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From: ILPI Support <info**At_Symbol_Here**ILPI.COM>
Subject: Re: [DCHAS-L] water reactivity of transition metal sulfides
Date: Tue, 1 Dec 2020 18:31:27 -0500
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: 5351E906-989F-425F-919D-34E23600805A**At_Symbol_Here**ilpi.com
In-Reply-To <014dbc8393844061b6730fa0433c3773**At_Symbol_Here**oc11expo11.exchange.mit.edu>


Shop local, Dan!  Check in with the Bawendi group in the MIT Chemistry Department (Course V for the Techies among us).  They do extensive work with quantum dots based on transition metal sulfides. https://nanocluster.mit.edu 

Going completely off-topic, quantum dots are cool things. As you reduce a particle to the nanometer size range, the optical and electronic properties scale with the particle size. It's a result of the unusually large surface to volume ratio - think about all the "dangling bonds" that are uncompleted on the surface when your particles is a few to tens of atoms in diameter. Here's a hefty dose of "today I learned-" if you have too much time on your hands:

https://www.nanowerk.com/what_are_quantum_dots.php

https://www.explainthatstuff.com/quantum-dots.html 

https://www.youtube.com/watch?v=LlPDyl53rZA 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5445848/ (massive overkill)

Rob Toreki

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On Dec 1, 2020, at 5:45 PM, Daniel C Herrick <herrickd**At_Symbol_Here**MIT.EDU> wrote:

Greetings DCHAS-L hive mind,

I am trying to determine the degree of water reactivity of transition metal sulfides (most specifically zirconium sulfide - CAS 12039-15-5).  I know this can depend on many factors including contact time with moisture, particle size, contaminants, etc.  If you have worked with or evaluated the safety properties of these materials please let me know your thoughts.

Thanks,

Dan

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Daniel C. Herrick, CIH
Senior EHS Coordinator
Department of Mechanical Engineering (MechE)
Massachusetts Institute of Technology (MIT)
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