Controllable and air-stable graphene n-type doping on phosphosilicate glass for intrinsic graphene

Park, Hyung-Youl; Yoon, Jin Sang; Jeon, Jeaho; Kim, Jin-Ok; Jo, Seo Hyeon; Yu, Hyun Yong; Lee, Sungjoo; Park, Jin‐Hong

doi:10.1016/j.orgel.2015.03.039

Cited by 13 publications

(6 citation statements)

References 27 publications

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“…A mathematic model analysis (eqs and ) was also discussed in detail to further confirm the result. It is generally known that most graphene-based materials exhibit p-type semiconductor behavior under atmospheric ambient with holes as the main carriers, because graphene tends to be heavily p-doped by adsorbing H 2 O and O 2 molecules in ambient air. − Without exception, all of the graphene-based sensing materials in our work exhibit p-type semiconductor behavior, which provides the foundation of the mathematic model in this paper. The specific mathematic model of response for graphene-based sensors. Where R 0 is a constant, q is the quantity of electric charge, p air and p gas are the hole concentrations in air and NO 2 respectively, is the total effective area to NO 2 , μ p is the mobility of hole, ξ is the electric field intensity, D p is the hole-diffusion coefficient, χ is the plate distance, R c is the resistance of nonsensing region, n i is a constant, n is the electron concentrations, E i and E F are the energy of the Fermi and the current material respectively, K is the Boltzmann’s constant, and T is the sensing temperature.…”

Section: Resultsmentioning

confidence: 78%

Three-Dimensional Crumpled Graphene-Based Nanosheets with Ultrahigh NO₂ Gas Sensibility

Chen

Wang

Umar

et al. 2017

ACS Appl. Mater. Interfaces

102

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It is well-established that the structures dominate the properties. Inspired by the highly contorted and crumpled maxilloturbinate inside dog nose, herein an artificial nanostructure, i.e., 3D crumpled graphene-based nanosheets, is reported with the simple fabrication, detailed characterizations, and efficient gas-sensing applications. A facile supramolecular noncovalent assembly is introduced to modify graphene with functional molecules, followed with a lyophilization process to massively transform 2D plane graphene-based nanosheets to 3D crumpled structure. The detailed morphological characterizations reveal that the bioinspired nanosheets exhibit full consistency with maxilloturbinate. The fabricated 3D crumpled graphene-based sensors exhibit ultrahigh response (R/R = 3.8) toward 10 ppm of NO, which is mainly attributed to the specific maxilloturbinate-mimic structure. The sensors also exhibit excellent selectivity and sensing linearity, reliable repeatability, and stability. Interestingly, it is observed that only 4 mg of graphene oxide (GO) raw materials can produce more than 1000 gas sensors, which provides a new insight for developing novel 3D biomimetic materials in large-scale gas sensor production.

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Section: Resultsmentioning

confidence: 78%

Three-Dimensional Crumpled Graphene-Based Nanosheets with Ultrahigh NO₂ Gas Sensibility

Chen

Wang

Umar

et al. 2017

ACS Appl. Mater. Interfaces

102

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“…Therefore, numerous studies have been conducted by the researchers to synthesize graphene at a large scale, including its derivatives such as graphene oxide (GO), reduced graphene oxide (rGO), and thermally reduced graphene oxide (TRG) [ 14 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. The remarkable electrical, mechanical and optical properties of graphene sheets, and GQDs render them attractive materials for use in electronic, optoelectronic, and aerospace industries [ 35 , 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

