Journal ArticleDOI
Blinking statistics in single semiconductor nanocrystal quantum dots
Ken T. Shimizu,Robert Neuhauser,C. A. Leatherdale,S. A. Empedocles,Wing-Keung Woo,Moungi G. Bawendi +5 more
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TLDR
In this article, a dynamic model of tunneling between core and trapped charged states is proposed to explain the universal power-law statistics of the blinking events observed in single CdSe nanocrystal quantum dots (QD's).Abstract:
Statistical studies of fluorescence intermittency in single CdSe nanocrystal quantum dots (QD's) reveal a temperature-independent power-law distribution in the histogram of on and off times---the time periods before the QD turns from emitting to nonemitting (bright to dark) and vice versa. Every QD shows a similar power-law behavior for the off-time distribution regardless of temperature, excitation intensity, surface morphology or size. We propose a dynamic model of tunneling between core and trapped charged states to explain the universal power-law statistics of the blinking events observed. The on-time probability distributions show evidence of both a tunneling mechanism similar to the off-time statistics and a secondary, photoinduced process that leads to a truncation of the power law. The same blinking statistics are also observed for single CdTe nanocrystal QD's.read more
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Journal ArticleDOI
The restaurant at the end of the random walk: recent developments in the description of anomalous transport by fractional dynamics
Ralf Metzler,Joseph Klafter +1 more
TL;DR: Fractional dynamics has experienced a firm upswing during the past few years, having been forged into a mature framework in the theory of stochastic processes as mentioned in this paper, and a large number of research papers developing fractional dynamics further, or applying it to various systems have appeared since our first review article on the fractional Fokker-Planck equation.
Journal ArticleDOI
Towards non-blinking colloidal quantum dots.
Benoit Mahler,Piernicola Spinicelli,Stéphanie Buil,Xavier Quélin,J.-P. Hermier,J.-P. Hermier,Benoit Dubertret +6 more
TL;DR: Novel CdSe-CdS core-shell quantum dots with thick crystalline shells with 68% of which do not blink when observed individually at 33 Hz for 5 min are synthesized, establishing a direct correlation between shell thickness and blinking occurrences.
Journal ArticleDOI
Spectroscopic and Device Aspects of Nanocrystal Quantum Dots
Jeffrey M. Pietryga,Young-Shin Park,Young-Shin Park,Jaehoon Lim,Andrew F. Fidler,Wan Ki Bae,Sergio Brovelli,Victor I. Klimov +7 more
TL;DR: Recent advances in nanocrystal research related to applications of QD materials in lasing, light-emitting diodes (LEDs), and solar energy conversion are examined.
Journal ArticleDOI
Non-blinking semiconductor nanocrystals
Xiaoyong Wang,Xiaofan Ren,Keith B. Kahen,Megan A. Hahn,Manju Rajeswaran,Sara Maccagnano-Zacher,John Silcox,George E. Cragg,Alexander L. Efros,Todd D. Krauss +9 more
TL;DR: As photoluminescence blinking severely limits the usefulness of nanocry crystals in applications requiring a continuous output of single photons, these non-blinking nanocrystals may enable substantial advances in fields ranging from single-molecule biological labelling to low-threshold lasers.
Journal ArticleDOI
Universal emission intermittency in quantum dots, nanorods and nanowires
TL;DR: In this article, a power-law distribution of on-and off-times observed in colloidal semiconductor quantum dots, nanorods, nanowires and some organic dyes is discussed.
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