Jim’s Talk at Spring Brain Conference in Sedona, AZ

Frustration with the lack of agreement with experimental device has led me to check if the diffusion in the wells within the model is physically relavent.  To do so I’ve solved a partial differential equation pertaining to a concentration of 1 on the left half of the system and a concentration of 0 on the…

We have a high school student, Nikita, (from my Summer Nanotech class) who is volunteering in the lab.  Jim and I have assigned him the project of exploring diffusion of very small molecules through porous and putatively nonporous membranes.  Currently, we are focusing on hydrogen peroxide (H2O2 = 34Da) and detecting it with the Amplex…

Wafer 403 was processed last week using the new thermal oxide/TEOS steps outlined in the previous posts. I took images from six positions at different radial positions on different axis. All six samples looked relatively uniform! (1,0) – 35kx (0,-2) – 35kx (3,0) – 35kx (4,0) – 35kx (0,5) – 35kx We know that the…

As per Jim’s suggestion, I coated wafers 335 and 341 with 40.6nm SiO2 on top and 42nm SiO2 at backside. The membrane cells have been passed to Anant and Maryna for chemical stability and air flow tests. Today I got some TEM images from the medical center with the help from Karen.We first imaged wafer341…

Hello everyone! The new FEI Osiris TEM system has been finally setup recently. With the new purchased Gatan single tilt heating holder 628, we were managed to do an in-situ heating experiment with the Osiris system last week. We used the same sample OSO201510, which was used in Harvard, to test this heating holder as…

The pressure distribution during EO is a little counter-intuitive. Assuming no back pressure, and neglecting the effects of the meniscus on either end of an EO channel, the pressure distribution relative to the (left-to-right) direction of flow must look something like … The counter-intuitive part is that the pressure drop across the membrane opposes the…