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Search Publications by: David J. Vanderah (Assoc)

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Displaying 1 - 19 of 19

A Comparative AFM Study of the Compressibility and Friction of Unmodified and Oligo(ethylene oxide)-Modified Alkane Thiol SAMs on Au(111) Using Nanografting

October 12, 2021
Ying Hu, David J. Vanderah, Guangyao Liu, William J. Price, Milan Mrksich, G Scoles
Self-assembled monolayers (SAMs) terminated with oligo(ethylene glycol) (OEG) segments are known to resist non-specific protein adsorption and are used in biomaterial and biosensor applications. In this report we use an atomic force microscopy (AFM)

Molecular-scale Structural and Functional Characterization of Sparsely Tethered Bilayer Membranes

October 12, 2021
Duncan McGillivray, Gintaras Valincius, David J. Vanderah, W Febo-Ayala, John T. Woodward IV, F Hienrich, John J. Kasianowicz, M Losche
Surface-tethered biomimetic bilayer membranes (tethered lipid bilayer membranes, tBLMs) have been formed on gold surfaces from phospholipids and a synthetic 1-thiahexa(ethy lene oxide) lipid, WC14. They have been characterized using electrochemical

Soluble Amyloid [Beta] Oligomers Affect Dielectric Properties by Membrane Incorporation and Domain Formation: Implications for Cell Toxicity

October 12, 2021
G Valinius, K F. Heinrich, R Budvytye, David J. Vanderah, Y Sokolov, J Hall, M Losche
Water-soluble prefibrillar amyloid b (Ab1 42) oligomers affect model bilayers by greatly reducing the membrane barrier to ion transport, as previously reported for Ab in many papers. However, important signatures of the molecular transport mechanism are

Surface Analytical Kinetic Studies of Noise-Generating Electron Transfer Processes: In Vivo Sensing Properties of Nanoengineered Organic Cardiac Pacing Electrodes in Living Heart

October 12, 2021
H A. Chou, P DaeGynn, David J. Vanderah, M Ovadia
Novel organic cardiac electrode candidates enhanced by self-assembled monolayers (SAMs) are examined by varying rate cyclic voltammogram and impedance spectroscopy with hexacoordinated [Fe(CN)6]-3 as the probe for their susceptibility to Faradaic current

In-plane Homogeneity and Lipid Dynamics in tethered Bilayer Lipid Membranes (tBLMs)

January 1, 2010
Siddharth Shenoy, Radu Moldovan, James Fitzpatrick, David J. Vanderah, Markus Deserno, Mathias Losche
Tethered bilayer lipid membranes (tBLMs) were prepared by the self-assembly of thiolated lipidic anchors on gold films sputtered on Si wafers, followed by phospholipid precipitation via rapid solvent exchange. They were characterized in their in-plane

A Thermodynamic Study of Ketoreductase-Catalyzed Reactions, Part 5. Reduction of Substituted Ketones in n-Hexane

April 1, 2008
Yadu D. Tewari, David J. Vanderah, Michele M. Schantz, Robert N. Goldberg, J D. Rozzell, J F. Liebman, Raymond W. Hui, Yitzy Nissenbaum, Ahmad R. Parniani
The equilibrium constants K for the ketoreductase-catalyzed reduction reactions of 1-benzyl-3-pyrrolidinone, ethyl 2-oxo-4-phenylbutyrate, ethyl 4-chloroacetoacetate, 1-benzyl-4-piperidone, and 1-benzyl-3-piperidone were measured in n-hexane at T = 298.15

The Effect of an Oxidized Gold Substrate on Alkanethiol Self-Assembly

June 1, 2000
John T. Woodward IV, Marlon L. Walker, Curtis W. Meuse, David J. Vanderah, G Poirier, Anne L. Plant
UV cleaned gold substrates incubated in solutions of alkanethiol show islands on the monolayer surface when imaged with non-contact atomic force microscopy (AFM). The height of the islands above the monolayer is approximately twice the height of the

Polyazapolycyclic Caged Polynitramines

February 9, 1998
A T. Nielsen, A P. Chafin, S L. Christian, D W. Moore, M P. Nadler, R A. Nissan, David J. Vanderah, R D. Gilardi, C F. George, J L. Flippen-Anderson