Profile URL: https://hdl.handle.net/20.500.13091/14830
Job Title:Öğr. Gör.
Email Address:ykurtulus@ktun.edu.tr
Main Affiliation:01. Konya Technical University
Status: Current Staff
ORCID:
0000-0002-6813-6153
0000-0002-6813-6153YÖK Akademik: CB82E168B2BCB52B
Google Scholar:
DZAnkPMAAAAJ
DZAnkPMAAAAJWeb of Science ID:
GGA-1625-2022
GGA-1625-2022Name Variants:
Yilmaz, Kurtulus Yılmaz, K.
17 results
Scholarly Output Search Results
Now showing 1 - 10 of 17
Article Citation - WoS: 20Citation - Scopus: 19Vapor Deposition of Transparent Antifogging Polymeric Nanocoatings(AMER CHEMICAL SOC, 2021) Yılmaz, Kurtuluş; Gürsoy, Mehmet; Karaman, MustafaThis study demonstrates the coating of a transparent and robust organic thin film having an excellent hydrophilicity-based antifogging property by an initiated chemical vapor deposition (iCVD) method. iCVD was able to synthesize linear and cross-liked poly(acrylic acid) (PAA) from the vapors of acrylic acid (AA) and ethylene glycol dimethacrylate (EGDMA) using tert-butyl peroxide (TBPO) as an initiator. High deposition rates of up to 35 nm/min were observed at low deposition temperatures. It was possible to control the quantity of comonomers in the as-deposited films by adjusting the partial pressure of the EGDMA cross-linking agent. The effect of the EGDMA partial pressure on chemical structure was studied using Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) techniques. FTIR and XPS spectra of the as-deposited films showed the complete retention of the monomer functionality during iCVD. Hydrophilicities and large-area uniformity of the coatings were revealed using water contact angle measurements. The as-deposited PAA film was the most hydrophilic with a water contact angle (WCA) of 7.0 degrees, while cross-linking with EGDMA increased the WCA values by up to 51.7 degrees. Results of various tests, which were based on exposing the coated surfaces to artificial fog and hot water vapor, showed the excellent antifogging property of the coatings. Films were never fogged upon extensive and long-term exposure (2 months) to humid air.Article Citation - Scopus: 4Self-Powered Polyaniline/Si NIR Photodetectors for Waste Classification: Fabrication, Optimization, and Application(American Chemical Society, 2025) Hussaini, Ali Akbar; Yilmaz, Kurtulus; Karaman, Mustafa; Yildirim, MuratRapid rise in the population and urbanization has led to increased waste generation, creating significant challenges for efficient waste management. Although recycling remains effective, manual sorting of diverse materials limits the scalability. In this study, we report the fabrication and optimization of polyaniline (PANI) interlayer-based photodetectors with varying film thicknesses by using plasma-enhanced chemical vapor deposition (PECVD). PANI films were characterized via UV-vis spectroscopy, FTIR, XPS, and AFM. Devices were tested under varying solar light intensities and a broad wavelength range (351-1600 nm). The photodetector with a 200 nm PANI layer exhibited the best performance, achieving a responsivity of 1.013 A/W, detectivity of 1.34 x 1011 Jones, and EQE of 114.2% under self-powered operation. We propose the use of this device for waste classification, shifting from conventional reflected NIR signal analysis to examining transmitted near-infrared (NIR) wavelengths through waste samples. Our results show that photocurrent, responsivity, and EQE from the PANI/n-Si heterojunction can reliably distinguish material types. This work demonstrates the potential of self-powered NIR photodetectors to enable automated, scalable, and efficient waste classification systems.Article Synthesis of P(n-Isopropyl Acrylamide- Hydroxypropyl Methacrylate) Thermo Responsive Copolymer Films by Initiated Chemical Vapor Deposition Method(Konya Teknik Univ, 2024) Sevgili Mercan, Emine; Yilmaz, Kurtulus; Karaman, Mustafa; Mercan, Emine SevgiliThis study illustrates the deposition of thermo responsive p(N-isopropyl acrylamidehydroxypropyl methacrylate) p(NIPAAm-HPMA) copolymer thin films by initiated chemical vapor deposition (iCVD) method using tert-butyl peroxide (TBPO) as the initiator. Copolymers were deposited at three different HPMA flow rates and the effects of NIPAAm/HPMA flow rate ratio on the deposition rate, structure and responsive properties of the as-deposited films were investigated. The highest deposition rate of 50 nm/min was observed for the copolymer deposited using lowest NIPAAm/HPMA monomer ratio studied. The deposition rate showed a significant increase with decreasing NIPAAm/HPMA flow ratio. Results of FTIR and XPS spectroscopy analyses revealed a significant preservation of structural retention in iCVD p(NIPAAm-HPMA) thermo-responsive films. Lower