Format

Send to

Choose Destination
Langmuir. 2011 Apr 19;27(8):4867-72. doi: 10.1021/la104942t. Epub 2011 Mar 16.

Assembly kinetics of nanocrystals via peptide hybridization.

Author information

1
Department of Electrical and Electronics Engineering, Department of Physics and UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey. uosseker@ntu.edu.sg

Abstract

The assembly kinetics of colloidal semiconductor quantum dots (QDs) on solid inorganic surfaces is of fundamental importance for implementation of their solid-state devices. Herein an inorganic binding peptide, silica binding QBP1, was utilized for the self-assembly of nanocrystal quantum dots on silica surface as a smart molecular linker. The QD binding kinetics was studied comparatively in three different cases: first, QD adsorption with no functionalization of substrate or QD surface; second, QD adsorption on QBP1-modified surface; and, finally, adsorption of QBP1-functionalized QD on silica surface. The surface modification of QDs with QBP1 enabled 79.3-fold enhancement in QD binding affinity, while modification of a silica surface with QBP1 led to only 3.3-fold enhancement. The fluorescence microscopy images also supported a coherent assembly with correspondingly increased binding affinity. Decoration of QDs with inorganic peptides was shown to increase the amount of surface-bound QDs dramatically compared to the conventional methods. These results offer new opportunities for the assembly of QDs on solid surfaces for future device applications.

PMID:
21410195
DOI:
10.1021/la104942t
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center