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Engineering Polyelectrolyte Capsules with Independently Controlled Size and Shape

26-Jun-2015 | Xingjie Zan; Anusha Garapaty; Julie A. Champion, Langmuir, 2015

Polyelectrolyte capsules (PECs) are a promising delivery system that has the ability to carry a large payload of a variety of cargoes. Controlling PEC properties is critical to understanding and tuning their cellular uptake efficiency, kinetics, and mechanism as well as their biodistribution in ...

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Importance of Internal Porosity for Glucan Adsorption in Mesoporous Carbon Materials

26-Jun-2015 | Po-Wen Chung; Alexandre Charmot; Timothy Click; Yuchun Lin; YounJue Bae; Jhih-Wei Chu; Alexander Katz, Langmuir, 2015

To better understand the adsorption of long-chain poly(1 → 4)-β-d-glucans on carbon surfaces as well as interactions responsible for this adsorption, we use a comparative study involving mesoporous carbon–silica composite materials that have been etched to varying degrees and all-atom molecular ...

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Celecoxib Encapsulation in β-Casein Micelles: Structure, Interactions, and Conformation

24-Jun-2015 | Tanya Turovsky; Rafail Khalfin; Shifi Kababya; Asher Schmidt; Yechezkel Barenholz; Dganit Danino, Langmuir, 2015

β-Casein is a 24 kDa natural protein that has an open conformation and almost no folded or secondary structure, and thus is classified as an intrinsically unstructured protein. At neutral pH, β-casein has an amphiphilic character. Therefore, in contrast to most unstructured proteins that remain ...

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Synthesis of Absorption-Dominant Small Gold Nanorods and Their Plasmonic Properties

24-Jun-2015 | Henglei Jia; Caihong Fang; Xiao-Ming Zhu; Qifeng Ruan; Yi-Xiang J. Wang; Jianfang Wang, Langmuir, 2015

Absorption-dominant small Au nanorods with diameters of less than 10 nm are prepared using a facile seed-mediated growth method. The diameters of the small gold nanorods range from 6 to 9 nm, and their lengths vary from 16 to 45 nm. Their aspect ratios can be tailored from 2.7 to 4.7. As a ...

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Universal Method to Transfer Membrane-Templated Nano-Objects to Aqueous Solutions

23-Jun-2015 | Saghi Saghazadeh; Shouwei Zhang; Damien Lefèvre; Aurélie Le Beulze; Alain M. Jonas; Sophie Demoustier-Champagne, Langmuir, 2015

A wide range of nano-objects are synthesized by combining template synthesis, using polycarbonate membrane as template, with different material deposition methods. The resulting nanostructures varied from robust inorganic gold nanowires grown by electrodeposition to rigid polypyrrole nanotubes ...

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Chemical Bath Deposition of Aluminum Oxide Buffer on Curved Surfaces for Growing Aligned Carbon Nanotube Arrays

22-Jun-2015 | Haitao Wang; Chongzheng Na, Langmuir, 2015

Direct growth of vertically aligned carbon nanotube (CNT) arrays on substrates requires the deposition of an aluminum oxide buffer (AOB) layer to prevent the diffusion and coalescence of catalyst nanoparticles. Although AOB layers can be readily created on flat substrates using a variety of ...

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Morphological Control of Anisotropic Self-Assemblies from Alternating Poly(p-dioxanone)-poly(ethylene glycol) Multiblock Copolymer Depending on the Combination Effect of Crystallization and Micellization

19-Jun-2015 | Mei-Jia Wang; Hao Wang; Si-Chong Chen; Cheng Chen; Ya Liu, Langmuir, 2015

A novel and facile method was developed for morphological controlling of self-assemblies prepared by crystallization induced self-assembly of crystalline-coil copolymer depending on the combination effect of crystallization and micellization. The morphological evolution of the self-assemblies of ...

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Electrostatic Stabilized InP Colloidal Quantum Dots with High Photoluminescence Efficiency

19-Jun-2015 | Anush N. Mnoyan; Artavazd Gh. Kirakosyan; Hyunki Kim; Ho Seong Jang; Duk Young Jeon, Langmuir, 2015

Electrostatically stabilized InP quantum dots (QDs) showing a high luminescence yield of 16% without any long alkyl chain coordinating ligands on their surface are demonstrated. This is achieved by UV-etching the QDs in the presence of fluoric and sulfuric acids. Fluoric acid plays a critical ...

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What Controls the “Off/On Switch” in the Toehold-Mediated Strand Displacement Reaction on DNA Conjugated Gold Nanoparticles?

19-Jun-2015 | Dongbao Yao; Bei Wang; Shiyan Xiao; Tingjie Song; Fujian Huang; Haojun Liang, Langmuir, 2015

In DNA dynamic nanotechnology, a toehold-mediated DNA strand-displacement reaction has demonstrated its capability in building complex autonomous system. In most cases, the reaction is performed in pure DNA solution that is essentially a one-phase system. In the present work, we systematically ...

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Electric Interfacial Layer of Modified Cellulose Nanocrystals in Aqueous Electrolyte Solution: Predictions by the Molecular Theory of Solvation

18-Jun-2015 | Olga Lyubimova; Stanislav R. Stoyanov; Sergey Gusarov; Andriy Kovalenko, Langmuir, 2015

The X-ray crystal structure-based models of Iα cellulose nanocrystals (CNC), both pristine and containing surface sulfate groups with negative charge 0–0.34 e/nm2 produced by sulfuric acid hydrolysis of softwood pulp, feature a highly polarized “crystal-like” charge distribution. We perform ...

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