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德曼烯的带隙工程用于气体传感应用

Ong Kim Le^1,2, Viorel Chihaia³, Do Ngoc Son^4,5

¹Institute of Fundamental and Applied Sciences, Duy Tan University Ho Chi Minh City 700000 Vietnam.

|December 13, 2023

概括

德国对气体传感器有望在呼吸中检测癌症生物标志物. 德曼烯的空缺缺陷增强了挥发性有机化合物的吸附,其中结合最强. 完美和空位-2 德曼烯保持半导体特性,适用于气体传感应用.

科学领域:

材料科学材料科学材料科学
化学化学化学
纳米技术纳米技术

背景情况:

气体传感器对于通过分析呼吸生物标志物来诊断癌症等疾病至关重要.
为先进的气体传感器确定合适的二维材料仍然是一个重大挑战.
德国是一种二维材料,在传感器应用中具有有利的电子和结构性质.

研究的目的:

为了研究不同空位缺陷的基质的结构和电子特性.
探索与肝细胞癌相关的挥发性有机化合物 (VOC) 在germanene上的吸附行为.
评估德曼烯适用于疾病诊断中的气体传感应用的适用性.

主要方法:

使用PBE + vdW-DF2,HSE06 + PBE和HSE06 + vdW-DF2方案进行密度函数理论 (DFT) 的计算.
德国基质的模拟:完美,空位-1和空位-2.
挥发性有机物吸附分析:乙,1,4-他,甲基化物,和基甲基硫化物.

主要成果:

与完美的germanene相比,germanene的空缺缺陷可以提高VOC吸附强度.
醇表现出最强的吸附,并引起了最显著的结构变形.
吸附的VOCs改变了germanene的带隙;大多数空置-1germanene上的VOCs诱导了半导体到金属的过渡.

结论:

完美和空置-2 德曼烯基底在VOC吸附后保持其半导体性质.
这些特定的germanene结构是开发有效气体传感器的有希望的候选人.
相互作用机制主要是物理吸收,其中涉及p轨道的小电荷转移.

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