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Self-Propelled Soft Protein Microtubes with a Pt Nanoparticle Interior Surface.
- Source :
-
Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2017 Apr 11; Vol. 23 (21), pp. 5044-5050. Date of Electronic Publication: 2017 Feb 06. - Publication Year :
- 2017
-
Abstract
- Human serum albumin (HSA) microtubes with an interior surface composed of Pt nanoparticles (PtNPs) are self-propelled in aqueous H <subscript>2</subscript> O <subscript>2</subscript> medium. They can capture cyanine dye and Escherichia coli (E. coli) efficiently. Microtubes were prepared by wet templating synthesis by using a track-etched polycarbonate (PC) membrane with alternate filtrations of aqueous HSA, poly-l-arginine (PLA), and citrate-PtNPs. Subsequent dissolution of the PC template yielded uniform hollow cylinders made of (PLA/HSA) <subscript>8</subscript> PLA/PtNP stacking layers (1.16±0.02 μm outer diameter, ca. 23 μm length). In aqueous H <subscript>2</subscript> O <subscript>2</subscript> media, the soft protein microtubes are self-propelled by jetting O <subscript>2</subscript> bubbles from the open-end terminus. The effects of H <subscript>2</subscript> O <subscript>2</subscript> and surfactant concentrations on the velocity were investigated. The swimming microtube captured cyanine dye in the HSA component of the wall. Addition of an intermediate γ-Fe <subscript>3</subscript> O <subscript>4</subscript> layer allowed manipulation of the direction of movement of the tubule by using a magnetic field. Because the exterior surface is positively charged, the bubble-propelled microtubes adsorbed E. coli with high efficiency. The removal ratio of E. coli by a single treatment reached 99 %.<br /> (© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Details
- Language :
- English
- ISSN :
- 1521-3765
- Volume :
- 23
- Issue :
- 21
- Database :
- MEDLINE
- Journal :
- Chemistry (Weinheim an der Bergstrasse, Germany)
- Publication Type :
- Academic Journal
- Accession number :
- 27957810
- Full Text :
- https://doi.org/10.1002/chem.201605055