Scientists revolutionize microscopy by reimagining the logic of imaging
https://www.sciencedaily.com/releases/2024/08/240801142229.htm
New method significantly reduces the time and damaging radiation used to image fragile specimens
Date:
August 2, 2024
Source:
Trinity College Dublin
Summary:
Scientists have devised an innovative imaging method using state-of-the-art microscopes
that significantly reduces the time and radiation required.
Their work represents a significant breakthrough that will benefit several disciplines,
from materials science to medicine, as the method promises to deliver improved
imaging for sensitive materials such as biological tissues that are especially
vulnerable to damage.
And chips?
On 07/08/2024 08:29, Bill Sloman wrote:
On 7/08/2024 3:02 pm, Jan Panteltje wrote:A bigger problem for biological tissues is that they have to be dried
Scientists revolutionize microscopy by reimagining the logic of imaging
https://www.sciencedaily.com/releases/2024/08/240801142229.htm
New method significantly reduces the time and damaging radiation used
to image fragile specimens
Date:
August 2, 2024
Source:
Trinity College Dublin
Summary:
Scientists have devised an innovative imaging method using
state-of-the-art microscopes
that significantly reduces the time and radiation required.
Their work represents a significant breakthrough that will benefit
several disciplines,
from materials science to medicine, as the method promises to
deliver improved
imaging for sensitive materials such as biological tissues that are
especially
vulnerable to damage.
And chips?
The paper claims "Giving microscopists the ability to 'blank' or
'shutter' the electron beam on and off in a matter of nanoseconds in
response to real-time events has never been done before."
It isn't true. The stroboscopic electron microscopes that Cambridge
Instruments sold from about 1983 as electron beam testers could
deliver a half-nanosecond wide pulse of electrons.
The electron beam microfabrictors we'd been selling for year could
turn the beam on and off in less than 10nsec - I worked on the
beam-blankers for both.
Scanning transmission microscopes do use higher voltage electrons, but
that just means that the electrodes that blank the beam have to be
longer. With a half nanosecond wide pulse, you couldn't make the
plates too long for 2kV electrons because the transit time got longer
than the blanking period and I had to invent a solution to get around
that, but "a matter of nanoseconds" give you more wiggle-room.
before they can be put in a vacuum chamber and this process can distort them. They also usually need to be stained with a heavy element such
as uranium for TEM and coated with gold or other conductive materials
for SEM.
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