Confined-but-Connected Quantum Solids via Controlled Ligand Displacement

Nano Letters ◽  
2013 ◽  
Vol 13 (7) ◽  
pp. 3225-3231 ◽  
Author(s):  
William J. Baumgardner ◽  
Kevin Whitham ◽  
Tobias Hanrath
Keyword(s):  
Quantum Solids ◽  
Ligand Displacement

scholarly journals Comparative studies on peptides representing the so-called tachykinin-like region of the Alzheimer Aβ peptide [Aβ(25–35)]

1998 ◽  
Vol 336 (2) ◽  
pp. 419-427 ◽  
Author(s):  
Omar M. A. EL-AGNAF ◽  
G. Brent IRVINE ◽  
Geraldine FITZPATRICK ◽  
W. Kenneth GLASS ◽  
David J. S. GUTHRIE
Keyword(s):  
Electron Microscopy ◽  
Ligand Binding ◽  
Comparative Studies ◽  
Aβ Peptide ◽  
Amyloid Protein ◽  
Binding Studies ◽  
Nk1 Receptors ◽  
Ligand Displacement ◽  
Β Amyloid

In an attempt to answer the question of whether or not the so-called tachykinin-like region of the Alzheimer β-amyloid protein [Aβ(25–35)] can act as a tachykinin, the sequences Aβ(25–35), Aβ(25–35)amide and their norleucine-35 and phenylalanine-31 analogues were synthesized. These peptides were examined with ligand binding studies, electron microscopy, CD and NMR. In all cases some differences were found between the Aβ(25–35) analogue and the corresponding Phe31 peptide. In addition, in ligand displacement studies on tachykinin NK1 receptors, only the Phe31 analogue showed activity comparable to that of genuine tachykinins. We conclude that peptides based on Aβ(25–35) but with a Phe residue at position 31 do display properties typical of a tachykinin, but that peptides with Ile at this position do not.

scholarly journals Kinetics of ligand displacement from the Mn(acac)3 complex

1983 ◽  
Vol 23 (1-2) ◽  
pp. 149-152
Author(s):  
A. K. Bhattacharjee ◽  
M. K. Mahanti
Keyword(s):  
Ligand Displacement ◽  
Kinetics Of

Ligand Displacement and Oxidation Reactions of Methyl(oxo)rhenium(V) Complexes

2004 ◽  
Vol 43 (13) ◽  
pp. 3854-3862 ◽  
Author(s):  
Xiaopeng Shan ◽  
Arkady Ellern ◽  
Ilia A. Guzei ◽  
James H. Espenson
Keyword(s):  
Oxidation Reactions ◽  
Ligand Displacement

An effective temperature approach for molecular dynamics simulations of quantum solids

2006 ◽  
Vol 429 (4-6) ◽  
pp. 450-456 ◽  
Author(s):  
Ll. Uranga-Piña ◽  
A. Martínez-Mesa ◽  
J. Rubayo-Soneira ◽  
G. Rojas-Lorenzo
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Effective Temperature ◽  
Quantum Solids ◽  
Dynamics Simulations

scholarly journals Dynamic deformability of individual PbSe nanocrystals during superlattice phase transitions

2019 ◽  
Vol 5 (6) ◽  
pp. eaaw5623 ◽  
Author(s):  
Yu Wang ◽  
Xinxing Peng ◽  
Alex Abelson ◽  
Penghao Xiao ◽  
Caroline Qian ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Morphological Changes ◽  
Semiconductor Nanocrystals ◽  
Structural Defects ◽  
Dipole Interactions ◽  
Ligand Displacement ◽  
Transmission Electron ◽  
Resolution Imaging ◽  
Phase Transmission ◽  
The Individual

The behavior of individual nanocrystals during superlattice phase transitions can profoundly affect the structural perfection and electronic properties of the resulting superlattices. However, details of nanocrystal morphological changes during superlattice phase transitions are largely unknown due to the lack of direct observation. Here, we report the dynamic deformability of PbSe semiconductor nanocrystals during superlattice phase transitions that are driven by ligand displacement. Real-time high-resolution imaging with liquid-phase transmission electron microscopy reveals that following ligand removal, the individual PbSe nanocrystals experience drastic directional shape deformation when the spacing between nanocrystals reaches 2 to 4 nm. The deformation can be completely recovered when two nanocrystals move apart or it can be retained when they attach. The large deformation, which is responsible for the structural defects in the epitaxially fused nanocrystal superlattice, may arise from internanocrystal dipole–dipole interactions.

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