# IMHO?  I'm asking for your opinion on KEWLEST metamaterials and nanotech uses...

**URL:** <https://boards.straightdope.com/t/imho-im-asking-for-your-opinion-on-kewlest-metamaterials-and-nanotech-uses/692093>\
**Category:** In My Humble Opinion\
**Created:** [July 1, 2014, 2:31pm UTC](https://boards.straightdope.com/t/imho-im-asking-for-your-opinion-on-kewlest-metamaterials-and-nanotech-uses/692093 "2014-07-01T14:31:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Find\_Friends](https://avatars.discourse-cdn.com/v4/letter/f/c37758/32.png) [@Find\_Friends](https://boards.straightdope.com/u/Find_Friends)\
**Post date:** [July 1, 2014, 2:31pm UTC](https://boards.straightdope.com/t/imho-im-asking-for-your-opinion-on-kewlest-metamaterials-and-nanotech-uses/692093/1 "2014-07-01T14:31:08Z")

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… but I’ll present two of my own as well:

First, a mathematical analog!!!

You can use a certain form of metamaterial to send a wave representing a function and get the derivative coming out the other end!

[http://www.upenn.edu/pennnews/news/penn-research-helps-lay-out-theory-metamaterials-act-analog-computer](http://www.upenn.edu/pennnews/news/penn-research-helps-lay-out-theory-metamaterials-act-analog-computer)  
Second, you can have a book with pages that rip off for purifying water!!!

Okay, I’m having trouble finding online stuff about the special book with tiny silver particles that can treat sewage.

— Meantime, here is something related:

> **[Graphene Sheets Can Be Turned Into the Best Filters Ever, For Desalination...](https://www.popsci.com/technology/article/2012-07/things-you-can-make-graphene-drug-detectors-transistors-and-tasty-drinkable-seawater/)**
>
> Add another item to the list of things one can accomplish using graphene, the wonder material of the future: Clean drinking water. Graphene could cheaply and easily remove salt from seawater, potentially turning the oceans into a vast drinking supply...

_Oh boy Oh boy Oh boy!!!_

* * *

_ **- Trans Fat Og, the ONE True Blue Jack!** _

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<div class="post-metadata">

**Author:** ![Find\_Friends](https://avatars.discourse-cdn.com/v4/letter/f/c37758/32.png) [@Find\_Friends](https://boards.straightdope.com/u/Find_Friends)\
**Post date:** [July 1, 2014, 10:09pm UTC](https://boards.straightdope.com/t/imho-im-asking-for-your-opinion-on-kewlest-metamaterials-and-nanotech-uses/692093/2 "2014-07-01T22:09:06Z")

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Okay, I have come across two sites for the second application:

[http://www.new](http://www.new) scientist.c om/article/mg21829165.400-silver-nanoparticles-provide-clean-water-for-2-a-year.html#.U7MvZVczJFI

[http://www.health](http://www.health) line.c om/health-news/tech-gel-with-silver-nanoparticles-disinfects-water-082313

If you think anything approaches or exceeds these I’d like to know.

(Would this thread have fit better in a different forum?)

- TFO, aka TBJ