Uniformity!

The overarching goal of this collaboration is to expose students and faculty at primarily-undegraduate institutions to the technology & expertise available at the University of Rochester.  We would like to make this kind of experience a recurring theme at URNano, and we expect to lay the foundations of such a program during the Summer of…

To test the filtration capabilities of our tents, Tucker and I immersed a tented (wafer 1150, ~30 nm pores) oxide structure (~3 um hole diameter, 200 nm high) and a nontented structure in a solution containing 60 nm (.043 nM) and 10 nm (~10 uM) Au nanoparticles for 1 hour (2 uL incubation volume), rinsed them…

EDIT – 2/10/14 – Adding 1 mM phosphate buffer fixes the problems outlined in this post. I’ve been having some trouble taking consistent pH measurements with the new pH probe. Prior to Thanksgiving I made a spectrum of 10 mM KCl buffers (at 4, 6, 7, 8, and 10 pH units) for use in my…

In this post I take a look at the flux of molecules through the 1-D membrane simulations.  I will then use this flux to compare to systems lacking a membrane. First off, how to find the flux.  Inside the membrane, the Flux = -Dm dc/dx.  Unfortunately this is extremely hard to calculate because of the…

Last week’s production yielded two wafers (502 & 504) with defect-free membranes. 506 had a high pinhole density. These wafers have a TEOS mask and were annealed twice; the first anneals did not produce pores so they were annealed again at 1000 C. From these results, it seems that the first anneal “seeds” pore formation…

Dave deposited a series of wafers last week at different temperatures. SC 166 -SC 173 were deposited between RT and 300C. These wafers had Jess’ E.O mask pattern ( circular sepcon) with single , 3,6 and 9 squares. The wafers were mostly pinhole free.In order to determine if deposition temperature affected the nature/ strength of…