Abstract
This paper reports the first successful fabrication of an ITO/silkworm hemolymph/Al bio-memristor using silkworm hemolymph as the active layer. Experiments demonstrate that the silkworm hemolymph bio-memristor is a nonvolatile rewritable bipolar memory device with a current switching ratio exceeding 103. The state of the bio-memristor can be retained for more than 104 seconds and remains stable for at least 500 cycles. Tests of 1/f noise have shown that the resistance switching characteristics of the silkworm hemolymph bio-memristor are related to the formation and breaking of conductive filaments, which result from the migration of oxygen ions and the oxidation and reduction of metal cations in the silkworm hemolymph film. The naturally non-toxic silkworm hemolymph offers advantages for human health, environmental protection, and biocompatibility. The proposed nonvolatile rewritable bio-memristor based on silkworm hemolymph possesses great application potential.
Highlights
Because memristors have extensive and important application prospects in many areas, including information storage, logical calculation, and artificial neural networks, they have recently become a research hotspot in many fields, such as materials, physics, electronics and biology[1,2,3]
Biological memristors fabricated from natural non-toxic biological materials have advantages related to human health, environmental protection, biocompatibility, and convenience of manufacturing and are low cost
Experiments revealed that the silkworm hemolymph bio-memristor is a nonvolatile rewritable flash memory device with a current switching ratio exceeding 103
Summary
Because memristors have extensive and important application prospects in many areas, including information storage, logical calculation, and artificial neural networks, they have recently become a research hotspot in many fields, such as materials, physics, electronics and biology[1,2,3]. Biological memristors fabricated from natural non-toxic biological materials have advantages related to human health, environmental protection, biocompatibility, and convenience of manufacturing and are low cost. They have been extensively studied during the past few years. A current switching ratio of 103 was reported for a bio-memristor fabricated from egg white[4]. The silk fibroin solution extracted by degumming and purifying cocoons has been used to fabricate memristors with relatively low ON/OFF current ratios of approximately 10 at 4 V17. The experimental results show that the silkworm hemolymph bio-memristor has a bistable resistance switching characteristic with a high ON/OFF current ratio above 103 and exhibits rewritable flash memory. The material used for the active layer of this bio-memristor is different from that used for the memristors investigated in our previous studies[21,22,23]
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