Graphene Oxide Scroll Meshes Prepared by Molecular Combing for Transparent and Flexible Electrodes

Wu, Jumiati; Yang, Jian; Huang, Ying; Li, Hai; Fan, Zhanxi; Liu, Juqing; Cao, Xiehong; Huang, Xiao; Huang, Wei; Zhang, Hua

doi:10.1002/admt.201600231

Cited by 15 publications

(17 citation statements)

References 35 publications

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“…Recently, GO scroll meshes were fabricated by cross-stacking GO scroll in combination of molecular combing and dry transfer technique. 6,11,12,52 We found that GO scroll meshes can be used as transparent and exible electrodes and show excellent electrical stability aer being bent more than 10 000 cycles. In this work, Ag NPs were rstly encapsulated into GO scroll to form GO-Ag scroll by molecular combing.…”

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Graphene oxide scroll meshes encapsulated Ag nanoparticles for humidity sensing

et al. 2017

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“…GO-Ag scroll meshes were fabricated by using dry transfer method as previously reported. 11 Firstly, horizontally and perpendicularly aligned GO-Ag scrolls arrays were prepared using molecular combing method ( Fig. S4 in ESI †), respectively.…”

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Graphene oxide scroll meshes encapsulated Ag nanoparticles for humidity sensing

et al. 2017

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“…Thus the hydrophobic OTS–SiO 2 /Si substrate was obtained. Finally, GONS and rGONS was prepared by molecular combing GO and rGO solutions with various pH on the OTS–SiO 2 /Si substrates [13,17,23,26], respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Graphene and graphene oxide nanoscrolls (GONS) have attracted significant attention due to their excellent electrical and mechanical properties, which stem from their opened ends and adjustable interlayer distance [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22]. GONS has shown broad applications in the fields of sensors, supercapacitors, field effect transistors, energy storage, and so on [13,14,17,22,23,24,25,26]. Various nanomaterials, such as nanoparticles, nanowires, and small molecules can be encapsulated into GONSs to further improve their performance [13,14,15,19,20,27,28,29,30,31,32,33].…”

Section: Introductionmentioning

confidence: 99%

Impact of pH on Regulating Ion Encapsulation of Graphene Oxide Nanoscroll for Pressure Sensing

et al. 2019

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Recently, graphene oxide nanoscroll (GONS) has attracted much attention due to its excellent properties. Encapsulation of nanomaterials in GONS can greatly enhance its performance while ion encapsulation is still unexplored. Herein, various ions including hydronium ion (H3O+), Fe3+, Au3+, and Zn2+ were encapsulated in GONSs by molecular combing acidic graphene oxide (GO) solution. No GONS was obtained when the pH of the GO solution was greater than 9. A few GONSs without encapsulated ion were obtained at the pH of 5–8. When the pH decreased from 5 to 0.15, high-density GONSs with encapsulated ions were formed and the average height of GONS was increased from ~50 to ~190 nm. These results could be attributed to the varied repulsion between carboxylic acid groups located at the edges of GO nanosheets. Encapsulated metal ions were converted to nanoparticles in GONS after high-temperature annealing. The resistance-type device based on reduced GONS (rGONS) mesh with encapsulated H3O+ showed good response for applied pressure from 600 to 8700 Pa, which manifested much better performance compared with that of a device based on rGONS mesh without H3O+.

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“…Taking humidity sensing as an example, to meet sensitivity requirements, new methods have been sought to improve existing sensors based on various transduction techniques and novel materials . In the pursuit of ideal humidity‐sensing materials, 2D graphene and related materials (e.g., graphene oxide, GO) have emerged as promising candidates because they show enticing physical/chemical properties (e.g., tunable electrical property, mechanical flexibility, and a large surface to volume ratio) and have broad applications (e.g., energy conversion, smart robots, and biomedical devices). Recently, Ariga and co‐workers achieved highly selective gas sensing using ionic liquid‐intercalated graphene layers that were prepared by in situ reduction of graphene oxide layers in the presence of nonvolatile ionic liquids, and subsequent electrostatic layer‐by‐layer assembly .…”

Section: Introductionmentioning

confidence: 99%

Sunlight‐Reduced Graphene Oxides as Sensitive Moisture Sensors for Smart Device Design

Han

Zhang

et al. 2017

Adv Materials Technologies

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a large surface to volume ratio [7] ) and have broad applications (e.g., energy conversion, [8] smart robots, [9] and biomedical devices [10] ). Recently, Ariga and co-workers achieved highly selective gas sensing using ionic liquid-intercalated graphene layers that were prepared by in situ reduction of graphene oxide layers in the presence of nonvolatile ionic liquids, and subsequent electrostatic layer-by-layer assembly. [11] Sadasivuni et al. presented the layer-bylayer spraying of modified graphene oxidefilled cellulose nanocrystals for proximity sensing. [12] Wang et al. reported ultrathin reduced graphene oxide (RGO) films with controllable thicknesses for noncontact relative humidity (RH) sensing. [13] In our previous works, an RGO with hierarchical micro-nanostructures prepared by two-beam-laser interference was employed to produce humidity-sensing devices. [14] However, in spite of these advancements, graphene-based sensing devices have not been well employed for smart device design. A possible reason for this gap would be the difficulty in tailoring highly permeable graphene nanostructures that permit spontaneous, timely, and reliable molecular discrimination. Moreover, complex experimental procedures or special instruments are generally necessary in device fabrication, which largely limits their integration with other devices. The current trend is to produce smart devices equipped with versatile sensors created in facile, reliable, cost-effective, and environmentally friendly manners. However, it is currently challenging to achieve this goal.Herein, we report a facile preparation of a graphene-based moisture detector for smart device design. A humidity-sensing device has been fabricated by a simple focused sunlight treatment of GO. The drastic removal of oxygen-containing groups (OCGs) not only mediates the controllable tuning of conductive properties but also leads to the formation of a highly porous RGO structure that is of benefit to the adsorption of molecules and humidity sensitivity. The RGO-based humidity-sensing device shows moisture recognition capability and excellent sensing performance, including high sensitivity, good repeatability, small humidity hysteresis, and fast response recovery at room temperature, enabling a series of humidity-sensing devices including a moisture controller, a humidity detector robot, and even a novel electronic harmonica. As a simple and chemical-free method, sunlight-mediated photoreduction of GO provides a very simple and cost-effective way to integrate humidity sensors in the development of versatile moistureresponsive smart devices.Here, a facile fabrication of graphene-based humidity sensors is reported for smart device design. Focused sunlight photoreduction of graphene oxide (GO) helps to remove most of the oxygen-containing groups on GO sheets, which not only recovers their conductivity but also leads to the formation of a highly porous nanostructure, enabling the manufacture of versatile humidity-sensing smart devices, such as moisture controllers, hu...

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Graphene Oxide Scroll Meshes Prepared by Molecular Combing for Transparent and Flexible Electrodes

Cited by 15 publications

References 35 publications

Graphene oxide scroll meshes encapsulated Ag nanoparticles for humidity sensing

Graphene oxide scroll meshes encapsulated Ag nanoparticles for humidity sensing

Impact of pH on Regulating Ion Encapsulation of Graphene Oxide Nanoscroll for Pressure Sensing

Sunlight‐Reduced Graphene Oxides as Sensitive Moisture Sensors for Smart Device Design

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