Researcher:
Yalçın, Aybike Ural

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PhD Student

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Aybike Ural

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Yalçın

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Yalçın, Aybike Ural

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2014 - 20182

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    PublicationOpen Access
    Modification of the surface plasmon enhanced optical forces on metal nanorod pairs by axial rotation and by dielectric intralayer
    (Elsevier, 2014) Department of Physics; Yalçın, Aybike Ural; Güven, Kaan; Müstecaplıoğlu, Özgür Esat; Faculty Member; Faculty Member; Department of Physics; College of Sciences; N/A; 52290; 1674
    We investigate numerically the effect of axial rotation and the presence of a dielectric intralayer on the spectral behavior of the optical force on a gold nanorod pair. The frequency spectrum of the optical force is obtained through the Maxwell stress tensor formulation and the full vectorial solution of electromagnetic waves. The common and the relative forces, which are defined through the optical force acting on each nanorod, are computed for different axial rotations and for different permittivity and thickness of the dielectric intralayer. We found that both the misalignment and the dielectric intralayer can be utilized to tailor the magnitude and direction of the relative optical force, providing a tunable attractive or repulsive response between the nanorods. (C) 2014 Elsevier B.V. All rights reserved.
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    PublicationOpen Access
    Silk-based aqueous microcontact printing
    (American Chemical Society (ACS), 2018) Department of Electrical and Electronics Engineering; N/A; Department of Physics; Department of Molecular Biology and Genetics; Kumar, Baskaran Ganesh; Melikov, Rustamzhon; Aria, Mohammad Mohammadi; Yalçın, Aybike Ural; Begar, Efe; Sadeghi, Sadra; Güven, Kaan; Nizamoğlu, Sedat; PhD Student; PhD Student; Faculty Member; Faculty Member; Department of Electrical and Electronics Engineering; Department of Physics; Department of Molecular Biology and Genetics; College of Engineering; Graduate School of Sciences and Engineering; N/A; N/A; N/A; N/A; N/A; N/A; 52290; 130295
    Lithography, the transfer of patterns to a film or substrate, is the basis by which many modern technological devices and components are produced. However, established lithographic approaches generally use complex techniques, expensive equipment, and advanced materials. Here, we introduce a water-based microcontact printing method using silk that is simple, inexpensive, ecofriendly, and recyclable. Whereas the traditional microcontact printing technique facilitates only negative lithography, the synergetic interaction of the silk, water, and common chemicals in our technique enables both positive and negative patterning using a single stamp. Among diverse application possibilities, we exemplify a proof of concept of the method through optimizing its metal lift-off process and demonstrate the fabrication of electromagnetic metamaterial elements on both solid and flexible substrates. The results indicate that the method demonstrated herein is universally applicable to device production and technology development.