Mixed Aerogels from Au and CdTe Nanoparticles

被引：56

作者：

Hendel, Thomas ^{[1
,2
]}

Lesnyak, Vladimir ^{[2
,3
]}

Kuehn, Laura ^{[2
]}

Herrmann, Anne-Kristin ^{[2
]}

Bigall, Nadja C. ^{[4
,5
]}

Borchardt, Lars ^{[2
]}

Kaskel, Stefan ^{[2
]}

Gaponik, Nikolai ^{[2
]}

Eychmueller, Alexander ^{[2
]}

机构：

[1] Humboldt Univ, Inst Chem, D-12489 Berlin, Germany

[2] Tech Univ Dresden, D-01062 Dresden, Germany

[3] Ist Italiano Tecnol, I-16163 Genoa, Italy

[4] Univ Marburg, Fachbereich Phys, D-35037 Marburg, Germany

[5] Univ Marburg, Wissenschaftliches Zentrum Mat Wissensch, D-35037 Marburg, Germany

来源：

ADVANCED FUNCTIONAL MATERIALS | 2013年 / 23卷 / 15期

关键词：

aerogels; CdTe nanocrystals; Au nanocrystals; colloidal synthesis; photochemical gelation; SURFACE-PLASMON RESONANCE; GOLD NANOPARTICLES; QUANTUM DOTS; OPTICAL-PROPERTIES; NANOCRYSTALS; SEMICONDUCTOR; CDSE; SIZE; GELS; PHOTOLUMINESCENCE;

D O I：

10.1002/adfm.201201674

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Mixed metalsemiconductor nanocrystal aerogels are fabricated, which are light-emitting and highly porous macroscopic monoliths. Thiol-stabilized CdTe and Au nanoparticles from aqueous synthesis act as building blocks for the hybrid material. The Au colloids undergo a surface-modification to enhance the particle stability and achieve thiol functionalities. A photochemical treatment is applied for the gelation process which is found to be reversible by subsequent addition of thiol molecules. Via supercritical drying aerogels are formed. The variation of the initial CdTe to Au nanoparticle ratio permits a facile tuning of the content and the properties of the resulting aerogels. The obtained structures were characterized by means of optical spectroscopy, electron microscopy, elemental analysis, and nitrogen physisorption.

引用

页码：1903 / 1911

页数：9

共 74 条

[1] Photochemical instability of CdSe nanocrystals coated by hydrophilic thiols [J].