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E u r o S c i C o n C o n f e r e n c e o n
Nanotechnology &
Smart Materials
Nano Research & Applications
ISSN 2471-9838
O c t o b e r 0 4 - 0 6 , 2 0 1 8
Am s t e r d a m , N e t h e r l a n d s
Nanotechnology & Smart Materials 2018
Page 36
T
he key challenge for producing nanostructures based commercial healthcare
applications is the scaling up of the fabrication process. We present the fab-
rication 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 (Fig. 1). Using this quick, scale and
economical method we produced several wearable contact lens sensors. These
contact lens based holographic sensors can be used for monitoring the eye cur-
vature and pressure of glaucoma patients. The holograms can also be functional-
ized to sense glucose concentrations in the tears of diabetic patients. The findings
have been reported in highly reputable journals 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. Through laser ablation,
ordered 3D geometries/patterns were written within the polymer layers. These re-
configurable geometries act as holographically recorded optical devices
Biography
Haider Butt is serving as a Senior Lecturer at the University of
Birmingham, UK, where he is leading a Nanophotonics group
with particular interests in healthcare technologies. Previously,
he was a Henslow Research Fellow at the University of Cam-
bridge, from where he also received his PhD in April 2012. He
has published over 100 papers in various peer-reviewed jour-
nals and has around 40 conference publications. His research
work has received substantial recognition in the formof awards
and media interviews. He has secured several prestigious re-
search awards including Philip Leverhulme Prize.
h.butt@bham.ac.ukPrinting nanostructures on contact lenses
for wearable diagnostics
Haider Butt
University of Birmingham, UK
Haider Butt, Nano Res Appl Volume:4
DOI: 10.21767/2471-9838-C6-024
Figure 1:
(a) Holographic laser ablation process, (b) the nonpatterns
produced, (c-e) holograms printed on commercial contact lenses