Journal ArticleDOI
Liquid Crystalline Inorganic Nanosheet Colloids Derived From Layered Materials
TLDR
In this article, the recent progress of emerging new materials of inorganic nanosheet liquid crystals is reviewed with a focus on the behaviors of each system, alignment by external field, and theoretical aspects.Abstract:
Inorganic layered crystals such as clay minerals, layered niobates, and graphite are exfoliated in solvents to form colloidal dispersions of extremely thin inorganic nanosheets. Recently, the liquid crystal phases of these “nanosheet colloids” have been rediscovered and are attracting interest as new types of inorganic liquid crystals. The huge anisotropy of the mesogenic nanosheets compared to other liquid crystal systems is an important feature of the nanosheet liquid crystals for fundamental studies in the fields of colloid science and soft matter physics. In addition, the rich functionalities intrinsic to inorganic materials open a variety of applications such as smart colloids and composite materials with structural regularity. In this article, the recent progress of the emerging new materials of inorganic nanosheet liquid crystals is reviewed with a focus on the behaviors of each system, alignment by external field, and theoretical aspects.read more
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Molecular Robots with Sensors and Intelligence
TL;DR: This Account introduces an ongoing research project that focuses on the development of molecular robotics funded by MEXT (Ministry of Education, Culture, Sports, Science and Technology, Japan), titled "Development of Molecular Robots Equipped with Sensors and Intelligence".
Journal ArticleDOI
An Anisotropic Hydrogel Actuator Enabling Earthworm-Like Directed Peristaltic Crawling
Zhifang Sun,Yoshihiro Yamauchi,Fumito Araoka,Youn Soo Kim,Julian Bergueiro,Yasuhiro Ishida,Yasuo Ebina,Takayoshi Sasaki,Takaaki Hikima,Takuzo Aida +9 more
TL;DR: An unprecedented hydrogel actuator is reported that enables not only a peristaltic crawling motion but also reversing its direction, when the scanning direction is switched and the crawling direction is reversed.
Journal ArticleDOI
Soft chemistry of ion-exchangeable layered metal oxides
TL;DR: This review focuses on the use of soft chemical approaches to design functional layered transition metal oxides with tunable properties for diverse applications that include artificial photosynthesis, catalysis, energy storage, fuel cells, optical sensors, ferroics, and high-k dielectrics.
Journal ArticleDOI
Photonic water dynamically responsive to external stimuli.
Koki Sano,Youn Soo Kim,Yasuhiro Ishida,Yasuo Ebina,Takayoshi Sasaki,Takaaki Hikima,Takuzo Aida +6 more
TL;DR: It is reported that a dilute aqueous colloidal dispersion of negatively charged titanate nanosheets exhibits structural colours, and the reflective colour of the photonic water can be modulated over the entire visible region in response to appropriate physical or chemical stimuli.
Journal ArticleDOI
Photo-Induced Anomalous Deformation of Poly(N-Isopropylacrylamide) Gel Hybridized with an Inorganic Nanosheet Liquid Crystal Aligned by Electric Field.
Takumi Inadomi,Shogo Ikeda,Yasushi Okumura,Hirotsugu Kikuchi,Nobuyoshi Miyamoto,Nobuyoshi Miyamoto +5 more
TL;DR: Interestingly, the photo-irradiated gel shows temporal expansion along one direction followed by anisotropic shrinkage, which is an anomalous behavior for a conventional PNIPA gel.
References
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Journal ArticleDOI
The effects of shape on the interaction of colloidal particles
TL;DR: In this article, it was shown that colloids in general are apt to exhibit considerable deviations from Raoult's law and that crystalline phases retaining a fair proportion of solvent may separate from concentrated solutions.
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Theory of the Stability of Lyophobic Colloids
TL;DR: Theory of the Stability of Lyophobic Colloids The Interaction of Sol Particles having an Electric Double Layer and the nature of the electrical double layer which exists around them in salt solutions is discovered.
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Photofunctions of intercalation compounds
Makoto Ogawa,Kazuyuki Kuroda +1 more
TL;DR: In this paper, the authors review the studies on the photofunctions of intercalation compounds, focusing mainly on the role of layered structure on the organization of photoactive species; they discuss only in connection with the microscopic structures.
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Graphene chiral liquid crystals and macroscopic assembled fibres
TL;DR: It is reported that soluble, chemically oxidized graphene or graphene oxide sheets can form chiral liquid crystals in a twist-grain-boundary phase-like model with simultaneous lamellar ordering and long-range helical frustrations.