Atomic bond types discernible in images

http://www.bbc.co.uk/news/science-environment-19584301

by petenixey • 14 years ago

138 17 14 years ago

bbc.co.uk

raldi• 14 years ago

I'd really like to see a labelled version of one of these images.

anonymouz• 14 years ago

These pictures are simply amazing. It's mind-boggling how far science and the necessary technology has progressed that we're able to do such a thing.

superxor• 14 years ago

Fc*king paywalls. This is such an amazing article, if only they could not have paywalls for research articles. Its as if the licenses will make enough money to fund the research, stupidity I say.

montecarl• 14 years ago

http://www.filedropper.com/science-2012-gross-1326-9

pixie_• 14 years ago

you are a king among men.

delinka• 14 years ago

I'm genuinely impressed by this research and would have probably become a physicist myself if images like this were available when I was in high school. But I have a nit to pick...

"hexagonal bonds of carbon atoms"

No. Maybe I'm just having an issue with the terminology, but those hexagonal shapes are not the "bonds" like the ones we'd draw for a molecular shape in chemistry class. That's just where the orbiting electrons squeeze between the nuclei. You get these bright lines because electrons' orbital paths are concentrated in these areas.

Evbn• 14 years ago

Isn't all solid matter surface form just the high probability areas of the electron clouds?

lisper• 14 years ago

Yep, pretty much.

dean• 14 years ago

Amazing pictures. But not really sure what I'm looking at here. Are those red spheres meant to be the nuclei of atoms? Are the bright hexagonal lines meant to be the path of electrons? If so, isn't the nucleus much too large in relation to the size of the whole atom? Isn't the proportion of the size of the nucleus to the whole atom akin to the size of a fly in a cathedral?

wgd• 14 years ago

They say the pictures were taken with a variant of Atomic Force Microscopy, so what you're seeing is most likely a false-colored representation (that is, they just chose some gradient of colors to use instead of grayscale) of the strength of the electrostatic forces acting on the probe tip at each location. So the whole thing is essentially just an image of the electron clouds.

icegreentea• 14 years ago

I believe the red areas are more or less "empty" space. The edges are bonds and the nodes would be the nucleus.

ars• 14 years ago

It's the size of the electrical field of the nucleus, which is about the size of an atom (well, as much as you can define a size for such a thing).

The size you are thinking of is the size of the strong force of the nucleus - a lot smaller.

Atomic particles don't actually have a size - at all. They are entirely empty space. The only "size" you can define for them is the size of the forces that act on them, but then you have to say which force you are talking about.

Electromagnetic force, strong force, weak force, gravity and quark force (gluons), are your choices.

Note that some forces have a distinct "edge", others just peter out - so there is no real good way of defining the size. Gravity is especially interesting, because measured by that force objects are huge. But of course gravity has no edge, so how do you define size?

Probably the best definition for forces without distinct edges is where does the signal from the force get lost among the noise from other objects? (For example, the other atoms in a molecule.) That's what you see here - each atom is visible until the next atom near it is closer.

anamax• 14 years ago

Some IBM group produced images of single and double bonds "pre-internet", or very early internet at the latest.

I remember thinking how the double bonds looked like the plastic plug-together model that I had for chemistry class.

clarebear• 14 years ago

Does anyone know if the tip carbon monoxide was oxygen toward the probed surface or carbon? I wonder if using the same atom to probe as be probed is part of the resolution enhancement.

dschleef• 14 years ago

The tip atom would be oxygen, as CO adsorbs to metal surfaces via carbon-metal bonding.

m-i• 14 years ago

Incredible stuff. If this would have been when I was in school maybe I would have chosen a diffrent career.

DiabloD3• 14 years ago

Why did they choose colors that make it look like a Metriod? Seriously, I can't unsee no matter how hard I try.

Atomic bond types discernible in images

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