Significant Effects of Electrode Metal Work Function on Resistive Memory Devices with Gelatin Biodielectric Layer

Liu, Shuting; Dong, Shurong; Jin, Hao; Huang, Shuyi; Wang, Xiaozhi; Luo, Jikui

doi:10.1149/2.0701807jes

Cited by 8 publications

(8 citation statements)

References 27 publications

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“…The electron conductivity in sensors largely depends on the presence of ions and charged particles, which are the charge carriers in the internal biosystem within gelatin. , What is of particular interest is that gelatin possesses an optimal electrical conductivity compared to most commonly available biomaterials, facilitating electron–hole transfer with decreased coordination . Furthermore, the 1D structure of gelatin allows the direction of carrier transport within the material to be restricted, as shown in Figure a.…”

Section: Resultsmentioning

confidence: 99%

Ag-Nanoparticle-Coupled UV-Responsive Gelatin Nanofiber Photodetectors

Chen

Liu

Chang

et al. 2023

ACS Appl. Nano Mater.

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In this era of environmental protection and performance, the development of organic photodetectors is booming. The hydrogel material is beginning to attract attention because of its characteristics such as plasticity and ecofriendliness. However, it is still a challenge to achieve a high-speed response in biophotodetectors. Herein, the development of an organic one-dimensional nanostructured photodetector is proposed through rotary-jet injection of gelatin fibers incorporated with silver nanoparticles (Ag NPs). The variation in the photoelectric properties of thin-film, fibrous structures with different diameters of approximately 40 μm and 400 nm has been investigated. In particular, the gelatin–Ag NPs fiber photoreceptor with a diameter of about 400 nm improved the light-to-dark current ratio by up to 28000% higher than the film structure, with rise and decay times of only 0.23 and 0.56 s. In addition, the nanostructure effectively boosts the photocurrent and suppresses the dark current because of its confining domains. The Ag NPs within the gelatin nanofibers produce localized surface plasmon resonance in the UV-illumination environment, enhancing the light absorption of the photosensitive layer, which contributes directly to the increase in the rate of excitons. The novel structure of the hybridized gelatin nanofibers incorporating silver nitrate has offered the promising potential for organic photodetectors.

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Section: Resultsmentioning

confidence: 99%

Ag-Nanoparticle-Coupled UV-Responsive Gelatin Nanofiber Photodetectors

Chen

Liu

Chang

et al. 2023

ACS Appl. Nano Mater.

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“…As reported in our previous work [26], the resistive switching behavior of metal TE/gelatin/W devices was investigated thoroughly using a conductive atomic force microscope (C-AFM) and transmission electron microscope (TEM) measurements. The resistive switching behavior was attributed to the formation and fracture of metallic conductive filaments composed of elements from the used metal electrodes, which has been directly observed.…”

Section: Resultsmentioning

confidence: 99%

Flexible and fully biodegradable resistance random access memory based on a gelatin dielectric

et al. 2020

Self Cite

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The increased public concerns on healthcare, the environment and sustainable development inspired the development of biodegradable and biocompatible electronics that could be used as degradable electronics in implants. In this work, a fully biodegradable and flexible resistance random access memory (RRAM) was developed with low-cost biomaterial gelatin as the dielectric layer and the biodegradable polymer poly(lactide-coglycolide) acid (PLGA) as the substrate. PLGA can be synthesized by a simple solution process, and the PLGA substrate can be peeled off the handling substrate for operation once the devices are fabricated. The fabricated memory devices exhibited reliable nonvolatile resistive switching characteristics with a long retention time over 10 4 s and a near-constant on/off resistance ratio of 10 2 even after 200 bending cycles, showing the promising potential for application in flexible electronics. Degradation of the devices in deionized water and in phosphate buffered saline (PBS) solution showed that the whole devices can be completely degraded in water. The dissolution time of the metals and the gelatin layer was a few days, while that for PLGA is about 6 months, and can be modified by changing the synthesis conditions of the film, thus allowing the development of biodegradable electronics with designed dissolution time.

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“…Compared with metals like Au, Ag, and Cu, local oxidation is more likely to occur on Al electrodes at the interface, which might be a decisive influence factor explaining its unique performance [120][121][122][123][124][131][132][133]. As reported by Liu et al [8], the work function difference between TE and BE metals has significant effects on device characteristics and performance. RRAM devices made from TE and BE metals with larger work function difference have a higher and more stable on/off resistance ratio with larger set and reset voltages.…”

Section: Rram Based On Graphene and Its Derivativesmentioning

confidence: 90%

Memristive Non-Volatile Memory Based on Graphene Materials

Shen

Zhao

et al. 2020

Micromachines

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Resistive random access memory (RRAM), which is considered as one of the most promising next-generation non-volatile memory (NVM) devices and a representative of memristor technologies, demonstrated great potential in acting as an artificial synapse in the industry of neuromorphic systems and artificial intelligence (AI), due its advantages such as fast operation speed, low power consumption, and high device density. Graphene and related materials (GRMs), especially graphene oxide (GO), acting as active materials for RRAM devices, are considered as a promising alternative to other materials including metal oxides and perovskite materials. Herein, an overview of GRM-based RRAM devices is provided, with discussion about the properties of GRMs, main operation mechanisms for resistive switching (RS) behavior, figure of merit (FoM) summary, and prospect extension of GRM-based RRAM devices. With excellent physical and chemical advantages like intrinsic Young’s modulus (1.0 TPa), good tensile strength (130 GPa), excellent carrier mobility (2.0 × 105 cm2∙V−1∙s−1), and high thermal (5000 Wm−1∙K−1) and superior electrical conductivity (1.0 × 106 S∙m−1), GRMs can act as electrodes and resistive switching media in RRAM devices. In addition, the GRM-based interface between electrode and dielectric can have an effect on atomic diffusion limitation in dielectric and surface effect suppression. Immense amounts of concrete research indicate that GRMs might play a significant role in promoting the large-scale commercialization possibility of RRAM devices.

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Significant Effects of Electrode Metal Work Function on Resistive Memory Devices with Gelatin Biodielectric Layer

Cited by 8 publications

References 27 publications

Ag-Nanoparticle-Coupled UV-Responsive Gelatin Nanofiber Photodetectors

Ag-Nanoparticle-Coupled UV-Responsive Gelatin Nanofiber Photodetectors

Flexible and fully biodegradable resistance random access memory based on a gelatin dielectric

Memristive Non-Volatile Memory Based on Graphene Materials

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