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Andrew S. Rosen

@andrewrosen

Assistant Professor at Princeton. Quantum-chemical engineer and materials designer. https://rosen.cbe.princeton.edu

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04.08.2023
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Latest posts by Andrew S. Rosen @andrewrosen

For some reason, I actually forgot this existed!

24.01.2026 02:23 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

My laptop's backspace key no longer works. Perfection from here on out, folks!

23.01.2026 23:32 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Searching "vibrational frequency" on Google image search does not get what you might think...

03.01.2026 02:13 πŸ‘ 9 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

I'd probably do the same! Love it.

24.12.2025 05:50 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Every time I pass the Bayway Refinery when traveling from NJ to NY I always give it a big chemical engineering salute. 🫑

24.12.2025 00:25 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Thank you! I am thankfully on the mend now, but I give influenza A a big "F". As one of my students put it, this experience means I am "now officially part of the Princeton community." 🫠

Hope you stay well!

21.12.2025 23:39 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

There is a pivotal time in one's life where you get the flu and think "ah, yes, it is clear now how people die from this, and I am surprised I'm not dead myself."

21.12.2025 18:31 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I have learned about the "Princeton Plague" from my wonderful students. But I really did not need the first-hand experience.

19.12.2025 16:26 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

πŸ˜‚ Sadly, the doctor's orders are not permanent...

18.12.2025 00:44 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I had a minor medical procedure earlier today requiring anesthesia, and my doctor made me promise not to grade any final exams this afternoon. Fair enough. πŸ˜‚ Not sure if it would help or hurt them. Probably they'd all get 100s.

17.12.2025 20:42 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

They have to leave *something* for future work!

01.12.2025 03:54 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Alright, I'm intrigued.

01.12.2025 03:44 πŸ‘ 10 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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This is my YouTube-recommended shorts. It has everything I could want to watch. Birds, Bo Burnham, some random tomb of cheetos, and... @aronwalsh.github.io. πŸ”₯

01.12.2025 00:31 πŸ‘ 6 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Whenever I see the framing of "YYY made a deal", I usually think it's a good investment or partnership…

29.11.2025 14:21 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

I'm trapped in a car with my parents singing Chappell Roan and saying something about "6-7."

Please spare me.

22.11.2025 18:55 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Ah, you can't beat the classics! πŸ˜‚

17.11.2025 04:26 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Screenshot of a Tweet pointing out that academic spam is actually in its own way kind of encouraging.

Screenshot of a Tweet pointing out that academic spam is actually in its own way kind of encouraging.

I think about this post every day πŸ§ͺ

07.11.2025 12:15 πŸ‘ 637 πŸ” 111 πŸ’¬ 3 πŸ“Œ 1
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Moon Duchin on the β€˜Mathematical Quagmire’ of Gerrymandering

Moon Duchin is the coolest!!

www.nytimes.com/2025/11/03/s...

06.11.2025 03:00 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Capturing the Complexities of Catalyst–Support Interactions with the Help of Machine Learning Maxson and SzilvΓ‘si use a machine-learned interatomic potential to model supported silver nanoparticles. They show that the idealized nanoparticle shapes commonly invoked in the computational catalys...

@andrewrosen.bsky.social highlights @tibor-szilvasi.bsky.social’s work using ML potentials to model supported Ag nanoparticles - revealing that idealized shapes don’t match experiments below 8 nm. Read the Highlight: onlinelibrary.wiley.com/doi/10.1002/... #AngewandteChemieNovit

03.11.2025 16:34 πŸ‘ 7 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

Good to know! Thanks for the update too!

02.11.2025 22:33 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I think part of it is the relative lack of people. But I also think that things go trending more on Twitter, which is both good and bad. The bad is obvious. But the good is that it created unifying experiences for academic Twitter to nucleate around to make it feel part of the same community.

02.11.2025 15:43 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I guess where I'm confused is that the M06-2X geometries will not be minima or TS with wB97M-V, which was used for model training. So, some small amount of strain could have a large impact on things. Maybe I'm thinking about this the wrong way?

02.11.2025 15:38 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

(I'm not implying the models will do well after this, to be clear)

02.11.2025 04:02 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Is this a fair comparison though if you are doing a static calculation on a structure from a different level of theory than what was used for the MLIP? I think it'd be more useful to either have the same level of theory or to do the MLIP optimizations here.

02.11.2025 03:59 πŸ‘ 2 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
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So, You Want To Test A Nuclear Weapon? - Funranium Labs I dedicate the following rant to my Lovely Assistant, who can probably recite this by heart now, and Meredith Yayanos who hit boggleface about halfway through an in person version and asked β€œPLEASE,Β W...

I have just been sending this to people. You know, from the last time he pulled this shit www.funraniumlabs.com/2017/03/want...

30.10.2025 02:52 πŸ‘ 151 πŸ” 60 πŸ’¬ 11 πŸ“Œ 7

πŸ˜… I feel this...

29.10.2025 11:57 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Me: Where are my keys?!

Me: Oh yeah! They're in the zeolite!

27.10.2025 16:24 πŸ‘ 14 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Professor Emeritus Axel D. Becke @dalhousieu.bsky.social has passed away at age 72.

26.10.2025 14:46 πŸ‘ 8 πŸ” 13 πŸ’¬ 0 πŸ“Œ 0

I agree it's a terrible idea, but just a note that this plugin is by a third party -- not Google Scholar.

26.10.2025 14:30 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

πŸ˜‚ That will do it! I like your approach.

(I'm not sure how I've gotten this far, I must admit!)

25.10.2025 16:57 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0