Anyone in México?

[Mathieu H]

Hi.
I have been following DIYbio for a while now as I knew some day I would be ready to try and connect microfabrication to the "bio-world" and now I think it's time to start being active. I can offer DIY capabilities in instruments and microfabrication in general.

So, first step: is there anyone from Mexico already active or running DIYlabs?

[Nathan McCorkle]

Tell me more about your microfab processing and what feature scale you can achieve. I've been working on ways to do this myself, but only just recently got the time and money to try some things out finally.

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[Mathieu H]

Hi Nathan.

We have developed a laser platform for micron-scale etching using a CD-DVD pickup head and use it to generate ablation in several absorbing materials. I wrote a simple code to use it as a CNC system to etch desired patterns in greyscale (grey levels are achieved by playing with the number of laser passes).

For non-absorbing or transparent materials we are using a thin carbon coating that enables the same type of ablation. You can see more here (http://pubs.rsc.org/en/content/articlelanding/2013/lc/c3lc51041g)

The resolution of the features depends on several parameters such as the thickness of the layer, its absorbance at such wavelengths, the laser power density, pulse/dwell time, etc. But it is basically around a couple of microns. We are now working on getting higher aspect ratios and our blu-ray setup is nearly ready to give its first results.

I think the paper will help you understand better what is done. And the results we obtain in some plastics are amazing. Some nanoresidues are left in the channels and are fluorescent for instance.

Cheers

[Daniel Grajales]

Hi Mathieu,

I am mexican as well and I have been following DIYbio for some time waiting for the back to Mexico. I am currently doing my PhD in Barcelona, but as soon as I go back to Mexico (2017?) I want to start with a DIY bio lab. Where are you located?

Regards,

Daniel

[Mathieu H]

Hi Daniel.

I am at the School of Science, UNAM. We should definitely talk when you come back and let me know if there is anything I can do to help.

Best of luck in your PhD.

Saludos!

[Daniel Grajales]

Hi Mathieu,

I just finished reading your paper. Very interesting. I am actually looking for better ways to fabricated high quality PDMS microfluidic channels for our biosensor prototype and I liked your idea. So, you got up to ~25 micrometers resolution channels? 

I like the idea of increasing the evanescent field using those CNP over the surface, however the hydrophobicity increase is a drawback in my case. I will keep looking for similar approaches. Great work! Mexican science ;)

Regards,

Daniel

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Daniel Grajales

[Mathieu H]

Hi Daniel!

If you are interested in collaborating (anything that comes up) let me know.

Even if you want to visit us whenever you are around or want to spend some time here if your team allows it, we are open.

What kind of sensor are you working on?

We have a few projects that might interest you as well I believe.

I'll let you know how it goes in our evanescent field enhancement tests (although it will take some time, be patient please).

I'm glad we met.

[Joel de la Barrera]

Hello, we have a DIYbio Group in México. Right here in Guanajuato.

You can join us: https://www.facebook.com/groups/DIYbioMexico/