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  • AIP Publishing  (25)
  • 2015-2019  (25)
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  • AIP Publishing  (25)
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  • 2015-2019  (25)
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  • 1
    Online Resource
    Online Resource
    Excellent performances of energy harvester using cantilever driving double-clamped 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 plates and symmetric middle-stops
    AIP Publishing ; 2015
    In:  Applied Physics Letters Vol. 107, No. 17 ( 2015-10-26)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 107, No. 17 ( 2015-10-26)
    Abstract: We present a high performance nonlinear piezoelectric energy harvester constituted by a cantilever with symmetrically middle-stops and double-clamped piezoelectric plates based on piezoelectric single crystal 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3. Electrical properties of the device under different excitation frequencies, accelerations, and load resistances are studied systematically. Under a low acceleration of 3 m/s2 (0.3 g), a peak voltage of 26.2 V and a maximum normalized power of 25.6 mW/g2 were obtained across a matching impedance of 600 kΩ with favorable bandwidths. The low excitation acceleration and excellent performances indicate that the device can be a promising candidate for energy harvesting in low-power electronics and wireless sensors.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4934700
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2015
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Van der Waals epitaxy of ultrathin α-MoO3 sheets on mica substrate with single-unit-cell thickness
    AIP Publishing ; 2016
    In:  Applied Physics Letters Vol. 108, No. 5 ( 2016-02-01)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 108, No. 5 ( 2016-02-01)
    Abstract: We report on van der Waals epitaxy of single-crystalline α-MoO3 sheets with single-unit-cell thickness on the mica substrate. The crystalline lattice structure, growth habits, and Raman spectra of the grown α-MoO3 sheets are analyzed. The anisotropic growth of α-MoO3 sheets can be understood by period bond chains theory. Unlike monolayer MoS2 or graphene, Raman spectra of α-MoO3 do not possess frequency shift from bulk crystal to single-unit-cell layer. The relative intensities of two Raman modes (Ag) at 159 and 818 cm−1 are sensitive to the polarization of incident light. This scenario provides a quick approach to determine the lattice orientation of α-MoO3 crystals. Our studies indicate that van der Waals epitaxial growth is a simple and effective way to fabricate high-quality ultrathin α-MoO3 sheets for physical property investigations and potential applications.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4941402
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 3
    Online Resource
    Online Resource
    Atomic structures and local electronic properties of K- and Rh-modified ceria/Pt(111) inverse model catalysts
    AIP Publishing ; 2019
    In:  The Journal of Chemical Physics Vol. 151, No. 18 ( 2019-11-14)
    Details
    In: The Journal of Chemical Physics, AIP Publishing, Vol. 151, No. 18 ( 2019-11-14)
    Abstract: Ceria has been widely applied as a support in heterogeneous catalysis due to its unique capability to store and release oxygen. As a typical inverse model catalyst, a ceria/Pt(111) system has attracted much attention due to its strong metal-oxide interaction. The structural and electronic properties of the ceria/Pt(111) system can be effectively modified by the introduction of alien K and Rh atoms. Here, the K- and Rh-modified ceria/Pt(111) inverse model catalysts have been investigated with high resolution scanning tunneling microscopy and apparent local work function measurement. The experimental results indicate that the K atoms prefer to occupy the top sites of the stoichiometric ceria, while the Rh atoms are prone to stay at the electron-rich ceria island edges. The K and Rh atoms act as an electron donor and acceptor on ceria/Pt(111), respectively. Such a study on the modification of the ceria-based catalysts should help understand strong metal-oxide interaction in heterogeneous catalysis at the atomic level.
