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Updated: Nov 27, 2025
Engineering Adherent Bacteria by Creating a Single Synthetic Curli Operon
Published on: November 16, 2012
Highly efficient adhesion and inactivation of Escherichia coli on visible-light-driven amino-functionalized BiOBr
Dan Wu1, Tsz Ho Tsang2, Ho Yin Yip2
1Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China; School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region.
Abstract:
Amino groups are successfully introduced on the surface of BiOBr nanosheets through a facile ammonia functionalization method. The surface morphology of the modified BiOBr hybrids varies on the concentration of applied ammonia solution. The active {001}-facet-exposed feature of nanosheets is well retained after amino-functionalization. With generation of small Bi2O4 nanoparticles on the surface of BiOBr nanosheets, the light adsorption of hybrids gradually shifts to the near infrared range. Compared to pure BiOBr with negligible activity, BOB10 hybrids exhibit superior photocatalytic activity for bacterial inactivation, with 7-log cells reduction in 40 min under LED irradiation. Amino functionalization endows BOB10 hybrids excellent adhesion capability towards surface negatively-charged bacterium Escherichia coli, which can significantly shortened access distance of the predominant •O2- and h+ guaranteeing their inactivation ability on cells membrane, thus leading to remarkable bacterial inactivation performance.
