Quasi-ice monolayer on atomically smooth amorphous SiO2 at room temperature observed with a high-finesse optical resonator -: art. no. 166104
Quasi-ice monolayer on atomically smooth amorphous SiO2 at room temperature observed with a high-finesse optical resonator -: art. no. 166104
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DOI：
10.1103/physrevlett.95.166104
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发表时间：
2005-10-14
影响因子：
8.6
通讯作者：
van de Sanden, MCM
中科院分区：
文献类型：
--
作者：
Aarts, IMP;Pipino, ACR;van de Sanden, MCM
结合原子光滑羟基化无定形二氧化硅的H2O单层的结构在环境条件下探测近红外倏逝波腔衰荡吸收光谱。使用微型单片光学谐振器，我们发现表面OH和吸附H2O的尖锐（约10 cm（-1））和偏振（> 101）振动组合带，这揭示了不同局部环境中的有序物种。表明第一单分子层的独特性，吸附的H2O的吸收带显示强度饱和和线变窄，完成一个单层。有序的H2O单分子层的形成可能是由于H键合到准晶表面OH网络。
The structure of an H2O monolayer bound to atomically smooth hydroxylated amorphous silica is probed under ambient conditions by near-infrared evanescent-wave cavity ring-down absorption spectroscopy. Employing a miniature monolithic optical resonator, we find sharp (approximate to 10 cm(-1)) and polarized (> 101) vibration-combination bands for surface OH and adsorbed H2O, which reveal ordered species in distinct local environments. Indicating first-monolayer uniqueness, the absorption bands for adsorbed H2O show intensity saturation and line narrowing with completion of one monolayer. Formation of the ordered H2O monolayer likely arises from H bonding to a quasicrystalline surface OH network.