Conductive AFM patterning on oligo(ethylene glycol)-terminated alkyl monolayers on silicon substrates: Proposed mechanism and fabrication of avidin patterns
作者： Guoting Qin , Jianhua Gu , Kai Liu , Zhongdang Xiao , Chi Ming Yam
DOI: 10.1021/LA1047358
关键词:
摘要: Micro- and nanopatterns of biomolecules on inert, ultrathin platforms nonoxidized silicon are ideal interfaces between silicon-based microelectronics biological systems. We report here the local oxidation nanolithography with conductive atomic force microscopy (cAFM) highly protein-resistant, oligo(ethylene glycol) (OEG)-terminated alkyl monolayers substrates. propose a mechanism for this process, suggesting that it is possible to oxidize only top ethylene glycol units generate carboxylic acid aldehyde groups film surface. show avidin molecules can be attached selectively oxidized pattern density varied by altering bias voltage during cAFM patterning. Biotinylated nanoparticles immobilized resultant patterns. Since one most established methods immobilization based avidin–biotin binding wide variety biotinylated availa...
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