A ghost? This is a speck of dust sitting on a metal surface, seen close to the
edge of a piece of tape - the tape is the weird lumpy surface looming over the
whole scene. The ghostly figure (it looks to me a bit like a panda) may be
Another eerie example of nanoscale terrain echoing macroscale terrain - the
cliff in this image is only about 1/200 the thickness of a typical human hair.
It’s been weathered away not by wind and rain, but by a blast of high-energy
plasma. The thick black mountainous layer is
The broken edge of a piece of semiconductor laser material, viewed at 2,402x
under an electron microscope. At this magnification, it’s clear that the edge
isn’t cleanly broken at all, but has all sorts of furrows and ripples, all
invisible to the naked eye, making it look
Even when working in the cleanroom, a little dust is hard to avoid. This is a
gallery of electron microscope pictures of dust specks I’ve encountered while
making nanoscale devices in the UCSD Nano3 cleanrooms.
Dust is made of a variety of materials - dead skin cells, tiny bits
I found an area of strange mesa-like structures on one of my samples - near this
spot, the sample broke, scattering tiny fragments of glass and laser material
across that part of the sample’s surface. After I used high-energy plasma to
etch most of the laser material away, the
Nanosouffle? This piece of dust appears to have partially deflated. I’m not
sure if it really did crumple, or if it’s just a trick of the angle. The
light-colored platform it’s sitting on is all semiconductor laser material, that
the dust protected from the high-energy plasma that
More strange naturalistic formations in a sample where the plasma etching went
really, really wrong. This was supposed to be flat, empty, and perfectly
smooth. Actually, it still looks that way under anything but an electron
microscope… an ant could step on this and not even notice. It’s plenty,
A speck of dust sits on a pedestal - this is a smallish piece of dust, only
about 1/100 the thickness of an average human hair. The dust made its own
pedestal by protecting a small area from the high-energy plasma that I was using
to etch away the
Nanoscale forces work in non-intuitive ways sometimes. This wall of
semiconductor was plasma-etched so thin that the middle was etched entirely
away, leaving the wall’s top floating eerily above void. It’s thin and lacy,
and only touches the wall’s bottom in a few delicate places, yet it
String! I definitely wasn’t expecting to see this - it startled me when I first
came across it, partly because it was looping up dramatically into midair before
it sagged, as I watched, under the glare of the microscope’s electron beam. It
came to rest draped over one