Phase-tuned tetrapod-shaped CdTe nanocrystals by ligand effect

被引：37

作者：

Cho, Jin Woo ^{[1
]}

Kim, Han Sung ^{[1
]}

Kim, Yun Ju ^{[1
]}

Jang, So Young ^{[1
]}

Park, Jeunghee ^{[1
]}

Kim, Jin-Gyu ^{[2
]}

Kim, Youn-Joong ^{[2
]}

Cha, Eun Hee ^{[3
]}

机构：

[1] Korea Univ, Dept Chem, Jochiwon 339700, South Korea

[2] Korea Basic Res Inst, Div Electron Microscop Res, Taejon 305333, South Korea

[3] Hoseo Univ, Dept Liberal Art & Literature, Asan Chungnam 336795, South Korea

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 17期

关键词：

D O I：

10.1021/cm801359k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We achieved extensive control of the morphology and phase of colloidal cadmium telluride (CdTe) nanocrystals (NCs) using two different types of capping ligands, namely, amines and phosphonic acids having various alkyl chains ranging from butyl (C4) to octadecyl (C18). Among the alkylamines, the largest tetrapods are preferentially produced using octylamine (U), suggesting that the steric hindrance of the alkyl chains optimizes the growth condition of the tetrapods. The phase of the tetrapod branches can be tuned from wurtzite to zinc blende by enhancing the steric hindrance of the tertiary alkyl phosphine used as the Te activating ligand. The in situ synthesis of tetrapod CdTe NCs on carbon nanotubes (CNTs) was performed using the two types of ligands. All of the CdTe NCs grown on the CNTs consisted of wurtzite phase, and the largest tetrapods are produced using phosphonic acid having the alkyl chain, C10.

引用

页码：5600 / 5609

页数：10

共 70 条

[61] In situ coating carbon nanotubes with wurtzite ZnS nanocrystals [J].