Nanotechnology Research Center (NANOTAM)
Recent Submissions
-
How to build prussian blue‐based water oxidation catalytic assemblies? Common trends and strategies
(Wiley-VCH Verlag GmbH & Co. KGaA, 2021)Prussian blue (PB) and its analogues (PBAs) have at least a three-century-long history in coordination chemistry. Recently, cobalt-based PBAs have been acknowledged as efficient and robust water oxidation catalysts. Given ... -
Exceptional adaptable MWIR thermal emission for ordinary objects covered with thin VO2 film
(Elsevier Ltd, 2021-01-25)Monotonous thermal radiation emitted from an ordinary object can be brought into a dynamic and versatile form that can be shaped according to the application area with the ingenious design of the surface coatings. Building ... -
Current transport properties of (Au/Ni)/HfAlO3/n-Si metal–insulator–semiconductor junction
(Elsevier Ltd, 2020-09-11)In this study, HfAlO3 ternary alloy thin film was grown on n-type silicon using the atomic layer deposition method. The current transport mechanisms in the (Au/Ni)/HfAlO3/n-Si junction were examined over a wide temperature ... -
The pulse shape effect on signal-to-noise ratio for φ-OTDR systems
(Optica Publishing Group, 2021)We experimentally investigate the effect of the probe pulse shape on the performance of φ-OTDR based distributed vibration sensors by comparing the SNR values for rectangular, Gaussian and triangular pulses. -
Spatial resolution analysis of dual-pulse ϕ-OTDR systems
(Optica Publishing Group, 2021)This work analyzes the spatial resolution of the dual-pulse -OTDR systems by changing the dual-pulse parameters and demonstrates that the spatial resolution corresponds to half of the fiber region occupied by the dual-pulse train. -
Interactions between densely grafted molten polymer brushes: scaling theories versus molecular simulations
(Scientific and Technical Research Council of Turkey - TUBITAK,Turkiye Bilimsel ve Teknik Arastirma Kurumu, 2021-02-27)Using molecular dynamics simulations and scaling arguments, we analyzed the interactions between two identical molten polymer brushes intermediately and strongly compressed towards each other at melt conditions. The width ... -
Hollow-core optical fiber with eight-pointed star cladding structure for low-loss transmission in telecom bands
(Scientific and Technical Research Council of Turkey - TUBITAK,Turkiye Bilimsel ve Teknik Arastirma Kurumu, 2021-04-29)In this study, a novel negative curvature hollow-core fiber is proposed for low-loss transmission in the near-infrared region. We numerically investigate the effect of the cladding structure, which is formed of concentrically ... -
High transparent, low surface resistance ZTO/Ag/ZTO multilayer thin film electrodes on glass and polymer substrates
(Elsevier, 2021-02-02)Zinc tin oxide (ZTO)/Ag/ZTO multilayer thin films were grown by direct current (DC) magnetron sputtering technique at room temperature on soda lime glass (SLG) and different polymer substrates such as polycarbonate (PC) ... -
Transferring the structure of paper for mechanically durable superhydrophobic surfaces
(Elsevier, 2020-10-24)Solution-phase deposition of nanomaterials represents a highly promising technology with strong industrial application potential for the fabrication of superhydrophobic surfaces. An important barrier towards the adaptation ... -
An investigation of fidelity regions in the dual-pulse 𝝓-OTDR systems
(The Optical Society, 2021)The dual-pulse interrogation enables the phase extraction from the intensity of the backreflection signal in 𝜙-OTDR systems. We investigate the high and low fidelity regions in the back-reflected signal by analyzing the ... -
A simple parity-time-symmetric optoelectronic oscillator based on all-fiber coupling
(The Optical Society, 2021)We experimentally demonstrate a simple parity-time-symmetric optoelectronic oscillator based on all-fiber coupling with single-mode microwave oscillation at 9.5 GHz possessing a phase noise value of −116.2 dBc/Hz at 10 kHz offset. -
A large-signal behavioural modeling approach of GaN HEMTs for power amplifier design
(Institute of Electrical and Electronics Engineers Inc., 2021-01-10)A new method to simulate the large-signal behaviour of GaN HEMTs is presented along with the two 15W X-band MMIC Class AB power amplifier (PA) designs using the same methodology. Proposed modeling approach is based on ... -
Determining thermo-mechanical stress sources of an integrated optical device
(Elsevier, 2021-05-24)In this study, we analyze the thermo-mechanical behavior of a multi-functional integrated optical chip (MIOC) via the finite element method (FEM). MIOC is a kind of fiber optic component which has a high thermal sensitivity. ... -
Substrate effects on electrical parameters of Dirac fermions in graphene
(Elsevier, 2021-05-19)The substrate effects on the electronic transport properties of single-layer graphene on TiO2/Si substrate have been studied. The Hall mobility, sheet carrier density, and transport lifetime were obtained from the ... -
Rose petal topography mimicked poly(dimethylsiloxane) substrates for enhanced corneal endothelial cell behavior
(Elsevier, 2021-04-30)Low proliferation capacity of corneal endothelial cells (CECs) and worldwide limitations in transplantable donor tissues reveal the critical need of a robust approach for in vitro CEC growth. However, preservation of ... -
Eighty nine-watt cascaded multistage power amplifier using gallium nitride-on-silicon high electron mobility transistor for L-band radar applications
(The Institution of Engineering and Technology, 2021-11)This work presents a gallium nitride (GaN) high electron mobility transistor (HEMT)–based cascaded multistage power amplifier (MPA) in class-AB for L-band radar applications. The purpose of this endeavour is to develop an ... -
Single nozzle electrospinning promoted hierarchical shell wall structured zinc oxide hollow tubes for water remediation
(Elsevier, 2021-03-09)Hypothesis Electrospun metal oxide hollow tubes are of great interest owing to their unique structural advantages compared to solid nanofibers. Although intensive research on preparation of hollow tubes have been devoted, ... -
SERS-active linear barcodes by microfluidic-assisted patterning
(Elsevier, 2020-09-28)Simple, low-cost, robust, and scalable fabrication of microscopic linear barcodes with high levels of complexity and multiple authentication layers is critical for emerging applications in information security and ... -
Structure and properties of KNi–hexacyanoferrate Prussian Blue Analogues for efficient CO2 capture: Host–guest interaction chemistry and dynamics of CO2 adsorption
(Elsevier, 2021-06-04)Potassium Nickel hexacyanoferrate Prussian Blue Analogues (K-NiFe-PBAs) offer an excellent platform for efficient CO2 capture due to their porous nature and accessible channels. Herein, the effect of Ni:K atomic ratio on ... -
Cascaded contraction-expansion channels for bacteria separation from RBCs using viscoelastic microfluidics
(Elsevier, 2021-06-29)Implementation of viscoelasticity-based particle migration techniques has attracted significant interest thanks to its simplicity to achieve particle separation and enrichment at high sensitivity and accuracy for the last ...
RSS 1.0