For in vivo studies, and even possible human studies, have you given any thought for how you will do PK/BD on these? I'm having trouble imagining how you'll be able to detect these non-optically, unless you had some made of heavy isotopes for ICP/MS.

Continuing with the human studies thought, are these particles seeing RES uptake? I assume, based on the high QY, that these the emission centers for these particles are protected by a thick shell and/or corona. General handwaving from the FDA was that they were as concerned with particles persisting as with elemental toxicity. Is there a predicted degradation pathway for these particles?

Can these particles be made with a hydrodynamic radius, including corona, <8nm? Is it possible to dope them to get better NIR emission?

Unrelated to technical stuff: I thought that a YC thing was that you had to move to San Diego for a few months. That doesn't seem all that conducive to wet lab work, in fact, it seems like a non-starter. Is that still a requirement for the bio-related startups? If so, how how disruptive is it?

Thanks for the answers!