Join up the quantum dots

Anscombe, Nadya

doi:10.1038/nphoton.2007.100

Cited by 6 publications

(6 citation statements)

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“…If luminescence is the desired detection signal, then inorganic nanocrystals or quantum dots (QDs) are a preferred chemosensing scaffold, owing to their unique photophysical properties. − Typically, the luminescence of suitably prepared QDs is unperturbed by changes in their environment (i.e., luminescence is constant in both the presence and absence of analyte), affording a suitable framework for ratiometric sensing, which relies on signal changes relative to an internal standard to quantify the amount of analyte.…”

Section: Introductionmentioning

confidence: 99%

Metabolic Tumor Profiling with pH, Oxygen, and Glucose Chemosensors on a Quantum Dot Scaffold

et al. 2013

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Synopsis Acidity, hypoxia and glucose levels characterize the tumor microenvironment rendering pH, pO2 and pGlucose, respectively, important indicators of tumor health. To this end, understanding how these parameters change can be a powerful tool for the development of novel and effective therapeutics. We have designed optical chemosensors that feature a quantum dot and an analyte-responsive dye. These non-invasive chemosensors permit pH, oxygen, and glucose to be monitored dynamically within the tumor microenvironment by using multiphoton imaging.

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Section: Introductionmentioning

confidence: 99%

Metabolic Tumor Profiling with pH, Oxygen, and Glucose Chemosensors on a Quantum Dot Scaffold

et al. 2013

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“…Even though the site‐controlled QDs grown with this method present promising properties, so far their integration into the optical cavities of semiconductor lasers23–25 and of integrated nanocavity‐QD emitters7–9, 26 has been hindered by the excessive size, s pyr , of the pyramidal recesses (defined as the length of the side of the pyramid's facets). Indeed, prior to the present work, QD growth had been successfully achieved in pyramids with s pyr ≥ 500 nm,27, 28 which is too large for most applications.…”

Section: Introductionmentioning

confidence: 99%

Site‐Controlled InGaAs Quantum Dots with Tunable Emission Energy

Felici

Gallo

Mohan

et al. 2009

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Semiconductor quantum-dot (QD) systems offering perfect site control and tunable emission energy are essential for numerous nanophotonic device applications involving spatial and spectral matching of dots with optical cavities. Herein, the properties of ordered InGaAs/GaAs QDs grown by organometallic chemical vapor deposition on substrates patterned with pyramidal recesses are reported. The seeded growth of a single QD inside each pyramid results in near-perfect (<10 nm) control of the QD position. Moreover, efficient and uniform photoluminescence (inhomogeneous broadening <10 meV) is observed from ordered arrays of such dots. The QD emission energy can be finely tuned by varying 1) the pyramid size and 2) its position within specific patterns. This tunability is brought about by the patterning of both the chemical properties and the surface curvature features of the substrate, which allows local control of the adatom fluxes that determine the QD thickness and composition.

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Section: Introductionmentioning

confidence: 99%

“…The recent intense interest in semiconductor nanocrystalline quantum dots (QDs) stems from the fascinating optical properties exhibited by these systems, most notably their size-tunable absorption and emission. QDs have been investigated for numerous applications including lasing media, [1][2][3][4] biolabeling, [5][6][7] solar cells, [8][9][10] and quantum information storage. [11][12][13] One interesting property of QDs is the observation of fluorescence intermittency or blinking, 14 which can be understood in terms of surface defects or trap states.…”

Section: Introductionmentioning

confidence: 99%

Three-Pulse Photon Echo Peak Shift Measurements of Capped CdSe Quantum Dots

et al. 2009

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In this article, the results of femtosecond three-pulse photon echo peak shift (3-PEPS) measurements are reported for a series of cadmium selenide core−shell semiconductor nanocrystals. The peak shift data were found to be highly dependent on the shell compositions and particle morphologies. The static inhomogeneity parameter was found to vary from 10 cm−1 for highly isotropic particles to 170 cm−1 for particles with a broad size distribution. We also discuss the high-frequency (≈212 cm−1) longitudinal optical (LO) phonon and the low-frequency (≈13−19 cm−1) longitudinal acoustic (LA) phonon modes (ω00) and how the damping times and frequencies also depend on the choice of capping material.

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Join up the quantum dots

Cited by 6 publications

References 0 publications

Metabolic Tumor Profiling with pH, Oxygen, and Glucose Chemosensors on a Quantum Dot Scaffold

Metabolic Tumor Profiling with pH, Oxygen, and Glucose Chemosensors on a Quantum Dot Scaffold

Site‐Controlled InGaAs Quantum Dots with Tunable Emission Energy

Three-Pulse Photon Echo Peak Shift Measurements of Capped CdSe Quantum Dots

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