Effect of TiO2 nanoparticles on electrical properties of chemical vapor deposition grown single layer graphene

Singh, Anand Kumar; Chaudhary, Vidhi; Singh, Arun Kumar; Sinha, S. R. P.

doi:10.1016/j.synthmet.2019.116155

“… 4 , 5 The excellent transparency and flexibility of graphene material is highly suitable for transparent conducting electrodes (TCEs) used in various electronics and optoelectronics devices such as display systems, sensors, spin devices, photovoltaic cells, and storage systems. 6 − 10 Recently, various synthesis approaches have been investigated for the preparation of monolayer graphene (MLG). 11 Among all, growth of high-quality and large-area graphene films on metal substrate by chemical vapor deposition (CVD) is a cost-effective and efficient method.…”

Section: Introductionmentioning

confidence: 99%

Fermi-Level Modulation of Chemical Vapor Deposition-Grown Monolayer Graphene via Nanoparticles to Macromolecular Dopants

Singh

¹

,

Singh

²

,

Sinha

³

2021

Self Cite

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It is critical to modulate the Fermi level of graphene for the development of high-performance electronic and optoelectronic devices. Here, we have demonstrated the modulation of the Fermi level of chemical vapor deposition (CVD)-grown monolayer graphene (MLG) via doping with nanoparticles to macromolecules such as titanium dioxide nanoparticles (TiO 2 NPs), nitric acid (HNO 3 ), octadecyltrimethoxysilane (OTS) self-assembled monolayer (SAM), and poly(3,4-ethylene-dioxythiophene):polystyrene sulfonate (PEDOT:PSS). The electronic properties of pristine and doped graphene samples were investigated by Raman spectroscopy and electrical transport measurements. The right shifting of G and 2D peaks and reduction in 2D to G peak intensity ratio ( I 2D / I G ) assured that the dopants induced a p-type doping effect. Upon doping, the shifting of the Dirac point towards positive voltage validates the increment of the hole concentration in graphene and thus downward shift of the Fermi level. More importantly, the combination of HNO 3 /TiO 2 NP doping on graphene yields a substantially larger change in the Fermi level of MLG. Our study may be useful for the development of graphene-based high-performance flexible electronic devices.

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“…TiO 2 nanoparticle is one of the most proper and popular semiconductors whose applications cover diverse industrial areas including photocatalysis [1,2], thin-lm, sunscreen, photovoltaic, electrodes [3,4], sensors [5,6], and drug delivery [7,8]. In this regard, TiO 2 nanoparticle have been prepared through different methods, including sol-gel [9], inverse micelle [10,11], hydrothermal [12], straight oxidation [13][14][15], chemical vapor deposition [16][17][18], physical vapor deposition [19][20][21], electrochemical accumulation [22][23][24], sonochemical [25], microwave [26][27][28], and organometallic complex compounds [29][30][31][32][33][34]. However, almost all of the mentioned methods require high temperature (usually more than 500) [35].…”

Section: Introductionmentioning

confidence: 99%

Investigation an environmentally friendly method under magnetic field as a green solvent for the synthesis of brookite phase nanoparticles at room temperature

Absalan

¹

,

Gholizadeh

²

,

Kopylov³

et al. 2021

Preprint

0

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TiO2 nanoparticles in the brookite phase were synthesized within an environmentally friendly method by magnetized water obtained by the US-patent magnetizing device (US10507450B2), which changes the properties of all types of the solvents with no limitation (protic or aprotic). Furthermore, this study is the first report on the synthesis of brookite TiO2 nanoparticle through magnetized water at room temperature. The procedure was tested by five different water; ordinary, 15, 30, 45, and 60min-magnetized water. The products were analyzed by various techniques including XRD, FESEM, ICP, BJH-plot, t-plot, Langmuir plot, BET, TEM, and FTIR. The result showed that the products obtained from 30 min-magnetized water were the most properly indexed TiO2 brookite phase with high surface activity. This sample could be a suitable green photocatalyst.

show abstract

“…TiO 2 nanoparticle is one of the most proper and popular semiconductors whose applications cover diverse industrial areas including photocatalysis [1,2], thin-lm, sunscreen, photovoltaic, electrodes [3,4], sensors [5,6], and drug delivery [7,8]. In this regard, TiO 2 nanoparticle have been prepared through different methods, including sol-gel [9], inverse micelle [10,11], hydrothermal [12], straight oxidation [13][14][15], chemical vapor deposition [16][17][18], physical vapor deposition [19][20][21], electrochemical accumulation [22][23][24], sonochemical [25], microwave [26][27][28], and organometallic complex compounds [29][30][31][32][33][34]. However, almost all of the mentioned methods require high temperature (usually more than 500) [35].…”

Section: Introductionmentioning

confidence: 99%

Investigation an environmentally friendly method under magnetic field as a green solvent for the synthesis of brookite phase nanoparticles at room temperature

Absalan

¹

,

Gholizadeh

²

,

Kopylov

³

et al. 2021

J Mater Sci: Mater Electron

0

View full text Add to dashboard Cite

TiO 2 nanoparticles in the brookite phase were synthesized within an environmentally friendly method by magnetized water obtained by the US-patent magnetizing device (US10507450B2), which changes the properties of all types of the solvents with no limitation (protic or aprotic). Furthermore, this study is the rst report on the synthesis of brookite TiO 2 nanoparticle through magnetized water at room temperature.The procedure was tested by ve different water; ordinary, 15, 30, 45, and 60min-magnetized water. The products were analyzed by various techniques including XRD, FESEM, ICP, BJH-plot, t-plot, Langmuir plot, BET, TEM, and FTIR. The result showed that the products obtained from 30 min-magnetized water were the most properly indexed TiO 2 brookite phase with high surface activity. This sample could be a suitable green photocatalyst.

show abstract

Effect of TiO2 nanoparticles on electrical properties of chemical vapor deposition grown single layer graphene

Cited by 18 publications

References 42 publications

Fermi-Level Modulation of Chemical Vapor Deposition-Grown Monolayer Graphene via Nanoparticles to Macromolecular Dopants

Fermi-Level Modulation of Chemical Vapor Deposition-Grown Monolayer Graphene via Nanoparticles to Macromolecular Dopants

Investigation an environmentally friendly method under magnetic field as a green solvent for the synthesis of brookite phase nanoparticles at room temperature

Investigation an environmentally friendly method under magnetic field as a green solvent for the synthesis of brookite phase nanoparticles at room temperature

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