Karaman, Mustafa
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Name Variants
Karaman, M. Karaman, Mustafa
Job Title
Email Address
mkaraman@ktun.edu.tr
Main Affiliation
02.01. Department of Chemical Engineering
Status
Current Staff
Website
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Research Topics
Domains
Health SciencesPhysical Sciences
Fields
MedicineMaterials ScienceEngineering
Subfields
Radiology, Nuclear Medicine and ImagingSurfaces, Coatings and FilmsMechanics of MaterialsBiomedical Engineering
Specific Research Areas
Ultrasound Imaging and Elastography
Surface Modification and Superhydrophobicity
Ultrasonics and Acoustic Wave Propagation
Advanced Sensor and Energy Harvesting Materials
Photoacoustic and Ultrasonic Imaging
Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
0
Research Products
3GOOD HEALTH AND WELL-BEING
1
Research Products
4QUALITY EDUCATION
0
Research Products
5GENDER EQUALITY
0
Research Products
6CLEAN WATER AND SANITATION
10
Research Products
7AFFORDABLE AND CLEAN ENERGY
8
Research Products
8DECENT WORK AND ECONOMIC GROWTH
0
Research Products
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
1
Research Products
10REDUCED INEQUALITIES
0
Research Products
11SUSTAINABLE CITIES AND COMMUNITIES
2
Research Products
12RESPONSIBLE CONSUMPTION AND PRODUCTION
2
Research Products
13CLIMATE ACTION
2
Research Products
14LIFE BELOW WATER
0
Research Products
15LIFE ON LAND
0
Research Products
16PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
17PARTNERSHIPS FOR THE GOALS
0
Research Products
Documents
80
Citations
1706
h-index
24
Documents
103
Citations
2201
Publication Collaboration
| Affiliation Name | Count |
|---|---|
| Konya Technical University | 63 |
| Selçuk University | 50 |
| Işık University | 46 |
| Stanford University | 29 |
| Georgia Institute of Technology | 26 |
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Data obtained from OpenAlex
Scholarly Output
66
Articles
60
Views / Downloads
213/413
Supervised MSc Theses
3
Supervised PhD Theses
3
WoS Citation Count
832
Scopus Citation Count
903
Patents
0
Projects
0
WoS Citations per Publication
12.61
Scopus Citations per Publication
13.68
Open Access Source
23
Supervised Theses
6
| Journal | Count |
|---|---|
| Progress in Organic Coatings | 2 |
| Progress In Organic Coatings | 2 |
| JOURNAL OF APPLIED POLYMER SCIENCE | 2 |
| SEPARATION AND PURIFICATION TECHNOLOGY | 2 |
| Polymers | 2 |
Current Page: 1 / 11
Scopus Quartile Distribution
Competency Cloud
66 results
Scholarly Output Search Results
Now showing 1 - 10 of 66
Article Citation - WoS: 20Citation - Scopus: 19Vapor Deposition of Transparent Antifogging Polymeric Nanocoatings(AMER CHEMICAL SOC, 2021-01-28) 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 - WoS: 8Citation - Scopus: 9Uniform Deposition of Large-Area Graphene Films on Copper Using Low-Pressure Chemical Vapor Deposition Technique(Springer Japan Kk, 2021-11-29) Gürsoy, Mehmet; Çıtak, Emre; Karaman, MustafaLarge-area graphene of the order of centimeters was deposited on copper substrates by low-pressure chemical vapor deposition (LPCVD) using hexane as the carbon source. The effect of temperature and the carrier gas flowrates on the quality and uniformity of the as-deposited graphene was investigated using the Raman analysis. The film deposited at 870 degrees C with a total carrier gas flowrate of 50 sccm is predominantly single-layer with very low defects according to the Raman spectra. The 2D/G peak intensity ratios obtained from the Raman spectra of samples from three different locations of graphene deposited on a whole copper catalyst was used to calculate the large-area uniformity. Based on the results, a very high uniformity of 89.6% was calculated for the graphene deposited at 870 degrees C. The uniformity was observed to decrease with increasing temperature. Similar to the thickness uniformity, the electrical conductivity values obtained as a result of I-V measurements and water contact angle measurements were found to be close to each other for the graphene