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Structure and Properties of Citrate Overlayers Adsorbed at the Aqueous Au(111) Interface

12-Dec-2014 | Louise B. Wright; P. Mark Rodger; Tiffany R. Walsh, Langmuir, 2014

One of the most common means of gold nanoparticle (AuNP) biofunctionalization involves the manipulation of precursor citrate-capped AuNPs via ligand displacement. However, the molecular-level structural characteristics of the citrate overlayer adsorbed at the aqueous Au interface at neutral pH ...


Influence of Attachment Strategy on the Thermal Stability of Hybridized DNA on Gold Surfaces

12-Dec-2014 | Tyler J. Petty; Caleb E. Wagner; Aric Opdahl, Langmuir, 2014

The thermal stabilities of double-stranded DNA hybrids immobilized on gold surfaces are shown to be significantly affected by the conformation of the hybrid. To analyze this behavior, DNA probes were immobilized using attachment strategies where the nucleotides within the strand had varying ...


Equilibrium Adsorption of Hexahistidine on pH-Responsive Hydrogel Nanofilms

12-Dec-2014 | Gabriel S. Longo; Monica Olvera de la Cruz; Igal Szleifer, Langmuir, 2014

We present a molecular theory to study the adsorption of different species within pH-sensitive hydrogel nanofilms. The theoretical framework allows for a molecular-level description of all the components of the system, and it explicitly accounts for the acid–base equilibrium. We concentrate on ...


Ternary System Based on Fluorophore–Surfactant Assemblies—Cu2+ for Highly Sensitive and Selective Detection of Arginine in Aqueous Solution

11-Dec-2014 | Jianhua Cao; Liping Ding; Wenting Hu; Xiangli Chen; Xiao Chen; Yu Fang, Langmuir, 2014

A new cationic dansyl derivative-based (DIlSD) fluorescence probe was designed and synthesized. Its combination with anionic surfactant SDS assemblies shows enhanced fluorescence intensity and blue-shifted maximum wavelength. Its fluorescence can be slightly quenched by Cu2+; however, the ...


Thickness, Composition, and Molecular Structure of Residual Thin Films Formed by Forced Dewetting of Ag from Glycerol/D2O Solutions

11-Dec-2014 | Jeanne E. Pemberton; Anoma Mudalige; Heemin Yoo, Langmuir, 2014

The thickness, composition, and interfacial molecular structure of residual thin films retained on the surface of polycrystalline Ag substrates after being forcibly dewet from glycerol/D2O solutions are investigated using contact angle measurements, ellipsometry, and polarization ...


Small-Angle Neutron Scattering Studies of Mineralization on BSA Coated Citrate Capped Gold Nanoparticles Used as a Model Surface for Membrane Scaling in RO Wastewater Desalination

11-Dec-2014 | Y. N. Dahdal; V. Pipich; H. Rapaport; Y. Oren; R. Kasher; D. Schwahn, Langmuir, 2014

Bovine serum albumin (BSA) coated on citrate capped gold nanoparticles (BSA-GNPs) was exposed to a simulated wastewater effluent (SSE) in order to study the mineralization and thereby mimic scaling at biofouled membranes of reverse osmosis (RO) wastewater desalination plants. RO is a leading ...


Easily Processable Highly Ordered Langmuir-Blodgett Films of Quaterthiophene Disiloxane Dimer for Monolayer Organic Field-Effect Transistors

09-Dec-2014 | Alexey S. Sizov; Daniil S. Anisimov; Elena V. Agina; Oleg V. Borshchev; Artem V. Bakirov; Maxim A. Shcherbina; Soure ..., Langmuir, 2014

Self-assembly of highly soluble water-stable tetramethyldisiloxane-based dimer of α,α′-dialkylquaterthiophene on the water–air interface was investigated by Langmuir, grazing incidence X-ray diffraction, and X-ray reflectivity techniques. The conditions for formation of very homogeneous ...


Bottom-Up Fabrication of Paper-Based Microchips by Blade Coating of Cellulose Microfibers on a Patterned Surface

08-Dec-2014 | Bingbing Gao; Hong Liu; Zhongze Gu, Langmuir, 2014

We report a method for the bottom-up fabrication of paper-based capillary microchips by the blade coating of cellulose microfibers on a patterned surface. The fabrication process is similar to the paper-making process in which an aqueous suspension of cellulose microfibers is used as the starting ...


Equilibrating Immigration and Anthracene-Maleimide-Based Diels–Alder-Trapping of Octylmaleimide in Mixed Photo-Cross-Linked Polymer Micelles

03-Dec-2014 | Yan Liu; Min Tian; Huan Chang; Jinqiang Jiang; Xiangyang Yan; Zhaotie Liu; Zhongwen Liu, Langmuir, 2014

It is possible that the hydrophobic guest within amphiphilic polymer micelles may leak out and be captured by other species before polymer micelles adhere to the desired focus because of the complexity in an actual release procedure, rendering the reduced efficiency of the nanocarrier system. To ...


Adsorption-Induced Changes in Ribonuclease A Structure and Enzymatic Activity on Solid Surfaces

03-Dec-2014 | Yang Wei; Aby A. Thyparambil; Yonnie Wu; Robert A. Latour, Langmuir, 2014

Ribonuclease A (RNase A) is a small globular enzyme that lyses RNA. The remarkable solution stability of its structure and enzymatic activity has led to its investigation to develop a new class of drugs for cancer chemotherapeutics. However, the successful clinical application of RNase A has been ...


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