Identifying tips for intramolecular NC-AFM imaging via in situ fingerprinting.
Identifying tips for intramolecular NC-AFM imaging via in situ fingerprinting.
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通过原位指纹识别分子内 NC-AFM 成像的技巧
DOI:
10.1038/srep06678
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发表时间:
2014-10-20
影响因子:
4.6
通讯作者:
Kantorovich L
中科院分区:
文献类型:
--
作者:
Sang H;Jarvis SP;Zhou Z;Sharp P;Moriarty P;Wang J;Wang Y;Kantorovich L
A practical experimental strategy is proposed that could potentially enable greater control of the tip apex in non-contact atomic force microscopy experiments. It is based on a preparation of a structure of interest alongside a reference surface reconstruction on the same sample. Our proposed strategy is as follows. Spectroscopy measurements are first performed on the reference surface to identify the tip apex structure using a previously collected database of responses of different tips to this surface. Next, immediately following the tip identification protocol, the surface of interest is studied (imaging, manipulation and/or spectroscopy). The prototype system we choose is the mixed Si(111)-7×7 and Ag:Si(111)-(√3 × √3) R30° surface which can be prepared on the same sample with a controlled ratio of reactive and passivated regions. Using an "in silico" approach based on ab initio density functional calculations and a set of tips with varying chemical reactivities, we show how one can perform tip fingerprinting using the Si(111)-7×7 reference surface. Then it is found by examining the imaging of a naphthalene tetracarboxylic diimide (NTCDI) molecule adsorbed on Ag:Si(111)-(√3 × √3) R30° surface that negatively charged tips produce the best intramolecular contrast attributed to the enhancement of repulsive interactions.
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影响因子:
56.9
作者:
Lantz, MA;Hug, HJ;Güntherodt, HJ
通讯作者:
Güntherodt, HJ
影响因子:
3.2
作者:
ALBRECHT, TR;GRUTTER, P;RUGAR, D
通讯作者:
RUGAR, D
影响因子:
56.9
作者:
Gross, Leo;Mohn, Fabian;Meyer, Gerhard
通讯作者:
Meyer, Gerhard
影响因子:
3.5
作者:
Fujii, S;Fujihira, M
通讯作者:
Fujihira, M
DOI:
10.1039/9781849734844-00116
发表时间:
2013-01-01
期刊:
NANOSCIENCE, VOL 1: NANOSTRUCTURES THROUGH CHEMISTRY
影响因子:
--
作者:
Moriarty, Philip
通讯作者:
Moriarty, Philip