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Morphology of Fe nanolayers with Pt overlayers on low-temperature annealing

Gong, J.; Paul, N.; Nagy, B.; Dolgos, M.; Bottyán, L.; Müller-Buschbaum, P.; Böni, P.; Zheng, J.-G.; Paul, A.

Customer publications

Morphology of Fe nanolayers with Pt overlayers on low-temperature annealing

Gong, J.; Paul, N.; Nagy, B.; Dolgos, M.; Bottyán, L.; Müller-Buschbaum, P.; Böni, P.; Zheng, J.-G.; Paul, A.

Agglomeration or dewetting is technologically important in the microelectronics industry as it is one of the methods of producing arrays of nanosized metal clusters. This report investigates the grain morphology evolution due to low-temperature annealing (473 K) in Fe layers with Pt overlayers. X-ray diffuse scattering and grazing-incidence small-angle X-ray scattering…
Functionalized Mesoporous Silica via an Aminosilane Surfactant Ion Exchange Reaction: Controlled Scaffold Design and Nitric Oxide Release

Soto, Robert J.; Yang, Lei; Schoenfisch, Mark H.

Customer publications

Functionalized Mesoporous Silica via an Aminosilane Surfactant Ion Exchange Reaction: Controlled Scaffold Design and Nitric Oxide Release

Soto, Robert J.; Yang, Lei; Schoenfisch, Mark H.

, Nitric oxide-releasing mesoporous silica nanoparticles (MSNs) were prepared using an aminosilane-template surfactant ion exchange reaction. Initially, bare silica particles were synthesized under basic conditions in the presence of cetyltrimethylammonium bromide (CTAB). These particles were functionalized with nitric oxide (NO) donor precursors (i.e., secondary amines) via the addition of…
Improving Visible-Light Transparency of Drawn Melt-Crystallized Linear Polyethylenes: Influence of Molecular Weight Distribution

Shen, Lihua; Severn, John; Bastiaansen, Cees W. M.

Customer publications

Improving Visible-Light Transparency of Drawn Melt-Crystallized Linear Polyethylenes: Influence of Molecular Weight Distribution

Shen, Lihua; Severn, John; Bastiaansen, Cees W. M.

A series of drawn melt-crystallized linear polyethylenes (LPEs) with different molecular weight distributions (MWD = Mw/Mn) ranging from 2 to 25 are investigated with respect to the visible-light transparency. The results indicate that the MWD of the LPEs significantly influences the visible-light transparency of drawn melt-crystallized LPEs. At a high…
Structural Study of Four-Armed Amphiphilic Star-Block Copolymers: Pristine and End-Linked Tetronic T1307

Mortensen, Kell; Annaka, Masahiko

Customer publications

Structural Study of Four-Armed Amphiphilic Star-Block Copolymers: Pristine and End-Linked Tetronic T1307

Mortensen, Kell; Annaka, Masahiko

We present a comparative structural study of 30 wt % aqueous suspensions of two related systems based on 4-arm PEO–PPO type of macromolecules (Tetronic T1307, BASF) with the PPO block near the star center. One system concerns the pristine 4-arm PEO–PPO star block copolymer T1307. The second system is a…
Morphology and tensile properties of model thermoplastic polyurethanes with MDI/butanediol based monodisperse hard segments

Ren, Li; Shah, Priyank N.; Faust, Rudolf

Customer publications

Morphology and tensile properties of model thermoplastic polyurethanes with MDI/butanediol based monodisperse hard segments

Ren, Li; Shah, Priyank N.; Faust, Rudolf

Morphology and tensile properties of model thermoplastic polyurethanes (TPUs) containing polyisobutylene (PIB) or poly(tetramethylene oxide) (PTMO) based soft segment and 4,4-methylene bis(phenyl isocyanate) (MDI) and 1,4-butanediol (BDO) based monodisperse hard segments (HSs), consisting of exactly two to four MDI units extended by BDO, were investigated. Using FT-IR spectroscopy, increased…
Ferroelectric switching and electrochemistry of pyrrole substituted trialkylbenzene-1,3,5-tricarboxamides

Meng, Xiao; Gorbunov, Andrey V.; Christian Roelofs, W. S.; Meskers, Stefan C. J.; Janssen, René A. J.; Kemerink, Martijn; Sijbesma, Rint P.

Customer publications

Ferroelectric switching and electrochemistry of pyrrole substituted trialkylbenzene-1,3,5-tricarboxamides

Meng, Xiao; Gorbunov, Andrey V.; Christian Roelofs, W. S.; Meskers, Stefan C. J.; Janssen, René A. J.; Kemerink, Martijn; Sijbesma, Rint P.

We explore a new approach to organic ferroelectric diodes using a benzene-tricarboxamide (BTA) core connected with C10 alkyl chains to pyrrole groups, which can be polymerized to provide a semiconducting ferroelectric material. The compound possesses a columnar hexagonal liquid crystalline (LC) phase and exhibits ferroelectric switching. At low switching frequencies,…
Sequence distribution and elastic properties of propylene-based elastomers

Tsou, Andy H.; Norman, Alexander I.; Lu, Yonglai; Throckmorton, Joseph A.; Hsiao, Benjamin S.

Customer publications

Sequence distribution and elastic properties of propylene-based elastomers

Tsou, Andy H.; Norman, Alexander I.; Lu, Yonglai; Throckmorton, Joseph A.; Hsiao, Benjamin S.

Three iso-specific organometallic catalysts for ethylene and propylene copolymerization with varying r1r2 parameters, i.e., the products of ethylene and propylene reactivity ratios, were utilized to synthesize equal-molecular-weight propylene-based elastomers (PBEs) of alternating, random, and blocky backbone sequences. To compensate for the variations in catalyst iso-specificity and thus to…