@chengeaa

PhD in Materials Science and Engineering (@UTAustin). Computational chemist. Stats nerd (now with an MS!). @UCBerkeley alum.

 SF
chengeaa.github.io/
Joined December 2014
  • Tweets85
  • Following243
  • Followers54
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Something I meant to share for a while but didn't get around to: new paper in @JChemPhys (one of my favorite journals)! We identify and analyze key mechanisms of bombardment-induced surface chemistry, a key part of nonequilbrium chemistry during PE #ALEtch doi.org/10.1063/5.0155929

Low-energy argon ion bombardment-induced decomposition of physisorbed hydrofluorocarbons on silicon...

Using a combination of tight binding molecular dynamics and ab initio molecular dynamics simulations, we study the mechanisms of bombardment-induced decompositi

pubs.aip.org
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i came back to twitter just to retweet this
Cal Football
@CalFootball9 Nov 2025
FOR THE VICTORY! 📺 calbea.rs/4qOlT5Z #SmartAndTough #GoBears
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simbu winning in a photo finish has got me wanting to run through a brick wall in my long run tonight
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wow i can't wait to find my ground state electron density from 5-10 pm on september 4th
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every week i say cal football has a real chance to do something this season every week i'm proven wrong in a new exciting way
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it should not have come down to this -- but when every play matters, this kind of nonsense is just unreasonable
RedditCFB
@RedditCFB6 Oct 2024
The obvious targeting is determined to be not targeting, because ACC officials have ruled that Miami is undefeated.
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an auspicious sign that cal could do something similar
Pat McAfee
@PatMcAfeeShow5 Oct 2024
“Well.. GameDay went to Berkeley… why can’t Vandy beat number 1?” ~ @tom_hart ANYTHING IS POSSIBLE IN COLLEGE FOOTBALL
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this is aging so well, if i do say so myself
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Don't question the math‼️
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10/10 deep cut and my favorite sign so far on @CollegeGameDay
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cal football is somehow reaching relevancy this is so exciting
Cal Football
@CalFootball29 Sep 2024
They’re coming to our city for the first-time ever 👀🌁 College Gameday is Berkeley bound! 🐻 #GoBears | #ALLIN
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Erik Cheng retweeted
RedditCFB
@RedditCFB22 Sep 2024
RIP Cal Twitter 8/31/24 - 9/20/24
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SEC! SEC! SEC!
Cal Football
@CalFootball7 Sep 2024
It just means more. #GoBears | #ALLIN
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absolutely ridiculous feat from the woman who also gave us some of the best finish line quotes (after winning that one too, youtube.com/shorts/SUJJ-mgZ8…)

Every runner has felt like Sifan Hassan at least once...🤣 #shorts #running #marathon

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

youtube.com
FloTrack
@FloTrack11 Aug 2024
SIFAN HASSAN IS ONE OF ONE 🇳🇱 After taking bronze in the 5,000m and 10,000m on the track, Sifan Hassan comes out and wins GOLD in the women's marathon in 2:22:55 -- a new Olympic record. She showed off her track speed and sprinted past world record holder Tigst Assefa 🇪🇹 in the final homestretch. Easily one of the greatest feats in distance running of all-time. Assefa takes silver in 2:22:58 and Boston Marathon champion Hellen Obiri 🇰🇪 grabs bronze in 2:23:10. #Paris2024 📸: Getty
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Erik Cheng retweeted
USATF
@usatf6 Aug 2024
COLE HOCKER IS AN OLYMPIC GOLD MEDALIST 🥇🇺🇸🤯
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Never even liked tennis anyway.
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Final paper from my PhD is now online: doi.org/10.1063/5.0180299 in which we propose and demonstrate the use of high throughput density functional tight binding simulations as a useful tool for studying ion bombardment of semiconductor surfaces :)

A density functional tight-binding based strategy for modeling ion bombardment and its application...

In many modern applications, it is important to understand mechanisms of non-equilibrium chemistry and physics that are driven by low energy ion bombardment of

pubs.aip.org
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New(ish) paper in @JPhysChem! We study how silicon nitride changes w/ argon bombardment with adsorbed hydrofluorocarbons, relating chemical change to physical defects, and noting that modification continues even after adsorbate decomposition and reaction. doi.org/10.1021/acs.jpcc.3c0…

Silicon Nitride Surface Modification by Ion Bombardment with Physisorbed Hydrofluorocarbons:...

Abstract. We present key pathways involved in bombardment-induced modification of amorphous silicon nitride (SiN) surfaces with physisorbed hydrofluorocarb

pubs.acs.org
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as of today, the last paper from my phd has been submitted!!
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