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Self-Propelled Soft Protein Microtubes with a Pt Nanoparticle Interior Surface.
- Source :
- Chemistry - A European Journal; 4/11/2017, Vol. 23 Issue 21, p5044-5050, 7p
- 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 %. [ABSTRACT FROM AUTHOR]
- Subjects :
- PLATINUM nanoparticles
SURFACE chemistry
SERUM albumin
HYDROGEN peroxide
CYANINES
Subjects
Details
- Language :
- English
- ISSN :
- 09476539
- Volume :
- 23
- Issue :
- 21
- Database :
- Complementary Index
- Journal :
- Chemistry - A European Journal
- Publication Type :
- Academic Journal
- Accession number :
- 122451522
- Full Text :
- https://doi.org/10.1002/chem.201605055