Objective
A scanning tunnelling microscope (STM) was designed and built. Atomic resolution was achieved. Research was carried out into zeolite topography and spectroscopy at atomic scale. Preliminary results include data on the local forces between the scanning tip and the zeolite surface.
A commercially available STM was used to study fullerene molecules. Examination of the growth of Buckminster fullerene (C60) on lamellar substrates revealed triangular structures.
Several computational techniques have been developed to account for the 3-dimensional character of electron tunnelling in simplified models of scanning tunnelling microscopy.
An ultra high vacuum scanning tunnelling microscope (STM) has been developed which yields atomic resolution. Software to control the system has been written. A preparation chamber with an airlock has been constructed, and a transportable ultra high vacuum container (vacuum suitcase) has been developed to carry samples between the low energy ion implanter and the STM. The vacuum suitcase has complex specimen handling facilities, industry viewport, wobblesticks and transfer canes.
The STM has been used to study copper surfaces irradiated with low energy helium ions. Small rounded features were observed and the nature of their formation is discussed.
The result of depositing copper by low energy ion beam deposition on graphite was studied. The expitaxial copper film quality was poor.
Scanning tunnelling microscopy (STM) has been used to investigate the relation between the structural quality and the electronic properties of thin metal films. The STM system (Nanoscope II) is reliable and permits the inspection of surface topography to within a few arc minutes.
The surface topography of thin gold films has been linked to the preparation conditions. For deposition at liquid nitrogen temperature the films are polycrystalline with a grain size of about 15 nm. Deposition at room temperature increases the lateral size of the grains. At 250 C, the gold films show the formation of micron sized crystallites on which atomically flat regions can be observed.
The quality of fine gold lines (width 30 nm) grown on silicon oxide (SiO2) substrates has been probed. Lines evaporated in a residual atmosphere of oxygen or helium have a more homogeneous film structure and are frees of holes than those evaporated in vacuo.
STM has also been used for lithography. Narrow gold lines were fabricated by developing locally a thin resist layer with STM. Local field evaporation of atoms at the edges of terraces on high temperature superconductor films has been used to modify the characteristic topography of yttrium barium copper oxide (YBa2Cu307).
STM in an ultra high vacuum (10E-10 mbar) has been used to determine the fractal surface structure of a rough gold surface, and to investigate erosion of an iron film surface by an ion beam.
The present twinning project aims at helping the participating laboratories to develop a common capability in Scanning Tunneling Microscopy, Scanning Tunneling Spectrocopy and Atomic Force
Microscopy. In the first phase of the project, the mechanical and electronic components will be realized and assembled in a coordinated effort. In the exploitation phase, the instrument will be used to investigate 1) the effects of ion-beam deposition and implantation on the topography of surfaces; 2) the surface structure during thin film growth and 3) surface electronic states of semiconductors under laser illumination.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences chemical sciences inorganic chemistry noble gases
- natural sciences chemical sciences inorganic chemistry inorganic compounds
- natural sciences chemical sciences inorganic chemistry transition metals
- natural sciences physical sciences astronomy planetary sciences planetary geology
- natural sciences physical sciences optics microscopy scanning tunneling microscopy
You need to log in or register to use this function
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Data not available
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
NAMUR / NAMEN
Belgium
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.