Multiband photoluminescence from carbon nanoflakes synthesized by hot filament CVD: towards solid-state white light sources

Wang, B. B.; Ostrikov, Kostya Ken; Zheng, Kun; Wang, L.; Zou, S. S.

doi:10.1039/c3tc32568g

Cited by 25 publications

(28 citation statements)

References 52 publications

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“…However, if the concentration of CH 4 is high, the VCNFs can also be formed without plasmas . It is related to the formation of sp 2 carbon species through the interaction among hydrocarbon chemicals formed by hot filament with a high temperature (∼2000 °C) . Based on the above analysis, and consistent with the previous results we propose that the formation rate of carbon precursors is an important step for the growth of VCNFs.…”

Section: Resultssupporting

confidence: 88%

“…Due to a low concentration of CH 4 , the formation probability of hydrocarbon ions including C 2 is low, and thus the CH 3 + with sp 3 configuration is used to form diamond. However, if the concentration of CH 4 is high, the VCNFs can also be formed without plasmas . It is related to the formation of sp 2 carbon species through the interaction among hydrocarbon chemicals formed by hot filament with a high temperature (∼2000 °C) .…”

Section: Resultsmentioning

confidence: 99%

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Plasma‐Produced Vertical Carbonous Nanoflakes for Li‐Ion Batteries

Shao

Wang

et al. 2016

Plasma Processes & Polymers

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An effective method to produce vertically-oriented carbonous nanoflakes (VCNFs) on copper foils using an advanced custom-designed plasma-enhanced horizontal tube furnace deposition system under different RF powers at 850 8C without using any binder or catalyst materials is demonstrated. The morphology and structure of the synthesized carbonous materials are investigated using Raman spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy. It is shown that the VCNFs can be effectively synthesized at moderate RF powers. When the RF power is 660 W, VCNFs which are only 2 atomic carbon layers thin, can be grown. The thickness and level of structural defects in the VCNFs can also be controlled by changing the RF power. A plausible growth mechanism for VCNFs under the plasma conditions is proposed. The synthesized VCNFs are applied as a cathode material for Li-ion batteries. The coin-type batteries demonstrate stable efficiency ($99%) and specific capacity (110 mAh g À1 ) over 100 charge-discharge cycles.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Plasma‐Produced Vertical Carbonous Nanoflakes for Li‐Ion Batteries

Shao

Wang

et al. 2016

Plasma Processes & Polymers

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“…The CNFs were synthesized in a HFCVD system, which has been described in detail elsewhere. 16 The CVD chamber is depicted in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

Structure and photoluminescence of boron-doped carbon nanoflakes grown by hot filament chemical vapour deposition

et al. 2015

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“…To investigate the role of effective polarizability of Au NPs in hybrid system, vibrational properties of C 0 , C 1 and C 2 are probed by the Raman spectra and depicted in figure 2a. The typical Raman spectra consist of prominent intensities for D, G, and G bands and these phonon modes are considered as the main characteristic feature of VG [19,29]. The presence of G and G bands in the spectra (figure 2a) confirm the existence of graphitic structure.…”

Section: Polarizability Dependent Raman Studiesmentioning

confidence: 98%

“…The presence of optical band gap may induce the emission properties in VG. Thus, VG itself a promising material for white light emission [19].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopically forbidden infra-red emission in Au-vertical graphene hybrid nanostructures

et al. 2017

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Implementation of Au nanoparticles (NPs) is a subject for frontier plasmonic research due to its fascinating optical properties. Herein, the present study deals with plasmonic assisted emission properties of Au NPs-vertical graphene (VG) hybrid nanostructures. The influence of effective polarizability of Au NPs on the surface enhanced Raman scattering and luminescence properties is investigated. In addition, a remarkable infra-red emission in the hybrid nanostructures is observed and interpreted on the basis of intra-band transitions in Au NPs. The flake-like nanoporous VG structure is invoked for the generation of additional confined photons to impart additional momentum and a gradient of confined excitation energy towards initiating the intra-band transitions of Au NPs. Integrating Au plasmonic materials in three-dimensional VG nanostructures enhances the light-matter interactions. The present study provides a new adaptable plasmonic assisted pathway for optoelectronic and sensing applications.

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Multiband photoluminescence from carbon nanoflakes synthesized by hot filament CVD: towards solid-state white light sources

Abstract: Carbon nanoflakes (CNFLs) are synthesized on silicon substrates deposited with carbon islands in a methane environment using hot filament chemical vapor deposition.

Cited by 25 publications

References 52 publications

Plasma‐Produced Vertical Carbonous Nanoflakes for Li‐Ion Batteries

Plasma‐Produced Vertical Carbonous Nanoflakes for Li‐Ion Batteries

Structure and photoluminescence of boron-doped carbon nanoflakes grown by hot filament chemical vapour deposition

Spectroscopically forbidden infra-red emission in Au-vertical graphene hybrid nanostructures

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