Evolution of Calcite Nanocrystals through Oriented Attachment and Fragmentation: Multistep Pathway Involving Bottom-Up and Break-Down Stages

Mihiro Takasaki, Yuki Kezuka, Masahiko Tajika, Yuya Oaki, Hiroaki Imai

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3 Citations (Scopus)


A nonclassical multistep pathway involving bottom-up and break-down stages for the evolution of calcite nanograins ∼50 nm in size was demonstrated in a basic aqueous system. Calcite nanofibrils ∼10 nm wide were produced as the initial crystalline phase via amorphous calcium carbonate through ion-by-ion assembly by the carbonation of Ca(OH) 2 at a high pH of ∼13. Bundles ∼50 nm in diameter were then formed by the subsequent oriented attachment of the nanofibrils. Monodispersed calcite nanograins were finally obtained through spontaneous fragmentation of the fibrous forms via a decrease in pH by further carbonation.

Original languageEnglish
Pages (from-to)8997-9001
Number of pages5
JournalACS Omega
Issue number12
Publication statusPublished - 2017 Jan 1


ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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