    Type of Medium: Online Resource
    ISSN: 0021-9606 , 1089-7690
    URL: Article
    DOI: 10.1063/1.5128960
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 3113-6
    detail.hit.zdb_id: 1473050-9
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Bimetallic RuM (M=Co, Ni) Alloy NPs Supported on MIL-110(Al): Synergetic Catalysis in Hydrolytic Dehydrogenation of Ammonia Borane
    AIP Publishing ; 2018
    In:  Chinese Journal of Chemical Physics Vol. 31, No. 1 ( 2018-02-27), p. 99-110
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 31, No. 1 ( 2018-02-27), p. 99-110
    Abstract: By adjusting various Ru/M (M=Co, Ni) molar ratios, a series of highly dispersed bimetallic RuM alloy nanoparticles (NPs) anchored on MIL-110(Al) have been successfully prepared via a conventional impregnation-reduction method. And they are first used as heterogeneous catalysts for the dehydrogenation reaction of AB at room temperature. The results reveal that the as-prepared Ru1Co1@MIL-110 and Ru1Ni1@MIL-110 exhibit the highest catalytic activities in different RuCo and RuNi molar ratios, respectively. It is worthy of note that the turnover frequency (TOF) values of Ru1 Co1@MIL-110 and Ru1Ni1@MIL-110 catalysts reached 488.1 and 417.1 mol H2 min−1 (mol Ru)−1 and the activation energies (Ea) are 31.7 and 36.0 kJ/mol, respectively. The superior catalytic performance is attributed to the bimetallic synergistic action between Ru and M, uniform distribution of metal NPs as well as bi-functional effect between RuM alloy NPs and MIL-110. Moreover, these catalysts exhibit favorable stability after 5 consecutive cycles for the hydrolysis of AB.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1063/1674-0068/31/cjcp1707137
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 2381472-X
    SSG: 6,25
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  • 5
    Online Resource
    Online Resource
    Elastic properties of single crystal hydrogen sulfide: A Brillouin scattering study under high pressure-temperature
    AIP Publishing ; 2018
    In:  Journal of Applied Physics Vol. 124, No. 12 ( 2018-09-28)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 124, No. 12 ( 2018-09-28)
    Abstract: We have performed high pressure-temperature Brillouin scattering measurements on single crystal hydrogen sulfide using externally heated diamond anvil cell techniques. The pressure dependences of the acoustic velocities, isothermal elastic constants, and moduli of single crystal hydrogen sulfide have been determined along four isotherms. Both elastic constants and moduli increase monotonously with pressure along each isotherm, while they show a decreased tendency with temperature elevated under the same pressure points. The experimental equation of state of single crystal hydrogen sulfide is obtained by fitting with a third-order Birch-Murnaghan and Tait equation. It is proposed that the effect of hydrogen bonds contributes to the unique tendency of elastic anisotropy in single crystal hydrogen sulfide. Through our work, we have extended the melting curve and phase diagram of hydrogen sulfide up to 12 GPa and 580 K.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.5040399
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2018
    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
    Low-cost carbonized kelp for highly efficient solar steam generation
    AIP Publishing ; 2019
    In:  AIP Advances Vol. 9, No. 5 ( 2019-05-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 9, No. 5 ( 2019-05-01)
    Abstract: Using abundant solar energy to generate steam offers unique solution overcoming the lack of freshwater resources. Despite extensive explorations, low-cost devices with high efficiency are still critically wanting. In this work, the extremely cheap carbonized kelp with good stability, high solar absorption (∼93%), porous microstructure, and hydrophilic surface is found to be efficient for solar steam generation (SSG) and seawater desalination for the first time. A SSG device meeting the requirements of the “most stable triangle” is thus designed. The carbonized kelp is utilized as the solar absorber, with thermal insulation by an expanded polystyrene foam and water supply by a fiber cotton wick via the capillary force. A high solar to steam conversion efficiency of 84.8% and evaporation rate of 1.351 kg·m-2·h-1 are attained under 1 sun irradiation. This work develops a promising and bioinspired device with long-term stability for SSG that can be produced economically (∼3.8 $/m2).
