Scientists combine synthetic and biological nanoparticles to produce new metamaterials
Aalto University scientists have organized synthetic and biological building blocks in a single structure - combining virus particles (and other protein cages) with inorganic nanoparticles to form crystalline layer structures, or superlattices.
The research aims to develop hierarchically structured nanomaterials with tunable optical, magnetic, electronic and catalytic properties. Such nanomaterials are important for applications in sensing, optics, electronics and drug delivery.
By generating biohybrid 3D superlattices of nanoparticles and proteins, "the versatility of synthetic nanoparticles and the highly controlled assembly properties of biomolecules can be combined," explains Dr Mauri Kostiainen of Aalto University Department of Applied Physics, who led the research.
"Binary nanoparticle lattices have received so much attention because they can provide a way to prepare multifunctional metamaterials - periodic artificial materials not found in nature. In them, new properties arise from collective behaviour," explains Kostiainen.
For example, they showed that virus or ferritin protein cages can be used to guide the assembly of RNA molecules or iron oxide nanoparticles into superlattices, formed through tunable electrostatic interactions with charged gold nanoparticles.
"The gold nanoparticles and viruses adopt a special kind of crystal structure that doesn’t correspond to any known atomic or molecular crystal structure and it has previously not been observed with nano-sized particles," said Kostiainen.
In bringing these kind of new materials to fruition, scientists turn the usually unwanted properties of viruses into something very useful, by employing the unique capability of highly controlled self-assembly of the virus particles.
"Aalto University-led research group shows that CCMV virus or ferritin protein cages can be used to guide the assembly of RNA molecules or iron oxide nanoparticles into three-dimensional binary superlattices. The lattices are formed through tuneable electrostatic interactions with charged gold nanoparticles."
US Silent on Psychologists Role in CIA’s Tortures: Doctors 2014-12-20 21:53
Physicians for Human Rights had not received any response from the US Federal Commission to their call to investigate the role of health professionals in CIA’s torture program, Deputy Director of the organization told Sputnik.
December 19 (Sputnik) — US government has not responded to calls to prosecute doctors, who participated in CIA torture program, the Deputy Director of Communications for ...
Former Chief Security Officer for NewsCorp: N. Koreans Not Behind Sony Hack, Interview Leak 2014-12-20 2:17
Hemanshu Nigam, a former federal prosecutor and former chief security officer for NewsCorp/Fox studios, says North Korea isn’t behind the Sony Hack.
Nigam gave several bullet points for why the hack was likely an inside job.
Attack code borrowed from a previous attack on Seoul, that’s why it’s in Korean. Private hackers typically borrow malicious code from other hackers.Nations state attacks follow ...
Sony Fires Back at Obama: Actually We Did Call the White House – Several Times 2014-12-20 2:13 Sony fired back at Obama after the press conference saying they had several conversations with the Obama White House before and after the movie was canceled.
Via The Hollywood Reporter:
After President Obama criticized Sony for its decision to cancel The Interview's release after theater chains decided not to show the film, the studio has issued a statement elaborating on the move.
The Bankster International 2014-12-20 1:55 Geopolitical analysis, the art of explaining power relationships through the prism of impersonal geography, can be a helpful tool for observers of the Great Game – but it also has its limitations. A case in point is the renewed US-Russia confrontation. Think tanks and policy insiders easily sell the narrative that from the dark days of the Cold War to ...