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Effect of shell thickness and composition on blinking suppression and the blinking mechanism in 'giant' CdSe/CdS nanocrystal quantum dots

Javier Vela, Han Htoon, Yongfen Chen, Young-Shin Park, Yagnaseni Ghosh, Peter M. Goodwin, James H. Werner, Nathan P. Wells, Joanna L. Casson, Jennifer A. Hollingsworth
2010 Journal of Biophotonics  
Suppressed blinking behaviour afforded by this class of semiconductor nanocrystal yields new statistical relationships in the probability densities of fluorescence on-and off-time distributions (right)  ...  We clarify the dependence of blinking behavior and photostability on shell thickness, as well as on interrogation times.  ...  Acknowledgments This work was conducted in part in the Center for Integrated Nanotechnologies (CINT) jointly operated by Los Alamos and Sandia National Laboratories (LANL and SNL) for the U.S.  ... 
doi:10.1002/jbio.201000058 pmid:20626004 pmcid:PMC2943988 fatcat:zdabx43eurgubc4tlqpryhwqn4

Correlated blinking of fluorescent emitters mediated by single plasmons

D. Bouchet, E. Lhuillier, S. Ithurria, A. Gulinatti, I. Rech, R. Carminati, Y. De Wilde, V. Krachmalnicoff
2017 Physical Review A  
Single-plasmons are created on the latter from the quantum dot, and transfer energy to excite in turn the fluorescent nanobead.  ...  In this Letter we report on a first crucial step towards this goal by the observation of correlated emission between a single CdSe/CdS/ZnS quantum dot exhibiting single photon statistics and a fluorescent  ...  For the growth of the CdS shell, A SILAR method is used, where we successively introduce precursor for Cd and S. 4 mL of the previous solution of CdSe core are mixed with 16 mL of octadecene and 10 mL  ... 
doi:10.1103/physreva.95.033828 fatcat:ea6sng4hijertgj6nejqstcmme

Influence of the Inner-Shell Architecture on Quantum Yield and Blinking Dynamics in Core/Multishell Quantum Dots

Pooja Bajwa, Feng Gao, Anh Nguyen, Benard Omogo, Colin D. Heyes
2016 ChemPhysChem  
However, this introduces multiple interfaces and their relative effects on quantum yield and blinking are not yet fully understood.  ...  Choosing the composition of the shell for QDs is not trivial, since both the band-edge energy offset and interfacial lattice mismatch play roles in influencing the final optical properties.  ...  Acknowledgments Generous financial support by the NSF (CHE-1255440), the NIH (COBRE P30 GM103450), and the Arkansas Biosciences Institute is gratefully acknowledged.  ... 
doi:10.1002/cphc.201500868 pmid:26693950 pmcid:PMC5086001 fatcat:dgrvr5k3hbblpbdt4i2bbbjfoi

Midazolam effects on prepulse inhibition of the acoustic blink reflex

Hartmut Schächinger, Beatrice U. Müller, Werner Strobel, Wolf Langewitz, Rudolf Ritz
1999 British Journal of Clinical Pharmacology  
This relationship was described by a sigmoidal E max model, giving an E max of 0.65±0.13, an ED 50 of 33.9±10.9 ng ml −1 and gamma of 3.5±1.0.  ...  The magnitude of PPI was calculated by dividing the EMG response to nonprepulsed stimuli by the response to prepulsed stimuli for each individual and period.  ...  has been found to reduce PPI in animal research [26] . and critical review of the manuscript. Other sedatives, such as ethanol, did not impact PPI [27].  ... 
doi:10.1046/j.1365-2125.1999.00896.x pmid:10233207 pmcid:PMC2014234 fatcat:xt7up3rbnveo3glrylcaiebizy

All-optical fluorescence blinking control in quantum dots with ultrafast mid-infrared pulses [article]

Jiaojian Shi, Weiwei Sun, Hendrik Utzat, Ardavan Farahvash, Frank Y. Gao, Zhuquan Zhang, Ulugbek Barotov, Adam P. Willard, Keith A. Nelson, Moungi G. Bawendi
2021 arXiv   pre-print
Despite efforts for blinking reduction via chemical engineering of the QD architecture and its environment, blinking still poses barriers to the application of QDs, particularly in single-particle tracking  ...  Here, we demonstrate the first deterministic all-optical suppression of quantum dot blinking using a compound technique of visible and mid-infrared (MIR) excitation.  ...  The blinking OFF-time distribution is almost unaffected in 14 ML QDs, while the ON-time distribution is altered at 1 second and at its harmonics, contrary to the nearly unaffected ON-time distribution  ... 
arXiv:2105.01190v1 fatcat:7djzsiaomraxrm746i44zhws4u

