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学者姓名:陈光德

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< Page ,Total 19 >
Structural and optical properties of porous ZnO nanorods synthesized by a simple two-step method SCIE
期刊论文 | 2019 , 128 , 30-36 | SUPERLATTICES AND MICROSTRUCTURES
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Abstract :

The porous ZnO nanorods were successfully synthesized by a two-step template free method consisting of a modified hydrothermal approach and subsequent annealing treatment. Additive formaldehyde was adopted in the initial hydrothermal approach. Numerous mesopores with orderly distribution along the c axis apparently appeared in the annealed products. It is suggested that formaldehyde might adsorb in ZnO nanorods during the hydrothermal process and decompose under elevated temperature. The release of the generated gas prompted the formation of the pores. A schematic model was proposed to describe the forming of pores in ZnO nanorods. Further investigation demonstrated that the emission behavior and crystallographic quality may highly depend on the annealing temperature. The intensity ratio of the ultraviolet emission peak and visible emission peak as well as the crystallographic quality fluctuates due to the competition of the forming of pores and annealed temperature. The samples annealed at 450 degrees C possess high crystallographic quality and large surface area, which may be the suitable candidate for highly effective photocatalyst and ZnO based photoelectric devices.

Keyword :

Annealing Photoluminescence ZnO Porous nanorods

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GB/T 7714 Duan, Xiangyang , Li, Chu , Fu, Linjie et al. Structural and optical properties of porous ZnO nanorods synthesized by a simple two-step method [J]. | SUPERLATTICES AND MICROSTRUCTURES , 2019 , 128 : 30-36 .
MLA Duan, Xiangyang et al. "Structural and optical properties of porous ZnO nanorods synthesized by a simple two-step method" . | SUPERLATTICES AND MICROSTRUCTURES 128 (2019) : 30-36 .
APA Duan, Xiangyang , Li, Chu , Fu, Linjie , Wu, Yelong , Chen, Guangde , Xu, Kun et al. Structural and optical properties of porous ZnO nanorods synthesized by a simple two-step method . | SUPERLATTICES AND MICROSTRUCTURES , 2019 , 128 , 30-36 .
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Produce large-sized porous ZnO ceramics at a low temperature down to 573 K SCIE
期刊论文 | 2019 , 242 , 160-162 | MATERIALS LETTERS
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Large-sized porous ZnO ceramics were successfully produced at a low temperature down to 573 K for the first time. The ceramics were composed of pores with a diameter of hundreds of nanometers and intersected ZnO nanosheets with a thickness of tens of nanometers, and their bending strength was up to 41.4 MPa when its porosity was about 43%, which meant that their strength and the bonds between their building blocks were exactly the same as those in the ceramics produced by sintering its preforms at a high temperature. (C) 2019 Elsevier B.V. All rights reserved.

Keyword :

Porous materials Ceramics

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GB/T 7714 Yan, Guojun , Wang, Liyu , Yan, Changming et al. Produce large-sized porous ZnO ceramics at a low temperature down to 573 K [J]. | MATERIALS LETTERS , 2019 , 242 : 160-162 .
MLA Yan, Guojun et al. "Produce large-sized porous ZnO ceramics at a low temperature down to 573 K" . | MATERIALS LETTERS 242 (2019) : 160-162 .
APA Yan, Guojun , Wang, Liyu , Yan, Changming , Qiu, Yu , Chen, Guangde . Produce large-sized porous ZnO ceramics at a low temperature down to 573 K . | MATERIALS LETTERS , 2019 , 242 , 160-162 .
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Orientational Epitaxy of van der Waals Molecular Heterostructures EI SCIE PubMed Scopus
期刊论文 | 2018 , 18 (8) , 5257-5261 | NANO LETTERS
WoS CC Cited Count: 5 SCOPUS Cited Count: 4
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Abstract :

The shape of individual building blocks is an important parameter in bottom-up self-assembly of nanostructured materials. A simple shape change from sphere to spheroid can significantly affect the assembly process due to the modification to the orientational degrees of freedom. When a layer of spheres is placed upon a layer of spheroids, the strain at the interface can be minimized by the spheroid taking a special orientation. C-70 fullerenes represent the smallest spheroids, and their interaction with a sphere-like C-g0 is investigated. We find that the orientation of the C-70 within a close-packed C-70 layer can be steered by contacting a layer of C-60. This orientational steering phenomenon is potentially useful for epitaxial growth of multilayer van der Waals molecular heterostructures.

