Ag nanoparticle sheet as a marker of lateral remote photocatalytic reactions.
Ag nanoparticle sheet as a marker of lateral remote photocatalytic reactions.
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DOI：
10.1039/b9nr00240e
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发表时间：
2010-01
期刊：
影响因子：
6.7
通讯作者：
Takeshi Nagahiro;K. Ishibashi;Y. Kimura;M. Niwano;Tomohiro Hayashi;Yasuhiro Ikezoe;M. Hara;T. Tatsuma;K. Tamada
中科院分区：
文献类型：
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作者：
Takeshi Nagahiro;K. Ishibashi;Y. Kimura;M. Niwano;Tomohiro Hayashi;Yasuhiro Ikezoe;M. Hara;T. Tatsuma;K. Tamada
以“银纳米片”为标记物，研究了阳极氧化法制备的TiO（2）纳米管的侧向远距离光催化活性。银纳米片是由肉豆蔻酸酯封端的银纳米颗粒（d = 5 nm）组成的二维结晶膜，其在λ（max）= 470 nm处具有尖锐的局部等离子体吸收带。在石英基底上涂覆TiO（2）纳米管至10%的覆盖率，然后覆盖银纳米片。在UV照射时，清楚地证实了470 nm等离子体激元带的强度的快速降低和长波长吸收（550-1000 nm）带的增加，表明由于肉豆蔻酸酯封端剂的分解导致纳米颗粒的融合。通过高分辨率扫描电子显微镜（SEM）和原子力显微镜（AFM）测量的表面形貌显示，即使在距离TiO（2）纳米管1微米的表面区域，银纳米颗粒也发生了分解和融合。
The lateral remote photocatalytic activity of TiO(2) nanotubes fabricated by anodic oxidation, was characterized by use of a 'silver nanosheet' as a marker. The silver nanosheet is a two-dimensional crystalline film composed of myristate-capped silver nanoparticles (d = 5 nm), which has a sharp localized plasmon absorption band at lambda(max) = 470 nm. A quartz substrate was coated with TiO(2) nanotubes to a coverage of 10% and then covered with a silver nanosheet. Upon UV irradiation a rapid decrease in the intensity of the 470 nm plasmon band and an increase in the long-wavelength absorption (550-1000 nm) band were clearly confirmed, indicating fusion of the nanoparticles due to decomposition of the myristate capping agent. Surface morphology measured by high-resolution scanning electron microscopy (SEM) and atomic force microscopy (AFM) revealed the decomposition and fusion of silver nanoparticles even in regions of the surface a micron away from the TiO(2) nanotubes.