In this work, the effect of 50 nm thick gold nanosheets on the structural, morphological, optical and electrical properties of stacked layers of CdO are investigated. The insertion of Au nanoslabs decreased the lattice parameters of the cubic unit cells of CdO. It also decreased the microstrain, the defect density, the stacking fault percentage and increased the crystallite and grain sizes. Optically, the light absorbability is enhanced, the energy band gap is shrunk and the optical conductivity is increased. The optical conductivity parameters presented by scattering time, plasmon frequency, drift mobility and free carrier density are all engineered via participation of Au nanosheets. On the other hand, electrical measurements in the frequency domain of 0.01–1.80 GHz indicated that the Au nanosheets forced the capacitance spectra to exhibit negative values and increased the electrical conductivity in the studied frequency domain. The terahertz cutoff frequency is tuned in the range of 5.0–22.0 THz indicating the applicability of the CdO/Au/CdO (CAC) films as terahertz filters. The direct current electrical conductivity measurements have shown that while the CC samples exhibit nondegenerate extrinsic nature of conduction, the CAC samples displayed degenerate/nondegenerate transitions at 400 K. With the feature of negative capacitance that can be used for noise reduction and parasitic capacitance cancellation, the CAC films can be regarded as promising structure for multifunctional device applications.

在这项工作中，研究了50 nm厚的金纳米片对CdO堆叠层的结构，形态，光学和电学性质的影响。金纳米板的插入降低了CdO立方晶胞的晶格参数。它还降低了微应变，缺陷密度，堆垛层错率并增加了微晶和晶粒尺寸。在光学上，提高了光吸收能力，缩小了能带隙并且增加了光导率。由散射时间，等离激元频率，漂移迁移率和自由载流子密度表示的光导率参数都是通过金纳米片的参与而设计的。另一方面，电气测量的频率范围为0.01-1。80 GHz表明，金纳米片迫使电容谱显示负值，并在研究的频域中提高了电导率。太赫兹截止频率在5.0–22.0 THz的范围内调整，表明CdO / Au / CdO（CAC）薄膜可用作太赫兹滤波器。直流电导率测量结果表明，尽管CC样品表现出非退化的外在导电性质，但CAC样品在400 K时表现出退化/非退化转变。具有负电容的特性可用于降噪和消除寄生电容， CAC膜可以被认为是用于多功能设备应用的有希望的结构。太赫兹截止频率在5.0–22.0 THz范围内调整，表明CdO / Au / CdO（CAC）薄膜可用作太赫兹滤波器。直流电导率测量结果表明，尽管CC样品表现出非退化的外在导电性质，但CAC样品在400 K时表现出退化/非退化转变。具有负电容的特性可用于降噪和消除寄生电容， CAC膜可以被认为是用于多功能设备应用的有希望的结构。太赫兹截止频率在5.0–22.0 THz范围内调整，表明CdO / Au / CdO（CAC）薄膜可用作太赫兹滤波器。直流电导率测量结果表明，尽管CC样品表现出非退化的外在导电性质，但CAC样品在400 K时表现出退化/非退化转变。具有负电容的特性可用于降噪和消除寄生电容， CAC膜可以被认为是用于多功能设备应用的有前途的结构。