Coherent Acoustic Oscillations of Nanorods Composed of Various Metals
Coherent Acoustic Oscillations of Nanorods Composed of Various Metals
复制标题
各种金属组成的纳米棒的相干声振荡
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Douglas J. Brown
中科院分区：
文献类型：
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作者：
J. Owrutsky;Michael B. Pomfret;Douglas J. Brown
超快瞬态吸收光谱已被用于表征由各种金属组成的一系列纳米棒的相干声振荡。纳米棒通过电化学合成在具有几个孔径的聚碳酸酯模板中产生。这些测量结果扩展了我们以前对Au、Ni和Pd的研究（Sando，G. M.;等人J. Chem. Phys. 2007，127，074705）以及Al纳米棒（Pomfret，M. B.;等人，Chem.Mater. 2008，20，5945）以包括由Ag、Cu、Pt、Fe、Rh和Co组成的那些。测量的声呼吸模式周期与基于经典弹性理论使用声速预测的那些一致。振荡的相位和阻尼的纳米棒的结构和激发机制进行了讨论。
Ultrafast transient absorption spectroscopy has been used to characterize coherent acoustic oscillations for a series of nanorods composed of a variety of metals. The nanorods are produced by electrochemical synthesis in polycarbonate templates with several pore diameters of 25). The measurements extend our previous studies on Au, Ni, and Pd (Sando, G. M.; et al. J. Chem. Phys. 2007, 127, 074705) as well as Al nanorods (Pomfret, M. B.; et al. Chem. Mater. 2008, 20, 5945) to include those composed of Ag, Cu, Pt, Fe, Rh, and Co. The acoustic breathing mode periods measured are consistent with those predicted based on classical elastic theory using the bulk speeds of sound. The phase and damping of the oscillations are discussed in terms of the nanorod structures and excitation mechanisms.