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  • AIP Publishing  (7,143)
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  • 1
    Online Resource
    Online Resource
    Highly Sensitive Silver Nanorod Arrays for Rapid Surface Enhanced Raman Scattering Detection of Acetamiprid Pesticides
    AIP Publishing ; 2018
    In:  Chinese Journal of Chemical Physics Vol. 31, No. 2 ( 2018-04-27), p. 152-158
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 31, No. 2 ( 2018-04-27), p. 152-158
    Abstract: The determination of pesticide residue on agricultural products is increasingly important. Exposure to pesticides can cause severe acute reactions in humans, including aplastic anemia and leukemia. In this work, we developed a rapid and sensitive method to detect acetamiprid pesticide residue based on surface-enhanced Raman scattering. Silver nanorod (AgNR) arrays were fabricated by oblique angle deposition technology and were used as SERS substrates. Prior to detection, the AgNR arrays were cleaned with nitric acid solution or a mixture of methanol and acetone. Compared to the unwashed AgNR arrays, the AgNR arrays washed with methanol and acetone shows a signal enhancement 1000 times greater than the unwashed AgNR array due to the effective removal of the impurities on its surface. The limit of detection of acetamiprid was determined to be 0.05 mg/L. In addition, the molecular structure of acetamiprid was simulated and the corresponding vibration modes of the characteristic bands of acetamiprid were calculated by density function theory. To demonstrate its practical application, the AgNRs array substrates were applied successfully to the rapid identification of acetamiprid residue on a cucumber's surface. These results confirmed possibility of utilizing the AgNRs SERS substrates as a new method for highly sensitive pesticide residue detection.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1063/1674-0068/31/cjcp1710184
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 2381472-X
    SSG: 6,25
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  • 2
    Online Resource
    Online Resource
    Cerium doped LiNi0.5Mn1.5O4 composite with improved high temperature performance as a cathode material for Li-ion batteries
    AIP Publishing ; 2019
    In:  AIP Advances Vol. 9, No. 2 ( 2019-02-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 9, No. 2 ( 2019-02-01)
    Abstract: To investigate the effect of Ce doping on structure and the electrochemical properties of spinel LiNi0.5Mn1.5O4, especially the cycling performance at high temperature, spinel cathode materials LiNi0.5-0.5xMn1.5-0.5xCexO4 (x = 0, 0.01, 0.02, 0.03) were prepared by the sol-gel method for use in lithium ion batteries. For this purpose a half-cell was assembled with a lithium metal anode and a full-cell was paired with graphite. The characterization and analysis of the prepared LiNi0.5-0.5xMn1.5-0.5xCexO4 (x = 0, 0.01, 0.02, 0.03) composites revealed that all of the samples had a disordered spinel octahedron structure, and that the purity of the phase increased after appropriate Ce doping. Compared to the pristine sample, the prepared LiNi0.495Mn1.495Ce0.02O4, (x = 0.02) had outstanding electrochemical performance with an initial capacity of 133.8 mAh/g, and 131.9 mAh/g at 1 C and 55 °C after 50 cycles, and maintained a capacity retention value of 98.6% at 1 C and 25 °C at the 100th cycle. The introduction of Ce as dopant improved the electrochemical performance of LiNi0.5Mn1.5O4 as a result of the synergistic effects of stronger structural stability, higher lithium ion diffusion coefficient, and lower electrochemical polarization.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/1.5082585
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2583909-3
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  • 3
    Online Resource
    Online Resource
    The influence of thermal parameters on the temperature distribution and output parameters of c-Si solar cell under actual test conditions
    AIP Publishing ; 2022
    In:  AIP Advances Vol. 12, No. 5 ( 2022-05-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 12, No. 5 ( 2022-05-01)
    Abstract: The accurate measurement of the output parameters of photovoltaic (PV) cells is a key step in building a PV system. The output parameters of a PV cell under actual test conditions will appear different degrees of the deviation from those under the standard test conditions. In this work, we are primarily concerned with the deviations of the temperature distributions and output parameters of a testing c-Si solar cell caused by the heat transfer process under actual test conditions. The results show that the temperature distributions of c-Si solar cells under actual test conditions will be uneven and obviously deviate from those under the standard test conditions; the heat transfer coefficients at the interfaces between the front surface and environmental air and between the back surface and mental holder have important consequences for the temperature distributions of c-Si solar cells; under the actual test conditions of PV enterprises, the possible deviation range of short-circuit current density, open-circuit voltage, filling factor, and efficiency may be from −17 to 9 µA/cm2, from −11 to 17 mV, from −0.4% to 0.7%, and from −0.4% to 0.7%, respectively.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/5.0085215