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/1.5096295
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2583909-3
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  • 7
    Online Resource
    Online Resource
    Thickness-dependent electronic structure modulation of ferromagnetic films on shape memory alloy substrates based on a pure strain effect
    AIP Publishing ; 2016
    In:  Applied Physics Letters Vol. 109, No. 21 ( 2016-11-21)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 109, No. 21 ( 2016-11-21)
    Abstract: Pure strain-induced electronic structure modulation in ferromagnetic films is critical for developing reliable strain-assisted spintronic devices with low power consumption. For the conventional electricity-controlled strain engineering, it is difficult to reveal the pure strain effect on electronic structure tunability due to the inseparability of pure strain effect and surface charge effect. Here, a non-electrically controlled NiTi shape memory alloy was utilized as a strain output substrate to induce a pure strain on attached Fe films through a thermally controlled shape memory effect. The pure strain induced electronic structure evolution was revealed by in-situ X-ray photoelectron spectroscopy and correlated with first-principles calculations and magnetic anisotropy measurements. A compressive strain enhances the shielding effect for core electrons and significantly tunes their binding energy. Meanwhile, the strain modifies the partial density of states of outer d orbits, which may affect spin-orbit coupling strength and related magnetic anisotropy. This work helps for clarifying the physical nature of the pure strain effect and developing the pure-strain-assisted spintronic devices.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4967996
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 8
    Online Resource
    Online Resource
    A plastic-composite-plastic structure high performance flexible energy harvester based on PIN-PMN-PT single crystal/epoxy 2-2 composite
    AIP Publishing ; 2017
    In:  Applied Physics Letters Vol. 110, No. 10 ( 2017-03-06)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 110, No. 10 ( 2017-03-06)
    Abstract: We present a high performance flexible piezoelectric energy harvester constituted by a Pb(In1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 (PIN-PMN-PT) single crystal/epoxy 2-2 composite flake, a polyethylene terephthalate (PET) substrate, and a PET cover, which is capable of harvesting energy from biomechanical movements. Electrical properties of the device under different epoxy volume fractions, load resistances, and strains are studied systematically. Both theoretical and experimental results show that the plastic-composite-plastic structure contributes to the flexibility of the device, and a high performance bulk PIN-PMN-PT single crystal (a thickness of 50 μm) results in its high electrical output. At a low excitation frequency of 4.2 Hz, the optimal flexible energy harvester (with ve = 21%) can generate a peak voltage of 12.9 V and a maximum power density of 0.28 mW/cm3 under a bending radius of 10.5 mm, and maintain its performance after 40 000 bending-unbending cycles. High flexibility and excellent electrical output at low operational frequency demonstrate the promise of the device in biomechanical motion energy harvesting for wireless and portable low-power electronics.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4977938
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2017
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 9
    Online Resource
    Online Resource
    A bi-layered quad-band metamaterial absorber at terahertz frequencies
    AIP Publishing ; 2015
    In:  Journal of Applied Physics Vol. 118, No. 24 ( 2015-12-28)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 118, No. 24 ( 2015-12-28)
    Abstract: In this work, a quad-band metamaterial absorber is proposed and experimentally demonstrated at terahertz frequency using a bi-layer isotropic structure. The absorber is designed by distributing four metallic square loops with different lengths on two polyimide layers (PI). The backside of PI is covered by an opaque gold film to eliminate the transmission of terahertz waves. The proposed absorber exhibits almost unity absorptions at 0.51, 0.69, 1.05, and 1.34 THz under the normal illuminance. As the incident angle increases from 0° to 50°, the absorption intensities remain above 95%, and the absorption frequencies almost keep stable for both transverse-electric and transverse-magnetic polarizations. The absorption mechanism is interpreted by giving the electromagnetic field distributions at each absorption peak. Experimental results show good agreement with numerical simulations both in the frequency and strength of the four absorption peaks.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4938110
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2015
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 10
    Online Resource
    Online Resource
    Visualization of deep ultraviolet photons based on Förster resonance energy transfer and cascade photon reabsorption in diphenylalanine-carbon nitrides composite film
    AIP Publishing ; 2016
    In:  Applied Physics Letters Vol. 109, No. 19 ( 2016-11-07)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 109, No. 19 ( 2016-11-07)
    Abstract: A diphenylalanine (L-Phe-L-Phe, FF)-carbon nitride composite film is designed and fabricated to visualize the deep ultraviolet (DUV, 245–290 nm) photons. The FF film, composed of diphenylalanine molecules, doped with carbon nitrides shows blue emission under excitation of DUV light, which makes the DUV beam observable. Both Förster resonance energy transfer and cascade photon reabsorption contribute to the conversion of photon energy. First, the FF is excited by the DUV photons. On one hand, the energy transfers to the embedded carbon nitrides through nonradiative dipole–dipole couplings. On the other hand, the 284 nm photons emitted from the FF would further excite the carbon nitrides, which will finally convert to blue fluorescence. Herein, the experimental demonstration of a simple device for the visualization of high DUV fluxes is reported.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4967503
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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