Postdoctoral position: Probing chemistry at atmospheric interfaces: aerosol surface spectroscopy
Poste de Postdoctorat en Chimie des Interfaces Atmosphériques
Aarhus Universitet à la recherche d’un expert en spectroscopy
Titre du poste : Postdoctoral position: Probing chemistry at atmospheric interfaces: aerosol surface spectroscopy
Entreprise : Aarhus Universitet
Description du poste
Le groupe de recherche de Tobias Weidner au sein du Center for Chemistry of Clouds (C3) d’Aarhus Université recrute un postdoctorant pour mener une série d’expériences multidisciplinaires. L’objectif de ce poste est d’explorer le rôle de la chimie de surface des aérosols dans la formation des nuages, avec des implications pour la recherche climatique et écologique.
Début de l’emploi et durée
La date de début est flexible, avec une préférence pour le 1er octobre 2025 ou à une date proche. La durée initiale de l’emploi sera de 24 mois.
Objectifs de recherche
Les particules d’aérosols jouent un rôle central dans la formation des nuages. Émises par diverses sources ou formées dans l’atmosphère par des réactions photochimiques, ces particules subissent un « vieillissement » pendant leur durée de vie atmosphérique, ce qui modifie leurs propriétés et leur capacité à agir comme noyaux pour la formation de nuages.
Le postdoctorant travaillera en étroite collaboration avec des spécialistes des aérosols du groupe de Merete Bilde au sein du centre C3, cherchant à corréler la structure moléculaire de la surface des aérosols et des gouttes d’eau dans différentes conditions avec les propriétés des aérosols et leur impact sur les nuages.
Responsabilités clés
- Développer un système d’échantillonnage et d’interface pour étudier les aérosols à l’aide de la spectroscopie laser ultrarapide.
- Utiliser des techniques de spectroscopie laser ultrarapide, telles que la spectroscopie de dispersion en fréquence de somme (SFS) et la spectroscopie infrarouge 2D, pour examiner la structure moléculaire et les dynamiques aux interfaces des gouttes d’eau.
- Analyser comment les conditions environnementales, comme les niveaux d’humidité, la température et les oxydants, influencent la structure moléculaire de l’eau à la surface des aérosols et des gouttes.
Environnement de travail
Ce projet sera mené au sein du dernier Centre d’Excellence, dans un environnement de recherche dynamique et ambitieux, doté d’excellentes installations expérimentales en chimie physique et atmosphérique. Les postdoctorants ont l’opportunité de collaborer avec d’autres chercheurs au sein de C3 ainsi qu’avec des partenaires internationaux, offrant des possibilités de voyage dans le cadre du projet de recherche.
Profil recherché
Les candidats doivent démontrer une forte motivation pour travailler sur les interfaces, ainsi qu’une expertise dans la mise en place et la réalisation de spectroscopies laser. Cela constitue un critère essentiel pour être considéré pour le poste.
Conditions et procédure de candidature
Le lieu de travail est Langelandsgade 140, 8000 Aarhus C, au sein du Département de Chimie de l’Université d’Aarhus. Les candidats doivent soumettre leur application en anglais, qui doit comprendre un CV, un diplôme, une liste complète des publications, un énoncé des projets de recherche futurs, un portfolio d’enseignement et des informations vérifiées sur l’expérience d’enseignement antérieure si applicable.
Les candidatures seront évaluées par une commission d’experts après la date limite. Les candidats retenus seront informés de la composition de la commission et auront la possibilité de commenter l’évaluation.
Pour plus d’informations, vous pouvez contacter le professeur associé Tobias Weidner. Les lettres de référence doivent être soumises avec les coordonnées du référent lors de la candidature.
Engagement en matière d’égalité
Aarhus University s’engage à être un lieu de travail inclusif, en valorisant l’égalité et la diversité. Tous les candidats, sans distinction, sont les bienvenus à postuler.
Pour postuler
Cette opportunité de postdoctorat à Aarhus Universitet représente non seulement un pas vers une carrière enrichissante, mais aussi une contribution significative à la recherche sur le climat et les écosystèmes, à travers une compréhension approfondie des interactions entre aérosols et nuages.
