scholarly journals Capillary force-induced superlattice variation atop a nanometer-wide graphene flake and its moiré origin studied by STM

2019 ◽  
Vol 10 ◽  
pp. 804-810
Author(s):  
Loji K Thomas ◽  
Michael Reichling
Keyword(s):  
Capillary Force ◽  
Orientation Angle ◽  
Scanning Tunneling ◽  
Total Expenditure ◽  
Liquid Interfaces ◽  
Tunneling Microscopy ◽  
Graphene Flake ◽  
Before And After ◽  
Solid Liquid Interface ◽  
Solid Liquid

We present strong experimental evidence for the moiré origin of superlattices on graphite by imaging a live transition from one superlattice to another with concurrent and direct measurement of the orientation angle before and after rotation using scanning tunneling microscopy (STM). This has been possible due to a fortuitous observation of a superlattice on a nanometer-sized graphene flake wherein we have induced a further rotation of the flake utilizing the capillary forces at play at a solid–liquid interface using STM tip motion. We propose a more “realistic” tip–surface meniscus relevant to STM at solid–liquid interfaces and show that the capillary force is sufficient to account for the total expenditure of energy involved in the process.

Potential- and concentration-dependent self-assembly structures at solid/liquid interfaces

Nanoscale ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 3438-3443 ◽  
Author(s):  
Zhen-Feng Cai ◽  
Hui-Juan Yan ◽  
Dong Wang ◽  
Li-Jun Wan
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Self Assembly ◽  
Scanning Tunneling ◽  
Liquid Interfaces ◽  
Tunneling Microscopy ◽  
Controlled Assembly ◽  
Electrochemical Scanning Tunneling Microscopy ◽  
Solid Liquid

We report the potential and concentration controlled assembly of an alkyl-substituted benzo[1,2-b:4,5-b′]dithiophene (DDBDT) on an Au(111) electrode byin situelectrochemical scanning tunneling microscopy (ECSTM).

scholarly journals Self-assembled monolayers of shape-persistent macrocycles on graphite: interior design and conformational polymorphism

2014 ◽  
Vol 10 ◽  
pp. 2774-2782 ◽  
Author(s):  
Joscha Vollmeyer ◽  
Friederike Eberhagen ◽  
Sigurd Höger ◽  
Stefan-S Jester
Keyword(s):  
Interior Design ◽  
Pyrolytic Graphite ◽  
Self Assembled Monolayers ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Conformational Polymorphism ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Solid Liquid Interface ◽  
Solid Liquid

Three shape-persistent naphthylene–phenylene–acetylene macrocycles of identical backbone structures and extraannular substitution patterns but different (empty, apolar, polar) nanopore fillings are self-assembled at the solid/liquid interface of highly oriented pyrolytic graphite and 1,2,4-trichlorobenzene. Submolecularly resolved images of the resulting two-dimensional (2D) crystalline monolayer patterns are obtained by in situ scanning tunneling microscopy. A concentration-dependent conformational polymorphism is found, and open and more dense packing motifs are observed. For all three compounds alike lattice parameters are found, therefore the intermolecular macrocycle distances are mainly determined by their size and symmetry. This is an excellent example that the graphite acts as a template for the macrocycle organization independent from their specific interior.

scholarly journals Dynamic host–guest behavior in halogen-bonded two-dimensional molecular networks investigated by scanning tunneling microscopy at the solid/liquid interface

2020 ◽  
Vol 2 (10) ◽  
pp. 4895-4901
Author(s):  
Yoshihiro Kikkawa ◽  
Mayumi Nagasaki ◽  
Emiko Koyama ◽  
Seiji Tsuzuki ◽  
Thierry Fouquet ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Liquid Interface ◽  
Molecular Networks ◽  
Scanning Tunneling ◽  
Two Dimensional ◽  
Tunneling Microscopy ◽  
2D Structure ◽  
Solid Liquid Interface ◽  
Solid Liquid

Dynamic host–guest behavior is investigated in halogen-bonded molecular networks, and the change in the 2D structure due to guest inclusion is revealed by scanning tunneling microscopy at the solid/liquid interface.

Bicomponent blend-directed amplification of the alkyl chain effect on the 2D structures

2014 ◽  
Vol 50 (86) ◽  
pp. 13146-13149 ◽  
Author(s):  
Yoshihiro Kikkawa ◽  
Manami Ishitsuka ◽  
Ayumi Kashiwada ◽  
Seiji Tsuzuki ◽  
Kazuhisa Hiratani
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Alkyl Chain ◽  
Liquid Interface ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Solid Liquid Interface ◽  
Solid Liquid

The 2D structures of bicomponent blends in isobutenyl compounds were observed by using scanning tunneling microscopy at the solid/liquid interface. Amplification of the alkyl chain effect was found on the 2D structures.

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