Results 171 to 180 of about 368,263 (301)

Analyses of Crawford’s uvby β calibrations using the pulsational variations of FG Vir. Veröffentlichungen der Kommission für Astronomie|Communications in Asteroseismology|Communications in Asteroseismology 162 162|

open access: yes, 2011
Crawford’s uvby ß calibration method is examined for A-type stars by comparing it with the pulsational variations of the observable m1, c1 and MV for the δ Scuti star FG Vir. The fit between the calibration values of m1 and MV and the respective measurements for FG Vir are tested as a function of temperature based on 3068 4-colour values taken at the ...
openaire  

Direct Visualization and Quantitative Insights into the Formation and Phase Evolution of Cu Nanoparticles via In Situ Liquid Phase 4D‐STEM

open access: yesAdvanced Science, EarlyView.
By integrating in situ liquid phase transmission electron microscopy (LP‐TEM) with 4D scanning transmission electron microscopy (4D‐STEM), this work not only reveals the morphology and phase evolution of Cu nanoparticles during electrodeposition and electrooxidation processes but also demonstrates the possibility of mapping the grain size and phase ...
Ningyan Cheng   +3 more
wiley   +1 more source

Eclipses: A Brief History of Celestial Mechanics, Astrometry and Astrophysics

open access: yesUniverse
Solar and lunar eclipses are indeed the first astronomical phenomena which have been recorded since very early antiquity. Their periodicities gave birth to the first luni-solar calendars based on the Methonic cycle since the sixth century before Christ ...
Costantino Sigismondi, Paolo De Vincenzi
doaj   +1 more source

Interfacial Momentum Matching for Ohmic Van Der Waals Contact Construction

open access: yesAdvanced Electronic Materials, EarlyView.
Establishing ohmic contacts on 2D material‐based electronic devices is challenging but critical. While most efforts focus on improving metal‐semiconductor band‐structure alignment, the effects of charge carrier momentum (p) distribution at the interfaces are often overlooked.
Tara Jabegu   +8 more
wiley   +1 more source

Achieving High Ferroelectric Polarization in Ultrathin BaTiO3 Films on Si

open access: yesAdvanced Electronic Materials, EarlyView.
A high remanent polarization is demonstrated in 10 nm ferroelectric polycrystalline BaTiO3 films on Si wafers for the first time, which is also competitive with the epitaxial state‐of‐the‐art. The growth is achieved through the development and use of platinum silicide.
Pratik Bagul   +10 more
wiley   +1 more source

Reducing the Barrier Height in Organic Transistors

open access: yesAdvanced Electronic Materials, EarlyView.
This work demonstrates the reduction of the Schottky barrier height in bottom‐contact top‐gate organic transistors by adding 1 nm thick atomic layer deposited Al2O3 on the contacts. The ultrathin Al2O3 layer helps in filling up the trap states at the metal‐semiconductor interface, thus de‐pinning the Fermi level and reducing the overall barrier height ...
Arash Ghobadi   +7 more
wiley   +1 more source

Neuron‐Inspired Biomolecular Memcapacitors Formed Using Droplet Interface Bilayer Networks

open access: yesAdvanced Electronic Materials, EarlyView.
In this article, a biomolecular model neuron capable of integrating charge is proposed, evaluated, and simulated as a soft neuromorphic device. The device traps charge within microfluidic droplets using lipid membranes and voltage‐activated pores. The trapped charge produces electrowetting of the lipid interfaces, which facilitates multiple memory ...
Braydon Segars   +5 more
wiley   +1 more source

Low‐boiling Point Perfluorocarbon Nanodroplets as Dual‐Phase Dual‐Modality MR/US Contrast Agent

open access: yesChemPhysChem, Volume 23, Issue 24, December 16, 2022., 2022
Low‐boiling point perfluorocarbon nanodroplets is vaporized into microbubbles using acoustic activation, establishing them as phase‐change contrast agents for ultrasound. The unique hyperCEST signatures of nanodroplets and microbubbles are demonstrated, enabling their use not only as a dual‐phase but also as a dual‐modality MR/US contrast agent ...
Christian T. McHugh   +6 more
wiley   +1 more source

Inkjet Printed Multifunctional Graphene Sensors for Flexible and Wearable Electronics

open access: yesAdvanced Electronic Materials, EarlyView.
The sensitivity of electrical properties of graphene to external stimuli are used to demonstrate multifunctional inkjet‐printed graphene sensors for the detection of pressure, temperature, humidity, and magnetic field. By combining the design freedom of inkjet printing with the unique properties of graphene, multifunctional devices are achieved ...
Feiran Wang   +10 more
wiley   +1 more source

Ag Nanowire‐Integrated MoS2/ZnO Heterojunctions for Highly Efficient Photogenerated Charge Transfer

open access: yesAdvanced Electronic Materials, EarlyView.
A versatile strategy is reported for fabricating multi‐dimensional heterojunctions with significantly improved charge transfer capability. By integrating Ag nanowires with a MoS2/ZnO heterojunction, a fourfold increase in surface photovoltage is achieved, reaching 200 mV under visible light illumination.
Anh Thi Nguyen   +8 more
wiley   +1 more source

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