WoS İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12573/394
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Conference Object Thin Films of Inert Metal Nanowires for Display Applications(Tanger Ltd, 2015) Citir, Murat; Sen, Unal; Usta, Hakan; Canlier, Ali; Hakan, Usta; Ali, Canlier; Murat, Citir; Unal, SenAg nanowire transparent electrode has excellent transmittance (90%) and sheet resistance (20 Ohm/sq), yet there are slight drawbacks such as optical haze and chemical instability against aerial oxidation. Chemical stability of Ag nanowires needs to be improved in order for it to be suitable for electrode applications. Coating Ag nanowires with a thin layer of inert metals such as Au and Pd through galvanic exchange reactions may enhance the chemical stability of Ag nanowire films highly and also helps to obtain lower haze. In this study, coating of thin Au and Pd layers has been applied successfully onto the surface of Ag nanowires. Usually coatings are carried out by salts such as HAuCl4 and K2PdCl4 in order to make nanotubes. In this study, novel ethylenediamine(en) complexes of inert metal cations with mild oxidation power were prepared in order to oxidize Ag atoms partially on the surface through galvanic displacement. The mild galvanic exchange allowed for a thin layer (1-4 nm) of inert metal coating on the Ag nanowires with minimal truncation of the nanowire, where the average lengths and the diameters were between 10 similar to 14 mu m and 55 similar to 65 nm, respectively. The crystalline structure of the shell was formed epitaxially on the surface. The new Ag nanowires were suspended in methanol and then electrostatically sprayed on glass and flexible substrates. It was revealed that average total transmittance remain around 90% within visible spectrum region (400-800 nm) whereas sheet resistance rises up to 175 Ohm/sq. Very thin layer of inert metal costs low, though this may render an excellent catalyst for applications such as fuel cell and organic synthesis, whereas transparent films of inert metal-coated Ag nanowire can be utilized as working electrodes for spectro-electrochemical cells as well.Conference Object Polymeric Semiconductors Based on Meso-Substituted BODIPY for (Opto)electronic Applications(Amer Chemical Soc, 2019) Usta, Hakan; Kim, Choongik; Kim, BumjoonConference Object Photophysical Properties of Self-Assembled Supramolecular Peptide Nanofiber Organic Semiconductors(Amer Chemical Soc, 2015) Khalily, Mohammad Aref; Usta, Hakan; Guler, Mustafa O.Conference Object Organic Semiconductor Based Surface-Enhanced Raman Spectroscopy Platforms(Amer Chemical Soc, 2018) Demirel, Gokhan; Usta, Hakan; Facchetti, AntonioConference Object Novel Photothermal-Based Release Mechanism for Controlled Release on Au Nanoparticles Through Light(Amer Chemical Soc, 2015) Goren, Ekrem; Cavusoglu, Halit; Yavuz, Emine; Usta, Hakan; Yavuz, Mustafa SelmanConference Object Nanostructured Superhydrophobic Organic Semiconductor Films Enable Sub-Zeptomole Level Molecular Sensing in Surface-Enhanced Raman Spectroscopy(Amer Chemical Soc, 2017) Demirel, Gokhan; Usta, Hakan; Facchetti, AntonioConference Object Citation - WoS: 1Citation - Scopus: 2Interface Engineering in Organic Thin Film Transistors(Institute of Electrical and Electronics Engineers Inc., 2017-10) Liguori, R.; Fusco, Sandra; Rubino, Alfredo; Usta, Hakan; Facchetti, A. F.A novel semiconductor, the small molecule C6-NTTN, was used to fabricate organic thin film transistors (OTFTs). Different architectures and deposition techniques were employed, together with various surface treatments of the substrate, insulator and metal contacts, whose effect is analyzed through atomic force microscopy. The aim is to investigate the relationship between the process parameters and the electrical performance, with a particular attention to the quality of interfaces between active layers. The proportionality between the charge carrier mobility and the interface trap density was studied. © 2018 Elsevier B.V., All rights reserved.Conference Object Design and Development of Functional Organic Small Molecules and Polymers for Optoelectronics(Amer Chemical Soc, 2016) Usta, Hakan; Demirel, Gokhan; Facchetti, Antonio; Muccini, MicheleConference Object Novel Method Based on Photothermal Cleavage of Thermolabile Molecules on Au Nanoparticles for Controlled Release(Amer Chemical Soc, 2016) Goren, Ekrem; Cavusoglu, Halit; Yavuz, Emine; Usta, Hakan; Citir, Murat; Yavuz, Mustafa Selman