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Applied Physics Letters / Volume 99 / Issue 25 / ORGANIC ELECTRONICS AND PHOTONICS
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Appl. Phys. Lett. 99, 253301 (2011); http://dx.doi.org/10.1063/1.3671153 (3 pages)

Photoinduced write-once read-many-times memory device based on DNA biopolymer nanocomposite

Yu-Chueh Hung1, Wei-Ting Hsu1, Ting-Yu Lin1, and Ljiljana Fruk2

1Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan
2DFG-Centre for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), D-76131 Karlsruhe, Germany

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(Received 26 September 2011; accepted 30 November 2011; published online 19 December 2011)

We demonstrate a photoinduced write-once read-many-times (WORM) organic memory device based on DNA biopolymer nanocomposite. The device consists of a single biopolymer layer sandwiched between electrodes, in which electrical bistability is activated by in situ formation of silver nanoparticles embedded in biopolymer upon light irradiation. The device exhibits a switching effect to high conductivity above a threshold of 2.6 V and a good retention property. This facile technique, taking advantage of DNA’s affinity for metals and solution processing, can optically manipulate the properties of DNA nanocomposite thin films, which holds promise for optical storage and plasmonic applications.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

DNA, nanoelectronics, nanoparticles, optical polymers, optical storage, plasmonics, polymer films, thin film devices

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3671153

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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Figures (click on thumbnails to view enlargements)

FIG.1
(Color online) An illustration of the memory device consisting of a thin DNA biopolymer film sandwiched between electrodes. The memory-switching effect is activated upon light irradiation.

FIG.1 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.2
(Color online) (a) UV-VIS spectra of DNA-CTMA and photoinduced DNA-CTMA:Ag. (b) TEM image of Ag NPs grown in DNA biopolymer under irradiation for 1 min, (c) 5 min, and (d) 10 min.

FIG.2 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.3
(Color online) Current-voltage (I-V) curve of devices under 1, 5, and 10 min of UV exposure time. Inset: I-V curve of device without UV irradiation.

FIG.3 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.4
(Color online) I-V curves of the device in log-log scale. The scatters are experimental data and the straight lines are the fitting curves from the theoretical models.

FIG.4 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.5
(Color online) Retention characteristic of the OFF- and ON-state of fabricated device read at 1 V.

FIG.5 Download High Resolution Image (.zip file) | Export Figure to PowerPoint



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