Unusually stable ∼100-fold reversible and instantaneous swelling of inorganic layered materials

被引:119
作者
Geng, Fengxia [1 ]
Ma, Renzhi [1 ]
Nakamura, Akira [1 ]
Akatsuka, Kosho [1 ]
Ebina, Yasuo [1 ]
Yamauchi, Yusuke [1 ,2 ,3 ]
Miyamoto, Nobuyoshi [4 ]
Tateyama, Yoshitaka [1 ,2 ,3 ]
Sasaki, Takayoshi [1 ,2 ,3 ]
机构
[1] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton, Tsukuba, Ibaraki 3050044, Japan
[2] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3330012, Japan
[3] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3330012, Japan
[4] Fukuoka Inst Technol, Dept Life Environm & Mat Sci, Higashi Ku, Fukuoka 8110295, Japan
来源
NATURE COMMUNICATIONS | 2013年 / 4卷
关键词
NANOSHEETS; VERMICULITE; EXFOLIATION; CRYSTALS; FILMS; WATER; DISPERSIONS; SUSPENSIONS; HYDROXIDES; GRAPHENE;
D O I
10.1038/ncomms2641
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Cells can swell or shrink in certain solutions; however, no equivalent activity has been observed in inorganic materials. Although lamellar materials exhibit increased volume with increase in the lamellar period, the interlamellar expansion is usually limited to a few nanometres, with a simultaneous partial or complete exfoliation into individual atomic layers. Here we demonstrate a large monolithic crystalline swelling of layered materials. The gallery spacing can be instantly increased similar to 100-fold in one direction to similar to 90 nm, with the neighbouring layers separated primarily by H2O. The layers remain strongly held without peeling or translational shifts, maintaining a nearly perfect three-dimensional lattice structure of >3,000 layers. First-principle calculations yield a long-range directional structuring of the H2O molecules that may help to stabilize the highly swollen structure. The crystals can also instantaneously shrink back to their original sizes. These findings provide a benchmark for understanding the exfoliating layered materials.
引用
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页数:7
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