Substantial Narrowing on the Width of “Concentration Window” of Hydrothermal ZnO Nanowires via Ammonia Addition

Daiki Sakai, Kazuki Nagashima, Hideto Yoshida, Masaki Kanai, Yong He, Guozhu Zhang, Xixi Zhao, Tsunaki Takahashi, Takao Yasui, Takuro Hosomi, Yuki Uchida, Seiji Takeda, Yoshinobu Baba, Takeshi Yanagida

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抜粋

A crystal growth of hydrothermal ZnO nanowires essentially requires a concentration control within so-called “concentration window”, where the anisotropic crystal growth of ZnO nanowires preferentially occurs. Although understanding what exactly determines the width of “concentration window” is important to tailor the anisotropic crystal growth process, the fundamental knowledge as to “concentration window” is still scarce. Here we report the effect of ammonia addition on the width of “concentration window” using conventional hydrothermal ZnO nanowire growth. We found that the ammonia addition substantially narrows the width of “concentration window”. Within the narrow range of zinc complex concentration, we found a significant increase of growth rate (up to 2000 nm/h) of ZnO nanowires. The narrowed “concentration window” and the resultant increased growth rate by the ammonia addition can be understood in terms of synchronized effects of both (1) a reduction of zinc hydroxide complex (precursor) concentration and (2) a fast rate limiting process of ligand exchange between different zinc complexes. Thus, the present knowldege as to “concentration window” will accelerate further tailoring an anisotropic crystal growth of hydrothermal ZnO nanowires.

元の言語英語
記事番号14160
ジャーナルScientific reports
9
発行部数1
DOI
出版物ステータス出版済み - 12 1 2019

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • General

これを引用