Experimental study of the thermal expansion of (AgI)0.67(Ag2MoO4)0.33ionic glass from 5 K to 300 K

Raimondo, Anna; Mandanici, Andrea; Ramos, M. A.; Rodrigo, José A.; Armellini, Cristina; Cutroni, M.; Vieira, S.

doi:10.1080/14786430802331207

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…The electrical property for the silver trimolybdate NWs has not been reported previously. To the best of our knowledge, a lot of research work has been focused on the electrical properties of silver ion conducting glasses, − AgI-doped silver molybdates glasses, − and β-AgVO 3 . , Herein, we discuss the electrical conductivity property of an individual single-crystal silver trimolybdate NW by scanning the bias voltage at room temperature and under ambient conditions. Due to the existence of Ag + cations between the molybdate layers in the structure, the as-synthesized NWs were expected to have a good electrical conductivity for potential applications in microelectrodes or nanodevices. , …”

Section: Resultsmentioning

confidence: 99%

Ultralong Silver Trimolybdate Nanowires: Synthesis, Phase Transformation, Stability, and Their Photocatalytic, Optical, and Electrical Properties

et al. 2011

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Ultralong orthorhombic silver trimolybdate nanowires (NWs) can be synthesized by a simple hydrothermal process without using any structure directing agent. Their phase transformation and stability to thermal and modeling sunlight from a Xe lamp have been systematically studied. Well-dispersed Ag nanoparticles can in situ form on the backbone of the nanowires by photoirradiation, and their photocatalytic and optical properties have been investigated. The investigations on photocatalytic, photoluminescent, and surface-enhanced Raman scattering (SERS) of the as-synthesized nanowires indicate that these nanowires loaded with Ag nanoparticles by photoirradiation can be a new kind of photocatalytic and luminescent material and potentially can be used as an efficient SERS substrate. The electrical conductivity of an individual nanowire exhibits almost nonlinear and symmetric current/voltage (I/V) characteristics for bias voltages in the range of -5 to 5 V. Ohmic mechanism, Schottky, and the Poole-Frenkel emission play an important part, respectively, in low, medium, and high electrical fields.

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Section: Resultsmentioning

confidence: 99%

Ultralong Silver Trimolybdate Nanowires: Synthesis, Phase Transformation, Stability, and Their Photocatalytic, Optical, and Electrical Properties

et al. 2011

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Thermal expansion of silver iodide-silver molybdate glasses at low temperatures

Mandanici

Raimondo

Cutroni

et al. 2009

The Journal of Chemical Physics

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Ionic glasses obtained combining silver iodide and silver molybdate are characterized by quite low values of the glass transition temperature T(g) around 320-350 K, by high values of the dc ionic conductivity even at room temperature and by a peculiar behavior of the mechanical response at ultrasonic frequencies. In fact, at temperatures well below their glass transition temperature, these glasses exhibit an intense peak of acoustic attenuation well described by two different and almost overlapping relaxational contributions. Considering also that negative thermal expansion has been reported for some molybdate crystalline compounds, we have investigated in this work the thermal expansion of two silver iodomolybdate glasses (AgI)(1-x)(Ag(2)MoO(4))(x) for x=0.25 and x=0.33 in a wide temperature range (4.2-300 K) from cryogenic temperatures up to some 20 K below T(g) using a precision capacitance dilatometer aiming to understand whether the expansivity shows some possible fingerprint corresponding to the above-mentioned mechanical response. Two different measuring methods, a quasiadiabatic and a continuous one, have been used for the thermal expansion measurements. The results are discussed in comparison with the information obtained from previous investigations based on the extended x-ray absorption fine structure (EXAFS) technique and with the behavior of other ionic glasses.

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Experimental study of the thermal expansion of (AgI)_0.67(Ag₂MoO₄)_0.33ionic glass from 5 K to 300 K

Cited by 2 publications

References 21 publications

Ultralong Silver Trimolybdate Nanowires: Synthesis, Phase Transformation, Stability, and Their Photocatalytic, Optical, and Electrical Properties

Ultralong Silver Trimolybdate Nanowires: Synthesis, Phase Transformation, Stability, and Their Photocatalytic, Optical, and Electrical Properties

Thermal expansion of silver iodide-silver molybdate glasses at low temperatures

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