Navigation Links
Light makes write for DNA information-storage device
Date:1/5/2012

In an effort to make data storage more cost-effective, a group of researchers from National Tsing Hua University in Taiwan and the Karlsruhe Institute of Technology in Germany have created a DNA-based memory device that is "write-once-read-many-times" (WORM), and that uses ultraviolet (UV) light to make it possible to encode information. The device, described in a paper accepted to the AIP's Applied Physics Letters, consists of a thin film of salmon DNA that has been embedded with silver nanoparticles and then sandwiched between two electrodes. Shining UV light on the system enables a light-triggered synthesis process that causes the silver atoms to cluster into nano-sized particles, and readies the system for data encoding. In some cases, using DNA may be less expensive to process into memory devices than using traditional, inorganic materials like silicon, the researchers say.

At first, when no voltage or low voltage is applied through the electrodes to the UV-irradiated DNA, only a low current is able to pass through the composite; this corresponds to the "off" state of the device. But the UV irradiation makes the composite unable to hold charge under a high electric field, so when the applied voltage exceeds a certain threshold, an increased amount of charge is able to pass through. This higher state of conductivity corresponds to the "on" state of the device.

The team found that this change from low conductivity ("off") to high conductivity ("on") was irreversible: once the system had been turned on, it stayed on, no matter what voltage the team applied to the system. And once information is written, the device appears to retain that information indefinitely: the researchers report that the material's conductivity did not change significantly during nearly 30 hours of tracking. The authors hope the technique will be useful in the design of optical storage devices and suggest that it may have plasmonic applications as well.


'/>"/>
Contact: Jennifer Lauren Lee
jlee@aip.org
301-209-3099
American Institute of Physics
Source:Eurekalert

Page: 1

Related biology news :

1. Sunlight and bunker oil a fatal combination for Pacific herring
2. Viagra against heart failure: Researchers at the RUB and from Rochester throw light on the mechanism
3. Future is bright for ONRs lightweight, sun-powered generator
4. Barracuda babies: Novel study sheds light on early life of prolific predator
5. New light on medicinal benefits of plants
6. Dinosaurs with killer claws yield new theory about flight
7. How exposure to irregular light affects plant circadian rhythms
8. Making a light-harvesting antenna from scratch
9. Lighting the way to understanding the brain
10. Graphene lights up with new possibilities
11. Shedding light on the dark matter of the genome
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/3/2017)... April 3, 2017  Data captured by ... platform, detected a statistically significant association between ... to treatment and objective response of cancer ... to predict whether cancer patients will respond ... as well as to improve both pre-infusion potency ...
(Date:3/30/2017)... , March 30, 2017 Trends, opportunities and ... and behavioral), by technology (fingerprint, AFIS, iris recognition, facial ... and others), by end use industry (government and law ... financial and banking, and others), and by region ( ... , Asia Pacific , and the ...
(Date:3/27/2017)... March 27, 2017  Catholic Health Services (CHS) ... Systems Society (HIMSS) Analytics for achieving Stage 6 ... sm . In addition, CHS previously earned a ... using an electronic medical record (EMR). ... level of EMR usage in an outpatient setting.  ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... At its ... announced Dr. Suneel I. Sheikh, the co-founder, CEO and chief research scientist of ... been selected for membership in ARCS Alumni Hall of Fame . ASTER ...
(Date:10/11/2017)... Md. (PRWEB) , ... October 11, 2017 , ... ... digital pathology, announced today it will be hosting a Webinar titled, “Pathology is ... Advanced Pathology Associates , on digital pathology adoption best practices and how Proscia ...
(Date:10/11/2017)... ... 2017 , ... A new study published in Fertility and ... in vitro fertilization (IVF) transfer cycles. The multi-center matched cohort study ... comparing the results from the fresh and frozen transfer cohorts, the authors of ...
(Date:10/10/2017)... ... October 10, 2017 , ... For the second ... a US2020 STEM Mentoring Award. Representatives of the FirstHand program travelled to Washington, ... from US2020. , US2020’s mission is to change the trajectory of STEM education ...
Breaking Biology Technology: