Ultralow-energy ion implantation for the modification of 2D materials

Background

Low-energy ions are becoming more frequently employed for near-surface modification of materials, in simulating the effect of the fusion plasma on structural components fusion devices, and in tailoring the electronic properties of 2D materials. The 10 keV ion implanter (LEION) is a new setup at the Tandem Laboratory to initiate studies on the above-mentioned topics. The ion source of LEION is capable of producing a range of ion species, extracted from or gaseous solid media, both light and heavy, and with variable charge state. Implantation can be made in, in principle, any material. The precise limitations of the setup are currently unknown and it is therefore vital that these are tested in a systematic manner.

Project goal and work plan

The project will consist of systematically testing the capabilities of LEION, by implanting a broad range of ions into both thick targets such as silicon, and thin targets such as graphene. The implantations will then be assessed by a range of analysis techniques. The project can be divided into the following key tasks:

• implantation of ions generated from both gases and solids;
• implantation of both light and heavy ions;
• implantation into thick targets and 2D materials;
• implantation under both hot and cold conditions;
• analysis of the implanted materials using, for example, TEM, LEIS and μPIXE;
• propose and implement optimisations to LEION based on the results obtained;
• to write a report summarising the results and conclusions of the work.

The position will be based at the Ångström laboratory in Uppsala, within the Ion-physics Group. This project provides an excellent opportunity to become acquainted with the broad range of research being conducted within the Ion-physics group, and to make a long-standing contribution to its operation.

The project can be adjusted to correspond to 15, 30 or 45 ECTS credits and can start during either the autumn 2023, or spring 2024 semesters.

Desired qualifications/experience

The applicant should be enrolled on a program at Uppsala University and possess:

• good practical abilities
• strong interest in experimental work;
• excellent skills in both written and spoken English;
• knowledge/training in Nuclear Physics will be advantageous.

Students seeking diploma-work projects at both Master and Bachelor level are encouraged to apply, as are students seeking project work for courses (but such projects must correspond to at least 15 credits). The possibility of paired or group work can be discussed.

For further information please contact:

Robert Frost rob.frost@physics.uu.se