Fluorinated Boron Nitride Quantum Dots: A New 0D Material for Energy Conversion and Detection of Cellular Metabolism

Radhakrishnan, Shankar; Park, Jun Hyoung; Neupane, Ram; Reyes, Carlos A. de los; Sudeep, Parambath M.; Paulose, Maggie; Martí, Ángel A.; Tiwary, Chandra Sekhar; Khabashesku, Valéry N.; Varghese, Oomman K.; Kaipparettu, Benny Abraham; Ajayan, Pulickel M.

doi:10.1002/ppsc.201800346

Cited by 15 publications

(10 citation statements)

References 54 publications

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“…After Ar/SF 6 plasma treatment (Fig. 4b), the peak related to h-BN was noticed to completely disappear with the appearance of two new peaks, the first one at binding energy of 191.4 eV and can be assigned to B-F bond [31,32] and a second new peak at 193.0 eV which can be assigned to [28,29]. This indicates that the surface of BNNS is completely oxidized/ fluorized after Ar/SF 6 plasma.…”

Section: Resultsmentioning

confidence: 87%

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Effect of Tetrafluorethane and Sulfur Hexafluoride Plasma Treatment on Wettability of Boron Nitride Nano-Sheets

et al. 2019

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Boron nitride nanosheets (BNNS) consisting of 2D hexagonal boron nitride nano-layers were deposited, onto silicon substrates, via chemical vapour deposition process at 1000 • C. The BNNS were functionalized in argon plasma admixed with sulfur hexafluoride (SF6) or tetrafluorethane (C2H2F4) gases. Scanning electron microscope (SEM), High resolution transmission electron microscope (HRTEM), X-ray photoelectron spectroscopy (XPS), and Water contact angle (WCA) measurements were used to characterize the BNNS before and after plasma modification. Significant changes in the surface features, upon plasma treatments of the BNNS, were noticed during scanning and transmission electron microscopy examinations. The XPS analyses revealed an extensive surface fluorination in the case of Ar/SF6 plasma, while formation of fluoro-carbon layer coating on the surface of BNNS was noticed in the case of Ar/C2H2F4 plasma. Furthermore, the plasma treatments made BNNS super-hydrophobic with a contact angle as high as 167.9 • compared to 118.2 • for the untreated BNNS. The wettability of the nanostructures, as measured form the water contact angle measurements, is discussed by referring to changes in surface chemistry and morphology after plasma treatment. The stability of BNNS at high temperatures, coupled with plasma treatment can make this material a potential candidate as super-hydrophobic coating for self-cleaning application at the industrial level.

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Section: Resultsmentioning

confidence: 87%

“…5b) formed due to presence of N-H bond [33] or amide group [29]. In addition, the peak related to B-N bond completely disappears while a peak that can be attributed to t-BN or N-F [31,32] becomes the most intense. This t-BN is already observed in HRTEM of BNNS after Ar/SF6 plasma covering the entire surface of BNNS walls.…”

Section: B-o Bond or F-b-f Bondmentioning

confidence: 99%

Effect of Tetrafluorethane and Sulfur Hexafluoride Plasma Treatment on Wettability of Boron Nitride Nano-Sheets

et al. 2019

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“…Radhakrishnan et al [58] reported the synthesis of fluorinated BNQDs (FBNQDs) by the hydrothermal fluorination of BN nanosheets using DMF and Nafion. Nafion acted as the source for highly reactive fluorine-free radicals which reacted with BN nanosheets to break it down to form FBNQDs.…”

Section: Other Methodsmentioning

confidence: 99%

“…Therefore, the extracellular pH of tumor cells is often acidic, leading to a high extracellular acidification rate (ECAR) compared to benign cells. Radhakrishnan et al [58] reported the use of the glycolytic inhibitor, 3-bromopyruvate(3-BP), to suppress ECAR. This was demonstrated by monitoring the increase in fluorescence from FBNQDs, as a method to detect the glycolytic activity in cancer cells.…”

Section: Biosensingmentioning

confidence: 99%

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A Review on van der Waals Boron Nitride Quantum Dots

Acharya

Sharma

Liu

et al. 2021

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Boron nitride quantum dots (BNQDs) have gained increasing attention for their versatile fluorescent, optoelectronic, chemical, and biochemical properties. During the past few years, significant progress has been demonstrated, started from theoretical modeling to actual application. Many interesting properties and applications have been reported, such as excitation-dependent emission (and, in some cases, non-excitation dependent), chemical functionalization, bioimaging, phototherapy, photocatalysis, chemical, and biological sensing. An overview of this early-stage research development of BNQDs is presented in this article. We have prepared un-bias assessments on various synthesis methods, property analysis, and applications of BNQDs here, and provided our perspective on the development of these emerging nanomaterials for years to come.

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NBOH Site‐Activated Graphene Quantum Dots for Boosting Electrochemical Hydrogen Peroxide Production

et al. 2023

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Carbon materials are considered promising 2/4 e− oxygen reduction reaction (ORR) electrocatalysts for synthesizing H2O2/H2O via regulating heteroatom dopants and functionalization. Here, various doped and functionalized graphene quantum dots (GQDs) are designed to reveal the crucial active sites of carbon materials for ORR to produce H2O2. Density functional theory (DFT) calculations predict that the edge structure involving edge N, B dopant pairs and further OH functionalization to the B (NBOH) is an active center for 2e− ORR. To verify the above predication, GQDs with an enriched density of NBOH (NBO‐GQDs) are designed and synthesized by the hydrothermal reaction of NH2 edge‐functionalized GQDs with H3BO3 forming six‐member heterocycle containing the NBOH structure. When dispersed on conductive carbon substrates, the NBO‐GQDs show H2O2 selectivity of over 90% at 0.7 –0.8 V versus reversible hydrogen electrode in the alkaline solution in a rotating ring‐disk electrode setup. The selectivity retains 90% of the initial value after 12 h stability test. In a flow cell setup, the H2O2 production rate is up to 709 mmol gcatalyst−1 h−1, superior to most reported carbon‐ and metal‐based electrocatalysts. This work provides molecular insight into the design and formulation of highly efficient carbon‐based catalysts for sustainable H2O2 production.

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Fluorinated Boron Nitride Quantum Dots: A New 0D Material for Energy Conversion and Detection of Cellular Metabolism

Cited by 15 publications

References 54 publications

Effect of Tetrafluorethane and Sulfur Hexafluoride Plasma Treatment on Wettability of Boron Nitride Nano-Sheets

Effect of Tetrafluorethane and Sulfur Hexafluoride Plasma Treatment on Wettability of Boron Nitride Nano-Sheets

A Review on van der Waals Boron Nitride Quantum Dots

NBOH Site‐Activated Graphene Quantum Dots for Boosting Electrochemical Hydrogen Peroxide Production

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