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Mannose-Modificated Polyethylenimine: A Specific and Effective Antibacterial Agent against Escherichia coli

18-Jan-2018 | Mei Liu; Jiao Li; Baoxin Li, Langmuir, 2018

Polyethylenimine (PEI) has antimicrobial activity against Gram-positive (Staphylococcus aureus, S. aureus) and Gram-negative (Escherichia coli, E. coli), bacteria but is highly cytotoxic, and the selective antimicrobial activity against S. aureus is obviously better than that against E. coli. To ...


Delicate Control of Multishelled Zn–Mn–O Hollow Microspheres as a High-Performance Anode for Lithium-Ion Batteries

18-Jan-2018 | Jiaying Xu; Hao Zhang; Ruofeng Wang; Peibo Xu; Yinlin Tong; Qingyi Lu; Feng Gao, Langmuir, 2018

Mixed/composite oxides of transition metals with hollow structures, especially multishelled hollow architecture, have promising potential for different applications, but their syntheses still remain a big challenge. Herein, a facile coordination polymer precursor method was developed to construct ...


Localized Three-Dimensional Functionalization of Bionanoreceptors on High-Density Micropillar Arrays via Electrowetting

18-Jan-2018 | Sangwook Chu; Thomas E. Winkler; Adam D. Brown; James N. Culver; Reza Ghodssi, Langmuir, 2018

In this work, we introduce an electrowetting-assisted 3-D biofabrication process allowing both complete and localized functionalization of bionanoreceptors onto densely arranged 3-D microstructures. The integration of biomaterials with 3-D microdevice components offers exciting opportunities for ...


Dual Signaling DNA Electrochemistry: An Approach To Understand DNA Interfaces

18-Jan-2018 | Saimon Moraes Silva; Roya Tavallaie; Vinicius R. Gonçales; Robert H. Utama; Mehran B. Kashi; D. Brynn Hibbert; Richa ..., Langmuir, 2018

Electrochemical DNA biosensors composed of a redox marker modified nucleic acid probe tethered to a solid electrode is a common experimental construct for detecting DNA and RNA targets, proteins, inorganic ions, and even small molecules. This class of biosensors generally relies on the ...


Protein–Substrate Adhesion in Microcontact Printing Regulates Cell Behavior

18-Jan-2018 | Shuhuan Hu; Ting-Hsuan Chen; Yanhua Zhao; Zuankai Wang; Raymond H. W. Lam, Langmuir, 2018

Microcontact printing (μCP) is widely used to create patterns of biomolecules essential for studies of cell mechanics, migration, and tissue engineering. However, different types of μCPs may create micropatterns with varied protein–substrate adhesion, which may change cell behaviors and pose ...


Effect of Plasma Membrane Semipermeability in Making the Membrane Electric Double Layer Capacitances Significant

18-Jan-2018 | Shayandev Sinha; Harnoor Singh Sachar; Siddhartha Das, Langmuir, 2018

Electric double layers (or EDLs) formed at the membrane–electrolyte interface (MEI) and membrane–cytosol interface (MCI) of a charged lipid bilayer plasma membrane develop finitely large capacitances. However, these EDL capacitances are often much larger than the intrinsic capacitance of the ...


Degradation Kinetics during Oxygen Electrocatalysis on Perovskite-Based Surfaces in Alkaline Media

18-Jan-2018 | D. S. Bick; T. B. Krebs; D. Kleimaier; A. F. Zurhelle; G. Staikov; R. Waser; I. Valov, Langmuir, 2018

The oxygen evolution reaction (OER) during alkaline water electrolysis is the bottleneck of water splitting. Perovskite materials have been particularly proposed as good andeconomically reasonable electrocatalysts for the OER, showingpromise and advantages with respect to classic metallic ...


Strain and Bond Length Dynamics upon Growth and Transfer of Graphene by NEXAFS Spectroscopy from First-Principles and Experiment

18-Jan-2018 | W. Y. Rojas; A. D. Winter; J. Grote; S. S. Kim; R. R. Naik; A. D. Williams; C. Weiland; E. Principe; D. A. Fischer; ..., Langmuir, 2018

As the quest toward novel materials proceeds, improved characterization technologies are needed. In particular, the atomic thickness in graphene and other 2D materials renders some conventional technologies obsolete. Characterization technologies at wafer level are needed with enough sensitivity ...


Identification of the Basic Sites on Nitrogen-Substituted Microporous and Mesoporous Silicate Frameworks Using CO2 as a Probe Molecule

17-Jan-2018 | Masaru Ogura; Shin-ya Fukuzawa; Seiichiro Fukunaga; Hiroshi Yamazaki; Junko N. Kondo; Masafumi Morimoto; Remy Guille ..., Langmuir, 2018

Carbon dioxide was shown to identify surface basic properties of nitrogen-substituted microporous and mesoporous silicas, in addition to conventional basic oxides, by a detailed study using isotherm and heat of adsorption measurements as well as by infrared spectroscopy. A hydrogen-bonded weak ...


Roles of Textural and Surface Properties of Nanoparticles in Ultrasound-Responsive Systems

17-Jan-2018 | Qiaofeng Jin; Chih-Yu Lin; Yuan-Chih Chang; Chia-Min Yang; Chih-Kuang Yeh, Langmuir, 2018

Acoustic inertial cavitation (IC) is a crucial phenomenon for many ultrasound (US)-related applications. This study aimed to investigate the roles of textural and surface properties of NPs in IC generation by combining typical IC detection methods with various types of silica model NPs. Acoustic ...


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