critical solution temperatures (LCST) of p(NIPAAm-HPMA) films were determined by carrying out a temperature-dependent contact angle analysis. Accordingly, it was shown that LCST was varied between 19 and 23 degree celsius, which was observed to be dependent on the NIPAAm/HPMA monomer ratio. That LCST range is considerably below the literature- reported values for pNIPAAM, which makes the as-deposited copolymer suitable for applications that require thermos-responsive properties at lower temperatures.Other Oxidative Chemical Vapor Deposition (Ocvd) of Pedot on Ito/Glass Surfaces for Nonenzymatic Detection of Dopamine(2024) Yılmaz, Kurtuluş; Hussaini, Ali Akbar; Yıldırım, Murat; Karaman, MustafaOther Environmentally Friendly and All-Dry Hydrophobic Patterning of Graphene Oxide for Fog Harvesting(2023) Yılmaz, Kurtuluş; Gürsoy, Mehmet; Karaman, MustafaArticle Raster Orientation Effects on the Adhesion of ICVD-Deposited PSA Thin Films on FDM-Printed PLA(MDPI, 2026) Gunes, Aydin; Yilmaz, Kurtulus; Gursoy, Mehmet; Karaman, MustafaThe adhesion performance of pressure-sensitive adhesive (PSA) thin films on additively manufactured polymers is strongly governed by surface anisotropy induced during printing. In this study, PSA thin films based on 2-ethylhexyl acrylate (EHA) and acrylic acid (AA) were deposited by initiated chemical vapor deposition (iCVD) onto fused deposition modeling (FDM) printed PLA substrates with different raster orientations (0 degrees, 30 degrees, 60 degrees, and 90 degrees). The deposited films exhibited high optical transparency on glass, and thicknesses consistent with the targeted deposition. Adhesion performance was evaluated using tensile and three-point bending tests, revealing a strong dependence on raster orientation. The 0 degrees raster orientation yielded the highest shear adhesion strengths, reaching 12.03 N/cm2 under tensile loading and 4.59 N/cm2 under bending, along with the largest failure displacements. In contrast, specimens printed at 90 degrees exhibited an approximately 47% reduction in tensile shear adhesion strength and limited deformation prior to failure. SEM analysis showed that raster alignment parallel to the loading direction promoted extensive adhesive deformation and PSA fibrillation, whereas higher raster angles resulted in predominantly interfacial debonding. These results demonstrate that raster orientation is a critical design parameter for tuning PSA adhesion on FDM-printed PLA substrates without modifying adhesive chemistry.Article Limonene Functionalization of Recycled PAN Nanofibers for Chicken Breast Meat Preservation(Springer, 2026) Asikkutlu, Aliye; Hussaini, Ali Akbar; Yilmaz, Kurtulus; Yildirim, Murat; Saricoban, Cemalettin; Karaman, MustafaIn this study, waste commercial acrylic textile fibers composed of PAN-based copolymers were recycled into functional PAN nanofibers and subsequently coated with limonene using the plasma-enhanced chemical vapor deposition (PECVD) method to develop antibacterial, antioxidant, and UV-shielding food packaging materials. This approach demonstrates a facile and scalable strategy for the valorization of PAN waste into a feasible and industrially applicable novel packaging film. PAN nanofibers were fabricated by electrospinning and subsequently coated with poly(limonene) using plasma-enhanced chemical vapor deposition (PECVD) for different durations (10, 20, and 40 min). The structural, morphological, optical, and surface properties of the nanofibers were comprehensively characterized using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDS), ultraviolet-visible spectroscopy (UV-Vis), and water contact angle measurements (WCA). FTIR and EDS analyses confirmed the successful deposition of poly(limonene) without altering the chemical integrity of the PAN substrate. SEM images revealed uniform, porous nanofibrous structures with increasing fiber diameter as the coating duration increased. UV-Vis analysis demonstrated enhanced UV-shielding performance, particularly in the UV-B and UV-C regions, while surface wettability measurements showed a significant transition from hydrophilic to hydrophobic behavior after coating. The functional performance of the nanofibers was evaluated by monitoring pH, color stability, antioxidant activity, lipid oxidation, and microbiological quality of coated chicken breast meat during 5 days of refrigerated storage. Limonene-loaded nanofibers significantly delayed microbial growth, reduced lipid oxidation, and enhanced antioxidant activity compared to the control. These results demonstrate that poly(limonene)-coated PAN nanofibers with an optimized coating duration are promising candidates for active food packaging applications aimed at extending