Anne Feng Xie

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We report the results of in situ AFM measurements examining the phase transition of bilayers formed from the zwitterionic phospholipid, DMPC, 1,2-dimyristoyl-sn-glycero-3-phosphocholine, supported on mica. The images show that the fluid to gel phase transition process features substantial tearing of the bilayer due to the density change between the two(More)
We investigate local electrostatics within a polyelectrolyte multilayer formed from layerby-layer self-assembly of QPVP/PSS (quaternized poly(vinylpyridine)/poly(styrenesulfonate)), through the strategy of embedding, within this multilayer, a weak polyacid, PMA (poly(methacrylic acid)). The methods mainly involved infrared measurements of these multilayer(More)
The goal of controlling molecular organization and orientation of organic films on a nanoscopic level has seen profound development using techniques based on the layer-by-layer deposition of polyelectrolytes.1-5 Applications have burgeoned. Building on the original focus upon polyelectrolytes whose charge density is fixed, the use of weak polyelectrolytes(More)
Advances in the design of special cryobiomedical apparatus and a review of the trend of developments in the field of cryosurgery in China are discussed. The typical structure of two special cryoprobes for treatment deep in the body and the technology of designing these probes are presented in detail. Some cases which are treated successfully with the above(More)
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