Journal ArticleDOI
Electronic Energy Transfer in CdSe Quantum Dot Solids
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TLDR
Electronic energy transfer between close packed quantum dots using cw and time resolved photoluminescence is demonstrated and is consistent with long-range resonance transfer of electronic excitations from the more electronically confined states of the small dots to the higher excitedStates of the large dots.Abstract:
We demonstrate electronic energy transfer between close packed quantum dots using cw and time resolved photoluminescence. Optically clear and thin, close packed quantum dot solids were prepared from mixtures of small and large CdSe quantum dots (38.5 and 62 \AA{}, $\ensuremath{\sigma}l4.5%$). Quenching of the luminescence (lifetime) of the small dots accompanied by enhancement of the luminescence (lifetime) of the large dots is consistent with long-range resonance transfer of electronic excitations from the more electronically confined states of the small dots to the higher excited states of the large dots.read more
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Journal ArticleDOI
Green-to-Blue Triplet Fusion Upconversion Sensitized by Anisotropic CdSe Nanoplatelets
TL;DR: Green-to-blue photon upconversion bears great potential in photocatalytic applications as discussed by the authors, but the size of the CdSe nanocrystals is not optimal.
Journal ArticleDOI
pH Dependent Optical Switching and Fluorescence Modulation of Molybdenum Sulfide Quantum Dots
Himanshu Mishra,Sima Umrao,Jai Singh,Rajesh K. Srivastava,Rashid Ali,Arvind Misra,Anchal Srivastava +6 more
TL;DR: In this article, the authors reported an easy and eco-friendly hydrothermal route for the synthesis of pH dependent fluorescent MoS2 quantum dots (MoS2-QDs).
Journal ArticleDOI
Photon antibunching in a cluster of giant CdSe/CdS nanocrystals.
Bihu Lv,Huichao Zhang,Huichao Zhang,Lipeng Wang,Chunfeng Zhang,Xiaoyong Wang,Jiayu Zhang,Min Xiao,Min Xiao +8 more
TL;DR: It is demonstrated that nanocrystals within small clusters can electronically couple, thereby increasing their optical cross-section while the optical emission remains antibunched.
Journal ArticleDOI
Electrochemical Charging of CdSe Quantum Dots: Effects of Adsorption versus Intercalation
TL;DR: Two different modes of electrochemical double-layer charging in CdSe QDs are reported and their effects on the electronic and optical properties are reported, showing that the charging mechanism at the interface involves cation intercalation for smaller ions and cation adsorption for larger bulky ions.
Journal ArticleDOI
Cooperative Near‐Field Surface Plasmon Enhanced Quantum Dot Nanoarrays
Kirsty Leong,Yeechi Chen,David J. Masiello,Melvin T. Zin,Marketa Hnilova,Hong Ma,Candan Tamerler,Mehmet Sarikaya,David S. Ginger,Alex K.-Y. Jen +9 more
TL;DR: In this article, a 15-fold increase in the brightness of quantum dots was observed due to plasmon-enhanced fluorescence using engineered peptides as binding agents, which was achieved by systematically tuning the vertical distance of the QD from the gold nanoparticles using solid-specific peptide linkers.