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2583909-3
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  • 4
    Online Resource
    Online Resource
    Left-handed materials made of dilute ferromagnetic wire arrays with gyrotropic tensors
    AIP Publishing ; 2007
    In:  Journal of Applied Physics Vol. 102, No. 2 ( 2007-07-15)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 102, No. 2 ( 2007-07-15)
    Abstract: In this article, we theoretically investigate properties of normally incident microwave propagation in dilute metallic ferromagnetic wire array (DMFWA) slabs with gyrotropic tensors. It is found that DMFWA may become left-handed materials (LHM) in a narrow frequency range below the plasma frequency, even the real part of the corresponding inversion permeability element is positive. Comparing with the isotropic materials having same diagonal permeability elements, due to existence of off-diagonal elements of the gyrotropic permeability tensor, the DMFWA becomes a LHM in a higher frequency range depended on its geometric structure. In addition, E, H, and wave vector Re(k) of microwave propagating in the DMFWA form an approximately left-handed triplet of vectors.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.2759180
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2007
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 5
    Online Resource
    Online Resource
    Electronic structures and properties of lanthanide hexaboride nanowires
    AIP Publishing ; 2013
    In:  Journal of Applied Physics Vol. 114, No. 14 ( 2013-10-14)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 114, No. 14 ( 2013-10-14)
    Abstract: The promising usage of lanthanide hexaboride nanowires as excellent electron emitter materials is generally attributed to the intrinsic low work functions of their bulk counterparts. Most analytical models for the field enhanced electron emission phenomenon adopt an underlying presumption of little or no change to the work function of the emission materials at the nanoscale. However, such a presumption is difficult to experimentally verify because current analytical models often employ empirical parameters such as the geometrically enhancement factors and the actual field emission areas are hard to determine. Herein, we report our density functional theory study of the size-dependence and element-specificity of the electronic structures and work functions of infinitely long lanthanide hexaboride nanowires constructed with n × n × ∞ unit cells (n = 1, 2, 3, and 4). Our modeling results reveal that the distinguished metal-like electronic properties and the low work function values of the sides of most examined nanowire systems are due to the abundant 4f and 5d states from the lanthanide metal atoms positioned at the Fermi level. These work function values are found to be weakly wire-size-dependent and element-dependent across the lanthanide series. They approach to the bulk values when their lateral wire-sizes are at or above 4-unit cell wide. The presence of abundance states at the Fermi level is found to be a common feature to rationalize the work functions of reported hexaboride systems.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4824285
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2013
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 6
    Online Resource
    Online Resource
    Electrode area dependent switching behavior of Ge2Sb2Se4Te1 phase change material driven by narrow voltage pulse
    AIP Publishing ; 2023
    In:  Applied Physics Letters Vol. 122, No. 24 ( 2023-06-12)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 122, No. 24 ( 2023-06-12)
    Abstract: As a recently studied phase change material, Ge2Sb2Se4Te1 (GSST) shows excellent potential in the application of optical devices, because it presents very low loss in the amorphous state within the optical communication wavelength of 1550 nm and exhibits significant differences in optical properties before and after phase change. However, it is still challenging that, in real GSST devices, phase change switching is driven by narrow voltage pulse. In this study, the sandwich structures of GSST film with different electrode areas were prepared to analyze the phase change switching performance between crystalline and amorphous states. The results show that the endurance cycling of phase change switching increases with decreasing electrode area. When the electrode radius is 1 μm, the phase change switching number can reach 10 000. The improvement of this phase change switching can be attributed to the temperature uniformity, which was verified by the simulation of electrical pulse heating.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0149514
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 7
    Online Resource
    Online Resource
    Enhanced Photoelectrochemical Property of Zn Loaded TiO2 Nanotube Arrays Electrode
    AIP Publishing ; 2010
