Directed assembly and in situ manipulation of semiconductor quantum dots in liquid crystal matrices

A. L. Rodarte; C. G. L. Ferri; C. Gray; L. S. Hirst; S. Ghosh

doi:10.1117/12.906235

10 February 2012 Directed assembly and in situ manipulation of semiconductor quantum dots in liquid crystal matrices

A. L. Rodarte, C. G. L. Ferri, C. Gray, L. S. Hirst, S. Ghosh

Proceedings Volume 8279, Emerging Liquid Crystal Technologies VII; 82790H (2012) https://doi.org/10.1117/12.906235
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

The ability to control and direct self-assembly of nanostructures into specific geometries with new functionalities, while preserving their original optical and electronic properties, is an attractive research endeavor. We have fabricated liquid crystal (LC) based matrices into which chemically synthesized nanostructures of varied morphologies and compositions are uniformly dispersed. Using high resolution spatially- and time-resolved scanning photoluminescence (PL) measurements, we have demonstrated directed nanoparticle assembly and manipulation in situ. This includes (a) directional assembly and electric field modulated re-orientation of disk-shaped gallium selenide nanoparticles using a nematic LC matrix, and (b) spectral modulation of chemically synthesized core shell CdSe/ZnS quantum dots (QDs) embedded in a cholesteric liquid crystal (CLC) matrix. Our work opens up the possibility of designing new QD based optical devices where spatial control of orientation, wavelength and polarization of the embedded QDs would allow great flexibility and added functionalities.

Citation Download Citation

A. L. Rodarte, C. G. L. Ferri, C. Gray, L. S. Hirst, and S. Ghosh "Directed assembly and in situ manipulation of semiconductor quantum dots in liquid crystal matrices", Proc. SPIE 8279, Emerging Liquid Crystal Technologies VII, 82790H (10 February 2012); https://doi.org/10.1117/12.906235

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available