Issue 12, 2011
From the journal:

Nanoscale

Gradient inverse opal photonic crystals via spatially controlled template replication of self-assembled opals†

Siva Krishna Karuturi,a   Lijun Liu,a   Liap Tat Su,a   Alongkarn Chutinan,b   Nazir P. Kherani,*b   Taw Kuei Chan,c   Thomas Osipowiczc  and  Alfred Iing Yoong Tok*a  

* Corresponding authors

a School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore
E-mail: miytok@ntu.edu.sg

b The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, ON, Canada
E-mail: kherani@ecf.utoronto.ca

c Department of Physics, National University of Singapore, 21 Lower Kent Ridge Road, Singapore

Abstract

A method of spatially controlled template filling and replication is reported herein using Knudsen diffusion-limited atomic layer deposition (ALD). Experimental and theoretical investigations based on the porous framework of self-assembled polystyrene opals further confirm the well controlled z-directional TiO2 spatial gradients paving the way for the fabrication of gradient index inverse opal photonic crystals for the first time.

Graphical abstract: Gradient inverse opal photonic crystals via spatially controlled template replication of self-assembled opals

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Article information

DOI
https://doi.org/10.1039/C1NR11248A
Article type
Communication
Submitted
05 Sep 2011
Accepted
20 Oct 2011
First published
07 Nov 2011

Nanoscale, 2011,3, 4951-4954

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Gradient inverse opal photonic crystals via spatially controlled template replication of self-assembled opals

S. K. Karuturi, L. Liu, L. T. Su, A. Chutinan, N. P. Kherani, T. K. Chan, T. Osipowicz and A. I. Yoong Tok, Nanoscale, 2011, 3, 4951 DOI: 10.1039/C1NR11248A

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