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Forscher machen Wasser metallisch - Experiment verleiht Wasser freie Elektronen und Leitfähigkeit - ohne Hochdruck


30. Juli 2021
Die Umfärbung dieses Tropfens von silbrig zu golden zeigt an, dass die Wasserschicht auf seiner Oberfläche metallische Eigenschaften bekommen hat. © Phil Mason / IOCB Prague
Wundersame Verwandlung: Forscher haben Wasser erstmals metallische Eigenschaften verpasst – ohne Hochdruck und bei Raumtemperatur. Gelungen ist dies durch einen raffinierten Trick: Sie ließen im Vakuum Wasserdampf auf einem Tropfen flüssiger Alkalimetalle kondensieren. Die Einwanderung von Elektronen aus dem Metall verlieh der dünnen Wasserschicht daraufhin kurzzeitig die Leitfähigkeit und das Aussehen eines Metalls: Der Tropfen bekam einen Goldglanz.
Metalle besitzen eine gute Leitfähigkeit, weil ihre delokalisierten Außenelektronen sich frei im Atomgitter bewegen können. Anders ist dies bei destillierten Wasser: Weil die Außenelektronen der beteiligten Atome fest gebunden bleiben, ist reines Wasser ein nahezu perfekter Isolator. Um es leitend und damit metallisch machen ....

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Philadelphia man facing federal charges in alleged murder-for-hire plot


Philadelphia man facing federal charges in alleged murder-for-hire plot
By FOX 29 staff
U.S. Attorney s office announces arrest, federal charges in murder-for-hire plot
On Monday, federal and local officials held a press conference to announce the arrest of Darnell Jackson in an alleged murder for hire plot.
PHILADELPHIA - Authorities announced federal charges in a murder-for-hire plot stemming from a collaborative investigation launched under the All Hands On Deck initiative.
Darnell Jackson, also known by his street name Major Change, 47, is alleged to have orchestrated a murder-for-hire plot stemming from an ongoing state narcotics investigation.
In court filings unsealed Monday, it is alleged that on Monday, July 19 Jackson told an individual that he was willing to pay $5,000 to have someone murdered.  ....

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