Institute of Materials Science and Nanotechnology
Nanoscale Devices and Imaging Group
Plasmonics
We are working on designing, fabricating, characterizing and applying plasmonic surfaces to sensing and imaging. Particularly, we have fabricated high sensitivity surface enhanced Raman spectroscopy (SERS) substrates for single molecule level sensing and imaging. We are also working on designing infrared plasmonic resonances that may find application in surface enhanced Infrared Absorption spectroscopy and bolometric detection. Also, we have recently demonstrated label-free superresolved imaging using wide area high performance SERS substrates.
Selected Publications
S Ayas et al, Label-Free Nanometer-Resolution Imaging of Biological Architectures through Surface Enhanced Raman Scattering, Scientific Reports, 3, 2624, 2013
S Ayas, H Guner, B Turker, OO Ekiz, F Dirisaglik, AK Okyay, A Dâna, Raman Enhancement on a Broadband Meta-Surface, ACS Nano, 2012, 6 (8), 6852–6861
Y Kaya, S Ayas, AE Topal, H Guner, A Dana, Sensitivity Comparison of Localized Plasmon Resonance Structures and Prism Coupler, Sensors and Actuators B: Chemical
Turker, B ; Guner, H ; Ayas, S ; Ekiz, OO ; Acar, H ; Guler, MO; Dâna, A. , Grating coupler integrated photodiodes for plasmon resonance based sensing, LAB ON A CHIP, 11 (2): 282-287 2011
B. Kaplan, H. Guner, O. Senlik, K.Gurel, Mehmet Bayindir, and A. Dâna, “Tuning optical discs for plasmonic applications”, Plasmonics, 4, 237 (2009).
K.Gurel, B. Kaplan, H. Guner, Mehmet Bayindir, and A. Dâna, “Resonant transmission of light through surface plasmon structures,” Applied Physics Letters, 94, 233102 (2009).
A. Kocabaş, A. Dâna and A. Aydınlı ‘Excitation of a Surface Plasmon With an Elastomeric Grating’, Appl. Phys. Lett. 89, 041123 (2006)
Atomic Force Microscopy and Nanomechanical Characterization
We are working on developing and applying techniques for multifrequency atomic force microscopy (AFM) and nanomechanical characterization using the AFM. We developed spectroscopic techniques for observation and characterization of charging of nanocomposite surfaces. We also developed a high throughput technique for mechanical characterization at the nanoscale. We are applying nanomechanical characterization techniques to biological samples and supramolecular samples.
Selected Publications
Hakan Ceylan, Mustafa Urel, Turan S Erkal, Ayse B Tekinay, Aykutlu Dâna, Mustafa O Guler, Mussel Inspired Dynamic Cross‐Linking of Self‐Healing Peptide Nanofiber Network, Advanced Functional Materials, Online DOI: 10.1002/adfm.201202291
Goksu Cinar, Hakan Ceylan, Mustafa Urel, Turan S Erkal, Emine Deniz Tekin, Ayse Begum Tekinay, Aykutlu Dâna, Mustafa O Guler, Amyloid Inspired Self-Assembled Peptide Nanofibers, Biomacromolecules, 2012, 13 (10), 3377–3387
Dagdas, YS ; Aslan, MN ; Tekinay, AB ; Guler, MO ; Dâna, A , Nanomechanical characterization by double-pass force-distance mapping Nanotechnology, 22 (29) 295704 2011
Dagdas, YS ; Tombuloglu, A ; Tekinay, AB ; Dâna, A; Guler, MO, Interfiber interactions alter the stiffness of gels formed by supramolecular self-assembled nanofibers, SOFT MATTER, 7 (7) 3524-3532 2011
U. Bostanci, M. K. Abak, O. Aktaş, A. Dâna, “Nanoscale charging hysteresis measurement by multi-frequency electrostatic force spectroscopy”, Appl. Phys. Lett. 92, 093108 (2008)
K. Abak, O. Aktaş, R. Mamadov, I. Gürsel and A. Dâna, “Parametrically coupled multi-harmonic force imaging”, Applied Physics Letters, 2008
A. Dâna and Y. Yamamoto, ‘Electrostatic force spectroscopy of near surface localized states’, Nanotechnology, 16 S125-S133, 2005
A. Dâna, F. Ho and Y. Yamamoto ‘Mechanical parametric amplification in piezoresistive gallium arsenide microcantilevers’, Appl. Phys. Lett. 72, 1152 (1998)
M. McCord, A. Dâna, F. Pease, ‘The micromechanical tunneling transistor’, J. Micromech. Microeng. 8, 209–212 (1998)
1995
Optoelectronic Properties and device applications of nanomaterials
We are investigating the optoelectronic properties of novel and nanoscale materials. As an example, we discovered electrochromic effects in graphene oxide. We also study memory devices that use graphene and silicon/germanium nanocrystals as storage media.
