Biomedical subjects

Sufen Ai

Publications and source records attributed to Sufen Ai.

3 recordsLinked to original sources

PubMed2006

Fabrication of polyethyleneimine and poly(styrene-alt-maleic anhydride) nanotubes through covalent bond.

Nanotubes of Polyethyleneimine (PEI) and Poly(styrene-alt-maleic anhydride) (PSMA) based on the layer-by-layer (LbL) technique and template method through covalent bond have been fabricated. The combination of LbL assembly and the template method can well control the length, wall thickness, outside, and inner diameters of the resulting nanotubes. The formation of covalent between PEI and PSMA enables the nanotubes with a good mechanical stability. The uniform tubular structure has been characterized by scanning electron microscopy (SEM) and transmission Electron Microscopy (TEM). Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) measurements confirms the formation of covalent bond in the assembled nanotubes.

Binding Sites↗

PubMed2005

Layer-by-layer assembly of human serum albumin and phospholipid nanotubes based on a template.

The preparation of nanotubes from human serum albumin (HSA) and mixtures of L-alpha-dimyristoylphosphatidic acid (DMPA)/HSA is described. The nanotubes were prepared via alternate adsorption of HSA of different/opposite charges (by variation of the pH) or by sequential adsorption of DMPA and HSA, respectively, onto the inner surfaces of porous anodic alumina templates. This simple layer-by-layer assembly results in a monodisperse size distribution and a uniform orientation. The nanotubes allow the specific incorporation of lipophilic components such as channels or receptors and may thus serve as probes or sensors for biological systems.

Circular Dichroism↗

PubMed2003

Highly flexible polyelectrolyte nanotubes.

A pressure-filter-template approach was employed to prepare polyelectrolyte nanotubes through layer-by-layer deposition in the alumina template. With the thicker wall, the ordered polymer nanotubes possess a high flexibility. The results demonstrate that the electrostatic interactions of polyelectrolytes play a key role in fabricating water-soluble charged polymer nanotubes. The structure of the polyelectrolyte nanotube was confirmed by SEM, TEM, and UV, respectively.

Journal Article↗