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Genetically engineered bacteria can fabricate bio-nanowires - Could be used in future biodevices

Scientists at the University of Massachusetts Amherst report in the current issue of Small that they have genetically designed a new strain of bacteria that spins out extremely thin and highly conductive wires made up solely of non-toxic, natural amino acids.

Researchers led by microbiologist Derek Lovley say the wires, which rival the thinnest wires known to man, are produced from renewable, inexpensive feedstocks and avoid the harsh chemical processes typically used to produce nanoelectronic materials.

Lovley says, “New sources of electronic materials are needed to meet the increasing demand for making smaller, more powerful electronic devices in a sustainable way.”

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Ref: Synthetic Biological Protein Nanowires with High Conductivity. Small (13 July 2016) | DOI: 10.1002/smll.201601112

ABSTRACT

Genetic modification to add tryptophan to PilA, the monomer for the electrically conductive pili of Geobacter sulfurreducens, yields conductive protein filaments 2000-fold more conductive than the wild-type pili while cutting the diameter in half to 1.5 nm.

Sehun:*scans the girl from her head to her toes* Not bad hyung, not bad! But those shoes.. so last year!

Kai:*tries to make smll conversation with her* We were about to eat…we have chicken if you want!

Y/N: I don’t…
Kai: Yeah chicken is not your style either!I should have known!

Tao: That should be me……

Kyungsoo:*planning world domination*

Kai: Hyung did you heard what Kris said?

Kyungsoo:That he’s an idiot?

Chanyeol:She’s so tiny and cute! She looks like a fairy.Can I hug her hyung?

Chen: *doesn’t give a  shit*

Baekhyun: Look at those big, pretty eyes of yours. You remind me of Lulu. Doesn’t she guys?

Lay:*gets shy and nervous around her* So do you come here often…

Kris: Yes yes she’s beautiful and she’s mine! She’s the only star in my galaxy!

Suho: *disappointed umma* But I thought we had something! 

Luhan: What do you mean she looks like me? I’m more manly right? Guys?

Xiumin: The only star?Then your galaxy must be really smal!

VIDEO: Researchers can now 3D print graphene aerogels

3D printing of a graphene aerogel with true 3D overhang structures is highlighted. The aerogel is fabricated by combining drop-on-demand 3D printing and freeze casting. The water-based GO ink is ejected and freeze-cast into designed 3D structures.

Ref: 3D Printing of Graphene Aerogels. Small (10 February 2016) | DOI: 10.1002/smll.201503524

ABSTRACT

3D printing of a graphene aerogel with true 3D overhang structures is highlighted. The aerogel is fabricated by combining drop-on-demand 3D printing and freeze casting. The water-based GO ink is ejected and freeze-cast into designed 3D structures. The lightweight (<10 mg cm−3) 3D printed graphene aerogel presents superelastic and high electrical conduction.