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You searched on: Author: daniel fischer

Displaying records 21 to 30 of 210 records.
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21. Asphaltene Adsorption onto Self-Assembled Monolayers of Mixed Aromatic and Aliphatic Trichlorosilanes
Published: 6/2/2009
Authors: Daniel A Fischer, Saloman Turgman-Cohen, Mathew Smith, P K Kilpatrick, Jan Genzer
Abstract: The adsorption of asphaltenes onto flat solid surfaces modified with mixed self-assembled monolayers (SAMs) of aliphatic and aromatic trichlorosilanes with varying wettabilities, aromaticities, and thicknesses is tested. The mixed SAMs are characte ...

22. Determination of the Electron Escape Depth for NEXAFS Spectroscopy
Published: 6/2/2009
Authors: Daniel A Fischer, K E Sohn, M D Dimitriou, Jan Genzer, C Hawker, E. J Kramer
Abstract: Depth profiling using near-edge X-ray absorption fine structure (NEXAFS) spectroscopy was used to determine the carbon atom density as a function of depth by analyzing the post-edge signal in NEXAFS spectra. We show that the common assumption in the ...

23. Modification of PET surfaces with self-assembled monolayers of organosilane precursors
Published: 5/13/2009
Authors: Daniel A Fischer, Ali Ozcam, Kirill Effimenko, Cherno Jaye, Richard Spontak, Jan Genzer
Abstract: We report on a facile, robust and rapid method by which poly(ethylene terephthalate) (PET) surfaces can be chemically modified while avoiding chemical degradation. Specifically, we demonstrate that brief exposure of PET surfaces to ultraviolet/ozone ...

24. Near Edge X-Ray Absorption Fine Structure Spectroscopy Studies of Single-Crystalline V2O5 Nanowire Arrays
Published: 5/7/2009
Authors: Daniel A Fischer, J Velasquez, Cherno Jaye, S Banerjee
Abstract: Near edge X-ray absorption fine structure (NEXAFS) spectroscopy is used to precisely probe the alignment, uniformity in crystal growth direction, and electronic structure of single-crystalline V2O5 nanowire arrays prepared by a cobalt-catalyzed vapor ...

25. Synthesis, Structural Characterization, and Electronic Structure of Single-Crystalline CuxV2O5 Nanowires
Published: 4/6/2009
Authors: Daniel A Fischer, C Patridge, Cherno Jaye, H Zhang, Amy Marschilok, E Takeuchi, S Banerjee
Abstract: Single-crystalline copper vanadium oxide nanowires β'-CuxV2O5 (x ~ 0.60) have been synthesized by the hydrothermal reduction of bulk CuV2O6 using small-molecule aliphatic alcohols as reducing agents. The prepared copper vanadium bronze nanow ...

26. Elastic and adhesive properties of alkanethiol self-assembled monolayers on gold
Published: 3/30/2009
Authors: Frank W DelRio, Cherno Jaye, Daniel A Fischer, Robert Francis Cook
Abstract: Elastic and adhesive properties of alkanethiol (CH3(CH2)n 1SH) self-assembled monolayers on gold are investigated by atomic force microscopy and correlated with surface structure via near edge x-ray absorption fine structure spectroscopy. As the cha ...

27. Semiconducting Thienothiophene Copolymers: Design, Synthesis, Morphology and Performance in Thin Film Organic Transistors
Published: 3/1/2009
Authors: Iain McCulloch, Martin Heeney, Michael L. Chabinyc, Dean M DeLongchamp, Regis J Kline, Michael Colle, Warren Duffy, Daniel A Fischer, David J Gundlach, Behrang H Hamadani, Rick Hamilton, Lee J Richter, Alberto Salleo, Martin Shkunov, David Sparrowe, Steve Tierney, Weimin Zhang
Abstract: Organic semiconductors are emerging as a viable alternative to amorphous silicon in a range of thin film transistor devices. , With the possibility to formulate these p-type materials as inks and subsequently print into patterned devices, organic bas ...

28. The molecular basis of mesophase ordering in a thiophene-based copolymer
Published: 2/18/2009
Authors: Dean M DeLongchamp, Regis J Kline, Youngsuk Jung, Eric K Lin, Daniel A Fischer, David J Gundlach, Andrew Moad, Lee J Richter, Michael F. Toney, Martin Heeney, Iain McCulloch
Abstract: The carrier mobility of poly(2,5-bis(3-alkylthiophen-2-yl) thieno[3,2-b]thiophene) semiconductors can be substantially enhanced after heating through a thermotropic mesophase transition, which causes a significant improvement in thin film structural ...

29. Surface Engineering of Styrene/PEGylated-Fluoroalkyl Styrene Block Copolymer Thin Films
Published: 1/1/2009
Authors: Elisa Martinelli, Sara Menghetti, Giancarlo Galli, Antonella Glisenti, Sitaraman Krishnan, Marvin Y. Paik, Christopher K. Ober, Detlet-M Smilgies, Daniel A Fischer
Abstract: A series of diblock copolymers prepared from styrenic monomers was synthesized using ATRP. One block was derived from styrene while the second block was prepared from a styrene modified with an amphiphilic PEGylated-fluoroalkyl side chain. The surf ...

30. Electronic Structure and Chemistry of Iron-Based Metal Oxide Nanostructured Materials: A NEXAFS Investigation of BiFeO3, Bi2Fe4O9, a-Fe2O3, g-Fe2O3, and Fe/Fe3O4
Published: 11/6/2008
Authors: Tae-Jin Park, S Sambasivan, Daniel A Fischer, R Ramesh, J A Misewich, S S Wong
Abstract: We present a systematic and detailed Near Edge X-ray Absorption Fine Structure (NEXAFS) experimental investigation of the electronic structure and chemistry of iron-based metal oxide nanostructured (FeMONS) materials including BiFeO3, Bi2Fe4O9, a-Fe2 ...

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