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In this lecture, we will discuss how the properties of functional polymers and molecules can be modified by imposing geometrical constraints around them. As the confinement dimensions approach the length scales of the relevant phenomena, the defining characteristics of these materials can be significantly altered. We will provide examples of the modification of key properties in doped conducting polymers, semiconducting polymers, and thermally activated delayed fluorescence systems, within different host matrices such as periodic alumina nanopores, spontaneous patterned-polymer ferroelectrics films, and electrospun fibers. The interplay between confinement and the host matrix is demonstrated in electronic conductivity, emission features, and coupling efficiency. These modifications have important implications for various applications in electronics, optoelectronics, and photonic applications. |