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  • AIP Publishing  (10)
  • 1
    Online Resource
    Online Resource
    Silver-decorated cobalt–molybdenum oxide nanosheets as a pH-universal electrocatalyst for high-efficiency hydrogen evolution reaction
    AIP Publishing ; 2023
    In:  Applied Physics Letters Vol. 122, No. 12 ( 2023-03-20)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 122, No. 12 ( 2023-03-20)
    Abstract: The high efficiency of hydrogen evolution reaction (HER) catalysts depends on their electronic structure, conductivity, and intrinsic catalytic activity. Transition-metal oxides (TMO) present a great potential to replace platinum-based catalysts, but further improvements in intrinsic catalytic activity are limited to the materials' conductivity. Herein, theoretical calculations disclosed that the adjusted density of states around the Fermi level caused by Ag introduction increased the conductivity of Co2Mo3O8-Ag, optimizing the water adsorption energy (ΔEad) and Gibbs free energy of hydrogen adsorption (ΔGH*). This can be rationalized through the synergistic effect between electron-rich Co and Mo sites in Co2Mo3O8-Ag. Inspired by this, Ag nanoparticles loaded on Co2Mo3O8 nanosheets (CMO-Ag) as a pH-universal HER catalyst were successfully constructed. As expected, the prepared CMO-Ag catalyst exhibited excellent HER activity with overpotentials of 55.5, 63.2, and 68.2 mV at a current density of 10 mA cm−2 in alkaline, neutral, and acidic electrolyte, respectively, superior to most reported results from molybdenum/cobalt-based electrocatalyst. Meanwhile, the CMO-Ag also presented exceptional stability with negligible change after 20 h of stability tests and 1000 cycles of CV measurements. This work provides a valuable strategy for optimizing catalytic activity sites and improving conductivity through combining metal nanoparticles and TMO, which can be applied for other TMO-based HER pH-universal catalyst.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0139102
    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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  • 2
    Online Resource
    Online Resource
    Cation effect of inorganic salts on ionic Seebeck coefficient
    AIP Publishing ; 2021
    In:  Applied Physics Letters Vol. 118, No. 10 ( 2021-03-08)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 118, No. 10 ( 2021-03-08)
    Abstract: Ionic thermoelectric materials attract widespread attention due to their large Seebeck coefficient compared with electronic thermoelectric counterparts whose main charge carriers are electrons or holes. The present work shows that the ion-polymer matrix interaction can alter the Seebeck coefficient to a great extent. To further shed light on the role of ions, seven water-soluble inorganic chlorides are utilized in this work, to highlight the influence of the cationic softness parameter on the Seebeck coefficient in a PEDOT:PSS ionic conductor. We notice that cations with a positive or a small negative softness parameter value exhibit a negative Seebeck coefficient, resulting from limited thermal diffusion of the cations that are strongly bound to PSS- anions. Conversely, cations with a sufficiently negative softness parameter exhibit fast thermal diffusion due to weak binding to PSS- and, thus, lead to a positive Seebeck coefficient. Based on the established relationship, robust thermoelectric materials with a tunable Seebeck coefficient ranging from –9.63 mV/K to +3.07 mV/K are demonstrated. Our work highlights the important role of ionic properties and provides a pathway for the rational selection of ions in ionic thermoelectrics.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0043498
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 3
    Online Resource
    Online Resource
    Anharmonic lattice dynamics of SnS across phase transition: A study using high-dimensional neural network potential
    AIP Publishing ; 2021
    In:  Applied Physics Letters Vol. 119, No. 6 ( 2021-08-09)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 119, No. 6 ( 2021-08-09)
