8/8
This study provides a roadmap for tuning 3D-printed electrochemical sensors through thoughtful pretreatment and material selection.

7/8
Not all conductive filaments or pretreatments are equal.

Surface chemistry, carbon structure, and resistivity together define 3D-printed electrode performance. A one-size-fits-all approach doesn’t work.

6/8
NaOH activation and Au NP deposition each altered surface roughness and capacitance differently for each material.
• BlackMagic 3D showed the strongest roughness and capacitance gains.
• ProtoPasta was least affected.
• Amolen showed microelectrode-like behavior after NaOH activation!

5/8
• Filaments act as partially blocked electrodes, where insulating regions limit electron transfer.
• Outer-sphere reactions were consistent across treatments and the voltammetry is limited mainly by uncompensated resistance.
• Inner-sphere responses varied dramatically with pretreatment.

4/8
Using TGA, SEM, and Raman microscopy, we characterized surface structure and morphology, then benchmarked electrochemical behavior. We looked at the background processes (capacitance and solvent windows) and the Faradaic processes with outer- and inner-sphere redox mediators.

3/8
We compared three popular commercial conductive PLA filaments: Amolen (carbon black), ProtoPasta (carbon black), and BlackMagic 3D (graphene).

Each underwent three pretreatments: Alumina polishing, NaOH electrochemical activation, and Au nanoparticle electrodeposition.

2/8
3D-printed electrochemical sensors are rapidly transforming how we design and deploy analytical devices because they're low-cost, customizable, and made anywhere.

But… conductive filaments behave differently depending on the electrode surface treatment (and there are a lot of options).

We have a new paper out that was a real labor of love to publish. It took absolutely ages.

We started the work by asking: do different conductive 3D printing filaments respond to pretreatments in the same way?

#Electrochemistry #3DPrinting

pubs.acs.org/doi/10.1021/...

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Thanks to @rescorp.org for the support! Excited to work with Jim and Long

I've seen folks talk about how "in four years" they'll be able to get back to their planned projects and I really don't think that's going to work out. People & projects losing funding now will not be able to hit pause and come back once funding is restored. Hard-won progress & capacity will be lost

Treat it like a manuscript? #chemsky_v02

Congrats, Julie!

We're trying to get a better understanding of how 3D printed electrodes work.

We performed a comparative study of how several different filaments and pre-treatments impact the physical and electrochemical properties of these materials.

I'm happy it's out there!

The point of peer-review is the deep thinking after you have read & annotated the paper where you synthesise your thoughts into a coherent argument, combining them with all of your experience, to try to improve the article. This is where I often learn the most, and where the most value emerges.

And still is the worldview for many/most of us

Should have looked through my timeline first...

Does anyone know if/how active NSF grants will be impacted by the spending freeze?