PETL mixer

The Wiesner lab at Cornell (whom you may remember as the discoverer of the neutrally charged but highly fluorescent “C-dots” Jess used for her charged-based separation work) are about to publish Asymmetric Organic-Inorganic Hybrid Membrane Formation via Block Copolymer-Nanoparticle Co-Assembly in Nano letters. Building upon their previous work on block copolymer self-assembling films, they have added titanium dioxide nanoparticles…

Today I looked at 3 more wafers: w158 (9/7/07) – some pinholes, overwhelming amount of very fine debris, not cbs as far as I can tellw160 (9/7/07) – some pinholes, debris, no cbsw171 (9/26/07) – many pinholes, lots of debris, no cbs w158 (200x) – small particles Link to updated report.

Membrane pore spacing can modulate endothelial cell- substrate and cell-cell interactions (REVISION) We submitted our “focal adhesions” paper to ACS Biomaterials Science and Engineering late last year. We received reasonable reviewer requests from three reviewers. I think I am mostly finished with revising the figures. Here are the updated figures and my comments on what changed….

In evaluating the usefulness of our membranes for cell culture, it is important to understand if and how cell growth is affected by the surface.  The desire is that they be consistent with standard culture substrates (i.e. Tissue Culture Plastic (TC)). I performed two growth trials using HUVECs (Human Umbilical Vein Endothelial Cells), one focusing…

Aminosilane has been used widely to derivatize the surface of silica for the applications in analytical chemistry, biochemistry, and biomedicine. It also plays an important role in providing adhesion for Nafion coating on silica surface. The basic principle is described as follows. After oxidizing the surface of silicon, the next step involves the derivatization of…

Hi all, the technique of UV Ozone bonding (of PDMS to glass, Si or pnc-Si) is now complete, serendipitously. Hsin from Miller lab want to bond PDMS to glass, they tried plasma oxidation treatment and it worked.  The method is as followed: plasma oxidation treatment for 35 sec (which did not bond the sample, when…