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Journal of Materials Science and Nanotechnology | Volume: 3
March 20-21, 2019 | London, UK
Materials Science and Materials Chemistry
2
nd
International Conference on
T
he key challenge for producing nanostructures based
commercial healthcare applications is the scaling up of
the fabrication process. We present the fabrication of dye
based nanostructures by using the fast and commercially
viable method of holographic laser ablation. In this method
we use a single beam of a nanosecond laser, which after
reflecting from a mirror self-interferes. This results in an
interference pattern which can be used to ablate well-
ordered gratings in thin films. The period of the grating is
determined by the incident wavelength (λ) and tilt angle
(θ) of the sample with respect to normal incidence. In this
manner we recorded various holographic nanopatterns onto
transparent substrates, such as glasses and commercial
contact lenses. Using this quick, scale and economical
method we produced several wearable contact lens sensors.
1,2 These contact lens based holographic sensors can be used
for monitoring the eye curvature and pressure of glaucoma
patients. The holograms can also be functionalized to sense
glucose concentrations in the tears of diabetic patients. The
findings have been reported in highly reputable journals
1,2 and have also received a lot of media attention. The
approach was also extended into 3D patterning by ablating
3D assemblies of Ag nanoparticles within polymer media.3
Through laser ablation, ordered 3D geometries/patterns
were written within the polymer layers. These reconfigurable
geometries act as holographically recorded optical devices.
Speaker Biography
Haider Butt is a Senior Lecturer at the University of Birmingham, UK, where he is leading a
nanophotonicsgroupwithparticular interests inhealthcaretechnologies.Previouslyhewas
a Henslow Research Fellow at the University of Cambridge, fromwhere he also received his
PhD in April 2012. He has published over 100 peer-reviewed journal papers and around
40 conference publications. His research work has received substantial recognition in the
form of awards and media interviews. He has secured several prestigious research awards
include Philip Leverhulme Prize.
e:
h.butt@bham.ac.ukHaider Butt
University of Birmingham, UK
Printing nanostructures on contact lenses for wearable diagnostics