Chiral Distortion of Confined Ice Oligomers (n = 5,6)

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• 作者：Haifeng Ma ; Yun Ding ; Marcella Iannuzzi ; Thomas Brugger ; Simon Berner ; J眉rg Hutter ; J眉rg Osterwalder ; Thomas Greber
• 刊名：Langmuir
• 出版年：2012
• 出版时间：October 30, 2012
• 年：2012
• 卷：28
• 期：43
• 页码：15246-15250
• 全文大小：334K
• 年卷期：v.28,no.43(October 30, 2012)
• ISSN：1520-5827

文摘

Ice nuclei have been studied on the hexagonal boron nitride nanomesh (h-BN/Rh(111)), a template with 2 nm wide molecule traps. Scanning tunneling microscopy shows confined clusters, where oligomers with three protrusions are particularly abundant. Together with local barrier height dI/dz maps, it is found that the dipoles of the water molecules arrange in a homodrome, which is consistent with density functional theory calculations. Hydrogen bonds toward the substrate identify h-BN/Rh(111) to be hydrophilic. The substrate distorts the hexamers (n = 6) and possibly pentamers (n = 5), where the experimentally observed footprints of the three protrusions appear more chiral than expected.