Browsing by Author "Dana, A."

All-aluminum hierarchical plasmonic surfaces in the infrared

Ayas S.; Bakan, G.; Dana, A. (The Optical Society, 2016)

All-Aluminum metal-insulator-metal resonator structures withmultiple metal-insulator stacks showing resonances in the mid-infrared(MIR) are fabricated. Ultrathin native Al2O3 is used as the insulator layersenabling simple ...

All-chalcogenide glass omnidirectional photonic band gap variable infrared filters

Kondakci, H. E.; Yaman, M.; Koylu, O.; Dana, A.; Bayındır, Mehmet (AIP Publishing, 2009)

We report on the design, fabrication, and characterization of spatially variable infrared photonic band gap filter that consists of thermally evaporated, high refractive indexcontrast, amorphous chalcogenide glass multilayers. ...

Atomic force microscopy for the investigation of molecular and cellular behavior

Ozkan A.D.; Topal, A. E.; Dana, A.; Güler, Mustafa O.; Tekinay, A. B. (Elsevier, 2016-10)

The present review details the methods used for the measurement of cells and their exudates using atomic force microscopy (AFM) and outlines the general conclusions drawn by the mechanical characterization of biological ...

Colorimetric detection of ultrathin dielectrics on strong interference coatings

Ayas S.; Bakan, G.; Ozgur E.; Celebi, K.; Torunoglu, G.; Dana, A. (OSA - The Optical Society, 2018)

Metal films covered with ultrathin lossy dielectrics can exhibit strong interference effects manifested as the broad absorption of the incident light resulting in distinct surface colors. Despite their simple bilayer ...

Counting molecules with a mobile phone camera using plasmonic enhancement

Ayas S.; Cupallari, A.; Ekiz, O. O.; Kaya, Y.; Dana, A. (American Chemical Society, 2014)

Plasmonic field enhancement enables the acquisition of Raman spectra at a single molecule level. Here we investigate the detection of surface enhanced Raman signal using the unmodified image sensor of a smart phone, ...

The design and fabrication of supramolecular semiconductor nanowires formed by benzothienobenzothiophene (BTBT)-conjugated peptides

Khalily, M. A.; Usta, H.; Ozdemir, M.; Bakan, G.; Dikecoglu, F. B.; Edwards-Gayle, C.; Hutchinson, J. A.; Hamley, I. W.; Dana, A.; Güler, Mustafa O. (Royal Society of Chemistry, 2018)

π-Conjugated small molecules based on a [1]benzothieno[3,2-b]benzothiophene (BTBT) unit are of great research interest in the development of solution-processable semiconducting materials owing to their excellent charge-transport ...

Excited-state dynamics and nonlinear optical response of Ge nanocystals embedded in silica matrix

Razzani, L.; Gnoli, A.; Righini, M.; Dana, A.; Aydınlı, Atilla (A I P Publishing LLC, 2006-05-01)

We use a dedicated Z-scan setup, arranged to account for cumulative effects, to study the nonlinear optical response of Ge nanocrystals embedded in silica matrix. Samples are prepared with plasma-enchanced chemical-vapor ...

Exploiting native Al2O3 for multispectral aluminum plasmonics

Ayas S.; Topal, A. E.; Cupallari, A.; Güner, H.; Bakan, G.; Dana, A. (American Chemical Society, 2014)

Aluminum, despite its abundance and low cost, is usually avoided for plasmonic applications due to losses in visible/infrared regimes and its interband absorption at 800 nm. Yet, it is compatible with silicon CMOS processes, ...

Extracting the temperature distribution on a phase-change memory cell during crystallization

Bakan, G.; Gerislioglu, B.; Dirisaglik, F.; Jurado, Z.; Sullivan, L.; Dana, A.; Lam, C.; Gokirmak A.; Silva, H. (American Institute of Physics Inc., 2016-10)

Phase-change memory (PCM) devices are enabled by amorphization- and crystallization-induced changes in the devices' electrical resistances. Amorphization is achieved by melting and quenching the active volume using short ...

Fabrication of supramolecular n/p-nanowires via coassembly of oppositely charged peptide-chromophore systems in aqueous media

Khalily, M. A.; Bakan, G.; Kucukoz, B.; Topal, A. E.; Karatay, A.; Yaglioglu, H. G.; Dana, A.; Güler, Mustafa O. (American Chemical Society, 2017-07)

Fabrication of supramolecular electroactive materials at the nanoscale with well-defined size, shape, composition, and organization in aqueous medium is a current challenge. Herein we report construction of supramolecular ...

Force and time-dependent self-assembly, disruption and recovery of supramolecular peptide amphiphile nanofibers

Dikecoglu, F. B.; Topal, A. E.; Ozkan A.D.; Tekin, E. D.; Tekinay, A. B.; Güler, Mustafa O.; Dana, A. (Institute of Physics Publishing, 2018)

Biological feedback mechanisms exert precise control over the initiation and termination of molecular self-assembly in response to environmental stimuli, while minimizing the formation and propagation of defects through ...

Formation of Ge nanocrystals and SiGe in PECVD grown SiNx: Ge thin films

Dana, A.; Tokay, S.; Aydınlı, Atilla (Elsevier, 2006)

Formation of Ge nanocrystals in SiNx matrices has been studied using plasma enhanced chemical vapor deposition in both as deposited samples as well as in post-vacuum annealed samples. Low temperature and short duration ...

Growth of Ge nanoparticles on SiO2 / Si interfaces during annealing of plasma enhanced chemical vapor deposited thin films

Foss, S.; Finstad, T. G.; Dana, A.; Aydınlı, Atilla (Elsevier B.V., 2007)

Multilayer germanosilicate (Ge:SiO2) films have been grown by plasma enhanced chemical vapor deposition. Each Ge:SiO2 layer is separated by a pure SiO2 layer. The samples were heat treated at 900 °C for 15 and 45 min. ...