Projects per year
Abstract
Floating-catalyst CVD (FCCVD) is a highly promising technique for the scalable synthesis of single-walled carbon nanotubes (SWCNTs). The number concentration (NC) of catalyst particles is one of the process parameters which mainly influences yield of as-produced SWCNTs. In the conventional FCCVD methods, catalyst particles are usually synthesized by thermal decomposition of organometallic compounds inside the FCCVD reactor. Being in-situ catalyst formation in conventional FCCVD, it is an open question that how many SWCNTs a single catalyst particle can grow? Herein, we employed our novel spark discharged based FCCVD technique which decouples the formation of catalyst particles and SWCNTs synthesis into two subsequent process to investigate effects of catalyst NC on SWCNTs synthesis. The NC of both catalyst particles and SWCNTs in gas-phase were quantitatively compared using differential mobility analyzer (DMA). The DMA measurements corroborated with atomic force microscopy and X-rays photoelectron spectroscopy revealed that under carefully chosen reaction conditions in FCCVD, a single catalyst particle can grow more than one SWCNTs. We propose that after the growth of 1st SWCNT, the catalyst particle detach itself to start nucleating 2nd SWCNT and this process continues as long as the catalyst remains in the growth region of the FCCVD reactor.
Original language | English |
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Article number | 140185 |
Pages (from-to) | 1-7 |
Number of pages | 7 |
Journal | Chemical Physics Letters |
Volume | 810 |
DOIs | |
Publication status | Published - Jan 2023 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Single walled carbon nanotubes
- Spark discharge
Fingerprint
Dive into the research topics of 'Multi-nucleation of single-walled carbon nanotubes in floating catalyst chemical vapor deposition'. Together they form a unique fingerprint.Projects
- 5 Finished
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CNTstress: Using Carbon Nanotube Materials to Improve the Stress Grading System of an Electrical Machine
Kauppinen, E. (Principal investigator), Ahmad, S. (Project Member), Zhang, Q. (Project Member), Tavakkoli, M. (Project Member) & Khan, M. (Project Member)
01/09/2018 → 31/08/2022
Project: Academy of Finland: Other research funding
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FEDOC: Fast electrochemical detection of opioids in blood sample by carbon nano hybrid electrodes
Koskinen, J. (Principal investigator), Wester, N. (Project Member), Durairaj, V. (Project Member), Johansson, L.-S. (Project Member) & Etula, J. (Project Member)
01/06/2016 → 31/12/2018
Project: Business Finland: Other research funding
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CNT-PV: Carbon nanotube hole-transporting and collecting layers for semi-transparent, flexible and low-cost solid-state photovoltaic cells
Zhang, Q. (Project Member), Kauppinen, E. (Principal investigator) & Wei, N. (Project Member)
01/01/2016 → 31/12/2017
Project: Business Finland: Other research funding
Equipment
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OtaNano - Nanomicroscopy Center
Seitsonen, J. (Manager) & Rissanen, A. (Other)
OtaNanoFacility/equipment: Facility