Observation of plasmon line broadening in single gold nanorods

Qiu, Le; Larson, Timothy; Smith, Daniel H.; Vitkin, Edward; Modell, Mark D.; Korgel, Brian A.; Sokolov, Konstantin; Hanlon, Eugene B.; Itzkan, Irving; Perelman, Lev T.

doi:10.1063/1.2995982

Cited by 28 publications

(28 citation statements)

References 20 publications

(12 reference statements)

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“…Due to the SPR excitation, light absorption and scattering by gold nanoparticles is strongly enhanced, thereby contributing to strong total light extinction. This can be seen from the quantitative description of the cross-sections of absorption (C abs ), scattering (C sca ), and total extinction (C ext ) derived from Gans theory [16,17]:…”

Section: Cell Viability Assaymentioning

confidence: 99%

Surface plasmon resonance scattering and absorption of biofunctionalized gold nanoparticles for targeted cancer imaging and laser therapy

Kang

2011

Sci. China Technol. Sci.

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The localized surface plasmon resonance of gold nanoparticles enables them to be excellent light scattering sensing reagents and efficient lignt-heat convertors for potential diagnostics and therapeutics. In this work, gold nanoparticles of 15 nm in size were synthesized and conjugated with a kind of arginine-glycine-aspartic acid peptide (RGD) to target the cancer cells. Under a conventional dark field microscope, the scattering images from normal and cancer cells are very different. Only a few of gold nanoparticles bind to the membrane of normal cells due to nonspecific interaction. Yet for cancer cells, the concentration of gold nanoparticles inside cancer cells is much higher than that inside normal cells, showing a strong light scattering signal. By exposing these cells to an external laser irradiation, cancer cells were selectively destructed because of the heat conversion of gold nanoparticles inside them, but normal cells still kept alive due to the absence of gold nanoparticles in them. These results incidated that gold nanoparticles might be potential contrast reagents for targeted cancer imaging and laser therapy.surface plasmon, gold nanoparticles, cancer imaing, laser therapy Citation:Ge Y, Kang B. Surface plasmon resonance scattering and absorption of biofunctionalized gold nanoparticles for targeted cancer imaging and laser therapy.

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Section: Cell Viability Assaymentioning

confidence: 99%

Surface plasmon resonance scattering and absorption of biofunctionalized gold nanoparticles for targeted cancer imaging and laser therapy

Kang

2011

Sci. China Technol. Sci.

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“…So far, the design of sensors or detectors based on single GNRs generally relies on the detection of the modification in their linear optical properties such as scattering. From the experimental point of view, the LSPRs of GNRs can be detected through the measurements of the scattering spectra of GNRs by using dark-field microscopy [14][15][16]. However, the signal to noise ratio in the scattering spectra measurements is generally not satisfied for small GNRs whose extinction is dominated by absorption rather than scattering [17,18].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of nanoparticle sensors based on the detection of the two-photon-induced luminescence of gold nanorod antennas

et al. 2014

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We investigate numerically the modification of the nonlinear optical properties of a nanoantenna in the trapping of nanoparticles (NPs) by using both the discrete dipole approximation method and the finite-difference time-domain technique. The nanoantenna, which is formed by two gold nanorods (GNRs) aligned end to end and separated by a small gap, can emit strong two-photon-induced luminescence (TPL) under the excitation of a femtosecond laser light which is resonant with its longitudinal surface plasmon resonance. In addition, the excited antenna can stably trap small NPs which in turn induce modifications in the emitted TPL. These two features make it a promising candidate for building highly sensitive detectors for NPs of different materials and sizes. It is demonstrated that sensors built with antennas possess higher sensitivities than those built with single GNRs and nanorodbased antennas are more sensitive than nanoprism-based antennas. In addition, it is found that the trapping probability for a second NP is significantly reduced for the antenna with a trapped NP, implying that trapping of NPs may occur sequentially. A relationship between the TPL of the system (antenna + NP) and the optical potential energy of the NP is established, enabling the extraction of the information on the optical potential energy and optical force by recording the TPL of the system. It is shown that the sequential trapping and releasing of NPs flowing in a microfluid channel can be realized by designing two different antennas arranged closely.

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“…T-matrix calculations of optical resonances in nonspherical particles and particle clusters [4,5,15,18,26,40,48,49,61,72,74,79,[86][87][88][92][93][94]100,154,155,164,169,183,184,197,198,199,211,228,233]. [12,24,25,42,95,113,138,139,189,190,191].…”

Section: T-matrix Calculations For Particles With One or Several (Eccmentioning

confidence: 99%

Comprehensive T-matrix reference database: A 2006–07 update

Mishchenko

Videen

Khlebtsov

et al. 2008

Journal of Quantitative Spectroscopy and Radiative Transfer

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a b s t r a c tThe T-matrix method is among the most versatile, efficient, and widely used theoretical techniques for the numerically exact computation of electromagnetic scattering by homogeneous and composite particles, clusters of particles, discrete random media, and particles in the vicinity of an interface separating two half-spaces with different refractive indices. This paper presents an update to the comprehensive database of Tmatrix publications compiled by us previously and includes the publications that appeared since 2007. It also lists several earlier publications not included in the original database.Published by Elsevier Ltd.

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Observation of plasmon line broadening in single gold nanorods

Cited by 28 publications

References 20 publications

Surface plasmon resonance scattering and absorption of biofunctionalized gold nanoparticles for targeted cancer imaging and laser therapy

Surface plasmon resonance scattering and absorption of biofunctionalized gold nanoparticles for targeted cancer imaging and laser therapy

Numerical study of nanoparticle sensors based on the detection of the two-photon-induced luminescence of gold nanorod antennas

Comprehensive T-matrix reference database: A 2006–07 update

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