Induction of the surface plasmon resonance from C-incorporated Au catalyst in Si 1-xC x nanowires

Woo Jung Lee, Jin Won Ma, Jung Min Bae, Sang Han Park, Kwang Sik Jeong, Mann Ho Cho, Chul Lee, Kyong Joo Han, Kwun Bum Jeong

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Si 1-xC x nanowires (NWs) were synthesized by varying the ratio of SiH 4 and CH 3SiH 3 gases using a vapor-liquid-solid (VLS) procedure using Au as a catalyst. The growth rate of the Si 1-xC x NWs and the change in the wire shape from straight to helical near the Au tip were found to be closely related to the ratio of the CH 3SiH 3 content. The large concentration of C in the Si 1-xC x NWs was proportional to the CH 3SiH 3 content, overcoming the extremely low solubility of C in Si, resulting in an interstitial incorporation of C atoms in the wire. This incorporation can be attributed to the cleavage of Si-C bonds in the CH 3SiH 3 compound through the Au catalyst (an Au-Si liquid-state cluster of about 70-100 nm) during wire growth by the VLS method. Simultaneously supplying CH 3SiH 3 and SiH 4 gases enhanced the diffusion of Au atoms from the tip to the sidewall of the wire, while also deforming the shape of the Au tip. When the CH 3SiH 3 gas was increased to 1.5 sccm, the number of Au nanoparticles (2-3 nm in size) at the lateral surface induced a surface plasmon resonance (SPR) and improved the optical conductivity (σ) of the Si 1-xC x NWs. For 2 sccm of CH 3SiH 3, a remarkable increase in the number of C atoms incorporated in the Au nanoparticles along the sidewall red shifted the SPR peak, suggesting that the SPR can be modulated by the Au-C interactions in the nanoparticles.

Original languageEnglish
Pages (from-to)19744-19751
Number of pages8
JournalJournal of Materials Chemistry
Volume22
Issue number37
DOIs
Publication statusPublished - 2012 Oct 7

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Surface plasmon resonance
Nanowires
Wire
Catalysts
Gases
Nanoparticles
Atoms
Liquids
Vapors
Optical conductivity
Solubility

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

Lee, Woo Jung ; Ma, Jin Won ; Bae, Jung Min ; Park, Sang Han ; Jeong, Kwang Sik ; Cho, Mann Ho ; Lee, Chul ; Han, Kyong Joo ; Jeong, Kwun Bum. / Induction of the surface plasmon resonance from C-incorporated Au catalyst in Si 1-xC x nanowires. In: Journal of Materials Chemistry. 2012 ; Vol. 22, No. 37. pp. 19744-19751.
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title = "Induction of the surface plasmon resonance from C-incorporated Au catalyst in Si 1-xC x nanowires",
abstract = "Si 1-xC x nanowires (NWs) were synthesized by varying the ratio of SiH 4 and CH 3SiH 3 gases using a vapor-liquid-solid (VLS) procedure using Au as a catalyst. The growth rate of the Si 1-xC x NWs and the change in the wire shape from straight to helical near the Au tip were found to be closely related to the ratio of the CH 3SiH 3 content. The large concentration of C in the Si 1-xC x NWs was proportional to the CH 3SiH 3 content, overcoming the extremely low solubility of C in Si, resulting in an interstitial incorporation of C atoms in the wire. This incorporation can be attributed to the cleavage of Si-C bonds in the CH 3SiH 3 compound through the Au catalyst (an Au-Si liquid-state cluster of about 70-100 nm) during wire growth by the VLS method. Simultaneously supplying CH 3SiH 3 and SiH 4 gases enhanced the diffusion of Au atoms from the tip to the sidewall of the wire, while also deforming the shape of the Au tip. When the CH 3SiH 3 gas was increased to 1.5 sccm, the number of Au nanoparticles (2-3 nm in size) at the lateral surface induced a surface plasmon resonance (SPR) and improved the optical conductivity (σ) of the Si 1-xC x NWs. For 2 sccm of CH 3SiH 3, a remarkable increase in the number of C atoms incorporated in the Au nanoparticles along the sidewall red shifted the SPR peak, suggesting that the SPR can be modulated by the Au-C interactions in the nanoparticles.",
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Lee, WJ, Ma, JW, Bae, JM, Park, SH, Jeong, KS, Cho, MH, Lee, C, Han, KJ & Jeong, KB 2012, 'Induction of the surface plasmon resonance from C-incorporated Au catalyst in Si 1-xC x nanowires', Journal of Materials Chemistry, vol. 22, no. 37, pp. 19744-19751. https://doi.org/10.1039/c2jm33527a

