Size Reduction of CdSe/ZnS Quantum Dots by a Peptidic Amyloid Supergelator

被引：9

作者：

Zaman, Md Badruz ^{[1
]}

Bardelang, David ^{[1
]}

Prakesch, Michael ^{[2
]}

Leek, Donald M. ^{[1
]}

Naubron, Jean-Valere ^{[3
,4
]}

Chan, Gordon ^{[5
]}

Wu, Xiaohua ^{[6
]}

Ripmeester, John A. ^{[1
]}

Ratcliffe, Christopher I. ^{[1
]}

Yu, Kui ^{[1
]}

机构：

[1] Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, Canada

[2] MaRS Ctr, Ontario Inst Canc Res, Toronto, ON M5G 1L7, Canada

[3] Univ Aix Marseille, F-13397 Marseille 20, France

[4] CNRS, F-13397 Marseille 20, France

[5] Natl Res Council Canada, Inst Res Construct, Ottawa, ON K1A 0R6, Canada

[6] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada

来源：

ACS APPLIED MATERIALS & INTERFACES | 2012年 / 4卷 / 03期

关键词：

nanoparticles; etching; peptide; gelator; self-assembly; quantum dots; HYDROGEL; NANOPARTICLES; ARCHITECTURE; ABSORPTION; ORGANOGELS; FIBRILS; FORM;

D O I：

10.1021/am3001715

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Anchoring of a self-assembling dipeptide on the surface of core/shell CdSe/ZnS quantum dots resulted in a competition between coordination of the surface atoms of the QDs and the strong tendency for the dipeptide to self-assemble in toluene. This resulted in a mild QD etching and in a corresponding increase in the band gap of the nanocrystals whose photoluminescent emission gradually turns blue with time. The FmocLeuLeuOH dipeptide supergelator self-assembles in fibrils in which the Fmoc groups are surrounded by the pendant isobutyl side chains of the leucine residues with vibrational circular dichroism (VCD) and liquid- and solid-state NMR attributes of twist anti-parallel beta-sheets.

引用

页码：1178 / 1181

页数：4

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