Silica xerogel films hybridized with carbon nanotubes by single step sol-gel processing

In Keun Jung; Jyoti L. Gurav; Uzma K.H. Bangi; Seungsu Baek; Hyung Ho Park

doi:10.1016/j.jnoncrysol.2011.11.009

Silica xerogel films hybridized with carbon nanotubes by single step sol-gel processing

In Keun Jung, Jyoti L. Gurav, Uzma K.H. Bangi, Seungsu Baek, Hyung Ho Park

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Synthesis of multi-walled carbon nanotubes (MWCNTs) doped silica xerogel films was reported in this work. A crucial step of introducing MWCNTs was achieved by functionalizing them by acid treatment to form stable and homogenous SiO ₂/MWCNTs sol. Scanning electron microscopy showed spherical particles in honeycomb network structure for undoped xerogel films whereas dispersion and wrapping of MWCNTs in silica matrix was observed for MWCNTs doped films. Various bond formations during the sol-gel process and surface modification were confirmed using Fourier transform infra-red and detailed study on the chemical bonding state of the films was carried out using X-ray photoelectron spectroscopy. Nanoindentation studies showed that the mechanical properties of MWCNTs doped xerogel film increase dramatically: higher modulus (E = 2.127 ± 0.095 GPa) and hardness (H = 0.035 ± 0.017 GPa) values than those of pristine xerogel film (E = 0.234 ± 0.058 GPa, H = 0.01 ± 0.003 GPa).

Original language	English
Pages (from-to)	550-556
Number of pages	7
Journal	Journal of Non-Crystalline Solids
Volume	358
Issue number	3
DOIs	https://doi.org/10.1016/j.jnoncrysol.2011.11.009
Publication status	Published - 2012 Feb 1

Bibliographical note

Funding Information:
The authors are grateful to Brain Korea 21 Phase II programme for the financial support for this work. We also thankful to Agency for Defense Development project for funding support.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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10.1016/j.jnoncrysol.2011.11.009

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title = "Silica xerogel films hybridized with carbon nanotubes by single step sol-gel processing",

abstract = "Synthesis of multi-walled carbon nanotubes (MWCNTs) doped silica xerogel films was reported in this work. A crucial step of introducing MWCNTs was achieved by functionalizing them by acid treatment to form stable and homogenous SiO 2/MWCNTs sol. Scanning electron microscopy showed spherical particles in honeycomb network structure for undoped xerogel films whereas dispersion and wrapping of MWCNTs in silica matrix was observed for MWCNTs doped films. Various bond formations during the sol-gel process and surface modification were confirmed using Fourier transform infra-red and detailed study on the chemical bonding state of the films was carried out using X-ray photoelectron spectroscopy. Nanoindentation studies showed that the mechanical properties of MWCNTs doped xerogel film increase dramatically: higher modulus (E = 2.127 ± 0.095 GPa) and hardness (H = 0.035 ± 0.017 GPa) values than those of pristine xerogel film (E = 0.234 ± 0.058 GPa, H = 0.01 ± 0.003 GPa).",

author = "Jung, {In Keun} and Gurav, {Jyoti L.} and Bangi, {Uzma K.H.} and Seungsu Baek and Park, {Hyung Ho}",

note = "Funding Information: The authors are grateful to Brain Korea 21 Phase II programme for the financial support for this work. We also thankful to Agency for Defense Development project for funding support. ",

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AU - Gurav, Jyoti L.

AU - Bangi, Uzma K.H.

AU - Baek, Seungsu

AU - Park, Hyung Ho

N1 - Funding Information: The authors are grateful to Brain Korea 21 Phase II programme for the financial support for this work. We also thankful to Agency for Defense Development project for funding support.

PY - 2012/2/1

Y1 - 2012/2/1

N2 - Synthesis of multi-walled carbon nanotubes (MWCNTs) doped silica xerogel films was reported in this work. A crucial step of introducing MWCNTs was achieved by functionalizing them by acid treatment to form stable and homogenous SiO 2/MWCNTs sol. Scanning electron microscopy showed spherical particles in honeycomb network structure for undoped xerogel films whereas dispersion and wrapping of MWCNTs in silica matrix was observed for MWCNTs doped films. Various bond formations during the sol-gel process and surface modification were confirmed using Fourier transform infra-red and detailed study on the chemical bonding state of the films was carried out using X-ray photoelectron spectroscopy. Nanoindentation studies showed that the mechanical properties of MWCNTs doped xerogel film increase dramatically: higher modulus (E = 2.127 ± 0.095 GPa) and hardness (H = 0.035 ± 0.017 GPa) values than those of pristine xerogel film (E = 0.234 ± 0.058 GPa, H = 0.01 ± 0.003 GPa).

AB - Synthesis of multi-walled carbon nanotubes (MWCNTs) doped silica xerogel films was reported in this work. A crucial step of introducing MWCNTs was achieved by functionalizing them by acid treatment to form stable and homogenous SiO 2/MWCNTs sol. Scanning electron microscopy showed spherical particles in honeycomb network structure for undoped xerogel films whereas dispersion and wrapping of MWCNTs in silica matrix was observed for MWCNTs doped films. Various bond formations during the sol-gel process and surface modification were confirmed using Fourier transform infra-red and detailed study on the chemical bonding state of the films was carried out using X-ray photoelectron spectroscopy. Nanoindentation studies showed that the mechanical properties of MWCNTs doped xerogel film increase dramatically: higher modulus (E = 2.127 ± 0.095 GPa) and hardness (H = 0.035 ± 0.017 GPa) values than those of pristine xerogel film (E = 0.234 ± 0.058 GPa, H = 0.01 ± 0.003 GPa).

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Silica xerogel films hybridized with carbon nanotubes by single step sol-gel processing

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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