Effects of alkylamine chain length on the thermal behavior of CdSe quantum dot glassy films

被引：28

作者：

Meulenberg, RW ^{[1
]}

Bryan, S ^{[1
]}

Yun, CS ^{[1
]}

Strouse, GF ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2002年 / 106卷 / 32期

关键词：

D O I：

10.1021/jp025802q

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：

The competition between dimensional and domain effects for the packing of amphiphilic passivants on CdSe quantum dot (QD) surfaces is examined using temperature-dependent attenuated total reflection infrared spectroscopy. The results indicate that at very small particle sizes (r < 22 Angstrom) disordered packing of the organic passivant arises due to the lack of an available thermodynamically stable packing domain for the passivant on the QD facets. At particle sizes r > 22 Angstrom, a stable chain domain can be established where the chain packing thermodynamics is governed by purely dimensional effects related to the ratio of the chain length (<L>) to the particle radius (r). Using a mean field statistical mechanical calculation, we find the theoretical calculations predict the observed <L>/r passivant layer stabilization for QD systems.

引用

页码：7774 / 7780

页数：7

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