Surface-plasmon-assisted modal gain enhancement in Au-hybrid CdSe/ZnS nanocrystal quantum dots

Kim, Jihoon; Lee, Jaebeom; Kyhm, Kwangseuk

doi:10.1063/1.3664114

Cited by 17 publications

(12 citation statements)

References 16 publications

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“…8. 56,57 C. Time-correlated single photon counting measurements Intensity trajectories showing the emission intermittency of the spectrally integrated PL signal are oen used in single-molecule/QD spectroscopy to prove the presence of a single quantum system. For the QDs attached to the gold cones, the PL is red-shied by about 10 nm, distributed around 648 AE 11 nm, and the FWHM is slightly larger, i.e.…”

Section: B Spectroscopic Characterizationmentioning

confidence: 99%

Coupling single quantum dots to plasmonic nanocones: optical properties

Meixner

Jäger

et al. 2015

Faraday Discuss.

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Coupling a single quantum emitter, such as a fluorescent molecule or a quantum dot (QD), to a plasmonic nanostructure is an important issue in nano-optics and nano-spectroscopy, relevant for a wide range of applications, including tip-enhanced near-field optical microscopy, plasmon enhanced molecular sensing and spectroscopy, and nanophotonic amplifiers or nanolasers, to mention only a few. While the field enhancement of a sharp nanoantenna increasing the excitation rate of a very closely positioned single molecule or QD has been well investigated, the detailed physical mechanisms involved in the emission of a photon from such a system are, by far, less investigated. In one of our ongoing research projects, we try to address these issues by constructing and spectroscopically analysing geometrically simple hybrid heterostructures consisting of sharp gold cones with single quantum dots attached to the very tip apex. An important goal of this work is to tune the longitudinal plasmon resonance by adjusting the cones' geometry to the emission maximum of the core-shell CdSe/ZnS QDs at nominally 650 nm. Luminescence spectra of the bare cones, pure QDs and hybrid systems were distinguished successfully. In the next steps we will further investigate, experimentally and theoretically, the optical properties of the coupled systems in more detail, such as the fluorescence spectra, blinking statistics, and the current results on the fluorescence lifetimes, and compare them with uncoupled QDs to obtain a clearer picture of the radiative and non-radiative processes.

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Section: B Spectroscopic Characterizationmentioning

confidence: 99%

Coupling single quantum dots to plasmonic nanocones: optical properties

Meixner

Jäger

et al. 2015

Faraday Discuss.

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“…In addition to the above physical parameters, Föster resonance energy transfer (FRET) and surface plasmon affect the photoluminescence of QDs [63][64][65][66][67][68][69][70][71]. For example, CdSe/ZnS QDs placed on the surface of Ag nanoparticles show reduced photoluminescence intensity and lifetime due to efficient energy transfer from photoactivated QD to Ag nanoparticles ( Figure 1A) [70].…”

Section: Physical Methods For the Modification Of Qd Photoluminescencementioning

confidence: 99%

“…For example, CdSe/ZnS QDs placed on the surface of Ag nanoparticles show reduced photoluminescence intensity and lifetime due to efficient energy transfer from photoactivated QD to Ag nanoparticles ( Figure 1A) [70]. On the other hand, photoluminescence intensity of QDs placed on the surface of a gold nanoparticle film show up to four-fold enhancement owing to the formation of multiexciton states [71], which is similar to the twenty-fold photoluminescence enhancement reported for heterodimers composed of CdSe/ZnS QDs and gold nanoparticles separated by DNA linkers [72]. To address the energy transfer-based photoluminescence modifications in QDs, we have recorded and analyzed the photoluminescence spectrum of QDs entrapped in polymer honeycomb-network [68] or functionalized on the surface of single walled carbon nanotube (SWCNT) [69].…”

Section: Physical Methods For the Modification Of Qd Photoluminescencementioning

confidence: 99%

Photoluminescence of CdSe and CdSe/ZnS quantum dots: Modifications for making the invisible visible at ensemble and single-molecule levels

Shibu

Hamada

Nakanishi

et al. 2014

Coordination Chemistry Reviews

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This thematic article is written with an intention to provide an overview of our recent research on the modulation of quantum dots photoluminescence and the applications of quantum dots to bioimaging. In particular, we summarize the physiochemical factors that affect the photoluminescence of CdSe or CdSe/ZnS quantum dots at ensemble and single-molecule levels, blinking and blinking suppression of quantum dots, bioconjugation of quantum dots, applications of bioconjugated quantum dots for analyzing some selected biophysical processes at single-molecule levels, and intracellular delivery of quantum dot bioconjugates. These research subjects are correlated with the state of the art accomplishments in the quantum dot field.

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“…Recently, the plasmonic effect in a metallic surface has been widely studied as the method to enhance the optical signal. Surface plasmonic effect is known to enhance optical processes, such as the change in the reflective index of a molecule in a metal surface [ 39 ]. The origin of this phenomenon is attributed to the oscillation of the free conduction electrons, that is, surface plasmon (SP), induced by the interaction with the external electromagnetic field [ 40 ].…”

Section: M13 Bacteriophage Based Spr Sensor Applicationsmentioning

confidence: 99%

Recent advances in M13 bacteriophage-based optical sensing applications

Kim

Moon

2016

Nano Convergence

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Recently, M13 bacteriophage has started to be widely used as a functional nanomaterial for various electrical, chemical, or optical applications, such as battery components, photovoltaic cells, sensors, and optics. In addition, the use of M13 bacteriophage has expanded into novel research, such as exciton transporting. In these applications, the versatility of M13 phage is a result of its nontoxic, self-assembling, and specific binding properties. For these reasons, M13 phage is the most powerful candidate as a receptor for transducing chemical or optical phenomena of various analytes into electrical or optical signal. In this review, we will overview the recent progress in optical sensing applications of M13 phage. The structural and functional characters of M13 phage will be described and the recent results in optical sensing application using fluorescence, surface plasmon resonance, Förster resonance energy transfer, and surface enhanced Raman scattering will be outlined.

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Surface-plasmon-assisted modal gain enhancement in Au-hybrid CdSe/ZnS nanocrystal quantum dots

Cited by 17 publications

References 16 publications

Coupling single quantum dots to plasmonic nanocones: optical properties

Coupling single quantum dots to plasmonic nanocones: optical properties

Photoluminescence of CdSe and CdSe/ZnS quantum dots: Modifications for making the invisible visible at ensemble and single-molecule levels

Recent advances in M13 bacteriophage-based optical sensing applications

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