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Vol.43.No.2(66) >

 
Title :層状ペロブスカイトKCa2Nb3O10からの半導体ナノシート液晶の合成
Authors :島崎 浩太朗
原田 啓吾
山本 伸也
宮元 展義
シマサキ コウタロウ
ハラダ ケイゴ
ヤマモト シンャ
ミヤモト ノブヨシ
Kotaro SHIMASAKI
Keigo HARADA
Shinya YAMAMOTO
Nobuyoshi MIYAMOTO
Issue Date :Feb-2011
Abstract :We identified the liquid crystal phase in the aqueous colloid of Ca2Nb3O10-nanosheets,which were synthesized by exfoliation of the smiconducting layered perovskite KCa2Nb3O10. The nanosheets were obtained in the highest yield when HCa2Nb3O10 was allowed to react with the exfoliating reagent (tetrabutylammonium;TBA+)in the molar ratio of TBA+:HCa2Nb3O10=10:1, followed by washing the sample for 6 times with water. When the nanosheet colloid (1.7wt%)was observed by crossed polarizers,the interference colors due to permanent birefringence was observed;this observation clearly confirmed the liquid crystallinity of this system. On the other hand, birefringence was not observed in the colloid of 0.4wt.%,indicating that the colloid is isotropic. In this dilute colloid,however,birefringence was temporarily observed when the nanosheet colloid was flowed. The liquid crystalline nanosheet colloid absorbed UV light with the wavelength smaller than 280nm,due to the semiconducting property of the nanosheet with the bandgap of 4.4eV.
Type Local :紀要論文
ISSN :02876620
Publisher :福岡工業大学附属図書館
URI :http://hdl.handle.net/11478/1309
citation :福岡工業大学研究論集
43
2
123
128
Citation :福岡工業大学研究論集 Vol.43 no.2 p.123 -128
Appears in Collections:Vol.43.No.2(66)

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