Investigation of Localized Surface Plasmon/Grating-coupled Surface Plasmon Enhanced Photocurrent of TiO 2 Thin Film
Investigation of Localized Surface Plasmon/Grating-coupled Surface Plasmon Enhanced Photocurrent of TiO 2 Thin Film
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发表时间：
2014-07
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通讯作者：
S. Nootchanat
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作者：
S. Nootchanat
TiO 2是一种著名的光催化剂。然而，由于其大的能带隙，只有紫外区的太阳光子才能激发这种光催化剂[1]。因此，提高TiO 2在可见光区的光催化活性成为人们关注的热点。在这项工作中，我们研究了AuNPs-TiO 2纳米复合材料的光电流特性。光电流的提高归因于金纳米颗粒的SPR效应。此外，我们还研究了金纳米颗粒的表面等离子体共振和金光栅的光栅耦合表面等离子体共振（GC-SPR）的结合对TiO 2光电流的增强作用。
TiO2 is known as a famous photocatalysts. However, only solar photon in UV region can excite this photocatalyst due to its large energy band gap [1]. Thus, the improvement of the photocatalytic activities of TiO2 in the visible region have been attached interest. In this work, we study the photocurrent properties of AuNPs-TiO2 nanocomposites. The improvement of the photocurrent is attributed to the effect of SPR of gold nanoparticles. Furthermore, we investigate the improvement of the photocurrent of TiO2 which is enhanced by the combination between SPR of gold nanoparticles and the grating-coupled SPR (GC-SPR) of gold grating.