Directed Energy Transfer in Films of CdSe Quantum Dots: Beyond the Point Dipole Approximation

2014 ◽  
Vol 136 (17) ◽  
pp. 6259-6268 ◽  
Author(s):  
Kaibo Zheng ◽  
Karel Žídek ◽  
Mohamed Abdellah ◽  
Nan Zhu ◽  
Pavel Chábera ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Dipole Approximation ◽  
Cdse Quantum Dots ◽  
Point Dipole ◽  
Point Dipole Approximation ◽  
Directed Energy

Origin of Size-Dependent Energy Transfer from Photoexcited CdSe Quantum Dots to Gold Nanoparticles

2008 ◽  
Vol 112 (17) ◽  
pp. 6695-6699 ◽  
Author(s):  
Mariana Kondon ◽  
Junhyung Kim ◽  
Nayane Udawatte ◽  
Dongil Lee
Keyword(s):  
Quantum Dots ◽  
Gold Nanoparticles ◽  
Energy Transfer ◽  
Cdse Quantum Dots ◽  
Size Dependent

NEW FORMULATION FOR NON-EQUILIBRIUM SOLVATION: SPECTRAL SHIFTS AND CAVITY RADII OF 6-PROPANOYL-2-(N,N-DIMETHYLAMINO) NAPHTHALENE AND 4-(N,N-DIMETHYLAMINO) BENZONITRILE

2006 ◽  
Vol 05 (spec01) ◽  
pp. 355-374 ◽  
Author(s):  
YAO HUANG ◽  
XIANG-YUAN LI ◽  
KE-XIANG FU ◽  
QUAN ZHU
Keyword(s):  
Density Functional ◽  
Multipole Expansion ◽  
Dipole Approximation ◽  
Point Dipole ◽  
Functional Theory ◽  
Spectral Shifts ◽  
Point Dipole Approximation ◽  
Accessible Surface ◽  
New Formulation ◽  
Solvent Accessible Surface

In the present work, the new formulations describing spectral shifts by the authors have been introduced and employed to investigate two dye molecules, 6-propanoyl-2-(N,N-dimethylamino) naphthalene and 4-(N,N-dimethylamino) benzonitrile. From the viewpoints of the authors, the cavity radii were overestimated owing to the errors existing in the traditional models. Slightly differing from the results by other authors in the past, this work fits the cavity radii to the values of ~4.5 Å for 6-propanoyl-2-(N,N-dimethylamino) naphthalene and ~3.2 Å for 4-(N,N-dimethylamino) benzonitrile. In the fittings, both point dipole approximation and multipole expansion methods are employed. The calculations of the excited states are performed by means of the time-dependent density functional theory. Comparing the fitted cavity radii from the experimental spectra with those estimated from the molecular volumes by some well-known procedures such as COSMO and PCM, we find that the new formulations give fairly satisfactory results. By taking an atomic ion as an example, the authors argue that the Onsager radii recommended by some popular procedures are greatly exaggerated. The cavity radius derived simply from the volume encompassed by the solvent-accessible surface, without any addition of other parts, is suggested for application.

scholarly journals Tunable energy transfer efficiency based on the composite of mixed CdSe quantum dots and elastomeric film

2008 ◽  
Vol 92 (5) ◽  
pp. 051906 ◽  
Author(s):  
C. W. Chen ◽  
C. H. Wang ◽  
Y. F. Chen ◽  
C. W. Lai ◽  
P. T. Chou
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Energy Transfer Efficiency ◽  
Transfer Efficiency ◽  
Cdse Quantum Dots

Direct Simulation of Electrorheological Suspensions

2004 ◽  
Author(s):  
Pushpendra Singh ◽  
Nadine Aubry
Keyword(s):  
Stress Tensor ◽  
Electric Fields ◽  
Electrostatic Force ◽  
Dipole Approximation ◽  
Point Dipole ◽  
Maxwell Stress ◽  
Particle Interactions ◽  
Maxwell Stress Tensor ◽  
Point Dipole Approximation ◽  
Electrorheological Suspensions

A numerical scheme based on the distributed Lagrange multiplier method (DLM) is used to study the motion of particles of a dielectric suspensions subjected to uniform and nonuniform electric fields. The Maxwell stress tensor method is used for computing electrostatic forces. In the point dipole approximation the total electrostatic force acting on a particle can be divided into two distinct contributions, one due to dielectrophoresis and the second due to particle-particle interactions. The former is zero when the applied electric field is uniform and the latter depends on the distance between the particles. In the Maxwell stress tensor approach these two contribution appear together. Simulations show that as expected the error in the point dipole approximation decreases, as the distance between the particles increases.

scholarly journals Enhancing the efficiency of a dye sensitized solar cell due to the energy transfer between CdSe quantum dots and a designed squaraine dye

RSC Advances ◽  
2012 ◽  
Vol 2 (7) ◽  
pp. 2748 ◽  
Author(s):  
Lioz Etgar ◽  
Jinhyung Park ◽  
Claudia Barolo ◽  
Vladimir Lesnyak ◽  
Subhendu K. Panda ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Solar Cell ◽  
Dye Sensitized Solar Cell ◽  
Cdse Quantum Dots ◽  
Dye Sensitized ◽  
Squaraine Dye

scholarly journals Direct Observation of Electron-to-Hole Energy Transfer in CdSe Quantum Dots

2006 ◽  
Vol 96 (5) ◽  
Author(s):  
E. Hendry ◽  
M. Koeberg ◽  
F. Wang ◽  
H. Zhang ◽  
C. de Mello Donegá ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Direct Observation ◽  
Cdse Quantum Dots ◽  
Hole Energy
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