    Abstract: SnS that exhibits strong lattice anharmonicity and a structural phase transition between the Pnma and Cmcm phases has emerged as a high-performance thermoelectric material. Herein, the lattice dynamics of SnS have been investigated by molecular dynamics to reveal the soft mode mechanisms across the phase transition. We construct a first-principles-based machine-learning potential, which is capable of reproducing the dynamical nature of the structural phase transition of SnS. We reproduce an explicit softening of the zone-center phonon mode and unveil a similar behavior at the zone boundary U = (0.5, 0.0, 0.5) of SnS, which are attributed to the large anharmonicity induced by the phase transition. Our results reveal a non-monotonic temperature dependence of the linewidth of the soft modes beyond the perturbative regime. The zone-center optical soft mode collapses across the structural phase transition, corresponding to a second-order nature. These results pave the way for further phonon engineering of SnS and the related IV–VI thermoelectrics.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0056317
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 4
    Online Resource
    Online Resource
    Avalanche transition with super-bandwidth magnetic field response in (La0.73Bi0.27)0.67Ca0.33MnO3
    AIP Publishing ; 2013
    In:  Applied Physics Letters Vol. 102, No. 19 ( 2013-05-13)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 102, No. 19 ( 2013-05-13)
    Abstract: The magnetic and electrical behaviors of an optimizing doping (La0.73Bi0.27)0.67Ca0.33MnO3 were investigated. An avalanche transition with a super-bandwidth of magnetic field response, in which the magnetic field sweep rate ranging from 10 Oe/s to 4886.8 T/s, was observed in the manganite. The insensitivity of the critical field of the avalanche transition to the magnetic field weep rates could not be described well within the framework of martensitic transition scenario. Based on the hybridization between the Bi3+-6s lone pair electrons and O2–2p electrons, we assume that the observed super-bandwidth avalanche transition is an intrinsic behavior resulting from the s-p hybridization. The robust transition makes the material extremely attractive for potential applications in super-bandwidth magnetic field response sensor. The simple structure of the current system also provides an ideal platform for understanding the physics underlying the avalanche transition.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4805006
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2013
    detail.hit.zdb_id: 211245-0
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  • 5
    Online Resource
    Online Resource
    Flexible perovskite solar cells: Material selection and structure design
    AIP Publishing ; 2022
    In:  Applied Physics Reviews Vol. 9, No. 2 ( 2022-06-01)
    Details
    In: Applied Physics Reviews, AIP Publishing, Vol. 9, No. 2 ( 2022-06-01)
    Abstract: With the rapid development of the Internet of Things, convenient and portable self-powered devices are in great need. Among all substitutes that could provide clean and sustainable power, the flexible perovskite solar cells (FPSCs) are the most attractive with the characteristics of flexibility, lightweight, high power conversion efficiency, and low cost. In this review, the recent advances of FPSCs are summarized, focusing on the materials' assessment of flexible and durable substrate, transparent electrode, low-temperature processed charge transporting layer, and mechanically robust perovskite film, with device design interspersed in each part. Finally, the challenges of FPSCs in terms of higher efficiency, higher flexibility, higher stability, and scalable fabrication are summarized.
    Type of Medium: Online Resource
    ISSN: 1931-9401
    URL: Article
    DOI: 10.1063/5.0084596
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2265524-4
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  • 6
    Online Resource
    Online Resource
    Multiple Plasmonic Resonances and Cascade Effect in Asymmetrical Ag Nanowire Homotrimer
    AIP Publishing ; 2016
    In:  Chinese Journal of Chemical Physics Vol. 29, No. 4 ( 2016-08-27), p. 489-496
    Details
    In: Chinese Journal of Chemical Physics, AIP Publishing, Vol. 29, No. 4 ( 2016-08-27), p. 489-496
    Abstract: Plasmonic Ag nanowire homotrimer with asymmetrical radii and separations, which exhibits characteristics of multiple plamonic resonances and different electric field distributions, is systematically investigated by means of 2D finite element method. It was found that the dark and bright modes appear in asymmetrical nanowire homotrimer. In addition, when the dark modes appear between the smaller radii of the nanowires, the cascade effect results in enhanced electric field between the smaller radii nanowires. As a result of the appearance of the bright modes between the smaller radii of the nanowires, the restriction of the cascade effect generates enhanced electric field between the bigger nanowires.
