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Gelatin-Coated Magnetic Nanowires for High-Sensitivity Optical Labels
M Charbel Cuevas-Corona1, J Mauricio Lopez-Romero1, Alejandro Manzano-Ramírez1
1Center for Research and Advanced Studies of the National Polytechnic Institute, Cinvestav Querétaro, Querétaro 76230, Mexico.
Nanomaterials (Basel, Switzerland)
|January 8, 2023
Summary
Gelatin-coated magnetic nickel nanowires (NiNWs) offer a highly sensitive optical detection method. This technique achieves superior detectability for biosensing applications compared to existing methods.
Area of Science:
- Materials Science
- Nanotechnology
- Biosensing
Background:
- Magnetic nickel nanowires (NiNWs) show potential for biosensor transducers due to their detectability via light scattering.
- Functionalization of NiNWs is crucial for specific molecular binding in sensor applications.
Purpose of the Study:
- To develop a method for coating NiNWs with gelatin for enhanced functionalization and detection.
- To evaluate the detectability of gelatin-coated NiNWs and compare it with other analytical techniques.
Main Methods:
- Encapsulation of magnetic nickel nanowires with gelatin.
- Decoration of gelatin-coated NiNWs with silver nanoparticles (AgNPs).
- Detection using light-scattering methods.
Main Results:
- A method for coating NiNWs with gelatin was successfully developed.
- Gelatin-coated NiNWs decorated with AgNPs demonstrated excellent detectability down to 140 pg/mL.
- This detection level significantly outperforms ICP-OES and magnetoresistance sensing.
Conclusions:
- Gelatin encapsulation provides a versatile platform for functionalizing magnetic nanowires.
- The developed method offers a highly sensitive and cost-effective approach for optical label detection in biosensing.
