Short-Term Scientific Missions (STSMs) are face-to-face institutional visits aimed at supporting individual mobility to a host organisation located in a different country than the country of affiliation of the researcher or innovator and fostering collaboration between individuals. These missions contribute to the scientific objectives of COST Action CA23139 and we particularly encourage young scientists to apply for them.

Applications are only possible while calls are open.

There will be two calls for Mobility grants:

• The First Call for Mobility grants was open from December 15^th to January 31^st, 2026.
• The Second Call for Mobility grants is open from March 1^st to April 15^th, 2026.

Please note that all activities funded by these grants must be finished by August 15^th 2026.

Looking for a Host?

To facilitate contacts between prospective STSM applicants and potential hosts, Net4CleanAir has compiled a shared list of expressions of interest from individuals willing to host an STSM within the scope of the Action, with a focus on Indoor Air Cleaning.

List of potential STSM host opportunities (expressions of interest) 

Applicants are encouraged to contact potential hosts directly to discuss possible arrangements. Please note that all STSM applications follow the standard application and evaluation procedure, and identifying a host through this list does not guarantee funding. Applications are not restricted to the opportunities listed; proposals involving other suitable hosts are also welcome. This list is provided solely as a facilitation tool to support networking and mobility within the Action.

The detailed requirements and procedures for applying for grants with Net4CleanAir COST Action CA23139 can be downloaded here (PDF).