Work function tunning of directly grown multi-layer graphene on silicon by PECVD and fabrication of Ag/ITO/Gr/n-Si/Ag solar cell

Diamond and Related Materials, Journal Year: 2025, Volume and Issue: unknown, P. 112271 - 112271

Published: April 1, 2025

Language: Английский

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Study of graphene incorporation into ZnO-PVA nanocomposites modified electrode for sensitive detection of cadmium

Heliyon, Journal Year: 2024, Volume and Issue: 10(11), P. e31565 - e31565

Published: May 18, 2024

The presence of heavy metals often causes significant health risks, particularly cadmium, which is known for its high toxicity. In this study, a glassy carbon electrode was successfully modified by incorporating ZnO-PVA-Graphene nanocomposite, leveraging the excellent electrical properties and electron mobility material. Comprehensive material analysis, including XRD, confirmed that ZnO maintained hexagonal wurtzite crystal structure despite addition graphene. Moreover, FESEM analysis showed increasing graphene concentration led to reduction in particle size 85, 68, 52 nm, respectively, accompanied decrease band gap energy, as verified UV-Vis measurements. Photoluminescence tests were also conducted result noticeable blue shift nanocomposites compared ZnO-PVA, specifically near band-edge (NBE) UV emission within 374-379 nm wavelength range. Through I-V characterization, optimal cadmium detection identified 1.5 wt% nanocomposites, showing an approximate ohmic response. Meanwhile, square-wave voltammetry concentrations ranging from 0 80 ppm produced coefficient determination 0.98926 Limit Detection (LOD) 9.88 ppm. These results potential promising further development effective modifier, enhancing sensitivity systems.

Language: Английский

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Investigating the potential of powder metallurgy for fabricating graphene nanoplatelets reinforced copper nanocomposites

Journal of Materials Research and Technology, Journal Year: 2024, Volume and Issue: 31, P. 1258 - 1269

Published: June 18, 2024

Copper (Cu) is highly sought for its excellent electrical and thermal conductivity. However, limited mechanical strength hinders wider application in demanding fields. This work explores the potential of graphene nanoplatelets (GNPs) as a strengthening agent Cu. Cu-GNP composites with varying GNP content (0.1-1.5 wt%) were fabricated using combined ball milling powder metallurgy approach. The microstructure properties comprehensively analyzed field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), diffraction (XRD), Raman spectroscopy. Compared to pure Cu, showcased significantly improved performance. Notably, Cu-1.0 wt% composite exhibited remarkable ∼27% ∼53% enhancement compressive micro-hardness, respectively. improvement attributed effective load transfer between Cu well-dispersed GNPs, which act reinforcement elements inhibit dislocation movement. These findings demonstrate promising applications requiring high strength.

Language: Английский

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Twenty Years of Graphene: From Pristine to Chemically Engineered Nano-Sized Flakes

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(47), P. 32222 - 32234

Published: Nov. 13, 2024

It is a celebratory moment for graphene! This year marks the 20th anniversary of discovery this amazing material by Geim and Novoselov. Curiously, it coincides with century mark graphite's layered structure discovery. Since graphene promise that its outstanding properties would change world, society often wonders where graphene? In context, their discoverers said in 2005, "despite reigning optimism about graphene-based electronics, "graphenium" microprocessors are unlikely to appear next 20 years". Today, possibilities endless! can be used photonics, fuel cells, energy storage, artificial intelligence, biomedicine, even cultural heritage or sports. Additionally, electronic have been modified fascinating ways. Bilayer sheets found superconductive when twisted at "magic angle", leading new exciting field research known as "moiré quantum materials" "twistronics". small fragments nanometer sizes undergo confinement effect electrons, affording semiconductive materials applications optoelectronics. Organic synthesis allows preparation molecules graphene-like pattern total control shape size, exhibiting big catalog chiroptical optoelectronic properties. Perspective shows some milestones raised from chemical point view, including functionalization strategies employed chemically modify topology pristine well rising molecular graphenes.

Language: Английский

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Synergistic enhancement of electrochemical performance in Co3O4/CuO/rGO heterostructures composite for high-energy, high-rate supercapattery devices

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 97, P. 1212 - 1226

Published: Dec. 5, 2024

Language: Английский

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