The advent of high-brilliance synchrotron radiation (SR) and free-electron laser (FEL) sources have led to a paradigm shift within scientific investigation across different research fields. In particular, these advanced light sources have enabled novel avenues for exploring the intricate structure and dynamic behavior of nanostructured materials. With intense radiation beams, scientists are able to probe the properties of materials with unprecedented precision. The simultaneous high energy and spatial resolution, together with time-resolved measurements, provide researchers with valuable insights into the complex mechanisms and dynamics that underlie the behavior of nanostructured materials. The possibility to study materials under operando conditions has been a game-changing development for scientists. By observing materials in 'real-time', researchers can better comprehend how they behave under diverse conditions. This knowledge can then be harnessed to engineer innovative materials possessing customized properties, thereby empowering researchers to fabricate sophisticated nanostructured materials that are more optimally tailored to fulfill specific application requirements.

In the present thematic issue, we seek to underscore the progress of high-brilliance synchrotron radiation and free electron laser sources. Their influence in the development of novel instruments and analysis of nanostructured materials, including their surfaces and interfaces, are topics that will also be covered. We cordially invite contributions discussing the wide spectrum of synchrotron and FEL applications and instrumental advancements. The submitted works may encompass but are not limited to the following themes:

• The use of advanced light sources in probing the structure, dynamics, and properties of nanostructured materials with high spatial and temporal resolutions
• Instrumental developments that enable novel investigations of nanomaterials under operando conditions
• Time-resolved studies of nanomaterials utilizing SR and FEL sources
• Applications of SR and FEL techniques in nanoscience and nanotechnology across diverse research fields
• Theoretical and computational studies that complement experimental work utilizing advanced light sources
• Prospects and opportunities in the field with the advent of next-generation synchrotron and FEL facilities
• Integration of artificial intelligence, data acquisition, and big data analysis techniques in synchrotron radiation and free-electron laser research.

Submission deadline: December 15, 2025

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