Keyword :

van der Waals heterostructures epitaxy graphene scanning tunnelling microscopy interface fullerene self-assembly

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GB/T 7714 Guo, Lu'an , Wang, Yitao , Kaya, Dogan et al. Orientational Epitaxy of van der Waals Molecular Heterostructures [J]. | NANO LETTERS , 2018 , 18 (8) : 5257-5261 .
MLA Guo, Lu'an et al. "Orientational Epitaxy of van der Waals Molecular Heterostructures" . | NANO LETTERS 18 . 8 (2018) : 5257-5261 .
APA Guo, Lu'an , Wang, Yitao , Kaya, Dogan , Palmer, Richard E. , Chen, Guangde , Guo, Quanmin . Orientational Epitaxy of van der Waals Molecular Heterostructures . | NANO LETTERS , 2018 , 18 (8) , 5257-5261 .
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The synthesis of hierarchically meso-macroporus aluminum nitrides microparticles via aluminum alloy nitridization EI SCIE Scopus
期刊论文 | 2017 , 186 , 271-273 | MATERIALS LETTERS | IF: 2.687
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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in the paper, for the first time, the synthesis of aluminum nitrides microparticles with a hierarchically meso-macroporus structure were reported by an aluminum-magnesium alloy nitridization routine. The hierarchically meso-macroporous aluminum nitrogen with a specific surface area of 97.7 m(2)/g and a specific mesopore volume of 0.10 cm(3)/g was prepared by nitriding an aluminum-magnesium alloy with diameters between 75 mu m and 150 mu m at the temperature 500 degrees C for 8 h firstly, and then 800 degrees C for 6 h.

Keyword :

Semiconductors Metals and alloy Porous materials Aluminum nitrides

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GB/T 7714 Yan, Guojun , Cun, Minmin , Li, Meng et al. The synthesis of hierarchically meso-macroporus aluminum nitrides microparticles via aluminum alloy nitridization [J]. | MATERIALS LETTERS , 2017 , 186 : 271-273 .
MLA Yan, Guojun et al. "The synthesis of hierarchically meso-macroporus aluminum nitrides microparticles via aluminum alloy nitridization" . | MATERIALS LETTERS 186 (2017) : 271-273 .
APA Yan, Guojun , Cun, Minmin , Li, Meng , Wang, Liyi , Chen, Guangde , Hui, Chunli et al. The synthesis of hierarchically meso-macroporus aluminum nitrides microparticles via aluminum alloy nitridization . | MATERIALS LETTERS , 2017 , 186 , 271-273 .
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Adsorption behavior of formaldehyde on ZnO (10(1)over-bar0) surface: A first principles study EI SCIE Scopus
期刊论文 | 2017 , 423 , 451-456 | APPLIED SURFACE SCIENCE | IF: 4.439
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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Abstract :

In a first principles study of the formaldehyde adsorption on ZnO surface, we found a novel chain adsorption structure on ZnO (10 (1) over bar0) plane. This adsorption structure results from the electrostatic interactions between those adsorbed formaldehyde molecules and the unique arrangement of Zn-O surface dimers on (10 (1) over bar0) plane. This adsorption mechanism has the potential to extend to other wurtzite materials' (10 (1) over bar0) plane and other similar cases. As the physical adsorption configurations are unstable, the chemical adsorption has to happen. The electronic properties show that the C = O double bond in CH2O turns into C-O single bond and the highest occupied molecule orbital (HOMO) of formaldehyde is lifted into ZnO band gap becoming the hole trapping center. These results may be meaningful for formaldehyde degradation and detection. (C) 2017 Elsevier B.V. All rights reserved.

Keyword :

ZnO Formaldehyde First principles Adsorption

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GB/T 7714 Jin, Wentao , Chen, Guangde , Duan, Xiangyang et al. Adsorption behavior of formaldehyde on ZnO (10(1)over-bar0) surface: A first principles study [J]. | APPLIED SURFACE SCIENCE , 2017 , 423 : 451-456 .
MLA Jin, Wentao et al. "Adsorption behavior of formaldehyde on ZnO (10(1)over-bar0) surface: A first principles study" . | APPLIED SURFACE SCIENCE 423 (2017) : 451-456 .
APA Jin, Wentao , Chen, Guangde , Duan, Xiangyang , Yin, Yuan , Ye, Honggang , Wang, Dan et al. Adsorption behavior of formaldehyde on ZnO (10(1)over-bar0) surface: A first principles study . | APPLIED SURFACE SCIENCE , 2017 , 423 , 451-456 .
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Crystallography facet tailoring of carbon doped ZnO nanorods via selective etching EI SCIE Scopus
期刊论文 | 2017 , 406 , 186-191 | APPLIED SURFACE SCIENCE | IF: 4.439
WoS CC Cited Count: 5 SCOPUS Cited Count: 5
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Abstract :

