期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 47, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202211254
关键词
Additive-Free; Amorphous Calcium Carbonate; Cluster Structures; Nanocomposites
资金
- National Natural Science Foundation of China [51732011, 21701161, U1932213]
- National Key Research and Development Program of China [2018YFE0202201, 2021YFA0715700]
- Science and Technology Major Project of Anhui Province [201903a05020003]
- University Synergy Innovation Program of Anhui Province [GXXT-2019-028]
- USTC Research Funds of the Double First-Class Initiative [YD9990002003]
This article reports the synthesis of amorphous calcium carbonate (ACC) nanospheres in a water-deficient organic solvent system and reveals the structural characteristics and formation mechanism of ACC nanospheres.
As the key intermediate phase of crystalline calcium carbonate biominerals, amorphous calcium carbonate (ACC) remains mysterious in its structures because of its long-range disorder and instability. We herein report the synthesis of ACC nanospheres in a water-deficient organic solvent system. The obtained ACC nanospheres are very stable under dry conditions. Cryo-TEM reveals that each nanospheres consists of smaller nanosized clusters. We further demonstrate that these clusters can precipitate on other substrates to form an ultrathin ACC coating, which should be an ACC cluster monolayer. The results demonstrate that the presence of small ACC clusters as the subunits of larger aggregates is inherent to ACC synthesized in water-alcohol system but not induced by polymer additives.
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