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The Unit of Naples is involved in design, manufacturing and characterization of multifunctional microsystems; a promising platform where different functionalities and materials are combined using the IC-compatible technology to generate innovations which serve in different markets. The activity tackles the challenge of a strong miniaturization required in many application fields, of complex systems towards the micrometre and even sub-micrometer range. Thanks to this strategy, electrical, optical, thermal and piroelectrical functionalities have been integrated on multi-materials (Silicon-based materials, glass, polymers) systems, allowing to develop microsystems for:

 

Managing fluid for biological and sensing applications

(G. Coppola, M. Iodice, S. Torino, S. Shomwick, G. Bianco):

 


Some examples of multifunctional systems
based on an IC-compatible technology

The systems allow the manipulation of fluids at the submillimetre length scale and could be applied to substantial reduce the sample volume; to reduce the cost of reagents; to allow a parallel multi-channels analysis; to manage and manipulate particles and cells with more control and predictability. These systems can be used to realize disposable devices and/or culture platform useful for different biological applications. 

 

 

Local administration of drugs and biological molecules in cells and organisms through microneedles arrays

(L. De Stefano, P. Dardano J. Politi, A. Caliò, D. Passaro):

 


(a) Microneedles (MNs) array flexibility; (b) micro-images of a single needle;
(c) macroscopic view of MNs; (d) tip measurement.

Hybrid devices based on a photolithographic approach for the fabrication of polymeric microneedles are realized. Different shapes (conical, lancet, truncated pyramids) with heights from 200 to 1400 nm can be obtained by changing mask aligner optical power and exposure times. Integration with hard materials (glass, silicon, porous silicon and so on) and microfluidic circuits for specific application is also exploited. 

 

 

Integration of multifuctionalities on optical fibers

(E. Esposito, A. Crescitelli, V. Di Meo, V. Tufano):

 


Conceptual Scheme and SEM Images of
Polarization Sensitive Device based on Optical Fiber

The addition of new features and functionalities on optical fibers involves the exploitation of those physical phenomena that are at the forefront of scientific optical research. In fact, the light-matter interaction on the fiber surface could be achieved through the integration of nanostructures supporting resonant modes, highly sensitive to local modifications of the surrounding environment such as molecular binding events. In addition to metallic structures supporting resonant mode, also metamaterials, rare earths (erbium) and 2D materials (graphene), could be integrated on the optical fiber tip. The creation of periodic distributions of subwavelength sized metal resonators could potentially open the way to novel devices exhibiting the exotic optical properties offered by metamaterials such as super lensing for advanced imaging probes.

 

 

 

Contact: Giuseppe Coppola

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