electron microscope – Shamskm: A site to exchange knowledge and solutions

The Virus That Makes a Disposable Syringe

By Guest PostDecember 28, 2013Sciencealpha helical molecules, application, bacteria, bacterial cell, bacteriophage, bentley fane, century long mystery, cryo electron tomography, DNA, dna transmitting structure, e coli bacteria, electron microscope, erica zbornik, host cells, infection, lindsey n young, michael rossmann, Nanotechnology, noninfectious, phix174, prey, purdue university, t7, tube shaped structure, university of arizona, viral, virus, xinzheng zhang

For decades, no one knew how a virus that preys on bacteria transfers its DNA into the host cells because it appeared to lack the structures other viruses use for that process. Now researchers have discovered how the virus does it – using a structure that might hold applications for nanotechnology.

A research team led by the University of Arizona and Purdue University has discovered something very unique about a virus that has been studied for decades: It has the ability to grow a temporary tube-shaped structure, enabling it to inject its DNA into the bacteria on which it preys. (more…)

How Butterfly Wings Can Inspire New High-Tech Surfaces

By Guest PostNovember 11, 2012Nature, Scienceaircraft, bacteria, bharat bhushan, butterfly, butterfly wings, catheter, coated, crude oil, electron microscope, fluid flow, giant blue, gregory bixler, high tech surfaces, iconic butterfly, industrial powder, jo mcculty, medical equipment, micrometer scale feature, microscopic texture, morpho butterfly, morpho didius, nano channel, Nanotechnology, Nature, ohio, ohio state university, oriza sativa, pipelines, plastic surface, rice leaves, silicon carbide powder, south american, watercraft, wings

COLUMBUS, Ohio – A South American butterfly flapped its wings, and caused a flurry of nanotechnology research to happen in Ohio.

Researchers here have taken a new look at butterfly wings and rice leaves, and learned things about their microscopic texture that could improve a variety of products.

For example, the researchers were able to clean up to 85 percent of dust off a coated plastic surface that mimicked the texture of a butterfly wing, compared to only 70 percent off a flat surface. (more…)

First Atomic-Scale Real-Time Movies of Platinum Nanocrystal Growth in Liquids

By Guest PostApril 23, 2012Sciencealex zettl, alivisatos zettl collaboration, anisotropic particle, atomic scale, berkeley lab, crystallographic direction, daniel hellebusch, DNA, electron beam, electron microscope, gold tem mesh, grapheme, graphene liquid cells, growth, growth trajectory, jeong yong lee, jong min yuk, jungwon park, kwanpyo kim, liquid, lynn yarris, membrane, metal, michael crommie, movie, nanocrystal, nanometer scale, nanoparticle growth, ncem, paul alivisatos, peter ercius, platinum nanocrystal, protein, real-time, solution, subnanometer resolution, tem grid, transmission electron microscope, university of california

Berkeley Scientists Create Graphene Liquid Cells for Electron Microscopy Studies of Nanocrystal Formation

They won’t be coming soon to a multiplex near you, but movies showing the growth of platinum nanocrystals at the atomic-scale in real-time have blockbuster potential. A team of scientists with the Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley has developed a technique for encapsulating liquids of nanocrystals between layers of graphene so that chemical reactions in the liquids can be imaged with an electron microscope. With this technique, movies can be made that provide unprecedented direct observations of physical, chemical and biological phenomena that take place in liquids on the nanometer scale. (more…)

Microprocessors From Pencil Lead

By Guest PostMarch 31, 2012Scienceatomic scale, boron nitride, brian leroy, credit card, electron, electron microscope, electronic circuit, grapheme, graphene age, graphite, matthew yankowitz, nano-scale, pencil lead, quantum mechanical effect, relativistic, relativistic quantum effect, semiconductor, sheets of graphite

UA physicists are making discoveries that may advance electronic circuit technology.

Graphite, more commonly known as pencil lead, could become the next big thing in the quest for smaller and less power-hungry electronics.

Resembling chicken wire on a nano scale, graphene – single sheets of graphite – is only one atom thick, making it the world’s thinnest material. Two million graphene sheets stacked up would not be as thick as a credit card. (more…)

Tag Archives: electron microscope

The Virus That Makes a Disposable Syringe

How Butterfly Wings Can Inspire New High-Tech Surfaces

First Atomic-Scale Real-Time Movies of Platinum Nanocrystal Growth in Liquids

Microprocessors From Pencil Lead