Graphene oxide and TiO2 nano-particle composite based nonvolatile memory

Cao, Hong; Yuan, Fangyuan; Wu, Huaqiang; Deng, Ning; Yu, Zhong‐Zhen; Wei, Rongshan

doi:10.1109/nvmts.2015.7457487

Cited by 5 publications

(6 citation statements)

References 24 publications

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“…The CE mechanism using the charge transfer is schematically illustrated in Figure b; the excitation of the laser (532 nm) on GO/RGO leads to an increase in the transfer of the electronic charge between the analyte molecules and the GO/RGO sheet through the paths . The energy value of the valence band and conduction band for GO is −6.3 and −3.4 eV, respectively . Whereas the energy value for the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital for RhB is −5.4 and −3 eV, respectively .…”

Section: Resultsmentioning

confidence: 99%

“…41 The energy value of the valence band and conduction band for GO is −6.3 and −3.4 eV, respectively. 42 Whereas the energy value for the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital for RhB is −5.4 and −3 eV, respectively. 43 The presence of the oxygen functional groups is facilitated by an energy level just below the CB of GO, which is easier for the charge transfer from HOMO of RhB to the CB of GO through functional groups-created energy levels.…”

Section: Pl Analysis Of Rhb In Go and The Water Solutionmentioning

confidence: 99%

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Plasma-Treated Graphene Surfaces for Trace Dye Detection Using Surface-Enhanced Raman Spectroscopy

Singh

Mayanglambam

Nemade

et al. 2022

ACS Appl. Nano Mater.

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Trace detection using reliable, highly stable, cost-effective, and high-performing substrate materials remains a challenging problem. In the present report, extra-large-size graphene oxide (GO) sheets are exfoliated using a simple mild heating technique and subsequently reduced to remove the attached oxygen functional groups by thermal treatment without losing their size for the sensing application using surface-enhanced Raman spectroscopy. The microscopic structure of the GO is studied by using the optical microscope, field emission scanning electron microscope, atomic force microscope, and field emission transmission electron microscope imaging. The nature of GO and reduced GO (RGO) is confirmed from the X-ray diffraction, Raman, X-ray photoelectron spectroscopy, and Fourier transform infrared (FTIR) analyses. The structure of GO and RGO is modified using gas plasma treatment, which is evidenced from the Raman analysis showing a shift in peak positions, change in full width at half maximum of peaks, D′–G, and I D/I G, and substantiated by FTIR analysis. The surface-enhanced Raman spectroscopy (SERS) effect of the dye Rhodamine B (RhB) on GO/RGO is selectively more enhanced as compared to the methyl orange (MO), methyl blue (MB), and rose Bengal dyes. We show that Ar plasma treatment of GO yields the highest enhancement factor (EF) of 1.3 × 104, which is one of the highest among the reported values. Using the large area GO, we demonstrate a detection limit of the 10–8 M RhB dye. To isolate the contributions of the functional groups and defects in the observed EF, we performed vacuum annealing of the large-area GO and elucidated the role of defects in the high EF observed in the Ar plasma-treated GO. Hence, the large-area GO with an appropriate plasma treatment could be a potential avenue for use as a SERS substrate for application in trace detections.

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Section: Resultsmentioning

confidence: 99%

Section: Pl Analysis Of Rhb In Go and The Water Solutionmentioning

confidence: 99%

Plasma-Treated Graphene Surfaces for Trace Dye Detection Using Surface-Enhanced Raman Spectroscopy

Singh

Mayanglambam

Nemade

et al. 2022

ACS Appl. Nano Mater.

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“…The reported device shows low switching voltage (about ±1 V), tight distributions of HRS and LRS, long retention of more than 10 4 s, and steady endurance performances, which is superior to the GO device. The mechanism of conduction and resistance switching was also studied . Li et al have demonstrated the RS properties of the TiO 2 –CuO composite film.…”

Section: Memristor/memristive Devicementioning

confidence: 99%

“…The mechanism of conduction and resistance switching was also studied. 62 Li et al have demonstrated the RS properties of the TiO 2 −CuO composite film. In this work, they have studied the effect of fatigue fracture on the RS properties of the TiO 2 − CuO film/ITO flexible memristor device.…”

Section: Memristor/memristive Devicementioning

confidence: 99%

Promising Materials and Synthesis Methods for Resistive Switching Memory Devices: A Status Review

Kamble

Patil

Kamat

et al. 2023

ACS Appl. Electron. Mater.

