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Self-Assembled Monolayer-Assisted Negative Lithography

27-Feb-2015 | Xiaoyan Mu; Aiting Gao; Dehui Wang; Peng Yang, Langmuir, 2015

Self-assembled monolayers (SAMs) have been widely employed as etching resists in wet lithography systems to form patterns in which the ordered molecular packing of the SAM regions significantly delays the etchant attack. A generally accepted recognition is that the SAMs ability to resist etching ...


Temperature-Dependent Infrared and Calorimetric Studies on Arsenicals Adsorption from Solution to Hematite Nanoparticles

27-Feb-2015 | Md Abdus Sabur; Sabine Goldberg; Adrian Gale; Nadine Kabengi; Hind A. Al-Abadleh, Langmuir, 2015

To address the lack of systematic and surface sensitive studies on the adsorption energetics of arsenic compounds on metal (oxyhydr)oxides, we conducted temperature-dependent ATR-FTIR studies for the adsorption of arsenate, monomethylarsonic acid, and dimethylarsinic acid on hematite ...


Reversible Modification of Structure and Properties of Cellulose Nanofibril-Based Multilayered Thin Films Induced by Postassembly Acid Treatment

27-Feb-2015 | Firas Azzam; Céline Moreau; Fabrice Cousin; Alain Menelle; Hervé Bizot; Bernard Cathala, Langmuir, 2015

A postassembly acid-treatment consisting of an immersion in 5 mM HCl solution was applied to carboxylated cellulose nanofibrils (CNF)–poly(allylamine) hydrochloride (PAH) multilayered thin films. Our results show that the treatment did not affect the overall thickness of the films without any ...


Preparation of Compact Nanoparticle Clusters from Polyethylene Glycol-Coated Gold Nanoparticles by Fine-Tuning Colloidal Interactions

26-Feb-2015 | Dániel Zámbó; György Z. Radnóczi; András Deák, Langmuir, 2015

Low-molecular weight polyethylene glycol (PEG) has a lower critical solution temperature well outside the boiling point of water at ambient pressure, but it can be reduced at high ionic strengths. We extend this concept to trigger the clustering of gold nanoparticles through the control of ...


The Role of Modifying Molecular Chains in the Formation of Organized Molecular Films of Organo-Modified Nanodiamond: Construction of a Highly Ordered Low Defect Particle Layer and Evaluation of Desorption Behavior of Organic Chains

25-Feb-2015 | Atsuhiro Fujimori; Yusuke Kasahara; Nanami Honda; Shuichi Akasaka, Langmuir, 2015

The role of organo-modifying molecular chains in the formation of molecular films of organo-modified nanodiamond is discussed herein based on interfacial chemical particle integration of organo-modified nanodiamond having a particle size of 5 nm. The surface of nanodiamond is known to be covered ...


Photopatterning of Stable, Low-Density, Self-Assembled Monolayers on Gold

25-Feb-2015 | Leila Safazadeh; Brad J. Berron, Langmuir, 2015

Photoinitiated thiol–yne chemistry is utilized as a click reaction for grafting of acid-terminated alkynes to thiol-terminated monolayers on a gold substrate to create stable, low-density monolayers. The resulting monolayers are compared with a well-packed 11-mercaptoundecanoic acid monolayer and ...


Large-Scale Plasma Patterning of Transparent Graphene Electrode on Flexible Substrates

25-Feb-2015 | Ji Hye Kim; Euna Ko; Joonki Hwang; Xuan-Hung Pham; Joo Heon Lee; Sung Hwan Lee; Van-Khue Tran; Jong-Ho Kim; Jin-Goo ..., Langmuir, 2015

Graphene, a two-dimensional carbon material, has attracted significant interest for applications in flexible electronics as an alternative transparent electrode to indium tin oxide. However, it still remains a challenge to develop a simple, reproducible, and controllable fabrication technique for ...


Stimuli-Responsive and Hemocompatible Pseudozwitterionic Interfaces

24-Feb-2015 | Antoine Venault; Yong-Sheng Zheng; Arunachalam Chinnathambi; Sulaiman Ali Alharbi; Hsin-Tsung Ho; Yu Chang; Yung Chang, Langmuir, 2015

We report a novel biomacromolecular formula for the design of hemocompatible gel interfaces of N-isopropylacrylamide (NIPAAm) and mixed-charge pairs of [2-(methacryloyloxy)ethyl]trimethylammonium (TMA) and 3-sulfopropyl methacrylate (SA) with overall electrical neutrality. The study stresses on ...


Nile Red Dye in Aqueous Surfactant and Micellar Solution

24-Feb-2015 | Indah Nurita Kurniasih; Hua Liang; Parveen Choudhary Mohr; Gaurang Khot; Jürgen P. Rabe; Andreas Mohr, Langmuir, 2015

The solubilization behavior of nile red dye in aqueous surfactant and micellar solutions was studied by optical spectroscopic techniques, dynamic light scattering, and atomic force microscopy. Nile red exhibits considerable absorption in the submicellar concentration region. When dispersed in ...


Toward Ion-Free Polyelectrolyte Multilayers: Cyclic Salt Annealing

22-Feb-2015 | Hadi M. Fares; Yara E. Ghoussoub; Richard L. Surmaitis; Joseph B. Schlenoff, Langmuir, 2015

Polyelectrolyte multilayers (PEMUs) are made from various combinations of polyanions and polycations. It is now understood that these ultrathin films of polyelectrolyte complex may also incorporate counterions derived from the solutions from which the PEMU was deposited or exchanged into the film ...


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