Nanostructured Surfaces
Directed Assembly of Colloid Nanocrystals by Unique Uses of Electrospun Nanofibers and Their Electronic, Optoelectronic, Plasmonic Applications 
Kiremitler N.B.1, Onses M.S.1
1 Department of Material Science and Engineering, Nanotechnologhy Research Center (ERNAM) Erciyes University, Kayseri, 38039, Turkey
E-mail: nuriburak@erciyes.edu.tr
In this work we present novel approaches that based on using electrospun nanofibers as unusual way that can be use as template and nanopatterning tool for colloid nanocrystals. These approaches can be classified by three complementary method: additive, subtractive and direct templating.
In the subtractive approach, as we named as “Electrospinnanolitography (ESPNL)”[1], nanofibers are used as mask to underlying substrate that are functionalized as thin films with target of interest during subsequent plasma etching process. That enables fabrication of well defined patterns (nanoribbons) sub 50 nm resolution. This patterns are using to directed self assembly of colloid nanocrystals to use in plasmonic applications. We showed nanofiber mask can be also fabricated on controlled locations by an advance technique known as “near field electrospinning (NFES)” 
     In the additive approach spatially defined nanofibers that are fabricated by NFES are used as inkpots. NF inkpots include functional inks based on end functional polymers which are able to graft on surface via thermal process. Ungrafted portions of inkpots are removed by subsequent washing that leads nanoscale patterns of grafted polymers to use for directed assembly various type of metal, metal oxide and semiconductor nanocrystal to use in optoelectronic, plasmonic and electrode applications.
    Our latter approach, functional polymer nanofibers, are generated by conventional electrospinning, are directly used for selective assembly of metal particles. That metal particles act as seed to growth metal complex on it by seed mediating direct growing techniques. It leads fabrication of conductive nanofibers for use in transparent electrode applications.
ACKNOWLEDGMENTS: This work was supported by the Research Fund of the Erciyes University (Project Number: FBA -2018-8366)

1.	Kiremitler N.B., Pekdemir S., Patarrayo J., Karabel S., Törün İ., Puntes V.F., Onses M.S. Assembly of Plasmonic Nanoparticles on Nanopatterns of Polymer Brushes Fabricated by Electrospin Nanolithography // ACS Mac. Lett.-2017.-6.-P. 603-608.