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- Publisher Website: 10.1142/S1793292009001563
- Scopus: eid_2-s2.0-68249154745
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Article: In situ formation of cobalt nanoclusters in sol-gel silica films for single-walled carbon nanotube growth
Title | In situ formation of cobalt nanoclusters in sol-gel silica films for single-walled carbon nanotube growth |
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Authors | |
Keywords | Sol-gel Thin film Co nanocluster Single-walled carbon nanotube |
Issue Date | 2009 |
Citation | Nano, 2009, v. 4, n. 2, p. 99-106 How to Cite? |
Abstract | A facile method was developed for in situ formation of Co nanoclusters in sol-gel silica thin films spin-coated on Si wafers. The size and density of Co nanoclusters can be controlled by spin-coating speeds, annealing methods, reduction temperatures under H , and metal precursor concentrations in tetraethylorthosilicate solutions. The optimized preparation condition, spin-coating speed of 9000 rpm, annealing at 500°C in air followed by reduction at 800°C in H , resulted in silica films as thin as 60 nm and Co nanoclusters with a mean diameter of 1.5 nm. Morphological and chemical characteristics of thin films and nanoclusters were studied by atomic force microscopy and X-ray photoelectron spectroscopy, respectively. Subsequently, these Co nanoclusters were successfully used to grow SWCNTs by CO decomposition. Film containing Co monometallic clusters produced SWCNTs of 1.3 nm in diameter, whereas film having Co/Mo bimetallic clusters produced SWCNTs of 0.9 nm. This sol-gel approach allowed not only easy catalyst patterning on a thin film but also a fine-tuning of SWCNT properties, e.g., diameter. © World Scientific Publishing Company. 2 2 |
Persistent Identifier | http://hdl.handle.net/10722/297965 |
ISSN | 2023 Impact Factor: 1.0 2023 SCImago Journal Rankings: 0.252 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Wei, Li | - |
dc.contributor.author | Wang, Bo | - |
dc.contributor.author | Liu, Dapeng | - |
dc.contributor.author | Li, Lain Jong | - |
dc.contributor.author | Yang, Yanhui | - |
dc.contributor.author | Chen, Yuan | - |
dc.date.accessioned | 2021-04-08T03:07:21Z | - |
dc.date.available | 2021-04-08T03:07:21Z | - |
dc.date.issued | 2009 | - |
dc.identifier.citation | Nano, 2009, v. 4, n. 2, p. 99-106 | - |
dc.identifier.issn | 1793-2920 | - |
dc.identifier.uri | http://hdl.handle.net/10722/297965 | - |
dc.description.abstract | A facile method was developed for in situ formation of Co nanoclusters in sol-gel silica thin films spin-coated on Si wafers. The size and density of Co nanoclusters can be controlled by spin-coating speeds, annealing methods, reduction temperatures under H , and metal precursor concentrations in tetraethylorthosilicate solutions. The optimized preparation condition, spin-coating speed of 9000 rpm, annealing at 500°C in air followed by reduction at 800°C in H , resulted in silica films as thin as 60 nm and Co nanoclusters with a mean diameter of 1.5 nm. Morphological and chemical characteristics of thin films and nanoclusters were studied by atomic force microscopy and X-ray photoelectron spectroscopy, respectively. Subsequently, these Co nanoclusters were successfully used to grow SWCNTs by CO decomposition. Film containing Co monometallic clusters produced SWCNTs of 1.3 nm in diameter, whereas film having Co/Mo bimetallic clusters produced SWCNTs of 0.9 nm. This sol-gel approach allowed not only easy catalyst patterning on a thin film but also a fine-tuning of SWCNT properties, e.g., diameter. © World Scientific Publishing Company. 2 2 | - |
dc.language | eng | - |
dc.relation.ispartof | Nano | - |
dc.subject | Sol-gel | - |
dc.subject | Thin film | - |
dc.subject | Co nanocluster | - |
dc.subject | Single-walled carbon nanotube | - |
dc.title | In situ formation of cobalt nanoclusters in sol-gel silica films for single-walled carbon nanotube growth | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1142/S1793292009001563 | - |
dc.identifier.scopus | eid_2-s2.0-68249154745 | - |
dc.identifier.volume | 4 | - |
dc.identifier.issue | 2 | - |
dc.identifier.spage | 99 | - |
dc.identifier.epage | 106 | - |
dc.identifier.isi | WOS:000268448400006 | - |
dc.identifier.issnl | 1793-2920 | - |