Reduced Blinking and Long-Lasting Fluorescence of Single Fluorophores Coupling to Silver Nanoparticles

Yi Fu, Jian Zhang, Joseph R. Lakowicz
2008 Langmuir  
A power-law distribution of off time population was observed for single Cy5 molecules.  ...  The blinking behavior of single Cy5 molecules was investigated and compared in the absence and the presence of silver nanostructures.  ...  Acknowledgments This work was supported by the NCRR, RR-08119 and NHGRI, HG-002655, EB000682, EB0065211 and NIBIB.  ... 
doi:10.1021/la702673p pmid:18278953 pmcid:PMC2730019 fatcat:n3amwbfr5za4lpybaeesxfvsmy

Compact high-quality CdSe–CdS core–shell nanocrystals with narrow emission linewidths and suppressed blinking

Ou Chen, Jing Zhao, Vikash P. Chauhan, Jian Cui, Cliff Wong, Daniel K. Harris, He Wei, Hee-Sun Han, Dai Fukumura, Rakesh K. Jain, Moungi G. Bawendi
2013 Nature Materials  
High particle uniformity, high photoluminescence quantum yields, narrow and symmetric emission spectral lineshapes and minimal single dot emission intermittency (known as blinking) have been recognized  ...  We anticipate that this new generation of QDs will also result in significant improvement in the performance of QDs in other applications such as solid-state lighting and illumination. .  ...  Acknowledgements The work received support from the NIH through grants 5-U54-CA119349 (M.G.B.) and 5R01CA126642 (M.G.B., D.F., R. J.), the ARO through the Institute for Soldier Nanotechnologies  ... 
doi:10.1038/nmat3539 pmid:23377294 pmcid:PMC3677691 fatcat:kycgyp33wjgbzgezh45mdojagy

Pump-Intensity- and Shell-Thickness-Dependent Evolution of Photoluminescence Blinking in Individual Core/Shell CdSe/CdS Nanocrystals

Anton V. Malko, Young-Shin Park, Siddharth Sampat, Christophe Galland, Javier Vela, Yongfen Chen, Jennifer A. Hollingsworth, Victor I. Klimov, Han Htoon
2011 Nano letters (Print)  
We show that while at low pump intensities PL blinking in thin-shell (4À7 monolayers, MLs) NQDs can be described by random switching between two states of high (ON) and low (OFF) emissivities, it changes  ...  Further, our data indicate that highly stable, blinking-free PL of thick-shell (15À19 MLs) NQDs ("giant" or g-NQDs) is characterized by nearly perfect Poisson statistics, corresponding to a narrow, shot-noise  ...  In the case of the thickest shells (15À19 MLs), blinking-free PL with a narrow distribution of intensities is observed for all pump fluencies.  ... 
doi:10.1021/nl2025272 pmid:22098269 pmcid:PMC3392898 fatcat:xsnkreivnjd7rlqjsyqeqwhax4

Two types of luminescence blinking revealed by spectroelectrochemistry of single quantum dots

Christophe Galland, Yagnaseni Ghosh, Andrea Steinbrück, Milan Sykora, Jennifer A. Hollingsworth, Victor I. Klimov, Han Htoon
2011 Nature  
binning time, binary blinking is observed. d, For fluctuations much faster than the bin size, a continuous distribution of intensities and lifetimes is obtained, often referred to as flickering.  ...  A convenient tool for the analysis of correlations between photoluminescence intensities and lifetimes is a fluorescence lifetime-intensity distribution (FLID) representation.  ...  To illustrate the variability in blinking behaviours, we present the data collected for this nanocrystal on two different days.  ... 
doi:10.1038/nature10569 pmid:22071764 pmcid:PMC3390028 fatcat:kobxxsdmqfhlddbyz62zweswwy

In Vitro Spoilation of Silicone-Hydrogel Soft Contact Lenses in a Model-Blink Cell

Cheng-Chun Peng, Neil P. Fajardo, Trust Razunguzwa, Clayton J. Radke
2015 Optometry and Vision Science  
The model-blink cell provides a reliable laboratory tool for screening new antifouling lens materials, surface coatings, and care solutions.  ...  Fouled deposits appear on the lenses after cycling, and their compositions and spatial distributions are subsequently analyzed by optical microscopy, laser ablation electrospray ionization mass spectrometry  ...  We thank Colin Cerretani for discussion, Rachel Segalman for use of the optical microscope, Tatiana Svitova for the design of the lipid-extraction experiment, and David Liu for conducting FCSLM.  ... 
doi:10.1097/opx.0000000000000625 pmid:26083462 fatcat:wacjs6ushfeppbx6k3zw24ygim

