Journal ArticleDOI
Field Emission from a Composite of Graphene Sheets and ZnO Nanowires
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TLDR
In this article, a base growth mechanism using plasma-enhanced chemical vapor deposition was used to grow pyramid-like graphene sheets on Ni-coated ZnO nanowires via a "base growth" mechanism.Abstract:
There is a problem with field emission from graphene sheets (GSs) because existing deposition methods lead to sheets that have planar morphological features along entire substrates, which limits field enhancement. To overcome this problem, here we grow pyramid-like GSs on Ni-coated ZnO nanowires via a “base growth” mechanism using plasma-enhanced chemical vapor deposition. The surface morphologies of ZnO−GSs can be controlled by the density of the Ni nanoparticles and deposition time. The ZnO−GSs has a lower turn-on field, 1.3 V/μm, compared to that, 2.5 V/μm, of pure ZnO at a current density of 1 μA/cm2, implying avenues for potential applications of graphene and ZnO.read more
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Graphene-Based Nanoarchitectures. Anchoring Semiconductor and Metal Nanoparticles on a Two-Dimensional Carbon Support
TL;DR: In this article, reduced graphene oxide is used as a support to anchor semiconductor and metal nanoparticles and discussed potential applications in catalysis, light energy conversion, and fuel cells.
Journal ArticleDOI
Functional Composite Materials Based on Chemically Converted Graphene
Hua Bai,Chun Li,Gaoquan Shi +2 more
TL;DR: In this progress report, the recent advancements in the studies of the composites of CCG and small molecules, polymers, inorganic nanoparticles or other carbon nanomaterials are reviewed.
Journal ArticleDOI
Graphene-based materials for catalysis
TL;DR: Graphene is one of the most promising materials in nanotechnology and from a theoretical point of view, it provides the ultimate two-dimensional model of a catalytic support as mentioned in this paper, and some promising results have already been obtained with few-layer graphene.
Journal ArticleDOI
ZnO@graphene composite with enhanced performance for the removal of dye from water
Baojun Li,Huaqiang Cao +1 more
TL;DR: In this article, a ZnO@graphene composite exhibits enhanced performance for photocatalytic degradation and filtered removal of RhB dye, in comparison with ZnOs and graphene, highlighting its potential applications for a variety of environmental issues.
Journal ArticleDOI
Reduced graphene oxide-metal/metal oxide composites: facile synthesis and application in water purification.
TL;DR: A methodology was developed to immobilize RGO-composites on river sand (RS) using chitosan as the binder and the as-supported composites are found to be efficient adsorbent candidates for field application.
References
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Journal ArticleDOI
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Andrea C. Ferrari,Jannik C. Meyer,Vittorio Scardaci,Cinzia Casiraghi,Michele Lazzeri,Francesco Mauri,S. Piscanec,Da Jiang,K. S. Novoselov,S. Roth,A. K. Geim +10 more
TL;DR: This work shows that graphene's electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers, and allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research area.
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Catalytic Growth of Zinc Oxide Nanowires by Vapor Transport
TL;DR: In this paper, the capacitance matrix was calculated for different chain lengths using the software package FastCap MIT (1992) and a ligand shell dielectric constant of 3.14 aF.
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Green luminescent center in undoped zinc oxide films deposited on silicon substrates
Bixia Lin,Zhuxi Fu,Yunbo Jia +2 more
TL;DR: The photoluminescence (PL) spectra of undoped ZnO films deposited on Si substrates by dc reactive sputtering have been studied in this paper, where two emission peaks, centered at 3.18 eV and 2.38 eV, were found to correspond to oxide antisite defect OZn rather than oxygen vacancy VO, zinc vacancy VZn, interstitial zinc Zni, and interstitial oxygen Oi.
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Atomic-scale imaging of carbon nanofibre growth
Stig Helveg,Carlos López-Cartes,Carlos López-Cartes,Jens Sehested,Poul L. Hansen,Clausen Bjerne Steffen,Jens R. Rostrup-Nielsen,Frank Abild-Pedersen,Jens K. Nørskov +8 more
TL;DR: Time-resolved, high-resolution in situ transmission electron microscope observations of the formation of carbon nanofibres from methane decomposition over supported nickel nanocrystals show that metallic step edges act as spatiotemporal dynamic growth sites and may be important for understanding other types of catalytic reactions and nanomaterial syntheses.
Journal ArticleDOI
Field emission from well-aligned zinc oxide nanowires grown at low temperature
TL;DR: In this paper, a field electron emission from vertically well-aligned zinc oxide (ZnO) nanowires, which were grown by the vapor deposition method at a low temperature of 550 °C, was investigated.