[labnetwork] HSQ Alternatives

[Michael Rooks]

Medusa has adhesion problems- that's old news. Do we have a faq file about
that?

HSQ storage and use tips can be found on this page.
<https://nano.yale.edu/hsq-essential-tips>
https://nano.yale.edu/hsq-essential-tips

I just ordered another liter of fox16, with a three-month lead time. No
problem- we'll just freeze it. This is convenient and easy.

--------------------------------
Michael Rooks
nano.yale.edu


On Thu, May 6, 2021 at 7:45 PM Mark K Mondol <mondol at mit.edu> wrote:

> Long:
>
>
> Mike Rooks will probably also chime in with better information than I
> have, but LN2 freezing has worked really well for me and is reasonably
> convenient for me as I already have LN2 dewars in my lab for other reasons.
> I bought a big dewar that holds racks of cryo tubes (Chart MVE
> CryoSystem4000Cryogenic about $3,800 with wheels) that makes it easy to
> store. The hold time when about 1/3 filled so that the HSQ is not actually
> immersed in liquid is >6weeks, probably much more.
>
>
> One way of reducing cost is to order the 6% HSQ and dilute it with Dow
> MIBK which is very expensive but has worked well for me ( $420/500ml -
>
> DC MIBK RINSE SOLVENT 500 ML) which should be available from your HSQ
> distributor.
>
>
> Regards,
>
>
> Mark K Mondol
>
> ----------------------------------------------------------------------------------
> Mark K Mondol
> Assistant Director NanoStructures Laboratory
> And
> Facility Manager Scanning Electron Beam Lithography Facility
> Bldg 36 Room 229
>  mondol at mit.edu
> office - 617-253-9617
> cell - 617-224-8756
> ------------------------------
> *From:* labnetwork <labnetwork-bounces at mtl.mit.edu> on behalf of Chang,
> Long <lvchang at Central.UH.EDU>
> *Sent:* Thursday, May 6, 2021 12:26 PM
> *To:* labnetwork at mtl.mit.edu
> *Subject:* [labnetwork] HSQ Alternatives
>
> Hi All,
>
> I’m looking for HSQ alternatives since it’s expensive, has a 14 week lead
> time and comes in 250mL bottle. We waste most of the bottle due to it’s 6
> months shelf life. Although we had some bottles still good after 2 years at
> 5C, it’s just a huge gamble after a year. We tried LN2 freezing, but it
> takes too much effort.
>
> I’ve attached a table of the cost per mL for the alternatives I found
> assuming you want 100nm thick. The AQM and EMResist are in powder form and
> advertise 1 year powder shelf life and 3 months mixture shelf life. They
> can distribute the powder into many small bottles.
>
> Particularly interesting is the Medusa 82 which has the lowest cost and
> advertises better shelf life. Does anyone have experience with these HSQ
> alternatives?
>
>
> Thanks,
> Long
>
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