Browsing Materials Science & Technology by Author "Karim, Alamgir"
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Dual Imprinted Polymer Thin Films via Pattern Directed Self-Organization
Grolman, Danielle; Dbandyopadhyay, iya; Al-Enizi, Abdullah; Elzatahry, Ahmed; Karim, Alamgir ( American Chemical Society , 2017 , Article)Synthetic topographically patterned films and coatings are typically contoured on one side, yet many of nature's surfaces have distinct textures on different surfaces of the same object. Common examples are the top and ... -
Facile Assembly of Aligned Magnetic Nanoparticle Chains in Polymer Nanocomposite Films by Magnetic Flow Coating
Yuan, Hongyi; Zvonkina, Irina J.; Al-Enizi, Abdullah M.; Elzatahry, Ahmed A.; Pyun, Jeffrey; Karim, Alamgir... more authors ... less authors ( American Chemical Society , 2017 , Article)Magnetic nanoparticle chains are found in biosystems, such as in the brain of migratory birds. Inspired by natural assemblies, in a novel approach, the facile assembly of magnetically aligned polymer grafted cobalt ... -
Nanoclay compatibilization of phase separated polysulfone/polyimide films for oxygen barrier
Ammar, Ali; Elzatahry, Ahmed; Al-Maadeed, Mariam; Alenizi, Abdullah M.; Huq, Abul F.; Karim, Alamgir... more authors ... less authors ( Elsevier Ltd , 2017 , Article)Polyimide (PI) and Polysulfone (PSF) films are used in many applications ranging from electronic film capacitors to membranes for gas separation and water purification, yet their phase separation issues limit many potential ... -
Soft-shear induced phase-separated nanoparticle string-structures in polymer thin films
Zhang, Ren; Lee, Bongjoon; Bockstaller, Michael R.; Al-Enizi, Abdullah M.; Elzatahry, Ahmed; Berry, Brian C.; Karim, Alamgir... more authors ... less authors ( Royal Society of Chemistry , 2016 , Article)Application of shear stress has been shown to unidirectionally orient the microstructures of block copolymers and polymer blends. In the present work, we study the phase separation of a novel nanoparticle (NP)-polymer blend ... -
Vertical orientation of solvent cast nanofilled PS-b-PEO block copolymer thin films at high nanoparticle loading
Huq, Abul F.; Kulkarni, Manish; Modi, Arvind; Smilgies, Detlef-M.; Al-Enizi, Abdullah M.; Elzatahry, Ahmed; Raghavan, Dharmaraj; Karim, Alamgir... more authors ... less authors ( Elsevier Ltd , 2016 , Article)We demonstrate selective dispersion of photosensitive electron acceptor phenyl-C61-butyric acid methyl ester (PCBM) in cylinder forming polystyrene-b-poly (ethylene oxide) (PS-b-PEO) block copolymer (BCP). Neat PS-b-PEO ...