TY - JOUR AU - Yang, Yu AU - Huang, Jingyuan AU - Dornbusch, Daniel AU - Grundmeier, Guido AU - Fahmy, Karim AU - Keller, Adrian AU - Cheung, David L. ID - 32432 JF - Langmuir KW - Electrochemistry KW - Spectroscopy KW - Surfaces and Interfaces KW - Condensed Matter Physics KW - General Materials Science SN - 0743-7463 TI - Effect of Surface Hydrophobicity on the Adsorption of a Pilus-Derived Adhesin-like Peptide VL - 38 ER - TY - JOUR AB - A two-step seeded-growth method was refined to synthesize Au@Pd core@shell nanoparticles with thin Pd shells, which were then deposited onto alumina to obtain a supported Au@Pd/Al2O3 catalyst active for prototypical CO oxidation. By the strict control of temperature and Pd/Au molar ratio and the use of l-ascorbic acid for making both Au cores and Pd shells, a 1.5 nm Pd layer is formed around the Au core, as evidenced by transmission electron microscopy and energy-dispersive spectroscopy. The core@shell structure and the Pd shell remain intact upon deposition onto alumina and after being used for CO oxidation, as revealed by additional X-ray diffraction and X-ray photoemission spectroscopy before and after the reaction. The Pd shell surface was characterized with in situ infrared (IR) spectroscopy using CO as a chemical probe during CO adsorption–desorption. The IR bands for CO ad-species on the Pd shell suggest that the shell exposes mostly low-index surfaces, likely Pd(111) as the majority facet. Generally, the IR bands are blue-shifted as compared to conventional Pd/alumina catalysts, which may be due to the different support materials for Pd, Au versus Al2O3, and/or less strain of the Pd shell. Frequencies obtained from density functional calculations suggest the latter to be significant. Further, the catalytic CO oxidation ignition-extinction processes were followed by in situ IR, which shows the common CO poisoning and kinetic behavior associated with competitive adsorption of CO and O2 that is typically observed for noble metal catalysts. AU - Feng, Yanyue AU - Schaefer, Andreas AU - Hellman, Anders AU - Di, Mengqiao AU - Härelind, Hanna AU - Bauer, Matthias AU - Carlsson, Per-Anders ID - 40984 IS - 42 JF - Langmuir KW - Electrochemistry KW - Spectroscopy KW - Surfaces and Interfaces KW - Condensed Matter Physics KW - General Materials Science SN - 0743-7463 TI - Synthesis and Characterization of Catalytically Active Au Core─Pd Shell Nanoparticles Supported on Alumina VL - 38 ER - TY - JOUR AU - Prihoda, Annemarie AU - Will, Johannes AU - Duchstein, Patrick AU - Becit, Bahanur AU - Lossin, Felix AU - Schindler, Torben AU - Berlinghof, Marvin AU - Steinrück, Hans-Georg AU - Bertram, Florian AU - Zahn, Dirk AU - Unruh, Tobias ID - 23608 JF - Langmuir SN - 0743-7463 TI - Interface between Water–Solvent Mixtures and a Hydrophobic Surface VL - 36 ER - TY - JOUR AU - Schwiderek, Sabrina AU - Orive, Alejandro G. AU - Karimi Aghda, Soheil AU - Schneider, Jochen M. AU - de los Arcos de Pedro, Maria Teresa AU - Grundmeier, Guido ID - 22534 JF - Langmuir SN - 0743-7463 TI - Single-Molecule Desorption Studies of Poly(acrylic acid) at Electrolyte/Oxide/TiAlN Interfaces ER - TY - JOUR AU - Niederhausen, Jens AU - MacQueen, Rowan W. AU - Lips, Klaus AU - Aldahhak, Hazem AU - Schmidt, Wolf Gero AU - Gerstmann, Uwe ID - 19193 JF - Langmuir SN - 0743-7463 TI - Tetracene Ultrathin Film Growth on Hydrogen-Passivated Silicon ER - TY - JOUR AU - Hämisch, Benjamin AU - Büngeler, Anne AU - Kielar, Charlotte AU - Keller, Adrian AU - Strube, Oliver AU - Huber, Klaus ID - 22652 JF - Langmuir SN - 0743-7463 TI - Self-Assembly of Fibrinogen in Aqueous, Thrombin-Free Solutions of Variable Ionic Strengths VL - 35 ER - TY - JOUR AU - Carl, Nico AU - Müller, Wenke AU - Schweins, Ralf AU - Huber, Klaus ID - 41822 IS - 1 JF - Langmuir KW - Electrochemistry KW - Spectroscopy KW - Surfaces and Interfaces KW - Condensed Matter Physics KW - General Materials Science SN - 0743-7463 TI - Controlling Self-Assembly with Light and Temperature VL - 36 ER - TY - JOUR AU - Hämisch, Benjamin AU - Büngeler, Anne AU - Kielar, Charlotte AU - Keller, Adrian AU - Strube, Oliver AU - Huber, Klaus ID - 41828 IS - 37 JF - Langmuir KW - Electrochemistry KW - Spectroscopy KW - Surfaces and Interfaces KW - Condensed Matter Physics KW - General Materials Science SN - 0743-7463 TI - Self-Assembly of Fibrinogen in Aqueous, Thrombin-Free Solutions of Variable Ionic Strengths VL - 35 ER - TY - JOUR AU - Rüdiger, Arne A. AU - Brassat, Katharina AU - Lindner, Jörg K. N. AU - Bremser, Wolfgang AU - Strube, Oliver I. ID - 25305 JF - Langmuir SN - 0743-7463 TI - Easily Accessible Protein Nanostructures via Enzyme Mediated Addressing ER - TY - JOUR AB - DNA origami nanostructures are versatile substrates for the controlled arrangement of molecular capture sites with nanometer precision and thus have many promising applications in singlemolecule bioanalysis. Here, we investigate the adsorption of DNA origami nanostructures in nanohole arrays which represent an important class of biosensors and may benefit from the incorporation of DNA origami-based molecular probes. Nanoholes with well-defined diameter that enable the adsorption of single DNA origami triangles are fabricated in Au films on Siwafers by nanosphere lithography. The efficiency of directed DNA origami adsorption on the exposed SiO2 areas at the bottoms of the nanoholes is evaluated in dependence of various parameters, i.e., Mg2+ and DNA origami concentrations, buffer strength, adsorption time, and nanohole diameter. We observe that the buffer strength has a surprisingly strong effect on DNA origami adsorption in the nanoholes and that multiple DNA origami triangles with 120 nm edge length can adsorb in nanoholes as small as 120 nm in diameter. We attribute the latter observation to the low lateral mobility of once adsorbed DNA origami on the SiO2 surface, in combination with parasitic adsorption to the Au film. While parasitic adsorption can be suppressed by modifying the Au film with a hydrophobic self-assembled monolayer, the limited surface mobility of the adsorbed DNA origami still leads to poor localization accuracy in the nanoholes and results in many DNA origami crossing the boundary to the Au film even under optimized conditions. We discuss possible ways to minimize this effect by varying the composition of the adsorption buffer, employing different fabrication conditions, or using other substrate materials for nanohole array fabrication. AU - Brassat, Katharina AU - Ramakrishnan, Saminathan AU - Bürger, Julius AU - Hanke, Marcel AU - Doostdar, Mahnaz AU - Lindner, Jörg AU - Grundmeier, Guido AU - Keller, Adrian ID - 3912 JF - Langmuir SN - 0743-7463 TI - On the Adsorption of DNA Origami Nanostructures in Nanohole Arrays ER - TY - JOUR AU - Brassat, Katharina AU - Ramakrishnan, Saminathan AU - Bürger, Julius AU - Hanke, Marcel AU - Doostdar, Mahnaz AU - Lindner, Jörg AU - Grundmeier, Guido AU - Keller, Adrian ID - 22664 JF - Langmuir SN - 0743-7463 TI - On the Adsorption of DNA Origami Nanostructures in Nanohole Arrays VL - 34 ER - TY - JOUR AU - Hajiraissi, Roozbeh AU - Hanke, Marcel AU - Yang, Yu AU - Duderija, Belma AU - Gonzalez Orive, Alejandro AU - Grundmeier, Guido AU - Keller, Adrian ID - 22667 JF - Langmuir SN - 0743-7463 TI - Adsorption and Fibrillization of Islet Amyloid Polypeptide at Self-Assembled