Thermal stability of succinate and acetate on a Cu(1 1 0) surface
Thermal stability of succinate and acetate on a Cu(1 1 0) surface
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Cu(1 1 0) 表面上琥珀酸盐和乙酸盐的热稳定性
DOI：
10.1016/j.apsusc.2004.09.059
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发表时间：
2005
影响因子：
6.7
通讯作者：
T. Chikyow
中科院分区：
文献类型：
--
作者：
S. Yagyu;M. Yoshitake;T. Chikyow
制作了氦原子束散射仪，用于研究表面吸附有机分子的热动力学。该装置的角分辨率为6°，能量分辨率为20%，入射能量为Ei=63meV。我们使用dw图技术（He光束从表面反射的强度的温度变化）测量了Cu（110）上乙酸（CH3-COOH）和琥珀酸（HOOC-CH2-CH2-COOH）结构的热稳定性。我们发现从dw图中得到的脱附温度为：低覆盖乙酸盐540K，醋酸c(2×2) 550K，琥珀酸盐590K。琥珀酸盐的解吸温度高于乙酸盐，这可以解释为在一个分子中有更多的羧酸盐。
We made a helium atom beam scattering (HAS) apparatus to study the thermal dynamics of adsorbed organic molecules on a surface. The apparatus had an angular resolution of 6° and energy resolutions of 20%, with an incident energy of Ei=63meV. We measured the thermal stability of acetic acid (CH3–COOH) and succinic acid (HOOC–CH2–CH2–COOH) structures on a Cu(110) using the DW-plot technique (the temperature variation of intensity of the He beam specularly reflected from the surface). We found that the desorption temperatures derived from DW-plots are 540K for low-coverage acetate, 550K for c(2×2) acetate and 590K at succinate. The desorption temperature of succinate is higher than acetate, which is interpreted by a larger number of carboxylates in one molecule.