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 language | English |
|---|---|
| Article number | 297197 |
| Journal | Journal of Nanomaterials |
| Volume | 2015 |
| DOIs | |
| Publication status | Published - 2015 |
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ASJC Scopus subject areas
- Materials Science(all)
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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 journal › Article
}
TY - JOUR
T1 - Preparation of Oleyl Phosphate-Modified TiO2/Poly(methyl methacrylate) Hybrid Thin Films for Investigation of Their Optical Properties
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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U2 - 10.1155/2015/297197
DO - 10.1155/2015/297197
M3 - Article
VL - 2015
JO - Journal of Nanomaterials
JF - Journal of Nanomaterials
SN - 1687-4110
M1 - 297197
ER -