TY - JOUR
T1 - Evolution of Calcite Nanocrystals through Oriented Attachment and Fragmentation
T2 - Multistep Pathway Involving Bottom-Up and Break-Down Stages
AU - Takasaki, Mihiro
AU - Kezuka, Yuki
AU - Tajika, Masahiko
AU - Oaki, Yuya
AU - Imai, Hiroaki
N1 - Funding Information:
This work was partially supported by the Kato Foundation for Promotion of Science (KS-2806), Grant-in-Aid for Challenging Exploratory Research (15K14129), and Grant-in-Aid for Scientific Research (A) (16H02398) from Japan Society for the Promotion of Science.
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/12/31
Y1 - 2017/12/31
N2 - 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.
AB - 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.
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U2 - 10.1021/acsomega.7b01487
DO - 10.1021/acsomega.7b01487
M3 - Article
AN - SCOPUS:85048734321
VL - 2
SP - 8997
EP - 9001
JO - ACS Omega
JF - ACS Omega
SN - 2470-1343
IS - 12
ER -