Results 281 to 290 of about 839,047 (377)

Investigation of the laser fluence and wavelength dependence in surface‐assisted laser desorption/ionization mass spectrometry using gold nanoparticles

open access: yesRapid Communications in Mass Spectrometry, EarlyView.
Rationale Surface‐assisted laser desorption/ionization (SALDI) mass spectrometry (MS) builds on the use of nanostructured surfaces (e.g., coatings of colloidal nanoparticles) to promote analyte desorption and ionization. The SALDI process is believed to occur mainly through thermal processes, resulting from heating of the nanosubstrate upon absorption ...
Wendy H. Müller   +3 more
wiley   +1 more source

Nanotubes from Transition Metal Dichalcogenides: Recent Progress in the Synthesis, Characterization and Electrooptical Properties

open access: yesSmall, EarlyView.
This review describes recent (mostly last five years) progress in the synthesis, structural characterization, and properties of nanotubes from layered transition metal dichalcogenides, including in‐silico investigations. In the picture, ultra long multiwall nanotubes (up to 0.5 mm) nanotubes reported in Ref.
Lena Yadgarov, Reshef Tenne
wiley   +1 more source

Optimization of Interfacial Electrons and Compressive‐Tensile Strains at Lignin‐Derived Carbon‐Supported Multiphase Ni/Cu/MoO2 Interfaces for Boosting Large Current‐Density HER

open access: yesSmall, EarlyView.
The physicochemical and electrochemical results of Ni/Cu/MoO2@LC show that the multiphase interfaces formed by Ni, Cu, MoO2, and lignin‐derived carbon produce a synergistic effect of interfacial electron transfer and compressive‐tensile strains, which significantly improves HER activity and stability in a full pH range. Abstract Developing efficient pH‐
Xinyu Cao   +9 more
wiley   +1 more source

Self‐Assembled Silicon@Silica Metasurfaces with High‐Quality Resonances in the Infrared

open access: yesSmall Science, EarlyView.
An artificial magnetic resonance is created via the fabrication of a 2D silicon particle assembly. This particle to metasurface bottom‐up synthetic strategy presents many structural defaults and deviates largely from the ideal metasurfaces produced through top‐down techniques. Even so, the effective medium of this material appears to display a magnetic
Megan A. Parker   +14 more
wiley   +1 more source

Near‐Field Optical Nanopatterning of Graphene

open access: yesSmall Science, EarlyView.
Scattering‐type scanning near‐field optical microscopy‐driven near‐field optical nanopatterning of graphene is studied. 2D materials are emerging as transformative platforms for next‐generation memory, sensing, photonic, and quantum devices due to their extraordinary optical, mechanical, and electronic properties.
Gour Mohan Das   +4 more
wiley   +1 more source

Precise Measurement of Complex Coefficient Filters by Using Square Waves†

open access: yesIEEJ Transactions on Electrical and Electronic Engineering, EarlyView.
Usually, the frequency characteristics of the complex filter can be examined by applying a pair of quadrature sinusoidal waves (cosωt$$ \cos \omega t $$ and sinωt$$ \sin \omega t $$) to a FUT (filter under test). While this method is recognized for its accuracy, it requires two sinusoidal test signals with tightly matched amplitudes and a strict 90°$$ {
Kazuhiro Shouno   +2 more
wiley   +1 more source

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