Tunable Memristic Characteristics Based on Graphene Oxide Charge-Trap Memory

Li, Lei

doi:10.3390/mi10020151

Cited by 30 publications

(11 citation statements)

References 24 publications

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“…A band with a maximum at 450 nm corresponds to PMMA [ 30 ], while the band with a maximum at 500 nm corresponds to styrylquinoline [ 31 ]. For COP2, we observe a typical PMMA photoluminescence spectrum, which was presented in the work of Li [ 32 ], with the weak shoulder at 490 nm corresponding to styrylquinoline. The PL spectrum of the COP3 copolymer is characterized by a band in the 400–600 nm range, where the first band at 450 nm comes from PMMA and the second one at 494 nm is from styrylquinoline.…”

Section: Resultsmentioning

confidence: 62%

Spectroscopic Studies of Styrylquinoline Copolymers with Different Substituents

et al. 2022

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The aim of the study was to present the influence of various styrylquinoline (StQ) substituents on the luminescence, structural, and optical properties of StQ-containing copolymers. StQ-containing copolymers were synthesized by free-radical thermoinitiated polymerization. The calculations of the copolymerization ratios for the obtained copolymers were based on the basis of the integrated peak areas of the 1H NMR spectra in CDCl3. The luminescence measurements show that the change in the nature of the electron-donating and electron-withdrawing of the substituent shifts the emission band to longer wavelengths and causes a transition from blue fluorescence to green or yellow and orange (or even white), regardless of the electronic nature of the introduced substituent group. The structural properties were measured by Fourier-Transform Infrared (FTIR) and Raman spectroscopies. For all of the compounds, we observed similarities in the bands in FTIR and Raman measurements. The optical parameters were obtained from the absorbance measurements. Additionally, Scanning Electron Microscopy (SEM) was used to study the surface topography of the thin layers on the glass substrate. The SEM images confirm that we obtained smoother layers for two copolymers. The computational Density Functional Theory (DFT) analysis fully supports the beneficial features of the analyzed systems for their applications in optoelectronic devices. Based on the obtained results, it can be concluded that all of the studied styrylquinolines are promising materials for applications in organic light-emitting diodes (OLEDs). However, COP1 with an OCH3 donor substituent possess a wider luminescence band, and its layer is smoother and more transparent.

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Section: Resultsmentioning

confidence: 62%

Spectroscopic Studies of Styrylquinoline Copolymers with Different Substituents

et al. 2022

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“…The spectrum contained sub peaks at (342, 377, 399, 421) nm, 462 nm and 572 nm which associated with violets, blue and yellow colors, respectively. Lei et al captured a fluorescence emission spectrum for PMMA solution centered at 380 nm after exciting with excited 320 nm [43]. The PMMA fibers showed a broad emission band under 349 nm excitation, with a peak at 522 nm, which was attributed to the 𝜋 → 𝜋 * transition of PMMA carbonyl groups [44].…”

Section: 3fluorescence Analysismentioning

confidence: 99%

Structural, optical, and dielectric properties of PMMA/PEO blend loaded with TiO 2 /V/TBAI

El‐Naggar

Kamal

Mohamed

2023

Preprint

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Blended polymer films based on poly (methyl methacrylate) (PMMA), and poly ethylene oxide (PEO), vanadium doped nano titanium dioxide (TiO2/V) and different amount of tetrabutylammonium iodide (TBAI) were formed by the sol gel and solution casting methods. Rietveld refinement for synchrotron x-ray diffraction was used to investigate structure and microstructure of TiO2/V sample. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies revealed the incorporation of the fillers in the prepared blends. The degree of roughness of different films were explored using SEM technique. The effect of TiO2/V and TBAI doping on linear/nonlinear optical parameters, dielectric constant, electric modulus, energy stored and ac conductivity of PMMA/PEO blend was studied using diffused reflectance and LCR meter techniques. The blended polymer's direct and indirect band gaps (5.03, 4.96) eV shrank to (4.99, 4.64) eV as it loaded with TiO2/V and reduced further (4.33, 4.02) eV as it loaded with TBAI. At 500 nm, the refractive (n) value of undoped blend is 1.76 and blend with TiO2/V and 2.5 wt % TBAI has the highest n value (2.16) while blend with TiO2/V and 10 wt % TBAI has the lowest n value (2.06). The influence of doping on the emitted colors from each blend was explored using fluorescence technique and CIE diagram. The controllable optical and electrical features reveal that the PMMA/PEO with TiO2/V and TBAI blends could be potential optical materials in the advances of futuristic flexible-type optoelectronic devices.

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“…In the case of the existence of metal–insulator–metal layers or semiconductor–insulator–metal layers on the substrate, there are specific unique hysteresis properties at some voltage range with two apparently different resistance values (extremely high resistance value and extremely low resistance value) following theories such as ohmic conduction, thermionic emission, Schottky emission, or tunneling current [47]. Various research groups have developed organic material-based resistive memory devices [48,49]. Biomolecules are suitable for demonstrating resistive switching functionality at the nanometer scale because they possess unique properties at such scale.…”

Section: Biomemorymentioning

confidence: 99%

Development of Bioelectronic Devices Using Bionanohybrid Materials for Biocomputation System

2019

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Bioelectronic devices have been researched widely because of their potential applications, such as information storage devices, biosensors, diagnosis systems, organism-mimicking processing system cell chips, and neural-mimicking systems. Introducing biomolecules including proteins, DNA, and RNA on silicon-based substrates has shown the powerful potential for granting various functional properties to chips, including specific functional electronic properties. Until now, to extend and improve their properties and performance, organic and inorganic materials such as graphene and gold nanoparticles have been combined with biomolecules. In particular, bionanohybrid materials that are composed of biomolecules and other materials have been researched because they can perform core roles of information storage and signal processing in bioelectronic devices using the unique properties derived from biomolecules. This review discusses bioelectronic devices related to computation systems such as biomemory, biologic gates, and bioprocessors based on bionanohybrid materials with a selective overview of recent research. This review contains a new direction for the development of bioelectronic devices to develop biocomputation systems using biomolecules in the future.

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Tunable Memristic Characteristics Based on Graphene Oxide Charge-Trap Memory

Cited by 30 publications

References 24 publications

Spectroscopic Studies of Styrylquinoline Copolymers with Different Substituents

Spectroscopic Studies of Styrylquinoline Copolymers with Different Substituents

Structural, optical, and dielectric properties of PMMA/PEO blend loaded with TiO 2 /V/TBAI

Development of Bioelectronic Devices Using Bionanohybrid Materials for Biocomputation System

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