Enhanced spin-polarization and detection limit in a spin-based optoelectrochemical DNA hybridization sensor induced by circularly polarized light†

IF 3.5 Q2 CHEMISTRY, ANALYTICAL
Mayank Tiwari and Debabrata Mishra
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Abstract

We investigate the influence of the correlation between different types of polarized light (linear and circular) and spin-polarization |Ps| (in %) on the effectiveness of a spin-based quantum dot-modified DNA device for a DNA hybridization sensor. The device exhibits a significant two-fold increase in |Ps| (in %) when exposed to circularly polarized (C.P.) light, in comparison to the state of no illumination. This improvement in |Ps| results in a significant ten-fold enhancement in the limit of detection (L.O.D.) of the electrode under C.P. light illumination, surpassing the conditions without illumination and even achieving a two-fold increase compared to linearly polarized (L.P.) light illumination. These results emphasize the crucial significance of polarized light in maximizing the efficiency of spin-based DNA hybridization sensors. The significant enhancements in the performance observed under C.P. light illumination demonstrate the potential use of our device to function as a highly sensitive and efficient tool in spin-based bio-sensing applications.

Abstract Image

Abstract Image

圆偏振光诱导自旋光电化学 DNA 杂交传感器增强自旋偏振和探测极限
我们研究了不同类型的偏振光(线性偏振光和圆偏振光)与自旋偏振 |Ps|(%)之间的相关性对基于自旋量子点修饰的 DNA 器件在 DNA 杂交传感器中的有效性的影响。与无光照状态相比,该装置在圆偏振光(C.P.)照射下的|Ps|(单位:%)显著增加了两倍。在 C.P. 光照射下,|Ps|的提高使电极的检测限(L.O.D.)显著提高了十倍,超过了无照射条件,甚至比线性偏振光(L.P.)照射下提高了两倍。这些结果表明,偏振光对于最大限度地提高自旋 DNA 杂交传感器的效率至关重要。在 C.P.光照射下观察到的性能大幅提高表明,我们的设备有可能在基于自旋的生物传感应用中发挥高灵敏度和高效工具的作用。
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CiteScore
2.30
自引率
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