Gold‐Cobalt Nanoparticle Alloys Exhibiting Tunable Compositions, Near‐Infrared Emission, and High  T  2  Relaxivity | Zendy

Marbella Lauren E. | Zendy; Andolina Christopher M. | Zendy; Smith Ashley M. | Zendy; Hartmann Michael J. | Zendy; Dewar Andrew C. | Zendy; Johnston Kathryn A. | Zendy; Daly Owen H. | Zendy; Millstone Jill E. | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Premium

Gold‐Cobalt Nanoparticle Alloys Exhibiting Tunable Compositions, Near‐Infrared Emission, and High T 2 Relaxivity

Author(s) -

Marbella Lauren E.,

Andolina Christopher M.,

Smith Ashley M.,

Hartmann Michael J.,

Dewar Andrew C.,

Johnston Kathryn A.,

Daly Owen H.,

Millstone Jill E.

Publication year - 2014

Publication title -

advanced functional materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 6.069

H-Index - 322

eISSN - 1616-3028

pISSN - 1616-301X

DOI - 10.1002/adfm.201400988

Subject(s) - materials science , cobalt , nanoparticle , analytical chemistry (journal) , spectroscopy , photoluminescence , transmission electron microscopy , x ray photoelectron spectroscopy , particle (ecology) , particle size , mass spectrometry , nuclear magnetic resonance , nanotechnology , chemistry , optoelectronics , organic chemistry , oceanography , quantum mechanics , geology , chromatography , physics , metallurgy

We demonstrate the synthesis of discrete, composition‐tunable gold‐cobalt nanoparticle alloys (% Co = 0–100%; diameter = 2–3 nm), in contrast with bulk behavior, which shows immiscibility of Au and Co at room temperature across all composition space. These particles are characterized by transmission electron microscopy and 1 H NMR techniques, as well as inductively coupled plasma mass spectrometry, X‐ray photoelectron spectroscopy, and photoluminescence spectroscopy. In particular, 1 H NMR methods allow the simultaneous evaluation of composition‐tunable magnetic properties as well as molecular characterization of the colloid, including ligand environment and hydrodynamic diameter. These experiments also demonstrate a route to optimize bimodal imaging modalities, where we identify Au x Co y NP compositions that exhibit both bright NIR emission (2884 m −1 cm −1 ) as well as some of the highest per‐particle T 2 relaxivities (12200 m m NP −1 s −1 ) reported to date for this particle size range.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research