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Archive for the 'Nanotech' Category

Powerful nanoengine built from coated nanoparticles

Posted by Jim Lewis on June 5th, 2016

A nanoengine 100 times more powerful than known nanomotors and muscles was demonstrated using the aggregation and dispersal of gold nanoparticles coated with a polymer that undergoes a rapid transition from hydrophobic to hydrophilic.

Foresight Co-Founder to speak on altruism, nanotechnology

Posted by Jim Lewis on May 28th, 2016

Christine Peterson will speak on “High-Leverage Altruism” at the fourth annual conference of Effective Altruism, using reason and evidence to improve the world as much as possible, and on nanotechnology at the Singularity University Global Summit, the definitive gathering for those who understand the critical importance of exponential technologies.

Foresight President to speak on Artificial Intelligence

Posted by Jim Lewis on May 10th, 2016

Foresight President Julia Bossmann will speak on AI at the TEDxEchoPark “Paradigm Shift” event on Saturday May 14, 2016, in Los Angeles, California.

Triple helices stabilize macroscopic crystals for DNA nanotechnology

Posted by Jim Lewis on May 5th, 2016

A DNA strand capable of forming a triple helix with a portion of the DNA double helices in a macroscopic DNA crystal enhances the weak interactions holding the crystal together so that the crystal remains stable in the absence of a high ionic strength environment.

DNA triplex formation decorates DNA crystals with sub-nanometer precision

Posted by Jim Lewis on May 3rd, 2016

A specially designed triplex forming oligonucleotide bearing a cargo molecule binds to a specific sequence in the major groove of a DNA double helix to form a modified DNA tile that self assembles into a macroscopic crystal in which each helix carries a cargo molecule positioned to sub-nanometer precision.

Macroscopic DNA crystals from molecular tensegrity triangles

Posted by Jim Lewis on May 2nd, 2016

Structural DNA nanotechnology: progress toward a precise self-assembling three dimensional scaffold by building macroscopic crystals from nanoscale structures.

Five ionized atoms provide scalable implementation of quantum computation algorithm

Posted by Jim Lewis on April 3rd, 2016

Five calcium ions held several micrometers apart in an ion trap and manipulated by laser pulses implement Shor’s factorization algorithm more efficiently than previous implementations.

DNA nanotechnology defeats drug resistance in cancer cells

Posted by Jim Lewis on April 2nd, 2016

Small, stiff, rectangular rods made using scaffolded DNA origami bypass drug resistance mechanisms in the membranes of a cultured leukemia cell line and release enough therapeutic drug to kill the cancer cell.

Nanotechnologies to advance solar energy utilization

Posted by Jim Lewis on March 25th, 2016

Increasing efficiency and utilization and lowering costs for harvesting, converting, transporting, and storing energy produced from sunlight provides a showcase for a variety of nanoscale materials, structures, and processes.

Caltech celebrates ten years of Scaffolded DNA Origami

Posted by Jim Lewis on March 14th, 2016

California Institute of Technology is holding a symposium to honor Paul Rothemund’s seminal contribution to the field of DNA nanotechnology: the research paths opened by the technology, and where they might lead.

Crowd-sourced RNA structure design uncovers new insights

Posted by Jim Lewis on March 12th, 2016

Thousands of amateurs playing the online RNA folding game Eterna, backed up by a real-world automated lab testing their predictions, have provided insights to improve the algorithms computers use to design RNA molecules.

Will medical 3D printing advance nanotechnology?

Posted by Jim Lewis on March 12th, 2016

Do sophisticated medical applications of 3D printing, like printing titanium bones or human tissues, that portend wider use, also perhaps point toward eventual nanoscale applications as the technology improves?

Tightly-fitted DNA parts form dynamic nanomachine

Posted by Jim Lewis on March 10th, 2016

A rotor with DNA origami parts held together by an engineered tight fit instead of by covalent bonds can revolve freely, driven by Brownian motion and dwelling at engineered docking sites.

DNA nanotechnology provides new ways to arrange nanoparticles into crystal lattices

Posted by Jim Lewis on February 19th, 2016

Two research teams present two different methods for using single strands of DNA to link various nanoparticles into complex 3D arrays: one using DNA hairpins for dynamic reconfiguration and the other using a DNA origami scaffold.

Improving crystallographic resolution through using less perfect crystals

Posted by Jim Lewis on February 18th, 2016

A paradigm shift in analyzing diffraction from smaller, less perfect crystals yields improved resolution and enables directly determining the phase of the diffraction pattern.

DNA nanotechnology cages localize and optimize enzymatic reactions

Posted by Jim Lewis on February 16th, 2016

Encapsulating enzymes in nanocages engineered using structural DNA nanotechnology increases enzymatic digestion and protects enzymes from degradation.

Roles of materials research and polymer chemistry in developing nanotechnology

Posted by Jim Lewis on February 16th, 2016

Polymer chemistry and materials research provide opportunities to explore structures that harmonize phenomena unique to nanoscale technology, the role of mechanical forces generated at interfaces, and the responses of biological systems to mechanical stresses.

Multiple advances in de novo protein design and prediction

Posted by Jim Lewis on February 14th, 2016

New families of protein structures, barrel proteins for positioning small molecules, self-assembling protein arrays, and precision sculpting of protein architectures highlight de novo protein design advances.

Rational design of protein architectures not found in nature

Posted by Jim Lewis on February 11th, 2016

Computational design of proteins satisfying predetermined geometric constraints produced stable proteins with the designed structure that are not found in nature.

De novo protein design space extends far beyond biology

Posted by Jim Lewis on February 3rd, 2016

A fully automated design protocol generates dozens of designs for proteins based on helix-loop-helix-loop repeat units that are very stable, have crystal structures that match the design, have very different overall shapes, and are unrelated to any natural protein.