Correlated Absorption and Photoluminescence of Single Gold Nanoparticles

Gaiduk, Alexander; Yorulmaz, Mustafa; Orrit, Michel

doi:10.1002/cphc.201100167

Cited by 55 publications

(67 citation statements)

References 40 publications

(56 reference statements)

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“…Our measurements showed that, for holes with a diameter from 20 nm to 1 µm, the photoluminescence efficiency is almost the same and is about 10 −6 , which is approximately 10 4 times higher compared to the photoluminescence from the surface of the bare gold. These data agree well with measurement results for spherical gold nanoparticles [6,17]. The fact supports plasmonic nature of the measured high efficiency of the PL process in nanoholes.…”

Section: Photoluminescence Of Individual Nanoholesupporting

confidence: 91%

Single nanohole and photoluminescence: nanolocalized and wavelength tunable light source

Melentiev¹,

Konstantinova²,

Afanasiev³

et al. 2012

Opt. Express

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We are first to demonstrate a broadband, nanometer-scale, and background-free light source that is based on photoluminescence of a single nanohole in an Au film. We show that a nanohole with a diameter of as small as 20 nm in a 200-nm thick Au film can be used for this purpose. Further development of the localized source that involves the use of a photon-crystal microcavity with a Q-factor of 100 makes it possible to create a 30-fold enhanced, narrowband tunable light source and with a narrow directivity of the radiation.

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Section: Photoluminescence Of Individual Nanoholesupporting

confidence: 91%

Single nanohole and photoluminescence: nanolocalized and wavelength tunable light source

Melentiev¹,

Konstantinova²,

Afanasiev³

et al. 2012

Opt. Express

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“…The particles and the glass substrates were cleaned from organic ligands by repeated flushing and ozone cleaning. We checked that all particles used in the present work were isolated single ones, by photothermal contrast [24]. The particles were covered with the liquid (water or n-pentane), so that bubbles could form in the half-space limited by the flat glass-liquid interface.…”

Section: Methodsmentioning

confidence: 99%

Explosive formation and dynamics of vapor nanobubbles around a continuously heated gold nanosphere

et al. 2015

Self Cite

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We form sub-micrometer-sized vapor bubbles around a single laser-heated gold nanoparticle in a liquid and monitor them through optical scattering of a probe laser. Bubble formation is explosive even under continuous-wave heating. The fast, inertia-governed expansion is followed by a slower contraction and disappearance after some tens of nanoseconds. In a narrow range of illumination powers, bubble time traces show a clear echo signature. We attribute it to sound waves released upon the initial explosion and reflected by flat interfaces, hundreds of microns away from the particle. Echoes can trigger new explosions. A nanobubble's steady state (with a vapor shell surrounding the heated nanoparticle) can be reached by a proper time profile of the heating intensity. Stable nanobubbles could have original applications for light modulation and for enhanced optical-acoustic coupling in photoacoustic microscopy.

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“…[ 29,33 ] In contrast, the polarization modulation depth for metal nanoparticles, much larger in size than the few atom silver clusters addressed in this paper, varies widely with a strong dependence on the specifi c nanoparticle shape. [ 31 ] Because the fl uorescence quantum yields of metal nanoparticles are very small (∼0.001% or less), [ 9,34 ] most polarization measurements have focused on determining the single nanoparticle extinction as a function of the polarization, θ ex , of the excitation light, using techniques such as photothermal imaging, [ 35 ] light scattering microscopy, [ 36 ] and extinction microscopy. [ 37 ] The intensity dependence on θ ex has the same overall sinusoidal form as for individual molecules Equation 2 .…”

Section: Full Paper Full Paper Full Papermentioning

confidence: 99%

“…[ 6 ] Such silver "nanoclusters", with just tens of metal atoms, are in a different size regime from metal nanoparticles of several to tens of nanometers dimensions that are the focus of current nanoplasmonics research. [7][8][9] Thus, beyond their current uses as biolabels and sensors, metal nanoclusters that are stabilized by such a versatile ligand as DNA, which itself can assemble into elaborate nanoscale shapes, [ 10 ] have the potential to realize metal-organic dipole, transitions into a dark state (reversible and irreversible photobleaching) and spectral jumps. [ 29 ] Another example of the strength of polarization resolved measurements is the study of Au 25 nanoclusters stabilized by bovine serum albumin (BSA).…”

Section: Introductionmentioning

confidence: 99%

Polarization Resolved Measurements of Individual DNA‐Stabilized Silver Clusters

Markešević

Oemrawsingh

Schultz

et al. 2014

Advanced Optical Materials

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hybrid materials at truly nanoscale dimensions, enabling functionality at enormously high spatial densities. [ 11,12 ] Given their nanometer size scale, such clusterbased materials may also combine desirable properties usually associated with the molecular regime, such as high fl uorescence quantum yields and large Stokes shifts, with emergent near-fi eld interactions arising from the polarizability of free electron systems, as currently exploited in surface-enhanced Raman spectroscopy [ 13 ] (SERS), and plasmonic coupling schemes with metal nanoparticles. [ 12 ] Despite the numerous Ag:DNA [ 3,[14][15][16][17][18][19] studies, little is known about the mechanism by which fl uorescent excitation and emission occur. It was previously established in the literature on small metal clusters that the excitation energies are considerably up-shifted from the particle-in-box energies, due to Coulomb interactions that lead to collective, phased oscillation of the cluster's valence electrons. [ 20,21 ] Recent experimental works [ 22,23 ] indicate that fl uorescent Ag:DNA contains a neutral silver core that is surrounded by base-bound silver ions. This arrangement is analogous to the known structure of gold clusters that are stabilized by small organic ligand molecules, [24][25][26] which possess both transitions associated with the gold core, and transitions involving charge transfer between the gold core and the surrounding ligands plus their directly attached gold atoms. [ 25,26 ] For Ag:DNAs, the specifi c mode of cluster-DNA binding is unknown, but given the existence of a neutral silver core one might expect both core-centered transitions and charge transfer transitions between the core and baseattached silver ions.In the case of such silver core-ligand transitions, small variations in the specifi c conformation of the DNA might be expected to affect directions of transition dipole moments. Thus it is of great interest to study individual Ag:DNAs under conditions that minimize environmental fl uctuations, using techniques that can probe such orientational effects.In this paper, we present single-cluster optical studies of Ag:DNAs that investigate both their response as a function of the polarization of the excitation light and the polarization of the light they emit. Single particle polarization studies have previously been used to investigate individual fl uorescent molecules, providing insight into the orientation of the emitters in the surrounding medium [ 27,28 ] as well as photophysical events of single molecules, such as rotational jumps of a single Polarization-resolved excitation and emission measurements on individual 10-15 atom silver clusters formed on DNA are presented. The emission is highly linearly polarized, typically around 90% for all emitters, whereas the polarization dependence of the excitation strongly varies from emitter to emitter. These observations support the hypothesis that the luminescence arises from collective electron oscillations along rod-shaped silver clusters, whereas the excitation ...

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Correlated Absorption and Photoluminescence of Single Gold Nanoparticles

Cited by 55 publications

References 40 publications

Single nanohole and photoluminescence: nanolocalized and wavelength tunable light source

Single nanohole and photoluminescence: nanolocalized and wavelength tunable light source

Explosive formation and dynamics of vapor nanobubbles around a continuously heated gold nanosphere

Polarization Resolved Measurements of Individual DNA‐Stabilized Silver Clusters

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