Nanowire-based enhancement of localized surface plasmon resonance for highly sensitive detection: a theoretical study

Kim, Kyujung; Yoon, Soon Joon; Kim, Dong-Hyun

doi:10.1364/oe.14.012419

Cited by 108 publications

(58 citation statements)

References 32 publications

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“…Electrical properties of metallic nanowires are of interest to researchers and industry from the point view of the potential applications in the future electronic devices [1][2][3]. The surface and size effects emerge as dimensions shrinking to the nanoscale.…”

Section: Introductionmentioning

confidence: 99%

Electrical Properties of Cu Nanowires

Huang

Lilley

Bode

et al. 2008

2008 8th IEEE Conference on Nanotechnology

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Abstract-Copper nanowires were patterned with e-beam lithography and fabricated with an e-beam evaporated Cu film. Electrical properties, including resistivity and temperature coefficient of resistance, were characterized for Cu nanowires with a width range of 90 nm to 330 nm. It was experimentally found that the surface and size have apparent influence on the electrical properties. The measured resistivity of the Cu nanowires was found to be size dependent, which was in good agreement with the theoretical models. In addition, smaller values of the temperature coefficient of resistance were experimentally found as the wire width decreases for the Cu nanowires. The size dependent nature of the temperature coefficient of resistance was attributed to the surface and size effects based on the further demonstrative analysis.

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Section: Introductionmentioning

confidence: 99%

Electrical Properties of Cu Nanowires

Huang

Lilley

Bode

et al. 2008

2008 8th IEEE Conference on Nanotechnology

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“…The initial value of 1.462 corresponds to an ssDNA layer with a density of 0.028 g/cm 3 , obtained from the ellipsometry measurements. After the hybridization events, the dsDNA layer with a density of 0.061 g/cm 3 corresponding to the refractive index of 1.52 will be obtained [11]. The optical characteristics (e.g., S-parameters) of the biosensor are a ected by the biomolecular interactions between ssDNA and cDNA.…”

Section: Resultsmentioning

confidence: 99%

Graphene Based Nano Bio-sensor: Sensitivity Improvement

Majdi

Fathi

2017

Scientia Iranica

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Abstract. In this paper, we attempt to present a multilayer-structure biosensor. A graphene-based Surface Plasmon Resonance (SPR) biosensor is considered as a structure, which o ers enhancement of sensitivity in comparison with the conventional biosensors. The sensitivity improvement caused by the presence of graphene is discussed through monitoring of the biomolecular interactions and following that the Refractive Index (RI) changes. For this purpose, an RI change, which increases during the course of biomolecular interaction, is considered from 1.462 to 1.52. Our numerical results show that the proposed SPR biosensor with a graphene layer can provide a better sensitivity due to the eld distribution at the binding region. This paper investigates the Sensitivity Enhancement Factor (SEF) according to the S-parameters and the e ects of design parameters such as thicknesses of the gold and graphene layers and the refractive index change during the course of DNA hybridization in this biosensor.

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“…The use of colloidal Au as a nanoparticles tag for the detection of DNA hybridization has shown great improvement in the sensitivity compared to those without Au (He et al 2000). The use of localized surface plasmon resonance (LSPR) to enhance the sensitivity of the waveguides for biosensors has also been addressed (Byun et al 2005;Kim et al 2006). A low propagation loss can be achieved by exhibiting the long-range surface plasmon polarition (LR-SPP) in thin gold stripes embedded in polymer (Nikolajsen et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Surface plasmon resonance-enhanced light interaction in an integrated ormocomp nanowire

et al. 2016

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An integrated ormocomp nanowire coated with gold metal layer is proposed and its optical characteristics with the effect of surface plasmon resonance (SPR) are studied. The integrated rib-like nanowire has a trapezoidal shape with sidewall angles of 75°. It is coated with 50 nm gold layer to introduce the SPR and enhance the evanescent field in the sensing region located at the dielectric/metal interface. The possible field modes, the normalized power confinement, and the SPR peak position of the nanowire are studied over the wavelength and the metal thickness by using the full-vectorial H-field FEM in quasi-TM mode. The attenuation coefficient of the nanowire, the SPR peak wavelength, and the wavelength shift is experimentally extracted for three different cladding materials. The redshift of the supermode coupling between the dielectric mode and the anti-symmetric supermode is observed with the higher cladding-index and larger metal thickness. The improvement of the power confinement in the sensing region with the SPR effect is ten times (109) better than a previous similar study.

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Nanowire-based enhancement of localized surface plasmon resonance for highly sensitive detection: a theoretical study

Cited by 108 publications

References 32 publications

Electrical Properties of Cu Nanowires

Electrical Properties of Cu Nanowires

Graphene Based Nano Bio-sensor: Sensitivity Improvement

Surface plasmon resonance-enhanced light interaction in an integrated ormocomp nanowire

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