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dc.contributor.authorHuang, Guochengen_US
dc.contributor.authorNg, Tsz Waien_US
dc.contributor.authorAn, Taichengen_US
dc.contributor.authorLi, Guiyingen_US
dc.contributor.authorWang, Boen_US
dc.contributor.authorWu, Danen_US
dc.contributor.authorYip, Ho Yinen_US
dc.contributor.authorZhao, Huijunen_US
dc.contributor.authorWong, Po Keungen_US
dc.description.abstractThe interaction between microorganisms and nanoparticles is a crucial step towards understanding the subsequent biological effect. In this study, the interaction between TiO2 nanoparticles and bacterial cell membrane was investigated by Two-dimensional Correlation Fourier Transformation Infrared spectroscopy (2D-FTIR-COS) using bacterial ghosts (BGs), which are non-living bacterial cell envelopes devoid of cytoplasm. The synchronous map of 2D-FTIR-COS results indicated that the functionalities in proteins of BGs preferentially interacted with TiO2 nanoparticles; whereas the interaction of TiO2 nanoparticles with characteristic functionality in polysaccharides (COH) and phospholipids (PO) were very weak or insensitive. This conclusion was further corroborated by settling of TiO2 nanoparticles in the presence of pure protein, polysaccharide and phospholipid represented by bovine serum albumin (BSA), alginate and phosphatidylethanolamine (PE). Additionally, the asynchronous map of 2D-FTIR-COS indicated a sequential order of functionalities bonded to TiO2 nanoparticles with the order of: COO− > aromatic CC stretching > NH, amide II > CO, ketone. These findings contribute to deeper understanding of the interaction between TiO2 nanoparticles and bacterial cell membrane in aquatic systems.en_US
dc.relation.ispartofjournalWater Researchen_US
dc.subject.fieldofresearchEnvironmental Sciences not elsewhere classifieden_US
dc.titleInteraction between bacterial cell membranes and nano-TiO2 revealed by two-dimensional FTIR correlation spectroscopy using bacterial ghost as a model cell envelopeen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.hasfulltextNo Full Text

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