Browsing by Author "Özçelik, Serdar"

Absorption spectrum of monomeric pseudoisocyanine: A new perspective and its implications for formation and spectral response of J-aggregates in solution and in thin films

Gülen, Demet; Özçelik, Serdar (Elsevier, 2008-05)

We argued against the current spectral assignment for absorption spectrum of monomeric PIC which is widely accepted since the pioneering works of Scheibe and Jelley [G. Scheibe, Angew. Chem. 49 (1936) 563; E.E. Jelly, ...

Biofunctional quantum dots as fluorescence probe for cell-specific targeting

Ağ, Didem; Bongartz, Rebecca; Eral Doğan, Leyla; Seleci, Muharrem; Walter, Johanna G.; Odacı Demirkol, Dilek; Stahl, Frank; Özçelik, Serdar; Timur, Suna; Scheper, Thomas (Elsevier, 2014-02)

We describe here the synthesis, characterization, bioconjugation, and application of water-soluble thioglycolic acid TGA-capped CdTe/CdS quantum dots (TGA-QDs) for targeted cellular imaging. Anti-human epidermal growth ...

Cholesterol Dictates the Freedom of EGF Receptors and HER2 in the Plane of the Membrane

Orr, Galya; Hu, Dehong; Özçelik, Serdar; Wiley, H. Steven; Colson, Steven D.; Opresko, Lee K. (Elsevier, 2013-10-01)

The flow of information through the epidermal growth factor receptor (EGFR) is shaped by molecular interactions in the plasma membrane. The EGFR is associated with lipid rafts, but their role in modulating receptor mobility ...

Composites of reactive silica nanoparticles and poly(glycidyl methacrylate) with linear and crosslinked chains by in situ bulk polymerization

Demir, Mustafa M.; Altın, Burcu; Özçelik, Serdar (Koninklijke Brill NV, 2010-11)

Composites of poly(glycidyl methacrylate) (PGMA) and L-lysine-coated silica nanoparticles with varying contents were prepared by in situ bulk polymerization using benzoyl peroxide (BPO) as free radical initiator. Silica ...

Controlled Formation of the Two-Dimensional TTBC J-Aggregates in an Aqueous Solution

Birkan, Burak; Gülen, Demet; Özçelik, Serdar (American Chemical Society, 2013-09-30)

Strong experimental and theoretical evidence was provided on the controlled formation of the two-dimensional J-aggregates that were assembled in the herringbone morphology. The exciton-band structure formation of ...

Controlling spontaneous emission of CdSe nanoparticles dispersed in electrospun fibers of polycarbonate urethane

Demir, Mustafa M.; Soysal, Duygu; Ünlü, Caner; Kuş, Mahmut; Özçelik, Serdar (American Chemical Society, 2009)

Luminescent fibrous composite films consisting of submicrometer diameter fibers were prepared by electrospinning of segmented polycarbonate urethane (PCU) in dimethyl formamide and tri-n-octylphosphine oxide (TOPO)-capped ...

Developing a facile 1 method for highly luminescent colloidal CdSxSe1_x ternary nanoalloys†

Ünlü, Caner; Ünal Tosun, Gülçin; Sevim, Seçil; Özçelik, Serdar (Royal Society of Chemistry, 2013)

We report a facile method to synthesize highly luminescent colloidal CdSxSe1 xternary nanoalloys. The synthesis is achieved exactly in one-step, one-pot and at low temperature, by applying the two-phase thermal approach. ...

Development of a novel electrocardiography sensor based on a composite silver chloride nanoparticles and polyaniline

Taşcıoğlu, Didem (İzmir Institute of Technology, 2013)

The electrical activity of the heart is detected by electrodes attached to the surface of the skin. These electrodes detect bioelectrical signals in the human body. Physilogical status of heart condition especially ...

Development of colloidal alloyed nanocrystals for quantum dot based device applications

Sevim Ünlütürk, Seçil (Izmir Institute of Technology, 2018-06)

Quantum dots (QDs) are very attractive luminescent semiconducting nanoparticles. In this study, our aim was to synthesize Cd and/or Zn based QDs with tunable optical properties by the particle size and the alloy ...

Development of copper and manganese doped ternary colloidal quqntum dot alloys

Yırtıcı, İlayda Melek (Izmir Institute of Technology, 2019-01)

Semiconductor nanocrystals have great interest due to their unique optical properties such as the particle size and the alloy composition dependent spectra, photochemical and colloidal stability. They have wide range of ...

Development of semiconductor nanocrystals for biotechnological applications

Ünlü, Caner (İzmir Institute of Technology, 2008)

Semiconductor nanocrystals are very useful tools in biological applications because of their unique optical properties. In this study, synthesis and characterization of CdTe / CdS and CdSexS1-x nanocrystals were carried ...

Dynamic nuclear polarization of spherical nanoparticles

Akbey, Ümit; Altın, Burcu; Linden, Arne; Özçelik, Serdar; Gradzielski, Michael; Oschkinat, Hartmut (Royal Society of Chemistry, 2013-12)

Spherical silica nanoparticles of various particle sizes (∼10 to 100 nm), produced by a modified Stoeber method employing amino acids as catalysts, are investigated using Dynamic Nuclear Polarization (DNP) enhanced Nuclear ...

The effects of engineered silica nanoparticles on the cellular behaviours of human hepatocellular carcinoma cell lines

Tüncel Çerik, Özge (Izmir Institute of Technology, 2018-07)

Physicochemical properties of the silica nanoparticles have vital roles in determining the physiological behaviours of the cells. Applications of nanoparticle treatments have some outcomes as a response of the cells in ...

Enthalpy-driven selective loading of CdSe0.75S0.25 nanoalloys in triblock copolymer polystyrene-b-polyisoprene-b-polystyrene

Aşkın, Görkem; Çeçen, Volkan; Ünlütürk, Seçil Sevim; Özçelik, Serdar; Demir, Mustafa M. (Elsevier, 2016-09-01)

CdSe0.75S0.25 nanoalloys were blended with asymmetric triblock copolymer of polystyrene-b-polyisoprene-b-polystyrene(PS-SIS) in tetrahydrofuran. The fraction of styrene block varies from 14 to 22% with respect to isoprene ...

Erratum: Optical transition rates of a meso-substituted thiacarbocyanine in methanol-in-oil reverse micelles (Journal of Luminescence (2005) 113 (1-8) DOI:10.1016/j.jlumin.2004.07.009)

Özçelik, Serdar; Atay, N. Zeynep (Elsevier, 2005-09)

The correct correspondence information for the first author is: Serdar Özçelik Chemistry Department, Izmir Institute of Technology, Urla-35430 Izmir, Turkey E-mail address: serdarozcelik@iyte.edu.tr Tel.: +90 232 750 ...