Lateral Size of Graphene Characterized by Atomic Force Microscope

Liu, Zheng; Liu, Wenjun; Xie, Xue; Zhao, Wenzhe; Wen, Yu; Wang, QinSheng; Ou, Bingxian

doi:10.1088/1755-1315/252/2/022022

Cited by 6 publications

(8 citation statements)

References 19 publications

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“…However, the choice of the method can affect the result. 46 This is often the measurement of the biggest length of a single sheet of GBM.…”

Section: Discussionmentioning

confidence: 99%

“…However, they are distinct characteristics and need to be both characterized. The lateral size is mostly measured by electron microscopy or AFM. However, the choice of the method can affect the result . This is often the measurement of the biggest length of a single sheet of GBM. The median agglomerate size, often measured by DLS, is a measurement of the GBM size agglomerates in a chosen media.…”

Section: Discussionmentioning

confidence: 99%

“…The lateral size is mostly measured by electron microscopy or AFM. However, the choice of the method can affect the result . This is often the measurement of the biggest length of a single sheet of GBM.…”

Section: Discussionmentioning

confidence: 99%

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Graphene-Based Materials In Vitro Toxicity and Their Structure–Activity Relationships: A Systematic Literature Review

Achawi

Pourchez

Feneon

et al. 2021

Chem. Res. Toxicol.

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The unique properties of graphene-based materials (GBMs) placed them among the most exciting nanomaterials of the past decade. Scientists and industrials are looking forward to working with not only performant, but also safe, sustainable GBMs. Designing a safer-by-design GBM implies to acquire the knowledge of which physicochemical characteristics (PCCs) can increase toxicity.In this systematic review, we extracted data from the literature to provide the available information about the structure-activity relationship of GBMs. 93 papers studying a total of 185 GBMs were included. Graphene oxides (GOs) and Few-layer graphenes (FLGs) are the most studied GBMs.While reduced graphene oxides (rGOs) were often classified as poorly oxidant and weakly cytotoxic, graphene quantum dots (GQDs) were mostly moderately or highly cytotoxic. FLGs demonstrated relationships between median size and oxidative stress, between lateral size and both cytotoxicity and oxidative stress and between thickness and cytotoxicity. We also underlined relationships between median size, lateral size and thickness of GOs and oxidative stress.However, it appeared difficult to highlight clear structure-activity relationships for most PCCs and biological endpoints because despite a large amount of available data, the GBMs are often too poorly characterized in terms of PCCs descriptors and the biological endpoints investigation is not standardized enough. There is an urgent need for a better standardization of the experimental investigation of both PCCs and biological endpoints to allow research teams to play a part in the collaborative work toward the construction of a safer-by-design GBM through a better understanding of their key toxicity drivers.

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“…However, the choice of the method can affect the result. 46 This is often the measurement of the biggest length of a single sheet of GBM.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Graphene-Based Materials In Vitro Toxicity and Their Structure–Activity Relationships: A Systematic Literature Review

Achawi

Pourchez

Feneon

et al. 2021

Chem. Res. Toxicol.

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“…2 The environment of imprinted polymeric matrix being energetically advantageous for the template's particular binding, can be credited for contributing to high selectivity. 25 As a result, the imprinted cavities made by DIIP have a great attraction for templates and are complimentary to them in size. Hence this SPE method can be used for samples containing similar matrix ions.…”

Section: Assessment Of Imprinting Factor and Selectivity Coefficientmentioning

confidence: 99%

“…Moreover, the two-dimensional (2D) band has lower intensity peak relative to the G band, further supporting the incorporation of thiourea. 25 X-ray diffraction analysis (XRD) diffractogram was used to explore and compare the crystal structures of various materials that is, GO, DIIP, NIP, IIP-Cu, and IIP-Pb (Figure S1b). A significant peak arises at the 2θ $ 10.4 in GO, and the correlating interlayer spacing is around 0.85 nm, indicating the existence of oxygenated functional groups over GO.…”

Section: Characterizationmentioning

confidence: 99%

Self‐assembly of thiourea intercalated graphene oxide based dual IIP for the SPE coupled FAAS method development of Cu(II) and Pb(II) determination

Islam,

Rais

2024

J of Applied Polymer Sci

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A new dual‐template surface imprinted polymer for Cu(II) and Pb(II) was synthesized in one pot. Magnetic graphene oxide was self‐assembled with low cost and environmentally benign thiourea. Presence of sulfur and nitrogen donor atoms provide hooks for coordination and partial reduction of graphene oxide matrix. It was used as an solid‐phase extraction adsorbent for extraction, preconcentration, and coupled with flame atomic absorption spectrometry to manifest performance comparable with inductively coupled plasma atomic emission spectrometry (ICPAES) both in terms of quantification limit as well as interference. The critical experimental parameters such as pH; 4.6, contact time of 15 min and initial concentration of 777 (Qe; 227 mg g−1) and 800 μg L−1 (Qe; 273 mg g−1) for Cu(II) and Pb(II), respectively, were optimized using RSM‐CCD and artificial neural network. The adsorption process was kinetically faster (50% adsorption in 5 min), following fractal‐like‐pseudo‐second‐order (FLPSO) kinetics and Brouers–Sotolongo isotherm model owing to the heterogenous energy landscape. The imprinting factors were in the range of 4–7 in the presence of all coexisting ions. The proposed method was robust in the determination and removal of Cu(II) and Pb(II) from food, ground water, and industry effluents with low limit of detection (Cu(II); 1.03 μg L−1 & Pb(II); 1.79 μgL−1). Spiking and recovery tests were used to assess the method's accuracy. Cu(II)/Pb(II) loaded dual template IIP (DIIP) was utilized to remove anionic dyes with >95% efficiency. Thorough examination of the method and material selectivity (in binary, ternary, and multielement system), multi fold applications of determination, removal of Cu(II), Pb(II), and removal of anionic dyes makes DIIP a promising candidate for environmental remediation.

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Spectroscopic and Microscopic Investigations of 2D Nanomaterials

Kumar,

Sahu

2024

Two‐Dimensional Nanomaterials‐Based Polymer Nanocomposites

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Lateral Size of Graphene Characterized by Atomic Force Microscope

Cited by 6 publications

References 19 publications

Graphene-Based Materials In Vitro Toxicity and Their Structure–Activity Relationships: A Systematic Literature Review

Graphene-Based Materials In Vitro Toxicity and Their Structure–Activity Relationships: A Systematic Literature Review

Self‐assembly of thiourea intercalated graphene oxide based dual IIP for the SPE coupled FAAS method development of Cu(II) and Pb(II) determination

Spectroscopic and Microscopic Investigations of 2D Nanomaterials

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