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Full-Text Articles in Engineering Science and Materials

Engineering Extracellular Matrix Signals Into Fibrous Hyaluronic Acid Hydrogels, Ryan Joseph Wade Jan 2015

Engineering Extracellular Matrix Signals Into Fibrous Hyaluronic Acid Hydrogels, Ryan Joseph Wade

Publicly Accessible Penn Dissertations

Hydrogels have gained widespread use in biomedical applications for their ability to mimic certain features of the natural extracellular matrix (ECM) including tissue-like mechanics, water-swollen environments, and biodegradability. Despite these advantages, hydrogels typically do not present the fibrous architecture of natural ECM, even though this structure can guide cell behavior and tissue function. With this in mind, the overall goal of this dissertation is the translation of hydrogels from hyaluronic acid (HA) macromers into more complex, fibrous networks with spatiotemporal control. First, HA macromers that contain protease-cleavable and fluorescent peptides were synthesized and shown to form both isotropic hydrogels and ...


Evaluation And Optimization Of Photovoltaic Cells Comprised From Benzodifuran And Benzobisoxazole Based Polymers, Monique Donica Ewan Jan 2015

Evaluation And Optimization Of Photovoltaic Cells Comprised From Benzodifuran And Benzobisoxazole Based Polymers, Monique Donica Ewan

Graduate Theses and Dissertations

Organic solar cells were fabricated from polymers based on benzodifuran and benzobisoxazole. Through optimizations, a maximum power conversion efficiency of 2.89 % was obtained for solar cells fabricated with benzodifuran-based polymers. Through similar optimizations, a maximum power conversion efficieny of 2.78% was obtained for solar cells fabricated with benzobisoxazole-based polymers.