Compton scattering, positron annihilation, and the electronic properties of quantum dots

2002 ◽  
Vol 65 (24) ◽  
Author(s):  
R. Saniz ◽  
B. Barbiellini ◽  
A. Denison
Keyword(s):  
Quantum Dots ◽  
Electronic Properties ◽  
Positron Annihilation ◽  
Compton Scattering

scholarly journals Electronic properties and quasi-zero-energy states of graphene quantum dots

2021 ◽  
Vol 103 (23) ◽  
Author(s):  
H. V. Grushevskaya ◽  
G. G. Krylov ◽  
S. P. Kruchinin ◽  
B. Vlahovic ◽  
Stefano Bellucci
Keyword(s):  
Quantum Dots ◽  
Electronic Properties ◽  
Graphene Quantum Dots ◽  
Zero Energy ◽  
Energy States

Interaction of a conjugated polyaromatic molecule with a single dangling bond quantum dot on a hydrogenated semiconductor

2016 ◽  
Vol 18 (5) ◽  
pp. 3854-3861 ◽  
Author(s):  
Szymon Godlewski ◽  
Marek Kolmer ◽  
Mads Engelund ◽  
Hiroyo Kawai ◽  
Rafal Zuzak ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Electronic Properties ◽  
Dangling Bond

Starphene molecules are weakly attached to single dangling bond quantum dots, retaining the unperturbed originally designed electronic properties.

scholarly journals Electronic properties and third-order optical nonlinearities in tetragonal chalcopyrite AgInS2, AgInS2/ZnS and cubic spinel AgIn5S8, AgIn5S8/ZnS quantum dots

2017 ◽  
Vol 5 (1) ◽  
pp. 149-158 ◽  
Author(s):  
Bartłomiej Cichy ◽  
Dominika Wawrzynczyk ◽  
Marek Samoc ◽  
Wiesław Stręk
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Electronic Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Optical Nonlinearities ◽  
Third Order

Electronic as well as third-order nonlinear optical properties of chalcopyrite AgInS2 and non-stoichiometric spinel AgIn5S8 quantum dots compared with corresponding Zn2+ alloyed compounds are presented in this work.

A numerically efficient approach to the modelling of double-Qdot channels

2013 ◽  
Vol 2 (1) ◽  
Author(s):  
A. Shamloo ◽  
A.P. Sowa
Keyword(s):  
Quantum Dots ◽  
Quantum Computing ◽  
Ab Initio ◽  
Quantum System ◽  
Electronic Properties ◽  
Density Of States ◽  
Potential Application ◽  
Ab Initio Simulation ◽  
Efficient Approach ◽  
Essential Properties

AbstractWe consider the electronic properties of a system consisting of two quantum dots in physical proximity, which we will refer to as the double-Qdot. Double-Qdots are attractive in light of their potential application to spin-based quantum computing and other electronic applications, e.g. as specialized sensors. Our main goal is to derive the essential properties of the double-Qdot from a model that is rigorous yet numerically tractable, and largely circumvents the complexities of an ab initio simulation. To this end we propose a novel Hamiltonian that captures the dynamics of a bi-partite quantum system, wherein the interaction is described via a Wiener-Hopf type operator. We subsequently describe the density of states function and derive the electronic properties of the underlying system. The analysis seems to capture a plethora of electronic profiles, and reveals the versatility of the proposed framework for double-Qdot channel modelling.

scholarly journals Effects of Aromatic Thiol Capping Agents on the Structural and Electronic Properties of CdnTen (n = 6,8 and 9) Quantum Dots

2021 ◽  
Vol 8 ◽  
Author(s):  
Muhammad Imran ◽  
Muhammad Jawwad Saif ◽  
Tahir Farooq ◽  
Javed Iqbal
Keyword(s):  
Quantum Dots ◽  
Electronic Properties ◽  
Absorption Spectra ◽  
Capping Agents ◽  
Aromatic Thiol ◽  
Td Dft ◽  
Structural And Electronic Properties ◽  
Aromatic Thiols ◽  
Capping Ligands ◽  
Homo Lumo

Thiols are efficient capping agents used for the synthesis of semiconductor and metal nanoparticles. Commonly, long-chain thiols are used as passivating agents to provide stabilization to nanoparticles. Theoretical methods rarely reported aromatic thiol ligands’ effects on small-sized CdTe quantum dots’ structural and electronic properties. We have studied and compared the structural and electronic properties of (i) bare and (ii) aromatic thiols (thiophenol, 4-methoxybenzenethiol, 4-mercaptobenzonitrile, and 4-mercaptobenzoic acid) capped CdnTen quantum dots (QDs). Aromatic thiols are used as thiol-radical because of the higher tendency of thiol-radicals to bind with Cd atoms. This work provides an understanding of how the capping agents affect specific properties. The results show that all aromatic thiol-radical ligands caused significant structural distortion in the geometries. The aromatic thiol-radical ligands stabilize LUMOs, stabilize or destabilize HOMOs, and decrease HOMO-LUMO gaps for all the capped QDs. The stabilization of LUMOs is more pronounced than the destabilization of HOMOs. We also studied the effect of solvent on structural and electronic properties. TD-DFT calculations were performed to calculate the absorption spectra of bare and capped QDs, and all the capping ligands resulted in the redshift of absorption spectra.

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