In situ monitoring of carbon nanotube growth

Kim, Do-Hyung; Jang, Hee‐Seong; Kim, Chang-Duk; Cho, Dong-Soo; Kang, Hee-Dong; Jee, Jong-Gi; Lee, Hyeong-Rag

doi:10.1016/s0008-6223(02)00350-0

Cited by 14 publications

(8 citation statements)

References 3 publications

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“…In accordance with their statement, Roman and Somenath [108] showed that the mean diameter of MWCNTs increase with the CVD durations, possibly due to sintering and agglomeration of particles. Furthermore, CNTs length is controlled by the length of the deposition time [7,47,109]. Qian et al [75] concluded that CNTs sampled at different periods have different thermal stability, i.e., the initially grown CNTs have a low thermal stability and serious defects as compared to the fully grown tubes.…”

Section: Time and Space Velocitymentioning

confidence: 99%

Fluidized bed catalytic chemical vapor deposition synthesis of carbon nanotubes—A review

Danafar

Fakhru’l‐Razi

Salleh

et al. 2009

Chemical Engineering Journal

170

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a b s t r a c tCarbon nanotubes (CNTs) are pure carbon in nanostructures with unique physico-chemical properties. They have brought significant breakthroughs in different fields such as materials, electronic devices, energy storage, separation, sensors, etc. If the CNTs are ever to fulfill their promise as an engineering material, commercial production will be required. Catalytic chemical vapor deposition (CCVD) technique coupled with a suitable reactor is considered as a scalable and relatively low-cost process enabling to produce high yield CNTs. Recent advances on CCVD of CNTs have shown that fluidized-bed reactors have a great potential for commercial production of this valuable material. However, the dominating process parameters which impact upon the CNT nucleation and growth need to be understood to control product morphology, optimize process productivity and scale up the process. This paper discusses a general overview of the key parameters in the CVD formation of CNT. The focus will be then shifted to the fluidized bed reactors as an alternative for commercial production of CNTs.

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Section: Time and Space Velocitymentioning

confidence: 99%

Fluidized bed catalytic chemical vapor deposition synthesis of carbon nanotubes—A review

Danafar

Fakhru’l‐Razi

Salleh

et al. 2009

Chemical Engineering Journal

170

View full text Add to dashboard Cite

show abstract

“…Outras estratégias para estudo da formação de NTC são a medida de corrente elétrica entre eletrodos para controlar a quantidade de NTC formados, 6 a aplicação de uma sonda TEOM (Tapered Element Oscillating Microbalance), 7 análise dos produtos gasosos da reação através de um sistema GC/MS 8 e, o uso da técnica de interferência ótica. [9][10][11] Neste trabalho, é proposto o uso da técnica de redução à temperatura programada (RTP) para o monitoramento do crescimento de nanotubos de carbono por CVD. Um experimento típico de RTP monitora o consumo de H 2 durante a redução de uma amostra sob fluxo de gás redutor (usualmente H 2 ) diluído em gás inerte (N 2 ou Ar), enquanto a temperatura é aumentada linearmente com o tempo.…”

Section: Introductionunclassified

Sistema RTP: uma técnica poderosa para o monitoramento da formação de nanotubos de carbono durante o processo por deposição de vapor químico

Tristão¹,

Moura²,

Lago³

et al. 2010

Quím. Nova

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“…The CNTs growth was performed at 600°C and monitored using an in situ optical interference system [33,34]. It consists of a focused 650 nm laser diode with 1 mm beam diameter and a photodetector.…”

Section: Methodsmentioning

confidence: 99%

“…It consists of a focused 650 nm laser diode with 1 mm beam diameter and a photodetector. The growth experiments and measurements were automatically controlled by a personal computer with an in-house prepared software [34]. The SEM and TEM images of the grown CNT samples were performed using a FE-SEM 4300 and Hitachi 9000 system, respectively.…”

Section: Methodsmentioning

confidence: 99%