Direct bandgap opening in sodium-doped antimonene quantum dots: an emerging 2D semiconductor

Hu, Liang; Xu, Zhenyu; Long, Fangchao; Yuan, Jun; Li, Hui; Zhao, Ailun; Han, Su‐Ting; Zhang, Nian; Liu, Xiaosong; Ruan, Shuangchen; Zeng, Yu‐Jia

doi:10.1039/d0mh00440e

Cited by 20 publications

(11 citation statements)

References 59 publications

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“…The comparison of the high‐resolution Sb 3d spectra in Figure 1f presented that the main peak (540.2 eV) for AMQDs was shifted and the satellite peak (537.7 eV) disappeared, indicating the changed surface states after exfoliation. [ 5b ] Overall, the above characterization results confirmed that AMQDs were successfully prepared by a probe sonication‐assisted exfoliation method.…”

Section: Resultssupporting

confidence: 64%

“…[ 17 ] This phenomenon may be related to the quantum confinement effect on the lateral and longitudinal dimensions. [ 5a,18 ] The chemical composition of the prepared AMQDs was well characterized by X‐ray photoelectron spectroscopy. As displayed in Figure S1 (Supporting Information), there were Sb, O, and C elements in the XPS survey spectrum of AMQDs.…”

Section: Resultsmentioning

confidence: 99%

“…However, low production efficiency, irregular products, and poor dispersion severely hinder the further development and application of AM. [ 5 ]…”

Section: Introductionmentioning

confidence: 99%

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Antimonene Quantum Dots as an Emerging Fluorescent Nanoprobe for the pH‐Mediated Dual‐Channel Detection of Tetracyclines

Liu

Xiao

et al. 2020

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Antimonene quantum dots (AMQDs) are attracting considerable attention due to their fascinating physicochemical properties. However, research on their semiconductor characteristics, especially the photoluminescence performance, is still in a preliminary stage and the experimental verification is scarcely reported, significantly restricting their further applications. Herein, the photoluminescence property of AMQDs is experimentally verified. The AMQDs are prepared by probe sonication‐assisted liquid‐phase exfoliation and show robust blue fluorescence, and the photoluminescence is hardly affected by pH. In view of the derivatization reaction of tetracyclines (TET) at different pHs, AMQDs are developed as a pH‐mediated dual‐channel ratiometric fluorescent probe for TET detection. Under acidic conditions, the AMQDs’ probe exhibits unique recognition behavior due to the inherent fluorescence of TET and the solvent‐enhancing effect, that is, the fluorescence changes from blue to red. Under alkaline conditions, this fluorescent probe realizes the transition from blue to yellow‐green because of the decomposition of TET. The limits of detection are 27 × 10−9 and 74 × 10−9 m, respectively. The high sensitivity and remarkable fluorescence changes make AMQDs ideal probes for TET sensing. Additionally, this is the first report on the photoluminescence property of AMQDs. It is believed that this work will open a new avenue for AMQDs in optical sensing fields.

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 99%

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Antimonene Quantum Dots as an Emerging Fluorescent Nanoprobe for the pH‐Mediated Dual‐Channel Detection of Tetracyclines

Liu

Xiao

et al. 2020

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“…Recently, various elemental 2D materials (e.g., P, As, Sb, and Bi) have become a stimulating research topic due to their fundamental band gap and potential as candidates for the next generation of electronic and optoelectronic devices . In particular, antimony (Sb) is considered to have excellent physicochemical properties and has been shown to easily peel off from bulk crystals …”

Section: Introductionmentioning

confidence: 99%

“…28 In particular, antimony (Sb) is considered to have excellent physicochemical properties and has been shown to easily peel off from bulk crystals. 29 According to density functional theory calculations, Sb with a thickness of one atomic layer has semiconducting electronic characteristics, with an indirect band gap of 2.28 eV. 30 Both theoretical and experimental data have shown that few-layered antimonene with semimetallic properties have high carrier mobility, thermal conductivity, and electron spin characteristics, which can effectively compensate for the low carriers' mobility of g-C 3 N 4 .…”

Section: ■ Introductionmentioning

confidence: 99%

Carbon Nitride Functionalized with Sb Resulting in High Photocatalytic Activity

Chen

Jin

Huang

et al. 2021

ACS Appl. Energy Mater.

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Composites based on Sb clusters anchored on graphitic carbon nitride (g-C3N4) are prepared via a hierarchical sealed-tube calcination method. In the first stage, thermal treatment brings the density and crystallinity of g-C3N4 to substantially increase, resulting in 4.5 times higher photocatalytic efficiency toward water splitting for hydrogen generation. After further calcination under sealed-tube conditions, Sb species are successfully anchored on the edge of the pores within the g-C3N4 matrix in the form of atomic clusters. Photocatalytic hydrogen generation from the resulting Sb@C3N4 is further enhanced 14.4 times compared with the pristine g-C3N4. Such an improvement can be ascribed to the tuning of the electronic structure in Sb@C3N4 and hastened charge transfer.

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Review on Recent Developments in 2D Ferroelectrics: Theories and Applications

2021

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Although only a few 2D materials have been predicted to possess ferroelectricity, 2D ferroelectrics are expected to play a dominant role in the upcoming nano era as important functional materials. The ferroelectric properties of 2D ferroelectrics are significantly different than those of traditional bulk ferroelectrics owing to their intrinsic size and surface effects. To date, 2D ferroelectrics have been reported to exhibit diverse properties ranging from bulk photovoltaic and piezoelectric/pyroelectric effects to the spontaneous valley and spin polarization. These properties are either dependent on ferroelectric polarization or coupled with it for easy electric control, thus making 2D ferroelectrics applicable to multifunctional nanodevices. At present, cumulative efforts are being made to explore 2D ferroelectrics in theories, experiments, and applications. Herein, such theories and methods are briefly introduced. Subsequently, intrinsic and extrinsic origins of 2D ferroelectricity are separately summarized. In addition, invented or laboratory-validated 2D ferroelectric-based applications are listed. Finally, the existing challenges and prospects of 2D ferroelectrics are discussed.

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Direct bandgap opening in sodium-doped antimonene quantum dots: an emerging 2D semiconductor

Abstract: The electric field control of Raman scattering for small molecules can be realized in direct semiconducting antimonene-based field effect transistor.

Cited by 20 publications

References 59 publications

Antimonene Quantum Dots as an Emerging Fluorescent Nanoprobe for the pH‐Mediated Dual‐Channel Detection of Tetracyclines

Antimonene Quantum Dots as an Emerging Fluorescent Nanoprobe for the pH‐Mediated Dual‐Channel Detection of Tetracyclines

Carbon Nitride Functionalized with Sb Resulting in High Photocatalytic Activity

Review on Recent Developments in 2D Ferroelectrics: Theories and Applications

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