Khoo
- Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Tony Jun Huang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
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23
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Yeh WH, Kleingartner J, Hillier AC. Wavelength Tunable Surface Plasmon Resonance-Enhanced Optical Transmission Through a Chirped Diffraction Grating. Anal Chem 2010; 82:4988-93. [DOI: 10.1021/ac100497w] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Wei-Hsun Yeh
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011
| | - Justin Kleingartner
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011
| | - Andrew C. Hillier
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011
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