Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices

Xiamen, China

Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices

Xiamen, China

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Liu J.,Fujian Normal University | Liu J.,Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials | Liu J.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Xu Y.,Fujian Normal University | And 15 more authors.
Nanoscale | Year: 2016

Precisely controlling the layer number, stacking order, edge configuration, shape and structure of graphene is extremely challenging but highly desirable in scientific research. In this report, a new concept named the growth-etching method has been explored to synthesize a graphene ring using the chemical vapor deposition process. The graphene ring is a hexagonal structure, which contains a hexagonal exterior edge and a hexagonal hole in the centre region. The most important concept introduced here is that the oxide nanoparticle derived from annealing is found to play a dual role. Firstly, it acts as a nucleation site to grow the hexagonal graphene domain and then it works as a defect for etching to form a hole. The evolution process of the graphene ring with the etching time was carefully studied. In addition, a double hexagonal graphene ring was successfully synthesized for the first time by repeating the growth-etching process, which not only confirms the validity and repeatability of the method developed here but may also be further extended to grow unique graphene nanostructures with three, four, or even tens of graphene rings. Finally, a schematic model was drawn to illustrate how the double hexagonal graphene ring is generated and propagated. The results shown here may provide valuable guidance for the design and growth of unique nanostructures of graphene and other two-dimensional materials. © 2016 The Royal Society of Chemistry.


Chen G.,Fujian Normal University | Chen G.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Wang W.,Fujian Normal University | Zhao J.,Fujian Normal University | And 7 more authors.
Journal of Alloys and Compounds | Year: 2016

The future development of Cu3SbS4 as an alternative absorber for low cost and high efficiency thin film solar cell depends strongly on the understanding of the formation of mechanism in this system. With this aim, a detailed characterization of Cu3SbS4 particles prepared by microwave irradiation is presented, combining XRD, SEM, and EDX. The development of Cu3SbS4 formation with the increasement of temperature and the prolongation of time are investigated by depth-resolved analysis. Under such conditions, a reaction pathway for the formation of Cu3SbS4 from binary and CuSbS2 compounds as intermediates is proposed. The experimental data supports a formation mechanism of Cu3SbS4 that proceeds rapidly when the CuSbS2 react with the remaining binary phases CuS. During reaction Cu is completely consumed, while Sb is lost through the way of Sb2S3 vapor. © 2016 Elsevier B.V. All rights reserved.


Zhu W.,Fujian Normal University | Zhu W.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Zhuang Z.,Fujian Normal University | Zhuang Z.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | And 10 more authors.
Journal of Physics and Chemistry of Solids | Year: 2016

Hole-rich Li4Ti5O12 composites are synthesized by spray drying using carbon nanotubes as additives in precursor solution, subsequently followed calcinated at high temperature in air. The structure, morphology, and texture of the as-prepared composites are characterized with XRD, Raman, BET and SEM techniques. The electrochemical properties of the as-prepared composites are investigated systematically by charge/discharge testing, cyclic voltammograms and AC impedance spectroscopy, respectively. In comparison with the pristine Li4Ti5O12, the hole-rich Li4Ti5O12 induced by carbon nanotubes exhibits superior electrochemical performance, especially at high rates. The obtained excellent electrochemical performances of should be attributed to the hole-rich structure of the materials, which offers more connection-area with the electrolyte, shorter diffusion-path length as well faster migration rate for both Li ions and electrons during the charge/discharge process. © 2016 Elsevier Ltd.


Chen L.,Fujian Normal University | Chen L.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Weng M.,Fujian Normal University | Weng M.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | And 11 more authors.
Nanoscale | Year: 2016

Transparent actuators have been attracting emerging interest recently, as they demonstrate potential applications in the fields of invisible robots, tactical displays, variable-focus lenses, and flexible cellular phones. However, previous technologies did not simultaneously realize macroscopic transparent actuators with advantages of large-shape deformation, low-voltage-driven actuation and fast fabrication. Here, we develop a fast approach to fabricate a high-performance transparent actuator based on single-layer superaligned carbon nanotube sheet and polymer composites. Various advantages of single-layer nanotube sheets including high transparency, considerable conductivity, and ultra-thin dimensions together with selected polymer materials completely realize all the above required advantages. Also, this is the first time that a single-layer nanotube sheet has been used to fabricate actuators with high transparency, avoiding the structural damage to the single-layer nanotube sheet. The transparent actuator shows a transmittance of 72% at the wavelength of 550 nm and bends remarkably with a curvature of 0.41 cm-1 under a DC voltage for 5 s, demonstrating a significant advance in technological performances compared to previous conventional actuators. To illustrate their great potential usage, a transparent wiper and a humanoid robot "hand" were elaborately designed and fabricated, which initiate a new direction in the development of high-performance invisible robotics and other intelligent applications with transparency. © The Royal Society of Chemistry 2016.


Xie H.,Fujian Normal University | Xie H.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Xie H.,Fujian Agriculture and forestry University | Lin G.-W.,East China University of Science and Technology | And 6 more authors.
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2016

Optical nonlinearities at the single-photon level are explored in a quadratically coupled optomechanical system, where the cavity frequency is coupled to the square of the mechanical displacement. The effective nonlinear interaction between photons and phonons is enhanced by a strong driving field, which allows one to implement the single-photon nonlinearities even if the single-photon coupling strength g0 is much lower than the cavity decay rate κ. The photon statistical properties are discussed by calculating the second-order correlation function both analytically and numerically. The results show that the single-photon nonlinearities are robust against mechanical thermal noise in the strong-coupling and sideband-resolved regime, and photon blockade and photon-induced tunneling can be realized with experimentally accessible parameters. © 2016 American Physical Society.


