NRG

We got a bunch of extremely nice EO wafers through the pipeline, and I’ve been trying to do some experiments with them.  There’s very few pinholes on these wafers, and the pores are beautiful.  My experiments so far have been w/ SC 166. Pore image: Contributed area distribution: We need the following figures for our…

To supplement the work that Dave’s been doing with carbonization, I’m doing some chemical stability/discoloration tests.  The first step of these tests is to measure the contact angles.  The following are images of contact angle tests and quantitative data from ImageJ of the angles.  These are SC141 chips and they are not rinsed or treated…

After seeing a reduction of pore size at 750 C, I decided to run three different soak times at a fixed acetylene concentration of 1 LPM.  As expected, the longer soak time resulted in more occlusion. It seems that the carbon growth is almost linear: 5 min treatment shrinks the pores by 5 nm and…

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…

I set up separations with 100kD cutoff Microcon (cellulose) membranes and protein standards.  Here are the results: Due to shorter than normal gel, the myosin didn’t get resolved.  However we can see a separation that appears to be fairly sharp.  We have seen this in the past with cellulose.  The different salt concentrations don’t appear…

Tom gave me a few samples to scan on the AFM.  PVP was added to the well side of the samples.  I scanned the pnc-Si side of the chips to see if/how the PVP came through the pores.  Samples were from SC114. Two different areas of supported pnc-Si membrane on control (no PVP) chip: The…

Last week I ran a series of membranes through the carbonization process at four different temperatures (600, 700, 750 and 800 C) at a fixed acetylene concentration (1 LPM).  As expected, the growth of the carbon ring around our pores is temperature dependent.  Note: image processing was done on 100 kx micrographs with the exception…

Here are the sizes of the particle ladder by TEM.  I compare to the previous unmodified DLS results in this table. Manufacturer’s Size TEM size Stdev DLS Size 5 6.6 .6 8 10 7.8 .9 9.4 15 12.7 .9 13.2 20 16.0 1.5 17.2 30 25.7 2.1 28.8 40 34.3 2.3 30.7 The particles aren’t…

In an effort to understand the material property using burst pressure, a few key variables have to be analyzed to determine their effect on burst pressure. These variables are: 1) Shape : a) Maximum Dimension of the slot. b) Minimum Dimension of the slot. 2) Active Area. 3) Effective circumference. 4) Number of features on…