Luminscence Features and Phase Structure of Benzophenone-Titanium-Dioxide-Nanoparticle Nanocomposite

被引：5

作者：

Bezrodna, T. V. ^{[1
]}

Klishevich, G. V. ^{[1
]}

Curmei, N. D. ^{[1
]}

Telbiz, G. M. ^{[2
]}

Lebovka, N. I. ^{[3
]}

MeInyk, V. I. ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Inst Phys, UA-03039 Kiev, Ukraine

[2] Natl Acad Sci Ukraine, LV Pisarzhevsky Phys Chem Inst, Kiev, Ukraine

[3] Natl Acad Sci Ukraine, FD Ovcharenko Inst Biocolloidal Chem, Kiev, Ukraine

来源：

JOURNAL OF APPLIED SPECTROSCOPY | 2015年 / 82卷 / 04期

关键词：

luminescence; nanoparticle; titanium dioxide; benzophenone; thin film; surface; amorphous phase; bulk sample; phosphorescence lifetime;

D O I：

10.1007/s10812-015-0146-4

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The spectral and luminescence properties of the heterogeneous two-component composite benzophenone-TiO (2) -nanotubes (BP-NT) were studied in the temperature range 5-220 K. An analysis of the experimental data demonstrated that two structural modifications of benzophenone, amorphous and crystalline, existed simultaneously in the composite. The amorphous phase formed thin subsurface layers of benzophenone that were similar to 0.1-mu m thick in BP-NT. This thickness in the BP-NT composite was less than that in a benzophenone-TiO (2) -nanoparticle composite. It was found that triplet excitations were strongly quenched by the surface when the fi lm thickness became equal to the diffusion length of the triplet excitation. The results for the thin films and bulk benzophenone were compared.

引用

页码：567 / 572

页数：6

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