Forskare stabiliserar ny materiefas med hjälp av silvernanopartiklar

Forskare vid Brown University och University of Michigan har skapat och stabiliserat en tidigare teoretisk kristallfas genom att sammanfoga specialanpassade silvernanopartiklar. Genombrottet, som publicerats i Science, avslöjar detaljer om hur metallkristaller omvandlas och uppvisar kvantoptiska egenskaper i rumstemperatur.

Teamet arrangerade avhuggna oktaederformade silverpartiklar, kallade meconer, i supergitter som matchar intermediära strukturer förutspådda av Nishiyama-Wassermann-vägen. Dessa strukturer bildas under skiften mellan ytcentrerade kubiska och rymdcentrerade kubiska arrangemang i metaller som järn. Nanopartiklarna var belagda med molekylära kedjor som hjälpte till att låsa de övergångsformade strukturerna på plats, vilket möjliggjorde direkta observationer för första gången.

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