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Photoresponse Amplification of Silicon Carbide Ultraviolet Photodetector via In Situ Nitrogen Doping Kasif Teker1,a* 1The Advanced Micro- and Nano- Devices Laboratory, Faculty of Engineering, Bogaziçi University, Istanbul, Turkey aemail: kasif.teker@bogazici.edu.tr Keywords: Ultraviolet photodetectors, Silicon carbide, Nitrogen doping, High sensitivity, Photoresponse enhancement, Optoelectronic devices Abstract.
From a material perspective for harsh environment electronic and photonic applications, Silicon lacks some required attributes such as its limitation in UV radiation resistance, operation temperature (below 150oC), and requiring costly filters [5].
Therefore, wide bandgap (WBG) semiconductors such as silicon carbide (SiC) [6], gallium nitride (GaN) [7], aluminum nitride (AlN) [8], zinc oxide (ZnO) [9-10], titanium dioxide (TiO2) [11], and gallium oxide (Ga2O3) [12] are becoming choice of materials in fabrication of photodetectors for harsh environment applications due to their wide bandgap, high radiation resistance, stability, and overall performance. 3C-SiC is a great choice in fabricating electronic and photonic devices due to its high radiation resistance, highest electron mobility among its polytypes, wide bandgap, high operating temperature, ability to grow on Si substrate, high power, high responsivity in the short wavelength, high operating voltage, and high operating frequency [13].
In this study, the effects of in-situ nitrogen doping on key performance parameters including sensitivity, repeatability, and response time of the 3C-SiC ultraviolet photodetectors (SiC-UVPD) under 254 nm UV illumination at various bias voltages up to 20 V were investigated (for the first time to the best of author’s knowledge).
Material Voltage (V) Wavelength (nm) ION/IOFF Ratio Sensitivity (%) RT (s) DT (s) Ref. β-Ga2O3 20 270 1.6 x 103 - 1.4 0.1 [12] N-doped TiO2 10 380 - - - 259 [11] N-doped ZnO 5 360 30.33 - 560 430 [10] Mg-doped ZnO 5 365 - 71.68 x 102 381 122.5 [9] Ga-doped ZnO 5 365 9.32 x 102 - 3 9 [27] Al-doped ZnO 5 365 - - 344.6 579.6 [28] Sm-doped ZnO nanostructure 20 365 - 3.97 x 102 - - [29] Al-doped ZnO nanorod- nanoflake 10 365 34.6 - 53 107 [22] n-TiO2/ p-NiO nanosheets 0 350 ~14 1.2 7.1 [30] 3C-SiC/Si 20 254 - 1.86 x 104 0.57 0.96 [6] Undoped SiC-UVPD 20 254 1.29 x 103 1.28 x 105 0.20 0.22 TW 1-sccm N2-doped SiC-UVPD 20 254 1.32 x 103 1.32 x 105 0.18 0.19 TW 8-sccm N2-doped SiC-UVPD 20 254 1.94 x 103 1.94 x 105 0.18 0.20 TW the magnesium-doped ZnO UV photodetector with rise and decay times of 381 s and 122.5 s, respectively [9]; the nitrogen-doped TiO2 UV photodetector with a decay time of 259 s [11]; and the β-Ga2O3 UV photodetector with rise and decay times of 1.4 s and 0.1 s, respectively

Sparse Solution Techniques in Load and Damage Monitoring Systems Claus-Peter Fritzen1,2,a∗ , Daniel Ginsberg1,b 1Department of Mechanical Engineering, University of Siegen, Paul-Bonatz 9-11, 57076 Siegen, Germany 2Center of Sensor Systems, University of Siegen, Paul-Bonatz 9-11, 57076 Siegen, Germany aclaus-peter.fritzen@uni-siegen.de, bdaniel.ginsberg@uni-siegen.de Keywords: Sparse reconstruction, l1-regularization, load monitoring, impact identification, damage detection, sensitivity analysis, damage localization Abstract.
Fritzen, New approach for impact detection by finding sparse solution, Proceedings of the International Conference on Noise and Vibration Engineering, 2014, pp. 2051- 2064
Fritzen, Vibration-Based Structural Health Monitoring - Concepts and Applications, Key Engineering Materials - Damage Assessment of Structures VI, 293, 2005, pp. 3-20

Effect of Water Conditions on Macro-Cell Corrosion Potential Difference and Current Density of Reinforcing Steel in Concrete CAO Zhonglu1, 2, a* 1Tianjin Port Engineering Institute Co., Ltd. of CCCC First Harbor Engineering Co., Ltd., Tianjin, China 2CCCC First Harbor Engineering Company Ltd., Tianjin, China acaozhonglu@126.com Keywords: Water conditions, Marine concrete structure, Micro-cell corrosion, Macro-cell corrosion Abstract.
Experimental Materials.
Zhonglu, Corrosion behaviors of reinforcing steel in concrete with various moisture contents, Key Eng.

