Dynamical nuclear polarization by means of shallow donors in ZnO quantum dots

2009 ◽  
Vol 404 (23-24) ◽  
pp. 4779-4782 ◽  
Author(s):  
Pavel G. Baranov ◽  
Sergei B. Orlinskii ◽  
Celso de Mello Donega ◽  
Andries Meijerink ◽  
Hubert Blok ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nuclear Polarization ◽  
Shallow Donors ◽  
Dynamical Nuclear Polarization ◽  
Zno Quantum Dots

Dynamical nuclear polarization and confinement effects in ZnO quantum dots

2010 ◽  
Vol 247 (6) ◽  
pp. 1476-1479 ◽  
Author(s):  
Pavel G. Baranov ◽  
Sergei B. Orlinskii ◽  
Detlev M. Hofmann ◽  
Celso de Mello Donegá ◽  
Andries Meijerink ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nuclear Polarization ◽  
Confinement Effects ◽  
Dynamical Nuclear Polarization ◽  
Zno Quantum Dots

scholarly journals Efficient dynamical nuclear polarization in quantum dots: Temperature dependence

2007 ◽  
Vol 76 (20) ◽  
Author(s):  
B. Urbaszek ◽  
P.-F. Braun ◽  
T. Amand ◽  
O. Krebs ◽  
T. Belhadj ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Temperature Dependence ◽  
Nuclear Polarization ◽  
Dynamical Nuclear Polarization

scholarly journals Temperature-dependent dynamical nuclear polarization bistabilities in double quantum dots in the spin-blockade regime

2013 ◽  
Vol 88 (3) ◽  
Author(s):  
Anders Mathias Lunde ◽  
Carlos López-Monís ◽  
Ioanna A. Vasiliadou ◽  
Luis L. Bonilla ◽  
Gloria Platero
Keyword(s):  
Quantum Dots ◽  
Nuclear Polarization ◽  
Double Quantum ◽  
Temperature Dependent ◽  
Double Quantum Dots ◽  
Dynamical Nuclear Polarization ◽  
Spin Blockade

scholarly journals Hyperfine interaction in InAs/GaAs self-assembled quantum dots: dynamical nuclear polarization versus spin relaxation

2008 ◽  
Vol 9 (8) ◽  
pp. 874-884 ◽  
Author(s):  
Olivier Krebs ◽  
Benoît Eble ◽  
Aristide Lemaître ◽  
Paul Voisin ◽  
Bernhard Urbaszek ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hyperfine Interaction ◽  
Spin Relaxation ◽  
Nuclear Polarization ◽  
Dynamical Nuclear Polarization ◽  
Self Assembled

Dynamical Nuclear Polarization

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Spin Polarization ◽  
Nuclear Spin ◽  
Nuclear Polarization ◽  
Magnetic Moments ◽  
Nonlinear Effects ◽  
Many Body ◽  
Nuclear Spin Polarization ◽  
Optical Resonances ◽  
Dynamical Nuclear Polarization ◽  
Temperature Concept

The transfer of nonequilibrium spin polarization between the electron and nuclear subsystems is studied in detail. Usually, a thermal orientation of nuclei in magnetic field is negligible due to their small magnetic moments, but if electron spins are optically oriented, efficient nuclear spin polarization can occur. The microscopic approach to the dynamical nuclear polarization effect based on the kinetic equation method, along with a phenomenological but very powerful description of dynamical nuclear polarization in terms of the nuclear spin temperature concept is given. In this way, one can account for the interaction between neighbouring nuclei without solving a complex many-body problem. The hyperfine interaction also induces the feedback of polarized nuclei on the electron spin system giving rise to a number of nonlinear effects: bistability of nuclear spin polarization and anomalous Hanle effect, dragging and locking of optical resonances in quantum dots. Theory is illustrated by experimental data on dynamical nuclear polarization.

scholarly journals Synthesis and Characterization of Polyvinylpyrrolidone-Modified ZnO Quantum Dots and Their In Vitro Photodynamic Tumor Suppressive Action

2021 ◽  
Vol 22 (15) ◽  
pp. 8106
Author(s):  
Tianming Song ◽  
Yawei Qu ◽  
Zhe Ren ◽  
Shuang Yu ◽  
Mingjian Sun ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photodynamic Therapy ◽  
Inhibitory Effect ◽  
Therapeutic Effects ◽  
In Vivo Experiments ◽  
Potential Applications ◽  
Zno Quantum Dots ◽  
Zno Qds

Despite the numerous available treatments for cancer, many patients succumb to side effects and reoccurrence. Zinc oxide (ZnO) quantum dots (QDs) are inexpensive inorganic nanomaterials with potential applications in photodynamic therapy. To verify the photoluminescence of ZnO QDs and determine their inhibitory effect on tumors, we synthesized and characterized ZnO QDs modified with polyvinylpyrrolidone. The photoluminescent properties and reactive oxygen species levels of these ZnO/PVP QDs were also measured. Finally, in vitro and in vivo experiments were performed to test their photodynamic therapeutic effects in SW480 cancer cells and female nude mice. Our results indicate that the ZnO QDs had good photoluminescence and exerted an obvious inhibitory effect on SW480 tumor cells. These findings illustrate the potential applications of ZnO QDs in the fields of photoluminescence and photodynamic therapy.

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