Selected Publications
Ekiz, OO; Urel, M ; Guner, H ; Mizrak, AK ; Dâna, A ; Reversible Electrical Reduction and Oxidation of Graphene Oxide ACS NANO, 5 (4) 2475-2482 2011
O. Altan Bozdemir, Sundus Erbas-Cakmak, O. Oner Ekiz, Aykutlu Dâna, and Engin U. Akkaya, Towards Unimolecular Luminescent Solar Concentrators: Bodipy based Dendritic Energy Transfer Cascade with Panchromatic Absorption and Monochromatized Emission, Angewandte Chemie International Edition, in press DOI: 10.1002/anie.200
Kurum, U ; Ekiz, OO ; Yaglioglu, HG ; Elmali, A ; Urel, M ; Guner, H; Mizrak, AK ; Ortac, B ; Dâna, A , Electrochemically tunable ultrafast optical response of graphene oxide , Applied Physics Letters, 98 (14) 141103 2011
Diker, H ; Varlikli, C ; Mizrak, K ; Dâna, A , Characterizations and photocatalytic activity comparisons of N-doped nc-TiO2 depending on synthetic conditions and structural differences of amine sources, ENERGY, 36 (2): 1243-1254 2011
O. E. Ekiz, A. K. Mızrak and A. Dâna, “Chemically Specific Dynamic Characterization of Photovoltaic and Photoconductivity Effects of Surface Nanostructures”, ACS Nano, 4 (4), 1851-1860 (2010).
S. Suzer, H. Sezen, G. Ertas, A. Dâna, “XPS measurements for probing dynamics of charging”, Journal of Electron Spectroscopy and Related Phenomena, 176 1-3 52-57 (2010).
A. Dâna, “Lineshapes, shifts and broadenings in dynamical X-ray photoelectron spectroscopy” , Applied Surface Science 256 5 1289-1295 (2009).
S. Suzer , H. Sezen, A. Dâna, “Two-Dimensional X-Ray Photoelectron Spectroscopy for Composite Surface Analysis” Anal. Chem., 80 (10), 3931–3936, 2008
I. B. Akça, A. Dâna, A. Aydinli, M. Rossetti, L. Li, A. Fiore, and N. Dagli, "Electro-optic and electro-absorption characterization of InAs quantum dot waveguides," Opt. Express 16, 3439-3444 (2008)
I. B. Akça, A. Dâna and A. Aydinli, “Comparison of electron and hole charge-discharge dynamics in germanium nanocrystal flash memories”, Appl. Phys. Lett. 92, 052103 (2008)
A. Dâna, I. Akça, R. Turan, A. Aydınlı and T. Finstad, ‘A Figure of Merit for the optimization of Nanocrystal Memory design’, Journal of Nanoscience and Nanotechnology, 8, 2, 510, 2008
H. Sezen, G. Ertas, A. Dâna, and S. Suzer, "Charging/Discharging Dynamics of thin PS/PMMA films as Probed by Dynamic x-ray Photoelectron Spectroscopy", Macromolecules, 40 (12), 4109-4112, 2007
S. Foss, T.G. Finstad, A. Dâna and A. Aydinli, ‘Growth of Ge Nanoparticles on SiO2 / Si Interfaces during Annealing of Plasma Enhanced Chemical Vapor Deposited Thin Films’ Thin Solid Films, 515, 16, 6381, 2007
S. Suzer, A. Dâna, G. Ertas, ‘Differentiation of Domains in Composite Surface Structures by Charge-Contrast XPS’, Anal. Chem., 79 (1), 183 -186, 2007
A. Dâna, I. Akça, O. Ergun, R. Turan, A. Aydınlı and T. Finstad, ‘Charge storage in quantized energy levels of nanocrystals’ Physica E, 38,1, 94, 2007
S. Suzer and A. Dâna, ‘X-ray Photoemission for Probing Charging / Discharging Dynamics’, J. Phys. Chem. B, 110 (39), 19112 -19115, 2006.
L. Razzari, A. Gnoli, and M. Righini, A. Dâna and A. Aydinli, ‘Excited-state dynamics and nonlinear optical response of Ge nanocrystals embedded in silica matrix’, Appl. Phys. Lett. 88 (2006) 181901
A. Dane, U. K. Demirok, A. Aydinli, S. Suzer, ‘X-ray photoelectron spectroscopic analysis of Si nanoclusters in SiO2 matrix’, J. Phys. Chem., 110 (3), 1137 -1140, 2006