Results 61 to 70 of about 610,695 (319)

Single to quadruple quantum dots with tunable tunnel couplings [PDF]

Appl. Phys. Lett. 104, 113109 (2014), 2014
We prepare a gate-defined quadruple quantum dot to study the gate-tunability of single to quadruple quantum dots with finite inter-dot tunnel couplings. The measured charging energies of various double dots suggest that the dot size is governed by gate geometry.
arxiv   +1 more source

Direct Ink Writing of Conductive Hydrogels

Advanced Functional Materials, EarlyView.
This review examines the use of direct ink writing (DIW) for fabricating conductive hydrogels with customizable 3D structures. It outlines the rheological requirements for successful DIW, followed by an exploration of the materials and ink formulations used to impart electronic and/or ionic conductivity to hydrogels while maintaining printability ...
Monica Ho, Aline Braz Ramirez, Negar Akbarnia, Eric Croiset, Elisabeth Prince, Gerald G. Fuller, Milad Kamkar   +6 more
wiley   +1 more source

Enhancing Third- and Fifth-Order Nonlinearity via Tunneling in Multiple Quantum Dots

Nanomaterials, 2019
The nonlinearity of semiconductor quantum dots under the condition of low light levels has many important applications. In this study, linear absorption, self-Kerr nonlinearity, fifth-order nonlinearity and cross-Kerr nonlinearity of multiple quantum ...
Si-Cong Tian, Huan-Yu Lu, Hang Zhang, Li-Jie Wang, Shi-Li Shu, Xin Zhang, Guan-Yu Hou, Zi-Ye Wang, Cun-Zhu Tong, Li-Jun Wang   +9 more
doaj   +1 more source

Hydrogel‐Based Photothermal‐Catalytic Membrane for Efficient Cogeneration of Freshwater and Hydrogen in Membrane Distillation System

Advanced Functional Materials, EarlyView.
This work presents an overview of the PTC‐VMD system for water‐hydrogen co‐generation. a) Illustration of the hydrogel‐based PTC membrane and the co‐generation of water and hydrogen. b) Structure of the PTC‐VMD system and the functions of each component layer.
Jiawei Sun, Muhammad Usman Farid, Wenlong Xi, Gang Lu, Min Wei Boey, Sai Kishore Ravi, Patrick H.‐L. Sit, Alicia Kyoungjin An   +7 more
wiley   +1 more source

MOF-Confined Sub-2 nm Stable CsPbX₃ Perovskite Quantum Dots

Nanomaterials, 2019
The metal halide with a perovskite structure has attracted significant attention due to its defect-tolerant photophysics and optoelectronic features. In particular, the all-inorganic metal halide perovskite quantum dots have potential for development in ...
Zhenxing Li, Chengcheng Yu, Yangyang Wen, Zhiting Wei, Junmei Chu, Xiaofei Xing, Xin Zhang, Mingliang Hu, Miao He   +8 more
doaj   +1 more source

Band Modulation for Silicene and Graphene Quantum Dots: A First-Principles Calculation [PDF]

arXiv, 2018
The band modulation of the silicene and graphene quantum dots is investigated by a first-principles method. This study includes the ordinary silicene and graphene quantum dots and the embedded quantum dots in the hydrogenated silicene and graphene. The shapes and sizes of quantum dots are recognized as important factors for the electronic properties ...
arxiv  

Luminescence Spectra of a Quantum-Dot Cascade Laser [PDF]

, 2000
A quantum cascade laser where the quantum wells in the active regions are replaced by quantum dots with their atom-like discrete energy levels is an interesting system to study novel features in optical spectroscopy. We study structures suitable for diagonal lasing transitions in coupled dots, and vertical lasing transitions in a single dot, in the ...
arxiv   +1 more source

Theory of polaron resonance in quantum dots and quantum-dot molecules [PDF]

Journal of Applied Physics, 2007
This work presents the theory of exciton coupling to photons and longitudinal optical (LO) phonons in quantum dots (QDs) and quantum-dot molecules (QDMs). Resonant-round trips of the exciton between the ground (bright) and excited (dark or bright) states, mediated by the LO phonon, alter the decay time and yield the Rabi oscillation.
openaire   +4 more sources

Fibrous Pb(II)‐Based Coordination Polymer Operable as a Photocatalyst and Electrocatalyst for High‐Rate, Selective CO2‐to‐Formate Conversion

Advanced Functional Materials, EarlyView.
A coordination polymer [Pb(tadt)]n prepared by a microwave‐assisted solvothermal method selectively reduces CO2 into formate under visible light with a high apparent quantum yield of ≈25% at 400 nm. It can function as a pre‐catalyst, along with conductive Ketjen Black, to form an active PbCO3/Pb3(CO3)2(OH)2 mixture that exhibits a high Faradaic ...
Chomponoot Suppaso, Ryosuke Nakazato, Shoko Nakahata, Yoshinobu Kamakura, Fumitaka Ishiwari, Akinori Saeki, Daisuke Tanaka, Kazuhide Kamiya, Kazuhiko Maeda   +8 more
wiley   +1 more source

Integrability of quantum dots

Physics Letters B
We determine the frequency ratios $τ\equiv ω_z/ω_ρ$ for which the Hamiltonian system with a potential \[ V=\frac{1}{r}+\frac{1}{2}\Big({ω_ρ}^2(x^2+y^2)+{ω_z}^2 z^2\Big) \] is completely integrable. We relate this result to the existence of conformal Killing tensors of the associated Eisenhart metric on $\mathbb{R}^{1, 4}$.
Maciej Dunajski, Andrzej Maciejewski, Maria Przybylska   +2 more
openaire   +3 more sources