scholarly journals Nanoscale tailoring of supramolecular crystals via an oriented external electric field

Nanoscale ◽  
2020 ◽  
Vol 12 (28) ◽  
pp. 15072-15080
Author(s):  
Xingming Zeng ◽  
Sadaf Bashir Khan ◽  
Ayyaz Mahmood ◽  
Shern-Long Lee
Keyword(s):  
Phase Transition ◽  
Electric Field ◽  
External Electric Field ◽  
Chemical Reaction ◽  
Scanning Tunneling Microscope ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Supramolecular Crystals

The oriented external electric field of a scanning tunneling microscope (STM) has recently been adapted for controlling the chemical reaction and supramolecular phase transition at surfaces with molecular precision.

Electric Field-induced switching among multiple conductance pathways in single-molecule junctions

2021 ◽  
Author(s):  
Tengyang Gao ◽  
Zhichao Pan ◽  
Zhuanyun Cai ◽  
Jueting Zheng ◽  
Chun Tang ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Single Molecule ◽  
Scanning Tunneling Microscope ◽  
Binding Sites ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Field Increase ◽  
Electric Field Increase ◽  
Single Molecule Junctions

Here, we report the switching among multiple conductance pathways achieved by sliding the scanning tunneling microscope tip among different binding sites under different electric fields. With the electric field increase,...

Deposition of Nano-Scale Ga Dots onto HF-Treated Si(111) Using a Scanning Tunneling Microscope

1992 ◽  
Vol 279 ◽  
Author(s):  
Katsuhiro Uesugi ◽  
Kiyoshi Sakata ◽  
Seiji Kawano ◽  
Masamichi Yoshimura ◽  
Takafumi Yao
Keyword(s):  
Electric Field ◽  
Scanning Tunneling Microscope ◽  
Voltage Pulse ◽  
Pulse Width ◽  
Pulse Height ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Nano Scale ◽  
Positive Voltage ◽  
Tentative Model

ABSTRACTNano-scale Ga dots are deposited through the decomposition of triethylgallium (TEGa) adsorbed on HF-treated Si(111) surfaces using a scanning tunneling microscope (STM). The deposition of Ga dots of 2–13 nm in diameter is achieved by applying a negative voltage pulse to the sample, while no deposition is observed when a positive voltage pulse is applied. The conditions for Ga deposition are systematically investigated by varying the gap conductance, pulse height, and pulse width. A tentative model for the mechanism of Ga deposition is proposed, in which TEGa molecules are decomposed by the electric field between the tip and the sample.

STM Study of Reconstruction on Si(III)

1996 ◽  
Vol 466 ◽  
Author(s):  
M. Umekawa ◽  
S. Ohara ◽  
S. Tatsukawa ◽  
H. Kuriyama ◽  
S. Matsumoto
Keyword(s):  
Phase Transition ◽  
Phase Boundary ◽  
Surface Structure ◽  
High Temperatures ◽  
Scanning Tunneling Microscope ◽  
Unit Cell ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Straight Line ◽  
Lower Terrace

ABSTRACTThe formation of the boron-induced reconstruction on Si(111) 7×7 surface has been studied with scanning tunneling microscope. By evaporating elemental B on Si elevated at high temperatures, reconstructed structures develop from the step edge to the adjacent lower terrace. They emerge at temperatures between 800°C and 900°C. It indicates that phase transition from 7×7 to 1×1 surface structure is necessary for forming the √3-B reconstructed structures. The phase boundary between 7×7 and regions is a straight line with termination of the faulted halves of 7×7 unit cell. It is also found that strip or triangle regions are formed, depending on the direction of the step propagation.

Examination of the Electrolytic Polishing Metal Probe for the Cell Trap by an Electric Field

2014 ◽  
Vol 595 ◽  
pp. 56-60
Author(s):  
Yuji Sekido ◽  
Kozo Taguchi
Keyword(s):  
Electric Field ◽  
Scanning Tunneling Microscope ◽  
Low Cost ◽  
Near Field ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Electrolytic Polishing ◽  
A Cell ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

Generally, the metal probe for NSOM (Near field scanning optical microscopy) or STM (Scanning Tunneling Microscope) was made with gold or tungsten. However, they were not suitable for the cell trap in our research for the reasons of cost, hardness, etc. In our research, these problems were solved by choosing brass as a material of a probe. Since the probe production by electrolytic polishing can change the shape of the top, tip angle, and taper length etc, we can propose a probe suitable for a cell trap. Therefore, in this examination, we propose the brass probe by electrolytic polishing with low cost and sufficient hardness for cell trap.

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