The influence of graphene and retinoic acid (RA) - a π-conjugated organic semiconductor - interface on their hybrid system is investigated. The physical properties of the interface are assessed via scanning probe microscopy, optical spectroscopy (photoluminescence and Raman) and ab initio calculations. The graphene/RA interaction induces the formation of a well-organized π-conjugated self-assem...

An understanding of the photochemical and photo-physical processes, which occur during photopolymerization is of extreme importance when attempting to improve a photopolymer material's performance for a given application. Recent work carried out on the modelling of the mechanisms which occur in photopolymers during- and post-exposure, has led to the development of a tool, which can be used to p...

Intense terahertz em itters are one of the most important components of terahertz (THz) time-domain spectroscopy systems. In this presented report, the development of THz emitters over the last two decades is reviewed, and an outlook for future THz emitters is given. The physical principle behind the THz generation process is discussed for two types of emitters: state-of-the-art large-area phot...

In Flux, an application for digital photo collections, we provide methods for organizing and sharing photos in a convenient manner based on real-world physical interaction on a tabletop system. Additionally, the system supports four different orders based on quality, time, similarity and a combination of the latter two. The problem of scalability, which is especially relevant for a real-world s...

People’s identities (i.e., who they are) are increasingly performed in both physical and digital spaces. Individuals become cyborgs as they extend their presence and bodily senses through digital bodies (e.g., social media profiles, blog posts and avatars). To gain insight into how people make sense of who they are in the face of their digital extensions, a photo-diary method is advanced in thi...

This work describes an intriguing strategy for the creation of arbitrarily shaped hydrogels utilizing a self-healing template (SHT). A SHT was loaded with a photo-crosslinkable monomer, PEG diacrylate (PEGDA), and then ultraviolet light (UV) crosslinked after first shaping. The SHT template was removed by simple washing with water, leaving behind the hydrogel in the desired physical shape. A hi...

Discovery of Green Fluorescent Protein (GFP) constituted an important improvement for living cell studies on submicron resolution allowing in vivo fluorescence labeling. We studied the photo-physical properties of single GFP molecules incorporated in a charged polyelectrolyte environment by means of single molecule spectroscopy. The fluorescence characteristics change dramatically in terms of p...

We present original characterizations of photo-radio-darkening in ytterbium-doped silica optical fibers submitted to the simultaneous action of the pump and of an ionizing radiation. We present the interplay between both radiations, showing e.g. that the pump is able to darken or bleach the fiber depending on the ionizing dose. The photoresistance of the fiber is shown to play a crucial role on...

In the study of developmental biology, the physical properties and constraints of the developing tissues are of great importance. In spite of this, not much is known about the elastic properties of biologically relevant tissues that are studied in biology labs. Here, we characterize properties of the wing imaginal disc of Drosophila, which is a precursor organ intensely studied in the framework...

Background. The transnational young people’s physical activity participation could intermingle with their ingrained dispositions acquired from their pre-migrating periods, experiences of transnational mobility, new cultural learning, and other migration processes.  Objectives. The current study aimed to investigate transnational youth’s physical activity experience using photo-elicitation inte...