Preparation of a Three-Dimensional Reduced Graphene Oxide Film by Using the Langmuir–Blodgett Method

Jaafar, Muhammad Musoddiq; Ciniciato, Gustavo Pio Marchesi Krall; Ibrahim, Siti Aisyah; Phang, Siew-Moi; Yunus, Kamran; Fisher, Adrian C.; Iwamoto, Mitsumasa; Periasamy, Vengadesh

doi:10.1021/acs.langmuir.5b02708

Cited by 39 publications

(22 citation statements)

References 52 publications

(100 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, recent studies have shown that when used in porous thin‐films processed from flakes or introduced in polymer composites, graphene‐based materials can exhibit dramatically improved performance for neural stimulation. For instance, porous graphene oxide electrodes reduced by laser treatment and by the Langmuir–Blodgett method have been reported to be able to stimulate neural tissues with outstanding charge injection values between 1 and 3 mC cm −2 . Furthermore, new promising materials are expected to emerge from the very active research field of the supercapacitors, in which graphene‐based materials exhibiting very large active surface area are being developed achieving very high double layer capacitance.…”

Section: Graphene Materials For Next‐generation Neural Interfacesmentioning

confidence: 99%

Graphene in the Design and Engineering of Next‐Generation Neural Interfaces

et al. 2017

View full text Add to dashboard Cite

Neural interfaces are becoming a powerful toolkit for clinical interventions requiring stimulation and/or recording of the electrical activity of the nervous system. Active implantable devices offer a promising approach for the treatment of various diseases affecting the central or peripheral nervous systems by electrically stimulating different neuronal structures. All currently used neural interface devices are designed to perform a single function: either record activity or electrically stimulate tissue. Because of their electrical and electrochemical performance and their suitability for integration into flexible devices, graphene-based materials constitute a versatile platform that could help address many of the current challenges in neural interface design. Here, how graphene and other 2D materials possess an array of properties that can enable enhanced functional capabilities for neural interfaces is illustrated. It is emphasized that the technological challenges are similar for all alternative types of materials used in the engineering of neural interface devices, each offering a unique set of advantages and limitations. Graphene and 2D materials can indeed play a commanding role in the efforts toward wider clinical adoption of bioelectronics and electroceuticals.

show abstract

Section: Graphene Materials For Next‐generation Neural Interfacesmentioning

confidence: 99%

Graphene in the Design and Engineering of Next‐Generation Neural Interfaces

et al. 2017

View full text Add to dashboard Cite

show abstract

“…[7] Graphene has outstanding properties, including good (electro)chemical stability, high theoretical specific surface area (2630 m 2 g À 1 ), [8] and excellent electrical conductivity. [9] There are several ways to prepare graphene films, including spray coating, [10] blade-casting, [11] Langmuir-Blodgett assembly, [12] chemical vapor deposition, [13,14] evaporation of water, [15] and vacuum-assisted filtration. [16][17][18] Among these methods, the vacuum-assisted filtration method is a facile and straightforward technique to obtain self-standing graphene films.…”

Section: Introductionmentioning

confidence: 99%

Free‐Standing N‐doped Reduced Graphene Oxide Papers Decorated with Iron Oxide Nanoparticles: Stable Supercapacitor Electrodes

et al. 2019

View full text Add to dashboard Cite

In this study, graphene oxide paper is obtained via vacuumassisted filtration of graphene oxide solution to prepare selfstanding electrodes for supercapacitors. Simultaneous reduction and N-doping of graphene oxide paper are performed by chemical reduction followed by thermal annealing. Influence of different reduction techniques on the electrochemical properties of the self-standing papers is investigated. N-doped reduced graphene oxide papers are decorated with iron oxide nanoparticles to increase the energy density of the material. Increasing the amount of iron oxide nanoparticles in the composite paper results in enhanced capacitance. In the galvanostatic charge-discharge measurements, iron oxide/Ndoped reduced graphene oxide electrode exhibits specific capacitance of 203 F g À 1 at 0.5 mA cm À 2 . This value is remarkable since the electrode has a high mass loading of 2 mg cm À 2 , which shows that the electrode can be used for practical purposes. Moreover, these electrodes operate in a wide potential window (1.6 V) and exhibit 79 % capacitance retention at 10000 cycles.

show abstract

“…In addition, as shown in Fig. 4(h) the surface roughness of the Hy-RGO LS films was estimated to be about 30.5 nm from the AFM topography, which is much less than the value reported in the literature (about 84.7 nm) for an LS film of RGO prepared from a methanol suspension 34 . This reduced surface roughness can be attributed to the stabilization of RGO sheets by the DMF that was used as the solvent in the current study.…”

Section: Resultsmentioning

confidence: 54%

Highly sensitive ammonia sensor for diagnostic purpose using reduced graphene oxide and conductive polymer

Park

2018

Sci Rep

View full text Add to dashboard Cite

In this study, we fabricate ammonia sensors based on hybrid thin films of reduced graphene oxide (RGO) and conducting polymers using the Langmuir-Schaefer (LS) technique. The RGO is first prepared using hydrazine (Hy) and/or pyrrole (Py) as the reducing agents, and the resulting pyrrole-reduced RGO (Py-RGO) is then hybridized with polyaniline (PANI) and/or polypyrrole (PPy) by in-situ polymerization. The four different thin films of Hy-RGO, Py-RGO, Py-RGO/PANI, and Py-RGO/PPy are deposited on interdigitated microelectrodes by the LS techniques, and their structures are characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The results of ammonia sensing experiments indicate that the Py-RGO/PANI film exhibits the highest sensor response of these four films, and that it exhibits high reproducibility, high linearity of concentration dependency, and a very low detection limit (0.2 ppm) both in N2 and exhaled air environments. The current gas sensor, therefore, has potential for diagnostic purposes because it has the additional advantages of facile fabrication, ease of use at room temperature, and portability compared to conventional high-sensitivity ammonia sensors.

show abstract

Preparation of a Three-Dimensional Reduced Graphene Oxide Film by Using the Langmuir–Blodgett Method

Cited by 39 publications

References 52 publications

Graphene in the Design and Engineering of Next‐Generation Neural Interfaces

Graphene in the Design and Engineering of Next‐Generation Neural Interfaces

Free‐Standing N‐doped Reduced Graphene Oxide Papers Decorated with Iron Oxide Nanoparticles: Stable Supercapacitor Electrodes

Highly sensitive ammonia sensor for diagnostic purpose using reduced graphene oxide and conductive polymer

Contact Info

Product

Resources

About