Results 141 to 150 of about 1,184,079 (244)

Characterization of the Pore Environments in Covalent Organic Frameworks by Dynamic Spin Probe Exchange

open access: yesSmall, EarlyView.
Covalent organic frameworks (COFs) with alkyl or triethylene glycol pore linings are probed with water‐dissolved nitroxide radicals using CW EPR spectroscopy. Adsorption affinity, local polarity, and radical concentration inside the pores are quantified, revealing hydrogen bonding, dipolar, and π‐π interactions that govern guest binding, which ...
Sebastian Michler   +5 more
wiley   +1 more source

Magic Square 10000

open access: yes, 2014
Ensino Fundamental Final::MatemáticaThe resource is a magic square, who’s addition by line, column and main diagonal is the same. The squares are 4x4 type and with 10000 different hypothesis’ on each game.
Martins, Germano   +3 more
core  

Super‐Electron‐Donor Polymers: From Monomer Design to Redox Functionality

open access: yesSmall, EarlyView.
2,2'‐Bipyridinylidenes are known for their “super‐electron‐donor” properties and have therefore been used beyond the field of organic synthesis. Their two‐electron redox process at a low potential of 1.8 V vs. Li/Li+ makes them attractive negative p‐type electrode‐active materials.
Luisa Rzesny   +9 more
wiley   +1 more source

Beyond Integer Charge Transfer: A New Design Rule Linking Dopant Strength and Counterion Separation to Efficient Carrier Transport in Conjugated Polymers

open access: yesSmall, EarlyView.
In this Research Article, the authors introduce a new design principle for doped conjugated polymers, showing that dopant energy depth relative to the host polymer (ΔE) can be leveraged to minimize Coulomb interactions and boost conductivity. This discovery offers a new and simple strategy to optimize the performance of organic electronics for everyday
Muhamed Duhandžić   +3 more
wiley   +1 more source

How We Simulate Nanopores

open access: yesSmall Methods, EarlyView.
Nanopore technology has revolutionized single‐molecule sensing, yet it suffers from an inherent interpretive challenge. Molecular dynamics has emerged as a go‐to method for determining the relationship between the structure of translocating molecules and the nanopore current signals.
Behzad Mehrafrooz   +5 more
wiley   +1 more source

Magic Square 10000

open access: yes, 2010
Ensino Fundamental Final::MatemáticaThe resource is a magic square, who’s addition by line, column and main diagonal is the same. The squares are 4x4 type and with 10000 different hypothesis’ on each game.
Martins, Germano   +3 more
core  

Overcoming Imaging Limitations: 4D‐STEM Pair Distribution Function for Resolving Structure of Supported Pt55 and Pt200 Clusters

open access: yesSmall Methods, EarlyView.
4D‐STEM based electron diffraction analysis has been developed to characterize the average structure of sensitive, dynamic ultrasmall supported Pt clusters at variable temperature by pair distribution analysis (PDF). For Pt55 and Pt200 the best fit is obtained for a multiply twinned decahedral configuration.
Ajai Raj Lakshmi Nilayam   +5 more
wiley   +1 more source

Tailoring Laser Powder Bed Fusion and Post‐Processing Parameters for JIS SKD61 Tool Steels: Surface Roughness, Microstructure, and Mechanical Properties

open access: yessteel research international, EarlyView.
Laser powder bed fusion of JIS SKD61 tool steel is systematically optimized using a Taguchi design and ANOVA. Hatch spacing and layer thickness are identified as dominant parameters controlling surface roughness and tensile strength. Subsequent tempering at 600°C improves microstructural stability and mechanical performance, enabling high‐density SKD61
Masrurotin Masrurotin   +4 more
wiley   +1 more source

Dy2 Schiff Base Single Molecule Magnet Forming a Halogen Bonding Network: Experiment and Theory

open access: yesZeitschrift für anorganische und allgemeine Chemie, EarlyView.
A major challenge to improve SMMs is control over phonon‐based relaxation mechanisms, such as the Raman process. We approach this challenge through the incorporation of intermolecular interactions, which can restrict acoustic phonon modes. For this, we engineer the crystal lattice of a Dy2 SMM using halogen bonding and investigate its properties using ...
Jonas Braun   +7 more
wiley   +1 more source

Torture and scepticism in Papua New Guinea witch hunts Torture et scepticisme dans les chasses aux sorcières en Papouasie‐Nouvelle‐Guinée

open access: yesJournal of the Royal Anthropological Institute, EarlyView.
For over a century, anthropologists have documented the many institutions that exist to respond to witchcraft and the uncanny that it names: oracles that attempt to produce certainty by naming the witch; moots in which grievances are aired; trials in magistrates’ courts that attempt to satisfy the community while preserving the life of the accused ...
Chloe Nahum‐Claudel
wiley   +1 more source

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