Using a facile hydrothermal method, we have successfully synthesized carbon doped (C-doped) ZnO nanorods with standard hexagonal column shapes. To modify their photocatalytic activities by tailoring the surfaces, a post etching process under ammonia atmosphere was used, and these nanorods could be converted into hexagonal porous nanorods at 750 degrees C), and porous nanorods with corrugated surface structures covered by alternant (1121) and (1121) planes (at 850 degrees C and 950 degrees C). Energy Dispersion Spectrum and Raman spectra are used to carefully study the concentration and vibration modes of the doped carbon species. It explicitly shows that there is a carbonation process around 750 degrees C and some organic aldehyde molecules transform into carbon with flake form. After investigating their photoluminescence spectra and photocatalytic activities, we conclude that an appropriate etching temperature is the key point to obtain high photocatalytic performance. (C) 2017 Elsevier B.V. All rights reserved.

Keyword :

Raman Carbonization Porous materials Corrugated nanorods Doping Selective etch

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GB/T 7714 Duan, Xiangyang , Chen, Guangde , Gao, Peihong et al. Crystallography facet tailoring of carbon doped ZnO nanorods via selective etching [J]. | APPLIED SURFACE SCIENCE , 2017 , 406 : 186-191 .
MLA Duan, Xiangyang et al. "Crystallography facet tailoring of carbon doped ZnO nanorods via selective etching" . | APPLIED SURFACE SCIENCE 406 (2017) : 186-191 .
APA Duan, Xiangyang , Chen, Guangde , Gao, Peihong , Jin, Wentao , Ma, Xiaoman , Yin, Yuan et al. Crystallography facet tailoring of carbon doped ZnO nanorods via selective etching . | APPLIED SURFACE SCIENCE , 2017 , 406 , 186-191 .
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Comparison between two device structures of SPR enhanced UV detectors based on ZnO EI SCIE Scopus
期刊论文 | 2017 , 80 (1) | EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS | IF: 0.802
WoS CC Cited Count: 1
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Surface plasmon resonance can be exploited to greatly enhance the photo response of photo detectors. The enhancement is highly dependent on the device structure of the detector. In this paper, we compared two types of SPR enhanced UV detectors based on ZnO in terms of fabrication process, absorption, I V curves, and spectral response. The peak responsivity is enlarged by 22 100 times due to SPR enhancement. The embedding type detector has an advantage in dark current controlling. However, the surface type detector has a simpler fabrication process and more importantly a more prominent responsivity enhancement. Therefore, the surface type is a more favourable structure to incorporate SPR with ZnO UV detectors to realize large enhancement of responsivity.

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GB/T 7714 Li, Gaoming , Zhang, Jingwen , Chen, Guangde et al. Comparison between two device structures of SPR enhanced UV detectors based on ZnO [J]. | EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS , 2017 , 80 (1) .
MLA Li, Gaoming et al. "Comparison between two device structures of SPR enhanced UV detectors based on ZnO" . | EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS 80 . 1 (2017) .
APA Li, Gaoming , Zhang, Jingwen , Chen, Guangde , Hou, Xun . Comparison between two device structures of SPR enhanced UV detectors based on ZnO . | EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS , 2017 , 80 (1) .
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Exploring Emerging Photovoltaic Materials Beyond Perovskite: The Case of Skutterudite EI SCIE Scopus
期刊论文 | 2017 , 29 (21) , 9429-9435 | CHEMISTRY OF MATERIALS | IF: 9.89
WoS CC Cited Count: 5 SCOPUS Cited Count: 5
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Because of the stability and toxic issue of CH3NH3PbI3, great efforts have been made to search emerging materials beyond perovskite. Most of the explorations are based on ns(2)-containing compounds, because lone-pair s-orbital-derived antibonding states are believed to play a crucial role in unique properties of CH3NH3PbI3. In this work, we chose skutterudite-structure IrSb3 (Eg approximate to 1.3 eV) as a case study to show that the strong antibonding character at valence band maximum (VBM) can appear without the contribution from lone-pair s orbital. First-principles calculations show that IrSb3 possesses similar electronic properties as CH3NH3PbI3: (i) ambipolar conductivity with much better electron and hole effective masses than that of CH(3)NH(3)PbI3; (ii) strong optical absorption (similar to 1 X 10(4) cm(-1)); (iii) shallow dominating defects. More importantly, IrSb3 is much more stable than CH3NH3PbI3. Our work may shed light on searching new promising solar cell materials beyond ns(2)P-containing perovskite.

