Preparation of flexible resistive micro-humidity sensors using quaternary ammonium salt-modified graphene oxide and their humidity-sensing properties

Yun, Sang-Woo; Gong, Myoung‐Seon

doi:10.1007/s13233-014-2145-3

Cited by 11 publications

(6 citation statements)

References 34 publications

(32 reference statements)

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“…These conductance modeling results appear to be consistent in sign with three published experimental studies, which measured a decrease in resistance for graphene oxide sensors exposed to H 2 O, 70 an increase in resistance for reduced graphene oxide sensors exposed to H 2 O, 71 and an increase in resistance for reduced graphene oxide sensors exposed to DNT. 25 With regard to the explosive target molecules, the conductance changes in the functionalized configurations are on average less than those for the pristine graphene cases, while the adsorption energies are on average increased.…”

Section: ■ Results and Discussionsupporting

confidence: 91%

Graphene-Based Sensing of Gas-Phase Explosives

Zhang

Fahrenthold

2019

ACS Appl. Nano Mater.

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Graphene based sensors have shown excellent potential in the trace detection of specific gases which are hazardous to humans or environmentally toxic. Sensor designs incorporating pristine graphene, graphene oxide, and nanopatterned graphene have been the focus of much recent experimental and computational research. The application of graphene based sensors in the trace detection of explosives has seen relatively limited study, due in part to the difficulties of conducting experiments using the nitramine and aromatic explosives of central interest. Computational studies of explosive sensors are not subject to hazardous materials handling constraints, and may be used to complement experimental research on the development of low weight, low power, graphene-based sensors. Ab initio models of five different graphene nanoribbon sensor configurations have been developed, and their chemiresistive response to three widely used explosives and four background gases has been investigated. The results indicate that the sensitivity and selectivity of nanoribbon devices exposed to mixtures of explosives and background gases will vary significantly with explosive type and sensor configuration.

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Section: ■ Results and Discussionsupporting

confidence: 91%

Graphene-Based Sensing of Gas-Phase Explosives

Zhang

Fahrenthold

2019

ACS Appl. Nano Mater.

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“…3b), the former peak becomes weaker and the latter becomes broader. At the same time, GO-GTA exhibits new bands at 2,943 and 2,867 cm 21 , which fall within the range of the symmetric and asymmetric stretching modes of the C-H [29]. In addition, the band located at 976 cm 21 corresponds to C-N stretching vibrations of GO-GTA.…”

Section: Synthesis and Characterization Of Go And Uhmwpe-g-gomentioning

confidence: 79%

Preparation of compatibilizer with large specific surface and its application in immiscible polymer blends with ultra‐high molecular weight

Wang

Xing

Meng

et al. 2016

Polymer Engineering & Sci

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In this work, a compatibilizer (UHMWPE‐g‐GO) with large specific surface was prepared from graphene oxide (GO) and ultra‐high molecular weight polyethylene (UHMWPE). First, GO was modified by 2, 3‐epoxypropyltrimethylammonium chloride (GTA), subsequently grafted with UHMWPE. UHMWPE‐g‐GO was used to compatibilize the immiscible monomer casting (MC) nylon/UHMWPE blends. With the addition of very low content of UHMWPE‐g‐GO, the compatibility of UHMWPE and the matrix (MC nylon) was remarkably improved without visible agglomerates, which was proved by photographs, scanning electron microscope, dynamic thermomechanical analysis, and contact angle measurement. Therefore, thermal stability, mechanical and tribological properties were obviously increased. A dramatic increment of 94.1% in the impact strength and a decrement of 39.4% in the coefficient friction were observed in the presence of UHMWPE‐g‐GO in the immiscible polymer blends. The approach used in this work was an efficient strategy for immiscible polymer blends with ultra‐high molecular weight. POLYM. ENG. SCI., 57:335–344, 2017. © 2016 Society of Plastics Engineers

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“…The spectrum of GTA-GO exhibits additional bands at 1474 and 1383 cm −1 , which are related to the N–CH 3 stretching vibrations. In addition, the bands located between 1145 and 1047 cm −1 corresponded to C–O and C–N stretching vibrations of GTA-GO [15, 20]. These results indicate that GTA has successfully attached to the GO surface by way of covalent bonding [15].…”

Section: Resultsmentioning

confidence: 99%

“…The brief illustrate is described in the Supplementary information. The synthesis of GTA modified GO is illustrated in Figure 1 [15], 0.2 g GO was dispersed in 100 mL water via stirring and ultrasonication for 0.5 h. The aqueous suspension of GO was introduced into a three-necked round bottom flask (250 mL) equipped with a mechanical stirrer, a nitrogen inlet and a reflux condenser. 2.5 g GTA was added to the suspension agitating for 1 h at room temperature and then at 80°C for 12 h protected by N 2 .…”

Section: Methodsmentioning

confidence: 99%

Functionalised graphene oxide-bromobutyl rubber composites with segregated structure for enhanced gas barrier properties

Zhang

et al. 2021

Plastics, Rubber and Composites

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Graphene-based elastomer composites with a segregated structure were prepared by electrostatic self-assembly. The morphology and microstructures of the composites were characterised by scanning electron microscope (SEM) and transmission electrical microscope (TEM). The segregated network leads to a low gas permeability coefficient for BIIR composites. With the incorporation as low as 0.4 wt-% GTA-GO, the helium permeability coefficient decreased about 63% when compared with that of neat BIIR. The tensile strength and percentage elongation increased with an increase in the GTA-GO content. This is attributed to the complete exfoliation, uniform dispersion and the segregated structure of GTA-GO in the BIIR matrix. These results demonstrate that such electrostatic self-assembly method between latex and sheet-fillers is an effective strategy to design and produce polymeric nanocomposites with good gas barrier properties. The results will effectively promote the application of barrier polymer in the production of protective clothing, gas storage devices and coatings.

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Preparation of flexible resistive micro-humidity sensors using quaternary ammonium salt-modified graphene oxide and their humidity-sensing properties

Cited by 11 publications

References 34 publications

Graphene-Based Sensing of Gas-Phase Explosives

Graphene-Based Sensing of Gas-Phase Explosives

Preparation of compatibilizer with large specific surface and its application in immiscible polymer blends with ultra‐high molecular weight

Functionalised graphene oxide-bromobutyl rubber composites with segregated structure for enhanced gas barrier properties

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