Single-molecule vibrational spectroscopy and microscopy
Single-molecule vibrational spectroscopy and microscopy
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DOI：
10.1126/science.280.5370.1732
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发表时间：
1998-06-12
期刊：
影响因子：
56.9
通讯作者：
Ho, W
中科院分区：
文献类型：
--
作者：
Stipe, BC;Rezaei, MA;Ho, W
用扫描隧道显微镜（STM）获得了吸附在固体表面上的单个分子的振动谱。吸附在铜（100）表面的孤立乙炔（C2H2）分子的非弹性电子隧穿光谱显示，在358毫伏时，由于C-H拉伸模式的激发，隧穿电导增加。氘化乙炔（C2D2）的同位素位移为266毫伏。非弹性隧道通道空间成像的振动显微镜获得了进一步区分和表征这两种同位素的额外数据。单分子振动分析有助于在原子水平上更好地理解和控制表面化学。
Vibrational spectra for a single molecule adsorbed on a solid surface have been obtained with a scanning tunneling microscope (STM). Inelastic electron tunneling spectra for an isolated acetylene (C2H2) molecule adsorbed on the copper (100) surface showed an increase in the tunneling conductance at 358 millivolts, resulting from excitation of the C-H stretch mode. An isotopic shift to 266 millivolts was observed for deuterated acetylene (C2D2). Vibrational microscopy from spatial imaging of the inelastic tunneling channels yielded additional data to further distinguish and characterize the two isotopes. Single-molecule vibrational analysis should lead to better understanding and control of surface chemistry at the atomic level.