Controlled synthesis of zinc selenide nanostructures using oil-water-amphiphilic block copolymer liquid crystals

Georgios N. Karanikolos, Paschalis Alexandridis, T. J. Mountziaris

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

A technique for simultaneous size and shape control of compound semiconductor nanostructures using poly (ethylene oxide)-poly (propylene oxide)-poly (ethylene oxide) block copolymer/water/p-xylene lyotropic liquid crystals as templates is reported. Luminescent quantum dots of ZnSe were grown in the spherical domains of reverse (water-in-oil) cubic liquid crystals, hollow nanospheres and hollow nanotubes were grown around the dispersed spherical and cylindrical oil domains of the normal (oil-in-water) cubic and hexagonal phases respectively, and free-standing quantum wells (nanoplates or nanolaminates) were grown in the lamellar liquid crystals. The ZnSe nuclei were formed at room temperature by a spontaneous and irreversible reaction between zinc acetate that was dissolved in the water phase, and hydrogen selenide that was allowed to diffuse into the liquid crystalline templates. The nanostructures were characterized by HR-TEM, XRD, and optical spectroscopy. The shape of the nanocrystals can be controlled by selecting the structure of the templating phase. The size of the nanocrystals can be controlled by the size of the nanodomains and the concentration of the zinc precursor in them.

Original languageBritish English
Title of host publicationColloidal Materials
Subtitle of host publicationSynthesis, Structure, and Applications
PublisherMaterials Research Society
Pages8-13
Number of pages6
ISBN (Print)1558998993, 9781558998995
DOIs
StatePublished - 2006
Event2006 MRS Spring Meeting - San Francisco, CA, United States
Duration: 17 Apr 200621 Apr 2006

Publication series

NameMaterials Research Society Symposium Proceedings
Volume942
ISSN (Print)0272-9172

Conference

Conference2006 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA
Period17/04/0621/04/06

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