scholarly journals Bipolar device fabrication using a scanning tunnelling microscope

Author(s):  
Tomáš Škereň ◽  
Sigrun A. Köster ◽  
Bastien Douhard ◽  
Claudia Fleischmann ◽  
Andreas Fuhrer
Author(s):  
W.K. Lo ◽  
J.C.H. Spence

An improved design for a combination Scanning Tunnelling Microscope/TEM specimen holder is presented. It is based on earlier versions which have been used to test the usefulness of such a device. As with the earlier versions, this holder is meant to replace the standard double-tilt specimen holder of an unmodified Philips 400T TEM. It allows the sample to be imaged simultaneously by both the STM and the TEM when the TEM is operated in the reflection mode (see figure 1).The resolution of a STM is determined by its tip radii as well as its stability. This places strict limitations on the mechanical stability of the tip with respect to the sample. In this STM the piezoelectric tube scanner is rigidly mounted inside the endcap of the STM holder. The tip coarse approach to the sample (z-direction) is provided by an Inchworm which is located outside the TEM vacuum.


2018 ◽  
Author(s):  
Gaolei Zhan ◽  
Younes Makoudi ◽  
Judicael Jeannoutot ◽  
Simon Lamare ◽  
Michel Féron ◽  
...  

Over the past decade, on-surface fabrication of organic nanostructures has been widely investigated for the development of molecular electronic devices, nanomachines, and new materials. Here, we introduce a new strategy to obtain alkyl oligomers in a controlled manner using on-surface radical oligomerisations that are triggered by the electrons/holes between the sample surface and the tip of a scanning tunnelling microscope. The resulting radical-mediated mechanism is substantiated by a detailed theoretical study. This electron transfer event only occurs when <i>V</i><sub>s</sub> < -3 V or <i>V</i><sub>s</sub> > + 3 V and allows access to reactive radical species under exceptionally mild conditions. This transfer can effectively ‘switch on’ a sequence leading to formation of oligomers of defined size distribution due to the on-surface confinement of reactive species. Our approach enables new ways to initiate and control radical oligomerisations with tunnelling electrons, leading to molecularly precise nanofabrication.


Nanoscale ◽  
2021 ◽  
Author(s):  
Tuhin Shuvra Basu ◽  
Simon Diesch ◽  
Ryoma Hayakawa ◽  
Yutaka Wakayama ◽  
Elke Scheer

We examined the modified electronic structure and single-carrier transport of individual hybrid core–shell metal–semiconductor Au-ZnS quantum dots using a scanning tunnelling microscope.


2011 ◽  
Vol 22 (17) ◽  
pp. 175201 ◽  
Author(s):  
T Wang ◽  
E Boer-Duchemin ◽  
Y Zhang ◽  
G Comtet ◽  
G Dujardin

Author(s):  
D J Whitehouse

Surfaces have been measured for many years yet there are still many factors which have not been optimized both for the contacting methods and non-contacting methods. In this paper the philosophy of optimization for both types of system is examined and rules established for improvement of system fidelity. In particular, ways are suggested of increasing the speed of measurement. This new philosophy has implications when consideration is being given to improving the performance of the modern generation of surface measuring instruments. These include not only those measuring geometry such as the scanning tunnelling microscope but also devices for measuring force and friction.


1995 ◽  
Vol 264 (2) ◽  
pp. 259-263 ◽  
Author(s):  
K. Kragler ◽  
E. Günther ◽  
R. Leuschner ◽  
G. Falk ◽  
H. von Seggern ◽  
...  

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Jun-Yi Ge ◽  
Vladimir N. Gladilin ◽  
Jacques Tempere ◽  
Cun Xue ◽  
Jozef T. Devreese ◽  
...  

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