Gogoi Jahnabi, Shishodia Shubham, Chowdhury Devasish
Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India
RSC Adv. 2020 Oct 12;10(61):37545-37554. doi: 10.1039/d0ra07386e. eCollection 2020 Oct 7.
The development of photo-responsive nanocomposite materials is important in the fabrication of optoelectronic devices. In this work, we fabricated a carbon dot doped azobenzene-clay nanocomposite which possesses different ac conductivity with and without UV treatment. At first, azobenzene nanoclusters were synthesised and then successfully used to make an azobenzene-clay nanocomposite. It was observed that there is a small change in the ac conductivity of the azobenzene-clay nanocomposite with and without UV treatment. However, this change in ac photoconductivity can be enhanced in the azobenzene-clay nanocomposite by doping with electron-rich cysteine and methionine carbon dots. Hence, ac conductivity properties of the carbon-doped azobenzene-clay nanocomposite can be tuned using UV light. Impedance measurements were determined using Electrochemical Impedance Spectroscopy. Mechanistic insight into the phenomenon is also discussed in the paper. Thus fabrication of tunable carbon dot doped photo-responsive azobenzene-clay nanocomposites will lead to the use of carbon dot doped azobenzene-clay nanocomposites in photo-switchable optoelectronic devices.
光响应纳米复合材料的发展在光电器件的制造中至关重要。在这项工作中，我们制备了一种碳点掺杂的偶氮苯 - 粘土纳米复合材料，其在有无紫外线处理的情况下具有不同的交流电导率。首先，合成了偶氮苯纳米团簇，然后成功用于制备偶氮苯 - 粘土纳米复合材料。据观察，偶氮苯 - 粘土纳米复合材料在有无紫外线处理时的交流电导率有微小变化。然而，通过掺杂富含电子的半胱氨酸和蛋氨酸碳点，偶氮苯 - 粘土纳米复合材料中的这种光致电导率变化可以得到增强。因此，可以使用紫外线调节碳掺杂偶氮苯 - 粘土纳米复合材料的交流电导率特性。使用电化学阻抗谱测定阻抗。本文还讨论了对该现象的机理洞察。因此，可调谐碳点掺杂的光响应偶氮苯 - 粘土纳米复合材料的制备将导致碳点掺杂偶氮苯 - 粘土纳米复合材料在光开关光电器件中的应用。