Chen J.,Fujian Normal University | Chen J.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Zou M.,Fujian Normal University | Zou M.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | And 11 more authors.
RSC Advances | Year: 2016

NiSnO3 nanoparticles (NPs) were loaded on reduced graphene oxide (RGO) by a facile hydrothermal technique as a anode material for lithium ion batteries (LIBs). It was found that the NiSnO3/RGO anode exhibits improved LIBs performance compared to bare NiSnO3 or RGO. The NiSnO3/RGO anode can maintain a reversible capacity of 792 mA h g-1, tested at 1200 mA g-1 after 60 cycles. When the current density was lowered in a test of rate capacity, the charge capacity was completely restored after high rate cycling at 6000 mA g-1 and maintained 889 mA h g-1 at 200 mA g-1 after 115 cycles. The enhanced LIBs performance of the NiSnO3/RGO nanocomposites can be attributed to the synergistic effects between a highly loaded NiSnO3 NPs and graphene network. © 2016 The Royal Society of Chemistry.


Hong Z.,Fujian Normal University | Hong Z.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Hong J.,Fujian Normal University | Xie C.,Fujian Normal University | And 3 more authors.
Electrochimica Acta | Year: 2016

In this paper, we report a one-step and additive-free route for synthesizing hierarchical rutile TiO2 with mesocrystalline structure. The rutile TiO2 architecture constructed by oriented tiny nanorod subunits (around 5 nm in diameter) have nano/submicro hierarchical structures, nanoporous nature, a relatively large surface area and high tapped density. When the hierarchical rutile TiO2 was studied as anode material for Li-ion batteries (LIBs), they exhibited a high reversible capacity of more than 250 mAh g-1 within a voltage window of 1-3 V, superior rate capability and very good cycling stability with 220 mAh g-1 after 100 cycles at 0.1 A g-1. It's notable that the hierarchical rutile TiO2 exhibited superior Li-ion storage properties under deep cycling conditions (0.01-3.0 V), a stable capacity of 346 mAh g-1 after 100 cycles at 0.1 A g-1 could be remained. The hierarchical TiO2 also displayed a large reversible capacity of more than 255 mAh g-1 (average value) at 0.05 A g-1 and good cycling performance for Na-ion insertion. These results, in combination with high volumetric storage capacity, render hierarchical rutile TiO2 a promising anode material for rechargeable batteries. © 2016 Elsevier Ltd. All rights reserved.


Liu J.,Fujian Normal University | Liu J.,Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials | Liu J.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Huang Q.,Fujian Normal University | And 13 more authors.
Crystal Growth and Design | Year: 2016

A high degree of control over thickness, size, structure, and symmetry of two-dimensional layered materials is essential to tune their chemical and physical properties for applications. Here, we report screw dislocation-driven growth of layered spiral-type SnSe nanoplates with atomically thin helical periodicity for the first time. The spirals are composed of a few connected SnSe layers with decreasing areas; each basal plane has a rectangular shape and spirals up layer by layer to the summit center. The unique structure and growth mode were further confirmed to include herringbone contours, spiral arms, and hollow cores. In addition, the growth mode can be tuned from screw dislocation-driven growth to layer-by-layer growth by manipulating the precursor concentration. The results shown here may provide valuable guidance for the design and growth of unique nanostructures in SnSe or even other two-dimensional layered materials and promote their applications. © 2016 American Chemical Society.


Zou M.,Fujian Normal University | Zou M.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Wen W.,Fujian Normal University | Wen W.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | And 6 more authors.
Journal of Alloys and Compounds | Year: 2016

In order to overcome the intrinsic drawbacks of V2O5, including the intrinsically low electrical conductivity and slow electrochemical kinetics, V2O5 nanospheres are uniformly mixed with the electric Cu nanoparticles for forming V2O5/Cu composites. As used as an cathode material for LIBs, the V2O5/Cu composite demonstrated obviously improved electrochemical performance including high reversible specific capacity, superior rate capability and outstanding cycling stability. The V2O5/Cu cathodes can afford a high reversible capacity of 186 mAh g-1 after 70 cycles under a current density of 300 mA g-1 and good rate performance. Even at a high current density of 5 A g-1, a high reversible capacity of 101 mAh g-1 after 350 cycles can still remain. The improved performance can be contributed from the decorated Cu nanoparticles, which can result in a good contact in active materials and facilitate transportation of the electron into the inner region of the electrode. © 2016 Elsevier B.V. All rights reserved.


Xie H.,Fujian Normal University | Xie H.,Fujian Prov Collaborative Innovation Center For Optoelectronic Semiconductors And Efficient Devices | Xie H.,Fujian Agriculture and forestry University | Chen X.,Fujian Normal University | And 4 more authors.
Optics Communications | Year: 2016

A scheme to correlate optical and microwave photons is proposed in a hybrid electro-optomechanical system, where mechanical resonator is coupled to both optical and microwave fields. Analytical and numerical simulation results show that the cross-correlation function between Stokes and anti-Stokes photons strongly violates the Cauchy-Schwarz inequality, which confirms the nonclassical correlation between the optical and microwave photons. It is worth noting that the nonclassical photon pairs with vast different wavelengths, which may be useful for quantum communication, are generated under the experimentally accessible weak coupling limit rather than single-photon strong coupling regime. In addition, the protocol provides a possible route to combine the respective advantages of optical photons, microwave photons, and phonons in a hybrid electro-optomechanical system. © 2016 Elsevier B.V. All rights reserved.

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