Graphene Nanomaterials: Synthesis, Biocompatibility, and Cytotoxicity

Liao

Tjong

2018

IJMS

374

272

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Graphene, graphene oxide, and reduced graphene oxide have been widely considered as promising candidates for industrial and biomedical applications due to their exceptionally high mechanical stiffness and strength, excellent electrical conductivity, high optical transparency, and good biocompatibility. In this article, we reviewed several techniques that are available for the synthesis of graphene-based nanomaterials, and discussed the biocompatibility and toxicity of such nanomaterials upon exposure to mammalian cells under in vitro and in vivo conditions. Various synthesis strategies have been developed for their fabrication, generating graphene nanomaterials with different chemical and physical properties. As such, their interactions with cells and organs are altered accordingly. Conflicting results relating biocompatibility and cytotoxicity induced by graphene nanomaterials have been reported in the literature. In particular, graphene nanomaterials that are used for in vitro cell culture and in vivo animal models may contain toxic chemical residuals, thereby interfering graphene-cell interactions and complicating interpretation of experimental results. Synthesized techniques, such as liquid phase exfoliation and wet chemical oxidation, often required toxic organic solvents, surfactants, strong acids, and oxidants for exfoliating graphite flakes. Those organic molecules and inorganic impurities that are retained in final graphene products can interact with biological cells and tissues, inducing toxicity or causing cell death eventually. The residual contaminants can cause a higher risk of graphene-induced toxicity in biological cells. This adverse effect may be partly responsible for the discrepancies between various studies in the literature.

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“…Owing to the sp 2 hybridization of carbon atoms, graphene can exhibit interesting thermal, electrical, mechanical, and optical properties. Graphene has attracted much attention for its biological safety and extensive application potential in various areas of energy, environmental, and biomedical science (Lu et al, 2013; Park et al, 2015; Shadjou & Hasanzadeh, 2016; Shi et al, 2013; Zhang, Xia, Zhao, Liu, & Zhang, 2010). At present, most in vivo toxicity studies focus on the effects of graphene and its derivatives on the respiratory system by nose‐only inhalation, intratracheal instillation, or pharyngeal aspiration.…”

Section: Introductionmentioning

confidence: 99%

Comparative proteomic analysis reveals cytotoxicity induced by graphene oxide exposure in A549 cells

Liao

Wang

et al. 2020

J of Applied Toxicology

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Several studies in recent years have demonstrated the broad application prospects of graphene and its derivatives in many fields such as composite material industry, energy storage, antimicrobial materials, and biomedicine. Large‐scale production and wide application also bring greater potential exposure risks, and there has been an increasing concern about the potential health hazards of graphene nanomaterials. In the present study, we exploited nonlabeled proteomics and bioinformatics analysis to examine the proteomic response to graphene oxide (GO) and unveil a systematic view of molecular targets and possible mechanisms underlying cytotoxicity of GO in A549 cells. Overall, 89 proteins were found to be differentially expressed at different exposure levels. These differentially expressed proteins were involved in several biological processes and signal transduction pathways such as messenger RNA (mRNA) splicing, negative regulation of plasminogen activation, extracellular matrix organization, positive regulation of cell migration, complement and coagulation cascades, p53 signaling pathway, and transcriptional misregulation in cancer. It is suggested that GO may exert toxic effects on cells by regulating gene transcription, immune response, cell growth, and apoptosis. Ingenuity pathway analysis showed that SMARCA4, TGF‐β1, and TP53 were located at the center of the protein interaction network and considered as key node proteins regulating GO toxicity. In general, these findings will augment our knowledge of the involved mechanisms and aid in developing develop useful biomarkers for GO‐induced pulmonary toxicity.

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Controllable and air-stable graphene n-type doping on phosphosilicate glass for intrinsic graphene

Cited by 13 publications

References 27 publications

Three-Dimensional Crumpled Graphene-Based Nanosheets with Ultrahigh NO₂ Gas Sensibility

Three-Dimensional Crumpled Graphene-Based Nanosheets with Ultrahigh NO₂ Gas Sensibility

Graphene Nanomaterials: Synthesis, Biocompatibility, and Cytotoxicity

Comparative proteomic analysis reveals cytotoxicity induced by graphene oxide exposure in A549 cells

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Controllable and air-stable graphene n-type doping on phosphosilicate glass for intrinsic graphene

Cited by 13 publications

References 27 publications

Three-Dimensional Crumpled Graphene-Based Nanosheets with Ultrahigh NO2 Gas Sensibility

Three-Dimensional Crumpled Graphene-Based Nanosheets with Ultrahigh NO2 Gas Sensibility

Graphene Nanomaterials: Synthesis, Biocompatibility, and Cytotoxicity

Comparative proteomic analysis reveals cytotoxicity induced by graphene oxide exposure in A549 cells

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Product

Resources

About

Three-Dimensional Crumpled Graphene-Based Nanosheets with Ultrahigh NO₂ Gas Sensibility

Three-Dimensional Crumpled Graphene-Based Nanosheets with Ultrahigh NO₂ Gas Sensibility