DOI: 10.1063/1.2828141. Anomalous phase transition and ionic conductivity of AgI nanowire grown using porous alumina template

Anomalous phase transition and ionic conductivity of AgI nanowire grown using porous alumina template

10.1063/1.2828141

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

Silver-iodide (AgI)-based superionic conductors are attracting widespread interest for their potential applications in electrochemical devices such as sensors and batteries. A new kind of nanocomposite with highly ordered AgI nanowires embedded in an anodic-aluminum-oxide (AAO) membrane was fabricated by low-temperature step-electrochemical growth. Structural evolution, phase transition, and ionic conductivity were investigated by x-ray diffraction, differential scanning calorimetry, and impedance measurements. The phase transition from β∕γ-AgI phase to α-AgI phase occurred at temperature of 168°C, that is, higher than that of reported bulk AgI (147°C); abnormally, the α to β∕γ phase-transition temperature on cooling was also depressed as large hysteresis formed. The high-temperature phase, namely, α-AgI, remained at temperatures as low as 80°C. The initial highly oriented-growth AgI nanowire disappeared after undergoing heating and cooling processes and a mixture of polycrystalline β∕γ-AgI and amorphouslike interface phases formed. The cooled AgI-AAO composite displayed ionic conductivity in the order of 10−2Scm−1 at room temperature. This array-structured nanocomposite of AgI-AAO may be further developed for usage as a new type of battery, i.e., “nanobatteries” and “nanosensors” with individual AgI nanowires as basic elements.

Bibliography

Liang, C., Terabe, K., Hasegawa, T., Aono, M., & Iyi, N. (2007). Anomalous phase transition and ionic conductivity of AgI nanowire grown using porous alumina template. Journal of Applied Physics, 102(12).

Authors 5

Changhao Liang (first)
Kazuya Terabe (additional)
Tsuyoshi Hasegawa (additional)
Masakazu Aono (additional)
Nobuo Iyi (additional)

References 33 Referenced 25

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Dates

Type	When
Created	17 years, 8 months ago (Dec. 27, 2007, 7:29 p.m.)
Deposited	2 years, 1 month ago (Aug. 4, 2023, 11:03 p.m.)
Indexed	1 month, 1 week ago (July 30, 2025, 6:50 a.m.)
Issued	17 years, 8 months ago (Dec. 15, 2007)
Published	17 years, 8 months ago (Dec. 15, 2007)
Published Online	17 years, 8 months ago (Dec. 27, 2007)
Published Print	17 years, 8 months ago (Dec. 15, 2007)

Funders 0

None

BibTeX

@article{Liang_2007, title={Anomalous phase transition and ionic conductivity of AgI nanowire grown using porous alumina template}, volume={102}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.2828141}, DOI={10.1063/1.2828141}, number={12}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Liang, Changhao and Terabe, Kazuya and Hasegawa, Tsuyoshi and Aono, Masakazu and Iyi, Nobuo}, year={2007}, month=dec }

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