Coupled Colloidal Quantum Dot Molecules,Accounts of Chemical Research

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Coupled Colloidal Quantum Dot Molecules
Accounts of Chemical Research ( IF 16.4 ) Pub Date : 2021-01-18 , DOI: 10.1021/acs.accounts.0c00691
Somnath Koley _{1,

2} , Jiabin Cui _{1,

2} , Yossef E. Panfil _{1,

2} , Uri Banin _{1,

2}

Affiliation

Electronic coupling and hence hybridization of atoms serves as the basis for the rich properties for the endless library of naturally occurring molecules. Colloidal quantum dots (CQDs) manifesting quantum strong confinement possess atomic-like characteristics with s and p electronic levels, which popularized the notion of CQDs as artificial atoms. Continuing this analogy, when two atoms are close enough to form a molecule so that their orbitals start overlapping, the orbitals energies start to split into bonding and antibonding states made out of hybridized orbitals. The same concept is also applicable for two fused core–shell nanocrystals in close proximity. Their band edge states, which dictate the emitted photon energy, start to hybridize, changing their electronic and optical properties. Thus, an exciting direction of “artificial molecules” emerges, leading to a multitude of possibilities for creating a library of new hybrid nanostructures with novel optoelectronic properties with relevance toward diverse applications including quantum technologies.

中文翻译：

胶体量子点耦合分子

电子耦合以及原子的杂化为自然存在的分子的无穷库提供了丰富的特性。表现出量子强约束作用的胶体量子点（CQD）具有s和p的原子状特征电子水准仪，将CQD的概念推广为人造原子。继续这个类比，当两个原子足够接近以形成一个分子，从而使它们的轨道开始重叠时，轨道的能量开始分裂成由杂化轨道构成的键合和反键状态。同样的概念也适用于紧邻的两个熔融核-壳纳米晶体。决定发射光子能量的它们的能带边缘状态开始杂交，从而改变了它们的电子和光学特性。因此，出现了一个“人造分子”的激动人心的方向，从而为创建具有新颖光电特性的新型混合纳米结构库提供了多种可能性，该库与包括量子技术在内的多种应用有关。

更新日期：2021-03-02

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