TY - JOUR A1 - Vittur, Varadee A1 - Kolhatkar, Arati G. A1 - Shah, Shreya A1 - Rusakova, Irene A1 - Litvinov, Dmitri A1 - Lee, T. Randall T1 - Near-infrared-responsive, superparamagnetic Au@Co nanochains JF - Beilstein Journal of Nanotechnology PY - 2017/// VL - 8 SP - 1680 EP - 1687 SN - 2190-4286 DO - 10.3762/bjnano.8.168 PB - Beilstein-Institut JA - Beilstein J. Nanotechnol. UR - https://doi.org/10.3762/bjnano.8.168 KW - Au@Co KW - magneto-optical KW - nanochains KW - near-IR-active KW - superparamagnetic N2 - This manuscript describes a new type of nanomaterial, namely superparamagnetic Au@Co nanochains with optical extinctions in the near infrared (NIR). The Au@Co nanochains were synthesized via a one-pot galvanic replacement route involving a redox-transmetalation process in aqueous medium, where Au salt was reduced to form Au shells on Co seed templates, affording hollow Au@Co nanochains. The Au shells serve not only as a protective coating for the Co nanochain cores, but also to give rise to the optical properties of these unique nanostructures. Importantly, these bifunctional, magneto-optical Au@Co nanochains combine the advantages of nanophotonics (extinction at ca. 900 nm) and nanomagnetism (superparamagnetism) and provide a potentially useful new nanoarchitecture for biomedical or catalytic applications that can benefit from both activation by light and manipulation using an external magnetic field. ER -