    Type of Medium: Online Resource
    ISSN: 1674-0068 , 2327-2244
    URL: Article
    DOI: 10.1063/1674-0068/29/cjcp1602030
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 2381472-X
    SSG: 6,25
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  • 7
    Online Resource
    Online Resource
    Synthesis and enhanced nonlinear optical properties of graphene/CdS organic glass
    AIP Publishing ; 2013
    In:  Applied Physics Letters Vol. 102, No. 3 ( 2013-01-21)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 102, No. 3 ( 2013-01-21)
    Abstract: Graphene/CdS (G/CdS) nanocomposite was first fabricated by a hydrothermal method. G/CdS nanocomposite was then dispersed in polymethyl methacrylate (PMMA) for preparation of organic glass by a casting method. The G/CdS/PMMA organic glass exhibits enhanced nonlinear optical (NLO) properties compared to G/PMMA and CdS/PMMA organic glass. Moreover, NLO properties of the G/CdS/PMMA organic glass can be controlled by adjusting the addition amount of G/CdS nanocomposite in PMMA. Our results demonstrate that the G/CdS/PMMA organic glass is very promising for optical devices, such as optical limiters and optical switch.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4789367
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2013
    detail.hit.zdb_id: 211245-0
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  • 8
    Online Resource
    Online Resource
    Magnetoelectric response of AlN/[(Fe90Co10)78Si12B10 + Terfenol-D] composite films
    AIP Publishing ; 2014
    In:  Journal of Applied Physics Vol. 115, No. 17 ( 2014-05-07)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 115, No. 17 ( 2014-05-07)
    Abstract: The magnetoelectric (ME) composite films composed of piezoelectric layer AlN film and new magnetostrictive layer [(Fe90Co10)78Si12B10 + Terfenol-D] films were successfully prepared by RF magnetron sputtering. The influence of bias magnetic field Hdc on ME response, as well as, the ac magnetic field sensitivity were investigated in detail. The results demonstrated that the respective magnetic properties of (Fe90Co10)78Si12B10 and Terfenol-D films are coupled in this new magnetostrictive layer, resulting in the fact that ME voltage coefficient αME reaches the maximum of 78.1 V/cm Oe and 77.5 V/cm Oe at the bias field of 11 Oe and 96 Oe, respectively. Meanwhile, the composite films display ac magnetic field sensitivity of 0.45 nT/√Hz and 0.47 nT/√Hz at Hdc of 11 Oe and 96 Oe, respectively. The results above indicate that the AlN/[(Fe90Co10)78Si12B10 + Terfenol-D] composite films exhibit a promising potential application in diverse range of magnetic field detection.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4863487
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2014
    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
    Weak magnetic interaction, large magnetocaloric effect, and underlying spin model in triangular lattice GdFeTeO6
    AIP Publishing ; 2018
    In:  Journal of Applied Physics Vol. 124, No. 23 ( 2018-12-21)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 124, No. 23 ( 2018-12-21)
    Abstract: The nature of 4f-3d magnetic interaction in oxides as well as its influence on the magnetocaloric effect (MCE) is an interesting topic. Here, we report the weak magnetic interaction and large MCE in a new triangular lattice GdFeTeO6 synthesized by the solid state reaction method. The weak exchange, which was seldom observed in 4f-3d oxides, is supported by the low ordering temperature (TC ≤ 3 K) and a positive but small Curie-Weiss temperature (θp = 3 K). Under an external magnetic field, the magnetization process yields a large magnetic entropy change of 38.5 J kg−1 K−1 at 5 K for 0-7 T and 23.6 J kg−1 K−1 at 3 K for 0-3 T. Finally, our first-principles calculations demonstrate a ferrimagnetic spin model with the Gd(↑)-Gd(↑)-Fe(↓)-Fe(↓) configuration. The weak magnetic interaction is an average effect of ferromagnetic (4f-4f and 3d-3d) and antiferromagnetic (4f-3d) interactions. The antiferromagnetic 4f-3d interaction is a reason for the reduction of MCE.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.5054675
    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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  • 10
    Online Resource
    Online Resource
    High performance hydrogen/oxygen terminated CVD single crystal diamond radiation detector
    AIP Publishing ; 2020
    In:  Applied Physics Letters Vol. 116, No. 9 ( 2020-03-02)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 116, No. 9 ( 2020-03-02)
    Abstract: We report the performance of a single crystal diamond radiation detector with gold films on hydrogen-terminated diamond as electrical contacts and oxygen-terminated diamond as surface isolation between electrodes. The origin-symmetric current-voltage characteristics showed excellent Ohmic contact behavior. An extremely low dark current value of 7.46 × 10−13 A/mm2 was measured at an electric field of 1 V/μm. The charge collection efficiency and energy resolution of this detector were 99.01% and 1.5% for holes, and 98.6% and 1.7% for electrons under irradiation with 241Am α-particles. Under 60Co γ-ray irradiation with a dose rate of 1.271 Gy/s, the gain factor, specific sensitivities, and signal-to-noise ratio were 49.46, 12.43 μC/Gy·mm3, and 1 × 106 at 200 V bias voltage (0.66 V/μm), respectively. A rise time of 347.4 ps of the response to a pico-second pulsed electron source was also measured. This research provides a possibility to improve the performance of the diamond radiation detector through diamond surface modification.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.5135105
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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