From the past experiments we know that it is not easy to form pores in thicker silicon layer. It is mainly because that higher energy is required to form open holes in a thicker silicon film. Dave showed us less…
Category: NRG
Feasability of SU8 3010 Negative Resist for Lift-off.
SU-8 3010 (MicroChem) was chosen for its improved adhesion strength, and reduced stress. MicroChem also provides a datasheet on the usage of this negative resist that was followed as a baseline. For Post Exposure Bake (PEB) two methods were implemented,…
Posted in NRG
Making Slot Devices in URNano facility
The schematic of the slot device is shown below. The main support structure is the pnc-Si membrane with Au or Ag metal on both sides. There is a conformal covering of Alumina shown in blue in the figure which actually…
Posted in NRG
Filtrate Concentration of the Barcikowski Particles Remain Discouragingly Low Despite Larger Sepcons and Higher Salt Concentrations
Because the Barcikowski lab intends to use the nanoparticles they sent us, relatively high yields are necessary for any step that cleans them up. This is unfortunate, because in every single separation that we’ve done (with one exception mentioned further…
Posted in NRG
Thin Film Electrode Creation
I have been trying to fabricate my own Indium Tin Oxide (ITO) electrodes on coverslips for the BBB device in order to minimize the working distance for any microscopy. Currently, I am using microscope slides that are way too thick…
Posted in NRG
The effect of pump rate and channel height on Urea clearance (COMSOL modeling)
Comsol modeling was done to find the ideal channel height and volumetric flow rate. What is clear from the simulation is that ever increasing flow rates in the model lead to increased clearance and decreasing channel heights give some benefit…
The onset of pore formation in NSN and OSO stacks
A few weeks ago, I did some RTP annealing of NSN and OSO stacks. The purpose of this annealing experiment was hoping to capture the onset of pore formation and see whether there is any different behavior between NSN and…
Posted in NRG
Barcikowski Particles
The Barcikowski samples, sent from Germany a month ago, continue to be a fecund source of inconsistant data. Using the DLS to monitor several filtrations has resulted in a series of baffling results that I think I’ve finally begun to…
Posted in NRG
BBB Device V2.4
I have created a successfully sealed flow chamber with this current device (V2.4), with the caveat that I sealed off the top chamber and was unable to test leaking from the top to the bottom. Again, the dialysis chips from…
Posted in NRG
Electron Beam Evaporation, RIT vs UR
The CHA e-beam evaporator in RIT had been used traditionally for the deposition of metal on the pnc-Si membranes. The most important factor for metal deposition on the membranes is that the nanoholes must not be blocked. So the metal…
Posted in NRG
