Optical properties of DNA-CTMA biopolymers and applications in metal-biopolymer-metal photodetectors

Bin Zhou; Sung Jin Kim; Carrie M. Bartsch; Emily M. Heckman; Fahima Ouchen; Alexander N. Cartwright

doi:10.1117/12.892857

16 September 2011 Optical properties of DNA-CTMA biopolymers and applications in metal-biopolymer-metal photodetectors

Bin Zhou, Sung Jin Kim, Carrie M. Bartsch, Emily M. Heckman, Fahima Ouchen, Alexander N. Cartwright

Proceedings Volume 8103, Nanobiosystems: Processing, Characterization, and Applications IV; 810308 (2011) https://doi.org/10.1117/12.892857
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

The potential of using a DNA biopolymer in an electro-optic device is presented. A complex of DNA with the cationic surfactant cetyltrimethylammonium-chloride (CTMA) was used to obtain an organic-soluble DNA material (DNA-CTMA). Poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) was added to the DNACTMA to increase the electrical conductivity of the biopolymer. The CW absorbance and time-resolved photoluminescence of the resulting DNA-CTMA and DNA-CTMA-PEDOT:PSS were investigated. Both DNA materials have absorbance peaks at ~260 nm and a broad, Stokes shifted, photoluminescence peak around 470nm. The photoluminescence lifetime of the materials was observed to decrease with increasing UV excitation. Specifically, excitation with a high power ultrafast (~150fs) UV (266nm) laser pulse resulted in a drastic decrease in the photoluminescence lifetime decreases after a few minutes. Moreover, the observed decrease was faster in an air ambient than in a nitrogen ambient. This is most likely due to photo-oxidation that degrades the polymer surface resulting in an increase in the non-radiative recombination. In order to investigate the photoconductivity of these two materials, metal-biopolymer-metal (MBM) ultraviolet photodetectors with interdigitated electrodes were fabricated and characterized. The photoresponsivity of these devices was limited by the transport dynamics within the film. The prospects for the use of these materials in optical devices will be discussed.

Citation Download Citation

Bin Zhou, Sung Jin Kim, Carrie M. Bartsch, Emily M. Heckman, Fahima Ouchen, and Alexander N. Cartwright "Optical properties of DNA-CTMA biopolymers and applications in metal-biopolymer-metal photodetectors", Proc. SPIE 8103, Nanobiosystems: Processing, Characterization, and Applications IV, 810308 (16 September 2011); https://doi.org/10.1117/12.892857

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available