Magnetocatalytic Graphene Quantum Dots Janus Micromotors for Bacterial Endotoxin Detection.
Beatriz Jurado SánchezMarta PachecoJaime RojoAlberto EscarpaPublished in: Angewandte Chemie (International ed. in English) (2017)
Magnetocatalytic hybrid Janus micromotors encapsulating phenylboronic acid (PABA) modified graphene quantum dots (GQDs) are described herein as ultrafast sensors for the detection of deadly bacteria endotoxins. A bottom-up approach was adopted to synthesize an oil-in-water emulsion containing the GQDs along with a high loading of platinum and iron oxide nanoparticles on one side of the Janus micromotor body. The two different "active regions" enable highly efficient propulsion in the presence of hydrogen peroxide or magnetic actuation without the addition of a chemical fuel. Fluorescence quenching was observed upon the interaction of GQDs with the target endotoxin (LPS), whereby the PABA tags acted as highly specific recognition receptors of the LPS core polysaccharide region. Such adaptive hybrid operation and highly specific detection hold considerable promise for diverse clinical, agrofood, and biological applications and integration in future lab-on-chip technology.
Keyphrases
- hydrogen peroxide
- quantum dots
- highly efficient
- energy transfer
- loop mediated isothermal amplification
- real time pcr
- inflammatory response
- label free
- iron oxide nanoparticles
- sensitive detection
- room temperature
- machine learning
- current status
- carbon nanotubes
- fatty acid
- high resolution
- molecularly imprinted
- deep learning
- circulating tumor cells