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607 results on '"Akbulut, Mustafa"'

7. Temperature Dependent Characteristics and Electrostatic Threshold Voltage Tuning of Accumulated Body MOSFETs

Author

Talukder, A. B. M. Hasan, Smith, Brittany, Akbulut, Mustafa, Dirisaglik, Faruk, Silva, Helena, and Gokirmak, Ali

Subjects
Physics - Applied Physics
Abstract

Narrow-channel accumulated body nMOSFET devices with p-type side-gates surrounding the active area have been electrically characterized between 100 and 400 K with varied side-gate biasing (Vside). The subthreshold slope (SS) and drain induced barrier lowering (DIBL) decrease and threshold voltage (Vt) increases linearly with reduced temperature and reduced side-gate bias. Detailed analysis on a 27 nm x 78 nm (width x length) device show SS decreasing from 115 mV/dec at 400 K to 90 mV/dec at 300 K and down to 36 mV/dec at 100 K, DIBL decreasing by approximately 10 mV/V for each 100 K reduction in operating temperature, and Vt increasing from 0.42 V to 0.61 V as the temperature is reduced from 400 K to 100 K. Vt can be adjusted from ~ 0.3 V to ~ 1.1 V with ~0.3 V/V sensitivity by depletion or accumulation of the body of the device using Vside. This high level of tunability allows electronic control of Vt and drive current for variable temperature operation in a wide temperature range with extremely low leakage currents (< 10-13 A)., Comment: 6 pages, 8 figures, Submitted to IEEE T-ED

Published
2021

20. Bacterial Antifouling Characteristics of Helicene-Graphene Films.

Author

Liu, Shuhao, Bae, Michael, Hao, Li, Oh, Jun, White, Andrew, Min, Younjin, Cisneros-Zevallos, Luis, and Akbulut, Mustafa

Subjects
Langmuir-Schaefer, S. aureus, bacterial antifouling, helicene, thin film
Abstract

Herein, we describe interfacially-assembled [7]helicene films that were deposited on graphene monolayer using the Langmuir-Schaefer deposition by utilizing the interactions of nonplanar (helicene) and planar (graphene) π-π interactions as functional antifouling coatings. Bacterial adhesion of Staphylococcus aureus on helicene-graphene films was noticeably lower than that on bare graphene, up to 96.8% reductions in bacterial adhesion. The promising bacterial antifouling characteristics of helicene films was attributed to the unique molecular geometry of helicene, i.e., nano-helix, which can hinder the nanoscale bacterial docking processes on a surface. We envision that helicene-graphene films may eventually be used as protective coatings against bacterial antifouling on the electronic components of clinical and biomedical devices.

Published
2021

43. QTL mapping for fatty acid composition in olive oil using a high-density genetic map based on SNP markers.

Author

KAYA, Ali Can, İPEK, Meryem, İPEK, Ahmet, GÜNDOĞDU, Mehmet Ali, AKTEPE TANGU, Nesrin, TEOMAN DURAN, Sevin, ŞEKER, Murat, and AKBULUT, Mustafa

Subjects
LOCUS (Genetics), OLEIC acid, OLIVE oil, FATTY acids, MEDITERRANEAN climate, OLIVE
Abstract

Olive (Olea europaea L.) is an evergreen tree species that grows naturally in regions with Mediterranean climates. Its oil and fruits are commercially valuable. Olive oil contains high levels of omega-9 (oleic acid). Because the high percentage of oleic acid makes olive oil deterioration-resistant, the development of olive varieties containing high oleic acid is one of the major goals of olive breeding programs. Therefore, this study aimed to determine quantitative trait loci (QTL) affecting the fatty acid composition of olive oil. Thus, early selection of olive genotypes with a high oleic acid content can be possible. For the determination of QTLs affecting the fatty acid composition of olive oil, a high-density genetic map was developed using a segregating olive F1 population with 121 progeny and single- nucleotide polymorphism (SNP) markers based on genotyping by sequencing (GBS). The 2892.14 cM genetic map was composed of 3254 SNP markers on 23 chromosomes, with an average distance of 0.93 cM. For QTL analysis, the fatty acid composition of the segregating olive F1 population was determined using gas chromatography in two different years. A total of 31 QTLs were discovered in the first year and 29 in the second year. Common QTLs associated with fatty acid composition in both years have been found on chromosome 1, chromosome 2, and chromosome 10. For oleic acid, 11 QTLs were discovered in the first year and 12 QTLs in the second year. With these results, the QTLs linked to fatty acid synthesis in olive oil can be used as genetic resources for marker-assisted selection (MAS) in olive breeding studies. [ABSTRACT FROM AUTHOR]

Published
2024
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