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Surface reservoirs dominate dynamic gas-surface partitioning of many indoor air constituents

Surface reservoirs dominate dynamic gas-surface partitioning of many indoor air constituents

Human health is affected by indoor air quality. One distinctive aspect of the indoor environment is its very large surface area that acts as a poorly characterized sink and source of gas-phase chemicals. In this work, air-surface interactions of 19 common indoor air contaminants with diverse properties and sources were monitored in a house using fast-response, on-line mass spectrometric and spectroscopic methods. Enhanced-ventilation experiments demonstrate that most of the contaminants reside in the surface reservoirs and not, as expected, in the gas phase. They participate in rapid...

February 22, 2020
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Ratcheting quasi-ballistic electrons in silicon geometric diodes at room temperature

Ratcheting quasi-ballistic electrons in silicon geometric diodes at room temperature

You are currently viewing the abstract.AAAS login provides access to Science for AAAS members, and access to other journals in the Science family to users who have purchased individual subscriptions.Log in via OpenAthens.Log in with your institution via Shibboleth.Download and print this article for your personal scholarly, research, and educational use.Buy a single issue of Science for just $15 USD.Conventional diodes rectify current flow by forming a junction between dissimilar conductors; a metal-semiconductor diode that forms a Schottky barrier is one example. In these devices,...

April 10, 2020
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Quantum computation solves a half-century-old enigma: Elusive vibrational states of magnesium dimer found

Quantum computation solves a half-century-old enigma: Elusive vibrational states of magnesium dimer found

The high-lying vibrational states of the magnesium dimer (Mg2), which has been recognized as an important system in studies of ultracold and collisional phenomena, have eluded experimental characterization for half a century. Until now, only the first 14 vibrational states of Mg2 have been experimentally resolved, although it has been suggested that the ground-state potential may support five additional levels. Here, we present highly accurate ab initio potential energy curves based on state-of-the-art coupled-cluster and full configuration interaction computations for the ground and...

April 1, 2020
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Balancing volumetric and gravimetric uptake in highly porous materials for clean energy

Balancing volumetric and gravimetric uptake in highly porous materials for clean energy

AAAS login provides access to Science for AAAS members, and access to other journals in the Science family to users who have purchased individual subscriptions.Log in via OpenAthens.Log in with your institution via Shibboleth.Download and print this article for your personal scholarly, research, and educational use.Buy a single issue of Science for just $15 USD.Vol 368, Issue 648817 April 2020Vol 368, Issue 6488© 2020 . All rights reserved. AAAS is a partner of , , , , ,  and .Science ISSN 1095-9203.

April 17, 2020
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