Grassy Silica Nanoribbons and Strong Blue Luminescence.
Silicon dioxide (SiO2) is one of the key materials in many modern technological applications such as in metal oxide semiconductor transistors, photovoltaic solar cells, pollution removal, and biomedicine. We report the accidental discovery of free-standing grassy silica nanoribbons directly grown on SiO2/Si platform which is commonly used for field-effect transistors fabrication without other precursor. We investigate the formation mechanism of this novel silica nanostructure that has not been previously documented. The silica nanoribbons are flexible and can be manipulated by electron-beam. The silica nanoribbons exhibit strong blue emission at about 467 nm, together with UV and red emissions as investigated by cathodoluminescence technique. The origins of the luminescence are attributed to various defects in the silica nanoribbons; and the intensity change of the blue emission and green emission at about 550 nm is discussed in the frame of the defect density. Our study may lead to rational design of the new silica-based materials for a wide range of applications.
College of Information Science &Electronic Engineering, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University,Hangzhou 310027, P. R. China.
Shengping
S
Wang
State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China.
Shuang
S
Xie
College of Information Science &Electronic Engineering, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University,Hangzhou 310027, P. R. China.
Guowei
G
Huang
Nano Characterization Unit, National Institute for Materials Science,1-2-1 Sengen, Tsukuba 305-0047, Japan.
Hongxuan
H
Guo
Nano Electronics Materials Unit, WPI Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
Yujin
Y
Cho
Nano Electronics Materials Unit, WPI Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
Jun
J
Chen
Nano Characterization Unit, National Institute for Materials Science,1-2-1 Sengen, Tsukuba 305-0047, Japan.
Daisuke
D
Fujita
College of Information Science &Electronic Engineering, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University,Hangzhou 310027, P. R. China.
Mingsheng
M
Xu
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