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Universal emission intermittency in quantum dots, nanorods and nanowires

Frantsuzov, Pavel and Kuno, Masaru and Jankó, Boldizsár and Marcus, Rudolph A. (2008) Universal emission intermittency in quantum dots, nanorods and nanowires. Nature Physics, 4 (7). pp. 519-522. ISSN 1745-2473.

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Virtually all known fluorophores exhibit mysterious episodes of emission intermittency. A remarkable feature of the phenomenon is a power-law distribution of on- and off-times observed in colloidal semiconductor quantum dots, nanorods, nanowires and some organic dyes. For nanoparticles, the resulting power law extends over an extraordinarily wide dynamic range: nine orders of magnitude in probability density and five to six orders of magnitude in time. Exponents hover about the ubiquitous value of -3/2. Dark states routinely last for tens of seconds—practically forever on quantum mechanical timescales. Despite such infinite states of darkness, the dots miraculously recover and start emitting again. Although the underlying mechanism responsible for this phenomenon remains a mystery and many questions persist, we argue that substantial theoretical progress has been made.

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Marcus, Rudolph A.0000-0001-6547-1469
Additional Information:© 2008 Macmillan Publishers Limited. Received 20 March 2008; Accepted 27 May 2008. The authors would like to acknowledge the support of NSF, ONR and DOE-BES.
Funding AgencyGrant Number
Office of Naval Research (ONR)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Issue or Number:7
Record Number:CaltechAUTHORS:20150316-162909140
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55821
Deposited By: George Porter
Deposited On:16 Mar 2015 23:45
Last Modified:22 Nov 2019 09:58

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