Writing Chemical Patterns Using Electrospun Fibers as Nanoscale Inkpots for Driected Assembly of Colloidal Nanocrystals

This study introduces novel, versatile capabilities in a large area, high speed fabrication of high-resolution nanoscale patterns of ultrathin polymer interfaces for universal assembly of colloidal nanocrystals. This unprecedented approach relies on the use of electrospun nanofibers as nanoscale reservoirs for writing chemical patterns that consist of covalently bound polymers. The synergistic combination of versatile electrospinning and robust end-grafted polymer interfaces enables patterning a broad range of nanoscale crystals including gold nanospheres, silver nanocubes, titanium dioxide nanoparticles, semiconductor nanocrystals and nanoplatelets. The ability to fabricate nanoscale patterns over large surface areas reveals engineering capabilities for applications that range from transparent electrodes to display technologies. In addition to their strong potential for technological impact, these same capabilities enable systematic studies of unusual behaviors in geometrically confined nanoscale crystals, distinct from those observed in unpatterned surfaces



General Information about Nanotechnology Research and Implementation Center

Erciyes University Nanotechnology Application and Research Center (ERNAM) was founded with the mission of providing state of art facilities and an interdisciplinary platform for researchers working in the field of nanotechnology in Erciyes University. The research activities performed in the center over the last five years have resulted in ~60 ERNAM addressed scientific publications in SCI indexed journals. ERNAM researches have publications in high impact and prestigious journals of the field, such as Nature Nanotechnology, Nano Letters, ACS Nano, RSC Nanoscale, Small, ACS Applied Materials & Interfaces etc.
The center has a strong focus on industrial applications of the nanotechnology and has 7 pending patent applications. There are more than 10 industrial partners that are involved in the projects conducted in ERNAM.

ERNAM houses Nanoscience & Nanotechnology interdisciplinary graduate program and a growing number of graduate and undergraduate students actively use the facilities for both research and educational purposes.

The research at ERNAM is highly interdisciplinary and researchers from engineering to pharmacy are actively involved in the projects. Below is a short summary of the research directions presently studied in the center.

Multifunctional superhydrophobic coatings: A range of different materials and approaches is explored to fabricate extremely liquid repellant and multi-functional surfaces for use in a great variety of applications that range from self-cleaning solar cells to anti-icing aircrafts.
Plasmonically active substrates: ERNAM researchers are pursuing fabrication of plasmonically active solid substrates for applications in sensing, catalysis, biotechnology, solar cells and optoelectronics devices. A particular focus involves surface-enhanced Raman scattering (SERS)- based detection of trace amounts of molecules down to single entities showing great promise for areas, including food safety, point-of-care diagnostics, and anti-counterfeiting.

Nanocatalysis: The researchers at ERNAM have strong expertise in the synthesis and characterization of hybrid nanomaterials for catalysis applications. The materials that are investigated for this research range from 2D materials to semiconductor nanoparticles.

Energy storage systems: The importance of rechargeable lithium ion batteries has significantly increased with the dominance of our lives with electronic devices. The research in ERNAM seeks for lithium ion batteries with high energy density, long life time and rapid charge-discharge rates. The current efforts focus on nanostructured materials for supercapacitor applications.

Nanofabrication: Patterning of structures with nanoscale dimensions on surfaces is key to fabricate nanoelectronic and nanooptic devices and to study structure property relationships. Researchers at ERNAM explore the use of high resolution printing techniques to pattern a broad range of nanomaterials in an additive manner.
Nanomedicine: ERNAM has strong interest in medicine applications of nanotechnology. The current efforts include nanostructured materials for drug delivery, materials and systems for focused ultrasound based therapeutic technologies and SERS based diagnostics.

The center sits on a total area of 2000 m2 which is composed of laboratories (1200 m2) and office spaces. ERNAM has 200 m2 area of class 1000 and class 10000 clean rooms. These clean rooms include several operational tools such as, mask aligner, metal evaporator, and inductively coupled plasma chemical vapor deposition system. The characterization laboratories include atomic force microscopy (AFM), scanning electron microscopy (SEM), Raman spectroscopy, zeta sizer, UV-Vis Spectrometer, quartz crystal microbalance, goniometer, ellipsometer and other characterization and processing tools.



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