TITLE

Controlling blinking in multilayered quantum dots

AUTHOR(S)
Ruimin Wang; Yanpeng Zhang; Chenli Gan; Muhammad, Javed; Min Xiao
PUB. DATE
April 2010
SOURCE
Applied Physics Letters;4/12/2010, Vol. 96 Issue 15, p151107
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The fluorescence intermittency of multilayered quantum dots (QDs) is experimentally investigated. The measured blinking statistical probabilities for QDs of different shell structures and at different excitation powers are compared with the diffusion controlled electron transfer model. The results show that the power law statistics for the “on” and “off” events depend strongly on the structure and thicknesses of the shells. Strongly suppressed blinking behavior is observed in the CdSe/CdS/ZnCdS/ZnS QDs.
ACCESSION #
49193320

 

Related Articles

  • A Single Molecule Investigation of the Photostability of Quantum Dots. Christensen, Eva Arnspang; Kulatunga, Pasad; Lagerholm, B. Christoffer; Sokolov, Igor // PLoS ONE;Aug2012, Vol. 7 Issue 8, Special section p1 

    Quantum dots (QDs) are very attractive probes for multi-color fluorescence imaging in biological applications because of their immense brightness and reported extended photostability. We report here however that single QDs, suitable for biological applications, that are subject to continuous...

  • Tunable emission based on the composite of Au nanoparticles and CdSe quantum dots deposited on elastomeric film. Chen, C. W.; Wang, C. H.; Wei, C. M.; Chen, Y. F. // Applied Physics Letters;2/16/2009, Vol. 94 Issue 7, pN.PAG 

    A simple approach to investigate the dependence of emission on the separation distance between metal nanoparticles and semiconductor quantum dots is demonstrated. Without varying the mixed concentrations, a tunable emission is achieved based on the deposition of the composite of Au nanoparticles...

  • Single particle versus ensemble average: From power-law intermittency of a single quantum dot to quasistretched exponential fluorescence decay of an ensemble. Tang, Jau; Marcus, R. A. // Journal of Chemical Physics;11/22/2005, Vol. 123 Issue 20, p204511 

    Light-induced diffusion-controlled electron transfer is proposed as an underlying mechanism for the intermittency (power law and breakdown) of a single quantum dot and ensemble-averaged fluorescence decay. The intensity decay can be approximated to a stretched exponential expression. The...

  • Diffusion-influenced reaction kinetics on fractal structures. Barzykin, A. V.; Tachiya, M. // Journal of Chemical Physics;12/15/1993, Vol. 99 Issue 12, p9591 

    A theory of diffusion-influenced geminate and pseudo-first-order bulk reactions on fractal structures is presented within the Smoluchowski framework. The formalism is based on the solution of the backward equation for the pair survival probability, generalized to noninteger dimensionality using...

  • “On”/“off” fluorescence intermittency of single semiconductor quantum dots. Kuno, M.; Fromm, D. P.; Hamann, H. F.; Gallagher, A.; Nesbitt, D. J. // Journal of Chemical Physics;7/8/2001, Vol. 115 Issue 2 

    Single molecule confocal microscopy is used to investigate the detailed kinetics of fluorescence intermittency in colloidal II–VI (CdSe) semiconductor quantum dots. Two distinct modes of behavior are observed corresponding to (i) sustained “on” episodes (τ[sub on]) of...

  • Mechanisms of fluorescence blinking in semiconductor nanocrystal quantum dots. Jau Tang; Marcus, R. A. // Journal of Chemical Physics;8/1/2005, Vol. 123 Issue 5, p054704 

    The light-induced spectral diffusion and fluorescence intermittency (blinking) of semiconductor nanocrystal quantum dots are investigated theoretically using a diffusion-controlled electron-transfer (DCET) model, where a light-induced one-dimensional diffusion process in energy space is...

  • Short-time power-law blinking statistics of single quantum dots and a test of the diffusion-controlled electron transfer model. Jau Tang; Der-Hau Lee; Yi-Cheun Yeh; Chi-Tsu Yuan // Journal of Chemical Physics;8/14/2009, Vol. 131 Issue 6, p064506 

    In this work we analyzed the blinking statistics data of single CdSe/ZnS quantum dots at vey short times to test some predictions of the diffusion-controlled electron transfer (DCET) model. Using autocorrelation function (ACF) approach we could extract the exponent of the inverse power-law...

  • Ultrafast single-electron transfer in coupled quantum dots driven by a few-cycle chirped pulse. Wen-Xing Yang; Ai-Xi Chen; Yanfeng Bai; Ray-Kuang Lee // Journal of Applied Physics;2014, Vol. 115 Issue 14, p143105-1 

    We theoretically study the ultrafast transfer of a single electron between the ground states of a coupled double quantum dot (QD) structure driven by a nonlinear chirped few-cycle laser pulse. A time-dependent Schrödinger equation without the rotating wave approximation is solved numerically....

  • Mechanism of electronic-excitation transfer in organic light-emitting devices based on semiconductor quantum dots. Vitukhnovskii, A.; Vashchenko, A.; Lebedev, V.; Vasiliev, R.; Brunkov, P.; Bychkovskii, D. // Semiconductors;Jul2013, Vol. 47 Issue 7, p971 

    The results of an experimental study of organic light-emitting diodes (LEDs) with luminescent layers based on two types of CdSe/CdS semiconductor quantum dots (QDs) with an average CdSe core diameter of 3 and 5 nm and a characteristic CdS shell thickness of 0.5 nm are presented. The dependences...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics