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Ultra‐Long Single‐Crystalline α‐Si 3 N 4 Nanowires: Derived from a Polymeric Precursor
Author(s) -
Yang Weiyou,
Xie Zhipeng,
Li Jingjing,
Miao Hezhuo,
Zhang Ligong,
An Linan
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00270.x
Subject(s) - nanowire , materials science , crystallization , stacking , chemical engineering , thermal decomposition , polymer , crystallography , nanotechnology , vapor–liquid–solid method , composite material , chemistry , organic chemistry , engineering
Single‐crystalline α‐Si 3 N 4 nanowires were synthesized by thermal decomposition of a polysilazane preceramic polymer using FeCl 2 powders as catalyst. The nanowires, which are 20–40 nm in diameter and up to several mm in length, possess smooth surfaces and uniform diameters along the entire length and contain no detectable structural defects such as dislocation or stacking faults. The study also revealed that all nanowires grow along [100] direction. The growth of the nanowires is attributed to a novel solid–liquid–gas–solid reaction/crystallization process. The mechanism that governs the formation of nanowires rather than nanobelts is discussed.