deposited under the same deposition conditions.Article Citation - WoS: 17Citation - Scopus: 19Enhanced Visible Light Photocatalytic Degradation of Organic Pollutants by Iron Doped Titania Nanotubes Synthesized Via Facile One-Pot Hydrothermal(ELSEVIER, 2020-04-01) Subramaniam, M. N.; Goh, P. S.; Lau, W. J.; Ismail, A. F.; Karaman, M.The photoactivity of iron doped titania nanotubes (Fe-TNT) synthesized via facile hydrothermal technique was investigated using reactive black 5 (RB 5) as the model pollutant. The incorporation of iron (Fe) nanoparticles in titania nanotubes (TNT) structure was confirmed via x-ray diffraction while x-ray photoelectron spectroscopy analysis showed the presence of Fe3+ ions in the nanotube structure. Ultraviolet-visible spectrophotometer analysis confirmed the reduction in band gap energy, from 3.595 eV to 2.097 eV due to the interaction between Fe into TNT structure. The formation of tubular structure has also increased the specific surface area of the photocatalyst from 56.00 m(2)/g to between 246.23 m(2)/g to 142.01 m(2)/g for all Fe-TNT. Fe-TNT with Fe:Ti ratio of 1:3 demonstrated promising photodegradation efficiency of 90% within 120 min of visible light irradiation. The reduced band gap energy and improved visible light responsiveness imparted by incorporation of Fe nanoparticles into structure of TNT are the main factors for improved photocatalytic degradation. (C) 2020 Elsevier B.V. All rights reserved.Article Citation - WoS: 19Citation - Scopus: 19Hydroxypropyl Methacrylate Thin Film Coating on Polyvinylidene Fluoride Hollow Fiber Membranes Via Initiated Chemical Vapor Deposition(PERGAMON-ELSEVIER SCIENCE LTD, 2020-01-01) Subramaniam, M. N.; Goh, P. S.; Mercan Sevgili, Emine; Karaman, M.; Lau, W. J.; Ismail, A. F.; Sevgili, E.Thin films of hydroxypropyl methacrylate (HPMA) were grown on polyvinylidene fluoride (PVDF) hollow fiber membranes via initiated chemical vapor deposition (iCVD), utilising di-tert-butyl peroxide as radical initiator. This method was able to completely coat PVDF membranes, producing uniform deposition of hydrophilic HPMA of 50 nm and 100 nm thickness on the membrane surface. The deposition of HPMA layer has been evidenced from the microscopy images and Fourier transform infra-red spectra. The HPMA coated membranes exhibited significantly improved surface hydrophilicity as reflective from the reduction in water contact angle from 78.1 degrees to 23.6 degrees meanwhile the membrane surface roughness was reduced with the thin film coating. The separation performance of HPMA-PVDF membranes was evaluated in the treatment of in-house prepared synthetic aerobically-treated palm oil mill effluent (AT-POME), which consists of lignin and tannic acid (TA). 100HPMA-PVDF membranes exhibited improved membrane flux and rejection of 50.8L/m(2)h and 83.1%, respectively. Additionally, 100HPMA-PVDF membrane maintained stable high permeation and rejection properties after four filtration cycles, due to its greatly improved surface hydrophilicity and reduced surface roughness. The studies open possibilities for highly controlled surface modification of membranes using low temperature iCVD methods to tailor the membrane selective layer.Article Citation - WoS: 8Citation - Scopus: 8Implementation of the Pecvd Process To Produce a Novel Range of Filler-Polymer Perlites for Use in Epoxy Composites(Korean Society of Industrial Engineering Chemistry, 2024-05-01) Kara, A.S.; Ahmetli, G.; Karaman, M.; Kocaman, S.; Işık, M.; Gürsoy, M.This study examines the use of expanded perlite powder (ExP), a natural rock, as reinforcement in bisphenol-A type epoxy resin. The surface of ExP has been coated using the PECVD method with different polymers such as poly(hexafluorobutyl acrylate) (PHFBA) and poly(glycidyl methacrylate) (PGMA). ExPs before and after the coating process underwent characterization using various techniques such as X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Scanning Electron Microscopy (SEM). The effects of filler ratio and different