Monolayers Studied by QCM-D, AFM, and PM-IRRAS VL - 34 ER - TY - JOUR AU - Kuczera, Stefan AU - Gentile, Luigi AU - Brox, Timothy I. AU - Olsson, Ulf AU - Schmidt, Claudia AU - Galvosas, Petrik ID - 5971 IS - 28 JF - Langmuir SN - 0743-7463 TI - Multilamellar Vesicle Formation Probed by Rheo-NMR and Rheo-SALS under Large Amplitude Oscillatory Shear VL - 34 ER - TY - JOUR AB - Site-specific formation of nanoscaled protein structures is a challenging task. Most known structuring methods are either complex and hardly upscalable or do not apply to biological matter at all. The presented combination of enzyme mediated autodeposition and nanosphere lithography provides an easy-to-apply approach for the buildup of protein nanostructures over a large scale. The key factor is the tethering of enzyme to the support in designated areas. Those areas are provided via prepatterning of enzymatically active antidots with variable diameters. Enzymatically triggered protein addressing occurs exclusively at the intended areas and continues until the entire active area is coated. After this, the reaction self-terminates. The major advantage of the presented method lies in its easy applicability and upscalability. Large area structuring of entire support surfaces with features on the nanometer scale is performed efficiently and without the necessity of harsh conditions. These are valuable premises for large-scale applications with potentials in biosensor technology, nanoelectronics, and life sciences. AU - Rüdiger, Arne A. AU - Brassat, Katharina AU - Lindner, Jörg AU - Bremser, Wolfgang AU - Strube, Oliver I. ID - 3925 IS - 14 JF - Langmuir SN - 0743-7463 TI - Easily Accessible Protein Nanostructures via Enzyme Mediated Addressing VL - 34 ER - TY - JOUR AU - Stolzenburg, Pierre AU - Hämisch, Benjamin AU - Richter, Sebastian AU - Huber, Klaus AU - Garnweitner, Georg ID - 41830 IS - 43 JF - Langmuir KW - Electrochemistry KW - Spectroscopy KW - Surfaces and Interfaces KW - Condensed Matter Physics KW - General Materials Science SN - 0743-7463 TI - Secondary Particle Formation during the Nonaqueous Synthesis of Metal Oxide Nanocrystals VL - 34 ER - TY - JOUR AU - Büngeler, Anne AU - Hämisch, Benjamin AU - Huber, Klaus AU - Bremser, Wolfgang AU - Strube, Oliver I. ID - 25306 JF - Langmuir SN - 0743-7463 TI - Insight into the Final Step of the Supramolecular Buildup of Eumelanin ER - TY - JOUR AU - Kley, M. AU - Kempter, A. AU - Boyko, V. AU - Huber, Klaus ID - 41836 IS - 24 JF - Langmuir KW - Electrochemistry KW - Spectroscopy KW - Surfaces and Interfaces KW - Condensed Matter Physics KW - General Materials Science SN - 0743-7463 TI - Silica Polymerization from Supersaturated Dilute Aqueous Solutions in the Presence of Alkaline Earth Salts VL - 33 ER - TY - JOUR AU - Büngeler, Anne AU - Hämisch, Benjamin AU - Huber, Klaus AU - Bremser, Wolfgang AU - Strube, Oliver I. ID - 41835 IS - 27 JF - Langmuir KW - Electrochemistry KW - Spectroscopy KW - Surfaces and Interfaces KW - Condensed Matter Physics KW - General Materials Science SN - 0743-7463 TI - Insight into the Final Step of the Supramolecular Buildup of Eumelanin VL - 33 ER - TY - JOUR AU - Hajiraissi, Roozbeh AU - Giner, Ignacio AU - Grundmeier, Guido AU - Keller, Adrian ID - 22671 JF - Langmuir SN - 0743-7463 TI - Self-Assembly, Dynamics, and Polymorphism of hIAPP(20–29) Aggregates at Solid–Liquid Interfaces VL - 33 ER - TY - JOUR AU - Teschome, B AU - Facsko, S AU - Schönherr, T AU - Kerbusch, J AU - Keller, Adrian AU - Erbe, A ID - 22673 IS - 40 JF - Langmuir SN - 0743-7463 TI - Temperature-Dependent Charge Transport through Individually Contacted DNA Origami-Based Au Nanowires. VL - 32 ER -