Construction of ZnO/GaN in-plane heterojunction with different contacted modes and vacancy defects for improving magnetic and adsorption properties

Ding, Jijun; Yang, Mingya; Chen, Hạixia; Fu, Haiwei; Xiao, Bing

doi:10.1016/j.apsusc.2022.154500

Cited by 14 publications

(6 citation statements)

References 30 publications

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“…The formation energies ( E̅ f ) are calculated as E̅ normalf = E normalT − E SiC − E GaN where the E SiC and E GaN represent total energies of the g-SiC and g-GaN, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Constructing heterostructures using two or even multiple 2D materials is a feasible approach to preserve the unique properties of different materials. − In general, heterostructures can be classified into two categories. van der Waals (vdW) heterostructures are formed by vertically stacking two materials, where different materials interact through weak vdW forces. − Lateral heterostructures (LHSs), on the other hand, are constructed by stitching together two materials within a single plane, where the two materials are connected by strong chemical bonds. − Compared to vdW 10 heterostructures, LHSs offer several advantages, including a smaller interface area, stable bonding, and well-defined band alignment.…”

Section: Introductionmentioning

confidence: 99%

“…The research of Ding et al demonstrates that ZnO/GaN LHS with Ga or Zn defect not only exhibits unique electronic and magnetic properties but also is sensitive to SO 2 and NO 2 . The study conducted by Ye et al investigated the width and strain effects on the GeSe and phosphorene LHS and demonstrated that as the width and tensile strain increase, the band gap gradually decreases and undergoes transition from the indirect band gap to the direct band gap .…”

Section: Introductionmentioning

confidence: 99%

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Electrical Properties and Current-Illumination Characteristics of the SiC/GaN Lateral Heterostructure

Li,

Qin,

Cui

et al. 2024

J. Phys. Chem. C

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The construction of lateral heterostructures (LHSs) has the potential to adjust the electrical properties and current-illumination characteristics through interfacial interactions, providing new possibilities for the development of electron and photoelectric devices. In this research, the electronic and electrical properties as well as the current-illumination characteristics of the SiC/GaN LHSs have been investigated using first principles. The band structure analysis indicates that the band gap of the SiC/GaN LHSs can be regulated by the number of layers, and the type-II heterostructure and built-in electric field are formed. The SiC/GaN LHS have high electron carrier mobility along the Y-axis and higher current compared to the intrinsic g-GaN and g-SiC under the same forward bias voltage (V b ). Furthermore, the SiC/GaN LHS is a nanoscale p−n junction with a reverse current much smaller than the forward current. Photocurrent exhibits a strong response near-ultraviolet, and the maximum photocurrent is 79.03 a 0 2 /photon. The results show that SiC/GaN LHSs can be used as a potential material for electron and photoelectric devices.

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“…The formation energies ( E̅ f ) are calculated as E̅ normalf = E normalT − E SiC − E GaN where the E SiC and E GaN represent total energies of the g-SiC and g-GaN, respectively.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrical Properties and Current-Illumination Characteristics of the SiC/GaN Lateral Heterostructure

Li,

Qin,

Cui

et al. 2024

J. Phys. Chem. C

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“…This observation suggests that raising the temperature enhances the kinetic energy of liquid molecules, enabling more molecules to rapidly access the surface active sites of the adsorbent, thereby augmenting adsorption efficiency. 42,43 Compared with other magnetic materials for Cr(VI) adsorption capacity, ultrasoundassisted FS/GO/PPy nanocomposites showed good adsorption activity (Table S1).…”

Section: Effects Of Cr(vi) Concentration and Solutionmentioning

confidence: 99%

Acoustic-Dependent Enhanced Functionalized Magnetic Nanomaterials for Purification of Chromium Containing Water

Jin,

Xu,

Yang

et al. 2024

ACS Appl. Nano Mater.

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Magnetic nanomaterials typically exhibit good solid−liquid separation properties and surface modifiability, making them widely used in the separation and purification of highly toxic pollutants despite the problem of magnetic agglomeration. Herein, pure Fe 3 O 4 nanoparticles, graphene oxide (GO)-modified Fe 3 O 4 nanocomposites, polypyrrole (PPy)-modified Fe 3 O 4 nanocomposites, and GO and PPy-comodified Fe 3 O 4 nanocomposites were used as adsorbents to explore the universal and effective dispersion methods of functionalized magnetic nanoadsorbents from the perspective of acoustic parameters. System tests have shown that regardless of whether the surface of magnetic nanomaterials is modified or not, ultrasound radiation can significantly enhance the adsorption of Cr(VI) (2.1−7.3-folds). Detailed performance tests, ultrasonic parameters, and color development experiments show that the enhanced adsorption characteristics of magnetic nanomaterials with improved dispersion have a strong frequency/power dependence. Interestingly, a single modification layer, especially a combined modification layer, weakens this effect. After 5 cycles, the nanomaterial still has more than 90% adsorption efficiency, indicating that the nanoadsorbent has good cycle stability. In addition, this method exhibits excellent removal activity for Cr(VI) and other heavy metal ions (such as Pb 2+ ) in actual wastewater. This work confirms that ultrasound-assisted dispersion is a simple, efficient, and sustainable way to fully demonstrate the application characteristics of magnetic-based nanoadsorbents.

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“…ZnO is a typical n-type wide-bandgap semiconductor gas-sensitive material with large specific surface area, stable chemical and physical properties, low production cost and no pollution [8]. It has become one of the popular materials for metal oxide gas sensing and detection.…”

Section: Introductionmentioning

confidence: 99%

I-V characteristics and adsorption properties of ZnO/rGO/ZnO for gas sensing detection

Ding

Yang

et al. 2023

J. Phys.: Conf. Ser.

Self Cite

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The heterostructure consisting of zinc oxide and reduced graphene oxide (ZnO/rGO/ZnO) is prepared on cotton fabric by repeated immersion and magnetron sputtering. In addition, the gas selectivity of the sample is analyzed based on I-V characteristics under different gas atmospheres (air, methanal, ethanol, acetone and toluene). Compare with that in air atmosphere, the I-V characteristic curve under toluene gas atmosphere changes significantly, and the current decreased significantly. The experimental results show that the samples exhibit high selectivity. In order to study the intrinsic physical characteristics of the heterostructure after gas adsorption, the band structures, density of states (DOS), adsorption energy (Ead) and charge density difference (CDD) are calculated based on density function theory (DFT). The existence of rGO results in a high electrical conductivity, which is consistent with the experimental results. Meanwhile, toluene has the highest Ead (-0.85 eV) and charge transfer (0.67 e). The charge transfer results prove that a large number of electrons are transferred from the surface of the heterostructure to the vicinity of toluene molecules, which leads to a change in the electrical conductivity of the heterostructure. Based on the excellent gas selectivity, the application of cotton-based ZnO/rGO/ZnO structure in gas sensing field is promoted.

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Construction of ZnO/GaN in-plane heterojunction with different contacted modes and vacancy defects for improving magnetic and adsorption properties

Cited by 14 publications

References 30 publications

Electrical Properties and Current-Illumination Characteristics of the SiC/GaN Lateral Heterostructure

Electrical Properties and Current-Illumination Characteristics of the SiC/GaN Lateral Heterostructure

Acoustic-Dependent Enhanced Functionalized Magnetic Nanomaterials for Purification of Chromium Containing Water

I-V characteristics and adsorption properties of ZnO/rGO/ZnO for gas sensing detection

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