Crystal Growth inside Nanopores

We have an STTR grant funding us to revise the Sepcon plastic housing to enable us to do reverse centrifugation easier. As outlined in this previous post, we’re trying to remove unbound IgG from a solution of IgG-antibody conjugates using reverse centrifugation:  The earlier work used Josh Winan’s jury-rigged PDMS-filled reverse centrifugation setup, but despite the…

This is a follow-up to my last post about gold separations.  Using the Tecan, I’ve scanned the absorbance spectrum of all the gold particles we posses in water, 10 mM KCl, and 100 mM KCl.  Here are the results: The internal peaks are between 515 and 525 nm and are the same for both water…

I attended the 2014 Gordon Research Conference (GRC) on Fuel Cells in August. For those of you not familiar with Gordon conferences, I will make a plug for them as a great venue for learning much detail and interacting closely with many of the major contributors in a specific field. GRC has a wide variety…

In order to validate the salt diffusion test I just posted, I’ve been measuring H2O2 diffusion with SC348 and the Amplex Red Assay from Invitrogen.  I first showed that H2O2 (=34 Da) passed SC348 in this experiment.  Here, I just repeated with slightly different standard curves and positive (‘regular’ Sepcon, SC195 = 4% and 13.9nm)…

Wet Etching of Optical Thin Films   As a result of Christian’s trip and Kevin’s discussions with me, I have been wondering if we could make nanoporous MgF2 membranes for Raman spectroscopy. Part of the appeal in using our Si-based nanomembranes is that the volume they occupy in the observation space is extremely minimal. Even…

I’ve been thinking a lot about energy storage lately, and I think I’ve found a potential use for pnc-Si in Supercapacitors. What is a supercapacitor? As the name suggests, it’s a double-layer capacitor (EDLC) with very high capacitance values (1-500+ Farads) or a million times more than that of a typical dielectic capacitor. An electrolyte…