• Title, Summary, Keyword: nanotechnology

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Fabrication of transparent conducting films of carbon nanotubes using a spray method

  • Geng, Hong Zhang;Lee, Kyu;Song, Young-Il;Kim, Gil-Yong;Choi, Ha-Kyu;Jun, Bae-Jung;Ahn, Kay-Hyeok;Lee, Young-Hee
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.525-528
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    • 2006
  • Transparent conducting films were fabricated on polyethylene terephthalate substrate by a spray method using double-walled carbon nanotubes dispersed in organic solvent and water-based solution. We analyzed the films by absorption spectra, sheet resistance, and scanning electron microscopy. Transparent conducting films with high uniformity and high transparency were fabricated by the spray method. We found that the dispersion particularly nanodispersion of CNTs was of crucial importance to improve the film performance.

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Non-blinking dendritic crystals from C-dot solution

  • Mewada, Ashmi;Vishwakarma, Ritesh;Patil, Bhushan;Phadke, Chinmay;Kalita, Golap;Sharon, Maheshwar;Sharon, Madhuri
    • Carbon letters
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    • v.16 no.3
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    • pp.211-214
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    • 2015
  • Bio-imaging and drug carriers for delivery have created a huge demand for crystals. Crystals are fascinating materials that have been grown for a long time but obtaining biocompatible fluorescent crystals is a challenging task. We report on the growth of fluorescent crystals using a carbon dot (C-dot) solution by a hydrothermal process. The crystallization pattern of these C-dots exhibited a unique dendritic structure having a feather-like morphology. The growth temperature and pressure were maintained at 60℃ and 200 mmHg, respectively, for crystal growth. A green fluorescence (under UV light) that was observed in the C-dot solution was retained in the crystals formed from the solution. Cytotoxicity studies on Vero cells revealed the crystals to be extremely biocompatible. These fluorescent crystals are extremely well suited for biomedical and optoelectronic applications.

Synthesis and field emission of double-walled carbon nanotubes

  • Lee, S.H.;Jung, S.I.;Lee, T.J.;Kim, W.S.;Cho, J.H.;Kang, H.J.;Kwon, G.M.;Park, C.J.;Seo, S.H.;Jeon, K.Y.;Ha, B.;Lee, C.J.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1087-1090
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    • 2005
  • We have investigated the synthesis and field emission properties of high-quality double-walled carbon nanotubes (DWCNTs) using a catalytic chemical vapor deposition method and a hydrogen arc discharge method. The produced carbon materials using a catalytic CVD method indicated high-purity DWCNT bundles free of amorphous carbon covering on the surface. By adopting a hydrogen arc discharge method, we could obtained high-purity DWCNTs in large-scale. DWCNTs showed low turn-on voltage and higher emission stability compared with SWCNTs.

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