Results 241 to 250 of about 5,035,403 (328)

Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light

Advanced Functional Materials, EarlyView.
A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid, Demeng Feng, Pournima Narayanan, Justin S. Edwards, Manchen Hu, Emma Belliveau, Minjeong Kim, Shenwei Yin, Sanket Deshpande, Chenghao Wan, Linda Pucurimay, David A. Czaplewski, Daniel N. Congreve, Mikhail A. Kats   +13 more
wiley   +1 more source

The Realization of Multidirectional, Free‐Standing 3D Plasmonic Nanostructures via 3D Nanoprinting: A Case Study of Fractal Antennas

Advanced Functional Materials, EarlyView.
Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker, Robert Winkler, Ulrich Hohenester, Evelin Fisslthaler, Daniel Knez, Gerald Kothleitner, Georg Haberfehlner   +6 more
wiley   +1 more source

Ion and Solvent Dynamics in Charged 2D Clay Nanoslits with Unprecedented Ångström‐Precise Slit Height Control

Advanced Functional Materials, EarlyView.
The slit height of fluorohectorite 2D‐nanochannels is tuned with Å‐precision (2.4–250 Å). Slit‐height‐dependent ion and water mobilities are quantified by applying EIS, PFG‐NMR, and SFG‐NMR with MD simulations guiding interpretation. Diffuse properties are investigated with CP‐AFM, MD, and PB.
Max Stevenson, Sandra Pappler, Leonie Kanzler, Aqsa Nisar, Jepsinraj Kakkuzhiyulla Parambath, Markus Rosenstihl, Flora Lebeda, Sebastian Weiß, Georg Papastavrou, Michael Vogel, Jürgen Senker, Josef Breu   +11 more
wiley   +1 more source

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Contact angle measurement and contact angle interpretation

Advances in Colloid and Interface Science, 1999
Recent progress in the correlation of contact angles with solid surface tensions are summarized. The measurements of meaningful contact angles in terms of surface energetics are also discussed. It is shown that the controversy with respect to measurement and interpretation of contact angles are due to the fact that some (or all) of the assumptions made
D.Y. Kwok, A.W. Neumann
openaire   +2 more sources

Contact Angle Measurements

2017
Contact angle has been an important parameter to determine the wetting ability of the polymer membrane surface. Contact angle has gained interest in surface science in regards to its fundamental aspects and application point of view. This chapter will give an insight into fundamentals of contact angle including the theoretical backgrounds, brief ...
Hebbar, R. S., Isloor, A. M., Ismail, A. F.   +2 more
openaire   +2 more sources

Contact angle

Catalysis from A to Z, 2020
semanticscholar   +3 more sources

Thermodynamically consistent phase-field modelling of contact angle hysteresis

Journal of Fluid Mechanics, 2020
In the phase-field description of moving contact line problems, the two-phase system can be described by free energies, and the constitutive relations can be derived based on the assumption of energy dissipation.
P. Yue
semanticscholar   +1 more source

Dynamic contact angles and contact angle hysteresis

Journal of Colloid and Interface Science, 1977
Abstract Contact angles have been measured as a function of the three-phase-boundary velocity. Large velocity effects observed with other techniques were not seen using the plate method. It is possible to relate the dependence of contact angles on velocity to surface heterogeneity.
Rulon E Johnson, Robert H Dettre, Dale A Brandreth   +2 more
openaire   +1 more source

Assessment and Interpretation of Surface Wettability Based on Sessile Droplet Contact Angle Measurement: Challenges and Opportunities

Advanced Materials Interfaces, 2019
Surface wettability, a property that governs the interaction between the solid and liquid phases, is central in various biological systems and technological applications.
Chun Haow Kung, P. Sow, B. Zahiri, W. Mérida   +3 more
semanticscholar   +1 more source

Hydrophilicity and Water Contact Angle on Methylammonium Lead Iodide

Advanced Materials Interfaces, 2018
Surface properties are often assessed with measurements of the contact angle of a water drop. The process is however flawed for the very important class of hybrid perovskite materials, extensively employed in solar cells and optoelectronics research ...
C. Caddeo, D. Marongiu, S. Meloni, A. Filippetti, F. Quochi, M. Saba, A. Mattoni   +6 more
semanticscholar   +1 more source