Nano Research

Article Title

Bacteriophage M13 as a scaffold for preparing conductive polymeric composite fibers


Bacteriophage M13, nanofi ber, conductive polymer, self-assembly, bioconjugation


Using biological templates to build one-dimensional functional materials holds great promise in developing nanosized electrical devices, sensors, catalysts, and energy storage units. In this communication, we report a versatile assembly process for the preparation of water-soluble conductive polyaniline (PANi)/M13 composite nanowires by employing the bacteriophage M13 as a template. The surface lysine residues of M13 can be derivatized with carboxylic groups to improve its binding ability to the aniline; the resulting modifi ed M13 is denoted as m-M13. Highly negatively-charged poly(sulfonated styrene) was used both as a dopant acid and a stabilizing agent to enhance the stability of the composite fi bers in aqueous solution. A transparent solution of the conductive PANi/m-M13 composite fi bers can be readily obtained without any further purifi cation step. The fi bers can be easily fabricated into thin conductive fi lms due to their high aspect ratio and good solubility in aqueous solution. This synthesis discloses a unique and versatile way of using bionanorods to produce composite fi brillar materials with narrow dispersity, high aspect ratio, and high processibility, which may have many potential applications in electronics, optics, sensing, and biomedical engineering.

Graphical Abstract


Tsinghua University Press