Results 151 to 160 of about 885,186 (351)

Triplet-singlet relaxation in semiconductor single and double quantum dots

, 2007
We study the triplet-singlet relaxation in two-electron semiconductor quantum dots. Both single dots and vertically coupled double dots are discussed. In our work, the electron-electron Coulomb interaction, which plays an important role in the electronic
C. G. Darwin, E. I. Rashba, G. D. Mahan, G. E. Pikus, K. Shen, M. I. D’yakonov, M. I. D’yakonov, M. W. Wu, P. Vogl   +8 more
core   +1 more source

Advances in Radiative Heat Transfer: Bridging Far‐Field Fundamentals and Emerging Near‐Field Innovations

Advanced Functional Materials, EarlyView.
This review synthesizes the evolution of radiative heat transfer, emphasizing the transition from far‐field to near‐field regimes. Traditional frameworks, such as Planck's law, are revisited alongside modern innovations like fluctuational electrodynamics. Applications span nanoscale thermal management, energy harvesting, and thermophotovoltaic systems.
Ambali Alade Odebowale, Andergachew Berhe, Rasheed T. Ogundare, Salah Abdo, Amer Abdulghani, Haroldo T. Hattori, Andrey E. Miroshnichenko   +6 more
wiley   +1 more source

Scalable Quantum Computing with "Enhancement" Quantum Dots [PDF]

arXiv, 2005
We propose a novel scheme of solid state realization of a quantum computer based on single spin "enhancement mode" quantum dots as building blocks. In the enhancement quantum dots, just one electron can be brought into initially empty dot, in contrast to depletion mode dots based on expelling of electrons from multi-electron dots by gates.
arxiv  

Chemical nature and structure of organic coating of quantum dots is crucial for their application in imaging diagnostics

International Journal of Nanomedicine, 2011
Rumiana Bakalova1, Zhivko Zhelev1, Daisuke Kokuryo1, Lubomir Spasov2, Ichio Aoki1, Tsuneo Saga11Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Japan; 2Medical Faculty, Sofia University, Sofia, BulgariaBackground: One of the
Bakalova R, Zhelev Z, Kokuryo D, Spasov L, Aoki I, Saga T   +5 more
doaj  

Beer's law in semiconductor quantum dots

, 2010
The propagation of a coherent optical linear wave in an ensemble of semiconductor quantum dots is considered. It is shown that a distribution of transition dipole moments of the quantum dots changes significantly the polarization and Beer's absorption ...
Adamashvili, G. T., Maradudin, A. A.
core  

Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst

Advanced Functional Materials, EarlyView.
This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu, Hao Wu, Hoi Ying Chung, Yun Hau Ng   +3 more
wiley   +1 more source

Ultra‐Effective Light‐Activated Antibacterial Activity via Carboxyl Functionalized Graphene Quantum Dots and Films

Advanced Functional Materials, EarlyView.
Carboxyl‐functionalized graphene quantum dots (cGQDs) exhibit high singlet oxygen quantum yield due to strong spin–orbit coupling. cGQDs achieve minimum bactericidal concentration of only 0.4 µg mL−1 against S. aureus under low‐intensity illumination.
Muhammad Hassnain, Laure S. van Hofwegen, Humeyra Nur Kaleli, Temirlan Kubanaliev, Zafer Eroglu, Asim Onal, Payal P. S. Balraadjsing, Onder Metin, Fahri Alkan, Sebastian A. J. Zaat, Sedat Nizamoglu   +10 more
wiley   +1 more source

The Origin of Stokes Shift in Semiconductor Quantum Dots [PDF]

arXiv, 2005
The mechanism of Stokes shift in semiconductor quantum dots is investigated by calculating the energy of the excitonic states. We have taken into account all possible contributions to the total electronic energy in the dot, i.e, dielectric mismatch between dot and surrounding medium, the effects of finite barrier height and electron-hole exchange ...
arxiv  

Synthesis of SnO2 quantum dots with 1,3-dimethylimidazolium-2-carboxylate as inducing agent and the gas sensitive performance to ethanol

Xi'an Gongcheng Daxue xuebao
In order to obtain SnO2 quantum dots with good gas response, the SnO2 quantum dots with diameters of about 4 nm were successfully synthesized by using 1,3-dimethyl imidazolium-2-carboxylate (1,3-diMiM-2-COO) as inducing agent and polyethylene glycol 200 (
LIU Songtao, ZHENG Xianjun, YANG Kai, SUN Zhongming, FANG Chenyu, HOU Haiyun   +5 more
doaj   +1 more source

Magnetism of graphene quantum dots

npj Quantum Materials, 2017
Condensed matter physics: intrinsic magnetism emerges in graphene quantum dots A local magetic moment emerges in nanoscale high purity graphene quantum dots, probably resulting from edge passivation.
Yuanyuan Sun, Yongping Zheng, Hongzhe Pan, Jie Chen, Weili Zhang, Lin Fu, Kaiyu Zhang, Nujiang Tang, Youwei Du   +8 more
doaj   +1 more source