    In:  Chinese Journal of Chemical Physics Vol. 23, No. 1 ( 2010-02-01), p. 113-116
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 23, No. 1 ( 2010-02-01), p. 113-116
    Abstract: TiO2 nanotube arrays (TNTs) electrode loaded with Zn nanoparticles was prepared by anodization and the size of Zn nanoparticle loaded on TNTs electrode was controlled by chronoamperometry deposition time. Results of SEM and XRD analysis show that Zn nanoparticles had a diameter of about 15–25 nm when the deposition time was 3–5 s. The UV-Vis diffuse reflectance spectra show the Zn loaded harvest light with 480–780 nm more effectively than the unloaded sample. The photocurrent response of Zn loaded TNTs electrodes were studied, the results showed that TNTs electrodes loaded with Zn nanoparticles has 50% increased photocurrent response under high-pressure mercury lamp irradiation compared with unloaded TNTs electrode.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1088/1674-0068/23/01/113-116
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2010
    detail.hit.zdb_id: 2381472-X
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  • 8
    Online Resource
    Online Resource
    Non-polar p -type Zn0.94Mn0.05Na0.01O texture: Growth mechanism and codoping effect
    AIP Publishing ; 2013
    In:  Journal of Applied Physics Vol. 113, No. 8 ( 2013-02-28)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 113, No. 8 ( 2013-02-28)
    Abstract: The microstructure and crystal orientations of polycrystalline films crucially affect the properties and performance of the films. Controlling preferred orientations (PO) and related film morphology are necessary to obtain the desirable properties. In this paper, we demonstrate a rational and effective route toward the realization of non-polar p-type ZnO thin film with surface texture on quartz substrate through Mn-Na codoping. It is uncovered experimentally and theoretically that mono-doping of Mn creates opportunity to realize PO from polar (c-axis) to non-polar ((101¯0), (101¯1), and (112¯0)) changing. With Mn-Na codoping, an acute modulation of the growth behavior and electrical conductivity of the film have been revealed, leading to weak p-type non-polar Zn0.94Mn0.05Na0.01O (ZMNO) texture. The dominant mechanism for the non-polar self-texture in the current paper is deliberately elucidated as resulting from the interplane surface diffusion with the cooperative effect of impurity dopants. The ZMNO films exhibit p-type conduction with hole concentration of 9.51 × 1015–1.86 × 1017 cm−3 and enhanced room temperature (RT) ferromagnetism possessing a saturation magnetization (Ms) of 1.52 μB/Mn. The results have potential applications in development of non-polar optoelectronic devices such as lighting emitting diodes (LEDs).
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4792493
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2013
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 9
    Online Resource
    Online Resource
    LiNbO3 phase gratings prepared by a single excimer pulse through a silica phase mask
    AIP Publishing ; 1996
    In:  Applied Physics Letters Vol. 69, No. 10 ( 1996-09-02), p. 1352-1354
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 69, No. 10 ( 1996-09-02), p. 1352-1354
    Abstract: A transmission silica phase mask grating was used to fabricate LiNbO3 wafer phase gratings by a single excimer pulse at 248 nm. The morphologies of the LiNbO3 wafer gratings were studied with an atomic force microscope as well as an optical microscope. The crystal structures of the gratings were characterized by x-ray diffraction and three new crystal phases were found at the gratings’ surface besides the substrate phase of LN (110).
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.117433
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1996
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 10
    Online Resource
    Online Resource
    Effects of He-ion bombardment on the ferroelectric and dielectric properties of BaHf0.17Ti0.83O3 films
    AIP Publishing ; 2022
    In:  Applied Physics Letters Vol. 121, No. 7 ( 2022-08-15)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 121, No. 7 ( 2022-08-15)
    Abstract: Focused helium ion bombardment provides an effective means to modify the properties of ferroelectric materials. This work systematically investigates the effect of helium ion bombardment on the structural, ferroelectric, and dielectric properties of relaxor BaHf0.17Ti0.83O3 thin films at different bombardment doses in the range of 1 × 1012 to 7 × 1015 ions/cm2. The films show more defects and slightly expanded out-of-plane lattice parameters with an increase in dose. Despite helium ion bombardment introducing more defects and structural disorder in the system, the bombardment-induced dipole polarization leads to enhanced ferroelectricity. Our findings highlight energetic helium ion bombardment as an effective way to enhance the ferroelectricity of relaxor materials.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0107438
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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