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GB/T 7714 Yin, Yuan , Huang, Yang , Wu, Yelong et al. Exploring Emerging Photovoltaic Materials Beyond Perovskite: The Case of Skutterudite [J]. | CHEMISTRY OF MATERIALS , 2017 , 29 (21) : 9429-9435 .
MLA Yin, Yuan et al. "Exploring Emerging Photovoltaic Materials Beyond Perovskite: The Case of Skutterudite" . | CHEMISTRY OF MATERIALS 29 . 21 (2017) : 9429-9435 .
APA Yin, Yuan , Huang, Yang , Wu, Yelong , Chen, Guangde , Yin, Wan-Jian , Wei, Su-Huai et al. Exploring Emerging Photovoltaic Materials Beyond Perovskite: The Case of Skutterudite . | CHEMISTRY OF MATERIALS , 2017 , 29 (21) , 9429-9435 .
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Excitation Dependent Phosphorous Property and New Model of the Structured Green Luminescence in ZnO SCIE PubMed Scopus
期刊论文 | 2017 , 7 | SCIENTIFIC REPORTS | IF: 4.122
WoS CC Cited Count: 9 SCOPUS Cited Count: 11
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The copper induced green luminescence (GL) with two sets of fine structures in ZnO crystal has been found for several decades (i.e., R. Dingle, Phys. Rev. Lett. 23, 579 (1969)), but the physical origin of the doublet still remains as an open question up to now. In this paper, we provide new insight into the mechanism of the structured GL band in terms of new experimental findings and theoretical calculations. It is found, for the first time, that the GL signal exhibits persistent afterglow for tens of minutes after the switch-off of below-band-gap excitation light but it cannot occur under above-band-gap excitation. Such a phosphorous property may be interpreted as de-trapping and feeding of electrons from a shallow trapping level via the conduction band to the Cu-related luminescence centers where the Cu3+ ion is proposed to work as the final state of the GL emission. From first-principles calculation, such a Cu3+ ion in wurtzite ZnO prefers a high spin 3d(8) state with two non-degenerated half-filled orbitals due to the Jahn-Teller effect, probably leading to the double structures in photoluminescence spectrum. Therefore, this model gives a comprehensively new understanding on the mechanism of the structured GL band in ZnO.

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GB/T 7714 Ye, Honggang , Su, Zhicheng , Tang, Fei et al. Excitation Dependent Phosphorous Property and New Model of the Structured Green Luminescence in ZnO [J]. | SCIENTIFIC REPORTS , 2017 , 7 .
MLA Ye, Honggang et al. "Excitation Dependent Phosphorous Property and New Model of the Structured Green Luminescence in ZnO" . | SCIENTIFIC REPORTS 7 (2017) .
APA Ye, Honggang , Su, Zhicheng , Tang, Fei , Wang, Mingzheng , Chen, Guangde , Wang, Jian et al. Excitation Dependent Phosphorous Property and New Model of the Structured Green Luminescence in ZnO . | SCIENTIFIC REPORTS , 2017 , 7 .
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Modulation instability of a spin-1 Bose-Einstein condensate with spin-orbit coupling EI SCIE Scopus
期刊论文 | 2017 , 50 (23) | JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | IF: 2.119
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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We investigate the modulation instability (MI) of plane-wave states in a spin-orbit-coupled spin-1 Bose-Einstein condensate (BEC). The MI of the system can be adjusted by the intensities of the spin-orbit coupling (SOC), Raman coupling and atom-atom interactions. Our analysis shows that the MI of a system without the SOC and Raman coupling mainly occurs for repulsive density-density and spin-exchange interactions due to the combined effects coming from both of them. But when considering the SOC, a multi-peak structure appears in the momentum distribution for the instability, which may be thought of as a precursor to the generation of the stripe-type nonlinear excitations in such systems. The MI becomes more remarkable with increasing intensity of Raman coupling. In addition, the SOC inevitably contributes to the instability for the ternary superfluid regardless of the nature of the density-density and spin-exchange interactions.

Keyword :

spinor gases Bose-Einstein condensate modulation instability spin-orbit coupling

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GB/T 7714 Li, Guan-Qiang , Chen, Guang-De , Peng, Ping et al. Modulation instability of a spin-1 Bose-Einstein condensate with spin-orbit coupling [J]. | JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS , 2017 , 50 (23) .
MLA Li, Guan-Qiang et al. "Modulation instability of a spin-1 Bose-Einstein condensate with spin-orbit coupling" . | JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS 50 . 23 (2017) .
APA Li, Guan-Qiang , Chen, Guang-De , Peng, Ping , Li, Zhi , Bai, Xiao-Dong . Modulation instability of a spin-1 Bose-Einstein condensate with spin-orbit coupling . | JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS , 2017 , 50 (23) .
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