To view this presentation:

  • If you have an MRS account, click the Login button above.
  • New to MRS?  Create a free account here



  0       0

2014 MRS Spring Meeting


Z8.04 - Bio-Organic Interfaces for Cell Photo-Stimulation: Toward the Organic Artificial Retina


Apr 24, 2014 9:15am ‐ Apr 24, 2014 9:45am

Description

This talk introduces the use of organic semiconductors as artificial photoreceptors in biomimetic devices. The research started some years ago by demonstrating that organicsemiconductors can be used to reproduce the natural retina photoreceptor spectral response in standard photo-diodes [1]. Second step was the development of hybrid solid liquid photodiodes that can naturally interface with a biological environment through the electronic/ionic interface [2]. The next step was demonstrating that primary neurons (from rat brain) grown on top of a photovoltaic semiconducting polymer acquire light sensitivity [3]. This occurs through a specific mechanism of cell stimulation by polymer photoexcitation (CSP) that will be discussed in the presentation. We then studied explanted retinas put in contact with our organic device. We will show that blind retinas, i.e. retinas with severe damage of the photoreceptors, do regain light sensitivity, as demonstrated by ganglion cell electrical activity upon illumination [4]. The process, its relation to CSP, perspective and future developments will be discussed.

[1] M. Antognazza et al., Appl. Phys. Lett. 90, 163509 (2007)

[2] M. Antognazza et al., Appl. Phys. Lett. 94, 243501 (2009)

[3] Diego Ghezzi et al., Nat. Commun.2,166 (2011)

[4] Diego Ghezzi et al., Nat. Photonics 7, 400 (2013)

Speaker(s):

You must be logged in and own this session in order to post comments.

Print Certificate
Review Answers
Print Transcript
Completed on: token-completed_on
Review Answers
Please select the appropriate credit type:
/
test_id: 
credits: 
completed on: 
rendered in: 
* - Indicates answer is required.
token-content

token-speaker-name
token-index
token-content
token-index
token-content
token-index
token-content
token-index
token-content
token-index
token-content
token-index
token-content
/
/
token-index
token-content
token-index
token-content