Drastic Reduction of Plasmon Damping in Gold Nanorods

Sönnichsen, Carsten; Franzl, Thomas; Wilk, Tatjana; Plessen, G. von; Feldmann, Jochen; Wilson, Orla M.; Mulvaney, Paul

doi:10.1103/physrevlett.88.077402

Cited by 1,662 publications

(2,071 citation statements)

References 21 publications

Supporting

108

Mentioning

1,949

Contrasting

Unclassified

Order By: Relevance

“…A large number of theoretical and experimental studies were dedicated to the understanding of PP physics and revealed fascinating properties. [1][2][3][4] For example, PPs in gold particles are linked to broad band photoluminescence 2 and strong local field enhancement, making these nanostructures promising candidates for a variety of different applications. 4 In addition, the high biocompatibility of gold nanoparticles has stimulated their widespread use in the biosciences within the last few years.…”

mentioning

confidence: 99%

“…[1][2][3][4] For example, PPs in gold particles are linked to broad band photoluminescence 2 and strong local field enhancement, making these nanostructures promising candidates for a variety of different applications. 4 In addition, the high biocompatibility of gold nanoparticles has stimulated their widespread use in the biosciences within the last few years. [5][6][7][8][9][10] Gold particles were used as intramolecular distance rulers, 5 as non bleaching sensors, 6 and as labels for multiphoton microscopy.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Orientational Imaging of Subwavelength Au Particles with Higher Order Laser Modes

et al. 2006

View full text Add to dashboard Cite

We present a new method for the imaging of single metallic nanoparticles that provides information about their shape and orientation. Using confocal microscopy in combination with higher order laser modes, scattering images of individual particles are recorded. Gold nanospheres and nonorods render characteristic patterns reflecting the different particle geometries. In the case of nanorods, the scattering patterns also reveal the orientation of the particles. This novel technique provides a promising tool for the visualization of nonbleaching labels in the biosciences.

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Orientational Imaging of Subwavelength Au Particles with Higher Order Laser Modes

et al. 2006

View full text Add to dashboard Cite

show abstract

“…The bandwidth, or full width half maximum (FWHM) of the absorption peak is inversely proportional to the coherence time, or period that the oscillating electrons stay in-phase before damping [14,18,19]. The effective radiative damping of a dipolar plasmon will be proportional to the nanoparticle volume where smaller nanoparticles will have intrinsic, or thermoelastic, damping as their dominant decay mechanism [9,20].…”

Section: Localized Surface Plasmon Resonance (Lspr) and Mie Theorymentioning

confidence: 99%

“…The scattering contribution can then be calculated by subtracting the absorption coefficient from the total extinction value. Here the real part of the dielectric constant determines the position of the wavelength while the bandwidth, or time spent dephasing, is determined by the imaginary component [18,[30][31][32][33]. In general, for smaller nanoparticles, <40 nm, the optical extinction is dominated by absorption whereas scattering contributions increase as the diameter of the nanoparticle grows [21,33,34].…”

Section: Localized Surface Plasmon Resonance (Lspr) and Mie Theorymentioning

confidence: 99%

Controllable Cobalt Oxide/Au Hierarchically Nanostructured Electrode for Nonenzymatic Glucose Sensing

2016

View full text Add to dashboard Cite

By electrodeposition and galvanic replacement reaction, we developed a facile, time-saving, cost-effective, and environmentally friendly, two-step synthesis route to obtain a controllable cobalt oxide/Au hierarchically nanostructured electrode for glucose sensing. The nanomaterials were characterized by transmission electron microscopy, scanning electron microscopy, Raman spectroscopy, energy-dispersive spectrometry, and X-ray photoelectron spectroscopy, meanwhile, the sensing performance was investigated by cyclic voltammetry and amperometric response. The results revealed that this novel electrode exhibited excellent electrocatalytic performance toward glucose oxidation, with a wide double-linear range from 0.2 μM to 20 mM and a low detection limit of 0.1 μM based on a signal-to-noise ratio of 3, which was mainly attributed to the ability of loading a small amount of Au with good electron conductivity on the surface of cobalt oxide nanosheets with large active surface area and synergistic electrocatalytic activity of Au and cobalt oxide toward glucose electrooxidation. This facile, sensitive, and selective glucose sensor is also proven to be suitable for the detection of glucose in human serum.

show abstract

“…Such interaction results in an enhancement of electromagnetic field as well as maximum scattering at a resonant wavelength for a metallic nanostructure, which can be explained by a radiative theory 4, 5. The integration of nanoplasmonics has been demonstrated recently with stretchable, flexible, or biocompatible substrates in order to enable new functionalities for low cost, disposable, and wearable biosensors 6, 7.…”

Section: Introductionmentioning

confidence: 99%

Contact Transfer Printing of Side Edge Prefunctionalized Nanoplasmonic Arrays for Flexible microRNA Biosensor

et al. 2015

View full text Add to dashboard Cite

For a nanoplasmonic approach of wearable biochip platform, understanding correlation between near‐field enhancement on nanostructures and sensing capability is a crucial step to improve the sensitivity in biosensing. A novel and effective method is demonstrated to increase sensitivity with the enhanced electric fields and to reduce noise with targeted functionalization enabled by transferring side edge prefunctionalized (SEPF) nanostructure arrays onto flexible substrates. Nanostructure sidewalls have selective biochemically functional terminals for the hybridization of microRNAs (miRNAs) and the immobilization of resonant nanoparticles, thus forming hetero assemblies of the nanostructure and the nanoparticles. The unique configuration has shown ultrasensitive biosensing of miRNA‐21 in a 10 × 10−15 m level by a red‐shift in scattering spectra induced by a plasmon coupling. This ultrasensitive SEPF nanostructure arrays are fabricated on a flexible substrate using a contact transfer printing with a release layer of trichloro(1H, 1H, 2H, 2H‐perfluorooctyl)silane. The introduction of the release layer at a prefunctionalizing step has proven to provide selective functionalization only on the sidewalls of the nanostructures. This reduces a background noise caused by the scattering from nonspecifically bound nanoparticles on the substrate, thus enabling reliable and precise detection.

show abstract

Drastic Reduction of Plasmon Damping in Gold Nanorods

Cited by 1,662 publications

References 21 publications

Orientational Imaging of Subwavelength Au Particles with Higher Order Laser Modes

Orientational Imaging of Subwavelength Au Particles with Higher Order Laser Modes

Controllable Cobalt Oxide/Au Hierarchically Nanostructured Electrode for Nonenzymatic Glucose Sensing

Contact Transfer Printing of Side Edge Prefunctionalized Nanoplasmonic Arrays for Flexible microRNA Biosensor

Contact Info

Product

Resources

About