On/off blinking and switching behaviour of single molecules of green fluorescent protein

Robert M. Dickson, Andrew B. Cubitt, Roger Y. Tsien, W. E. Moerner
1997 Nature  
These conjectures are supported by our infrared spectra and by analogy with the porphyrin system 1 .  ...  As the {½WZnRu III 2 ðOHÞðH 2 OÞÿðZnW 9 O 34 Þ 2 } 11 Ϫ compound is only catalytically active after a long induction period, we propose slow formation of a ruthenium(IV)-oxo species, followed by fast reaction  ...  Sorokin for the sample of 1,3-adamantane-d2. This work was supported Acknowledgements. We thank L. S. B. Goldstein and S. Kummer for discussions. This work was supported by the NSF.  ... 
doi:10.1038/41048 pmid:9237752 fatcat:ih5mkdm6jrf2hjbk4ot4z4tzxa

Charge-tunnelling and self-trapping: common origins for blinking, grey-state emission and photoluminescence enhancement in semiconductor quantum dots

M. A. Osborne, A. A. E. Fisher
2016 Nanoscale  
Modelling quantum dot blinking, grey-states and photoluminescence enhancement within a charge-tunnelling and self-trapping description of exciton-carrier dynamics.  ...  For a typical ZnS shell of 2 monolayers (ML) and lattice spacing 0.31 nm, R s = 2.62 nm and the hole trapping probability, p = 0.2, compares favorably with models elsewhere. 20 Blinking statistics generated  ...  transition that occurs after this time in a probabilistic manner and is particularly suited to the highly distributed kinetics of QD blinking, where on-and off-states can persist for long periods >10  ... 
doi:10.1039/c6nr00529b pmid:27088542 fatcat:esszdhynu5ekbczfvby7unyosq

Determination of molecular stoichiometry without reference samples by analyzing fluorescence blinking with and without excitation synchronization

Heike Hevekerl, Jerker Widengren
2015 Methods and Applications in Fluorescence  
The fluorescence blinking is measured under two different excitation regimes, on the 2 same setup, and in one and the same sample.  ...  Moreover, for quantitative fluorescence studies, it is often useful to know the number of fluorophores labeled onto the molecules studied.  ...  F t F t F t F t F F t F t F F t F t F F F t F t F G Here, < > brackets denote time average, and G fast () signifies the part of the correlation function originating from the photophysically generated  ... 
doi:10.1088/2050-6120/3/2/025001 pmid:29148486 fatcat:3wqreu653nhyzdi6b3pm5rpskm

Effects of subthalamic deep brain stimulation on blink abnormalities of 6-OHDA lesioned rats

Jaime Kaminer, Pratibha Thakur, Craig Evinger
2015 Journal of Neurophysiology  
These data show that the 6-OHDA lesioned rat is an ideal model system for investigating the neural bases of reflex abnormalities in PD and highlight the complexity of PD's effects on motor control, by  ...  At 130 Hz, but not 16 Hz, STN DBS eliminates reflex blink hyperexcitability and restores both short-and long-term blink plasticity.  ...  G: mean peak power of the fast Fourier transform of the autocorrelation of blink occurrence for normal data (black bar) and shuffled data (open bar) for Control and 6-OHDA lesioned rats with and without  ... 
doi:10.1152/jn.01072.2014 pmid:25673748 pmcid:PMC4455559 fatcat:ibyaphhkd5empb5ej5jq6oxjfi

Biexciton Quantum Yield Heterogeneities in Single CdSe (CdS) Core (Shell) Nanocrystals and Its Correlation to Exciton Blinking

Jing Zhao, Ou Chen, David B. Strasfeld, Moungi G. Bawendi
2012 Nano letters (Print)  
More specifically, we measure the photoluminescence blinking and BX quantum yields (QYs) and study the correlation between these two measurements for single core (shell) CdSe (CdS) nanocrystals (NCs).  ...  To explain our results, we propose a model that combines both trapping and an Auger mechanism for BX recombination.  ...  (a-b) Blinking "on" time fraction distribution for QD593 (a) and QD624 (b).  ... 
doi:10.1021/nl3013727 pmid:22871126 pmcid:PMC3482465 fatcat:rwwuperxlrcrjlrldgau33oe7m
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