Characteristics of graphene FET directly transformed from a resist pattern through interfacial graphitization of liquid gallium

Fujita, Jun–ichi; Ueki, Ryuichi; Nishijima, Takuya; Miyazawa, Yosuke

doi:10.1016/j.mee.2011.01.014

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…19,20) We have demonstrated that liquid gallium can catalyze the amorphous carbon at the interfacial region. [21][22][23][24][25][26] Graphene nanoribbons were transformed from amorphous carbon templates of amyloid fibrils by solid-phase graphitization within the gallium vapor ambient. 21) Moreover, a large area of graphene can be formed using methane CVD combined with gallium vapor.…”

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confidence: 99%

Low-temperature growth of graphene using interfacial catalysis of molten gallium and diluted methane chemical vapor deposition

Hiyama

Murakami

Kuwajima

et al. 2015

Appl. Phys. Express

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Although the formation of graphene nuclei conventionally requires high temperature of ∼1050 °C in the first growth stage, the presence of the graphene nuclei allowed for low-temperature edge growth, and this peripheral area continued growing even when the temperature was reduced to 300 °C in the second growth stage. The graphene grown at the second stage was a single layer with fewer defects. The Raman map showed high homogeneity with a 2D/G ratio >2 over the entire contact area of molten gallium, and the hole mobility was 600 cm2 V−1 s−1.

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mentioning

confidence: 99%

Low-temperature growth of graphene using interfacial catalysis of molten gallium and diluted methane chemical vapor deposition

Hiyama

Murakami

Kuwajima

et al. 2015

Appl. Phys. Express

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“…Additionally, Ga may even produce a “catalytic” effect in preserving and reconstructing the sp 2 structure of graphene. It has been shown that liquid gallium is a good catalyst for graphene synthesis at the liquid–solid interface. − For example, direct contact of amorphous carbon with liquid gallium has been shown to produce graphene at the interface…”

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Demonstrating the Capability of the High-Performance Plasmonic Gallium–Graphene Couple

Losurdo

Suvorova

et al. 2014

ACS Nano

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Metal nanoparticle (NP)-graphene multifunctional platforms are of great interest for exploring strong light-graphene interactions enhanced by plasmons and for improving performance of numerous applications, such as sensing and catalysis. These platforms can also be used to carry out fundamental studies on charge transfer, and the findings can lead to new strategies for doping graphene. There have been a large number of studies on noble metal Au-graphene and Ag-graphene platforms that have shown their potential for a number of applications. These studies have also highlighted some drawbacks that must be overcome to realize high performance. Here we demonstrate the promise of plasmonic gallium (Ga) nanoparticle (NP)-graphene hybrids as a means of modulating the graphene Fermi level, creating tunable localized surface plasmon resonances and, consequently, creating high-performance surface-enhanced Raman scattering (SERS) platforms. Four prominent peculiarities of Ga, differentiating it from the commonly used noble (gold and silver) metals are (1) the ability to create tunable (from the UV to the visible) plasmonic platforms, (2) its chemical stability leading to long-lifetime plasmonic platforms, (3) its ability to n-type dope graphene, and (4) its weak chemical interaction with graphene, which preserves the integrity of the graphene lattice. As a result of these factors, a Ga NP-enhanced graphene Raman intensity effect has been observed. To further elucidate the roles of the electromagnetic enhancement (or plasmonic) mechanism in relation to electron transfer, we compare graphene-on-Ga NP and Ga NP-on-graphene SERS platforms using the cationic dye rhodamine B, a drug model biomolecule, as the analyte.

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“…Yet, the field‐effect sensing response, endorsed by the unique electrical structure of 2D graphene sheets, is highly restricted by their aggregation in bulk quantities and decreases dramatically when increasing the thickness from tens of nanometers to micrometers. [ 17 ] That is, the change in the electrical conductance of GO paper [ 18 ] only happens within its nanometer‐thick skin layer due to electrical screening effect, [ 19,20 ] resulting in negligible/undetectable conductance change of the macroscopic materials with hundreds of micrometer in thickness.…”

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confidence: 99%

Graphene Oxide/Hexylamine Superlattice Field‐Effect Biochemical Sensors

Huang

Yin

Huang

et al. 2021

Adv Funct Materials

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The bulky assembly of 2D materials is highly desired for macroscopic applications, but it is still challenging to access the exceptional properties of 2D materials owing to their spontaneous aggregation. Here, to facilitate the access of the field‐effect sensing abilities of semiconducting 2D materials in bulk quantities, 3D hybrid superlattices of alternating graphene oxide (GO) and hexylamine molecular layers are constructed. Strikingly, the fabricated flexible GO/hexylamine superlattice exhibits a “V”‐shaped ambipolar field‐effect transfer characteristic under electrolyte gating, with exceptional sensing ability to pH value and DNA molecules in buffer solutions. In contrast, GO paper prepared by annealing the hybrid superlattices exhibits neither field‐effect nor sensing responses to various analytes, highlighting the essential role that hexylamine plays in modulating the GO/hexylamine superlattice to enable a wider interlayer spacing for biomolecules transportation in the internal graphene layer. These achievements, along with stable electrical and sensing performance under mechanical stress of the 3D hybrid superlattices, highlight the unique potential of flexible graphene 3D hybrid superlattices for biochemical applications by overcoming multilayer aggregation.

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Characteristics of graphene FET directly transformed from a resist pattern through interfacial graphitization of liquid gallium

Cited by 9 publications

References 15 publications

Low-temperature growth of graphene using interfacial catalysis of molten gallium and diluted methane chemical vapor deposition

Low-temperature growth of graphene using interfacial catalysis of molten gallium and diluted methane chemical vapor deposition

Demonstrating the Capability of the High-Performance Plasmonic Gallium–Graphene Couple

Graphene Oxide/Hexylamine Superlattice Field‐Effect Biochemical Sensors

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