polymer coatings on composite properties were investigated. The higher tensile strengths for uncoated, PHFBA-coated, and PGMA-coated ExP composites were determined as 109 MPa, 132 MPa, and 152 MPa, respectively. The surfaces of the polymer-coated ExP composites were found to be hydrophobic and water sorption was lower in these composites. ExPs have improved thermal stability and flammability properties. In addition, PHFBA-coated ExP composite was found more resistant to UV radiation and the hydrothermal environment. © 2023 The Korean Society of Industrial and Engineering ChemistryArticle Citation - WoS: 42Citation - Scopus: 46Initiated Chemical Vapor Deposition of Poly(hexafluorobutyl Acrylate) Thin Films for Superhydrophobic Surface Modification of Nanostructured Textile Surfaces(SPRINGER, 2019-11-14) Şimşek, Büşra; Karaman, MustafaThis study demonstrates the synthesis of poly(hexafluorobutyl acrylate) (PHFBA) thin films on textile substrates using initiated chemical vapor deposition (iCVD) method. Owing to its short perfluoroalkyl functional group, PHFBA is a suitable low-surface-energy finish that can be used for hydrophobic functionalization of textile surfaces. During iCVD of PHFBA, the use of initiator helped to achieve deposition rates up to 83 nm/min, which is nearly twice that achieved by PECVD. FTIR and XPS analyses of as-deposited films showed very high retention of carbonyl and perfluoroalkyl functionalities. Polyester and cotton fabrics were made superhydrophobic after conformal coating of PHFBA by iCVD. The decoration of fabric surfaces by SiO2 nanoparticles prior to the iCVD coating helped to create composite structures having dual-scale roughness. The final SiO2-treated and iCVD-PHFBA-coated textile fabrics showed very high water contact angles (> 165 degrees).Article Citation - WoS: 8Citation - Scopus: 8Vapor Deposition of Poly(hexafluorobutyl Acrylate) Nanocoating for Encapsulation of Organic Solar Cells(Elsevier Science Sa, 2023-04-01) Yurtdaş, Semih; Tozlu, Cem; Karaman, MustafaThe biggest problem of organic photovoltaics is their quickly deterioration in atmospheric conditions. O2 and moisture in the air affect device performance negatively. In this study, at first, it is determined which electrical parameter used in the device efficiency calculation is affected by atmospheric conditions. For this context, produced devices were kept in room conditions, desiccator, and glovebox, respectively. Stability tests were performed for 8 weeks. According to the results, predominantly, current density (Jsc) is affected by O2, open circuit voltage (Voc) is affected by moisture while fill factor (FF) is affected by both O2 and moisture. Normalized efficiency (eta) values are decreased, the devices kept in room conditions, desiccator, and glovebox, 90 %, 60 %, and 20 %, respectively. In the second part, devices were encapsulated with poly(Hexafluorobutylacrylate) (PHFBA) using batch initiated chemical vapor deposition (iCVD) technique at varying thicknesses. FTIR and XPS studies revealed successful PHFBA polymerization coatings. Efficiency losses for encapsulated devices was measured as between 30 and 35 %. When the non-encapsulated and encapsulated devices kept under room conditions were compared, the reductions in efficiency were found to be 90 % versus 30 %. According to the results, PHFBA has good barrier properties against O2 and moisture.Article Citation - WoS: 13Citation - Scopus: 14Calixarene-Tethered Textile Fabric for the Efficient Removal of Hexavalent Chromium From Polluted Water(ELSEVIER, 2021-10-01) Özçelik, Egemen; Mercan Sevgili, Emine; Erdemir, Serkan; Karaman, Mustafa; Tabakcı, Mustafa; Mercan, Emine SevgiliThis study describes the tethering of dimethylamionomethyl bonded calixarene (DMAM-calixarene) onto cotton fabric surface functionalized with poly(glycidyl methacrylate) (PGMA) linker layer using initiated chemical vapor deposition (iCVD) technique and the efficient adsorption capability of DMAM-calixarene functional textiles for the toxic hexavalent chromium from