Induction of the surface plasmon resonance from C-incorporated Au catalyst in Si 1-xC x nanowires. / Lee, Woo Jung; Ma, Jin Won; Bae, Jung Min; Park, Sang Han; Jeong, Kwang Sik; Cho, Mann Ho; Lee, Chul; Han, Kyong Joo; Jeong, Kwun Bum.

In: Journal of Materials Chemistry, Vol. 22, No. 37, 07.10.2012, p. 19744-19751.

Research output: Contribution to journalArticle

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T1 - Induction of the surface plasmon resonance from C-incorporated Au catalyst in Si 1-xC x nanowires

AU - Lee, Woo Jung

AU - Ma, Jin Won

AU - Bae, Jung Min

AU - Park, Sang Han

AU - Jeong, Kwang Sik

AU - Cho, Mann Ho

AU - Lee, Chul

AU - Han, Kyong Joo

AU - Jeong, Kwun Bum

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Y1 - 2012/10/7

N2 - Si 1-xC x nanowires (NWs) were synthesized by varying the ratio of SiH 4 and CH 3SiH 3 gases using a vapor-liquid-solid (VLS) procedure using Au as a catalyst. The growth rate of the Si 1-xC x NWs and the change in the wire shape from straight to helical near the Au tip were found to be closely related to the ratio of the CH 3SiH 3 content. The large concentration of C in the Si 1-xC x NWs was proportional to the CH 3SiH 3 content, overcoming the extremely low solubility of C in Si, resulting in an interstitial incorporation of C atoms in the wire. This incorporation can be attributed to the cleavage of Si-C bonds in the CH 3SiH 3 compound through the Au catalyst (an Au-Si liquid-state cluster of about 70-100 nm) during wire growth by the VLS method. Simultaneously supplying CH 3SiH 3 and SiH 4 gases enhanced the diffusion of Au atoms from the tip to the sidewall of the wire, while also deforming the shape of the Au tip. When the CH 3SiH 3 gas was increased to 1.5 sccm, the number of Au nanoparticles (2-3 nm in size) at the lateral surface induced a surface plasmon resonance (SPR) and improved the optical conductivity (σ) of the Si 1-xC x NWs. For 2 sccm of CH 3SiH 3, a remarkable increase in the number of C atoms incorporated in the Au nanoparticles along the sidewall red shifted the SPR peak, suggesting that the SPR can be modulated by the Au-C interactions in the nanoparticles.

AB - Si 1-xC x nanowires (NWs) were synthesized by varying the ratio of SiH 4 and CH 3SiH 3 gases using a vapor-liquid-solid (VLS) procedure using Au as a catalyst. The growth rate of the Si 1-xC x NWs and the change in the wire shape from straight to helical near the Au tip were found to be closely related to the ratio of the CH 3SiH 3 content. The large concentration of C in the Si 1-xC x NWs was proportional to the CH 3SiH 3 content, overcoming the extremely low solubility of C in Si, resulting in an interstitial incorporation of C atoms in the wire. This incorporation can be attributed to the cleavage of Si-C bonds in the CH 3SiH 3 compound through the Au catalyst (an Au-Si liquid-state cluster of about 70-100 nm) during wire growth by the VLS method. Simultaneously supplying CH 3SiH 3 and SiH 4 gases enhanced the diffusion of Au atoms from the tip to the sidewall of the wire, while also deforming the shape of the Au tip. When the CH 3SiH 3 gas was increased to 1.5 sccm, the number of Au nanoparticles (2-3 nm in size) at the lateral surface induced a surface plasmon resonance (SPR) and improved the optical conductivity (σ) of the Si 1-xC x NWs. For 2 sccm of CH 3SiH 3, a remarkable increase in the number of C atoms incorporated in the Au nanoparticles along the sidewall red shifted the SPR peak, suggesting that the SPR can be modulated by the Au-C interactions in the nanoparticles.

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