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Fabrication and Defect Designs on DNA Linked 2-D Colloidal Photonic Crystals Using a Nd:YAG Pulsed Laser

Published online by Cambridge University Press:  26 February 2011

Ramazan Asmatulu ,
Sejong Kim ,
Robin Bright ,
Phillip Yu ,
Fotios Papadimitrakopoulos  and
Harris Marcus
Ramazan Asmatulu
Affiliation:
[email protected], UCONN, IMS, 97 N. Eagleville Road, Storrs, CT, 06268, United States, (860) 486-4410
Sejong Kim
Affiliation:
[email protected], University of Connecticut, Institute of Materials Science, United States
Robin Bright
Affiliation:
[email protected], University of Connecticut, Institute of Materials Science, United States
Phillip Yu
Affiliation:
[email protected], University of Connecticut, Institute of Materials Science, United States
Fotios Papadimitrakopoulos
Affiliation:
[email protected], University of Connecticut, Institute of Materials Science, United States
Harris Marcus
Affiliation:
[email protected], University of Connecticut, Institute of Materials Science, United States
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Abstract

Controlled defects were created on DNA linked 2-D colloidal photonic crystals using a Nd:YAG pulsed laser. The 2-D photonic crystals were self-assembled using 1.8 μm polystyrene (PS) microspheres on functionalized glass substrates. To synthesize the hexagonal close packed crystalline samples, both substrate and particles attached single-strand DNA, sequence A on the substrate and sequence B on the particles. The DNA was hybridized using the DNA linker with complementary single-strand A’B’ that anchored the particles to the substrate during self-assembly. The 532 nm second harmonic wavelength beam of the pulsed Nd:YAG laser (1064 nm) with a pulse width of 10 ns was used for the removal of individual colloidal particles from the self assembled photonic crystals. In the present tests, the diameter of the laser beam was optically reduced from 7 mm to about 1.8 μm. Controlled line defects and geometrical shapes (e.g., hexagonal and triangle) were created in the 2D arrays in an aqueous medium.

Keywords

colloidcrystallaser
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 901: Symposium R – Assembly at the Nanoscale – Toward Functional Nanostructured Materials , 2005 , 0901-Ra21-02
Copyright
Copyright © Materials Research Society 2006

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