Gold Nanoshells Improve Single Nanoparticle Molecular Sensors

Raschke, G.; Brogl, S.; Susha, Andrei S.; Rogach, Andrey L.; Klar, Thomas A.; Feldmann, Jochen; Fieres, B.; Petkov, Nikolay; Bein, Thomas; Nichtl, Alfons; Kürzinger, Konrad

doi:10.1021/nl049038q

Cited by 254 publications

(252 citation statements)

References 30 publications

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“…Especially the spherical core-shell structure has received a considerable amount of attention [184][185][186][187] due to its excellent and tunable sensing properties, 188 which have been utilized in biological studies such as cancer therapy. 189 The plasmon hybridization allows one to position the LSPR of the nanoshell as desired by simply varying the core size R 1 and/or outer radius R 2 appropriately.…”

Section: Core-shell Nanowirementioning

confidence: 99%

Nonlocal optical response in metallic nanostructures

Raza

Bozhevolnyi

Wubs

et al. 2015

J. Phys.: Condens. Matter

369

461

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This review provides a broad overview of the studies and effects of nonlocal response in metallic nanostructures. In particular, we thoroughly present the nonlocal hydrodynamic model and the recently introduced generalized nonlocal optical response (GNOR) model. The influence of nonlocal response on plasmonic excitations is studied in key metallic geometries, such as spheres and dimers, and we derive new consequences due to the GNOR model. Finally, we propose several trajectories for future work on nonlocal response, including experimental setups that may unveil further effects of nonlocal response.

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Section: Core-shell Nanowirementioning

confidence: 99%

Nonlocal optical response in metallic nanostructures

Raza

Bozhevolnyi

Wubs

et al. 2015

J. Phys.: Condens. Matter

369

461

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“…Surface-assisted plasmon decay (Landau damping) has been extensively studied experimentally [33][34][35][36][37][38][39][40][41][42][43] and theoretically [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59] since the pioneering paper by Kawabata and Kubo [44], who have shown that, for a spherical particle of radius a, the surface scattering rate is γ sp = 3v F /4a, where v F is the electron Fermi velocity. In subsequent quantum-mechanical studies carried within random phase approximation (RPA) [45][46][47][48][49][50][51] and timedependent local density approximation (TDLDA) [52][53][54][55][56][57][58][59] approaches, a more complicated picture has emerged involving the role of confining potential and nonlocal effects.…”

Section: Introductionmentioning

confidence: 99%

Landau damping of surface plasmons in metal nanostructures

Shahbazyan

2016

Phys. Rev. B

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We develop a quantum-mechanical theory for Landau damping of surface plasmons in metal nanostructures of arbitrary shape. We show that the electron surface scattering, which facilitates plasmon decay in small nanostructures, can be incorporated into the metal dielectric function on par with phonon and impurity scattering. The derived surface scattering rate is determined by the local field polarization relative to the metal-dielectric interface and is highly sensitive to the system geometry. We illustrate our model by providing analytical results for surface scattering rate in some common shape nanostructures. Our results can be used for calculations of hot carrier generation rates in photovoltaics and photochemistry applications.

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“…[1][2][3][4] So far, many kinds of geometrical shaped MNPs, such as nano-rod, nano-cube, nano-disk, nano-ring, nano-star, nano-crescent, nano-sphere, nano-shell, have been fabricated successfully by methods of electron beam lithography, focused ion beam lithography, nano-sphere lithography, colloidal lithography, nanoimprint lithography, and solution phase synthesis, etc. [5][6][7][8][9][10][11][12] Among these MNPs, the local surface plasmon resonance (LSPR) peak of hollow MNPs (nano-ring and nano-shell) can be easily tuned to the near-infrared region while still keeping the particle size and detecting volume based on the plasmon hybridization effect. 13 And, the refractive index sensitivity (RIS) of hollow MNPs is higher than the corresponding solid MNPs due to the long wavelength of bonding mode.…”

Section: Introductionmentioning

confidence: 99%

The local surface plasmon resonance property and refractive index sensitivity of metal elliptical nano-ring arrays

Lin

Wang

et al. 2014

AIP Advances

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In this paper, we systematically investigate the optical property and refractive index sensitivity (RIS) of metal elliptical nano-ring (MENR) arranged in rectangle lattice by finite-difference time-domain method. Eight kinds of considered MENRs are divided into three classes, namely fixed at the same outer size, at the same inner size, and at the same middle size. All MENR arrays show a bonding mode local surface plasmon resonance (LSPR) peak in the near-infrared region under longitudinal and transverse polarizations, and lattice diffraction enhanced LSPR peaks emerge, when the LSPR peak wavelength (LSPRPW) matches the effective lattice constant of the array. The LSPRPW is determined by the charge moving path length, the parallel and cross interactions induced by the stable distributed charges, and the moving charges inter-attraction. High RIS can be achieved by small particle distance arrays composed of MENRs with big inner size and small ring-width. On the other hand, for a MENR array, the comprehensive RIS (including RIS and figure of merit) under transverse polarization is superior to that under longitudinal polarization. Furthermore, on condition that compared arrays are fixed at the same lattice constant, the phenomenon that the RIS of big ring-width MENR arrays may be higher than that of small ring-width MENR arrays only appears in the case of compared arrays with relatively small lattice constant and composed of MENRs fixed at the same inner size simultaneously. Meanwhile, the LSPRPW of the former MENR arrays is also larger than that of the latter MENR arrays. Our systematic results may help experimentalists work with this type of systems.

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Gold Nanoshells Improve Single Nanoparticle Molecular Sensors

Cited by 254 publications

References 30 publications

Nonlocal optical response in metallic nanostructures

Nonlocal optical response in metallic nanostructures

Landau damping of surface plasmons in metal nanostructures

The local surface plasmon resonance property and refractive index sensitivity of metal elliptical nano-ring arrays

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