**5. Acknowledgment**

308 Recent Advances in Nanofabrication Techniques and Applications

in the first case while they are broad and red shifted in the second case. This finding demonstrates that the trap states on the NCs surfaces formed with laser lithography, and

Fig. 18. (a) Confocal microscopy fluorescence image of the C12-PMMA film after irradiation at 266 nm with 80 incident pulses and fluence F=20 mJ·cm-2. (b) Emission spectra of selected areas of the image; each curve corresponds to the marked area of (a) with the same colour and number. (c) Emission spectra of selected areas of the C12-PMMA film after irradiation at

In this work are demonstrated two different lithography techniques based on the use of pulsed UV laser light for the creation of well defined polymeric nanocomposite structures. The presented techniques open up new ways for nanocomposite film patterning with well dispersed and occasionally size controlled NCs. The first technique is the UV laser photopolymerization lithography, where UV laser pulses are used for the polymerization and patterning of nanocomposite solutions of preformed colloidal NPs mixed with monomers and photoinitiators. In the second lithography technique UV laser pulses induce the in situ formation of NPs in specific locations in the polymer matrices, starting from polymeric film incorporating light-sensitive precursors of NPs. Using both techniques we present patterned structures of various nanocomposite systems, such as PMMA with TiO2 NPs, PMMA and SU-8 with Fe2O3 NPs aligned into NWs under external magnetic field, CTO with Au NPs, TOPAS and PMMA with size tuned CdS NPs. The formed nanocomposite structures can exhibit controlled and enhanced surface, optical, electronically conducting and magnetic properties, in an easy and fast way, promising for

266 nm with 80 incident pulses and higher fluence F=50 mJ·cm-2.

**4. Conclusion** 

thus, the optical quality of the NCs strongly depends on the surrounding matrix.

The authors would like to thank Dr Rafaella Buonsanti, Dr Gianvito Caputo, Dr P. D Cozzoli, Dr Anna Maria Laera, Professor Leander Tapfer who provided us with diverse colloidal nanofillers or nanocomposite samples and for the fruitful discussions and suggestion that helped in the realization of this research work.