polluted water. The characterization of DMAM-calixarene-tethered textile fabric was performed by FTIR and XPS spectroscopy. Cr(VI) solutions was passed over packed DMAMcalixarene-tethered textile fabric adsorbent and the highest adsorption was observed at pH 2 in dichromate anion form of COS. The regeneration and selectivity studies indicate that the DMAM-calixarene-tethered textile fabric has outstanding adsorbent features in used experimental conditions for hexavalent chromium. Moreover, it was observed that both H-bonding and electrostatic interactions were significant factors in the dichromate anion adsorption process. Thus, this study clearly revealed that any DMAM-calixarene-tethered textile fabric can be easily used as a selective hexavalent chromium capture filter in geographic regions lacking appropriate wastewater purification systems.Article Citation - WoS: 2Citation - Scopus: 3High-Performance Uv–vis–nir Photodetectors Based on Pedot Obtained by Plasma-Enhanced Chemical Vapor Deposition(John Wiley and Sons Inc, 2025-01-19) Hussaini, A.A.; Yılmaz, K.; Karaman, M.; Yıldırım, M.This study presents the fabrication of organic UV–vis–NIR photodetectors based on poly(3,4-ethylenedioxythiophene) (PEDOT) thin films synthesized via a plasma-enhanced chemical vapor deposition at 10, 20, and 30 W plasma power. The effects of plasma power on polymerization, as well as optical, structural, morphological, and optoelectronic properties, are analyzed using UV–vis, Fourier transform infrared spectroscopy, scanning electron microscope, and scanning electron microscopy–energy-dispersive X-ray. The films, exhibiting a bandgap of 3.52–3.59 eV, are uniformly coated on Si surfaces. Photodiode and photodetector performance is evaluated through current–voltage and current–transient measurements under varying light intensities and wavelengths. PEDOT films synthesized at 10 W exhibit superior photodetector performance, with maximum responsivity and detectivity of 0.0975 A W−1 and 1.65 × 1010 cm Hz0.5 W−1 at 900 nm, and a noise-equivalent power of 5.38 × 10−12 W Hz−1/2. Maximum external quantum efficiency is recorded as 23.975% at 450 nm. These results emphasize the suitability of low-power PEDOT films for optoelectronic applications due to their superior morphology and optoelectronic characteristics. © 2025 Wiley-VCH GmbH.Article Large-Area Deposition of Hydrophobic Poly(Hexafluorobutyl Acrylate) Thin Films on Wetting-Sensitive and Flexible Substrates Via Plasma-Enhanced Chemical Vapor Deposition(Mdpi, 2025-03-17) Yilmaz, Kurtulus; Gursoy, Mehmet; Karaman, MustafaIn this study, hydrophobic poly(hexafluorobutyl acrylate) (PHFBA) thin films were successfully deposited over a large area of 25 x 50 cm using plasma-enhanced chemical vapor deposition (PECVD). Key parameters, including plasma power and the distance between the plasma antenna and the substrate, were optimized to achieve the highest deposition rate while ensuring uniformity and defect-free coatings. The optimal conditions were determined as 5 W plasma power and a 9 cm antenna-substrate distance, yielding a maximum deposition rate of 11.3 nm/min. PHFBA's low fluorine content makes it a more environmentally and biologically friendly alternative compared to heavily fluorinated polymers, addressing concerns about toxicity and environmental impact. The coatings were applied to a flexible and wetting-sensitive paper towel substrate, which was successfully coated without any visible defects. The contact angle measurements confirmed the hydrophobic nature of the films, with a maximum water contact angle of 131.9 degrees after the deposition of PHFBA. This study highlights the potential of PECVD as an efficient and scalable method for producing hydrophobic coatings, combining high-performance properties with improved environmental considerations. The results not only validate PECVD as a scalable and precise method for thin film fabrication but also open new possibilities for its use in applications requiring durable and functional surface modifications.