Nanosensing Backed by the Uncertainty Principle
Nanosensing Backed by the Uncertainty Principle
复制标题
由不确定性原理支持的纳米传感
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
B. Vlahovic
中科院分区：
文献类型：
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作者：
I. Filikhin;A. Karoui;B. Vlahovic
用于检测纳米尺寸物质（例如，大分子或分子团簇）通过它们对双纳米半导体异质结构中电子隧穿的影响进行了讨论。本文研究了双量子阱中单电子局域态和离域态的光谱分布与微扰的关系。通过修改点形状和限制势来模拟不对称性。电子能量的不确定性受到量子阱光谱内能级差异的限制。因此，我们建立了电子定位不确定性与能量不确定性之间的直接关系。我们已经在各种情况下表明，一个小的对称性破坏急剧影响电子的本地化。这些现象可以用来设计新的传感功能。这种传感器中的电荷传输对由检测到的物质引起的微小对称性破坏高度敏感。电子定位的检测构成传感器信号。
Possibility for a novel type of sensors for detecting nanosized substances (e.g., macromolecules or molecule clusters) through their effects on electron tunneling in a double nanoscale semiconductor heterostructure is discussed. We studied spectral distributions of localized/delocalized states of a single electron in a double quantum well (DQW) with relation to slight asymmetry perturbations. The asymmetry was modeled by modification of the dot shape and the confinement potential. Electron energy uncertainty is restricted by the differences between energy levels within the spectra of separated QWs. Hence, we established a direct relationship between the uncertainty of electron localization and the energy uncertainty. We have shown in various instances that a small violation of symmetry drastically affects the electron localization. These phenomena can be utilized to devise new sensing functionalities. The charge transport in such sensors is highly sensitive to minuscule symmetry violation caused by the detected substance. The detection of the electron localization constitutes the sensor signal.