📅 Date de publication de l’offre : Thu, 05 Jun 2025 06:16:00 GMT
🏢 Entreprise : Aarhus Universitet
📍 Lieu : Aarhus, Midtjylland
💼 Intitulé du poste : Postdoctoral position: Probing chemistry at atmospheric interfaces: aerosol surface spectroscopy
💶 Rémunération proposée :
📝 Description du poste : The research group of Tobias Weidner within the Center for Chemistry of Clouds (C3) at Aarhus University seeks to a postdoc for a series of multidisciplinary experiments. As a postdoc within this project, you will study the role of aerosol surface chemistry for the formation of clouds with implications for climate and ecosystems research. For this unique approach, C3 seeks to hire a postdoc with expertise in surface spectroscopy to work in close collaboration with the atmospheric scientists within the center.Start date and duration of employment The starting date is flexible. A date of 1. October 2025 or soon thereafter is preferred. The initial duration of the employment will be 24 months.Job description/research project/research area
Aerosol particles play a central role in the formation of clouds. Particles are emitted from a variety of sources or formed in the atmosphere via photochemical reactions. During their atmospheric lifetime aerosol particles undergo “ageing”; chemical reactions and processes that change particle properties and their ability to act as nuclei for cloud formation.The postdoc will work in close collaboration with aerosol specialists in Merete Bilde’s group within the C3 center to correlate molecular structure of the surface of aerosols and water droplets under different conditions with aerosol properties and cloud impact. Eventually, the aim will be to understand how particles and water molecules interact to form clouds. The experiments will be complemented with off-line chemical analysis and molecular modelling with collaborating groups in C3.The position will focus on the study of molecular structure at the surface of aerosols and water droplets. Key responsibilities include:
- Assist in development of sampling and interface system to study aerosols using ultrafast laser spectroscopy
- Employing ultrafast laser spectroscopy techniques, such as sum frequency scattering (SFS) spectroscopy and 2D infrared spectroscopy, to investigate the molecular structure and dynamics at water droplet interfaces.
- Examining how environmental conditions, including varying levels of humidity, temperature, and oxidants, influence the molecular structure of water at aerosol and droplet surfaces
The project will be carried out within the newly established Center of Excellence: in a dynamic and ambitious research environment using excellent experimental facilities for physical and atmospheric chemistry.Postdocs in our team have the opportunity for collaboration with other students and postdocs within C3 as well as international partners, providing the opportunity for international travel within the research project.Your profile
Outside of having a strong motivation to work on interfaces, postdoctoral fellows should have expertise in setting up and performing laser spectroscopies to be considered for the position.Formalities
The place of work is Langelandsgade 140, 8000 Aarhus C, and the area of employment is the Department of Chemistry, Aarhus University and related departments.Further information about the positions may be obtained from Associate Professor Tobias Weidner:Application procedure Shortlisting is used. This means that after the deadline for applications – and with the assistance from the assessment committee chairman, and the appointment committee if necessary, – the head of department selects the candidates to be evaluated. All applicants will be notified whether or not their applications have been sent to an expert assessment committee for evaluation. The selected applicants will be informed about the composition of the committee, and each applicant is given the opportunity to comment on the part of the assessment that concerns him/her self. Once the recruitment process is completed a final letter of rejection is sent to the deselected applicants.Letter of reference If you want a referee to upload a letter of reference on your behalf, please state the referee’s contact information when you submit your application. We strongly recommend that you make an agreement with the person in question before you enter the referee’s contact information, and that you ensure that the referee has enough time to write the letter of reference before the application deadline. Unfortunately, it is not possible to ensure that letters of reference received after the application deadline will be taken into consideration.If you wish to add a referee after you have submitted your application, you must send this person’s details (name, job title, place of work, and email address) as well as the name of the position you have applied for to: HR.Nattech@au.dkFormalities and salary range Natural Sciences refers to the .The application must be in English and include a curriculum vitae, degree certificate, a complete list of publications, a statement of future research plans and information about research activities, teaching portfolio and verified information on previous teaching experience (if any). Guidelines for applicants can be foundAppointment shall be in accordance with the collective labour agreement between the Danish Ministry of Taxation and the Danish Confederation of Professional Associations. Further information on qualification requirements and job content may be found in the .Salary depends on seniority as agreed between the Danish Ministry of Taxation and the Confederation of Professional Associations.Aarhus University’s ambition is to be an attractive and inspiring workplace for all and to foster a culture in which each individual has opportunities to thrive, achieve and develop. We view equality and diversity as assets, and we welcome all applicants.Research activities will be evaluated in relation to actual research time. Thus, we encourage applicants to specify periods of leave without research activities, in order to be able to subtract these periods from the span of the scientific career during the evaluation of scientific productivity.Aarhus University offers a broad variety of services for international researchers and accompanying families, including relocation service and career counselling to expat partners. Read more . Please find more information about entering and working in Denmark .Aarhus University also offers a Junior Researcher Development Programme targeted at career development for postdocs at AU. You can read more about it .At the Faculty of Natural Science at Aarhus University, we strive to support our scientific staff in their career development. We focus on competency development and career clarification and want to make your opportunities transparent. On , you can find information on all types of scientific positions, as well as the entry criteria we use when assessing candidates. You can also read more about how we can assist you in your career planning and development.The application must be submitted via Aarhus University’s recruitment system, which can be accessed under the job advertisement on Aarhus University’s website.Aarhus UniversityAarhus University is an academically diverse and research-intensive university with a strong commitment to high-quality research and education and the development of society nationally and globally. The university offers an inspiring research and teaching environment to its 38,000 students (FTEs) and 8,300 employees, and has an annual revenues of EUR 935 million. Learn more at
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