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Current issue

ELEKTRO 12/2017 was released on December 6th 2017. Its digital version will be available on January 5th 2018.

Topic: Measurement, measuring devices and engineering; Testing and diagnostics

Main Article
Measurements on rotating machines using SFRA method
Application possibilities of ultra-capacitors or LiFePO4 batteries in trolley network of the Brno Public Transit Company

SVĚTLO (Light) 5/2017 was released on September 18th 2017. Its digital version will be available on September 18th 2017.

Luminaires and luminous apparatuses
MAYBE STYLE introducing LED design luminaires of German producer Lightnet
TREVOS – new luminaires for industry and offices
How many types of LED panels produces MODUS?
Intelligent LED luminaire RENO PROFI

Interiors lighting
The light in indoor flat interior – questions and answers

Researchers using 3D printed bacteria to make graphene-like material

27.03.2017 | 3ders | www.3ders.org

Researchers at the Delft University of Technology in the Netherlands are using 3D printed bacteria to create bespoke, graphene-like materials.

The secret to the new technique is bacteria—3D printed bacteria, to be precise. The researchers have discovered that bacteria can be deposited in precise lines using a 3D printer to turn graphene oxide—a compound of carbon, oxygen, and hydrogen—into a material that closely resembles graphene.

3D printing with bacteria

The trick is getting these bacteria to „reduce” the graphene oxide, by pulling oxygen atoms off the material as they metabolize. This process of reduction can also be achieved with heat or chemicals, but the researchers say that bacteria is cheaper and more eco-friendly.

The researchers hacked an ordinary desktop 3D printer to make it print bacteria onto a surface in precise lines just 1 millimeter wide. Printing bacteria is no mean feat, of course, and the researchers had to make a special concoction of E. coli mixed with a gel made from algae. They 3D printed this cocktail onto a dish containing calcium ions, and these calcium ions make the gel solidify upon contact. This keeps the bacteria exactly where they need to be.

Read more at 3ders

Image Credit: Delft University of Technology

-jk-