Fluorographene: Synthesis and sensing applications

Narayanan, Tharangattu N.; Renugopalakrishnan, V.

doi:10.1557/jmr.2017.135

Cited by 10 publications

(5 citation statements)

References 44 publications

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“…Fluorine atom is another chemical element that has been largely considered in order to tune electronic and structural properties in graphene. During the past years, the potential applications of fluorinated carbon nanomaterials have expanded covering a wide range of research subjects from bio‐sensing, due to the intriguing interface with hydrophobic nature, to energy conversion, where high energy storage capacity has been observed . The F 1 s core level spectra acquired after exposing the sample surfaces to SF 6 plasma leading to a fluorine content of about 8 at.% are reported in Figure for supported graphene on Cu foils, bare metallic substrate, and suspended graphene.…”

Section: Resultsmentioning

confidence: 99%

“…During the past years, the potential applications of fluorinated carbon nanomaterials have expanded covering a wide range of research subjects from bio-sensing, due to the intriguing interface with hydrophobic nature, to energy conversion, where high energy storage capacity has been observed. [23,24] The F 1s core level spectra acquired after exposing the sample surfaces to SF 6 plasma leading to a fluorine content of about 8 at.% are reported in Figure 3 for supported graphene on Cu foils, bare metallic substrate, and suspended graphene. As in the case of nitrogen doping, the contribution from F─Cu bond is found at the lowest binding energy (684.4 eV).…”

Section: Fluorinationmentioning

confidence: 99%

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Scanning Photoelectron Spectro‐Microscopy: A Modern Tool for the Study of Materials at the Nanoscale

Zeller

Amati

Sezen

et al. 2018

Physica Status Solidi (a)

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The advanced properties of modern materials originate from their nanoscale size and shape and from chemical modifications or doping. Special techniques that can measure the chemical state in the nanoscale are required for exploration and understanding the properties of these materials. While X‐ray photoelectron spectroscopy (XPS) can access the necessary chemical information, conventional setups have no spatial resolution. The scanning photoelectron microscope (SPEM) takes in advent the third generation synchrotron radiation facilities and uses a zone plate (ZP) focusing optics that allows spatially resolved XPS measurements in the submicron scale. Several recent examples of investigations of chemically modified or doped nanomaterials are given. The modification of suspended and supported graphene with nitrogen and fluorine is presented as well as the doping dependent position of the Fermi‐level in single GsAs nanowires and the Mott–Hubbard transition in Cr‐doped vanadium oxide. These examples show several peculiar SPEM abilities like a high surface and chemical sensitivity and a submicron spatial resolution proving the capability and importance of this technique to study materials at the nanoscale.

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Section: Resultsmentioning

confidence: 99%

Section: Fluorinationmentioning

confidence: 99%

Scanning Photoelectron Spectro‐Microscopy: A Modern Tool for the Study of Materials at the Nanoscale

Zeller

Amati

Sezen

et al. 2018

Physica Status Solidi (a)

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“…[29] Furthermore, the Raman spectroscopy analysis for FG@CM reveals the presence of two distinct peaks at ≈1329 cm −1 (D band) and ≈1603 cm −1 (G band) merged with those of CM (Figure 1f). [30] The presence of the D band corresponds to the defective (sp 3 ) carbon whereas the presence of the G band is associated with the graphitic (sp 2 ) carbon in the system.…”

Section: Synthesis and Characterization Of Fg@cmmentioning

confidence: 99%

High Rate, Dendrite Free Lithium Metal Batteries of Extended Cyclability via a Scalable Separator Modification Approach

Yadav,

Thakur,

Maity

et al. 2023

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Owing to their great promise of high energy density, the development of safer lithium metal batteries (LMBs) has become the necessity of the hour. Herein, a scalable method based on conventional Celgard membrane (CM) separator modification is adopted to develop high‐rate (10 mA cm‒2) dendrite‐free LMBs of extended cyclability (>1000 hours, >1500 cycles with 3 mA cm‒2, the bare fails within 50 cycles) with low over potential losses. The CM modification method entails the deposition of thin coatings of (≈6.6 µm) graphitic fluorocarbon (FG) via a large area electrophoretic deposition, where it helps for the formation of a stable LiF and carbon rich solid electrolyte interface (SEI) aiding a uniform lithium deposition even in higher fluxes. The FG@CM delivers a high transport number for Li ion (0.74) in comparison to the bare CM (0.31), indicating a facile Li ion transport through the membrane. A mechanistic insight into the role of artificial SEI formation with such membrane modification is provided here with a series of electrochemical as well as spectroscopic in situ/ex situ and postmortem analyses. The simplicity and scalability of the technique make this approach unique among other reported ones towards the advancement of safer LMBs of high energy and power density.

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“…The derivatives of graphene mainly include graphene oxide, graphane, and fluorinated graphene (FG) [17][18][19][20][21][22]. Fluorinated graphene includes partially fluorinated graphene and all fluorinated graphene.…”

Section: Introductionmentioning

confidence: 99%

The Preparations of Fluorographene Nanosheets and Research in Tribological Properties in High Vacuum

Zhang

Gao

et al. 2023

Materials

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In this study, fluorographene nanosheets (FG nanosheets) were prepared via the solvent-ultrasonic exfoliation method. The fluorographene sheets were observed using field-emission scanning electron microscopy (FE-SEM). The microstructure of the as-prepared FG nanosheets was characterized by X-ray diffraction (XRD) and a thermal analyzer (TG). The tribological properties of FG nanosheets as an additive in ionic liquids in high vacuum were compared to that of ionic liquid (IL) with graphene (IL-G). The wear surfaces and transfer films were analyzed via an optical microscope, Raman spectroscopy, scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The results show that FG nanosheets can be obtained from the simple solvent-ultrasonic exfoliation method. The prepared G nanosheets are a sheet, and the longer the ultrasonic time is, the thinner the sheet is. Ionic liquids with FG nanosheets had low friction and a low wear rate under high vacuum conditions. The improved frictional properties were attributed to the transfer film of FG nanosheets and more formation film of Fe-F.

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Fluorographene: Synthesis and sensing applications

Cited by 10 publications

References 44 publications

Scanning Photoelectron Spectro‐Microscopy: A Modern Tool for the Study of Materials at the Nanoscale

Scanning Photoelectron Spectro‐Microscopy: A Modern Tool for the Study of Materials at the Nanoscale

High Rate, Dendrite Free Lithium Metal Batteries of Extended Cyclability via a Scalable Separator Modification Approach

The Preparations of Fluorographene Nanosheets and Research in Tribological Properties in High Vacuum

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