Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Contact lens with integrated inorganic semiconductor device

Abstract:
Conventional contact lenses are simple polymer structures primarily used for the correction of vision. The integration of function into the structure of a contact lens opens a number of intriguing venues such as incorporation of a semi-transparent display directly on the structure of a contact lens or the inclusion of a bio-sensor directly on the surface of the cornea. Contact lens have been tested and used biocompatible for use in a rabbit eye [1].

Contact lens with integrated inorganic semiconductor device

Napoli, Italy | Posted on August 24th, 2009

After the experiment we are try to install the electronic circuit on a contact lens for use human. The integration on contact lens with embedded electronics, optoelectronics, or sensors, in addition to vision correction, can act as a head-up display (HUD) or a medical sensing instrument. Automakers have begun incorporating HUDs into their cars for the purpose of displaying data such as vehicle speed directly onto the windshield. The idea is to create a safer driving experience by allowing the driver to stay focused on the road while having all pertinent information directly in his field of vision [1].
All HUD systems in use today require sizeable pieces of equipment that are not very portable and infringe on the user's mobility. By placing portions of a HUD system onto a contact lens, and precisely LED (light emitting diode) display, on the contact lens, it is possible to create a system that is compact, portable, and discrete.
The same benefits can be realized when using the contact lens as a medical instrument. Glucose sensors for example, among other sensors, can be placed onto the contact to provide early warnings to diabetics.
Contact lens with integrate display can give information of the viability, by HUD's, to the driver.
Video-game companies could use the contact lenses to completely immerse players in a virtual world without restricting their range of motion [1]. We offer a set of technique based on self-assembly here that allow for incorporation of various functions onto a contact lens.
Contact lens is made of polyethylene terephthalate (PET) that is a thermoplastic polymeric resin used for synthetic fibre, member of the family of polyesters that are a class of polymers that contained a ester group in their main chain.
Such an integrated device would presently have a wide range of uses for biological and chemical analysis and may open doors for new applications in the future. Final platform is composted of unconventional substrate utilizing simply fabrication technique and common materials such as plastic or glass used to fluorescence detection that is the primary method of molecular sensing and characterization in biology today.
After the self-assembly process, the surface is encapsulated with a biocompatible material, polymethyl methacrylate (PMMA). Once passivated, the flat substrate with embedded electronics is placed into a heated aluminum mold and pressed so that a permanent curvature is imparted onto the plastic creating the contact lens. The lens is then sterilized and tested in a rabbit's eye that represent animal model of this experiment.
Bibliography

[1] Contact lens with integrated inorganic
semiconductor devices Ho, H. Saeedi, E. Kim,
S.S.Shen, T.T. Parviz, B.A.
Micro Electro Mechanical Systems
IEEE 21st International Conference on 403-406 Jan. 2008
[2] S.A. Stauth, B.A. Parviz, "Self-assembled singlecrystal
silicon circuits on plastic", Proceedings of the
National Academy of Sciences, vol. 103, pp. 13922-
13927, 2006.
[3] S.S. Kim, E. Saeedi, D.R. Meldrum, B.A. Parviz, "Self-
Assembled Heterogeneous Integrated Fluorescence
Detection System", proceedings of the 2nd Annual
IEEE International Conference on Nano/Micro
Engineered and Molecular Systems, pp. 927-931, 2007.
[4] B. Monemar, K.K. Shih, G.D. Pettit, "Some optical
properties of the AlxGa1-xAs alloy system", Journal of
applied physics, vol.47, no.6, 1976.
[5] X. Wu, L. Coldren, J. Merz, "Selectrive etching
characteristics of HF for AlxGa1-xAs," Electronics
Letters, vol. 21, pp 558-559, 1985.
[6] Ehsan Saeedi1*, Samuel S. Kim1, James R. Etzkorn,
Dierdre R. Meldrum2, Fellow, IEEE, and Babak A. Parviz1
Automation and yield of micron-scale self-assembly processes
IEEE Conference on Automation Science and Engineering
Scottsdale, AZ, USA, Sept 22-25, pp. 375-380, 2007.

Dott. Giovanni Romano
University Federico II Naples Italy

####

For more information, please click here

Contacts:
Giovanni Romano
Phone: 3478389514

or

Copyright © Univ. Federico II

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Display technology/LEDs/SS Lighting/OLEDs

New technology using silver may hold key to electronics advances July 2nd, 2015

News and information

Discovery of nanotubes offers new clues about cell-to-cell communication July 2nd, 2015

Nanospiked bacteria are the brightest hard X-ray emitters July 2nd, 2015

Engineering the world’s smallest nanocrystal July 2nd, 2015

Producing spin-entangled electrons July 2nd, 2015

Nanomedicine

Iranian Scientists Find Simple, Economic Method to Synthesize Antibacterial Nanoparticles July 2nd, 2015

Leti Announces Launch of First European Nanomedicine Characterisation Laboratory: Project Combines Expertise of 9 Partners in 8 Countries to Foster Nanomedicine Innovation and Facilitate Regulatory Approval July 1st, 2015

Carnegie Mellon chemists characterize 3-D macroporous hydrogels: Methods will allow researchers to develop new 'smart' materials June 30th, 2015

Chitosan coated, chemotherapy packed nanoparticles may target cancer stem cells June 30th, 2015

Sensors

New micro-supercapacitor structure inspired by the intricate design of leaves: A team of scientists in Korea has devised a new method for making a graphene film for supercapacitors July 2nd, 2015

Carnegie Mellon chemists characterize 3-D macroporous hydrogels: Methods will allow researchers to develop new 'smart' materials June 30th, 2015

Visible Light-Sensitive Photocatalysts Used for Purification of Contaminated Water in Iran June 30th, 2015

Graphene breakthrough as Bosch creates magnetic sensor 100 times more sensitive than silicon equivalent June 28th, 2015

Discoveries

Freezing single atoms to absolute zero with microwaves brings quantum technology closer: Atoms frozen to absolute zero using microwaves July 2nd, 2015

New technology using silver may hold key to electronics advances July 2nd, 2015

Discovery of nanotubes offers new clues about cell-to-cell communication July 2nd, 2015

Nanospiked bacteria are the brightest hard X-ray emitters July 2nd, 2015

Announcements

Nanospiked bacteria are the brightest hard X-ray emitters July 2nd, 2015

Engineering the world’s smallest nanocrystal July 2nd, 2015

Producing spin-entangled electrons July 2nd, 2015

NIST Group Maps Distribution of Carbon Nanotubes in Composite Materials July 2nd, 2015

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project