Insight into the ultrasonication of graphene oxide with strong changes in its properties and performance for adsorption applications

This study focused on the uniform distribution of graphene oxide (GO) nanosheets in cement composites and their effect on microstructure and performance. For this, three polymer dispersants with different level of polar groups (weak, mild, and strong) poly(acrylamide-methacrylic acid) (PAM), poly(acrylonitrile-hydroxyethyl acrylate) (PAH), and poly(allylamine-acrylamide) (PAA) were used to form intercalation composites with GO nanosheets. The results indicated that GO nanosheets can exist as individual 1–2, 2–5, and 3–8 layers in GO/PAA, GO/PAH, and GO/PAM intercalation composites, respectively. The few-layered (1–2 layers) GO can be uniformly distributed in cement composites and promote the formation of regular-shaped crystals and a compact microstructure. The compressive strengths of the blank, control, GO/PAM, GO/PAH, and GO/PAA cement composites were 55.72, 78.31, 89.75, 116.82, and 128.32 MPa, respectively. Their increase ratios relative to the blank sample were 40.54%, 61.07%, 109.66%, and 130.29%, respectively. Their corresponding flexural strengths were 7.53, 10.85, 12.35, 15.97, and 17.68 MPa, respectively, which correspond to improvements of 44.09%, 64.01%, 112.09%, and 134.79%.

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Insight into the Nanoscale Mechanism of Rapid H2O Transport within a Graphene Oxide Membrane: Impact of Oxygen Functional Group Clustering

ACS Applied Materials & Interfaces ◽

10.1021/acsami.5b08824 ◽

2015 ◽

Vol 8 (1) ◽

pp. 321-332 ◽

Cited By ~ 38

Author(s):

Shuai Ban ◽

Jing Xie ◽

Yajun Wang ◽

Bo Jing ◽

Bei Liu ◽

...

Keyword(s):

Graphene Oxide ◽

Functional Group ◽

Oxygen Functional Group ◽

Oxide Membrane ◽

Insight Into

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A facile immobilization of polyphenol oxidase enzyme on graphene oxide and reduced graphene oxide thin films: An insight into in-vitro activity measurements and characterization

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2018.11.041 ◽

2019 ◽

Vol 562 ◽

pp. 179-185 ◽

Cited By ~ 9

Author(s):

Bahri Gür ◽

Muhammed Emre Ayhan ◽

Ayşe Türkhan ◽

Fatma Gür ◽

Elif Duygu Kaya

Keyword(s):

Thin Films ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Polyphenol Oxidase ◽

In Vitro Activity ◽

Reduced Graphene ◽

Activity Measurements ◽

Oxidase Enzyme ◽

Insight Into

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Elucidation and refinement of synthetic receptor mechanisms

10.1101/2020.04.16.045039 ◽

2020 ◽

Author(s):

Hailey I. Edelstein ◽

Patrick S. Donahue ◽

Joseph J. Muldoon ◽

Anthony K. Kang ◽

Taylor B. Dolberg ◽

...

Keyword(s):

Transmembrane Domain ◽

Functional Performance ◽

Resonance Energy Transfer ◽

Resonance Energy ◽

Performance Characteristics ◽

Therapeutic Gene ◽

High Performing ◽

Synthetic Receptor ◽

And Performance ◽

Insight Into

ABSTRACTSynthetic receptors are powerful tools for engineering mammalian cell-based devices. These biosensors enable cell-based therapies to perform complex tasks such as regulating therapeutic gene expression in response to sensing physiological cues. Although multiple synthetic receptor systems now exist, many aspects of receptor performance are poorly understood. In general, it would be useful to understand how receptor design choices influence performance characteristics. In this study, we examined the modular extracellular sensor architecture (MESA) and systematically evaluated previously unexamined design choices, yielding substantially improved receptors. A key finding that might extend to other receptor systems is that the choice of transmembrane domain (TMD) is important for generating high-performing receptors. To provide mechanistic insights, we adopted and employed a Förster resonance energy transfer (FRET)-based assay to elucidate how TMDs affect receptor complex formation and connected these observations to functional performance. To build further insight into these phenomena, we developed a library of new MESA receptors that sense an expanded set of ligands. Based upon these explorations, we conclude that TMDs affect signaling primarily by modulating intracellular domain geometry. Finally, to guide the design of future receptors, we propose general principles for linking design choices to biophysical mechanisms and performance characteristics.

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