期刊
ACS NANO
卷 5, 期 9, 页码 7090-7099出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn201800e
关键词
molecular magnets; self-assembly; thermal deposition; thiol; STM; XMCD; density functional theory
类别
资金
- EPSRC (UK) [211284]
- MIUR [2008PARRTS, 2008NX9Y7]
- CINECA supercomputing center
- Royal Society
We show, by complementary spectroscopic and STM analysis, that Cr7Ni derivatives are suitable to be sublimed in UHV conditions. Cr7Ni-bu weakly bonds to gold surface and can diffuse relatively freely on it, forming monolayers with hexagonal 2D packing. Conversely, by adding a functional thiol group to the central dibutylamine, a covalent bond between the molecule and surface gold adatoms is promoted, leading to a strong molecular grafting and the formation of a disordered monolayer. These two examples demonstrate the possibility to control the assembly of a large molecular complex, as rationalized by DFT calculations that establish different energy scales in the deposition processes. Moreover, low-temperature XMCD sprectra show that the magnetic features of Cr7Ni rings deposited in UHV on gold remain unchanged with respect to those of the corresponding bulk sample.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据