Organic memristive devices based on silver nanoparticles and DNA |
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Authors: | Yuan Wang Xunling YanRuixin Dong |
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Affiliation: | School of Physical Science and Information Engineering, Liaocheng University, Key Laboratory of Optical Communication Science and Technology of Shandong Province, China |
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Abstract: | A novel organic memory device ‘Al/silver nanoparticles-deoxyribonucleic acid-cetyltrimethylammonium Bromide/ITO’ (Al/Ag NPs–DNA–CTMA/ITO) was fabricated. The measured I–V curve of the device exhibits unipolar switching. The conductivity and the memristive characteristics are significantly improved by the introduction of Ag nanoparticles, but with a poor stability. Better stability is achieved by annealing the device, which also changes the switching characteristic from unipolar to bipolar. As the annealing temperature is raised, the switching voltage first decreases and then increases, while the current IRESET first increases and then decreases. The range of the optimal annealing temperature is from 383 K to 403 K and the maximum ON/OFF current ratio (ION/IOFF) can reach 104. The switching voltage, the current, and ION/IOFF all increase with the applied voltage amplitude, and VSET and ION/IOFF obey a quadratic and Boltzmann relationship, respectively. |
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Keywords: | DNA biopolymer Ag nanoparticles Organic memory Annealing Resistive switch |
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