Under the Microscope Profile picture
Jun 22, 2021 12 tweets 7 min read Read on X
Ok lets take a look through the @StructuralChem1 lab! Development of new technologies begins with synthesis of new materials. This synthesis is carried out in many of the fumehoods that we have available ImageImageImage
For synthesis of many ceramic materials we share a number of high temperature furnaces with other groups. Including tube furnaces for synthesis under various inert or reactive gases. ImageImageImage
Additionally, a lot of synthetic work takes place inside our gloveboxes which are filled with Argon. Many chemicals we use for battery research (like Li metal) are air or moisture sensitive and so well maintained gloveboxes are a must! ImageImage
Another two Ar boxes, one for sodium work and the PUB box (aka, Polymers Used in Batteries). These are also the boxes where we build our batteries before we test them. Speaking of testing batteries.. ImageImage
We have 100's of channels for connecting batteries. Most commonly we cycle pouch cells (shown in my schematic earlier and in the photo) but also coin (or button) cells and swagelok cells. ImageImage
We also have high precision battery cycling equipment as well as ovens for testing batteries at elevated temperatures. ImageImage
You may have noticed the radioactive box in the previous image :). This is where Fe-57 sources are kept after use in our Mössbauer spectrometer. This one was constructed in house many years ago. It could almost go into a museum if it wasn't so useful for us to this day. Image
Speaking of instruments, we have access to multiple characterisation methods for understanding the materials we make. Here we have our (old) XPS instrument, used for characterising surfaces and a TGA-MS for studying thermal behaviour. ImageImage
Last but not least we have our diffractometers, including my personal favourite the Stoe diffractometer (shown with the green light) where I do all my diffraction experiments on batteries. ImageImage
One thing that I always enjoy about visiting other labs are the personal touches that PhD students or postdocs add to the lab. Especially when they are in charge of running the gloveboxes :) ImageImageImage
And finally, the most important piece of equipment of all. The coffee machine. Here we modified this one to show short clips from Futurama while your coffee is being made 🙃 Image
So thats a brief run down of the main lab facilities! There is much more equipment that we have access to which is not directly a part of the Structural Chemistry group but we have access to (SEM, TEM etc)

• • •

Missing some Tweet in this thread? You can try to force a refresh
 

Keep Current with Under the Microscope

Under the Microscope Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @RealSci_Nano

Aug 15, 2023
Today we’ll refresh our knowledge of some of the battery terms. Let’s start from the beginning: we call a battery a device that converts chemical into electric energy using redox reactions. To narrow it down, let’s focus on batteries which use Li (Li-ion batteries).
image:iStock Image
It is a secondary (rechargeable) battery which uses reversible reactions with Li-ion to store energy.
fig: https://t.co/P4WUqJLAp4ul.org
Image
Redox (oxidation-reduction) reactions involve transfer of electrons between two substances. As a result of gaining or losing electron, oxidation state of the substances changes.
Read 13 tweets
Nov 6, 2022
I still don't know what kind of job I want to do after I finish my PhD.

But at least I found the answer to what kind of job I do not want:

I don't want a bullshit job!

(and they are way more common than we want to admit, even among "blue-collar" jobs.

en.wikipedia.org/wiki/Bullshit_…
BS job="a form of paid employment that is so completely pointless, unnecessary, or pernicious that even the employee cannot justify its existence even though, as part of the conditions of employment, the employee feels obliged to pretend that this is not the case."
I promised that I would talk about career opportunities after the PhD and other @AltAcChats using a university-organized event that I attended this week.

Well, I was recommended not to, sorry!

However, this book (50% read atm) is helping me clarify that.
Read 5 tweets
Nov 6, 2022
Imagine that you design the perfect cake. Due to the combination of different layers of ingredients, it will have awesome unrealistic properties. A #meta cake!

But: will the structure withstand the temperatures needed during baking?

Thread on my paper 👇
onlinelibrary.wiley.com/doi/10.1002/ad… https://www.epicurious.com/expert-advice/how-to-fix-a-broken
Instead of a cake, we designed a near-perfect absorber.

Less than 0.1% of the light hitting it can escape it!

How is that possible? By disorder!

Turns out that having the layers of ingredients intermix a bit makes an even better cake!

1st lesson: it's not always worth it to find a fabrication technique that avoids intermixing.

Those techniques are way slower and don't necessarily improve their properties.

A step towards scalable, large-area #metamaterials.

Read 14 tweets
Nov 6, 2022
If you have been folowing the account his week, you might have guessed that I have a thing for definitions and debates over definitions.

What is a metal?



What is a metamaterial?



And now: what is a cake?

That is the discussion that delayed our lab's (@LNM_eth) baking competitions.

Do cakes need to be sweet?

Are all cakes flour based?

Are all cakes layered?

Are all cakes round?

(and much more)
Maybe the reason for this discussion is that we discussed it in Switzerland, a country known for its polyglotism:

Turns out that @Wikipedia defines it differently in different languages!

In French, for example, salty cakes pass the filter:

fr.wikipedia.org/wiki/G%C3%A2te…
Read 6 tweets
Nov 4, 2022
On Wednesday I tried to define a #metamaterial.

Now it's time to define #metals, which should be way easier, right?

Spoiler: even in a #metallurgy group @LNM_eth, not everyone agrees!

First a list of "high-school science" definitions that don't really help us. The

"Metals are reflective": Yes but not all reflective things are metals. Not definition friendly. Image
"Metals are ductile and malleable, easy to work with": Not necessarily. Good luck working with Tungsten, which is definitely metal.

This article tells a bit about how hard making the Tungsten filaments that we used on lights was!

americanscientist.org/article/tungst…
Read 16 tweets
Oct 6, 2022
Finally, the thread (you didn't know) you have been waiting for 🥳 "How can we use X-ray scattering to learn about the way the atoms sit in a #small #nanoparticle?" - lets use the Pair Distribution Function #PDF ! It's all about the neighbors 1/6 /@RPittkowski
To get information from small #nanoparticles, where periodic lattice planes are rare, we measure the X-ray scattering to very large scattering angles. This is called #Xray #totalscattering. So we need to come veeeery close with the detector to our sample.😱😬 2/6
Again, we integrate our scattering image (check up older tweets), but we are not done yet. More data treatment is necessary. We use a #Fouriertransform and transform from reciprocal (Q) space to #real #space - and there we have it, our PDF 😍3/6
Read 6 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us!

:(