The formation of Cu2O nanoparticles in polyimide using Cu electrodes via chemical curing, and their application in flexible polymer memory devices

Choi, Dong Joo; Kim, Jeong-Ki; Seong, Haseob; Jang, Min-Kyung; Kim, Young‐Ho

doi:10.1016/j.orgel.2015.09.007

Cited by 8 publications

(1 citation statement)

References 58 publications

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“…In this approach, sunlight is absorbed by the semiconductor in electrolysis, thereby providing energy to drive the water-splitting reaction [2]. In the photoelectrochemical water-splitting process, the semiconductor electrode must have a minimum bandgap of 1.5-2.5 eV [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ascorbic Acid Concentration on Cu2O Production for Photoelectrochemical Water Splitting on Photocathode Thin Films

2022

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Hydrogen energy has great potential as a renewable energy source. Electrochemical water-splitting can be employed to obtain hydrogen by converting solar energy into hydrogen. In this study, Cu2O thin film electrodes have been successfully synthesized using ascorbic acid using the spin coating method. This study aimed to determine the effect of ascorbic acid in manufacturing Cu2O semiconductors as photocathodes and their activity for electrochemical water-splitting. The results indicated that ascorbate affected the photon current and onset potential of the Cu2O semiconductor. The synthesis results found that Cu2O at C1 (lower concentration than Cu2+) yielded 95.69%, and the yield for Cu2O at C2 (concentration equal to Cu2+) was 96.2%. The yield for Cu2O at C3 (concentration greater than Cu2+) was 99.82%. The photon currents generated by adding 3%, 6%, and 9% ascorbate solution were 1.18, 1.69, and 1.78 mA/cm2, respectively, at 0.3 V vs. RHE (Reversible Hydrogen Electrode). X-ray diffraction analysis revealed that the sample consisted of Cu2O C3 with an average grain size of 17.55 nm. Meanwhile, Cu2O C1 and Cu2O C2 had average grain sizes of 38.99 nm and 36.42 nm, respectively. SEM analysis showed the presence of Cu2O with a cuboid and flower-like morphology. EDX analysis showed that the samples contained elements of Cu: O, 73.97%: 26.03%; 79.89%: 20.11% and 98.43%: 1.57% respectively.

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Section: Introductionmentioning

confidence: 99%

Effect of Ascorbic Acid Concentration on Cu2O Production for Photoelectrochemical Water Splitting on Photocathode Thin Films

2022

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Band gap varied cuprous oxide (Cu2O) thin films as a tool for glucose sensing

Pagare

Torane

2016

Microchim Acta

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Size-controlled synthesis of Cu2O nanoparticles via reaction-diffusion

Badr

Epstein

2017

Chemical Physics Letters

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Copper (I) oxide nanoparticles are synthesized by a simple reaction-diffusion process involving Cu + ions and sodium hydroxide in gelatin. The mean diameter and the size dispersion of the nanoparticles can be controlled by two experimental parameters, the percent of gelatin in the medium and the hydroxide ion concentration. UV-visible spectroscopy, transmission electron microscopy and X-ray diffraction are used to analyze the size, morphology, and chemical composition of the nanoparticles generated. IntroductionThe use of nanoparticles of characteristic size and narrow dispersion to form hybrid materials is gaining increasing interest in the biomedical 1,2 and electronics 3 industries. Among various metal oxide particles, copper (I) oxide has received much attention because of its distinctive characteristics and its low cost compared to silver and gold oxide nanoparticles. In particular, its electrical properties due to its low energy band gap (2.18 eV), enhanced nonlinear optical properties, photocatalytic and catalytic power 4 , and antibacterial activity 5 make it an attractive material for many applications. Methods developed for the preparation of copper (I) oxide nanoparticles utilize ultrasound 6 , chemical curing 7 , gas-phase reduction 8 and other techniques that involve the reduction of copper (II) oxide to copper (I) oxide 9,10 . In the methods proposed to date, the extent of the reduction is not easy to control; thus the nanoparticles produced may not be very pure. Careful selection of surfactants or organic additives to protect the particles from aggregation is also required. The approach we propose here is unique in the sense that it uses mild reagents and ambient experimental conditions. The problems of reduction and aggregation are circumvented by the preparation method, where the initial reaction takes place between monovalent Cu + ions and hydroxide ions in a gel medium to produce the Cu 2 O nanoparticles. In addition, our approach allows the design and synthesis of nanoparticles with particular size characteristics simply by varying the gel composition and the concentration of sodium hydroxide. The diffusion-controlled reaction technique employed in our method has been widely used to prepare Liesegang patterns 11,12 . The Liesegang phenomenon is the dynamic formation of self-organized rhythmic precipitate patterns. The proposed scenarios for the explanation of the Liesegang phenomenon can be classified as either prenucleation or postnucleation, depending on the sequence of elementary steps 13,14 . The prenucleation models are descendants of Ostwald's supersaturation theory and assume that the formation of bands is the result of a supersaturation wave. Postnucleation models assume that before bands form, the precipitate forms a homogeneous solution of solid particles, which loses its stability and arranges into periodic bands. Walliser et al. 15 employed a diffusion-controlled reaction technique to grow various size silver dichromate nanoparticles and microparticles in one step. In their study, ...

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The formation of Cu2O nanoparticles in polyimide using Cu electrodes via chemical curing, and their application in flexible polymer memory devices

Cited by 8 publications

References 58 publications

Effect of Ascorbic Acid Concentration on Cu2O Production for Photoelectrochemical Water Splitting on Photocathode Thin Films

Effect of Ascorbic Acid Concentration on Cu2O Production for Photoelectrochemical Water Splitting on Photocathode Thin Films

Band gap varied cuprous oxide (Cu2O) thin films as a tool for glucose sensing

Size-controlled synthesis of Cu2O nanoparticles via reaction-diffusion

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