Recent progress in organic molecule/graphene interfaces

Guo, Hong; Wu, Qi‐Hui; Ren, Jianguo; Wang, Chundong; Zhang, Wenjun; Lee, Shuit‐Tong

doi:10.1016/j.nantod.2013.07.003

Cited by 77 publications

(72 citation statements)

References 98 publications

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“…It exhibits a number of intriguing properties including a perfect two-dimensional nanostructure, excellent electronic conductivity, high surface area (theoretical value 2600 m 2 g -1 ), and wide electrochemical window. [17][18][19][20] It was recently reported that SnO 2 /graphene nanostructures may not only provide an effective volume buffer but also prevent the Sn nanoparticle from aggregation. [21][22][23][24] However, the synthesis of high performance anode materials of nanostructured SnO 2 /graphene remains challenging.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of cambered nano-walls of SnO₂/rGO composites using a recyclable melamine template for lithium-ion batteries

et al. 2015

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Graphene and graphene/metal oxide composite materials have attracted considerable interest for energy materials due to their excellent electrochemical performances. Here we propose using melamine as a template for the synthesis of cambered nano-walls of SnO2/rGO materials. Melamine powder can effectively absorb SnO2/GO from the solution to form a core-shell structure of melamine@SnO2/GO. After thermal reduction of GO at 200 o C to form the melamine@SnO2/rGO, melamine was dissolved in hot water at 80 o C, leaving behind the cambered SnO2/rGO nano-walls. Melamine is recyclable since it precipitates when its solution cools to room temperature. The thickness of the SnO2/rGO nano-walls can be easily controlled by adjusting the mass ratio of melamine to SnO2/GO. When the mass ratio was set to ten, cambered walls of SnO2/rGO with thickness of about 100-200 nm were achieved. The resulting SnO2/rGO delivered an initial reversible capacity of at 998 mAh/g at a current density of 100 mA/g and a capacity of 855 mAh/g after 100 discharge-charge cycles in a potential range between 0.02 and 3.0 V vs. Li/Li + . It also showed good rate performance with a reversible capacity of 460 mAh/g at 1A/g. These high capacities can be linked to the special cambered nano-walls which ensure fast solid diffusion in addition to providing an effective liquid-channel and buffer-volume in the electrode. The proposed synthesis method is easily scalable and should be applicable to many other graphene based energy materials.

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Section: Introductionmentioning

confidence: 99%

Synthesis of cambered nano-walls of SnO₂/rGO composites using a recyclable melamine template for lithium-ion batteries

et al. 2015

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“…polymer residue) is experimentally unavoidable, which seriously hinders investigations. On the other hand, chemical doping has been 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 3 comprehensively developed in the past years [18][19][20] , but the exposed graphene surface is normally occupied by the introduced heteroatoms, affecting the wetting property.…”

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confidence: 99%

On the Mechanism of Hydrophilicity of Graphene

et al. 2016

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It is generally accepted that the hydrophilic property of graphene can be affected by the underlying substrate. However, the role of intrinsic vs substrate contributions and the related mechanisms are vividly debated. Here, we show that the intrinsic hydrophilicity of graphene can be intimately connected to the position of its Fermi level, which affects the interaction between graphene and water molecules. The underlying substrate, or dopants, can tune hydrophilicity by modulating the Fermi level of graphene. By shifting the Fermi level of graphene away from its Dirac point, via either chemical or electrical voltage doping, we show enhanced hydrophilicity with experiments and first principle simulations. Increased vapor condensation on graphene, induced by a simple shifting of its Fermi level, exemplifies applications in the area of interfacial transport phenomena.

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“…[20,21] Metal, metal oxide, and semiconductor nanocrystals have been shown to selfassemble into ordered structures upon evaporation of the solvent on a solid substrate or on a water-air interface. [22][23][24][25][26][27] Most of the nanocrystal superlattices reported so far have ordered domain sizes about a few hundred nanometers by the first method. However, periodicity with long-range ordering is hard to achieve experimentally not only because of the intrinsic particle size distribution but also because of the dewetting of the solvent during the self-assembly process.…”

Section: Resultsmentioning

confidence: 99%

Formation of Au nanocluster ordered array on Si(111)‐7 × 7 surface

et al. 2015

Surface & Interface Analysis

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We report a successful approach in fabricating well shape two‐dimensional Au nanocluster hexagonal array on an Si(111)‐7 × 7 surface. The size of Au hexagons is about 2.5 × 2.5 nm2. The easiness of preparing large scale Au hexagonal array makes this approach usable to fabricate a wide range of other metal nanocluster arrays. Further deposition of small amount of Au nanoclusters on the Au hexagonal array surface will prefer to occupy the holes of the hexagonal array at room temperature. Finally, a reasonable structure of formatting the hexagonal Au nanocluster array on the Si(111)‐7 × 7 surface was proposed. Copyright © 2015 John Wiley & Sons, Ltd.

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Recent progress in organic molecule/graphene interfaces

Cited by 77 publications

References 98 publications

Synthesis of cambered nano-walls of SnO₂/rGO composites using a recyclable melamine template for lithium-ion batteries

Synthesis of cambered nano-walls of SnO₂/rGO composites using a recyclable melamine template for lithium-ion batteries

On the Mechanism of Hydrophilicity of Graphene

Formation of Au nanocluster ordered array on Si(111)‐7 × 7 surface

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Recent progress in organic molecule/graphene interfaces

Cited by 77 publications

References 98 publications

Synthesis of cambered nano-walls of SnO2/rGO composites using a recyclable melamine template for lithium-ion batteries

Synthesis of cambered nano-walls of SnO2/rGO composites using a recyclable melamine template for lithium-ion batteries

On the Mechanism of Hydrophilicity of Graphene

Formation of Au nanocluster ordered array on Si(111)‐7 × 7 surface

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Synthesis of cambered nano-walls of SnO₂/rGO composites using a recyclable melamine template for lithium-ion batteries

Synthesis of cambered nano-walls of SnO₂/rGO composites using a recyclable melamine template for lithium-ion batteries