Journal ArticleDOI
Quantum-dot optical temperature probes
Glen W. Walker,Vikram C. Sundar,Christina M. Rudzinski,Aetna W. Wun,Moungi G. Bawendi,Daniel G. Nocera +5 more
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TLDR
The steady-state photoluminescence (PL) properties of cadmium selenide quantum dots (QDs) with a zinc sulfide overlayer [(CdSe)ZnS] can be strongly dependent on temperature in the range from 100 to 315 K as discussed by the authors.Abstract:
The steady-state photoluminescence (PL) properties of cadmium selenide quantum dots (QDs) with a zinc sulfide overlayer [(CdSe)ZnS] can be strongly dependent on temperature in the range from 100 to 315 K. The PL intensity from 50 to 55 A (CdSe)ZnS QDs in poly(lauryl methacrylate) matrices increases by a factor of ∼5 when the temperature is decreased from 315 to 100 K, and the peak of the emission band is blueshifted by 20 nm over the same range. The change in PL intensity is appreciable, linear, and reversible (−1.3% per °C) for temperatures close to ambient conditions. These properties of (CdSe)ZnS dots are retained in a variety of matrices including polymer and sol–gel films, and they are independent of excitation wavelength above the band gap. The significant temperature dependence of the luminescence combined with its insensitivity to oxygen quenching establishes (CdSe)ZnS dots as optical temperature indicators for temperature-sensitive coatings.read more
Citations
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Journal ArticleDOI
Luminescent probes and sensors for temperature.
TL;DR: This Review article focuses on all kinds of luminescent probes and sensors for measurement of T, and summarizes the recent progress in their design and application formats.
Journal ArticleDOI
Temperature sensing using fluorescent nanothermometers
Fiorenzo Vetrone,Rafik Naccache,Alicia Zamarrón,Ángeles Juarranz de la Fuente,Francisco Sanz-Rodríguez,Laura Martínez Maestro,Emma Martín Rodríguez,Daniel Jaque,José García Solé,John A. Capobianco +9 more
TL;DR: A novel nanothermometer, capable of accurately determining the temperature of solutions as well as biological systems such as HeLa cancer cells, is devised based on the temperature-sensitive fluorescence of NaYF(4):Er(3+),Yb(3+) nanoparticles.
Journal ArticleDOI
Thermometry at the nanoscale
Carlos D. S. Brites,Patrícia P. Lima,Nuno Silva,Ángel Millán,Vitor S. Amaral,Fernando Palacio,Luís D. Carlos +6 more
TL;DR: A general overview of recent examples of luminescent and non-luminescent thermometers working at nanometric scale and the challenges and opportunities in the development for highly sensitive ratiometric thermometers operating at the physiological temperature range with submicron spatial resolution is offered.
Journal ArticleDOI
Semiconductor quantum dots for bioanalysis.
TL;DR: Semiconductor nanoparticles, or quantum dots (QDs), have unique photophysical properties, such as size-controlled fluorescence, have high fluorescence quantum yields, and stability against photobleaching, which enable the use of QDs as optical labels for the multiplexed analysis of immunocomplexes or DNA hybridization processes.
Journal ArticleDOI
Quantum dots: bright and versatile in vitro and in vivo fluorescence imaging biosensors
K. David Wegner,Niko Hildebrandt +1 more
TL;DR: Different QD-based imaging applications will be discussed from the technological and the biological point of view, ranging from super-resolution microscopy and single-particle tracking over in vitro cell and tissue imaging to in vivo investigations.
References
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Journal ArticleDOI
(CdSe)ZnS Core-Shell Quantum Dots - Synthesis and Characterization of a Size Series of Highly Luminescent Nanocrystallites
B. O. Dabbousi,Javier Rodríguez-Viejo,F. V. Mikulec,Jason Heine,Hedi Mattoussi,R. Ober,K. F. Jensen,‡,§ and,Moungi G. Bawendi +7 more
TL;DR: In this paper, a synthesis of highly luminescent (CdSe)ZnS composite quantum dots with CdSe cores ranging in diameter from 23 to 55 A was reported.
Journal ArticleDOI
Synthesis and Characterization of Strongly Luminescing ZnS-Capped CdSe Nanocrystals
TL;DR: In this paper, the authors describe the synthesis of ZnS-capped CdSe semiconductor nanocrystals using organometallic reagents by a two-step single-flask method X-ray photoelectron spectroscopy, transmission electron microscopy and optical absorption.
Journal ArticleDOI
Electroluminescence from CdSe quantum‐dot/polymer composites
TL;DR: The electroluminescence of CdSe nanocrystallites (quantum dots) incorporated into thin films (1000 A) of polyvinyl carbazole (PVK) and an oxadiazole derivative (t‐Bu‐PBD) and sandwiched between ITO and Al electrodes was studied in this article.
Journal ArticleDOI
Photochemistry of Ru( bpy)32+. Solvent Effects
TL;DR: In this paper, a series of polypyridyl complexes of the metal-to-ligand charge-transfer (MLCT) excited state of Ru(bpy)3Z+ has been measured in a number of solvents at different temperatures.
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