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A series of cationic gemini surfactants with dodecyl tails and with hydroxyl groups in the spacer has been prepared. The self-assembly was studied both in bulk and at solid surfaces. This series of surfactants, denoted 12-n(pOH)-12, with n=3 or 4 and p=1 or 2, was compared with conventional cationic gemini surfactants of 12-n-12 type, with n=2 or 4. The critical micelle concentration was determined...
The electronic structures of the self-assembled monolayers (SAMs) of n-alkanethiolate [CH3(CH2)nS, n=1-5] on Au(111) surface have been investigated using the state-of-the-art first-principles calculations. The adsorption energy, the tile angle, and the partial charge of n-alkanethiolate were presented. The charge transfer at the metal-molecule interface was calculated by the Mulliken population analysis...
The high molecular mass respiratory protein of the tarantula Eurypelma californicum, a 4×6-mer hemocyanin, was investigated by atomic force microscopy (AFM). Various substrates and methods were evaluated for immobilization of individual hemocyanin molecules on a solid surface. Samples were imaged after physisorption on mica and self-assembled monolayers, and after chemisorption on Au(111) and N-hydroxy-succinimide...
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