Results 161 to 170 of about 306,273 (355)

Synthesis and Characterization of Highly Conductive Cobalt Phthalocyanine‐Based Metal–Organic Framework

open access: yesAdvanced Electronic Materials, EarlyView.
A two‐dimensional (2D) layered material, CoPc‐MOF, with a cobalt phthalocyanine backbone as its structural unit, was successfully synthesized. CoPc‐MOF adopts a crystal structure analogous to a Lieb lattice, which is a type of Dirac material. CoPc‐MOF exhibits exceptionally high electrical conductivity for an organic semiconductor, which likely ...
Norihiro Morishita   +8 more
wiley   +1 more source

Ultra‐Thin and Highly Insulating Aromatic Monolayers by N‐Heterocyclic Carbenes

open access: yesAngewandte Chemie, EarlyView.
By using N‐heterocyclic carbenes extremally insulating and at the same time as thin as 0.3 nm molecular films are formed. The charge transport calculations indicate absence of destructive quantum interference effect which was so far the only way to suppress conductivity in aromatic molecules.
Mateusz Wróbel   +6 more
wiley   +2 more sources

The Astronomy Center

open access: yes
The wonder and mystery associated with distant objects in space has fascinated humans for millennia, and young people today remain eager to learn about the world of astronomy.

core  

Highlighting the History of French Radio Astronomy. 4. Early Solar Research at the École Normale Supérieure, Marcoussis and Nancay [PDF]

open access: yes, 2009
The first tentative steps in solar radio astronomy took place during the 1940s and early 1950s as physicists and engineers in a number of countries used recycled World War II equipment to investigate the flux levels and polarisation of solar bursts and ...
Boischot, Andre   +5 more
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A Kinetic–Energetic Bottleneck of Charge‐Transfer Injection Governs Energy Loss in Organic Solar Cells

open access: yesAdvanced Energy Materials, EarlyView.
Kinetic–energetic projection of time‐resolved photoluminescence reveals that charge‐transfer injection acts as a universal bottleneck in organic solar cells. A physics‐constrained Bayesian framework identifies an emergent effective CT injection rate governing the trade‐off between charge generation and nonradiative energy loss.
Rong Wang   +16 more
wiley   +1 more source

Astronomers travel a lot (The Real Astronomy)

open access: yes, 2008
Professional Astronomers talk about the importance of travel for astronomy and how for many of them, travel was part of the attraction to embark on a astronomy career. This is the seventh podcast in the "Real Astronomy" series which highlights how modern
Centre for Astrophysics and Supercomputing
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Automatic Determination of Quasicrystalline Patterns from Microscopy Images

open access: yesAdvanced Intelligent Discovery, EarlyView.
This work introduces a user‐friendly machine learning tool to automatically extract and visualize quasicrystalline tiling patterns from atomically resolved microscopy images. It uses feature clustering, nearest‐neighbor analysis, and support vector machines. The method is broadly applicable to various quasicrystalline systems and is released as part of
Tano Kim Kender   +2 more
wiley   +1 more source

Impact of Observatory Visitor Centres on the Public's Understanding of Astronomy

open access: yes, 2000
In recent years, formal astronomy education has become an issue of great interest. Indeed, some boards of education now officially include astronomy in their curricula.
Burtnyk, Kimberly
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