As part of my work over at the University of Nottingham, I’ve been using iBidi devices to grow cells. Eventually, I will use their product to do Raman studies of cells grown on my MgF2 substrates. I’ve been making some…
Author: Greg Madejski
Greg is a McGrath Lab alumnus (2010-2020) who incorporates nanomembranes into a variety of devices. Currently, he works on detecting microplastics as the CEO of Parverio inc.
Distributions of in-Situ formed Au Nanoparticles
Jirachai’s recent post on the formation of Au nanoparticles on the surface of the NPN is very exciting. For one, it is a very dense monolayer of particles. This self assembly mechanism is magnificent whereas if we tried to dry…
Posted in NRG
Cleaning MgF2 Nanomembranes after International Shipping
I had previously manufactured some freestanding MgF2 nanomembranes (50 nm MgF2, starting from Wafer Template 1174) for my work here in Nottingham. I shipped about 75 chips at the beginning of July in my 3d printed holders, however, they arrived with…
Notes from the 2015 ECM4 Conference, Aberdeen, Scotlandd
Notes from the ECM4 conference Met with Mathew Halls from Schrodinger. He was curious about what I did, came up, gave me his card. Apparently he knows Chin Tang. He’s giving a talk on the last day. Opening Remarks –…
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Nanomembranes+Microfluidic PETLs Integration
Our collaborator Fernando has made a really nifty way to make microfluidics work with lamination pouches. These flat pouches can be sealed together using a heat activated glue, which can be done consistently using a 15 for a 100-pack of 8.5″x12″…
Au Nanoparticles deposited on tented posts
Continuing my work from last week, Tucker used the same tenting (NPN, vapor transfer) and incubation procedure (20 nm and 60 nm Au particles) on an oxide substrate with posts (200 nm high). The substrate was dessicated in the 70C…
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MgF2 Cytocompatibility #4
Summary: I have some ok images (20x) of cells growing on MgF2. My controls still look poor. Something about the stain is causing the TCP + NPN controls to detach ahead of the MgF2 material, even if they aren’t fully dead…
Au Nanoparticles deposited on tented structures
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…
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Breathing delaminates nanomembrane tents
I have been having problems getting smoothed sheets of nanomembrane on my little oxide structures. I tried a number of different ways to delaminate the membrane, using tweezers to poke the membrane especially, but had little success getting smoothed sheets.…
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New Alt. Membrane Release Recipe (Nitride RIE)
I have lost many chips during my MgF2 or Au or Pt process due to yield problems with my RIE. I have wondered if the problem was due to power spikes. I have observed that my most poorly yielding etch…
