Size dependence of tetrahedral bond lengths in CdSe nanocrystals

2007 ◽  
Vol 90 (16) ◽  
pp. 161911 ◽  
Author(s):  
Pin-Jiun Wu ◽  
Yuri P. Stetsko ◽  
Ku-Ding Tsuei ◽  
Roman Dronyak ◽  
Keng S. Liang
Keyword(s):  
Size Dependence ◽  
Cdse Nanocrystals ◽  
Bond Lengths ◽  
Tetrahedral Bond

Lattice parameters of Zn1−xMnxSe and tetrahedral bond lengths in AII1−xMnxBVIalloys

1985 ◽  
Vol 58 (11) ◽  
pp. 4056-4060 ◽  
Author(s):  
D. R. Yoder‐Short ◽  
U. Debska ◽  
J. K. Furdyna
Keyword(s):  
Lattice Parameters ◽  
Bond Lengths ◽  
Tetrahedral Bond

Dependence of Tetrahedral Bond Lengths on the Surface Passivation and Stacking-Fault Density of CdSe Nanocrystals

2019 ◽  
Vol 57 ◽  
pp. 58-67
Author(s):  
Pin Jiun Wu ◽  
Yuri P. Stetsko ◽  
Meng Ting Hsieh
Keyword(s):  
Surface Passivation ◽  
Surface Effect ◽  
Stacking Faults ◽  
Expansion Ratio ◽  
Cdse Nanocrystals ◽  
Size Dependent ◽  
Dependent Behavior ◽  
Tetrahedral Bond ◽  
Organic Capping ◽  
Capping Ligands

We have investigated the surface effect of colloidally prepared CdSe nanocrystals (NCs) with the size range of 23-40 Å on their structural properties by changing the organic capping ligands. The TOPO/HDA-passivated NCs reveal a size-dependent behavior involving an elongated axial bondR(1)of an atomic tetrahedron and a shrunken equatorial bondsR(2). After treatment of the NCs with pyridine, the bond lengthR(1)decreases significantly whereasR(2)remains unchanged relative to the TOPO/HDA-passivated NCs, suggesting that a tensile stress along the [001] direction is contributed from the surface modification. In addition, we find that the expansion ratio of the pyridine-treated NCs along the c axis depends strongly on the density of stacking faults, which provides an evidence for the relaxation of atomic positions near the interface of stacking faults.

Dihedral Angles of the Cycloheptane Ring

1988 ◽  
Vol 41 (7) ◽  
pp. 1139 ◽  
Author(s):  
GA Bottomley
Keyword(s):  
Membered Ring ◽  
Dihedral Angles ◽  
Bond Angles ◽  
Bond Lengths ◽  
Tetrahedral Bond

A method is described for calculating sets of dihedral angles in a seven- membered ring with equal tetrahedral bond angles and equal bond lengths. Representative values are given for the separate chair and boat manifolds of solutions.

Size Dependence of Second Harmonic Generation in Cdse Nanocrystals

1999 ◽  
Vol 571 ◽  
Author(s):  
M. Jacobsohn ◽  
U. Banin
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Rayleigh Scattering ◽  
Size Dependence ◽  
Second Harmonic ◽  
Particle Surface ◽  
Harmonic Coefficient ◽  
Cdse Nanocrystals ◽  
Generation Process ◽  
Nanocrystal Quantum Dots

ABSTRACTSecond Harmonic Generation in CdSe nanocrystal quantum dots is observed by Hyper-Rayleigh scattering. We use a Ti-Sapphire femtosecond laser at 820 nm to induce the nonlinear optical response of the nanocrystals in solution. The unit cell normalized second harmonic coefficient βn, shows a substantial systematic enhancement in small sizes. The observed size dependence of the second harmonic generation process, is explained assuming two contributions. The first is a bulk-like contribution, from the non-centrosymmetric nanocrystal core, and the second, a contribution from the particle surface. The latter contribution is most significant in small nanocrystals with a substantial proportion of surface atoms.

Size dependence of acoustic and optical vibrational modes of CdSe nanocrystals in glasses

1996 ◽  
Vol 197 (2-3) ◽  
pp. 238-246 ◽  
Author(s):  
L. Saviot ◽  
B. Champagnon ◽  
E. Duval ◽  
I.A. Kudriavtsev ◽  
A.I. Ekimov
Keyword(s):  
Size Dependence ◽  
Cdse Nanocrystals ◽  
Vibrational Modes

Size Dependence of Negative Trion Auger Recombination in Photodoped CdSe Nanocrystals

Nano Letters ◽  
2013 ◽  
Vol 14 (1) ◽  
pp. 353-358 ◽  
Author(s):  
Alicia W. Cohn ◽  
Jeffrey D. Rinehart ◽  
Alina M. Schimpf ◽  
Amanda L. Weaver ◽  
Daniel R. Gamelin
Keyword(s):  
Size Dependence ◽  
Auger Recombination ◽  
Cdse Nanocrystals

Quantum size dependence of femtosecond electronic dephasing and vibrational dynamics in CdSe nanocrystals

1994 ◽  
Vol 49 (20) ◽  
pp. 14435-14447 ◽  
Author(s):  
D. M. Mittleman ◽  
R. W. Schoenlein ◽  
J. J. Shiang ◽  
V. L. Colvin ◽  
A. P. Alivisatos ◽  
...  
Keyword(s):  
Size Dependence ◽  
Cdse Nanocrystals ◽  
Vibrational Dynamics ◽  
Quantum Size ◽  
Electronic Dephasing
Sign in / Sign up

Export Citation Format

Share Document