A two-dimensional crystal formed by pentamers on Au(111)

2019 ◽  
Vol 55 (38) ◽  
pp. 5427-5430 ◽  
Author(s):  
Chenyang Yuan ◽  
Na Xue ◽  
Xue Zhang ◽  
Yajie Zhang ◽  
Na Li ◽  
...  
Keyword(s):  
Low Temperature ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Two Dimensional ◽  
Scanning Tunnelling Microscope ◽  
Scanning Tunnelling ◽  
New Type ◽  
Temperature Scanning ◽  
Dimensional Crystal

A new type of two-dimensional crystal comprising supramolecular pentamers on Au(111) is studied using an ultra-high vacuum low-temperature scanning tunnelling microscope.

scholarly journals Development of a cryogenic system for a UHV manipulator for a light detection device in a LT-STM.

2019 ◽  
Author(s):  
Ronaldo Rodrigues Fernandes Vieira ◽  
Luiz Fernando Zagonel ◽  
Yves Maia Auad
Keyword(s):  
Low Temperature ◽  
Scanning Tunneling Microscope ◽  
Low Temperatures ◽  
Thermal Instability ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Cryogenic System ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Temperature Scanning

This project aims to develop a cryogenic system for a UHV (Ultra-High Vacuum) manipulator that is currently under development in our group and that will be installed inside a low temperature scanning tunneling microscope (LT-STM). This advice will be used as a light detector to collect the Luminescence in the STM scan, and since the equipment will operate in low temperatures, it is necessary that this advice also operate in low temperatures so that it won't cause thermal instability which would prefent image acquisition due to thermal drifts.

Packing fractal Sierpiński triangles into one-dimensional crystals via a templating method

2017 ◽  
Vol 53 (24) ◽  
pp. 3469-3472 ◽  
Author(s):  
Na Li ◽  
Gaochen Gu ◽  
Xue Zhang ◽  
Daoliang Song ◽  
Yajie Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Scanning Tunneling Microscopy ◽  
High Vacuum ◽  
Building Blocks ◽  
Ultra High Vacuum ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Templating Method ◽  
One Dimensional ◽  
Temperature Scanning

Crystalline structures with Sierpiński triangles as building blocks were constructedviaa templating method in ultra-high vacuum and studied by low-temperature scanning tunneling microscopy.

scholarly journals Strain-Relief Patterns and Kagome Lattice in Self-Assembled C60 Thin Films Grown on Cd(0001)

2021 ◽  
Vol 22 (13) ◽  
pp. 6880
Author(s):  
Zilong Wang ◽  
Minlong Tao ◽  
Daxiao Yang ◽  
Zuo Li ◽  
Mingxia Shi ◽  
...  
Keyword(s):  
Thin Films ◽  
Self Assembly ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Scanning Tunneling ◽  
Kagome Lattice ◽  
Tunneling Microscopy ◽  
Kagomé Lattice ◽  
Temperature Scanning ◽  
C60 Films

We report an ultra-high vacuum low-temperature scanning tunneling microscopy (STM) study of the C60 monolayer grown on Cd(0001). Individual C60 molecules adsorbed on Cd(0001) may exhibit a bright or dim contrast in STM images. When deposited at low temperatures close to 100 K, C60 thin films present a curved structure to release strain due to dominant molecule–substrate interactions. Moreover, edge dislocation appears when two different wavy structures encounter each other, which has seldomly been observed in molecular self-assembly. When growth temperature rose, we found two forms of symmetric kagome lattice superstructures, 2 × 2 and 4 × 4, at room temperature (RT) and 310 K, respectively. The results provide new insight into the growth behavior of C60 films.

scholarly journals Nanoribbons with Non-Alternant Topology from Fusion of Polyazulene: Carbon Allotropes Beyond Graphene

2019 ◽  
Author(s):  
Qitang Fan ◽  
Daniel Martin-Jimenez ◽  
Daniel Ebeling ◽  
Claudio K. Krug ◽  
Lea Brechmann ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Low Temperature ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Scanning Probe ◽  
Two Dimensional ◽  
Reaction Step ◽  
Functional Theory ◽  
Carbon Allotropes ◽  
Temperature Scanning

Various two-dimensional (2D) carbon allotropes with non-alternant topologies, such as pentaheptites and phagraphene, have been proposed. Predictions indicate that these metastable carbon polymorphs, which contain odd-numbered rings, possess unusual (opto)electronic properties. However, none of these materials has been achieved experimentally due to synthetic challenges. In this work, by using on-surface synthesis, nanoribbons of the non-alternant graphene allotropes, phagraphene and tetra-penta-hepta(TPH)-graphene have been obtained by dehydrogenative C-C coupling of 2,6-polyazulene chains. These chains were formed in a preceding reaction step via on-surface Ullmann coupling of 2,6-dibromoazulene. Low-temperature scanning probe microscopies with CO-functionalized tip and density functional theory calculations have been used to elucidate their structural properties. <br>

An ultra high vacuum low temperature gyroscope clock

1990 ◽  
Vol 165-166 ◽  
pp. 155-156 ◽  
Author(s):  
T. Walter ◽  
J.P. Turneaure ◽  
S. Buchman ◽  
C.W.F. Everitt ◽  
G.M. Keiser
Keyword(s):  
Low Temperature ◽  
High Vacuum ◽  
Ultra High Vacuum

Low-temperature ultra-high-vacuum scanning tunneling microscope

1992 ◽  
Vol 42-44 ◽  
pp. 1621-1626 ◽  
Author(s):  
R. Gaisch ◽  
J.K. Gimzewski ◽  
B. Reihl ◽  
R.R. Schlittler ◽  
M. Tschudy ◽  
...  
Keyword(s):  
Low Temperature ◽  
Scanning Tunneling Microscope ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Scanning Tunneling ◽  
Tunneling Microscope
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