The authors also gratefully acknowledge uses of laboratory facilities at the School of Chemistry and Environment, Faculty of Applied Sciences, and the School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam.
Spyropoulos, Process optimisation of rotating membrane emulsification through the study of surfactant dispersion, Journal of Food Engineering 166 (2015) 316-324
Physicochemical and Engineering Aspects 531 (2017) 32-39
Fayaz, Rheology and stability mechanism of water-in-crude oil emulsions stabilized by Span 83, ARPN Journal of Engineering and Applied Science 11(4) (2016) 2230-2235
Schrock, Sensitivities of droplet size and stability in monomeric emulsions, Industrial and Engineering Chemistry Research 32 (2) (1993) 373-385

Solvent-free Liquid Phase Oxidation of Benzyl Alcohol to Benzaldehyde over Superfine MgAl2O4 Supported Co-based Catalysts：Effects of Support MgAl2O4 Xin Zhang, Min Qi, Guiquan Zhang, Tao Lin, Ting Gong School of Chemical Engineering, Northwest University, Taibai North Road 229, Xi’an, China email: zhangxinzhangcn@yahoo.com.cn Keywords: MgAl2O4; Hydrothermal Synthesis; Liquid Phase Oxidation; Benzyl Alcohol; Benzaldehyde; Support Effect Abstract: MgAl2O4 was respectively prepared by hydrothermal method (MgAl2O4-HT), co-precipitation method (MgAl2O4-CP) and solid reaction method (MgAl2O4-SR).
Introduction Benzaldehyde (BzH) is one of important raw materials to produce pharmaceutical, perfumery and dye, etc.
MgAl2O4 has been widely used as ceramic and refractory material.
MgAl2O4 as catalyst material is desirable to be high-surface-area and porous.
Hydrothermal synthesis is considered to be an effective method for preparing high-surface-area material with the controlled stoichiometric composition and the low cost.

Lourenço.c ISISE, Department of Civil Engineering, University of Minho, Campus de Azurém 4800-058 Guimarães, Portugal avghaach@civil.uminho.pt, bgraca@civil.uminho.pt, cpbl@civil.uminho.pt Keywords: Concrete block reinforced masonry; Masonry beams, Construction technology; Bed joint reinforcement; Flexural testing.
Besides the experimental behavior of the masonry beams, an experimental campaign was also performed in order to obtain the mechanical properties of the masonry materials and of the masonry as a composite material.
It is observed that the introduction of horizontal reinforcement, the increase on its ratio and its distribution along the height plays a key role on the increase of the strength and ductility of the masonry beams, in any of the adopted masonry bonds.
Lourenço: Influence of the geometry of units and of the filling of vertical joints in the compressive and tensile strength of masonry, Materials Science Forum, (in this issue).

Electrochemical Sensor Based on Molecularly Imprinted Carbon Nanotubes for Selective Determination of Bisphenol A Huimin Zhao1,a, Yaqiong Chen1, Hongbo Cheng1, Fang Yuan1 and Xie Quan1 1 Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China, 116024 azhaohuim@dlut.edu.cn Keywords: Molecularly Imprinted polymers; Multi-wall Carbon Nanotubes; Electrochemical Sensor; Bisphenol A Abstract.
As a result of its extensively employed in resultant products, such as electrical and electronic equipments, beverage cans, dental sealants, and food packaging materials, BPA would inevitably be released into water during the manufacture, use, and disposal process.
Although enzyme-linked immunosorbent assay (ELISA) can offer rapid determination, it suffers from the low stability of the biological material and the complicated multistage steps [7].
Considering its high adsorption capacity and specific surface area, CNTs has been used as support material for MIPs to supply more recognition sites in MIPs based sensors for the determination of insulin, tyramine, uric acid, and other biogenic compounds [23-26].
The only reported MIPs based sensor for BPA analysis was using a sol-gel rigidity network as the recognition material and gold electrode as electrode substrate [27].

Luminescent materials held a lion’s share amongst all functional materials.
Introduction Smart materials have been considered to be the next generation of natural materials.
These materials are engineered to have best specific properties or additional properties such as optical, sensing electric and magnetic fields.
Chi, Mechanochromic Fluorescent Materials: Phenomena, Materials and applications, Royal Society of Chemistry, UK, 2014
Segal, Chemical synthesis of ceramic materials, J.

What is more, this method is a reference for geotechnical engineering and other field to apply data mining technology.
Ground engineering, Vol. 7/8 (1995) [6] D.
Journal of Civil Engineering, Vol. 10 (10) (2006), p. 102-107 (in Chinese) [8] Suhua Li, Jian Zhou, and WeihuangYang, et al.
Chinese Journal of Rock Mechanics and Engineering, Vol. 22(9) (2003), p. 1571-1577 (in Chinese) [9] Chenghua Wang, Wei Zhang.
Chineas Journal of Rock Mechanics and Engineering, Vol. 24 (2) (2005), p. 328-335 (in Chinese) [15] Yanbing Gong, Senfa Chen.

Chaichan4,e, Muhammad Aqil Afham Rahmat5,f 1Department of Mechanical Engineering, University of National Energy, Malaysia 2Air Conditioning and Refrigeration Techniques Engineering Department, College of Engineering and Technologies, Al-Mustaqbal University, Babylon 51001, Iraq. 3Faculty of Engineering, Sohar University, PO Box 44, Sohar, PCI 311, Oman 4Energy and Renewable Energies Technology Centre, University of Technology- Iraq 5Solar Energy Research Institute, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia aFiras@uniten.edu.my, bfaizul.izz1251@gmail.com, cAbdulKareem.Abdulwahab@uomus.edu.iq, dh.kazem@su.edu.om, emiqdam.t.chaichan@uotechnology.edu.iq, fmuhdaqilafham97@gmail.com Keywords: Design, Development, Natural Lighting System, Modern, Malaysian Building.
By explicitly defining these features, the study aims to provide a clearer understanding of the engineering work conducted. 4.
Journal of Building Engineering, 29, 101198. https://doi.org/ 10.1016/j.jobe.2020.101198 [19] Azis, S.
Ain Shams Engineering Journal, 14(5), p.101970
Thermal Science and Engineering Progress, 23, p.100877.