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Hydrothermally Grown TiO<sub>2 </sub>Nanorod Array Memristors with Volatile States

Hydrothermally Grown TiO2 Nanorod Array Memristors with Volatile States

Type of Publication: Journal article
Publication status: Published
Author: Ebenhoch, Carola; Kalb, Julian; Lim, Joohyun; Seewald, Tobias; Scheu, Christina; Schmidt-Mende, Lukas
Year of publication: 2020
Published in: ACS applied materials & interfaces ; 12 (2020), 20. - pp. 23363-23369. - American Chemical Society. - ISSN 1944-8244. - eISSN 1944-8252
Pubmed ID: 32321245
DOI (citable link): https://dx.doi.org/10.1021/acsami.0c05164
Summary:
In the present study, the memristive characteristics of hydrothermally grown TiO2 nanorod arrays, particularly, the difference in the retention-time of the resistance state are investigated in dependence of the array growth temperature. A volatile behavior is observed and related to a redistribution of oxygen vacancies over time. It is shown, that the retention time increases for increasing array growth temperatures from several seconds up to 20 minutes. The relaxation behavior is also seen in the current-voltage characteristics, which do not show the common unipolar, bipolar, or complementary switching behavior. Instead, the temporal evolution depends on the duration of the applied voltage and on the nanowire growth temperature. Therefore, electronic measurements are combined with scanning electron and scanning transmission electron microscopy, so that the amount of oxygen defect-rich grain boundaries in the upper part of the nanowires can be linked to the differences in the current-voltage behavior and retention time.
Subject (DDC): 530 Physics
Keywords: memristor, TiO2 nanorod array, resistive switching, long-term state, oxygen diffusion, current decay, retention time
Bibliography of Konstanz: Yes
Refereed: Yes

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EBENHOCH, Carola, Julian KALB, Joohyun LIM, Tobias SEEWALD, Christina SCHEU, Lukas SCHMIDT-MENDE, 2020. Hydrothermally Grown TiO2 Nanorod Array Memristors with Volatile States. In: ACS applied materials & interfaces. American Chemical Society. 12(20), pp. 23363-23369. ISSN 1944-8244. eISSN 1944-8252. Available under: doi: 10.1021/acsami.0c05164

@article{Ebenhoch2020-05-20Hydro-49410, title={Hydrothermally Grown TiO2 Nanorod Array Memristors with Volatile States}, year={2020}, doi={10.1021/acsami.0c05164}, number={20}, volume={12}, issn={1944-8244}, journal={ACS applied materials & interfaces}, pages={23363--23369}, author={Ebenhoch, Carola and Kalb, Julian and Lim, Joohyun and Seewald, Tobias and Scheu, Christina and Schmidt-Mende, Lukas} }

In the present study, the memristive characteristics of hydrothermally grown TiO<sub>2</sub> nanorod arrays, particularly, the difference in the retention-time of the resistance state are investigated in dependence of the array growth temperature. A volatile behavior is observed and related to a redistribution of oxygen vacancies over time. It is shown, that the retention time increases for increasing array growth temperatures from several seconds up to 20 minutes. The relaxation behavior is also seen in the current-voltage characteristics, which do not show the common unipolar, bipolar, or complementary switching behavior. Instead, the temporal evolution depends on the duration of the applied voltage and on the nanowire growth temperature. Therefore, electronic measurements are combined with scanning electron and scanning transmission electron microscopy, so that the amount of oxygen defect-rich grain boundaries in the upper part of the nanowires can be linked to the differences in the current-voltage behavior and retention time. terms-of-use Kalb, Julian Hydrothermally Grown TiO<sub>2 </sub>Nanorod Array Memristors with Volatile States 2020-05-07T07:14:38Z 2020-05-07T07:14:38Z 2020-05-20 Ebenhoch, Carola Seewald, Tobias eng Scheu, Christina Lim, Joohyun Schmidt-Mende, Lukas Seewald, Tobias Ebenhoch, Carola Schmidt-Mende, Lukas Scheu, Christina Kalb, Julian Lim, Joohyun

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