TY - JOUR
T1 - Synthesis of hollow vaterite CaCO3 microspheres in supercritical carbon dioxide medium
AU - Beuvier, Thomas
AU - Calvignac, Brice
AU - Delcroix, Gaëtan Jean Robert
AU - Tran, My Kien
AU - Kodjikian, Stéphanie
AU - Delorme, Nicolas
AU - Bardeau, Jean Franois
AU - Gibaud, Alain
AU - Boury, Frank
PY - 2011/7/14
Y1 - 2011/7/14
N2 - We here describe a rapid method for synthesizing hollow core, porous crystalline calcium carbonate microspheres composed of vaterite using supercritical carbon dioxide in aqueous media, without surfactants. We show that the reaction in alkaline media rapidly conducts to the formation of microspheres with an average diameter of 5 m. SEM, TEM and AFM observations reveal that the microspheres have a hollow core of around 0.7 m width and are composed of nanograins with an average diameter of 40 nm. These nanograins are responsible for the high specific surface area of 16 m2 g -1 deduced from nitrogen absorption/desorption isotherms, which moreover confers an important porosity to the microspheres. We believe this work may pave the way for the elaboration of a biomaterial with a large potential for therapeutic as well as diagnostic applications.
AB - We here describe a rapid method for synthesizing hollow core, porous crystalline calcium carbonate microspheres composed of vaterite using supercritical carbon dioxide in aqueous media, without surfactants. We show that the reaction in alkaline media rapidly conducts to the formation of microspheres with an average diameter of 5 m. SEM, TEM and AFM observations reveal that the microspheres have a hollow core of around 0.7 m width and are composed of nanograins with an average diameter of 40 nm. These nanograins are responsible for the high specific surface area of 16 m2 g -1 deduced from nitrogen absorption/desorption isotherms, which moreover confers an important porosity to the microspheres. We believe this work may pave the way for the elaboration of a biomaterial with a large potential for therapeutic as well as diagnostic applications.
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U2 - 10.1039/c1jm10770d
DO - 10.1039/c1jm10770d
M3 - Article
AN - SCOPUS:79959456110
VL - 21
SP - 9757
EP - 9761
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
SN - 0959-9428
IS - 26
ER -