shelf life and maintaining product quality.Article Citation - WoS: 28Citation - Scopus: 25Initiated Chemical Vapor Deposition of Poly(ethylhexyl Acrylate) Films in a Large-Scale Batch Reactor(AMER CHEMICAL SOC, 2019) Yılmaz, Kurtuluş; Şakalak, Hüseyin; Gürsoy, Mehmet; Karaman, MustafaThe present study demonstrates the successful deposition of poly(ethylhexyl acrylate) thin films in a large-scale closed-batch initiated chemical vapor deposition (iCVD) system. A horizontal cylindrical stainless-steel vacuum tank, which is highly utilized in industrial vacuum applications, was used as iCVD reactor. The effects of substrate temperature, precursor ratio, and pressure on the deposition rates were studied, and the results showed that a deposition rate of 315 nm/min can be achieved in a single run at a reactor pressure of 600 mTorr. At a lower chamber pressure of 400 mTorr, deposition rate decreases, whereas film uniformity increases. By carrying out depositions at successive cycles, thicker films could be obtained, without the need for extensive monomer consumption. The yield percentage was found to be 3.5 for the films deposited in closed-batch system at 400 mTorr, which is 35-fold larger than that of the classical iCVD flow system.Other Roll-to-Roll Oxidative Chemical Vapor Deposition of Highly Conductive and Uniform Thin Films on Large-Scale Textile Substrates(2025) Yılmaz, Kurtuluş; Karaman, MustafaArticle Investigation of Fog Harvesting Performance of Functional Thin Film-Coated 3D Surfaces(2025) Coplan, Meryem; Yılmaz, Kurtuluş; Gürsoy, Mehmet; Mercan, Emine Sevgili; Karaman, MustafaTemiz suya erişim, doğal tatlı su kaynaklarının tükenmesi, küresel ısınma ve artan dünya nüfusu gibi etkenler nedeniyle, günümüzde karşılaşılan en önemli küresel sorunlardan biridir. Temiz su üretimi için genellikle ters ozmoz ve tuzdan arındırma yöntemleri kullanılmaktadır; ancak bu yöntemler yüksek yatırım ve enerji maliyetlerine sahiptir ve bu durum yaygın kullanımını sınırlamaktadır. Son yıllarda, atmosferik su toplama yöntemi olarak sis kullanımı, enerji verimli, düşük maliyetli ve çevre dostu bir alternatif yöntem olarak öne çıkmaktadır. Ancak, geleneksel sis toplama ağlarının verimliliği düşüktür ve bu durum, daha yüksek verimle sis toplayabilen malzemelerin geliştirilmesine olan ilgiyi artırmıştır. Bu çalışmada, çeşitli topografik yapılara sahip yüzeyler 3D baskı ile üretilmiş ve çevre dostu bir yöntem olan plazma destekli kimyasal buhar biriktirme (PECVD) tekniği kullanılarak, tek adımda hidrofilik poliakrilik asit (PAA) ve hidrofobik poliheksaflorobütil akrilat (PHFBA) ince filmlerle kaplanmıştır. Ayrıca, hem hidrofilik hem de hidrofobik özellikler gösteren yüzeyler tasarlanıp üretilmiştir. Kaplanmış yüzeylerin kimyasal yapısı, topografik özellikleri ve ıslanabilirlik karakteristikleri kapsamlı bir şekilde karakterize edilmiştir. Farklı yüzey yapıları ve ıslanabilirlik özelliklerine sahip toplam 22 örnek üretilmiştir. Sis toplama deneyleri, kontrol yüzeyle karşılaştırıldığında, geliştirilen yüzey tasarımlarının sis toplama veriminde %270'e varan artış sağladığını ortaya koymuştur. Elde edilen sonuçlar, yüzey topografyası ve ıslanabilirliğin sis toplama performansını etkileyen temel faktörler olduğunu göstermektedir.
Research Topics
Domains
Physical Sciences
Fields
Materials ScienceEngineering
Subfields
Surfaces, Coatings and FilmsBiomedical EngineeringPolymers and Plastics
Specific Research Areas
Surface Modification and Superhydrophobicity
Advanced Sensor and Energy Harvesting Materials
Conducting polymers and applications
Nanofabrication and Lithography Techniques
Polymer Surface Interaction Studies
Sustainable Development Goals
11SUSTAINABLE CITIES AND COMMUNITIES
2
Research Products
12RESPONSIBLE CONSUMPTION AND PRODUCTION
1
Research Products
This researcher does not have a Scopus ID.
Documents
20
Citations
238
Publication Collaboration
| Affiliation Name | Count |
|---|---|
| Konya Technical University | 25 |
| Selçuk University | 11 |
| Gazi University | 2 |
| Teknoloji Arastirma ve Gelistirme Endustriyel Urunler Bilisim Teknolojileri San Tic | 1 |
| Amasya Üniversitesi | 1 |
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Data obtained from OpenAlex
| Journal | Count |
|---|---|
| SSRN Electronic Journal | 3 |
| Polymers | 2 |
| DergiPark (Istanbul University) | 1 |
| Fibers and polymers | 1 |
| Fibers and Polymers | 1 |
Current Page: 1 / 3
Scholarly Output
17
Articles
14
Views / Downloads
25/0
Supervised MSc Theses
0
Supervised PhD Theses
0
WoS Citation Count
64
Scopus Citation Count
61
Patents
0
Projects
0
WoS Citations per Publication
3.76
Scopus Citations per Publication
3.59
Open Access Source
9
Supervised Theses
0
Scopus Quartile Distribution
Competency Cloud
