Results 11 to 20 of about 366,753 (293)

Ultrathin van der Waals Metalenses [PDF]

open access: yesNano Letters, 2018
Ultrathin and flat optical lenses are essential for modern optical imaging, spectroscopy, and energy harvesting. Dielectric metasurfaces comprising nanoscale quasi-periodic resonator arrays are promising for such applications, as they can tailor the phase, amplitude, and polarization of light at subwavelength resolution, enabling multi-functional ...
Chang-Hua Liu   +6 more
openaire   +3 more sources

Gate-tunable quantum pathways of high harmonic generation in graphene

open access: yesNature Communications, 2022
Under strong laser fields, materials exhibit extreme non-linear optical response, such as high harmonic generation. These higher harmonics provide insights into electron behaviour in materials in sub-laser cycle timescale.
Soonyoung Cha   +16 more
doaj   +1 more source

Improved Olfactory Deposition of Theophylline Using a Nanotech Soft Mist Nozzle Chip

open access: yesPharmaceutics, 2023
Currently, nasal administration of active pharmaceutical ingredients is most commonly performed using swirl-nozzle-based pump devices or pressurized syringes.
Madeline X. Zhang   +6 more
doaj   +1 more source

Two-Dimensional Six-Body van der Waals Interactions

open access: yesAtoms, 2022
Van der Waals interactions, primarily attractive van der Waals interactions, have been studied over one and half centuries. However, repulsive van der Waals interactions are less widely studied than attractive van der Waals interactions. In this article,
Jianing Han
doaj   +1 more source

Cosmological models described by a mixture of van der Waals fluid and dark energy [PDF]

open access: yes, 2003
The Universe is modeled as a binary mixture whose constituents are described by a van der Waals fluid and by a dark energy density. The dark energy density is considered either as the quintessence or as the Chaplygin gas.
Kremer, G. M.
core   +1 more source

Explosive fragmentation of Prince Rupert’s drops leads to well-defined fragment sizes

open access: yesNature Communications, 2021
Fragmentation of breaking glass as a brittle solid is a problem of equal practical and theoretical importance. Kooij et al. demonstrate that the fragment size distribution can surprisingly be both, either power-law or exponential, depending on how a ...
Stefan Kooij   +3 more
doaj   +1 more source

Thermodynamics of Van der Waals Fluids with quantum statistics [PDF]

open access: yes, 2016
We consider thermodynamics of the van der Waals fluid of quantum systems. We derive general relations of thermodynamic functions and parameters of any ideal gas and the corresponding van der Waals fluid.
Redlich, Krzysztof, Zalewski, Kacper
core   +2 more sources

Ultrafast 27 GHz cutoff frequency in vertical WSe2 Schottky diodes with extremely low contact resistance

open access: yesNature Communications, 2020
Two-dimensional materials show promise for 5G wireless communication applications. Here, the authors report vertical Schottky diodes based on thick mechanically exfoliated WSe2 flakes having low ohmic contact resistance of 50 Ω and ultrafast cutoff ...
Sung Jin Yang   +7 more
doaj   +1 more source

Adsorption of a water-soluble molecular rotor fluorescent probe on hydrophobic surfaces

open access: yesScientific Reports, 2022
Environmentally sensitive molecular rotors are widely used to probe the local molecular environment in e.g. polymer solutions, polymer glasses, and biological systems.
Elham Mirzahossein   +4 more
doaj   +1 more source

Deformation and tribology of multi-walled hollow nanoparticles [PDF]

open access: yes, 2000
Multi-walled hollow nanoparticles made from tungsten disulphide (WS$_2$) show exceptional tribological performance as additives to liquid lubricants due to effective transfer of low shear strength material onto the sliding surfaces.
Komura, S.   +2 more
core   +1 more source

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