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In recent years, the emergence of memory devices, especially resistive random-access memories (RRAM), has been a front-runner in many technological applications. This is due to its high-speed operation, structural simplicity, low power consumption, scalability potential, and high-density memory storage features. To develop an efficient and miniaturized memory device based on the resistive switching effect, it is necessary to study the range of materials and their fabrication techniques. In this review article, we have summarized the diverse organic and inorganic materials and their resistive switching performance. Furthermore, we reviewed some potential materials for next-generation resistive switching devices. In the resistive switching device fabrication front, numerous physical, chemical, and biological-based synthesis techniques were briefly reviewed. The influence of preparative parameters was also discussed. Finally, the current status and future directions of this field are discussed. The present review article provides important details of the resistive switching effect, promising organic and inorganic materials, and various fabrication techniques to improve the device's performance for memory applications.

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“…Up to now, GO/TiO 2 nanoparticle RRAM devices have shown low switching voltage (about ±1 V) [9] and good endurance up to 10 5 cycles and long retention time more than 5 × 10 3 s [10]. Also, excellent large flexibility area without degradation of memory performance for ∼100 cycles has also been reported for GO-based device [11].…”

Section: Introductionmentioning

confidence: 97%

Facile and Novel in-Plane Structured Graphene/TiO₂ Nanocomposites for Memory Applications

Shehata

Maksoud

Balboul

2018

Advances in Condensed Matter Physics

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Here, we report a simple strategy for the preparation of graphene/TiO 2 nanocomposite by UV-assisted incorporation of TiO 2 nanosol in graphene oxide (GO) dispersion. The proposed method is facile and of low cost without using any photocatalysts or reducing agents; this can open up a new possibility for green preparation of stable graphene dispersions in large-scale production. X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy, and transmission electron microscopy (TEM) have been used to characterize carefully the as-prepared composites and to confirm the successful preparation of the nanocomposites. The average crystallite size of TiO 2 nanoparticles calculated from XRD pattern using Rietveld analysis is ∼35 nm. TEM measurements show the adsorption of TiO 2 onto graphene (G) sheets, which prevents the restacking of graphene sheets. Current-voltage and capacitance-voltage measurements were used to investigate the electrical resistive memory properties of GO, GO/TiO 2 , and G/TiO 2 thin films. Observed results show hysteresis behavior due to the charge trapping and detrapping process, indicating that the prepared thin films exhibit an excellent resistance switching memory characteristic for G/TiO 2 device.

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Graphene oxide and TiO2 nano-particle composite based nonvolatile memory

Cited by 5 publications

References 24 publications

Plasma-Treated Graphene Surfaces for Trace Dye Detection Using Surface-Enhanced Raman Spectroscopy

Plasma-Treated Graphene Surfaces for Trace Dye Detection Using Surface-Enhanced Raman Spectroscopy

Promising Materials and Synthesis Methods for Resistive Switching Memory Devices: A Status Review

Facile and Novel in-Plane Structured Graphene/TiO₂ Nanocomposites for Memory Applications

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Graphene oxide and TiO2 nano-particle composite based nonvolatile memory

Cited by 5 publications

References 24 publications

Plasma-Treated Graphene Surfaces for Trace Dye Detection Using Surface-Enhanced Raman Spectroscopy

Plasma-Treated Graphene Surfaces for Trace Dye Detection Using Surface-Enhanced Raman Spectroscopy

Promising Materials and Synthesis Methods for Resistive Switching Memory Devices: A Status Review

Facile and Novel in-Plane Structured Graphene/TiO2 Nanocomposites for Memory Applications

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Product

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Facile and Novel in-Plane Structured Graphene/TiO₂ Nanocomposites for Memory Applications