Preparation of Oleyl Phosphate-Modified TiO<inf>2</inf>/Poly(methyl methacrylate) Hybrid Thin Films for Investigation of Their Optical Properties

Masato Fujita, Naokazu Idota, Kimihiro Matsukawa, Yoshiyuki Sugahara

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    TiO<inf>2</inf> nanoparticles (NPs) modified with oleyl phosphate were synthesized through stable Ti-O-P bonds and were utilized to prepare poly(methyl methacrylate)- (PMMA-) based hybrid thin films via the ex situ route for investigation of their optical properties. After surface modification of TiO<inf>2</inf> NPs with oleyl phosphate, IR and <sup>13</sup>C CP/MAS NMR spectroscopy showed the presence of oleyl groups. The solid-state <sup>31</sup>P MAS NMR spectrum of the product revealed that the signal due to oleyl phosphate (OP) shifted upon reaction, indicating formation of covalent Ti-O-P bonds. The modified TiO<inf>2</inf> NPs could be homogeneously dispersed in toluene, and the median size was 16.1 nm, which is likely to be sufficient to suppress Rayleigh scattering effectively. The TEM images of TiO<inf>2</inf>/PMMA hybrid thin films also showed a homogeneous dispersion of TiO<inf>2</inf> NPs, and they exhibited excellent optical transparency even though the TiO<inf>2</inf> content was 20 vol%. The refractive indices of the OP-modified TiO<inf>2</inf>/PMMA hybrid thin films changed higher with increases in TiO<inf>2</inf> volume fraction, and the hybrid thin film with 20 vol% of TiO<inf>2</inf> showed the highest refractive index (n = 1.86).

    Original languageEnglish
    Article number297197
    JournalJournal of Nanomaterials
    Volume2015
    DOIs
    Publication statusPublished - 2015

    Fingerprint

    Polymethyl Methacrylate
    Polymethyl methacrylates
    Phosphates
    Optical properties
    Nanoparticles
    Thin films
    Refractive index
    Rayleigh scattering
    Toluene
    Transparency
    Nuclear magnetic resonance spectroscopy
    Surface treatment
    Volume fraction
    Nuclear magnetic resonance
    Transmission electron microscopy

    ASJC Scopus subject areas

    • Materials Science(all)

    Cite this

    Preparation of Oleyl Phosphate-Modified TiO<inf>2</inf>/Poly(methyl methacrylate) Hybrid Thin Films for Investigation of Their Optical Properties. / Fujita, Masato; Idota, Naokazu; Matsukawa, Kimihiro; Sugahara, Yoshiyuki.

    In: Journal of Nanomaterials, Vol. 2015, 297197, 2015.

    Research output: Contribution to journalArticle

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    title = "Preparation of Oleyl Phosphate-Modified TiO2/Poly(methyl methacrylate) Hybrid Thin Films for Investigation of Their Optical Properties",
    abstract = "TiO2 nanoparticles (NPs) modified with oleyl phosphate were synthesized through stable Ti-O-P bonds and were utilized to prepare poly(methyl methacrylate)- (PMMA-) based hybrid thin films via the ex situ route for investigation of their optical properties. After surface modification of TiO2 NPs with oleyl phosphate, IR and 13C CP/MAS NMR spectroscopy showed the presence of oleyl groups. The solid-state 31P MAS NMR spectrum of the product revealed that the signal due to oleyl phosphate (OP) shifted upon reaction, indicating formation of covalent Ti-O-P bonds. The modified TiO2 NPs could be homogeneously dispersed in toluene, and the median size was 16.1 nm, which is likely to be sufficient to suppress Rayleigh scattering effectively. The TEM images of TiO2/PMMA hybrid thin films also showed a homogeneous dispersion of TiO2 NPs, and they exhibited excellent optical transparency even though the TiO2 content was 20 vol{\%}. The refractive indices of the OP-modified TiO2/PMMA hybrid thin films changed higher with increases in TiO2 volume fraction, and the hybrid thin film with 20 vol{\%} of TiO2 showed the highest refractive index (n = 1.86).",
    author = "Masato Fujita and Naokazu Idota and Kimihiro Matsukawa and Yoshiyuki Sugahara",
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    AU - Fujita, Masato

    AU - Idota, Naokazu

    AU - Matsukawa, Kimihiro

    AU - Sugahara, Yoshiyuki

    PY - 2015

    Y1 - 2015

    N2 - TiO2 nanoparticles (NPs) modified with oleyl phosphate were synthesized through stable Ti-O-P bonds and were utilized to prepare poly(methyl methacrylate)- (PMMA-) based hybrid thin films via the ex situ route for investigation of their optical properties. After surface modification of TiO2 NPs with oleyl phosphate, IR and 13C CP/MAS NMR spectroscopy showed the presence of oleyl groups. The solid-state 31P MAS NMR spectrum of the product revealed that the signal due to oleyl phosphate (OP) shifted upon reaction, indicating formation of covalent Ti-O-P bonds. The modified TiO2 NPs could be homogeneously dispersed in toluene, and the median size was 16.1 nm, which is likely to be sufficient to suppress Rayleigh scattering effectively. The TEM images of TiO2/PMMA hybrid thin films also showed a homogeneous dispersion of TiO2 NPs, and they exhibited excellent optical transparency even though the TiO2 content was 20 vol%. The refractive indices of the OP-modified TiO2/PMMA hybrid thin films changed higher with increases in TiO2 volume fraction, and the hybrid thin film with 20 vol% of TiO2 showed the highest refractive index (n = 1.86).

    AB - TiO2 nanoparticles (NPs) modified with oleyl phosphate were synthesized through stable Ti-O-P bonds and were utilized to prepare poly(methyl methacrylate)- (PMMA-) based hybrid thin films via the ex situ route for investigation of their optical properties. After surface modification of TiO2 NPs with oleyl phosphate, IR and 13C CP/MAS NMR spectroscopy showed the presence of oleyl groups. The solid-state 31P MAS NMR spectrum of the product revealed that the signal due to oleyl phosphate (OP) shifted upon reaction, indicating formation of covalent Ti-O-P bonds. The modified TiO2 NPs could be homogeneously dispersed in toluene, and the median size was 16.1 nm, which is likely to be sufficient to suppress Rayleigh scattering effectively. The TEM images of TiO2/PMMA hybrid thin films also showed a homogeneous dispersion of TiO2 NPs, and they exhibited excellent optical transparency even though the TiO2 content was 20 vol%. The refractive indices of the OP-modified TiO2/PMMA hybrid thin films changed higher with increases in TiO2 volume fraction, and the hybrid thin film with 20 vol% of TiO2 showed the highest refractive index (n = 1.86).

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